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> 29a4dad1aeSDavid Turner #include <linux/version.h> 30ca0faba0STheodore Ts'o #include <linux/wait.h> 31174cd4b1SIngo Molnar #include <linux/sched/signal.h> 32ca0faba0STheodore Ts'o #include <linux/blockgroup_lock.h> 33ca0faba0STheodore Ts'o #include <linux/percpu_counter.h> 34efbed4dcSTheodore Ts'o #include <linux/ratelimit.h> 350441984aSDarrick J. Wong #include <crypto/hash.h> 3646f47e48SEric Biggers #ifdef CONFIG_EXT4_FS_ENCRYPTION 3746f47e48SEric Biggers #include <linux/fscrypt_supp.h> 3846f47e48SEric Biggers #else 3946f47e48SEric Biggers #include <linux/fscrypt_notsupp.h> 4046f47e48SEric Biggers #endif 41a633f5a3SLukas Czerner #include <linux/falloc.h> 42c8585c6fSDaeho Jeong #include <linux/percpu-rwsem.h> 434d92dc0fSBen Hutchings #ifdef __KERNEL__ 444d92dc0fSBen Hutchings #include <linux/compat.h> 454d92dc0fSBen Hutchings #endif 463dcf5451SChristoph Hellwig 473dcf5451SChristoph Hellwig /* 488a35694eSShen Feng * The fourth extended filesystem constants/structures 493dcf5451SChristoph Hellwig */ 503dcf5451SChristoph Hellwig 513dcf5451SChristoph Hellwig /* 52a2821e34SAihua Zhang * with AGGRESSIVE_CHECK allocator runs consistency checks over 53a2821e34SAihua Zhang * structures. these checks slow things down a lot 54a2821e34SAihua Zhang */ 55a2821e34SAihua Zhang #define AGGRESSIVE_CHECK__ 56a2821e34SAihua Zhang 57a2821e34SAihua Zhang /* 58a2821e34SAihua Zhang * with DOUBLE_CHECK defined mballoc creates persistent in-core 59a2821e34SAihua Zhang * bitmaps, maintains and uses them to check for double allocations 60a2821e34SAihua Zhang */ 61a2821e34SAihua Zhang #define DOUBLE_CHECK__ 62a2821e34SAihua Zhang 63a2821e34SAihua Zhang /* 643dcf5451SChristoph Hellwig * Define EXT4FS_DEBUG to produce debug messages 653dcf5451SChristoph Hellwig */ 663dcf5451SChristoph Hellwig #undef EXT4FS_DEBUG 673dcf5451SChristoph Hellwig 683dcf5451SChristoph Hellwig /* 693dcf5451SChristoph Hellwig * Debug code 703dcf5451SChristoph Hellwig */ 713dcf5451SChristoph Hellwig #ifdef EXT4FS_DEBUG 723dcf5451SChristoph Hellwig #define ext4_debug(f, a...) \ 733dcf5451SChristoph Hellwig do { \ 743dcf5451SChristoph Hellwig printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ 754db9c54aSStoyan Gaydarov __FILE__, __LINE__, __func__); \ 763dcf5451SChristoph Hellwig printk(KERN_DEBUG f, ## a); \ 773dcf5451SChristoph Hellwig } while (0) 783dcf5451SChristoph Hellwig #else 79ace36ad4SJoe Perches #define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) 803dcf5451SChristoph Hellwig #endif 813dcf5451SChristoph Hellwig 824a092d73STheodore Ts'o /* 834a092d73STheodore Ts'o * Turn on EXT_DEBUG to get lots of info about extents operations. 844a092d73STheodore Ts'o */ 854a092d73STheodore Ts'o #define EXT_DEBUG__ 864a092d73STheodore Ts'o #ifdef EXT_DEBUG 874a092d73STheodore Ts'o #define ext_debug(fmt, ...) printk(fmt, ##__VA_ARGS__) 884a092d73STheodore Ts'o #else 894a092d73STheodore Ts'o #define ext_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) 904a092d73STheodore Ts'o #endif 914a092d73STheodore Ts'o 92d444c3c3STheodore Ts'o /* data type for block offset of block group */ 93d444c3c3STheodore Ts'o typedef int ext4_grpblk_t; 94d444c3c3STheodore Ts'o 95d444c3c3STheodore Ts'o /* data type for filesystem-wide blocks number */ 96d444c3c3STheodore Ts'o typedef unsigned long long ext4_fsblk_t; 97d444c3c3STheodore Ts'o 98d444c3c3STheodore Ts'o /* data type for file logical block number */ 99d444c3c3STheodore Ts'o typedef __u32 ext4_lblk_t; 100d444c3c3STheodore Ts'o 101d444c3c3STheodore Ts'o /* data type for block group number */ 102d444c3c3STheodore Ts'o typedef unsigned int ext4_group_t; 103d444c3c3STheodore Ts'o 104331573feSNamjae Jeon enum SHIFT_DIRECTION { 105331573feSNamjae Jeon SHIFT_LEFT = 0, 106331573feSNamjae Jeon SHIFT_RIGHT, 107331573feSNamjae Jeon }; 108331573feSNamjae Jeon 109296c355cSTheodore Ts'o /* 110296c355cSTheodore Ts'o * Flags used in mballoc's allocation_context flags field. 111296c355cSTheodore Ts'o * 112296c355cSTheodore Ts'o * Also used to show what's going on for debugging purposes when the 113296c355cSTheodore Ts'o * flag field is exported via the traceport interface 114296c355cSTheodore Ts'o */ 115d444c3c3STheodore Ts'o 1163dcf5451SChristoph Hellwig /* prefer goal again. length */ 1170ef90db9STheodore Ts'o #define EXT4_MB_HINT_MERGE 0x0001 1183dcf5451SChristoph Hellwig /* blocks already reserved */ 1190ef90db9STheodore Ts'o #define EXT4_MB_HINT_RESERVED 0x0002 1203dcf5451SChristoph Hellwig /* metadata is being allocated */ 1210ef90db9STheodore Ts'o #define EXT4_MB_HINT_METADATA 0x0004 1223dcf5451SChristoph Hellwig /* first blocks in the file */ 1230ef90db9STheodore Ts'o #define EXT4_MB_HINT_FIRST 0x0008 1243dcf5451SChristoph Hellwig /* search for the best chunk */ 1250ef90db9STheodore Ts'o #define EXT4_MB_HINT_BEST 0x0010 1263dcf5451SChristoph Hellwig /* data is being allocated */ 1270ef90db9STheodore Ts'o #define EXT4_MB_HINT_DATA 0x0020 1283dcf5451SChristoph Hellwig /* don't preallocate (for tails) */ 1290ef90db9STheodore Ts'o #define EXT4_MB_HINT_NOPREALLOC 0x0040 1303dcf5451SChristoph Hellwig /* allocate for locality group */ 1310ef90db9STheodore Ts'o #define EXT4_MB_HINT_GROUP_ALLOC 0x0080 1323dcf5451SChristoph Hellwig /* allocate goal blocks or none */ 1330ef90db9STheodore Ts'o #define EXT4_MB_HINT_GOAL_ONLY 0x0100 1343dcf5451SChristoph Hellwig /* goal is meaningful */ 1350ef90db9STheodore Ts'o #define EXT4_MB_HINT_TRY_GOAL 0x0200 136d2a17637SMingming Cao /* blocks already pre-reserved by delayed allocation */ 1370ef90db9STheodore Ts'o #define EXT4_MB_DELALLOC_RESERVED 0x0400 1384ba74d00STheodore Ts'o /* We are doing stream allocation */ 1394ba74d00STheodore Ts'o #define EXT4_MB_STREAM_ALLOC 0x0800 14055f020dbSAllison Henderson /* Use reserved root blocks if needed */ 14155f020dbSAllison Henderson #define EXT4_MB_USE_ROOT_BLOCKS 0x1000 14227dd4385SLukas Czerner /* Use blocks from reserved pool */ 14327dd4385SLukas Czerner #define EXT4_MB_USE_RESERVED 0x2000 1443dcf5451SChristoph Hellwig 1453dcf5451SChristoph Hellwig struct ext4_allocation_request { 1463dcf5451SChristoph Hellwig /* target inode for block we're allocating */ 1473dcf5451SChristoph Hellwig struct inode *inode; 1483dcf5451SChristoph Hellwig /* how many blocks we want to allocate */ 149498e5f24STheodore Ts'o unsigned int len; 150726447d8SEric Sandeen /* logical block in target inode */ 151726447d8SEric Sandeen ext4_lblk_t logical; 152726447d8SEric Sandeen /* the closest logical allocated block to the left */ 153726447d8SEric Sandeen ext4_lblk_t lleft; 154726447d8SEric Sandeen /* the closest logical allocated block to the right */ 155726447d8SEric Sandeen ext4_lblk_t lright; 156726447d8SEric Sandeen /* phys. target (a hint) */ 157726447d8SEric Sandeen ext4_fsblk_t goal; 158726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the left */ 159726447d8SEric Sandeen ext4_fsblk_t pleft; 160726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the right */ 161726447d8SEric Sandeen ext4_fsblk_t pright; 1623dcf5451SChristoph Hellwig /* flags. see above EXT4_MB_HINT_* */ 163498e5f24STheodore Ts'o unsigned int flags; 1643dcf5451SChristoph Hellwig }; 1653dcf5451SChristoph Hellwig 1663dcf5451SChristoph Hellwig /* 167e35fd660STheodore Ts'o * Logical to physical block mapping, used by ext4_map_blocks() 168e35fd660STheodore Ts'o * 169e35fd660STheodore Ts'o * This structure is used to pass requests into ext4_map_blocks() as 170e35fd660STheodore Ts'o * well as to store the information returned by ext4_map_blocks(). It 171e35fd660STheodore Ts'o * takes less room on the stack than a struct buffer_head. 172e35fd660STheodore Ts'o */ 173e35fd660STheodore Ts'o #define EXT4_MAP_NEW (1 << BH_New) 174e35fd660STheodore Ts'o #define EXT4_MAP_MAPPED (1 << BH_Mapped) 175e35fd660STheodore Ts'o #define EXT4_MAP_UNWRITTEN (1 << BH_Unwritten) 176e35fd660STheodore Ts'o #define EXT4_MAP_BOUNDARY (1 << BH_Boundary) 177e35fd660STheodore Ts'o #define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\ 178cbd7584eSJan Kara EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY) 179e35fd660STheodore Ts'o 180e35fd660STheodore Ts'o struct ext4_map_blocks { 181e35fd660STheodore Ts'o ext4_fsblk_t m_pblk; 182e35fd660STheodore Ts'o ext4_lblk_t m_lblk; 183e35fd660STheodore Ts'o unsigned int m_len; 184e35fd660STheodore Ts'o unsigned int m_flags; 185e35fd660STheodore Ts'o }; 186e35fd660STheodore Ts'o 187e35fd660STheodore Ts'o /* 188bd2d0210STheodore Ts'o * Flags for ext4_io_end->flags 189bd2d0210STheodore Ts'o */ 190bd2d0210STheodore Ts'o #define EXT4_IO_END_UNWRITTEN 0x0001 191bd2d0210STheodore Ts'o 1924188188bSCurt Wohlgemuth /* 193556615dcSLukas Czerner * For converting unwritten extents on a work queue. 'handle' is used for 1946b523df4SJan Kara * buffered writeback. 1954188188bSCurt Wohlgemuth */ 1960031462bSMingming Cao typedef struct ext4_io_end { 1975b3ff237Sjiayingz@google.com (Jiaying Zhang) struct list_head list; /* per-file finished IO list */ 1986b523df4SJan Kara handle_t *handle; /* handle reserved for extent 1996b523df4SJan Kara * conversion */ 2000031462bSMingming Cao struct inode *inode; /* file being written to */ 201b0857d30SJan Kara struct bio *bio; /* Linked list of completed 202b0857d30SJan Kara * bios covering the extent */ 2038d5d02e6SMingming Cao unsigned int flag; /* unwritten or not */ 2043bd6ad7bSJan Kara atomic_t count; /* reference counter */ 205a1de02dcSEric Sandeen loff_t offset; /* offset in the file */ 206a1de02dcSEric Sandeen ssize_t size; /* size of the extent */ 2070031462bSMingming Cao } ext4_io_end_t; 2080031462bSMingming Cao 209bd2d0210STheodore Ts'o struct ext4_io_submit { 2105a33911fSTejun Heo struct writeback_control *io_wbc; 211bd2d0210STheodore Ts'o struct bio *io_bio; 212bd2d0210STheodore Ts'o ext4_io_end_t *io_end; 213bd2d0210STheodore Ts'o sector_t io_next_block; 214bd2d0210STheodore Ts'o }; 215bd2d0210STheodore Ts'o 216b3a3ca8cSTheodore Ts'o /* 2173dcf5451SChristoph Hellwig * Special inodes numbers 2183dcf5451SChristoph Hellwig */ 2193dcf5451SChristoph Hellwig #define EXT4_BAD_INO 1 /* Bad blocks inode */ 2203dcf5451SChristoph Hellwig #define EXT4_ROOT_INO 2 /* Root inode */ 221ae812306SAditya Kali #define EXT4_USR_QUOTA_INO 3 /* User quota inode */ 222ae812306SAditya Kali #define EXT4_GRP_QUOTA_INO 4 /* Group quota inode */ 2233dcf5451SChristoph Hellwig #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ 2243dcf5451SChristoph Hellwig #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ 2253dcf5451SChristoph Hellwig #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ 2263dcf5451SChristoph Hellwig #define EXT4_JOURNAL_INO 8 /* Journal inode */ 2273dcf5451SChristoph Hellwig 2283dcf5451SChristoph Hellwig /* First non-reserved inode for old ext4 filesystems */ 2293dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_FIRST_INO 11 2303dcf5451SChristoph Hellwig 2313dcf5451SChristoph Hellwig /* 2323dcf5451SChristoph Hellwig * Maximal count of links to a file 2333dcf5451SChristoph Hellwig */ 2343dcf5451SChristoph Hellwig #define EXT4_LINK_MAX 65000 2353dcf5451SChristoph Hellwig 2363dcf5451SChristoph Hellwig /* 2373dcf5451SChristoph Hellwig * Macro-instructions used to manage several block sizes 2383dcf5451SChristoph Hellwig */ 2393dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_SIZE 1024 2403dcf5451SChristoph Hellwig #define EXT4_MAX_BLOCK_SIZE 65536 2413dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_LOG_SIZE 10 242fb1813f4SCurt Wohlgemuth #define EXT4_MAX_BLOCK_LOG_SIZE 16 2439e47a4c9STheodore Ts'o #define EXT4_MAX_CLUSTER_LOG_SIZE 30 2443dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2453dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) 2463dcf5451SChristoph Hellwig #else 2473dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) 2483dcf5451SChristoph Hellwig #endif 2493dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32)) 250281b5995STheodore Ts'o #define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \ 251281b5995STheodore Ts'o EXT4_SB(s)->s_cluster_bits) 2523dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2533dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) 254281b5995STheodore Ts'o # define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits) 2553dcf5451SChristoph Hellwig #else 2563dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) 2573dcf5451SChristoph Hellwig #endif 2583dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2593dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) 2603dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) 2613dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) 2623dcf5451SChristoph Hellwig #else 2633dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 2643dcf5451SChristoph Hellwig EXT4_GOOD_OLD_INODE_SIZE : \ 2653dcf5451SChristoph Hellwig (s)->s_inode_size) 2663dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 2673dcf5451SChristoph Hellwig EXT4_GOOD_OLD_FIRST_INO : \ 2683dcf5451SChristoph Hellwig (s)->s_first_ino) 2693dcf5451SChristoph Hellwig #endif 2703dcf5451SChristoph Hellwig #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) 271518eaa63SFabian Frederick #define EXT4_MAX_BLOCKS(size, offset, blkbits) \ 272518eaa63SFabian Frederick ((EXT4_BLOCK_ALIGN(size + offset, blkbits) >> blkbits) - (offset >> \ 273518eaa63SFabian Frederick blkbits)) 2743dcf5451SChristoph Hellwig 275d5b8f310STheodore Ts'o /* Translate a block number to a cluster number */ 276d5b8f310STheodore Ts'o #define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits) 277d5b8f310STheodore Ts'o /* Translate a cluster number to a block number */ 278d5b8f310STheodore Ts'o #define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits) 279d5b8f310STheodore Ts'o /* Translate # of blks to # of clusters */ 280d5b8f310STheodore Ts'o #define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \ 281d5b8f310STheodore Ts'o (sbi)->s_cluster_bits) 282f5a44db5STheodore Ts'o /* Mask out the low bits to get the starting block of the cluster */ 283f5a44db5STheodore Ts'o #define EXT4_PBLK_CMASK(s, pblk) ((pblk) & \ 284f5a44db5STheodore Ts'o ~((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 285f5a44db5STheodore Ts'o #define EXT4_LBLK_CMASK(s, lblk) ((lblk) & \ 286f5a44db5STheodore Ts'o ~((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 287f5a44db5STheodore Ts'o /* Get the cluster offset */ 288f5a44db5STheodore Ts'o #define EXT4_PBLK_COFF(s, pblk) ((pblk) & \ 289f5a44db5STheodore Ts'o ((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 290f5a44db5STheodore Ts'o #define EXT4_LBLK_COFF(s, lblk) ((lblk) & \ 291f5a44db5STheodore Ts'o ((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 292d5b8f310STheodore Ts'o 2933dcf5451SChristoph Hellwig /* 2943dcf5451SChristoph Hellwig * Structure of a blocks group descriptor 2953dcf5451SChristoph Hellwig */ 2963dcf5451SChristoph Hellwig struct ext4_group_desc 2973dcf5451SChristoph Hellwig { 2983dcf5451SChristoph Hellwig __le32 bg_block_bitmap_lo; /* Blocks bitmap block */ 2993dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ 3003dcf5451SChristoph Hellwig __le32 bg_inode_table_lo; /* Inodes table block */ 301560671a0SAneesh Kumar K.V __le16 bg_free_blocks_count_lo;/* Free blocks count */ 302560671a0SAneesh Kumar K.V __le16 bg_free_inodes_count_lo;/* Free inodes count */ 303560671a0SAneesh Kumar K.V __le16 bg_used_dirs_count_lo; /* Directories count */ 3043dcf5451SChristoph Hellwig __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ 305e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_lo; /* Exclude bitmap for snapshots */ 306e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+bbitmap) LE */ 307e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+ibitmap) LE */ 308560671a0SAneesh Kumar K.V __le16 bg_itable_unused_lo; /* Unused inodes count */ 3093dcf5451SChristoph Hellwig __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ 3103dcf5451SChristoph Hellwig __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ 3113dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ 3123dcf5451SChristoph Hellwig __le32 bg_inode_table_hi; /* Inodes table block MSB */ 3133dcf5451SChristoph Hellwig __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */ 3143dcf5451SChristoph Hellwig __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */ 3153dcf5451SChristoph Hellwig __le16 bg_used_dirs_count_hi; /* Directories count MSB */ 3163dcf5451SChristoph Hellwig __le16 bg_itable_unused_hi; /* Unused inodes count MSB */ 317e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_hi; /* Exclude bitmap block MSB */ 318e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+bbitmap) BE */ 319e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+ibitmap) BE */ 320e6153918SDarrick J. Wong __u32 bg_reserved; 3213dcf5451SChristoph Hellwig }; 3223dcf5451SChristoph Hellwig 32341a246d1SDarrick J. Wong #define EXT4_BG_INODE_BITMAP_CSUM_HI_END \ 32441a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \ 32541a246d1SDarrick J. Wong sizeof(__le16)) 32641a246d1SDarrick J. Wong #define EXT4_BG_BLOCK_BITMAP_CSUM_HI_END \ 32741a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \ 32841a246d1SDarrick J. Wong sizeof(__le16)) 32941a246d1SDarrick J. Wong 330772cb7c8SJose R. Santos /* 331772cb7c8SJose R. Santos * Structure of a flex block group info 332772cb7c8SJose R. Santos */ 333772cb7c8SJose R. Santos 334772cb7c8SJose R. Santos struct flex_groups { 33590ba983fSTheodore Ts'o atomic64_t free_clusters; 3369f24e420STheodore Ts'o atomic_t free_inodes; 3377d39db14STheodore Ts'o atomic_t used_dirs; 338772cb7c8SJose R. Santos }; 339772cb7c8SJose R. Santos 3403dcf5451SChristoph Hellwig #define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ 3413dcf5451SChristoph Hellwig #define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ 3423dcf5451SChristoph Hellwig #define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ 3433dcf5451SChristoph Hellwig 3443dcf5451SChristoph Hellwig /* 3453dcf5451SChristoph Hellwig * Macro-instructions used to manage group descriptors 3463dcf5451SChristoph Hellwig */ 3473dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE 32 3483dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE_64BIT 64 3493dcf5451SChristoph Hellwig #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE 3503dcf5451SChristoph Hellwig #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) 3513dcf5451SChristoph Hellwig #ifdef __KERNEL__ 3523dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) 353281b5995STheodore Ts'o # define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group) 3543dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) 3553dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) 3563dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) 3573dcf5451SChristoph Hellwig #else 3583dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) 3593dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) 3603dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) 3613dcf5451SChristoph Hellwig #endif 3623dcf5451SChristoph Hellwig 3633dcf5451SChristoph Hellwig /* 3643dcf5451SChristoph Hellwig * Constants relative to the data blocks 3653dcf5451SChristoph Hellwig */ 3663dcf5451SChristoph Hellwig #define EXT4_NDIR_BLOCKS 12 3673dcf5451SChristoph Hellwig #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS 3683dcf5451SChristoph Hellwig #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) 3693dcf5451SChristoph Hellwig #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) 3703dcf5451SChristoph Hellwig #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) 3713dcf5451SChristoph Hellwig 3723dcf5451SChristoph Hellwig /* 3733dcf5451SChristoph Hellwig * Inode flags 3743dcf5451SChristoph Hellwig */ 3753dcf5451SChristoph Hellwig #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ 3763dcf5451SChristoph Hellwig #define EXT4_UNRM_FL 0x00000002 /* Undelete */ 3773dcf5451SChristoph Hellwig #define EXT4_COMPR_FL 0x00000004 /* Compress file */ 3783dcf5451SChristoph Hellwig #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ 3793dcf5451SChristoph Hellwig #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ 3803dcf5451SChristoph Hellwig #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ 3813dcf5451SChristoph Hellwig #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ 3823dcf5451SChristoph Hellwig #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ 3833dcf5451SChristoph Hellwig /* Reserved for compression usage... */ 3843dcf5451SChristoph Hellwig #define EXT4_DIRTY_FL 0x00000100 3853dcf5451SChristoph Hellwig #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 3863dcf5451SChristoph Hellwig #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ 3873edc18d8STheodore Ts'o /* nb: was previously EXT2_ECOMPR_FL */ 3883edc18d8STheodore Ts'o #define EXT4_ENCRYPT_FL 0x00000800 /* encrypted file */ 3893dcf5451SChristoph Hellwig /* End compression flags --- maybe not all used */ 3903dcf5451SChristoph Hellwig #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ 3913dcf5451SChristoph Hellwig #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ 3923dcf5451SChristoph Hellwig #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ 3933dcf5451SChristoph Hellwig #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 3943dcf5451SChristoph Hellwig #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ 3953dcf5451SChristoph Hellwig #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 3963dcf5451SChristoph Hellwig #define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ 3973dcf5451SChristoph Hellwig #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ 398f710b4b9STheodore Ts'o #define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ 399c8d46e41SJiaying Zhang #define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */ 40067cf5b09STao Ma #define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */ 4018b4953e1STheodore Ts'o #define EXT4_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ 4023dcf5451SChristoph Hellwig #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ 4033dcf5451SChristoph Hellwig 404040cb378SLi Xi #define EXT4_FL_USER_VISIBLE 0x304BDFFF /* User visible flags */ 405f8011d93SJan Kara #define EXT4_FL_USER_MODIFIABLE 0x204BC0FF /* User modifiable flags */ 4063dcf5451SChristoph Hellwig 407d14e7683SJan Kara /* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */ 4089b7365fcSLi Xi #define EXT4_FL_XFLAG_VISIBLE (EXT4_SYNC_FL | \ 4099b7365fcSLi Xi EXT4_IMMUTABLE_FL | \ 4109b7365fcSLi Xi EXT4_APPEND_FL | \ 4119b7365fcSLi Xi EXT4_NODUMP_FL | \ 4129b7365fcSLi Xi EXT4_NOATIME_FL | \ 4139b7365fcSLi Xi EXT4_PROJINHERIT_FL) 4149b7365fcSLi Xi 4158fa43a81SDuane Griffin /* Flags that should be inherited by new inodes from their parent. */ 4168fa43a81SDuane Griffin #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\ 4171cd9f097STheodore Ts'o EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\ 4188fa43a81SDuane Griffin EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\ 419040cb378SLi Xi EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL |\ 420040cb378SLi Xi EXT4_PROJINHERIT_FL) 4218fa43a81SDuane Griffin 4222dc6b0d4SDuane Griffin /* Flags that are appropriate for regular files (all but dir-specific ones). */ 4232dc6b0d4SDuane Griffin #define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL)) 4242dc6b0d4SDuane Griffin 4252dc6b0d4SDuane Griffin /* Flags that are appropriate for non-directories/regular files. */ 4262dc6b0d4SDuane Griffin #define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL) 4272dc6b0d4SDuane Griffin 4282dc6b0d4SDuane Griffin /* Mask out flags that are inappropriate for the given type of inode. */ 4292dc6b0d4SDuane Griffin static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags) 4302dc6b0d4SDuane Griffin { 4312dc6b0d4SDuane Griffin if (S_ISDIR(mode)) 4322dc6b0d4SDuane Griffin return flags; 4332dc6b0d4SDuane Griffin else if (S_ISREG(mode)) 4342dc6b0d4SDuane Griffin return flags & EXT4_REG_FLMASK; 4352dc6b0d4SDuane Griffin else 4362dc6b0d4SDuane Griffin return flags & EXT4_OTHER_FLMASK; 4372dc6b0d4SDuane Griffin } 4382dc6b0d4SDuane Griffin 43912e9b892SDmitry Monakhov /* 44012e9b892SDmitry Monakhov * Inode flags used for atomic set/get 44112e9b892SDmitry Monakhov */ 44212e9b892SDmitry Monakhov enum { 44312e9b892SDmitry Monakhov EXT4_INODE_SECRM = 0, /* Secure deletion */ 44412e9b892SDmitry Monakhov EXT4_INODE_UNRM = 1, /* Undelete */ 44512e9b892SDmitry Monakhov EXT4_INODE_COMPR = 2, /* Compress file */ 44612e9b892SDmitry Monakhov EXT4_INODE_SYNC = 3, /* Synchronous updates */ 44712e9b892SDmitry Monakhov EXT4_INODE_IMMUTABLE = 4, /* Immutable file */ 44812e9b892SDmitry Monakhov EXT4_INODE_APPEND = 5, /* writes to file may only append */ 44912e9b892SDmitry Monakhov EXT4_INODE_NODUMP = 6, /* do not dump file */ 45012e9b892SDmitry Monakhov EXT4_INODE_NOATIME = 7, /* do not update atime */ 45112e9b892SDmitry Monakhov /* Reserved for compression usage... */ 45212e9b892SDmitry Monakhov EXT4_INODE_DIRTY = 8, 45312e9b892SDmitry Monakhov EXT4_INODE_COMPRBLK = 9, /* One or more compressed clusters */ 45412e9b892SDmitry Monakhov EXT4_INODE_NOCOMPR = 10, /* Don't compress */ 455f542fbe8STheodore Ts'o EXT4_INODE_ENCRYPT = 11, /* Encrypted file */ 45612e9b892SDmitry Monakhov /* End compression flags --- maybe not all used */ 45712e9b892SDmitry Monakhov EXT4_INODE_INDEX = 12, /* hash-indexed directory */ 45812e9b892SDmitry Monakhov EXT4_INODE_IMAGIC = 13, /* AFS directory */ 45912e9b892SDmitry Monakhov EXT4_INODE_JOURNAL_DATA = 14, /* file data should be journaled */ 46012e9b892SDmitry Monakhov EXT4_INODE_NOTAIL = 15, /* file tail should not be merged */ 46112e9b892SDmitry Monakhov EXT4_INODE_DIRSYNC = 16, /* dirsync behaviour (directories only) */ 46212e9b892SDmitry Monakhov EXT4_INODE_TOPDIR = 17, /* Top of directory hierarchies*/ 46312e9b892SDmitry Monakhov EXT4_INODE_HUGE_FILE = 18, /* Set to each huge file */ 46412e9b892SDmitry Monakhov EXT4_INODE_EXTENTS = 19, /* Inode uses extents */ 46512e9b892SDmitry Monakhov EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */ 46612e9b892SDmitry Monakhov EXT4_INODE_EOFBLOCKS = 22, /* Blocks allocated beyond EOF */ 46767cf5b09STao Ma EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */ 4688b4953e1STheodore Ts'o EXT4_INODE_PROJINHERIT = 29, /* Create with parents projid */ 46912e9b892SDmitry Monakhov EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */ 47012e9b892SDmitry Monakhov }; 47112e9b892SDmitry Monakhov 47212e9b892SDmitry Monakhov /* 4739a4c8019SCarlos Maiolino * Since it's pretty easy to mix up bit numbers and hex values, we use a 4749a4c8019SCarlos Maiolino * build-time check to make sure that EXT4_XXX_FL is consistent with respect to 4759a4c8019SCarlos Maiolino * EXT4_INODE_XXX. If all is well, the macros will be dropped, so, it won't cost 4769a4c8019SCarlos Maiolino * any extra space in the compiled kernel image, otherwise, the build will fail. 4779a4c8019SCarlos Maiolino * It's important that these values are the same, since we are using 4789a4c8019SCarlos Maiolino * EXT4_INODE_XXX to test for flag values, but EXT4_XXX_FL must be consistent 4799a4c8019SCarlos Maiolino * with the values of FS_XXX_FL defined in include/linux/fs.h and the on-disk 4809a4c8019SCarlos Maiolino * values found in ext2, ext3 and ext4 filesystems, and of course the values 4819a4c8019SCarlos Maiolino * defined in e2fsprogs. 48212e9b892SDmitry Monakhov * 48312e9b892SDmitry Monakhov * It's not paranoia if the Murphy's Law really *is* out to get you. :-) 48412e9b892SDmitry Monakhov */ 4859a4c8019SCarlos Maiolino #define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG)) 4869a4c8019SCarlos Maiolino #define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG)) 4879a4c8019SCarlos Maiolino 48812e9b892SDmitry Monakhov static inline void ext4_check_flag_values(void) 48912e9b892SDmitry Monakhov { 49012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SECRM); 49112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(UNRM); 49212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPR); 49312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SYNC); 49412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMMUTABLE); 49512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(APPEND); 49612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NODUMP); 49712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOATIME); 49812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRTY); 49912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPRBLK); 50012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOCOMPR); 5013edc18d8STheodore Ts'o CHECK_FLAG_VALUE(ENCRYPT); 50212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(INDEX); 50312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMAGIC); 50412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(JOURNAL_DATA); 50512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOTAIL); 50612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRSYNC); 50712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(TOPDIR); 50812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(HUGE_FILE); 50912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EXTENTS); 51012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EA_INODE); 51112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EOFBLOCKS); 51267cf5b09STao Ma CHECK_FLAG_VALUE(INLINE_DATA); 5138b4953e1STheodore Ts'o CHECK_FLAG_VALUE(PROJINHERIT); 51412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(RESERVED); 51512e9b892SDmitry Monakhov } 51612e9b892SDmitry Monakhov 5173dcf5451SChristoph Hellwig /* Used to pass group descriptor data when online resize is done */ 5183dcf5451SChristoph Hellwig struct ext4_new_group_input { 5193dcf5451SChristoph Hellwig __u32 group; /* Group number for this data */ 5203dcf5451SChristoph Hellwig __u64 block_bitmap; /* Absolute block number of block bitmap */ 5213dcf5451SChristoph Hellwig __u64 inode_bitmap; /* Absolute block number of inode bitmap */ 5223dcf5451SChristoph Hellwig __u64 inode_table; /* Absolute block number of inode table start */ 5233dcf5451SChristoph Hellwig __u32 blocks_count; /* Total number of blocks in this group */ 5243dcf5451SChristoph Hellwig __u16 reserved_blocks; /* Number of reserved blocks in this group */ 5253dcf5451SChristoph Hellwig __u16 unused; 5263dcf5451SChristoph Hellwig }; 5273dcf5451SChristoph Hellwig 5284d92dc0fSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 5294d92dc0fSBen Hutchings struct compat_ext4_new_group_input { 5304d92dc0fSBen Hutchings u32 group; 5314d92dc0fSBen Hutchings compat_u64 block_bitmap; 5324d92dc0fSBen Hutchings compat_u64 inode_bitmap; 5334d92dc0fSBen Hutchings compat_u64 inode_table; 5344d92dc0fSBen Hutchings u32 blocks_count; 5354d92dc0fSBen Hutchings u16 reserved_blocks; 5364d92dc0fSBen Hutchings u16 unused; 5374d92dc0fSBen Hutchings }; 5384d92dc0fSBen Hutchings #endif 5394d92dc0fSBen Hutchings 5403dcf5451SChristoph Hellwig /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ 5413dcf5451SChristoph Hellwig struct ext4_new_group_data { 5423dcf5451SChristoph Hellwig __u32 group; 5433dcf5451SChristoph Hellwig __u64 block_bitmap; 5443dcf5451SChristoph Hellwig __u64 inode_bitmap; 5453dcf5451SChristoph Hellwig __u64 inode_table; 5463dcf5451SChristoph Hellwig __u32 blocks_count; 5473dcf5451SChristoph Hellwig __u16 reserved_blocks; 5483dcf5451SChristoph Hellwig __u16 unused; 5493dcf5451SChristoph Hellwig __u32 free_blocks_count; 5503dcf5451SChristoph Hellwig }; 5513dcf5451SChristoph Hellwig 55233afdcc5SYongqiang Yang /* Indexes used to index group tables in ext4_new_group_data */ 55333afdcc5SYongqiang Yang enum { 55433afdcc5SYongqiang Yang BLOCK_BITMAP = 0, /* block bitmap */ 55533afdcc5SYongqiang Yang INODE_BITMAP, /* inode bitmap */ 55633afdcc5SYongqiang Yang INODE_TABLE, /* inode tables */ 55733afdcc5SYongqiang Yang GROUP_TABLE_COUNT, 55833afdcc5SYongqiang Yang }; 55933afdcc5SYongqiang Yang 5603dcf5451SChristoph Hellwig /* 56179e83036SEric Sandeen * Flags used by ext4_map_blocks() 5623dcf5451SChristoph Hellwig */ 563556615dcSLukas Czerner /* Allocate any needed blocks and/or convert an unwritten 564c2177057STheodore Ts'o extent to be an initialized ext4 */ 5652ac3b6e0STheodore Ts'o #define EXT4_GET_BLOCKS_CREATE 0x0001 566556615dcSLukas Czerner /* Request the creation of an unwritten extent */ 567556615dcSLukas Czerner #define EXT4_GET_BLOCKS_UNWRIT_EXT 0x0002 568556615dcSLukas Czerner #define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT (EXT4_GET_BLOCKS_UNWRIT_EXT|\ 569c2177057STheodore Ts'o EXT4_GET_BLOCKS_CREATE) 57027dd4385SLukas Czerner /* Caller is from the delayed allocation writeout path 57127dd4385SLukas Czerner * finally doing the actual allocation of delayed blocks */ 57203f5d8bcSJan Kara #define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004 5730031462bSMingming Cao /* caller is from the direct IO path, request to creation of an 574556615dcSLukas Czerner unwritten extents if not allocated, split the unwritten 5750031462bSMingming Cao extent if blocks has been preallocated already*/ 576c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_PRE_IO 0x0008 5771296cc85SAneesh Kumar K.V #define EXT4_GET_BLOCKS_CONVERT 0x0010 578c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\ 579556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 580c7064ef1SJiaying Zhang /* Convert extent to initialized after IO complete */ 581c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\ 582556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 58327dd4385SLukas Czerner /* Eventual metadata allocation (due to growing extent tree) 58427dd4385SLukas Czerner * should not fail, so try to use reserved blocks for that.*/ 58527dd4385SLukas Czerner #define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020 586556b27abSVivek Haldar /* Don't normalize allocation size (used for fallocate) */ 587556b27abSVivek Haldar #define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040 588a4e5d88bSDmitry Monakhov /* Request will not result in inode size update (user for fallocate) */ 589a4e5d88bSDmitry Monakhov #define EXT4_GET_BLOCKS_KEEP_SIZE 0x0080 590b8a86845SLukas Czerner /* Convert written extents to unwritten */ 5912dcba478SJan Kara #define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN 0x0100 592c86d8db3SJan Kara /* Write zeros to newly created written extents */ 593c86d8db3SJan Kara #define EXT4_GET_BLOCKS_ZERO 0x0200 594c86d8db3SJan Kara #define EXT4_GET_BLOCKS_CREATE_ZERO (EXT4_GET_BLOCKS_CREATE |\ 595c86d8db3SJan Kara EXT4_GET_BLOCKS_ZERO) 596ee0876bcSJan Kara /* Caller will submit data before dropping transaction handle. This 597ee0876bcSJan Kara * allows jbd2 to avoid submitting data before commit. */ 598ee0876bcSJan Kara #define EXT4_GET_BLOCKS_IO_SUBMIT 0x0400 5993dcf5451SChristoph Hellwig 6003dcf5451SChristoph Hellwig /* 6017869a4a6STheodore Ts'o * The bit position of these flags must not overlap with any of the 602ed8a1a76STheodore Ts'o * EXT4_GET_BLOCKS_*. They are used by ext4_find_extent(), 603107a7bd3STheodore Ts'o * read_extent_tree_block(), ext4_split_extent_at(), 6047869a4a6STheodore Ts'o * ext4_ext_insert_extent(), and ext4_ext_create_new_leaf(). 6057869a4a6STheodore Ts'o * EXT4_EX_NOCACHE is used to indicate that the we shouldn't be 6067869a4a6STheodore Ts'o * caching the extents when reading from the extent tree while a 6077869a4a6STheodore Ts'o * truncate or punch hole operation is in progress. 608107a7bd3STheodore Ts'o */ 609d26e2c4dSTheodore Ts'o #define EXT4_EX_NOCACHE 0x40000000 610d26e2c4dSTheodore Ts'o #define EXT4_EX_FORCE_CACHE 0x20000000 611107a7bd3STheodore Ts'o 612107a7bd3STheodore Ts'o /* 613e6362609STheodore Ts'o * Flags used by ext4_free_blocks 614e6362609STheodore Ts'o */ 615e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_METADATA 0x0001 616e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_FORGET 0x0002 6171f2acb60STheodore Ts'o #define EXT4_FREE_BLOCKS_VALIDATED 0x0004 6187132de74SMaxim Patlasov #define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008 61984130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010 62084130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020 621e6362609STheodore Ts'o 622e6362609STheodore Ts'o /* 6233dcf5451SChristoph Hellwig * ioctl commands 6243dcf5451SChristoph Hellwig */ 6253dcf5451SChristoph Hellwig #define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS 6263dcf5451SChristoph Hellwig #define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS 6273dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION _IOR('f', 3, long) 6283dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION _IOW('f', 4, long) 6293dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION 6303dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION 6313dcf5451SChristoph Hellwig #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) 6323dcf5451SChristoph Hellwig #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) 6338eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) 6348eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) 6358eea80d5STheodore Ts'o #define EXT4_IOC_MIGRATE _IO('f', 9) 636ccd2506bSTheodore Ts'o /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */ 6378eea80d5STheodore Ts'o /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ 638ccd2506bSTheodore Ts'o #define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12) 639748de673SAkira Fujita #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent) 64019c5246dSYongqiang Yang #define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) 641393d1d1dSDr. Tilmann Bubeck #define EXT4_IOC_SWAP_BOOT _IO('f', 17) 6427869a4a6STheodore Ts'o #define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18) 643a7550b30SJaegeuk Kim #define EXT4_IOC_SET_ENCRYPTION_POLICY FS_IOC_SET_ENCRYPTION_POLICY 644a7550b30SJaegeuk Kim #define EXT4_IOC_GET_ENCRYPTION_PWSALT FS_IOC_GET_ENCRYPTION_PWSALT 645a7550b30SJaegeuk Kim #define EXT4_IOC_GET_ENCRYPTION_POLICY FS_IOC_GET_ENCRYPTION_POLICY 6463dcf5451SChristoph Hellwig 6479b7365fcSLi Xi #ifndef FS_IOC_FSGETXATTR 6489b7365fcSLi Xi /* Until the uapi changes get merged for project quota... */ 6499b7365fcSLi Xi 6509b7365fcSLi Xi #define FS_IOC_FSGETXATTR _IOR('X', 31, struct fsxattr) 6519b7365fcSLi Xi #define FS_IOC_FSSETXATTR _IOW('X', 32, struct fsxattr) 6529b7365fcSLi Xi 6539b7365fcSLi Xi /* 6549b7365fcSLi Xi * Structure for FS_IOC_FSGETXATTR and FS_IOC_FSSETXATTR. 6559b7365fcSLi Xi */ 6569b7365fcSLi Xi struct fsxattr { 6579b7365fcSLi Xi __u32 fsx_xflags; /* xflags field value (get/set) */ 6589b7365fcSLi Xi __u32 fsx_extsize; /* extsize field value (get/set)*/ 6599b7365fcSLi Xi __u32 fsx_nextents; /* nextents field value (get) */ 6609b7365fcSLi Xi __u32 fsx_projid; /* project identifier (get/set) */ 6619b7365fcSLi Xi unsigned char fsx_pad[12]; 6629b7365fcSLi Xi }; 6639b7365fcSLi Xi 6649b7365fcSLi Xi /* 6659b7365fcSLi Xi * Flags for the fsx_xflags field 6669b7365fcSLi Xi */ 6679b7365fcSLi Xi #define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */ 6689b7365fcSLi Xi #define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */ 6699b7365fcSLi Xi #define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */ 6709b7365fcSLi Xi #define FS_XFLAG_APPEND 0x00000010 /* all writes append */ 6719b7365fcSLi Xi #define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */ 6729b7365fcSLi Xi #define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */ 6739b7365fcSLi Xi #define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */ 6749b7365fcSLi Xi #define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */ 6759b7365fcSLi Xi #define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */ 6769b7365fcSLi Xi #define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */ 6779b7365fcSLi Xi #define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */ 6789b7365fcSLi Xi #define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */ 6799b7365fcSLi Xi #define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */ 6809b7365fcSLi Xi #define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ 6819b7365fcSLi Xi #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ 6829b7365fcSLi Xi #endif /* !defined(FS_IOC_FSGETXATTR) */ 6839b7365fcSLi Xi 6849b7365fcSLi Xi #define EXT4_IOC_FSGETXATTR FS_IOC_FSGETXATTR 6859b7365fcSLi Xi #define EXT4_IOC_FSSETXATTR FS_IOC_FSSETXATTR 6869b7365fcSLi Xi 687e9be2ac7STheodore Ts'o #define EXT4_IOC_SHUTDOWN _IOR ('X', 125, __u32) 688783d9485STheodore Ts'o 689783d9485STheodore Ts'o /* 690783d9485STheodore Ts'o * Flags for going down operation 691783d9485STheodore Ts'o */ 692783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_DEFAULT 0x0 /* going down */ 693783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */ 694783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */ 695783d9485STheodore Ts'o 696783d9485STheodore Ts'o 697899ad0ceSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 6983dcf5451SChristoph Hellwig /* 6993dcf5451SChristoph Hellwig * ioctl commands in 32 bit emulation 7003dcf5451SChristoph Hellwig */ 7013dcf5451SChristoph Hellwig #define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS 7023dcf5451SChristoph Hellwig #define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS 7033dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) 7043dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) 7053dcf5451SChristoph Hellwig #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) 7063dcf5451SChristoph Hellwig #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) 7073dcf5451SChristoph Hellwig #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) 7084d92dc0fSBen Hutchings #define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input) 7093dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION 7103dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION 711899ad0ceSBen Hutchings #endif 7123dcf5451SChristoph Hellwig 713b595076aSUwe Kleine-König /* Max physical block we can address w/o extents */ 714fb0a387dSEric Sandeen #define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF 715fb0a387dSEric Sandeen 7163dcf5451SChristoph Hellwig /* 7173dcf5451SChristoph Hellwig * Structure of an inode on the disk 7183dcf5451SChristoph Hellwig */ 7193dcf5451SChristoph Hellwig struct ext4_inode { 7203dcf5451SChristoph Hellwig __le16 i_mode; /* File mode */ 7213dcf5451SChristoph Hellwig __le16 i_uid; /* Low 16 bits of Owner Uid */ 7223dcf5451SChristoph Hellwig __le32 i_size_lo; /* Size in bytes */ 7233dcf5451SChristoph Hellwig __le32 i_atime; /* Access time */ 7243dcf5451SChristoph Hellwig __le32 i_ctime; /* Inode Change time */ 7253dcf5451SChristoph Hellwig __le32 i_mtime; /* Modification time */ 7263dcf5451SChristoph Hellwig __le32 i_dtime; /* Deletion Time */ 7273dcf5451SChristoph Hellwig __le16 i_gid; /* Low 16 bits of Group Id */ 7283dcf5451SChristoph Hellwig __le16 i_links_count; /* Links count */ 7293dcf5451SChristoph Hellwig __le32 i_blocks_lo; /* Blocks count */ 7303dcf5451SChristoph Hellwig __le32 i_flags; /* File flags */ 7313dcf5451SChristoph Hellwig union { 7323dcf5451SChristoph Hellwig struct { 7333dcf5451SChristoph Hellwig __le32 l_i_version; 7343dcf5451SChristoph Hellwig } linux1; 7353dcf5451SChristoph Hellwig struct { 7363dcf5451SChristoph Hellwig __u32 h_i_translator; 7373dcf5451SChristoph Hellwig } hurd1; 7383dcf5451SChristoph Hellwig struct { 7393dcf5451SChristoph Hellwig __u32 m_i_reserved1; 7403dcf5451SChristoph Hellwig } masix1; 7413dcf5451SChristoph Hellwig } osd1; /* OS dependent 1 */ 7423dcf5451SChristoph Hellwig __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ 7433dcf5451SChristoph Hellwig __le32 i_generation; /* File version (for NFS) */ 7443dcf5451SChristoph Hellwig __le32 i_file_acl_lo; /* File ACL */ 7453dcf5451SChristoph Hellwig __le32 i_size_high; 7463dcf5451SChristoph Hellwig __le32 i_obso_faddr; /* Obsoleted fragment address */ 7473dcf5451SChristoph Hellwig union { 7483dcf5451SChristoph Hellwig struct { 7493dcf5451SChristoph Hellwig __le16 l_i_blocks_high; /* were l_i_reserved1 */ 7503dcf5451SChristoph Hellwig __le16 l_i_file_acl_high; 7513dcf5451SChristoph Hellwig __le16 l_i_uid_high; /* these 2 fields */ 7523dcf5451SChristoph Hellwig __le16 l_i_gid_high; /* were reserved2[0] */ 753e6153918SDarrick J. Wong __le16 l_i_checksum_lo;/* crc32c(uuid+inum+inode) LE */ 754e6153918SDarrick J. Wong __le16 l_i_reserved; 7553dcf5451SChristoph Hellwig } linux2; 7563dcf5451SChristoph Hellwig struct { 7573dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 7583dcf5451SChristoph Hellwig __u16 h_i_mode_high; 7593dcf5451SChristoph Hellwig __u16 h_i_uid_high; 7603dcf5451SChristoph Hellwig __u16 h_i_gid_high; 7613dcf5451SChristoph Hellwig __u32 h_i_author; 7623dcf5451SChristoph Hellwig } hurd2; 7633dcf5451SChristoph Hellwig struct { 7643dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 7653dcf5451SChristoph Hellwig __le16 m_i_file_acl_high; 7663dcf5451SChristoph Hellwig __u32 m_i_reserved2[2]; 7673dcf5451SChristoph Hellwig } masix2; 7683dcf5451SChristoph Hellwig } osd2; /* OS dependent 2 */ 7693dcf5451SChristoph Hellwig __le16 i_extra_isize; 770e6153918SDarrick J. Wong __le16 i_checksum_hi; /* crc32c(uuid+inum+inode) BE */ 7713dcf5451SChristoph Hellwig __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ 7723dcf5451SChristoph Hellwig __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ 7733dcf5451SChristoph Hellwig __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ 7743dcf5451SChristoph Hellwig __le32 i_crtime; /* File Creation time */ 7753dcf5451SChristoph Hellwig __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ 7763dcf5451SChristoph Hellwig __le32 i_version_hi; /* high 32 bits for 64-bit version */ 7778b4953e1STheodore Ts'o __le32 i_projid; /* Project ID */ 7783dcf5451SChristoph Hellwig }; 7793dcf5451SChristoph Hellwig 780748de673SAkira Fujita struct move_extent { 781748de673SAkira Fujita __u32 reserved; /* should be zero */ 782748de673SAkira Fujita __u32 donor_fd; /* donor file descriptor */ 783748de673SAkira Fujita __u64 orig_start; /* logical start offset in block for orig */ 784748de673SAkira Fujita __u64 donor_start; /* logical start offset in block for donor */ 785748de673SAkira Fujita __u64 len; /* block length to be moved */ 786748de673SAkira Fujita __u64 moved_len; /* moved block length */ 787748de673SAkira Fujita }; 7883dcf5451SChristoph Hellwig 7893dcf5451SChristoph Hellwig #define EXT4_EPOCH_BITS 2 7903dcf5451SChristoph Hellwig #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) 7913dcf5451SChristoph Hellwig #define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) 7923dcf5451SChristoph Hellwig 7933dcf5451SChristoph Hellwig /* 7943dcf5451SChristoph Hellwig * Extended fields will fit into an inode if the filesystem was formatted 7953dcf5451SChristoph Hellwig * with large inodes (-I 256 or larger) and there are not currently any EAs 7963dcf5451SChristoph Hellwig * consuming all of the available space. For new inodes we always reserve 7973dcf5451SChristoph Hellwig * enough space for the kernel's known extended fields, but for inodes 7983dcf5451SChristoph Hellwig * created with an old kernel this might not have been the case. None of 7993dcf5451SChristoph Hellwig * the extended inode fields is critical for correct filesystem operation. 8003dcf5451SChristoph Hellwig * This macro checks if a certain field fits in the inode. Note that 8013dcf5451SChristoph Hellwig * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize 8023dcf5451SChristoph Hellwig */ 8033dcf5451SChristoph Hellwig #define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \ 8043dcf5451SChristoph Hellwig ((offsetof(typeof(*ext4_inode), field) + \ 8053dcf5451SChristoph Hellwig sizeof((ext4_inode)->field)) \ 8063dcf5451SChristoph Hellwig <= (EXT4_GOOD_OLD_INODE_SIZE + \ 8073dcf5451SChristoph Hellwig (einode)->i_extra_isize)) \ 8083dcf5451SChristoph Hellwig 809a4dad1aeSDavid Turner /* 810a4dad1aeSDavid Turner * We use an encoding that preserves the times for extra epoch "00": 811a4dad1aeSDavid Turner * 812a4dad1aeSDavid Turner * extra msb of adjust for signed 813a4dad1aeSDavid Turner * epoch 32-bit 32-bit tv_sec to 814a4dad1aeSDavid Turner * bits time decoded 64-bit tv_sec 64-bit tv_sec valid time range 815a4dad1aeSDavid Turner * 0 0 1 -0x80000000..-0x00000001 0x000000000 1901-12-13..1969-12-31 816a4dad1aeSDavid Turner * 0 0 0 0x000000000..0x07fffffff 0x000000000 1970-01-01..2038-01-19 817a4dad1aeSDavid Turner * 0 1 1 0x080000000..0x0ffffffff 0x100000000 2038-01-19..2106-02-07 818a4dad1aeSDavid Turner * 0 1 0 0x100000000..0x17fffffff 0x100000000 2106-02-07..2174-02-25 819a4dad1aeSDavid Turner * 1 0 1 0x180000000..0x1ffffffff 0x200000000 2174-02-25..2242-03-16 820a4dad1aeSDavid Turner * 1 0 0 0x200000000..0x27fffffff 0x200000000 2242-03-16..2310-04-04 821a4dad1aeSDavid Turner * 1 1 1 0x280000000..0x2ffffffff 0x300000000 2310-04-04..2378-04-22 822a4dad1aeSDavid Turner * 1 1 0 0x300000000..0x37fffffff 0x300000000 2378-04-22..2446-05-10 823a4dad1aeSDavid Turner * 824a4dad1aeSDavid Turner * Note that previous versions of the kernel on 64-bit systems would 825a4dad1aeSDavid Turner * incorrectly use extra epoch bits 1,1 for dates between 1901 and 826a4dad1aeSDavid Turner * 1970. e2fsck will correct this, assuming that it is run on the 827a4dad1aeSDavid Turner * affected filesystem before 2242. 828a4dad1aeSDavid Turner */ 829a4dad1aeSDavid Turner 8303dcf5451SChristoph Hellwig static inline __le32 ext4_encode_extra_time(struct timespec *time) 8313dcf5451SChristoph Hellwig { 832a4dad1aeSDavid Turner u32 extra = sizeof(time->tv_sec) > 4 ? 833a4dad1aeSDavid Turner ((time->tv_sec - (s32)time->tv_sec) >> 32) & EXT4_EPOCH_MASK : 0; 834a4dad1aeSDavid Turner return cpu_to_le32(extra | (time->tv_nsec << EXT4_EPOCH_BITS)); 8353dcf5451SChristoph Hellwig } 8363dcf5451SChristoph Hellwig 8373dcf5451SChristoph Hellwig static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra) 8383dcf5451SChristoph Hellwig { 839a4dad1aeSDavid Turner if (unlikely(sizeof(time->tv_sec) > 4 && 840a4dad1aeSDavid Turner (extra & cpu_to_le32(EXT4_EPOCH_MASK)))) { 841a4dad1aeSDavid Turner #if LINUX_VERSION_CODE < KERNEL_VERSION(4,20,0) 842a4dad1aeSDavid Turner /* Handle legacy encoding of pre-1970 dates with epoch 843a4dad1aeSDavid Turner * bits 1,1. We assume that by kernel version 4.20, 844a4dad1aeSDavid Turner * everyone will have run fsck over the affected 845a4dad1aeSDavid Turner * filesystems to correct the problem. (This 846a4dad1aeSDavid Turner * backwards compatibility may be removed before this 847a4dad1aeSDavid Turner * time, at the discretion of the ext4 developers.) 848a4dad1aeSDavid Turner */ 849a4dad1aeSDavid Turner u64 extra_bits = le32_to_cpu(extra) & EXT4_EPOCH_MASK; 850a4dad1aeSDavid Turner if (extra_bits == 3 && ((time->tv_sec) & 0x80000000) != 0) 851a4dad1aeSDavid Turner extra_bits = 0; 852a4dad1aeSDavid Turner time->tv_sec += extra_bits << 32; 853a4dad1aeSDavid Turner #else 854a4dad1aeSDavid Turner time->tv_sec += (u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32; 855a4dad1aeSDavid Turner #endif 856a4dad1aeSDavid Turner } 857c1fccc06STheodore Ts'o time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; 8583dcf5451SChristoph Hellwig } 8593dcf5451SChristoph Hellwig 8603dcf5451SChristoph Hellwig #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ 8613dcf5451SChristoph Hellwig do { \ 8623dcf5451SChristoph Hellwig (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ 8633dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ 8643dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 8653dcf5451SChristoph Hellwig ext4_encode_extra_time(&(inode)->xtime); \ 8663dcf5451SChristoph Hellwig } while (0) 8673dcf5451SChristoph Hellwig 8683dcf5451SChristoph Hellwig #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ 8693dcf5451SChristoph Hellwig do { \ 8703dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 8713dcf5451SChristoph Hellwig (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \ 8723dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 8733dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 8743dcf5451SChristoph Hellwig ext4_encode_extra_time(&(einode)->xtime); \ 8753dcf5451SChristoph Hellwig } while (0) 8763dcf5451SChristoph Hellwig 8773dcf5451SChristoph Hellwig #define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \ 8783dcf5451SChristoph Hellwig do { \ 8793dcf5451SChristoph Hellwig (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \ 8803dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ 8813dcf5451SChristoph Hellwig ext4_decode_extra_time(&(inode)->xtime, \ 8823dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 883af0b44a1SEric Sandeen else \ 884af0b44a1SEric Sandeen (inode)->xtime.tv_nsec = 0; \ 8853dcf5451SChristoph Hellwig } while (0) 8863dcf5451SChristoph Hellwig 8873dcf5451SChristoph Hellwig #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ 8883dcf5451SChristoph Hellwig do { \ 8893dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 8903dcf5451SChristoph Hellwig (einode)->xtime.tv_sec = \ 8913dcf5451SChristoph Hellwig (signed)le32_to_cpu((raw_inode)->xtime); \ 89219ea8060STheodore Ts'o else \ 89319ea8060STheodore Ts'o (einode)->xtime.tv_sec = 0; \ 8943dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 8953dcf5451SChristoph Hellwig ext4_decode_extra_time(&(einode)->xtime, \ 8963dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 897af0b44a1SEric Sandeen else \ 898af0b44a1SEric Sandeen (einode)->xtime.tv_nsec = 0; \ 8993dcf5451SChristoph Hellwig } while (0) 9003dcf5451SChristoph Hellwig 9013dcf5451SChristoph Hellwig #define i_disk_version osd1.linux1.l_i_version 9023dcf5451SChristoph Hellwig 9033dcf5451SChristoph Hellwig #if defined(__KERNEL__) || defined(__linux__) 9043dcf5451SChristoph Hellwig #define i_reserved1 osd1.linux1.l_i_reserved1 9053dcf5451SChristoph Hellwig #define i_file_acl_high osd2.linux2.l_i_file_acl_high 9063dcf5451SChristoph Hellwig #define i_blocks_high osd2.linux2.l_i_blocks_high 9073dcf5451SChristoph Hellwig #define i_uid_low i_uid 9083dcf5451SChristoph Hellwig #define i_gid_low i_gid 9093dcf5451SChristoph Hellwig #define i_uid_high osd2.linux2.l_i_uid_high 9103dcf5451SChristoph Hellwig #define i_gid_high osd2.linux2.l_i_gid_high 911e6153918SDarrick J. Wong #define i_checksum_lo osd2.linux2.l_i_checksum_lo 9123dcf5451SChristoph Hellwig 9133dcf5451SChristoph Hellwig #elif defined(__GNU__) 9143dcf5451SChristoph Hellwig 9153dcf5451SChristoph Hellwig #define i_translator osd1.hurd1.h_i_translator 9163dcf5451SChristoph Hellwig #define i_uid_high osd2.hurd2.h_i_uid_high 9173dcf5451SChristoph Hellwig #define i_gid_high osd2.hurd2.h_i_gid_high 9183dcf5451SChristoph Hellwig #define i_author osd2.hurd2.h_i_author 9193dcf5451SChristoph Hellwig 9203dcf5451SChristoph Hellwig #elif defined(__masix__) 9213dcf5451SChristoph Hellwig 9223dcf5451SChristoph Hellwig #define i_reserved1 osd1.masix1.m_i_reserved1 9233dcf5451SChristoph Hellwig #define i_file_acl_high osd2.masix2.m_i_file_acl_high 9243dcf5451SChristoph Hellwig #define i_reserved2 osd2.masix2.m_i_reserved2 9253dcf5451SChristoph Hellwig 9263dcf5451SChristoph Hellwig #endif /* defined(__KERNEL__) || defined(__linux__) */ 9273dcf5451SChristoph Hellwig 928c0677e6dSZheng Liu #include "extents_status.h" 929c0677e6dSZheng Liu 930d444c3c3STheodore Ts'o /* 931daf647d2STheodore Ts'o * Lock subclasses for i_data_sem in the ext4_inode_info structure. 932daf647d2STheodore Ts'o * 933daf647d2STheodore Ts'o * These are needed to avoid lockdep false positives when we need to 934daf647d2STheodore Ts'o * allocate blocks to the quota inode during ext4_map_blocks(), while 935daf647d2STheodore Ts'o * holding i_data_sem for a normal (non-quota) inode. Since we don't 936daf647d2STheodore Ts'o * do quota tracking for the quota inode, this avoids deadlock (as 937daf647d2STheodore Ts'o * well as infinite recursion, since it isn't turtles all the way 938daf647d2STheodore Ts'o * down...) 939daf647d2STheodore Ts'o * 940daf647d2STheodore Ts'o * I_DATA_SEM_NORMAL - Used for most inodes 941daf647d2STheodore Ts'o * I_DATA_SEM_OTHER - Used by move_inode.c for the second normal inode 942daf647d2STheodore Ts'o * where the second inode has larger inode number 943daf647d2STheodore Ts'o * than the first 944daf647d2STheodore Ts'o * I_DATA_SEM_QUOTA - Used for quota inodes only 945daf647d2STheodore Ts'o */ 946daf647d2STheodore Ts'o enum { 947daf647d2STheodore Ts'o I_DATA_SEM_NORMAL = 0, 948daf647d2STheodore Ts'o I_DATA_SEM_OTHER, 949daf647d2STheodore Ts'o I_DATA_SEM_QUOTA, 950daf647d2STheodore Ts'o }; 951daf647d2STheodore Ts'o 952daf647d2STheodore Ts'o 953daf647d2STheodore Ts'o /* 954d444c3c3STheodore Ts'o * fourth extended file system inode data in memory 955d444c3c3STheodore Ts'o */ 956d444c3c3STheodore Ts'o struct ext4_inode_info { 957d444c3c3STheodore Ts'o __le32 i_data[15]; /* unconverted */ 958d444c3c3STheodore Ts'o __u32 i_dtime; 95912e9b892SDmitry Monakhov ext4_fsblk_t i_file_acl; 960d444c3c3STheodore Ts'o 961d444c3c3STheodore Ts'o /* 962d444c3c3STheodore Ts'o * i_block_group is the number of the block group which contains 963d444c3c3STheodore Ts'o * this file's inode. Constant across the lifetime of the inode, 964d444c3c3STheodore Ts'o * it is ued for making block allocation decisions - we try to 965d444c3c3STheodore Ts'o * place a file's data blocks near its inode block, and new inodes 966d444c3c3STheodore Ts'o * near to their parent directory's inode. 967d444c3c3STheodore Ts'o */ 968d444c3c3STheodore Ts'o ext4_group_t i_block_group; 9698a2005d3STheodore Ts'o ext4_lblk_t i_dir_start_lookup; 970353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 97119f5fb7aSTheodore Ts'o unsigned long i_state_flags; /* Dynamic state flags */ 972353eb83cSTheodore Ts'o #endif 97312e9b892SDmitry Monakhov unsigned long i_flags; 974d444c3c3STheodore Ts'o 975d444c3c3STheodore Ts'o /* 976d444c3c3STheodore Ts'o * Extended attributes can be read independently of the main file 977d444c3c3STheodore Ts'o * data. Taking i_mutex even when reading would cause contention 978d444c3c3STheodore Ts'o * between readers of EAs and writers of regular file data, so 979d444c3c3STheodore Ts'o * instead we synchronize on xattr_sem when reading or changing 980d444c3c3STheodore Ts'o * EAs. 981d444c3c3STheodore Ts'o */ 982d444c3c3STheodore Ts'o struct rw_semaphore xattr_sem; 983d444c3c3STheodore Ts'o 984d444c3c3STheodore Ts'o struct list_head i_orphan; /* unlinked but open inodes */ 985d444c3c3STheodore Ts'o 986d444c3c3STheodore Ts'o /* 987d444c3c3STheodore Ts'o * i_disksize keeps track of what the inode size is ON DISK, not 988d444c3c3STheodore Ts'o * in memory. During truncate, i_size is set to the new size by 989d444c3c3STheodore Ts'o * the VFS prior to calling ext4_truncate(), but the filesystem won't 990d444c3c3STheodore Ts'o * set i_disksize to 0 until the truncate is actually under way. 991d444c3c3STheodore Ts'o * 992d444c3c3STheodore Ts'o * The intent is that i_disksize always represents the blocks which 993d444c3c3STheodore Ts'o * are used by this file. This allows recovery to restart truncate 994d444c3c3STheodore Ts'o * on orphans if we crash during truncate. We actually write i_disksize 995d444c3c3STheodore Ts'o * into the on-disk inode when writing inodes out, instead of i_size. 996d444c3c3STheodore Ts'o * 997d444c3c3STheodore Ts'o * The only time when i_disksize and i_size may be different is when 998d444c3c3STheodore Ts'o * a truncate is in progress. The only things which change i_disksize 999d444c3c3STheodore Ts'o * are ext4_get_block (growth) and ext4_truncate (shrinkth). 1000d444c3c3STheodore Ts'o */ 1001d444c3c3STheodore Ts'o loff_t i_disksize; 1002d444c3c3STheodore Ts'o 1003d444c3c3STheodore Ts'o /* 1004d444c3c3STheodore Ts'o * i_data_sem is for serialising ext4_truncate() against 1005d444c3c3STheodore Ts'o * ext4_getblock(). In the 2.4 ext2 design, great chunks of inode's 1006d444c3c3STheodore Ts'o * data tree are chopped off during truncate. We can't do that in 1007d444c3c3STheodore Ts'o * ext4 because whenever we perform intermediate commits during 1008d444c3c3STheodore Ts'o * truncate, the inode and all the metadata blocks *must* be in a 1009d444c3c3STheodore Ts'o * consistent state which allows truncation of the orphans to restart 1010d444c3c3STheodore Ts'o * during recovery. Hence we must fix the get_block-vs-truncate race 1011d444c3c3STheodore Ts'o * by other means, so we have i_data_sem. 1012d444c3c3STheodore Ts'o */ 1013d444c3c3STheodore Ts'o struct rw_semaphore i_data_sem; 1014ea3d7209SJan Kara /* 1015ea3d7209SJan Kara * i_mmap_sem is for serializing page faults with truncate / punch hole 1016ea3d7209SJan Kara * operations. We have to make sure that new page cannot be faulted in 1017ea3d7209SJan Kara * a section of the inode that is being punched. We cannot easily use 1018ea3d7209SJan Kara * i_data_sem for this since we need protection for the whole punch 1019ea3d7209SJan Kara * operation and i_data_sem ranks below transaction start so we have 1020ea3d7209SJan Kara * to occasionally drop it. 1021ea3d7209SJan Kara */ 1022ea3d7209SJan Kara struct rw_semaphore i_mmap_sem; 1023d444c3c3STheodore Ts'o struct inode vfs_inode; 10248aefcd55STheodore Ts'o struct jbd2_inode *jinode; 1025d444c3c3STheodore Ts'o 1026202ee5dfSTheodore Ts'o spinlock_t i_raw_lock; /* protects updates to the raw inode */ 1027202ee5dfSTheodore Ts'o 1028d444c3c3STheodore Ts'o /* 1029d444c3c3STheodore Ts'o * File creation time. Its function is same as that of 1030d444c3c3STheodore Ts'o * struct timespec i_{a,c,m}time in the generic inode. 1031d444c3c3STheodore Ts'o */ 1032d444c3c3STheodore Ts'o struct timespec i_crtime; 1033d444c3c3STheodore Ts'o 1034d444c3c3STheodore Ts'o /* mballoc */ 1035d444c3c3STheodore Ts'o struct list_head i_prealloc_list; 1036d444c3c3STheodore Ts'o spinlock_t i_prealloc_lock; 1037d444c3c3STheodore Ts'o 1038c0677e6dSZheng Liu /* extents status tree */ 1039c0677e6dSZheng Liu struct ext4_es_tree i_es_tree; 1040c0677e6dSZheng Liu rwlock_t i_es_lock; 1041edaa53caSZheng Liu struct list_head i_es_list; 1042eb68d0e2SZheng Liu unsigned int i_es_all_nr; /* protected by i_es_lock */ 1043edaa53caSZheng Liu unsigned int i_es_shk_nr; /* protected by i_es_lock */ 1044dd475925SJan Kara ext4_lblk_t i_es_shrink_lblk; /* Offset where we start searching for 1045dd475925SJan Kara extents to shrink. Protected by 1046dd475925SJan Kara i_es_lock */ 1047c0677e6dSZheng Liu 1048d444c3c3STheodore Ts'o /* ialloc */ 1049d444c3c3STheodore Ts'o ext4_group_t i_last_alloc_group; 1050d444c3c3STheodore Ts'o 1051d444c3c3STheodore Ts'o /* allocation reservation info for delalloc */ 105257042651STheodore Ts'o /* In case of bigalloc, these refer to clusters rather than blocks */ 1053d444c3c3STheodore Ts'o unsigned int i_reserved_data_blocks; 1054d444c3c3STheodore Ts'o unsigned int i_reserved_meta_blocks; 1055d444c3c3STheodore Ts'o unsigned int i_allocated_meta_blocks; 105601f49d0bSTheodore Ts'o ext4_lblk_t i_da_metadata_calc_last_lblock; 10579d0be502STheodore Ts'o int i_da_metadata_calc_len; 1058d444c3c3STheodore Ts'o 1059d444c3c3STheodore Ts'o /* on-disk additional length */ 1060d444c3c3STheodore Ts'o __u16 i_extra_isize; 1061d444c3c3STheodore Ts'o 106267cf5b09STao Ma /* Indicate the inline data space. */ 106367cf5b09STao Ma u16 i_inline_off; 106467cf5b09STao Ma u16 i_inline_size; 106567cf5b09STao Ma 1066a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1067a9e7f447SDmitry Monakhov /* quota space reservation, managed internally by quota code */ 1068a9e7f447SDmitry Monakhov qsize_t i_reserved_quota; 1069a9e7f447SDmitry Monakhov #endif 10708d5d02e6SMingming Cao 10712e8fa54eSJan Kara /* Lock protecting lists below */ 1072744692dcSJiaying Zhang spinlock_t i_completed_io_lock; 10732e8fa54eSJan Kara /* 10742e8fa54eSJan Kara * Completed IOs that need unwritten extents handling and have 10752e8fa54eSJan Kara * transaction reserved 10762e8fa54eSJan Kara */ 10772e8fa54eSJan Kara struct list_head i_rsv_conversion_list; 10782e8fa54eSJan Kara struct work_struct i_rsv_conversion_work; 1079600be30aSJan Kara atomic_t i_unwritten; /* Nr. of inflight conversions pending */ 10808a2005d3STheodore Ts'o 10818a2005d3STheodore Ts'o spinlock_t i_block_reservation_lock; 1082b436b9beSJan Kara 1083b436b9beSJan Kara /* 1084b436b9beSJan Kara * Transactions that contain inode's metadata needed to complete 1085b436b9beSJan Kara * fsync and fdatasync, respectively. 1086b436b9beSJan Kara */ 1087b436b9beSJan Kara tid_t i_sync_tid; 1088b436b9beSJan Kara tid_t i_datasync_tid; 1089814525f4SDarrick J. Wong 109096c7e0d9SJan Kara #ifdef CONFIG_QUOTA 109196c7e0d9SJan Kara struct dquot *i_dquot[MAXQUOTAS]; 109296c7e0d9SJan Kara #endif 109396c7e0d9SJan Kara 1094814525f4SDarrick J. Wong /* Precomputed uuid+inum+igen checksum for seeding inode checksums */ 1095814525f4SDarrick J. Wong __u32 i_csum_seed; 1096b30ab0e0SMichael Halcrow 1097040cb378SLi Xi kprojid_t i_projid; 1098d444c3c3STheodore Ts'o }; 1099d444c3c3STheodore Ts'o 1100d444c3c3STheodore Ts'o /* 11013dcf5451SChristoph Hellwig * File system states 11023dcf5451SChristoph Hellwig */ 11033dcf5451SChristoph Hellwig #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ 11043dcf5451SChristoph Hellwig #define EXT4_ERROR_FS 0x0002 /* Errors detected */ 11053dcf5451SChristoph Hellwig #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ 11063dcf5451SChristoph Hellwig 11073dcf5451SChristoph Hellwig /* 11083dcf5451SChristoph Hellwig * Misc. filesystem flags 11093dcf5451SChristoph Hellwig */ 11103dcf5451SChristoph Hellwig #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ 11113dcf5451SChristoph Hellwig #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ 11123dcf5451SChristoph Hellwig #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ 11133dcf5451SChristoph Hellwig 11143dcf5451SChristoph Hellwig /* 111568911009SLukas Czerner * Mount flags set via mount options or defaults 11163dcf5451SChristoph Hellwig */ 11173dcf5451SChristoph Hellwig #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ 11183dcf5451SChristoph Hellwig #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ 11193dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ 11203dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ 11213dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ 112239ef17f1STheodore Ts'o #define EXT4_MOUNT_ERRORS_MASK 0x00070 11233dcf5451SChristoph Hellwig #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ 11243dcf5451SChristoph Hellwig #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ 1125923ae0ffSRoss Zwisler #ifdef CONFIG_FS_DAX 1126923ae0ffSRoss Zwisler #define EXT4_MOUNT_DAX 0x00200 /* Direct Access */ 1127923ae0ffSRoss Zwisler #else 1128923ae0ffSRoss Zwisler #define EXT4_MOUNT_DAX 0 1129923ae0ffSRoss Zwisler #endif 11303dcf5451SChristoph Hellwig #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ 11313dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ 11323dcf5451SChristoph Hellwig #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ 11333dcf5451SChristoph Hellwig #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ 11343dcf5451SChristoph Hellwig #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ 11353dcf5451SChristoph Hellwig #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ 11363dcf5451SChristoph Hellwig #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ 11373dcf5451SChristoph Hellwig #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ 1138afd4672dSTheodore Ts'o #define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000 /* No auto delalloc mapping */ 11393dcf5451SChristoph Hellwig #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ 114049da9392SJan Kara #define EXT4_MOUNT_QUOTA 0x40000 /* Some quota option set */ 114149da9392SJan Kara #define EXT4_MOUNT_USRQUOTA 0x80000 /* "old" user quota, 114249da9392SJan Kara * enable enforcement for hidden 114349da9392SJan Kara * quota files */ 114449da9392SJan Kara #define EXT4_MOUNT_GRPQUOTA 0x100000 /* "old" group quota, enable 114549da9392SJan Kara * enforcement for hidden quota 114649da9392SJan Kara * files */ 114749da9392SJan Kara #define EXT4_MOUNT_PRJQUOTA 0x200000 /* Enable project quota 114849da9392SJan Kara * enforcement */ 1149744692dcSJiaying Zhang #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */ 1150d4da6c9cSLinus Torvalds #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ 11513dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ 115264769240SAlex Tomas #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ 11535bf5683aSHidehiro Kawai #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ 11546fd058f7STheodore Ts'o #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ 11555328e635SEric Sandeen #define EXT4_MOUNT_DISCARD 0x40000000 /* Issue DISCARD requests */ 1156bfff6873SLukas Czerner #define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000 /* Initialize uninitialized itables */ 11575bf5683aSHidehiro Kawai 115868911009SLukas Czerner /* 115968911009SLukas Czerner * Mount flags set either automatically (could not be set by mount option) 116068911009SLukas Czerner * based on per file system feature or property or in special cases such as 116168911009SLukas Czerner * distinguishing between explicit mount option definition and default. 116268911009SLukas Czerner */ 116356889787STheodore Ts'o #define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001 /* User explicitly 116456889787STheodore Ts'o specified delalloc */ 116568911009SLukas Czerner #define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002 /* We have standard group 116668911009SLukas Czerner size of blocksize * 8 116768911009SLukas Czerner blocks */ 1168ed3654ebSTheodore Ts'o #define EXT4_MOUNT2_HURD_COMPAT 0x00000004 /* Support HURD-castrated 1169ed3654ebSTheodore Ts'o file systems */ 117056889787STheodore Ts'o 11711e381f60SDmitry Monakhov #define EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM 0x00000008 /* User explicitly 11721e381f60SDmitry Monakhov specified journal checksum */ 11731e381f60SDmitry Monakhov 1174fd8c37ecSTheodore Ts'o #define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \ 1175fd8c37ecSTheodore Ts'o ~EXT4_MOUNT_##opt 1176fd8c37ecSTheodore Ts'o #define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \ 1177fd8c37ecSTheodore Ts'o EXT4_MOUNT_##opt 11783dcf5451SChristoph Hellwig #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ 11793dcf5451SChristoph Hellwig EXT4_MOUNT_##opt) 11803dcf5451SChristoph Hellwig 1181a2595b8aSTheodore Ts'o #define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \ 1182a2595b8aSTheodore Ts'o ~EXT4_MOUNT2_##opt 1183a2595b8aSTheodore Ts'o #define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \ 1184a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt 1185a2595b8aSTheodore Ts'o #define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \ 1186a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt) 1187a2595b8aSTheodore Ts'o 1188597d508cSAkinobu Mita #define ext4_test_and_set_bit __test_and_set_bit_le 1189597d508cSAkinobu Mita #define ext4_set_bit __set_bit_le 11903dcf5451SChristoph Hellwig #define ext4_set_bit_atomic ext2_set_bit_atomic 1191597d508cSAkinobu Mita #define ext4_test_and_clear_bit __test_and_clear_bit_le 1192597d508cSAkinobu Mita #define ext4_clear_bit __clear_bit_le 11933dcf5451SChristoph Hellwig #define ext4_clear_bit_atomic ext2_clear_bit_atomic 119450e0168cSAkinobu Mita #define ext4_test_bit test_bit_le 119550e0168cSAkinobu Mita #define ext4_find_next_zero_bit find_next_zero_bit_le 119650e0168cSAkinobu Mita #define ext4_find_next_bit find_next_bit_le 11973dcf5451SChristoph Hellwig 1198c3e94d1dSYongqiang Yang extern void ext4_set_bits(void *bm, int cur, int len); 1199c3e94d1dSYongqiang Yang 12003dcf5451SChristoph Hellwig /* 12013dcf5451SChristoph Hellwig * Maximal mount counts between two filesystem checks 12023dcf5451SChristoph Hellwig */ 12033dcf5451SChristoph Hellwig #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ 12043dcf5451SChristoph Hellwig #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ 12053dcf5451SChristoph Hellwig 12063dcf5451SChristoph Hellwig /* 12073dcf5451SChristoph Hellwig * Behaviour when detecting errors 12083dcf5451SChristoph Hellwig */ 12093dcf5451SChristoph Hellwig #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ 12103dcf5451SChristoph Hellwig #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ 12113dcf5451SChristoph Hellwig #define EXT4_ERRORS_PANIC 3 /* Panic */ 12123dcf5451SChristoph Hellwig #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE 12133dcf5451SChristoph Hellwig 1214e6153918SDarrick J. Wong /* Metadata checksum algorithm codes */ 1215e6153918SDarrick J. Wong #define EXT4_CRC32C_CHKSUM 1 1216e6153918SDarrick J. Wong 12173dcf5451SChristoph Hellwig /* 12183dcf5451SChristoph Hellwig * Structure of the super block 12193dcf5451SChristoph Hellwig */ 12203dcf5451SChristoph Hellwig struct ext4_super_block { 12213dcf5451SChristoph Hellwig /*00*/ __le32 s_inodes_count; /* Inodes count */ 12223dcf5451SChristoph Hellwig __le32 s_blocks_count_lo; /* Blocks count */ 12233dcf5451SChristoph Hellwig __le32 s_r_blocks_count_lo; /* Reserved blocks count */ 12243dcf5451SChristoph Hellwig __le32 s_free_blocks_count_lo; /* Free blocks count */ 12253dcf5451SChristoph Hellwig /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ 12263dcf5451SChristoph Hellwig __le32 s_first_data_block; /* First Data Block */ 12273dcf5451SChristoph Hellwig __le32 s_log_block_size; /* Block size */ 1228281b5995STheodore Ts'o __le32 s_log_cluster_size; /* Allocation cluster size */ 12293dcf5451SChristoph Hellwig /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ 1230281b5995STheodore Ts'o __le32 s_clusters_per_group; /* # Clusters per group */ 12313dcf5451SChristoph Hellwig __le32 s_inodes_per_group; /* # Inodes per group */ 12323dcf5451SChristoph Hellwig __le32 s_mtime; /* Mount time */ 12333dcf5451SChristoph Hellwig /*30*/ __le32 s_wtime; /* Write time */ 12343dcf5451SChristoph Hellwig __le16 s_mnt_count; /* Mount count */ 12353dcf5451SChristoph Hellwig __le16 s_max_mnt_count; /* Maximal mount count */ 12363dcf5451SChristoph Hellwig __le16 s_magic; /* Magic signature */ 12373dcf5451SChristoph Hellwig __le16 s_state; /* File system state */ 12383dcf5451SChristoph Hellwig __le16 s_errors; /* Behaviour when detecting errors */ 12393dcf5451SChristoph Hellwig __le16 s_minor_rev_level; /* minor revision level */ 12403dcf5451SChristoph Hellwig /*40*/ __le32 s_lastcheck; /* time of last check */ 12413dcf5451SChristoph Hellwig __le32 s_checkinterval; /* max. time between checks */ 12423dcf5451SChristoph Hellwig __le32 s_creator_os; /* OS */ 12433dcf5451SChristoph Hellwig __le32 s_rev_level; /* Revision level */ 12443dcf5451SChristoph Hellwig /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ 12453dcf5451SChristoph Hellwig __le16 s_def_resgid; /* Default gid for reserved blocks */ 12463dcf5451SChristoph Hellwig /* 12473dcf5451SChristoph Hellwig * These fields are for EXT4_DYNAMIC_REV superblocks only. 12483dcf5451SChristoph Hellwig * 12493dcf5451SChristoph Hellwig * Note: the difference between the compatible feature set and 12503dcf5451SChristoph Hellwig * the incompatible feature set is that if there is a bit set 12513dcf5451SChristoph Hellwig * in the incompatible feature set that the kernel doesn't 12523dcf5451SChristoph Hellwig * know about, it should refuse to mount the filesystem. 12533dcf5451SChristoph Hellwig * 12543dcf5451SChristoph Hellwig * e2fsck's requirements are more strict; if it doesn't know 12553dcf5451SChristoph Hellwig * about a feature in either the compatible or incompatible 12563dcf5451SChristoph Hellwig * feature set, it must abort and not try to meddle with 12573dcf5451SChristoph Hellwig * things it doesn't understand... 12583dcf5451SChristoph Hellwig */ 12593dcf5451SChristoph Hellwig __le32 s_first_ino; /* First non-reserved inode */ 12603dcf5451SChristoph Hellwig __le16 s_inode_size; /* size of inode structure */ 12613dcf5451SChristoph Hellwig __le16 s_block_group_nr; /* block group # of this superblock */ 12623dcf5451SChristoph Hellwig __le32 s_feature_compat; /* compatible feature set */ 12633dcf5451SChristoph Hellwig /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ 12643dcf5451SChristoph Hellwig __le32 s_feature_ro_compat; /* readonly-compatible feature set */ 12653dcf5451SChristoph Hellwig /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ 12663dcf5451SChristoph Hellwig /*78*/ char s_volume_name[16]; /* volume name */ 12673dcf5451SChristoph Hellwig /*88*/ char s_last_mounted[64]; /* directory where last mounted */ 12683dcf5451SChristoph Hellwig /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ 12693dcf5451SChristoph Hellwig /* 12703dcf5451SChristoph Hellwig * Performance hints. Directory preallocation should only 12713dcf5451SChristoph Hellwig * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. 12723dcf5451SChristoph Hellwig */ 12733dcf5451SChristoph Hellwig __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 12743dcf5451SChristoph Hellwig __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 12753dcf5451SChristoph Hellwig __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ 12763dcf5451SChristoph Hellwig /* 12773dcf5451SChristoph Hellwig * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. 12783dcf5451SChristoph Hellwig */ 12793dcf5451SChristoph Hellwig /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 12803dcf5451SChristoph Hellwig /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ 12813dcf5451SChristoph Hellwig __le32 s_journal_dev; /* device number of journal file */ 12823dcf5451SChristoph Hellwig __le32 s_last_orphan; /* start of list of inodes to delete */ 12833dcf5451SChristoph Hellwig __le32 s_hash_seed[4]; /* HTREE hash seed */ 12843dcf5451SChristoph Hellwig __u8 s_def_hash_version; /* Default hash version to use */ 128589eeddf0STheodore Ts'o __u8 s_jnl_backup_type; 12863dcf5451SChristoph Hellwig __le16 s_desc_size; /* size of group descriptor */ 12873dcf5451SChristoph Hellwig /*100*/ __le32 s_default_mount_opts; 12883dcf5451SChristoph Hellwig __le32 s_first_meta_bg; /* First metablock block group */ 12893dcf5451SChristoph Hellwig __le32 s_mkfs_time; /* When the filesystem was created */ 12903dcf5451SChristoph Hellwig __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ 12913dcf5451SChristoph Hellwig /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ 12923dcf5451SChristoph Hellwig /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ 12933dcf5451SChristoph Hellwig __le32 s_r_blocks_count_hi; /* Reserved blocks count */ 12943dcf5451SChristoph Hellwig __le32 s_free_blocks_count_hi; /* Free blocks count */ 12953dcf5451SChristoph Hellwig __le16 s_min_extra_isize; /* All inodes have at least # bytes */ 12963dcf5451SChristoph Hellwig __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ 12973dcf5451SChristoph Hellwig __le32 s_flags; /* Miscellaneous flags */ 12983dcf5451SChristoph Hellwig __le16 s_raid_stride; /* RAID stride */ 1299c5e06d10SJohann Lombardi __le16 s_mmp_update_interval; /* # seconds to wait in MMP checking */ 13003dcf5451SChristoph Hellwig __le64 s_mmp_block; /* Block for multi-mount protection */ 13013dcf5451SChristoph Hellwig __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ 1302772cb7c8SJose R. Santos __u8 s_log_groups_per_flex; /* FLEX_BG group size */ 1303e6153918SDarrick J. Wong __u8 s_checksum_type; /* metadata checksum algorithm used */ 1304f542fbe8STheodore Ts'o __u8 s_encryption_level; /* versioning level for encryption */ 1305f542fbe8STheodore Ts'o __u8 s_reserved_pad; /* Padding to next 32bits */ 1306afc32f7eSTheodore Ts'o __le64 s_kbytes_written; /* nr of lifetime kilobytes written */ 13074a9cdec7STheodore Ts'o __le32 s_snapshot_inum; /* Inode number of active snapshot */ 13084a9cdec7STheodore Ts'o __le32 s_snapshot_id; /* sequential ID of active snapshot */ 13094a9cdec7STheodore Ts'o __le64 s_snapshot_r_blocks_count; /* reserved blocks for active 13104a9cdec7STheodore Ts'o snapshot's future use */ 13114a9cdec7STheodore Ts'o __le32 s_snapshot_list; /* inode number of the head of the 13124a9cdec7STheodore Ts'o on-disk snapshot list */ 13131c13d5c0STheodore Ts'o #define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count) 13141c13d5c0STheodore Ts'o __le32 s_error_count; /* number of fs errors */ 13151c13d5c0STheodore Ts'o __le32 s_first_error_time; /* first time an error happened */ 13161c13d5c0STheodore Ts'o __le32 s_first_error_ino; /* inode involved in first error */ 13171c13d5c0STheodore Ts'o __le64 s_first_error_block; /* block involved of first error */ 13181c13d5c0STheodore Ts'o __u8 s_first_error_func[32]; /* function where the error happened */ 13191c13d5c0STheodore Ts'o __le32 s_first_error_line; /* line number where error happened */ 13201c13d5c0STheodore Ts'o __le32 s_last_error_time; /* most recent time of an error */ 13211c13d5c0STheodore Ts'o __le32 s_last_error_ino; /* inode involved in last error */ 13221c13d5c0STheodore Ts'o __le32 s_last_error_line; /* line number where error happened */ 13231c13d5c0STheodore Ts'o __le64 s_last_error_block; /* block involved of last error */ 13241c13d5c0STheodore Ts'o __u8 s_last_error_func[32]; /* function where the error happened */ 13258b67f04aSTheodore Ts'o #define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts) 13268b67f04aSTheodore Ts'o __u8 s_mount_opts[64]; 1327281b5995STheodore Ts'o __le32 s_usr_quota_inum; /* inode for tracking user quota */ 1328281b5995STheodore Ts'o __le32 s_grp_quota_inum; /* inode for tracking group quota */ 1329281b5995STheodore Ts'o __le32 s_overhead_clusters; /* overhead blocks/clusters in fs */ 13301beeef1bSDarrick J. Wong __le32 s_backup_bgs[2]; /* groups with sparse_super2 SBs */ 13313edc18d8STheodore Ts'o __u8 s_encrypt_algos[4]; /* Encryption algorithms in use */ 1332f542fbe8STheodore Ts'o __u8 s_encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ 1333f542fbe8STheodore Ts'o __le32 s_lpf_ino; /* Location of the lost+found inode */ 13348b4953e1STheodore Ts'o __le32 s_prj_quota_inum; /* inode for tracking project quota */ 13358c81bd8fSDarrick J. Wong __le32 s_checksum_seed; /* crc32c(uuid) if csum_seed set */ 13368c81bd8fSDarrick J. Wong __le32 s_reserved[98]; /* Padding to the end of the block */ 1337e6153918SDarrick J. Wong __le32 s_checksum; /* crc32c(superblock) */ 13383dcf5451SChristoph Hellwig }; 13393dcf5451SChristoph Hellwig 13401c13d5c0STheodore Ts'o #define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START) 13411c13d5c0STheodore Ts'o 13423dcf5451SChristoph Hellwig #ifdef __KERNEL__ 1343bc0b0d6dSTheodore Ts'o 1344bc0b0d6dSTheodore Ts'o /* 13454ab2f15bSTheodore Ts'o * run-time mount flags 1346bc0b0d6dSTheodore Ts'o */ 1347bc0b0d6dSTheodore Ts'o #define EXT4_MF_MNTDIR_SAMPLED 0x0001 13484ab2f15bSTheodore Ts'o #define EXT4_MF_FS_ABORTED 0x0002 /* Fatal error detected */ 13496ddb2447STheodore Ts'o #define EXT4_MF_TEST_DUMMY_ENCRYPTION 0x0004 13506ddb2447STheodore Ts'o 13516ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 13526ddb2447STheodore Ts'o #define DUMMY_ENCRYPTION_ENABLED(sbi) (unlikely((sbi)->s_mount_flags & \ 13536ddb2447STheodore Ts'o EXT4_MF_TEST_DUMMY_ENCRYPTION)) 13546ddb2447STheodore Ts'o #else 13556ddb2447STheodore Ts'o #define DUMMY_ENCRYPTION_ENABLED(sbi) (0) 13566ddb2447STheodore Ts'o #endif 1357bc0b0d6dSTheodore Ts'o 1358a2d4a646SJan Kara /* Number of quota types we support */ 1359689c958cSLi Xi #define EXT4_MAXQUOTAS 3 1360a2d4a646SJan Kara 1361ca0faba0STheodore Ts'o /* 1362ca0faba0STheodore Ts'o * fourth extended-fs super-block data in memory 1363ca0faba0STheodore Ts'o */ 1364ca0faba0STheodore Ts'o struct ext4_sb_info { 1365ca0faba0STheodore Ts'o unsigned long s_desc_size; /* Size of a group descriptor in bytes */ 1366ca0faba0STheodore Ts'o unsigned long s_inodes_per_block;/* Number of inodes per block */ 1367ca0faba0STheodore Ts'o unsigned long s_blocks_per_group;/* Number of blocks in a group */ 1368281b5995STheodore Ts'o unsigned long s_clusters_per_group; /* Number of clusters in a group */ 1369ca0faba0STheodore Ts'o unsigned long s_inodes_per_group;/* Number of inodes in a group */ 1370ca0faba0STheodore Ts'o unsigned long s_itb_per_group; /* Number of inode table blocks per group */ 1371ca0faba0STheodore Ts'o unsigned long s_gdb_count; /* Number of group descriptor blocks */ 1372ca0faba0STheodore Ts'o unsigned long s_desc_per_block; /* Number of group descriptors per block */ 1373ca0faba0STheodore Ts'o ext4_group_t s_groups_count; /* Number of groups in the fs */ 1374fb0a387dSEric Sandeen ext4_group_t s_blockfile_groups;/* Groups acceptable for non-extent files */ 1375952fc18eSTheodore Ts'o unsigned long s_overhead; /* # of fs overhead clusters */ 1376281b5995STheodore Ts'o unsigned int s_cluster_ratio; /* Number of blocks per cluster */ 1377281b5995STheodore Ts'o unsigned int s_cluster_bits; /* log2 of s_cluster_ratio */ 1378ca0faba0STheodore Ts'o loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ 1379ca0faba0STheodore Ts'o struct buffer_head * s_sbh; /* Buffer containing the super block */ 1380ca0faba0STheodore Ts'o struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ 1381ca0faba0STheodore Ts'o struct buffer_head **s_group_desc; 13827f4520ccSTheodore Ts'o unsigned int s_mount_opt; 1383a2595b8aSTheodore Ts'o unsigned int s_mount_opt2; 1384bc0b0d6dSTheodore Ts'o unsigned int s_mount_flags; 13855a916be1STheodore Ts'o unsigned int s_def_mount_opt; 1386ca0faba0STheodore Ts'o ext4_fsblk_t s_sb_block; 138727dd4385SLukas Czerner atomic64_t s_resv_clusters; 138808cefc7aSEric W. Biederman kuid_t s_resuid; 138908cefc7aSEric W. Biederman kgid_t s_resgid; 1390ca0faba0STheodore Ts'o unsigned short s_mount_state; 1391ca0faba0STheodore Ts'o unsigned short s_pad; 1392ca0faba0STheodore Ts'o int s_addr_per_block_bits; 1393ca0faba0STheodore Ts'o int s_desc_per_block_bits; 1394ca0faba0STheodore Ts'o int s_inode_size; 1395ca0faba0STheodore Ts'o int s_first_ino; 1396ca0faba0STheodore Ts'o unsigned int s_inode_readahead_blks; 139711013911SAndreas Dilger unsigned int s_inode_goal; 1398ca0faba0STheodore Ts'o spinlock_t s_next_gen_lock; 1399ca0faba0STheodore Ts'o u32 s_next_generation; 1400ca0faba0STheodore Ts'o u32 s_hash_seed[4]; 1401ca0faba0STheodore Ts'o int s_def_hash_version; 1402ca0faba0STheodore Ts'o int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */ 140357042651STheodore Ts'o struct percpu_counter s_freeclusters_counter; 1404ca0faba0STheodore Ts'o struct percpu_counter s_freeinodes_counter; 1405ca0faba0STheodore Ts'o struct percpu_counter s_dirs_counter; 140657042651STheodore Ts'o struct percpu_counter s_dirtyclusters_counter; 1407ca0faba0STheodore Ts'o struct blockgroup_lock *s_blockgroup_lock; 1408ca0faba0STheodore Ts'o struct proc_dir_entry *s_proc; 1409ca0faba0STheodore Ts'o struct kobject s_kobj; 1410ca0faba0STheodore Ts'o struct completion s_kobj_unregister; 14112c0544b2STheodore Ts'o struct super_block *s_sb; 1412ca0faba0STheodore Ts'o 1413ca0faba0STheodore Ts'o /* Journaling */ 1414ca0faba0STheodore Ts'o struct journal_s *s_journal; 1415ca0faba0STheodore Ts'o struct list_head s_orphan; 1416ca0faba0STheodore Ts'o struct mutex s_orphan_lock; 14179549a168STheodore Ts'o unsigned long s_ext4_flags; /* Ext4 superblock flags */ 1418ca0faba0STheodore Ts'o unsigned long s_commit_interval; 1419ca0faba0STheodore Ts'o u32 s_max_batch_time; 1420ca0faba0STheodore Ts'o u32 s_min_batch_time; 1421ca0faba0STheodore Ts'o struct block_device *journal_bdev; 1422ca0faba0STheodore Ts'o #ifdef CONFIG_QUOTA 1423a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; /* Names of quota files with journalled quota */ 1424ca0faba0STheodore Ts'o int s_jquota_fmt; /* Format of quota to use */ 1425ca0faba0STheodore Ts'o #endif 1426ca0faba0STheodore Ts'o unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ 14276fd058f7STheodore Ts'o struct rb_root system_blks; 1428ca0faba0STheodore Ts'o 1429ca0faba0STheodore Ts'o #ifdef EXTENTS_STATS 1430ca0faba0STheodore Ts'o /* ext4 extents stats */ 1431ca0faba0STheodore Ts'o unsigned long s_ext_min; 1432ca0faba0STheodore Ts'o unsigned long s_ext_max; 1433ca0faba0STheodore Ts'o unsigned long s_depth_max; 1434ca0faba0STheodore Ts'o spinlock_t s_ext_stats_lock; 1435ca0faba0STheodore Ts'o unsigned long s_ext_blocks; 1436ca0faba0STheodore Ts'o unsigned long s_ext_extents; 1437ca0faba0STheodore Ts'o #endif 1438ca0faba0STheodore Ts'o 1439ca0faba0STheodore Ts'o /* for buddy allocator */ 1440ca0faba0STheodore Ts'o struct ext4_group_info ***s_group_info; 1441ca0faba0STheodore Ts'o struct inode *s_buddy_cache; 1442ca0faba0STheodore Ts'o spinlock_t s_md_lock; 1443ca0faba0STheodore Ts'o unsigned short *s_mb_offsets; 1444ca0faba0STheodore Ts'o unsigned int *s_mb_maxs; 144528623c2fSTheodore Ts'o unsigned int s_group_info_size; 1446d08854f5STheodore Ts'o unsigned int s_mb_free_pending; 1447ca0faba0STheodore Ts'o 1448ca0faba0STheodore Ts'o /* tunables */ 1449ca0faba0STheodore Ts'o unsigned long s_stripe; 1450ca0faba0STheodore Ts'o unsigned int s_mb_stream_request; 1451ca0faba0STheodore Ts'o unsigned int s_mb_max_to_scan; 1452ca0faba0STheodore Ts'o unsigned int s_mb_min_to_scan; 1453ca0faba0STheodore Ts'o unsigned int s_mb_stats; 1454ca0faba0STheodore Ts'o unsigned int s_mb_order2_reqs; 1455ca0faba0STheodore Ts'o unsigned int s_mb_group_prealloc; 1456df981d03STheodore Ts'o unsigned int s_max_dir_size_kb; 1457ca0faba0STheodore Ts'o /* where last allocation was done - for stream allocation */ 1458ca0faba0STheodore Ts'o unsigned long s_mb_last_group; 1459ca0faba0STheodore Ts'o unsigned long s_mb_last_start; 1460ca0faba0STheodore Ts'o 1461ca0faba0STheodore Ts'o /* stats for buddy allocator */ 1462ca0faba0STheodore Ts'o atomic_t s_bal_reqs; /* number of reqs with len > 1 */ 1463ca0faba0STheodore Ts'o atomic_t s_bal_success; /* we found long enough chunks */ 1464ca0faba0STheodore Ts'o atomic_t s_bal_allocated; /* in blocks */ 1465ca0faba0STheodore Ts'o atomic_t s_bal_ex_scanned; /* total extents scanned */ 1466ca0faba0STheodore Ts'o atomic_t s_bal_goals; /* goal hits */ 1467ca0faba0STheodore Ts'o atomic_t s_bal_breaks; /* too long searches */ 1468ca0faba0STheodore Ts'o atomic_t s_bal_2orders; /* 2^order hits */ 1469ca0faba0STheodore Ts'o spinlock_t s_bal_lock; 1470ca0faba0STheodore Ts'o unsigned long s_mb_buddies_generated; 1471ca0faba0STheodore Ts'o unsigned long long s_mb_generation_time; 1472ca0faba0STheodore Ts'o atomic_t s_mb_lost_chunks; 1473ca0faba0STheodore Ts'o atomic_t s_mb_preallocated; 1474ca0faba0STheodore Ts'o atomic_t s_mb_discarded; 147550797481STheodore Ts'o atomic_t s_lock_busy; 1476ca0faba0STheodore Ts'o 1477ca0faba0STheodore Ts'o /* locality groups */ 1478003cb608STejun Heo struct ext4_locality_group __percpu *s_locality_groups; 1479ca0faba0STheodore Ts'o 1480ca0faba0STheodore Ts'o /* for write statistics */ 1481ca0faba0STheodore Ts'o unsigned long s_sectors_written_start; 1482ca0faba0STheodore Ts'o u64 s_kbytes_written; 1483ca0faba0STheodore Ts'o 148467a5da56SZheng Liu /* the size of zero-out chunk */ 148567a5da56SZheng Liu unsigned int s_extent_max_zeroout_kb; 148667a5da56SZheng Liu 1487ca0faba0STheodore Ts'o unsigned int s_log_groups_per_flex; 1488ca0faba0STheodore Ts'o struct flex_groups *s_flex_groups; 1489117fff10STheodore Ts'o ext4_group_t s_flex_groups_allocated; 14904c0425ffSMingming Cao 14912e8fa54eSJan Kara /* workqueue for reserved extent conversions (buffered io) */ 14922e8fa54eSJan Kara struct workqueue_struct *rsv_conversion_wq; 149366e61a9eSTheodore Ts'o 149466e61a9eSTheodore Ts'o /* timer for periodic error stats printing */ 149566e61a9eSTheodore Ts'o struct timer_list s_err_report; 1496bfff6873SLukas Czerner 1497bfff6873SLukas Czerner /* Lazy inode table initialization info */ 1498bfff6873SLukas Czerner struct ext4_li_request *s_li_request; 1499bfff6873SLukas Czerner /* Wait multiplier for lazy initialization thread */ 1500bfff6873SLukas Czerner unsigned int s_li_wait_mult; 1501c5e06d10SJohann Lombardi 1502c5e06d10SJohann Lombardi /* Kernel thread for multiple mount protection */ 1503c5e06d10SJohann Lombardi struct task_struct *s_mmp_tsk; 15043d56b8d2STao Ma 15053d56b8d2STao Ma /* record the last minlen when FITRIM is called. */ 15063d56b8d2STao Ma atomic_t s_last_trim_minblks; 15070441984aSDarrick J. Wong 15080441984aSDarrick J. Wong /* Reference to checksum algorithm driver via cryptoapi */ 15090441984aSDarrick J. Wong struct crypto_shash *s_chksum_driver; 1510a9c47317SDarrick J. Wong 1511a9c47317SDarrick J. Wong /* Precomputed FS UUID checksum for seeding other checksums */ 1512a9c47317SDarrick J. Wong __u32 s_csum_seed; 151374cd15cdSZheng Liu 151474cd15cdSZheng Liu /* Reclaim extents from extent status tree */ 151574cd15cdSZheng Liu struct shrinker s_es_shrinker; 1516dd475925SJan Kara struct list_head s_es_list; /* List of inodes with reclaimable extents */ 1517edaa53caSZheng Liu long s_es_nr_inode; 1518eb68d0e2SZheng Liu struct ext4_es_stats s_es_stats; 15197a2508e1SJan Kara struct mb_cache *s_mb_cache; 1520edaa53caSZheng Liu spinlock_t s_es_lock ____cacheline_aligned_in_smp; 1521efbed4dcSTheodore Ts'o 1522efbed4dcSTheodore Ts'o /* Ratelimit ext4 messages. */ 1523efbed4dcSTheodore Ts'o struct ratelimit_state s_err_ratelimit_state; 1524efbed4dcSTheodore Ts'o struct ratelimit_state s_warning_ratelimit_state; 1525efbed4dcSTheodore Ts'o struct ratelimit_state s_msg_ratelimit_state; 1526c8585c6fSDaeho Jeong 1527c8585c6fSDaeho Jeong /* Barrier between changing inodes' journal flags and writepages ops. */ 1528c8585c6fSDaeho Jeong struct percpu_rw_semaphore s_journal_flag_rwsem; 1529ca0faba0STheodore Ts'o }; 1530ca0faba0STheodore Ts'o 15313dcf5451SChristoph Hellwig static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) 15323dcf5451SChristoph Hellwig { 15333dcf5451SChristoph Hellwig return sb->s_fs_info; 15343dcf5451SChristoph Hellwig } 15353dcf5451SChristoph Hellwig static inline struct ext4_inode_info *EXT4_I(struct inode *inode) 15363dcf5451SChristoph Hellwig { 15373dcf5451SChristoph Hellwig return container_of(inode, struct ext4_inode_info, vfs_inode); 15383dcf5451SChristoph Hellwig } 15393dcf5451SChristoph Hellwig 15403dcf5451SChristoph Hellwig static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) 15413dcf5451SChristoph Hellwig { 15423dcf5451SChristoph Hellwig return ino == EXT4_ROOT_INO || 15437c319d32SAditya Kali ino == EXT4_USR_QUOTA_INO || 15447c319d32SAditya Kali ino == EXT4_GRP_QUOTA_INO || 1545393d1d1dSDr. Tilmann Bubeck ino == EXT4_BOOT_LOADER_INO || 15463dcf5451SChristoph Hellwig ino == EXT4_JOURNAL_INO || 15473dcf5451SChristoph Hellwig ino == EXT4_RESIZE_INO || 15483dcf5451SChristoph Hellwig (ino >= EXT4_FIRST_INO(sb) && 15493dcf5451SChristoph Hellwig ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); 15503dcf5451SChristoph Hellwig } 155119f5fb7aSTheodore Ts'o 155219f5fb7aSTheodore Ts'o /* 155319f5fb7aSTheodore Ts'o * Inode dynamic state flags 155419f5fb7aSTheodore Ts'o */ 155519f5fb7aSTheodore Ts'o enum { 155619f5fb7aSTheodore Ts'o EXT4_STATE_JDATA, /* journaled data exists */ 155719f5fb7aSTheodore Ts'o EXT4_STATE_NEW, /* inode is newly created */ 155819f5fb7aSTheodore Ts'o EXT4_STATE_XATTR, /* has in-inode xattrs */ 155919f5fb7aSTheodore Ts'o EXT4_STATE_NO_EXPAND, /* No space for expansion */ 156019f5fb7aSTheodore Ts'o EXT4_STATE_DA_ALLOC_CLOSE, /* Alloc DA blks on close */ 156119f5fb7aSTheodore Ts'o EXT4_STATE_EXT_MIGRATE, /* Inode is migrating */ 156219f5fb7aSTheodore Ts'o EXT4_STATE_DIO_UNWRITTEN, /* need convert on dio done*/ 156314ece102SFrank Mayhar EXT4_STATE_NEWENTRY, /* File just added to dir */ 156417335dccSDmitry Monakhov EXT4_STATE_DIOREAD_LOCK, /* Disable support for dio read 156517335dccSDmitry Monakhov nolocking */ 156667cf5b09STao Ma EXT4_STATE_MAY_INLINE_DATA, /* may have in-inode data */ 15677869a4a6STheodore Ts'o EXT4_STATE_EXT_PRECACHED, /* extents have been precached */ 156819f5fb7aSTheodore Ts'o }; 156919f5fb7aSTheodore Ts'o 1570353eb83cSTheodore Ts'o #define EXT4_INODE_BIT_FNS(name, field, offset) \ 157112e9b892SDmitry Monakhov static inline int ext4_test_inode_##name(struct inode *inode, int bit) \ 157212e9b892SDmitry Monakhov { \ 1573353eb83cSTheodore Ts'o return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 157412e9b892SDmitry Monakhov } \ 157512e9b892SDmitry Monakhov static inline void ext4_set_inode_##name(struct inode *inode, int bit) \ 157612e9b892SDmitry Monakhov { \ 1577353eb83cSTheodore Ts'o set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 157812e9b892SDmitry Monakhov } \ 157912e9b892SDmitry Monakhov static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \ 158012e9b892SDmitry Monakhov { \ 1581353eb83cSTheodore Ts'o clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 158219f5fb7aSTheodore Ts'o } 158319f5fb7aSTheodore Ts'o 15843f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 15853f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 15863f61c0ccSAndreas Dilger static inline int ext4_test_inode_flag(struct inode *inode, int bit); 15873f61c0ccSAndreas Dilger static inline void ext4_set_inode_flag(struct inode *inode, int bit); 15883f61c0ccSAndreas Dilger static inline void ext4_clear_inode_flag(struct inode *inode, int bit); 1589353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(flag, flags, 0) 15903f61c0ccSAndreas Dilger 15913f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 15923f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 15933f61c0ccSAndreas Dilger static inline int ext4_test_inode_state(struct inode *inode, int bit); 15943f61c0ccSAndreas Dilger static inline void ext4_set_inode_state(struct inode *inode, int bit); 15953f61c0ccSAndreas Dilger static inline void ext4_clear_inode_state(struct inode *inode, int bit); 1596353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 1597353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, state_flags, 0) 1598353eb83cSTheodore Ts'o 1599353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1600353eb83cSTheodore Ts'o { 1601353eb83cSTheodore Ts'o (ei)->i_state_flags = 0; 1602353eb83cSTheodore Ts'o } 1603353eb83cSTheodore Ts'o #else 1604353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, flags, 32) 1605353eb83cSTheodore Ts'o 1606353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1607353eb83cSTheodore Ts'o { 1608353eb83cSTheodore Ts'o /* We depend on the fact that callers will set i_flags */ 1609353eb83cSTheodore Ts'o } 1610353eb83cSTheodore Ts'o #endif 16113dcf5451SChristoph Hellwig #else 16123dcf5451SChristoph Hellwig /* Assume that user mode programs are passing in an ext4fs superblock, not 16133dcf5451SChristoph Hellwig * a kernel struct super_block. This will allow us to call the feature-test 16143dcf5451SChristoph Hellwig * macros from user land. */ 16153dcf5451SChristoph Hellwig #define EXT4_SB(sb) (sb) 16163dcf5451SChristoph Hellwig #endif 16173dcf5451SChristoph Hellwig 1618b30ab0e0SMichael Halcrow /* 1619b30ab0e0SMichael Halcrow * Returns true if the inode is inode is encrypted 1620b30ab0e0SMichael Halcrow */ 16213dcf5451SChristoph Hellwig #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime 16223dcf5451SChristoph Hellwig 16233dcf5451SChristoph Hellwig /* 16243dcf5451SChristoph Hellwig * Codes for operating systems 16253dcf5451SChristoph Hellwig */ 16263dcf5451SChristoph Hellwig #define EXT4_OS_LINUX 0 16273dcf5451SChristoph Hellwig #define EXT4_OS_HURD 1 16283dcf5451SChristoph Hellwig #define EXT4_OS_MASIX 2 16293dcf5451SChristoph Hellwig #define EXT4_OS_FREEBSD 3 16303dcf5451SChristoph Hellwig #define EXT4_OS_LITES 4 16313dcf5451SChristoph Hellwig 16323dcf5451SChristoph Hellwig /* 16333dcf5451SChristoph Hellwig * Revision levels 16343dcf5451SChristoph Hellwig */ 16353dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ 16363dcf5451SChristoph Hellwig #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ 16373dcf5451SChristoph Hellwig 16383dcf5451SChristoph Hellwig #define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV 16393dcf5451SChristoph Hellwig #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV 16403dcf5451SChristoph Hellwig 16413dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_INODE_SIZE 128 16423dcf5451SChristoph Hellwig 16433dcf5451SChristoph Hellwig /* 16443dcf5451SChristoph Hellwig * Feature set definitions 16453dcf5451SChristoph Hellwig */ 16463dcf5451SChristoph Hellwig 16473dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 16483dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 16493dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 16503dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 16513dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 16523dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 16531beeef1bSDarrick J. Wong #define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200 16543dcf5451SChristoph Hellwig 16553dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 16563dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 16573dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 16583dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 16593dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 16603dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 16613dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 1662ae812306SAditya Kali #define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100 1663281b5995STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200 1664e6153918SDarrick J. Wong /* 1665e6153918SDarrick J. Wong * METADATA_CSUM also enables group descriptor checksums (GDT_CSUM). When 1666e6153918SDarrick J. Wong * METADATA_CSUM is set, group descriptor checksums use the same algorithm as 1667e6153918SDarrick J. Wong * all other data structures' checksums. However, the METADATA_CSUM and 1668e6153918SDarrick J. Wong * GDT_CSUM bits are mutually exclusive. 1669e6153918SDarrick J. Wong */ 16709b90e5e0STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400 16712cb5cc8bSDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000 16728b4953e1STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000 16733dcf5451SChristoph Hellwig 16743dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 16753dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 16763dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ 16773dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ 16783dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 16793dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ 16803dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 16813dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 16823dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 1683f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */ 1684f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */ 16858c81bd8fSDarrick J. Wong #define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000 16869b90e5e0STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ 168767cf5b09STao Ma #define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ 16883edc18d8STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 16893dcf5451SChristoph Hellwig 1690e2b911c5SDarrick J. Wong #define EXT4_FEATURE_COMPAT_FUNCS(name, flagname) \ 1691e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 1692e2b911c5SDarrick J. Wong { \ 1693e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_compat & \ 1694e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname)) != 0); \ 1695e2b911c5SDarrick J. Wong } \ 1696e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 1697e2b911c5SDarrick J. Wong { \ 1698e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_compat |= \ 1699e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ 1700e2b911c5SDarrick J. Wong } \ 1701e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 1702e2b911c5SDarrick J. Wong { \ 1703e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_compat &= \ 1704e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ 1705e2b911c5SDarrick J. Wong } 1706e2b911c5SDarrick J. Wong 1707e2b911c5SDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_FUNCS(name, flagname) \ 1708e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 1709e2b911c5SDarrick J. Wong { \ 1710e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ 1711e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname)) != 0); \ 1712e2b911c5SDarrick J. Wong } \ 1713e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 1714e2b911c5SDarrick J. Wong { \ 1715e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_ro_compat |= \ 1716e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ 1717e2b911c5SDarrick J. Wong } \ 1718e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 1719e2b911c5SDarrick J. Wong { \ 1720e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_ro_compat &= \ 1721e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ 1722e2b911c5SDarrick J. Wong } 1723e2b911c5SDarrick J. Wong 1724e2b911c5SDarrick J. Wong #define EXT4_FEATURE_INCOMPAT_FUNCS(name, flagname) \ 1725e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 1726e2b911c5SDarrick J. Wong { \ 1727e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ 1728e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname)) != 0); \ 1729e2b911c5SDarrick J. Wong } \ 1730e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 1731e2b911c5SDarrick J. Wong { \ 1732e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_incompat |= \ 1733e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ 1734e2b911c5SDarrick J. Wong } \ 1735e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 1736e2b911c5SDarrick J. Wong { \ 1737e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_incompat &= \ 1738e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ 1739e2b911c5SDarrick J. Wong } 1740e2b911c5SDarrick J. Wong 1741e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(dir_prealloc, DIR_PREALLOC) 1742e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(imagic_inodes, IMAGIC_INODES) 1743e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(journal, HAS_JOURNAL) 1744e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(xattr, EXT_ATTR) 1745e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(resize_inode, RESIZE_INODE) 1746e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(dir_index, DIR_INDEX) 1747e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(sparse_super2, SPARSE_SUPER2) 1748e2b911c5SDarrick J. Wong 1749e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(sparse_super, SPARSE_SUPER) 1750e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(large_file, LARGE_FILE) 1751e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(btree_dir, BTREE_DIR) 1752e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(huge_file, HUGE_FILE) 1753e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(gdt_csum, GDT_CSUM) 1754e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(dir_nlink, DIR_NLINK) 1755e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(extra_isize, EXTRA_ISIZE) 1756e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(quota, QUOTA) 1757e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(bigalloc, BIGALLOC) 1758e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(metadata_csum, METADATA_CSUM) 1759e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(readonly, READONLY) 1760e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(project, PROJECT) 1761e2b911c5SDarrick J. Wong 1762e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(compression, COMPRESSION) 1763e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(filetype, FILETYPE) 1764e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(journal_needs_recovery, RECOVER) 1765e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(journal_dev, JOURNAL_DEV) 1766e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(meta_bg, META_BG) 1767e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(extents, EXTENTS) 1768e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT) 1769e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(mmp, MMP) 1770e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(flex_bg, FLEX_BG) 1771e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(ea_inode, EA_INODE) 1772e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(dirdata, DIRDATA) 1773e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, CSUM_SEED) 1774e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(largedir, LARGEDIR) 1775e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, INLINE_DATA) 1776e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT) 1777e2b911c5SDarrick J. Wong 17782035e776STheodore Ts'o #define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 17792035e776STheodore Ts'o #define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 17802035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 17812035e776STheodore Ts'o #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 17822035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 17832035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 17842035e776STheodore Ts'o 17852035e776STheodore Ts'o #define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 17862035e776STheodore Ts'o #define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 17872035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_RECOVER| \ 17882035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 17892035e776STheodore Ts'o #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 17902035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 17912035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 17922035e776STheodore Ts'o 1793e2b911c5SDarrick J. Wong #define EXT4_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 17943dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 17953dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_RECOVER| \ 17963dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_META_BG| \ 17973dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_EXTENTS| \ 17983dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_64BIT| \ 1799c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_FLEX_BG| \ 1800f08225d1STao Ma EXT4_FEATURE_INCOMPAT_MMP | \ 18016ddb2447STheodore Ts'o EXT4_FEATURE_INCOMPAT_INLINE_DATA | \ 18028c81bd8fSDarrick J. Wong EXT4_FEATURE_INCOMPAT_ENCRYPT | \ 18038c81bd8fSDarrick J. Wong EXT4_FEATURE_INCOMPAT_CSUM_SEED) 18043dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 18053dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 18063dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ 18073dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ 18083dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ 18093dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ 18106f16b606STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\ 1811e93376c2SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_BIGALLOC |\ 18127c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\ 1813040cb378SLi Xi EXT4_FEATURE_RO_COMPAT_QUOTA |\ 1814040cb378SLi Xi EXT4_FEATURE_RO_COMPAT_PROJECT) 18153dcf5451SChristoph Hellwig 1816e2b911c5SDarrick J. Wong #define EXTN_FEATURE_FUNCS(ver) \ 1817e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_compat_features(struct super_block *sb) \ 1818e2b911c5SDarrick J. Wong { \ 1819e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_compat & \ 1820e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_COMPAT_SUPP)) != 0); \ 1821e2b911c5SDarrick J. Wong } \ 1822e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_ro_compat_features(struct super_block *sb) \ 1823e2b911c5SDarrick J. Wong { \ 1824e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ 1825e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_RO_COMPAT_SUPP)) != 0); \ 1826e2b911c5SDarrick J. Wong } \ 1827e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_incompat_features(struct super_block *sb) \ 1828e2b911c5SDarrick J. Wong { \ 1829e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ 1830e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_INCOMPAT_SUPP)) != 0); \ 1831e2b911c5SDarrick J. Wong } 1832e2b911c5SDarrick J. Wong 1833e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(2) 1834e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(3) 1835e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(4) 1836e2b911c5SDarrick J. Wong 1837e2b911c5SDarrick J. Wong static inline bool ext4_has_compat_features(struct super_block *sb) 1838e2b911c5SDarrick J. Wong { 1839e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_compat != 0); 1840e2b911c5SDarrick J. Wong } 1841e2b911c5SDarrick J. Wong static inline bool ext4_has_ro_compat_features(struct super_block *sb) 1842e2b911c5SDarrick J. Wong { 1843e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_ro_compat != 0); 1844e2b911c5SDarrick J. Wong } 1845e2b911c5SDarrick J. Wong static inline bool ext4_has_incompat_features(struct super_block *sb) 1846e2b911c5SDarrick J. Wong { 1847e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_incompat != 0); 1848e2b911c5SDarrick J. Wong } 1849e2b911c5SDarrick J. Wong 18503dcf5451SChristoph Hellwig /* 18519549a168STheodore Ts'o * Superblock flags 18529549a168STheodore Ts'o */ 18539549a168STheodore Ts'o #define EXT4_FLAGS_RESIZING 0 18540db1ff22STheodore Ts'o #define EXT4_FLAGS_SHUTDOWN 1 18550db1ff22STheodore Ts'o 18560db1ff22STheodore Ts'o static inline int ext4_forced_shutdown(struct ext4_sb_info *sbi) 18570db1ff22STheodore Ts'o { 18580db1ff22STheodore Ts'o return test_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 18590db1ff22STheodore Ts'o } 18609549a168STheodore Ts'o 18619549a168STheodore Ts'o 18629549a168STheodore Ts'o /* 18633dcf5451SChristoph Hellwig * Default values for user and/or group using reserved blocks 18643dcf5451SChristoph Hellwig */ 18653dcf5451SChristoph Hellwig #define EXT4_DEF_RESUID 0 18663dcf5451SChristoph Hellwig #define EXT4_DEF_RESGID 0 18673dcf5451SChristoph Hellwig 1868040cb378SLi Xi /* 1869040cb378SLi Xi * Default project ID 1870040cb378SLi Xi */ 1871040cb378SLi Xi #define EXT4_DEF_PROJID 0 1872040cb378SLi Xi 1873240799cdSTheodore Ts'o #define EXT4_DEF_INODE_READAHEAD_BLKS 32 1874240799cdSTheodore Ts'o 18753dcf5451SChristoph Hellwig /* 18763dcf5451SChristoph Hellwig * Default mount options 18773dcf5451SChristoph Hellwig */ 18783dcf5451SChristoph Hellwig #define EXT4_DEFM_DEBUG 0x0001 18793dcf5451SChristoph Hellwig #define EXT4_DEFM_BSDGROUPS 0x0002 18803dcf5451SChristoph Hellwig #define EXT4_DEFM_XATTR_USER 0x0004 18813dcf5451SChristoph Hellwig #define EXT4_DEFM_ACL 0x0008 18823dcf5451SChristoph Hellwig #define EXT4_DEFM_UID16 0x0010 18833dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE 0x0060 18843dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_DATA 0x0020 18853dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_ORDERED 0x0040 18863dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_WBACK 0x0060 18878b67f04aSTheodore Ts'o #define EXT4_DEFM_NOBARRIER 0x0100 18888b67f04aSTheodore Ts'o #define EXT4_DEFM_BLOCK_VALIDITY 0x0200 18898b67f04aSTheodore Ts'o #define EXT4_DEFM_DISCARD 0x0400 18908b67f04aSTheodore Ts'o #define EXT4_DEFM_NODELALLOC 0x0800 18913dcf5451SChristoph Hellwig 18923dcf5451SChristoph Hellwig /* 189330773840STheodore Ts'o * Default journal batch times 189430773840STheodore Ts'o */ 189530773840STheodore Ts'o #define EXT4_DEF_MIN_BATCH_TIME 0 189630773840STheodore Ts'o #define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ 189730773840STheodore Ts'o 189830773840STheodore Ts'o /* 1899a4912123STheodore Ts'o * Minimum number of groups in a flexgroup before we separate out 1900a4912123STheodore Ts'o * directories into the first block group of a flexgroup 1901a4912123STheodore Ts'o */ 1902a4912123STheodore Ts'o #define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4 1903a4912123STheodore Ts'o 1904a4912123STheodore Ts'o /* 19053dcf5451SChristoph Hellwig * Structure of a directory entry 19063dcf5451SChristoph Hellwig */ 19073dcf5451SChristoph Hellwig #define EXT4_NAME_LEN 255 19083dcf5451SChristoph Hellwig 19093dcf5451SChristoph Hellwig struct ext4_dir_entry { 19103dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 19113dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 19123dcf5451SChristoph Hellwig __le16 name_len; /* Name length */ 19133dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 19143dcf5451SChristoph Hellwig }; 19153dcf5451SChristoph Hellwig 19163dcf5451SChristoph Hellwig /* 19173dcf5451SChristoph Hellwig * The new version of the directory entry. Since EXT4 structures are 19183dcf5451SChristoph Hellwig * stored in intel byte order, and the name_len field could never be 19193dcf5451SChristoph Hellwig * bigger than 255 chars, it's safe to reclaim the extra byte for the 19203dcf5451SChristoph Hellwig * file_type field. 19213dcf5451SChristoph Hellwig */ 19223dcf5451SChristoph Hellwig struct ext4_dir_entry_2 { 19233dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 19243dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 19253dcf5451SChristoph Hellwig __u8 name_len; /* Name length */ 19263dcf5451SChristoph Hellwig __u8 file_type; 19273dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 19283dcf5451SChristoph Hellwig }; 19293dcf5451SChristoph Hellwig 19303dcf5451SChristoph Hellwig /* 1931e6153918SDarrick J. Wong * This is a bogus directory entry at the end of each leaf block that 1932e6153918SDarrick J. Wong * records checksums. 1933e6153918SDarrick J. Wong */ 1934e6153918SDarrick J. Wong struct ext4_dir_entry_tail { 1935e6153918SDarrick J. Wong __le32 det_reserved_zero1; /* Pretend to be unused */ 1936e6153918SDarrick J. Wong __le16 det_rec_len; /* 12 */ 1937e6153918SDarrick J. Wong __u8 det_reserved_zero2; /* Zero name length */ 1938e6153918SDarrick J. Wong __u8 det_reserved_ft; /* 0xDE, fake file type */ 1939e6153918SDarrick J. Wong __le32 det_checksum; /* crc32c(uuid+inum+dirblock) */ 1940e6153918SDarrick J. Wong }; 1941e6153918SDarrick J. Wong 19423c47d541STao Ma #define EXT4_DIRENT_TAIL(block, blocksize) \ 19433c47d541STao Ma ((struct ext4_dir_entry_tail *)(((void *)(block)) + \ 19443c47d541STao Ma ((blocksize) - \ 19453c47d541STao Ma sizeof(struct ext4_dir_entry_tail)))) 19463c47d541STao Ma 1947e6153918SDarrick J. Wong /* 19483dcf5451SChristoph Hellwig * Ext4 directory file types. Only the low 3 bits are used. The 19493dcf5451SChristoph Hellwig * other bits are reserved for now. 19503dcf5451SChristoph Hellwig */ 19513dcf5451SChristoph Hellwig #define EXT4_FT_UNKNOWN 0 19523dcf5451SChristoph Hellwig #define EXT4_FT_REG_FILE 1 19533dcf5451SChristoph Hellwig #define EXT4_FT_DIR 2 19543dcf5451SChristoph Hellwig #define EXT4_FT_CHRDEV 3 19553dcf5451SChristoph Hellwig #define EXT4_FT_BLKDEV 4 19563dcf5451SChristoph Hellwig #define EXT4_FT_FIFO 5 19573dcf5451SChristoph Hellwig #define EXT4_FT_SOCK 6 19583dcf5451SChristoph Hellwig #define EXT4_FT_SYMLINK 7 19593dcf5451SChristoph Hellwig 19603dcf5451SChristoph Hellwig #define EXT4_FT_MAX 8 19613dcf5451SChristoph Hellwig 1962e6153918SDarrick J. Wong #define EXT4_FT_DIR_CSUM 0xDE 1963e6153918SDarrick J. Wong 19643dcf5451SChristoph Hellwig /* 19653dcf5451SChristoph Hellwig * EXT4_DIR_PAD defines the directory entries boundaries 19663dcf5451SChristoph Hellwig * 19673dcf5451SChristoph Hellwig * NOTE: It must be a multiple of 4 19683dcf5451SChristoph Hellwig */ 19693dcf5451SChristoph Hellwig #define EXT4_DIR_PAD 4 19703dcf5451SChristoph Hellwig #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) 19713dcf5451SChristoph Hellwig #define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \ 19723dcf5451SChristoph Hellwig ~EXT4_DIR_ROUND) 19733dcf5451SChristoph Hellwig #define EXT4_MAX_REC_LEN ((1<<16)-1) 19743dcf5451SChristoph Hellwig 19753dcf5451SChristoph Hellwig /* 19760cfc9255SEric Sandeen * If we ever get support for fs block sizes > page_size, we'll need 19770cfc9255SEric Sandeen * to remove the #if statements in the next two functions... 19780cfc9255SEric Sandeen */ 19790cfc9255SEric Sandeen static inline unsigned int 19800cfc9255SEric Sandeen ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize) 19810cfc9255SEric Sandeen { 19820cfc9255SEric Sandeen unsigned len = le16_to_cpu(dlen); 19830cfc9255SEric Sandeen 1984ea1754a0SKirill A. Shutemov #if (PAGE_SIZE >= 65536) 19850cfc9255SEric Sandeen if (len == EXT4_MAX_REC_LEN || len == 0) 19860cfc9255SEric Sandeen return blocksize; 19870cfc9255SEric Sandeen return (len & 65532) | ((len & 3) << 16); 19880cfc9255SEric Sandeen #else 19890cfc9255SEric Sandeen return len; 19900cfc9255SEric Sandeen #endif 19910cfc9255SEric Sandeen } 19920cfc9255SEric Sandeen 19930cfc9255SEric Sandeen static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize) 19940cfc9255SEric Sandeen { 19950cfc9255SEric Sandeen if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3)) 19960cfc9255SEric Sandeen BUG(); 1997ea1754a0SKirill A. Shutemov #if (PAGE_SIZE >= 65536) 19980cfc9255SEric Sandeen if (len < 65536) 19990cfc9255SEric Sandeen return cpu_to_le16(len); 20000cfc9255SEric Sandeen if (len == blocksize) { 20010cfc9255SEric Sandeen if (blocksize == 65536) 20020cfc9255SEric Sandeen return cpu_to_le16(EXT4_MAX_REC_LEN); 20030cfc9255SEric Sandeen else 20040cfc9255SEric Sandeen return cpu_to_le16(0); 20050cfc9255SEric Sandeen } 20060cfc9255SEric Sandeen return cpu_to_le16((len & 65532) | ((len >> 16) & 3)); 20070cfc9255SEric Sandeen #else 20080cfc9255SEric Sandeen return cpu_to_le16(len); 20090cfc9255SEric Sandeen #endif 20100cfc9255SEric Sandeen } 20110cfc9255SEric Sandeen 20120cfc9255SEric Sandeen /* 20133dcf5451SChristoph Hellwig * Hash Tree Directory indexing 20143dcf5451SChristoph Hellwig * (c) Daniel Phillips, 2001 20153dcf5451SChristoph Hellwig */ 20163dcf5451SChristoph Hellwig 2017e2b911c5SDarrick J. Wong #define is_dx(dir) (ext4_has_feature_dir_index((dir)->i_sb) && \ 201812e9b892SDmitry Monakhov ext4_test_inode_flag((dir), EXT4_INODE_INDEX)) 20193dcf5451SChristoph Hellwig #define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX) 20203dcf5451SChristoph Hellwig #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) 20213dcf5451SChristoph Hellwig 20223dcf5451SChristoph Hellwig /* Legal values for the dx_root hash_version field: */ 20233dcf5451SChristoph Hellwig 20243dcf5451SChristoph Hellwig #define DX_HASH_LEGACY 0 20253dcf5451SChristoph Hellwig #define DX_HASH_HALF_MD4 1 20263dcf5451SChristoph Hellwig #define DX_HASH_TEA 2 2027f99b2589STheodore Ts'o #define DX_HASH_LEGACY_UNSIGNED 3 2028f99b2589STheodore Ts'o #define DX_HASH_HALF_MD4_UNSIGNED 4 2029f99b2589STheodore Ts'o #define DX_HASH_TEA_UNSIGNED 5 20303dcf5451SChristoph Hellwig 20310441984aSDarrick J. Wong static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc, 20320441984aSDarrick J. Wong const void *address, unsigned int length) 20330441984aSDarrick J. Wong { 20340441984aSDarrick J. Wong struct { 20350441984aSDarrick J. Wong struct shash_desc shash; 20363108b54bSTheodore Ts'o char ctx[4]; 20370441984aSDarrick J. Wong } desc; 20380441984aSDarrick J. Wong int err; 20390441984aSDarrick J. Wong 20403108b54bSTheodore Ts'o BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx)); 20413108b54bSTheodore Ts'o 20420441984aSDarrick J. Wong desc.shash.tfm = sbi->s_chksum_driver; 20430441984aSDarrick J. Wong desc.shash.flags = 0; 20440441984aSDarrick J. Wong *(u32 *)desc.ctx = crc; 20450441984aSDarrick J. Wong 20460441984aSDarrick J. Wong err = crypto_shash_update(&desc.shash, address, length); 20470441984aSDarrick J. Wong BUG_ON(err); 20480441984aSDarrick J. Wong 20490441984aSDarrick J. Wong return *(u32 *)desc.ctx; 20500441984aSDarrick J. Wong } 20510441984aSDarrick J. Wong 20523dcf5451SChristoph Hellwig #ifdef __KERNEL__ 20533dcf5451SChristoph Hellwig 20543dcf5451SChristoph Hellwig /* hash info structure used by the directory hash */ 20553dcf5451SChristoph Hellwig struct dx_hash_info 20563dcf5451SChristoph Hellwig { 20573dcf5451SChristoph Hellwig u32 hash; 20583dcf5451SChristoph Hellwig u32 minor_hash; 20593dcf5451SChristoph Hellwig int hash_version; 20603dcf5451SChristoph Hellwig u32 *seed; 20613dcf5451SChristoph Hellwig }; 20623dcf5451SChristoph Hellwig 2063d1f5273eSFan Yong 2064d1f5273eSFan Yong /* 32 and 64 bit signed EOF for dx directories */ 2065d1f5273eSFan Yong #define EXT4_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1) 2066d1f5273eSFan Yong #define EXT4_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1) 2067d1f5273eSFan Yong 20683dcf5451SChristoph Hellwig 20693dcf5451SChristoph Hellwig /* 20703dcf5451SChristoph Hellwig * Control parameters used by ext4_htree_next_block 20713dcf5451SChristoph Hellwig */ 20723dcf5451SChristoph Hellwig #define HASH_NB_ALWAYS 1 20733dcf5451SChristoph Hellwig 20745b643f9cSTheodore Ts'o struct ext4_filename { 20755b643f9cSTheodore Ts'o const struct qstr *usr_fname; 2076a7550b30SJaegeuk Kim struct fscrypt_str disk_name; 20775b643f9cSTheodore Ts'o struct dx_hash_info hinfo; 20785b643f9cSTheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 2079a7550b30SJaegeuk Kim struct fscrypt_str crypto_buf; 20805b643f9cSTheodore Ts'o #endif 20815b643f9cSTheodore Ts'o }; 20825b643f9cSTheodore Ts'o 20835b643f9cSTheodore Ts'o #define fname_name(p) ((p)->disk_name.name) 20845b643f9cSTheodore Ts'o #define fname_len(p) ((p)->disk_name.len) 20853dcf5451SChristoph Hellwig 20863dcf5451SChristoph Hellwig /* 20873dcf5451SChristoph Hellwig * Describe an inode's exact location on disk and in memory 20883dcf5451SChristoph Hellwig */ 20893dcf5451SChristoph Hellwig struct ext4_iloc 20903dcf5451SChristoph Hellwig { 20913dcf5451SChristoph Hellwig struct buffer_head *bh; 20923dcf5451SChristoph Hellwig unsigned long offset; 20933dcf5451SChristoph Hellwig ext4_group_t block_group; 20943dcf5451SChristoph Hellwig }; 20953dcf5451SChristoph Hellwig 20963dcf5451SChristoph Hellwig static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) 20973dcf5451SChristoph Hellwig { 20983dcf5451SChristoph Hellwig return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); 20993dcf5451SChristoph Hellwig } 21003dcf5451SChristoph Hellwig 21013dcf5451SChristoph Hellwig /* 21023dcf5451SChristoph Hellwig * This structure is stuffed into the struct file's private_data field 21033dcf5451SChristoph Hellwig * for directories. It is where we put information so that we can do 21043dcf5451SChristoph Hellwig * readdir operations in hash tree order. 21053dcf5451SChristoph Hellwig */ 21063dcf5451SChristoph Hellwig struct dir_private_info { 21073dcf5451SChristoph Hellwig struct rb_root root; 21083dcf5451SChristoph Hellwig struct rb_node *curr_node; 21093dcf5451SChristoph Hellwig struct fname *extra_fname; 21103dcf5451SChristoph Hellwig loff_t last_pos; 21113dcf5451SChristoph Hellwig __u32 curr_hash; 21123dcf5451SChristoph Hellwig __u32 curr_minor_hash; 21133dcf5451SChristoph Hellwig __u32 next_hash; 21143dcf5451SChristoph Hellwig }; 21153dcf5451SChristoph Hellwig 21163dcf5451SChristoph Hellwig /* calculate the first block number of the group */ 21173dcf5451SChristoph Hellwig static inline ext4_fsblk_t 21183dcf5451SChristoph Hellwig ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) 21193dcf5451SChristoph Hellwig { 21203dcf5451SChristoph Hellwig return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + 21213dcf5451SChristoph Hellwig le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); 21223dcf5451SChristoph Hellwig } 21233dcf5451SChristoph Hellwig 21243dcf5451SChristoph Hellwig /* 21253dcf5451SChristoph Hellwig * Special error return code only used by dx_probe() and its callers. 21263dcf5451SChristoph Hellwig */ 212736de9286STheodore Ts'o #define ERR_BAD_DX_DIR (-(MAX_ERRNO - 1)) 21283dcf5451SChristoph Hellwig 21293dcf5451SChristoph Hellwig /* 2130bfff6873SLukas Czerner * Timeout and state flag for lazy initialization inode thread. 2131bfff6873SLukas Czerner */ 2132bfff6873SLukas Czerner #define EXT4_DEF_LI_WAIT_MULT 10 2133bfff6873SLukas Czerner #define EXT4_DEF_LI_MAX_START_DELAY 5 2134bfff6873SLukas Czerner #define EXT4_LAZYINIT_QUIT 0x0001 2135bfff6873SLukas Czerner #define EXT4_LAZYINIT_RUNNING 0x0002 2136bfff6873SLukas Czerner 2137bfff6873SLukas Czerner /* 2138bfff6873SLukas Czerner * Lazy inode table initialization info 2139bfff6873SLukas Czerner */ 2140bfff6873SLukas Czerner struct ext4_lazy_init { 2141bfff6873SLukas Czerner unsigned long li_state; 2142bfff6873SLukas Czerner struct list_head li_request_list; 2143bfff6873SLukas Czerner struct mutex li_list_mtx; 2144bfff6873SLukas Czerner }; 2145bfff6873SLukas Czerner 2146bfff6873SLukas Czerner struct ext4_li_request { 2147bfff6873SLukas Czerner struct super_block *lr_super; 2148bfff6873SLukas Czerner struct ext4_sb_info *lr_sbi; 2149bfff6873SLukas Czerner ext4_group_t lr_next_group; 2150bfff6873SLukas Czerner struct list_head lr_request; 2151bfff6873SLukas Czerner unsigned long lr_next_sched; 2152bfff6873SLukas Czerner unsigned long lr_timeout; 2153bfff6873SLukas Czerner }; 2154bfff6873SLukas Czerner 2155857ac889SLukas Czerner struct ext4_features { 2156857ac889SLukas Czerner struct kobject f_kobj; 2157857ac889SLukas Czerner struct completion f_kobj_unregister; 2158857ac889SLukas Czerner }; 2159857ac889SLukas Czerner 2160bfff6873SLukas Czerner /* 2161c5e06d10SJohann Lombardi * This structure will be used for multiple mount protection. It will be 2162c5e06d10SJohann Lombardi * written into the block number saved in the s_mmp_block field in the 2163c5e06d10SJohann Lombardi * superblock. Programs that check MMP should assume that if 2164c5e06d10SJohann Lombardi * SEQ_FSCK (or any unknown code above SEQ_MAX) is present then it is NOT safe 2165c5e06d10SJohann Lombardi * to use the filesystem, regardless of how old the timestamp is. 2166c5e06d10SJohann Lombardi */ 2167c5e06d10SJohann Lombardi #define EXT4_MMP_MAGIC 0x004D4D50U /* ASCII for MMP */ 2168c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U /* mmp_seq value for clean unmount */ 2169c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_FSCK 0xE24D4D50U /* mmp_seq value when being fscked */ 2170c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_MAX 0xE24D4D4FU /* maximum valid mmp_seq value */ 2171c5e06d10SJohann Lombardi 2172c5e06d10SJohann Lombardi struct mmp_struct { 2173c5e06d10SJohann Lombardi __le32 mmp_magic; /* Magic number for MMP */ 2174c5e06d10SJohann Lombardi __le32 mmp_seq; /* Sequence no. updated periodically */ 2175c5e06d10SJohann Lombardi 2176c5e06d10SJohann Lombardi /* 2177c5e06d10SJohann Lombardi * mmp_time, mmp_nodename & mmp_bdevname are only used for information 2178c5e06d10SJohann Lombardi * purposes and do not affect the correctness of the algorithm 2179c5e06d10SJohann Lombardi */ 2180c5e06d10SJohann Lombardi __le64 mmp_time; /* Time last updated */ 2181c5e06d10SJohann Lombardi char mmp_nodename[64]; /* Node which last updated MMP block */ 2182c5e06d10SJohann Lombardi char mmp_bdevname[32]; /* Bdev which last updated MMP block */ 2183c5e06d10SJohann Lombardi 2184c5e06d10SJohann Lombardi /* 2185c5e06d10SJohann Lombardi * mmp_check_interval is used to verify if the MMP block has been 2186c5e06d10SJohann Lombardi * updated on the block device. The value is updated based on the 2187c5e06d10SJohann Lombardi * maximum time to write the MMP block during an update cycle. 2188c5e06d10SJohann Lombardi */ 2189c5e06d10SJohann Lombardi __le16 mmp_check_interval; 2190c5e06d10SJohann Lombardi 2191c5e06d10SJohann Lombardi __le16 mmp_pad1; 2192e6153918SDarrick J. Wong __le32 mmp_pad2[226]; 2193e6153918SDarrick J. Wong __le32 mmp_checksum; /* crc32c(uuid+mmp_block) */ 2194c5e06d10SJohann Lombardi }; 2195c5e06d10SJohann Lombardi 2196c5e06d10SJohann Lombardi /* arguments passed to the mmp thread */ 2197c5e06d10SJohann Lombardi struct mmpd_data { 2198c5e06d10SJohann Lombardi struct buffer_head *bh; /* bh from initial read_mmp_block() */ 2199c5e06d10SJohann Lombardi struct super_block *sb; /* super block of the fs */ 2200c5e06d10SJohann Lombardi }; 2201c5e06d10SJohann Lombardi 2202c5e06d10SJohann Lombardi /* 2203c5e06d10SJohann Lombardi * Check interval multiplier 2204c5e06d10SJohann Lombardi * The MMP block is written every update interval and initially checked every 2205c5e06d10SJohann Lombardi * update interval x the multiplier (the value is then adapted based on the 2206c5e06d10SJohann Lombardi * write latency). The reason is that writes can be delayed under load and we 2207c5e06d10SJohann Lombardi * don't want readers to incorrectly assume that the filesystem is no longer 2208c5e06d10SJohann Lombardi * in use. 2209c5e06d10SJohann Lombardi */ 2210c5e06d10SJohann Lombardi #define EXT4_MMP_CHECK_MULT 2UL 2211c5e06d10SJohann Lombardi 2212c5e06d10SJohann Lombardi /* 2213c5e06d10SJohann Lombardi * Minimum interval for MMP checking in seconds. 2214c5e06d10SJohann Lombardi */ 2215c5e06d10SJohann Lombardi #define EXT4_MMP_MIN_CHECK_INTERVAL 5UL 2216c5e06d10SJohann Lombardi 2217c5e06d10SJohann Lombardi /* 2218c5e06d10SJohann Lombardi * Maximum interval for MMP checking in seconds. 2219c5e06d10SJohann Lombardi */ 2220c5e06d10SJohann Lombardi #define EXT4_MMP_MAX_CHECK_INTERVAL 300UL 2221c5e06d10SJohann Lombardi 2222c5e06d10SJohann Lombardi /* 22233dcf5451SChristoph Hellwig * Function prototypes 22243dcf5451SChristoph Hellwig */ 22253dcf5451SChristoph Hellwig 22263dcf5451SChristoph Hellwig /* 22273dcf5451SChristoph Hellwig * Ok, these declarations are also in <linux/kernel.h> but none of the 22283dcf5451SChristoph Hellwig * ext4 source programs needs to include it so they are duplicated here. 22293dcf5451SChristoph Hellwig */ 22303dcf5451SChristoph Hellwig # define NORET_TYPE /**/ 22313dcf5451SChristoph Hellwig # define ATTRIB_NORET __attribute__((noreturn)) 22323dcf5451SChristoph Hellwig # define NORET_AND noreturn, 22333dcf5451SChristoph Hellwig 2234498e5f24STheodore Ts'o /* bitmap.c */ 2235f6fb99caSTheodore Ts'o extern unsigned int ext4_count_free(char *bitmap, unsigned numchars); 223641a246d1SDarrick J. Wong void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 223741a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 223841a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 223941a246d1SDarrick J. Wong int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 224041a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 224141a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 2242fa77dcfaSDarrick J. Wong void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 2243fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 224479f1ba49STao Ma struct buffer_head *bh); 2245fa77dcfaSDarrick J. Wong int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 2246fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 224779f1ba49STao Ma struct buffer_head *bh); 2248498e5f24STheodore Ts'o 22493dcf5451SChristoph Hellwig /* balloc.c */ 2250bd86298eSLukas Czerner extern void ext4_get_group_no_and_offset(struct super_block *sb, 2251bd86298eSLukas Czerner ext4_fsblk_t blocknr, 2252bd86298eSLukas Czerner ext4_group_t *blockgrpp, 2253bd86298eSLukas Czerner ext4_grpblk_t *offsetp); 2254bd86298eSLukas Czerner extern ext4_group_t ext4_get_group_number(struct super_block *sb, 2255bd86298eSLukas Czerner ext4_fsblk_t block); 2256bd86298eSLukas Czerner 22573dcf5451SChristoph Hellwig extern unsigned int ext4_block_group(struct super_block *sb, 22583dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 22593dcf5451SChristoph Hellwig extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, 22603dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 22613dcf5451SChristoph Hellwig extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); 22623dcf5451SChristoph Hellwig extern unsigned long ext4_bg_num_gdb(struct super_block *sb, 22633dcf5451SChristoph Hellwig ext4_group_t group); 22647061eba7SAneesh Kumar K.V extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, 226555f020dbSAllison Henderson ext4_fsblk_t goal, 226655f020dbSAllison Henderson unsigned int flags, 226755f020dbSAllison Henderson unsigned long *count, 226855f020dbSAllison Henderson int *errp); 2269e7d5f315STheodore Ts'o extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi, 2270e7d5f315STheodore Ts'o s64 nclusters, unsigned int flags); 22715dee5437STheodore Ts'o extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *); 22723dcf5451SChristoph Hellwig extern void ext4_check_blocks_bitmap(struct super_block *); 22733dcf5451SChristoph Hellwig extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, 22743dcf5451SChristoph Hellwig ext4_group_t block_group, 22753dcf5451SChristoph Hellwig struct buffer_head ** bh); 22763dcf5451SChristoph Hellwig extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); 2277813e5727STheodore Ts'o 2278813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb, 2279813e5727STheodore Ts'o ext4_group_t block_group); 2280813e5727STheodore Ts'o extern int ext4_wait_block_bitmap(struct super_block *sb, 2281813e5727STheodore Ts'o ext4_group_t block_group, 2282813e5727STheodore Ts'o struct buffer_head *bh); 2283813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, 2284bb23c20aSTheodore Ts'o ext4_group_t block_group); 2285cff1dfd7STheodore Ts'o extern unsigned ext4_free_clusters_after_init(struct super_block *sb, 2286fd034a84STheodore Ts'o ext4_group_t block_group, 2287fd034a84STheodore Ts'o struct ext4_group_desc *gdp); 2288f86186b4SEric Sandeen ext4_fsblk_t ext4_inode_to_goal_block(struct inode *); 22893dcf5451SChristoph Hellwig 2290a7550b30SJaegeuk Kim static inline bool ext4_encrypted_inode(struct inode *inode) 2291d5d0e8c7SMichael Halcrow { 2292a7550b30SJaegeuk Kim return ext4_test_inode_flag(inode, EXT4_INODE_ENCRYPT); 2293d5d0e8c7SMichael Halcrow } 2294a7550b30SJaegeuk Kim 2295a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 2296a7550b30SJaegeuk Kim static inline int ext4_fname_setup_filename(struct inode *dir, 2297a7550b30SJaegeuk Kim const struct qstr *iname, 2298a7550b30SJaegeuk Kim int lookup, struct ext4_filename *fname) 2299a7550b30SJaegeuk Kim { 2300a7550b30SJaegeuk Kim struct fscrypt_name name; 2301a7550b30SJaegeuk Kim int err; 2302a7550b30SJaegeuk Kim 2303a7550b30SJaegeuk Kim memset(fname, 0, sizeof(struct ext4_filename)); 2304a7550b30SJaegeuk Kim 2305a7550b30SJaegeuk Kim err = fscrypt_setup_filename(dir, iname, lookup, &name); 2306a7550b30SJaegeuk Kim 2307a7550b30SJaegeuk Kim fname->usr_fname = name.usr_fname; 2308a7550b30SJaegeuk Kim fname->disk_name = name.disk_name; 2309a7550b30SJaegeuk Kim fname->hinfo.hash = name.hash; 2310a7550b30SJaegeuk Kim fname->hinfo.minor_hash = name.minor_hash; 2311a7550b30SJaegeuk Kim fname->crypto_buf = name.crypto_buf; 2312a7550b30SJaegeuk Kim return err; 2313a7550b30SJaegeuk Kim } 2314a7550b30SJaegeuk Kim 2315a7550b30SJaegeuk Kim static inline void ext4_fname_free_filename(struct ext4_filename *fname) 2316a7550b30SJaegeuk Kim { 2317a7550b30SJaegeuk Kim struct fscrypt_name name; 2318a7550b30SJaegeuk Kim 2319a7550b30SJaegeuk Kim name.crypto_buf = fname->crypto_buf; 2320a7550b30SJaegeuk Kim fscrypt_free_filename(&name); 2321a7550b30SJaegeuk Kim 2322a7550b30SJaegeuk Kim fname->crypto_buf.name = NULL; 2323a7550b30SJaegeuk Kim fname->usr_fname = NULL; 2324a7550b30SJaegeuk Kim fname->disk_name.name = NULL; 2325a7550b30SJaegeuk Kim } 2326a7550b30SJaegeuk Kim #else 23275b643f9cSTheodore Ts'o static inline int ext4_fname_setup_filename(struct inode *dir, 23285b643f9cSTheodore Ts'o const struct qstr *iname, 23295b643f9cSTheodore Ts'o int lookup, struct ext4_filename *fname) 23305b643f9cSTheodore Ts'o { 23315b643f9cSTheodore Ts'o fname->usr_fname = iname; 23325b643f9cSTheodore Ts'o fname->disk_name.name = (unsigned char *) iname->name; 23335b643f9cSTheodore Ts'o fname->disk_name.len = iname->len; 23345b643f9cSTheodore Ts'o return 0; 23355b643f9cSTheodore Ts'o } 23365b643f9cSTheodore Ts'o static inline void ext4_fname_free_filename(struct ext4_filename *fname) { } 2337a7550b30SJaegeuk Kim 2338d5d0e8c7SMichael Halcrow #endif 2339d5d0e8c7SMichael Halcrow 23403dcf5451SChristoph Hellwig /* dir.c */ 234160fd4da3STheodore Ts'o extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *, 2342f7c21177STheodore Ts'o struct file *, 23433dcf5451SChristoph Hellwig struct ext4_dir_entry_2 *, 2344226ba972STao Ma struct buffer_head *, char *, int, 2345226ba972STao Ma unsigned int); 2346226ba972STao Ma #define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \ 2347f7c21177STheodore Ts'o unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \ 2348226ba972STao Ma (de), (bh), (buf), (size), (offset))) 23493dcf5451SChristoph Hellwig extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, 23503dcf5451SChristoph Hellwig __u32 minor_hash, 23512f61830aSTheodore Ts'o struct ext4_dir_entry_2 *dirent, 2352a7550b30SJaegeuk Kim struct fscrypt_str *ent_name); 23533dcf5451SChristoph Hellwig extern void ext4_htree_free_dir_info(struct dir_private_info *p); 2354978fef91STao Ma extern int ext4_find_dest_de(struct inode *dir, struct inode *inode, 2355978fef91STao Ma struct buffer_head *bh, 2356978fef91STao Ma void *buf, int buf_size, 23575b643f9cSTheodore Ts'o struct ext4_filename *fname, 2358978fef91STao Ma struct ext4_dir_entry_2 **dest_de); 23594bdfc873SMichael Halcrow int ext4_insert_dentry(struct inode *dir, 23604bdfc873SMichael Halcrow struct inode *inode, 2361978fef91STao Ma struct ext4_dir_entry_2 *de, 2362978fef91STao Ma int buf_size, 23635b643f9cSTheodore Ts'o struct ext4_filename *fname); 2364978fef91STao Ma static inline void ext4_update_dx_flag(struct inode *inode) 2365978fef91STao Ma { 2366e2b911c5SDarrick J. Wong if (!ext4_has_feature_dir_index(inode->i_sb)) 2367978fef91STao Ma ext4_clear_inode_flag(inode, EXT4_INODE_INDEX); 2368978fef91STao Ma } 236965d165d9STao Ma static unsigned char ext4_filetype_table[] = { 237065d165d9STao Ma DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK 237165d165d9STao Ma }; 237265d165d9STao Ma 237365d165d9STao Ma static inline unsigned char get_dtype(struct super_block *sb, int filetype) 237465d165d9STao Ma { 2375e2b911c5SDarrick J. Wong if (!ext4_has_feature_filetype(sb) || filetype >= EXT4_FT_MAX) 237665d165d9STao Ma return DT_UNKNOWN; 237765d165d9STao Ma 237865d165d9STao Ma return ext4_filetype_table[filetype]; 237965d165d9STao Ma } 238040b163f1SDarrick J. Wong extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh, 238140b163f1SDarrick J. Wong void *buf, int buf_size); 23823dcf5451SChristoph Hellwig 23833dcf5451SChristoph Hellwig /* fsync.c */ 238402c24a82SJosef Bacik extern int ext4_sync_file(struct file *, loff_t, loff_t, int); 23853dcf5451SChristoph Hellwig 23863dcf5451SChristoph Hellwig /* hash.c */ 23873dcf5451SChristoph Hellwig extern int ext4fs_dirhash(const char *name, int len, struct 23883dcf5451SChristoph Hellwig dx_hash_info *hinfo); 23893dcf5451SChristoph Hellwig 23903dcf5451SChristoph Hellwig /* ialloc.c */ 23911139575aSTheodore Ts'o extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t, 23925cb81dabSDmitry Monakhov const struct qstr *qstr, __u32 goal, 23931139575aSTheodore Ts'o uid_t *owner, int handle_type, 23941139575aSTheodore Ts'o unsigned int line_no, int nblocks); 23951139575aSTheodore Ts'o 23961139575aSTheodore Ts'o #define ext4_new_inode(handle, dir, mode, qstr, goal, owner) \ 23971139575aSTheodore Ts'o __ext4_new_inode((handle), (dir), (mode), (qstr), (goal), (owner), \ 23981139575aSTheodore Ts'o 0, 0, 0) 23991139575aSTheodore Ts'o #define ext4_new_inode_start_handle(dir, mode, qstr, goal, owner, \ 24001139575aSTheodore Ts'o type, nblocks) \ 24011139575aSTheodore Ts'o __ext4_new_inode(NULL, (dir), (mode), (qstr), (goal), (owner), \ 24021139575aSTheodore Ts'o (type), __LINE__, (nblocks)) 24031139575aSTheodore Ts'o 24041139575aSTheodore Ts'o 24053dcf5451SChristoph Hellwig extern void ext4_free_inode(handle_t *, struct inode *); 24063dcf5451SChristoph Hellwig extern struct inode * ext4_orphan_get(struct super_block *, unsigned long); 24073dcf5451SChristoph Hellwig extern unsigned long ext4_count_free_inodes(struct super_block *); 24083dcf5451SChristoph Hellwig extern unsigned long ext4_count_dirs(struct super_block *); 24093dcf5451SChristoph Hellwig extern void ext4_check_inodes_bitmap(struct super_block *); 241061d08673STheodore Ts'o extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap); 2411bfff6873SLukas Czerner extern int ext4_init_inode_table(struct super_block *sb, 2412bfff6873SLukas Czerner ext4_group_t group, int barrier); 2413813e5727STheodore Ts'o extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate); 24143dcf5451SChristoph Hellwig 24153dcf5451SChristoph Hellwig /* mballoc.c */ 2416ebd173beSTheodore Ts'o extern const struct file_operations ext4_seq_mb_groups_fops; 24173dcf5451SChristoph Hellwig extern long ext4_mb_stats; 24183dcf5451SChristoph Hellwig extern long ext4_mb_max_to_scan; 24199d99012fSAkira Fujita extern int ext4_mb_init(struct super_block *); 24203dcf5451SChristoph Hellwig extern int ext4_mb_release(struct super_block *); 24213dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, 24223dcf5451SChristoph Hellwig struct ext4_allocation_request *, int *); 24233dcf5451SChristoph Hellwig extern int ext4_mb_reserve_blocks(struct super_block *, int); 2424c2ea3fdeSTheodore Ts'o extern void ext4_discard_preallocations(struct inode *); 24255dabfc78STheodore Ts'o extern int __init ext4_init_mballoc(void); 24265dabfc78STheodore Ts'o extern void ext4_exit_mballoc(void); 242744338711STheodore Ts'o extern void ext4_free_blocks(handle_t *handle, struct inode *inode, 2428e6362609STheodore Ts'o struct buffer_head *bh, ext4_fsblk_t block, 2429e6362609STheodore Ts'o unsigned long count, int flags); 243028623c2fSTheodore Ts'o extern int ext4_mb_alloc_groupinfo(struct super_block *sb, 243128623c2fSTheodore Ts'o ext4_group_t ngroups); 2432920313a7SAneesh Kumar K.V extern int ext4_mb_add_groupinfo(struct super_block *sb, 24335f21b0e6SFrederic Bohe ext4_group_t i, struct ext4_group_desc *desc); 2434cc7365dfSYongqiang Yang extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, 24352846e820SAmir Goldstein ext4_fsblk_t block, unsigned long count); 24367360d173SLukas Czerner extern int ext4_trim_fs(struct super_block *, struct fstrim_range *); 24377360d173SLukas Czerner 24383dcf5451SChristoph Hellwig /* inode.c */ 2439f348c252STheodore Ts'o int ext4_inode_is_fast_symlink(struct inode *inode); 244010560082STheodore Ts'o struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int); 24411c215028STheodore Ts'o struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int); 2442705965bdSJan Kara int ext4_get_block_unwritten(struct inode *inode, sector_t iblock, 2443f19d5870STao Ma struct buffer_head *bh_result, int create); 24446873fa0dSEric Sandeen int ext4_get_block(struct inode *inode, sector_t iblock, 24456873fa0dSEric Sandeen struct buffer_head *bh_result, int create); 2446705965bdSJan Kara int ext4_dio_get_block(struct inode *inode, sector_t iblock, 2447705965bdSJan Kara struct buffer_head *bh_result, int create); 24489c3569b5STao Ma int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, 24499c3569b5STao Ma struct buffer_head *bh, int create); 2450f19d5870STao Ma int ext4_walk_page_buffers(handle_t *handle, 2451f19d5870STao Ma struct buffer_head *head, 2452f19d5870STao Ma unsigned from, 2453f19d5870STao Ma unsigned to, 2454f19d5870STao Ma int *partial, 2455f19d5870STao Ma int (*fn)(handle_t *handle, 2456f19d5870STao Ma struct buffer_head *bh)); 2457f19d5870STao Ma int do_journal_get_write_access(handle_t *handle, 2458f19d5870STao Ma struct buffer_head *bh); 24599c3569b5STao Ma #define FALL_BACK_TO_NONDELALLOC 1 24609c3569b5STao Ma #define CONVERT_INLINE_DATA 2 24613dcf5451SChristoph Hellwig 24623dcf5451SChristoph Hellwig extern struct inode *ext4_iget(struct super_block *, unsigned long); 2463f4bb2981STheodore Ts'o extern struct inode *ext4_iget_normal(struct super_block *, unsigned long); 2464a9185b41SChristoph Hellwig extern int ext4_write_inode(struct inode *, struct writeback_control *); 24653dcf5451SChristoph Hellwig extern int ext4_setattr(struct dentry *, struct iattr *); 2466a528d35eSDavid Howells extern int ext4_getattr(const struct path *, struct kstat *, u32, unsigned int); 24670930fcc1SAl Viro extern void ext4_evict_inode(struct inode *); 24680930fcc1SAl Viro extern void ext4_clear_inode(struct inode *); 246999652ea5SDavid Howells extern int ext4_file_getattr(const struct path *, struct kstat *, u32, unsigned int); 24703dcf5451SChristoph Hellwig extern int ext4_sync_inode(handle_t *, struct inode *); 2471aa385729SChristoph Hellwig extern void ext4_dirty_inode(struct inode *, int); 24723dcf5451SChristoph Hellwig extern int ext4_change_inode_journal_flag(struct inode *, int); 24733dcf5451SChristoph Hellwig extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); 2474a361293fSJan Kara extern int ext4_inode_attach_jinode(struct inode *inode); 247591ef4cafSDuane Griffin extern int ext4_can_truncate(struct inode *inode); 24762c98eb5eSTheodore Ts'o extern int ext4_truncate(struct inode *); 2477aeb2817aSAshish Sangwan extern int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length); 2478487caeefSJan Kara extern int ext4_truncate_restart_trans(handle_t *, struct inode *, int nblocks); 24793dcf5451SChristoph Hellwig extern void ext4_set_inode_flags(struct inode *); 24803dcf5451SChristoph Hellwig extern void ext4_get_inode_flags(struct ext4_inode_info *); 2481ccd2506bSTheodore Ts'o extern int ext4_alloc_da_blocks(struct inode *inode); 24823dcf5451SChristoph Hellwig extern void ext4_set_aops(struct inode *inode); 24833dcf5451SChristoph Hellwig extern int ext4_writepage_trans_blocks(struct inode *); 2484f3bd1f3fSMingming Cao extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); 2485a87dd18cSLukas Czerner extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode, 2486a87dd18cSLukas Czerner loff_t lstart, loff_t lend); 248711bac800SDave Jiang extern int ext4_page_mkwrite(struct vm_fault *vmf); 248811bac800SDave Jiang extern int ext4_filemap_fault(struct vm_fault *vmf); 2489a9e7f447SDmitry Monakhov extern qsize_t *ext4_get_reserved_space(struct inode *inode); 2490040cb378SLi Xi extern int ext4_get_projid(struct inode *inode, kprojid_t *projid); 24915f634d06SAneesh Kumar K.V extern void ext4_da_update_reserve_space(struct inode *inode, 24925f634d06SAneesh Kumar K.V int used, int quota_claim); 249353085facSJan Kara extern int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk, 249453085facSJan Kara ext4_fsblk_t pblk, ext4_lblk_t len); 24952d90c160SJan Kara extern int ext4_get_next_extent(struct inode *inode, ext4_lblk_t lblk, 24962d90c160SJan Kara unsigned int map_len, 24972d90c160SJan Kara struct extent_status *result); 2498dae1e52cSAmir Goldstein 2499dae1e52cSAmir Goldstein /* indirect.c */ 2500dae1e52cSAmir Goldstein extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, 2501dae1e52cSAmir Goldstein struct ext4_map_blocks *map, int flags); 2502dae1e52cSAmir Goldstein extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock); 2503fa55a0edSJan Kara extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks); 2504819c4920STheodore Ts'o extern void ext4_ind_truncate(handle_t *, struct inode *inode); 25054f579ae7SLukas Czerner extern int ext4_ind_remove_space(handle_t *handle, struct inode *inode, 25064f579ae7SLukas Czerner ext4_lblk_t start, ext4_lblk_t end); 2507ff9893dcSAmir Goldstein 25083dcf5451SChristoph Hellwig /* ioctl.c */ 25093dcf5451SChristoph Hellwig extern long ext4_ioctl(struct file *, unsigned int, unsigned long); 25103dcf5451SChristoph Hellwig extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long); 25113dcf5451SChristoph Hellwig 25123dcf5451SChristoph Hellwig /* migrate.c */ 25132a43a878SAneesh Kumar K.V extern int ext4_ext_migrate(struct inode *); 25140d14b098SLukas Czerner extern int ext4_ind_migrate(struct inode *inode); 25153d0518f4SWei Yongjun 25163dcf5451SChristoph Hellwig /* namei.c */ 2517b0336e8dSDarrick J. Wong extern int ext4_dirent_csum_verify(struct inode *inode, 2518b0336e8dSDarrick J. Wong struct ext4_dir_entry *dirent); 25193dcf5451SChristoph Hellwig extern int ext4_orphan_add(handle_t *, struct inode *); 25203dcf5451SChristoph Hellwig extern int ext4_orphan_del(handle_t *, struct inode *); 25213dcf5451SChristoph Hellwig extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, 25223dcf5451SChristoph Hellwig __u32 start_minor_hash, __u32 *next_hash); 25235b643f9cSTheodore Ts'o extern int ext4_search_dir(struct buffer_head *bh, 25247335cd3bSTao Ma char *search_buf, 25257335cd3bSTao Ma int buf_size, 25267335cd3bSTao Ma struct inode *dir, 25275b643f9cSTheodore Ts'o struct ext4_filename *fname, 25287335cd3bSTao Ma const struct qstr *d_name, 25297335cd3bSTao Ma unsigned int offset, 25307335cd3bSTao Ma struct ext4_dir_entry_2 **res_dir); 253105019a9eSTao Ma extern int ext4_generic_delete_entry(handle_t *handle, 253205019a9eSTao Ma struct inode *dir, 253305019a9eSTao Ma struct ext4_dir_entry_2 *de_del, 253405019a9eSTao Ma struct buffer_head *bh, 253505019a9eSTao Ma void *entry_buf, 253605019a9eSTao Ma int buf_size, 253705019a9eSTao Ma int csum_size); 2538a7550b30SJaegeuk Kim extern bool ext4_empty_dir(struct inode *inode); 25393dcf5451SChristoph Hellwig 25403dcf5451SChristoph Hellwig /* resize.c */ 25413dcf5451SChristoph Hellwig extern int ext4_group_add(struct super_block *sb, 25423dcf5451SChristoph Hellwig struct ext4_new_group_data *input); 25433dcf5451SChristoph Hellwig extern int ext4_group_extend(struct super_block *sb, 25443dcf5451SChristoph Hellwig struct ext4_super_block *es, 25453dcf5451SChristoph Hellwig ext4_fsblk_t n_blocks_count); 254619c5246dSYongqiang Yang extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count); 25473dcf5451SChristoph Hellwig 25483dcf5451SChristoph Hellwig /* super.c */ 2549ebd173beSTheodore Ts'o extern int ext4_seq_options_show(struct seq_file *seq, void *offset); 2550952fc18eSTheodore Ts'o extern int ext4_calculate_overhead(struct super_block *sb); 255106db49e6STheodore Ts'o extern void ext4_superblock_csum_set(struct super_block *sb); 25529933fc0aSTheodore Ts'o extern void *ext4_kvmalloc(size_t size, gfp_t flags); 25539933fc0aSTheodore Ts'o extern void *ext4_kvzalloc(size_t size, gfp_t flags); 2554117fff10STheodore Ts'o extern int ext4_alloc_flex_bg_array(struct super_block *sb, 2555117fff10STheodore Ts'o ext4_group_t ngroup); 2556722887ddSTheodore Ts'o extern const char *ext4_decode_error(struct super_block *sb, int errno, 2557722887ddSTheodore Ts'o char nbuf[16]); 2558e7c96e8eSJoe Perches 2559b9075fa9SJoe Perches extern __printf(4, 5) 2560b9075fa9SJoe Perches void __ext4_error(struct super_block *, const char *, unsigned int, 2561b9075fa9SJoe Perches const char *, ...); 2562b9075fa9SJoe Perches extern __printf(5, 6) 2563e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *, const char *, unsigned int, ext4_fsblk_t, 2564b9075fa9SJoe Perches const char *, ...); 2565b9075fa9SJoe Perches extern __printf(5, 6) 2566e7c96e8eSJoe Perches void __ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t, 2567b9075fa9SJoe Perches const char *, ...); 2568c398eda0STheodore Ts'o extern void __ext4_std_error(struct super_block *, const char *, 2569c398eda0STheodore Ts'o unsigned int, int); 2570b9075fa9SJoe Perches extern __printf(4, 5) 2571b9075fa9SJoe Perches void __ext4_abort(struct super_block *, const char *, unsigned int, 2572b9075fa9SJoe Perches const char *, ...); 2573b9075fa9SJoe Perches extern __printf(4, 5) 2574b9075fa9SJoe Perches void __ext4_warning(struct super_block *, const char *, unsigned int, 2575b9075fa9SJoe Perches const char *, ...); 2576b03a2f7eSAndreas Dilger extern __printf(4, 5) 2577b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 2578b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...); 2579b9075fa9SJoe Perches extern __printf(3, 4) 2580e7c96e8eSJoe Perches void __ext4_msg(struct super_block *, const char *, const char *, ...); 2581c5e06d10SJohann Lombardi extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp, 2582c5e06d10SJohann Lombardi const char *, unsigned int, const char *); 2583b9075fa9SJoe Perches extern __printf(7, 8) 2584b9075fa9SJoe Perches void __ext4_grp_locked_error(const char *, unsigned int, 2585b9075fa9SJoe Perches struct super_block *, ext4_group_t, 2586b9075fa9SJoe Perches unsigned long, ext4_fsblk_t, 2587b9075fa9SJoe Perches const char *, ...); 2588e7c96e8eSJoe Perches 2589b03a2f7eSAndreas Dilger #define EXT4_ERROR_INODE(inode, fmt, a...) \ 2590b03a2f7eSAndreas Dilger ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a) 2591b03a2f7eSAndreas Dilger 2592b03a2f7eSAndreas Dilger #define EXT4_ERROR_INODE_BLOCK(inode, block, fmt, a...) \ 2593b03a2f7eSAndreas Dilger ext4_error_inode((inode), __func__, __LINE__, (block), (fmt), ## a) 2594b03a2f7eSAndreas Dilger 2595b03a2f7eSAndreas Dilger #define EXT4_ERROR_FILE(file, block, fmt, a...) \ 2596b03a2f7eSAndreas Dilger ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a) 2597b03a2f7eSAndreas Dilger 2598e7c96e8eSJoe Perches #ifdef CONFIG_PRINTK 2599e7c96e8eSJoe Perches 2600e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 2601e7c96e8eSJoe Perches __ext4_error_inode(inode, func, line, block, fmt, ##__VA_ARGS__) 2602e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 2603e7c96e8eSJoe Perches __ext4_error_file(file, func, line, block, fmt, ##__VA_ARGS__) 2604e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 2605e7c96e8eSJoe Perches __ext4_error(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2606e7c96e8eSJoe Perches #define ext4_abort(sb, fmt, ...) \ 2607e7c96e8eSJoe Perches __ext4_abort(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2608e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 2609e7c96e8eSJoe Perches __ext4_warning(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2610b03a2f7eSAndreas Dilger #define ext4_warning_inode(inode, fmt, ...) \ 2611b03a2f7eSAndreas Dilger __ext4_warning_inode(inode, __func__, __LINE__, fmt, ##__VA_ARGS__) 2612e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 2613e7c96e8eSJoe Perches __ext4_msg(sb, level, fmt, ##__VA_ARGS__) 2614e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 2615e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, __func__, __LINE__, msg) 2616e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 2617e7c96e8eSJoe Perches __ext4_grp_locked_error(__func__, __LINE__, sb, grp, ino, block, \ 2618e7c96e8eSJoe Perches fmt, ##__VA_ARGS__) 2619e7c96e8eSJoe Perches 2620e7c96e8eSJoe Perches #else 2621e7c96e8eSJoe Perches 2622e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 2623e7c96e8eSJoe Perches do { \ 2624e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2625e7c96e8eSJoe Perches __ext4_error_inode(inode, "", 0, block, " "); \ 2626e7c96e8eSJoe Perches } while (0) 2627e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 2628e7c96e8eSJoe Perches do { \ 2629e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2630e7c96e8eSJoe Perches __ext4_error_file(file, "", 0, block, " "); \ 2631e7c96e8eSJoe Perches } while (0) 2632e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 2633e7c96e8eSJoe Perches do { \ 2634e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2635e7c96e8eSJoe Perches __ext4_error(sb, "", 0, " "); \ 2636e7c96e8eSJoe Perches } while (0) 2637e7c96e8eSJoe Perches #define ext4_abort(sb, fmt, ...) \ 2638e7c96e8eSJoe Perches do { \ 2639e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2640e7c96e8eSJoe Perches __ext4_abort(sb, "", 0, " "); \ 2641e7c96e8eSJoe Perches } while (0) 2642e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 2643e7c96e8eSJoe Perches do { \ 2644e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2645e7c96e8eSJoe Perches __ext4_warning(sb, "", 0, " "); \ 2646e7c96e8eSJoe Perches } while (0) 2647b03a2f7eSAndreas Dilger #define ext4_warning_inode(inode, fmt, ...) \ 2648b03a2f7eSAndreas Dilger do { \ 2649b03a2f7eSAndreas Dilger no_printk(fmt, ##__VA_ARGS__); \ 2650b03a2f7eSAndreas Dilger __ext4_warning_inode(inode, "", 0, " "); \ 2651b03a2f7eSAndreas Dilger } while (0) 2652e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 2653e7c96e8eSJoe Perches do { \ 2654e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2655e7c96e8eSJoe Perches __ext4_msg(sb, "", " "); \ 2656e7c96e8eSJoe Perches } while (0) 2657e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 2658e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, "", 0, "") 2659e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 2660e7c96e8eSJoe Perches do { \ 2661e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2662e7c96e8eSJoe Perches __ext4_grp_locked_error("", 0, sb, grp, ino, block, " "); \ 2663e7c96e8eSJoe Perches } while (0) 2664e7c96e8eSJoe Perches 2665e7c96e8eSJoe Perches #endif 2666e7c96e8eSJoe Perches 26673dcf5451SChristoph Hellwig extern void ext4_update_dynamic_rev(struct super_block *sb); 26683dcf5451SChristoph Hellwig extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb, 26693dcf5451SChristoph Hellwig __u32 compat); 26703dcf5451SChristoph Hellwig extern int ext4_update_rocompat_feature(handle_t *handle, 26713dcf5451SChristoph Hellwig struct super_block *sb, __u32 rocompat); 26723dcf5451SChristoph Hellwig extern int ext4_update_incompat_feature(handle_t *handle, 26733dcf5451SChristoph Hellwig struct super_block *sb, __u32 incompat); 26743dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 26753dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 26763dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 26773dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 26783dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_table(struct super_block *sb, 26793dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 2680021b65bbSTheodore Ts'o extern __u32 ext4_free_group_clusters(struct super_block *sb, 2681560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2682560671a0SAneesh Kumar K.V extern __u32 ext4_free_inodes_count(struct super_block *sb, 2683560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2684560671a0SAneesh Kumar K.V extern __u32 ext4_used_dirs_count(struct super_block *sb, 2685560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2686560671a0SAneesh Kumar K.V extern __u32 ext4_itable_unused_count(struct super_block *sb, 2687560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 26883dcf5451SChristoph Hellwig extern void ext4_block_bitmap_set(struct super_block *sb, 26893dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 26903dcf5451SChristoph Hellwig extern void ext4_inode_bitmap_set(struct super_block *sb, 26913dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 26923dcf5451SChristoph Hellwig extern void ext4_inode_table_set(struct super_block *sb, 26933dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 2694021b65bbSTheodore Ts'o extern void ext4_free_group_clusters_set(struct super_block *sb, 2695021b65bbSTheodore Ts'o struct ext4_group_desc *bg, 2696021b65bbSTheodore Ts'o __u32 count); 2697560671a0SAneesh Kumar K.V extern void ext4_free_inodes_set(struct super_block *sb, 2698560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2699560671a0SAneesh Kumar K.V extern void ext4_used_dirs_set(struct super_block *sb, 2700560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2701560671a0SAneesh Kumar K.V extern void ext4_itable_unused_set(struct super_block *sb, 2702560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2703feb0ab32SDarrick J. Wong extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group, 2704bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 2705feb0ab32SDarrick J. Wong extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group, 2706bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 27077f511862STheodore Ts'o extern int ext4_register_li_request(struct super_block *sb, 27087f511862STheodore Ts'o ext4_group_t first_not_zeroed); 27093dcf5451SChristoph Hellwig 271041a246d1SDarrick J. Wong static inline int ext4_has_group_desc_csum(struct super_block *sb) 271141a246d1SDarrick J. Wong { 2712e2b911c5SDarrick J. Wong return ext4_has_feature_gdt_csum(sb) || 2713e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_chksum_driver != NULL; 271441a246d1SDarrick J. Wong } 271541a246d1SDarrick J. Wong 27169aa5d32bSDmitry Monakhov static inline int ext4_has_metadata_csum(struct super_block *sb) 27179aa5d32bSDmitry Monakhov { 2718e2b911c5SDarrick J. Wong WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) && 27199aa5d32bSDmitry Monakhov !EXT4_SB(sb)->s_chksum_driver); 27209aa5d32bSDmitry Monakhov 27219aa5d32bSDmitry Monakhov return (EXT4_SB(sb)->s_chksum_driver != NULL); 27229aa5d32bSDmitry Monakhov } 27233dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) 27243dcf5451SChristoph Hellwig { 27253dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) | 27263dcf5451SChristoph Hellwig le32_to_cpu(es->s_blocks_count_lo); 27273dcf5451SChristoph Hellwig } 27283dcf5451SChristoph Hellwig 27293dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) 27303dcf5451SChristoph Hellwig { 27313dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) | 27323dcf5451SChristoph Hellwig le32_to_cpu(es->s_r_blocks_count_lo); 27333dcf5451SChristoph Hellwig } 27343dcf5451SChristoph Hellwig 27353dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) 27363dcf5451SChristoph Hellwig { 27373dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) | 27383dcf5451SChristoph Hellwig le32_to_cpu(es->s_free_blocks_count_lo); 27393dcf5451SChristoph Hellwig } 27403dcf5451SChristoph Hellwig 27413dcf5451SChristoph Hellwig static inline void ext4_blocks_count_set(struct ext4_super_block *es, 27423dcf5451SChristoph Hellwig ext4_fsblk_t blk) 27433dcf5451SChristoph Hellwig { 27443dcf5451SChristoph Hellwig es->s_blocks_count_lo = cpu_to_le32((u32)blk); 27453dcf5451SChristoph Hellwig es->s_blocks_count_hi = cpu_to_le32(blk >> 32); 27463dcf5451SChristoph Hellwig } 27473dcf5451SChristoph Hellwig 27483dcf5451SChristoph Hellwig static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, 27493dcf5451SChristoph Hellwig ext4_fsblk_t blk) 27503dcf5451SChristoph Hellwig { 27513dcf5451SChristoph Hellwig es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); 27523dcf5451SChristoph Hellwig es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); 27533dcf5451SChristoph Hellwig } 27543dcf5451SChristoph Hellwig 27553dcf5451SChristoph Hellwig static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, 27563dcf5451SChristoph Hellwig ext4_fsblk_t blk) 27573dcf5451SChristoph Hellwig { 27583dcf5451SChristoph Hellwig es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); 27593dcf5451SChristoph Hellwig es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); 27603dcf5451SChristoph Hellwig } 27613dcf5451SChristoph Hellwig 27623dcf5451SChristoph Hellwig static inline loff_t ext4_isize(struct ext4_inode *raw_inode) 27633dcf5451SChristoph Hellwig { 276406a279d6STheodore Ts'o if (S_ISREG(le16_to_cpu(raw_inode->i_mode))) 27653dcf5451SChristoph Hellwig return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | 27663dcf5451SChristoph Hellwig le32_to_cpu(raw_inode->i_size_lo); 276706a279d6STheodore Ts'o else 276806a279d6STheodore Ts'o return (loff_t) le32_to_cpu(raw_inode->i_size_lo); 27693dcf5451SChristoph Hellwig } 27703dcf5451SChristoph Hellwig 27713dcf5451SChristoph Hellwig static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) 27723dcf5451SChristoph Hellwig { 27733dcf5451SChristoph Hellwig raw_inode->i_size_lo = cpu_to_le32(i_size); 27743dcf5451SChristoph Hellwig raw_inode->i_size_high = cpu_to_le32(i_size >> 32); 27753dcf5451SChristoph Hellwig } 27763dcf5451SChristoph Hellwig 27773dcf5451SChristoph Hellwig static inline 27783dcf5451SChristoph Hellwig struct ext4_group_info *ext4_get_group_info(struct super_block *sb, 27793dcf5451SChristoph Hellwig ext4_group_t group) 27803dcf5451SChristoph Hellwig { 27813dcf5451SChristoph Hellwig struct ext4_group_info ***grp_info; 27823dcf5451SChristoph Hellwig long indexv, indexh; 27832f2e09ebSTheodore Ts'o BUG_ON(group >= EXT4_SB(sb)->s_groups_count); 27843dcf5451SChristoph Hellwig grp_info = EXT4_SB(sb)->s_group_info; 27853dcf5451SChristoph Hellwig indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); 27863dcf5451SChristoph Hellwig indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); 27873dcf5451SChristoph Hellwig return grp_info[indexv][indexh]; 27883dcf5451SChristoph Hellwig } 27893dcf5451SChristoph Hellwig 27908df9675fSTheodore Ts'o /* 27918df9675fSTheodore Ts'o * Reading s_groups_count requires using smp_rmb() afterwards. See 27928df9675fSTheodore Ts'o * the locking protocol documented in the comments of ext4_group_add() 27938df9675fSTheodore Ts'o * in resize.c 27948df9675fSTheodore Ts'o */ 27958df9675fSTheodore Ts'o static inline ext4_group_t ext4_get_groups_count(struct super_block *sb) 27968df9675fSTheodore Ts'o { 27978df9675fSTheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 27988df9675fSTheodore Ts'o 27998df9675fSTheodore Ts'o smp_rmb(); 28008df9675fSTheodore Ts'o return ngroups; 28018df9675fSTheodore Ts'o } 28023dcf5451SChristoph Hellwig 2803772cb7c8SJose R. Santos static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, 2804772cb7c8SJose R. Santos ext4_group_t block_group) 2805772cb7c8SJose R. Santos { 2806772cb7c8SJose R. Santos return block_group >> sbi->s_log_groups_per_flex; 2807772cb7c8SJose R. Santos } 2808772cb7c8SJose R. Santos 2809772cb7c8SJose R. Santos static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi) 2810772cb7c8SJose R. Santos { 2811772cb7c8SJose R. Santos return 1 << sbi->s_log_groups_per_flex; 2812772cb7c8SJose R. Santos } 2813772cb7c8SJose R. Santos 28143dcf5451SChristoph Hellwig #define ext4_std_error(sb, errno) \ 28153dcf5451SChristoph Hellwig do { \ 28163dcf5451SChristoph Hellwig if ((errno)) \ 2817c398eda0STheodore Ts'o __ext4_std_error((sb), __func__, __LINE__, (errno)); \ 28183dcf5451SChristoph Hellwig } while (0) 28193dcf5451SChristoph Hellwig 2820a30d542aSAneesh Kumar K.V #ifdef CONFIG_SMP 2821df55c99dSTheodore Ts'o /* Each CPU can accumulate percpu_counter_batch clusters in their local 2822df55c99dSTheodore Ts'o * counters. So we need to make sure we have free clusters more 2823179f7ebfSEric Dumazet * than percpu_counter_batch * nr_cpu_ids. Also add a window of 4 times. 2824a30d542aSAneesh Kumar K.V */ 2825df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids)) 2826a30d542aSAneesh Kumar K.V #else 2827df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK 0 2828a30d542aSAneesh Kumar K.V #endif 2829a30d542aSAneesh Kumar K.V 283090e775b7SJan Kara /* Update i_disksize. Requires i_mutex to avoid races with truncate */ 2831cf17fea6SAneesh Kumar K.V static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize) 2832cf17fea6SAneesh Kumar K.V { 283390e775b7SJan Kara WARN_ON_ONCE(S_ISREG(inode->i_mode) && 28345955102cSAl Viro !inode_is_locked(inode)); 2835cf17fea6SAneesh Kumar K.V down_write(&EXT4_I(inode)->i_data_sem); 2836cf17fea6SAneesh Kumar K.V if (newsize > EXT4_I(inode)->i_disksize) 2837cf17fea6SAneesh Kumar K.V EXT4_I(inode)->i_disksize = newsize; 2838cf17fea6SAneesh Kumar K.V up_write(&EXT4_I(inode)->i_data_sem); 283990e775b7SJan Kara } 284090e775b7SJan Kara 28414631dbf6SDmitry Monakhov /* Update i_size, i_disksize. Requires i_mutex to avoid races with truncate */ 28424631dbf6SDmitry Monakhov static inline int ext4_update_inode_size(struct inode *inode, loff_t newsize) 28434631dbf6SDmitry Monakhov { 28444631dbf6SDmitry Monakhov int changed = 0; 28454631dbf6SDmitry Monakhov 28464631dbf6SDmitry Monakhov if (newsize > inode->i_size) { 28474631dbf6SDmitry Monakhov i_size_write(inode, newsize); 28484631dbf6SDmitry Monakhov changed = 1; 28494631dbf6SDmitry Monakhov } 28504631dbf6SDmitry Monakhov if (newsize > EXT4_I(inode)->i_disksize) { 28514631dbf6SDmitry Monakhov ext4_update_i_disksize(inode, newsize); 28524631dbf6SDmitry Monakhov changed |= 2; 28534631dbf6SDmitry Monakhov } 28544631dbf6SDmitry Monakhov return changed; 28554631dbf6SDmitry Monakhov } 28564631dbf6SDmitry Monakhov 285701127848SJan Kara int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset, 285801127848SJan Kara loff_t len); 285901127848SJan Kara 28605d1b1b3fSAneesh Kumar K.V struct ext4_group_info { 28615d1b1b3fSAneesh Kumar K.V unsigned long bb_state; 28625d1b1b3fSAneesh Kumar K.V struct rb_root bb_free_root; 2863a36b4498SEric Sandeen ext4_grpblk_t bb_first_free; /* first free block */ 2864a36b4498SEric Sandeen ext4_grpblk_t bb_free; /* total free blocks */ 2865a36b4498SEric Sandeen ext4_grpblk_t bb_fragments; /* nr of freespace fragments */ 28668a57d9d6SCurt Wohlgemuth ext4_grpblk_t bb_largest_free_order;/* order of largest frag in BG */ 28675d1b1b3fSAneesh Kumar K.V struct list_head bb_prealloc_list; 28685d1b1b3fSAneesh Kumar K.V #ifdef DOUBLE_CHECK 28695d1b1b3fSAneesh Kumar K.V void *bb_bitmap; 28705d1b1b3fSAneesh Kumar K.V #endif 28715d1b1b3fSAneesh Kumar K.V struct rw_semaphore alloc_sem; 2872a36b4498SEric Sandeen ext4_grpblk_t bb_counters[]; /* Nr of free power-of-two-block 2873a36b4498SEric Sandeen * regions, index is order. 2874a36b4498SEric Sandeen * bb_counters[3] = 5 means 2875a36b4498SEric Sandeen * 5 free 8-block regions. */ 28765d1b1b3fSAneesh Kumar K.V }; 28775d1b1b3fSAneesh Kumar K.V 28785d1b1b3fSAneesh Kumar K.V #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 28793d56b8d2STao Ma #define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1 2880163a203dSDarrick J. Wong #define EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT 2 288187a39389SDarrick J. Wong #define EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT 3 28825d1b1b3fSAneesh Kumar K.V 28835d1b1b3fSAneesh Kumar K.V #define EXT4_MB_GRP_NEED_INIT(grp) \ 28845d1b1b3fSAneesh Kumar K.V (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) 2885163a203dSDarrick J. Wong #define EXT4_MB_GRP_BBITMAP_CORRUPT(grp) \ 2886163a203dSDarrick J. Wong (test_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 288787a39389SDarrick J. Wong #define EXT4_MB_GRP_IBITMAP_CORRUPT(grp) \ 288887a39389SDarrick J. Wong (test_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 28895d1b1b3fSAneesh Kumar K.V 28903d56b8d2STao Ma #define EXT4_MB_GRP_WAS_TRIMMED(grp) \ 28913d56b8d2STao Ma (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 28923d56b8d2STao Ma #define EXT4_MB_GRP_SET_TRIMMED(grp) \ 28933d56b8d2STao Ma (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 28943d56b8d2STao Ma #define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \ 28953d56b8d2STao Ma (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 28963d56b8d2STao Ma 289750797481STheodore Ts'o #define EXT4_MAX_CONTENTION 8 289850797481STheodore Ts'o #define EXT4_CONTENTION_THRESHOLD 2 289950797481STheodore Ts'o 2900955ce5f5SAneesh Kumar K.V static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb, 2901955ce5f5SAneesh Kumar K.V ext4_group_t group) 2902955ce5f5SAneesh Kumar K.V { 2903955ce5f5SAneesh Kumar K.V return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group); 2904955ce5f5SAneesh Kumar K.V } 2905955ce5f5SAneesh Kumar K.V 290650797481STheodore Ts'o /* 290750797481STheodore Ts'o * Returns true if the filesystem is busy enough that attempts to 290850797481STheodore Ts'o * access the block group locks has run into contention. 290950797481STheodore Ts'o */ 291050797481STheodore Ts'o static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi) 291150797481STheodore Ts'o { 291250797481STheodore Ts'o return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD); 291350797481STheodore Ts'o } 291450797481STheodore Ts'o 29155d1b1b3fSAneesh Kumar K.V static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group) 29165d1b1b3fSAneesh Kumar K.V { 291750797481STheodore Ts'o spinlock_t *lock = ext4_group_lock_ptr(sb, group); 291850797481STheodore Ts'o if (spin_trylock(lock)) 291950797481STheodore Ts'o /* 292050797481STheodore Ts'o * We're able to grab the lock right away, so drop the 292150797481STheodore Ts'o * lock contention counter. 292250797481STheodore Ts'o */ 292350797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0); 292450797481STheodore Ts'o else { 292550797481STheodore Ts'o /* 292650797481STheodore Ts'o * The lock is busy, so bump the contention counter, 292750797481STheodore Ts'o * and then wait on the spin lock. 292850797481STheodore Ts'o */ 292950797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1, 293050797481STheodore Ts'o EXT4_MAX_CONTENTION); 293150797481STheodore Ts'o spin_lock(lock); 293250797481STheodore Ts'o } 29335d1b1b3fSAneesh Kumar K.V } 29345d1b1b3fSAneesh Kumar K.V 29355d1b1b3fSAneesh Kumar K.V static inline void ext4_unlock_group(struct super_block *sb, 29365d1b1b3fSAneesh Kumar K.V ext4_group_t group) 29375d1b1b3fSAneesh Kumar K.V { 2938955ce5f5SAneesh Kumar K.V spin_unlock(ext4_group_lock_ptr(sb, group)); 29395d1b1b3fSAneesh Kumar K.V } 29405d1b1b3fSAneesh Kumar K.V 29413dcf5451SChristoph Hellwig /* 29421f7d1e77STheodore Ts'o * Block validity checking 29431f7d1e77STheodore Ts'o */ 29441f7d1e77STheodore Ts'o #define ext4_check_indirect_blockref(inode, bh) \ 29451f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 29461f7d1e77STheodore Ts'o (__le32 *)(bh)->b_data, \ 29471f7d1e77STheodore Ts'o EXT4_ADDR_PER_BLOCK((inode)->i_sb)) 29481f7d1e77STheodore Ts'o 29491f7d1e77STheodore Ts'o #define ext4_ind_check_inode(inode) \ 29501f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 29511f7d1e77STheodore Ts'o EXT4_I(inode)->i_data, \ 29521f7d1e77STheodore Ts'o EXT4_NDIR_BLOCKS) 29531f7d1e77STheodore Ts'o 29541f7d1e77STheodore Ts'o /* 29553dcf5451SChristoph Hellwig * Inodes and files operations 29563dcf5451SChristoph Hellwig */ 29573dcf5451SChristoph Hellwig 29583dcf5451SChristoph Hellwig /* dir.c */ 29593dcf5451SChristoph Hellwig extern const struct file_operations ext4_dir_operations; 29603dcf5451SChristoph Hellwig 29613dcf5451SChristoph Hellwig /* file.c */ 29623dcf5451SChristoph Hellwig extern const struct inode_operations ext4_file_inode_operations; 29633dcf5451SChristoph Hellwig extern const struct file_operations ext4_file_operations; 2964e0d10bfaSToshiyuki Okajima extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin); 29653dcf5451SChristoph Hellwig 296695eaefbdSTheodore Ts'o /* inline.c */ 296795eaefbdSTheodore Ts'o extern int ext4_get_max_inline_size(struct inode *inode); 296895eaefbdSTheodore Ts'o extern int ext4_find_inline_data_nolock(struct inode *inode); 296995eaefbdSTheodore Ts'o extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, 297095eaefbdSTheodore Ts'o unsigned int len); 297195eaefbdSTheodore Ts'o extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); 297295eaefbdSTheodore Ts'o 297395eaefbdSTheodore Ts'o extern int ext4_readpage_inline(struct inode *inode, struct page *page); 297495eaefbdSTheodore Ts'o extern int ext4_try_to_write_inline_data(struct address_space *mapping, 297595eaefbdSTheodore Ts'o struct inode *inode, 297695eaefbdSTheodore Ts'o loff_t pos, unsigned len, 297795eaefbdSTheodore Ts'o unsigned flags, 297895eaefbdSTheodore Ts'o struct page **pagep); 297995eaefbdSTheodore Ts'o extern int ext4_write_inline_data_end(struct inode *inode, 298095eaefbdSTheodore Ts'o loff_t pos, unsigned len, 298195eaefbdSTheodore Ts'o unsigned copied, 298295eaefbdSTheodore Ts'o struct page *page); 298395eaefbdSTheodore Ts'o extern struct buffer_head * 298495eaefbdSTheodore Ts'o ext4_journalled_write_inline_data(struct inode *inode, 298595eaefbdSTheodore Ts'o unsigned len, 298695eaefbdSTheodore Ts'o struct page *page); 298795eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_begin(struct address_space *mapping, 298895eaefbdSTheodore Ts'o struct inode *inode, 298995eaefbdSTheodore Ts'o loff_t pos, unsigned len, 299095eaefbdSTheodore Ts'o unsigned flags, 299195eaefbdSTheodore Ts'o struct page **pagep, 299295eaefbdSTheodore Ts'o void **fsdata); 299395eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, 299495eaefbdSTheodore Ts'o unsigned len, unsigned copied, 299595eaefbdSTheodore Ts'o struct page *page); 29965b643f9cSTheodore Ts'o extern int ext4_try_add_inline_entry(handle_t *handle, 29975b643f9cSTheodore Ts'o struct ext4_filename *fname, 299856a04915STheodore Ts'o struct inode *dir, struct inode *inode); 299995eaefbdSTheodore Ts'o extern int ext4_try_create_inline_dir(handle_t *handle, 300095eaefbdSTheodore Ts'o struct inode *parent, 300195eaefbdSTheodore Ts'o struct inode *inode); 300295eaefbdSTheodore Ts'o extern int ext4_read_inline_dir(struct file *filp, 3003725bebb2SAl Viro struct dir_context *ctx, 300495eaefbdSTheodore Ts'o int *has_inline_data); 30058af0f082STao Ma extern int htree_inlinedir_to_tree(struct file *dir_file, 30068af0f082STao Ma struct inode *dir, ext4_lblk_t block, 30078af0f082STao Ma struct dx_hash_info *hinfo, 30088af0f082STao Ma __u32 start_hash, __u32 start_minor_hash, 30098af0f082STao Ma int *has_inline_data); 301095eaefbdSTheodore Ts'o extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, 30115b643f9cSTheodore Ts'o struct ext4_filename *fname, 301295eaefbdSTheodore Ts'o const struct qstr *d_name, 301395eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **res_dir, 301495eaefbdSTheodore Ts'o int *has_inline_data); 301595eaefbdSTheodore Ts'o extern int ext4_delete_inline_entry(handle_t *handle, 301695eaefbdSTheodore Ts'o struct inode *dir, 301795eaefbdSTheodore Ts'o struct ext4_dir_entry_2 *de_del, 301895eaefbdSTheodore Ts'o struct buffer_head *bh, 301995eaefbdSTheodore Ts'o int *has_inline_data); 3020a7550b30SJaegeuk Kim extern bool empty_inline_dir(struct inode *dir, int *has_inline_data); 302195eaefbdSTheodore Ts'o extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, 302295eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **parent_de, 302395eaefbdSTheodore Ts'o int *retval); 302495eaefbdSTheodore Ts'o extern int ext4_inline_data_fiemap(struct inode *inode, 302595eaefbdSTheodore Ts'o struct fiemap_extent_info *fieinfo, 3026d952d69eSDmitry Monakhov int *has_inline, __u64 start, __u64 len); 302795eaefbdSTheodore Ts'o extern int ext4_try_to_evict_inline_data(handle_t *handle, 302895eaefbdSTheodore Ts'o struct inode *inode, 302995eaefbdSTheodore Ts'o int needed); 303001daf945STheodore Ts'o extern int ext4_inline_data_truncate(struct inode *inode, int *has_inline); 303195eaefbdSTheodore Ts'o 303295eaefbdSTheodore Ts'o extern int ext4_convert_inline_data(struct inode *inode); 303395eaefbdSTheodore Ts'o 303483447ccbSZheng Liu static inline int ext4_has_inline_data(struct inode *inode) 303583447ccbSZheng Liu { 303683447ccbSZheng Liu return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) && 303783447ccbSZheng Liu EXT4_I(inode)->i_inline_off; 303883447ccbSZheng Liu } 303983447ccbSZheng Liu 30403dcf5451SChristoph Hellwig /* namei.c */ 30413dcf5451SChristoph Hellwig extern const struct inode_operations ext4_dir_inode_operations; 30423dcf5451SChristoph Hellwig extern const struct inode_operations ext4_special_inode_operations; 3043596397b7STheodore Ts'o extern struct dentry *ext4_get_parent(struct dentry *child); 3044a774f9c2STao Ma extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode, 3045a774f9c2STao Ma struct ext4_dir_entry_2 *de, 3046a774f9c2STao Ma int blocksize, int csum_size, 3047a774f9c2STao Ma unsigned int parent_ino, int dotdot_real_len); 30483c47d541STao Ma extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t, 30493c47d541STao Ma unsigned int blocksize); 30503c47d541STao Ma extern int ext4_handle_dirty_dirent_node(handle_t *handle, 30513c47d541STao Ma struct inode *inode, 30523c47d541STao Ma struct buffer_head *bh); 30538af0f082STao Ma #define S_SHIFT 12 30548af0f082STao Ma static unsigned char ext4_type_by_mode[S_IFMT >> S_SHIFT] = { 30558af0f082STao Ma [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE, 30568af0f082STao Ma [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR, 30578af0f082STao Ma [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV, 30588af0f082STao Ma [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV, 30598af0f082STao Ma [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO, 30608af0f082STao Ma [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK, 30618af0f082STao Ma [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK, 30628af0f082STao Ma }; 30638af0f082STao Ma 30648af0f082STao Ma static inline void ext4_set_de_type(struct super_block *sb, 30658af0f082STao Ma struct ext4_dir_entry_2 *de, 30668af0f082STao Ma umode_t mode) { 3067e2b911c5SDarrick J. Wong if (ext4_has_feature_filetype(sb)) 30688af0f082STao Ma de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; 30698af0f082STao Ma } 30708af0f082STao Ma 3071f64e02feSTheodore Ts'o /* readpages.c */ 3072f64e02feSTheodore Ts'o extern int ext4_mpage_readpages(struct address_space *mapping, 3073f64e02feSTheodore Ts'o struct list_head *pages, struct page *page, 3074f64e02feSTheodore Ts'o unsigned nr_pages); 30753dcf5451SChristoph Hellwig 30763dcf5451SChristoph Hellwig /* symlink.c */ 3077a7a67e8aSAl Viro extern const struct inode_operations ext4_encrypted_symlink_inode_operations; 30783dcf5451SChristoph Hellwig extern const struct inode_operations ext4_symlink_inode_operations; 30793dcf5451SChristoph Hellwig extern const struct inode_operations ext4_fast_symlink_inode_operations; 30803dcf5451SChristoph Hellwig 3081b5799018STheodore Ts'o /* sysfs.c */ 3082b5799018STheodore Ts'o extern int ext4_register_sysfs(struct super_block *sb); 3083ebd173beSTheodore Ts'o extern void ext4_unregister_sysfs(struct super_block *sb); 3084b5799018STheodore Ts'o extern int __init ext4_init_sysfs(void); 3085b5799018STheodore Ts'o extern void ext4_exit_sysfs(void); 3086b5799018STheodore Ts'o 30876fd058f7STheodore Ts'o /* block_validity */ 30886fd058f7STheodore Ts'o extern void ext4_release_system_zone(struct super_block *sb); 30896fd058f7STheodore Ts'o extern int ext4_setup_system_zone(struct super_block *sb); 30905dabfc78STheodore Ts'o extern int __init ext4_init_system_zone(void); 30915dabfc78STheodore Ts'o extern void ext4_exit_system_zone(void); 30926fd058f7STheodore Ts'o extern int ext4_data_block_valid(struct ext4_sb_info *sbi, 30936fd058f7STheodore Ts'o ext4_fsblk_t start_blk, 30946fd058f7STheodore Ts'o unsigned int count); 30951f7d1e77STheodore Ts'o extern int ext4_check_blockref(const char *, unsigned int, 30961f7d1e77STheodore Ts'o struct inode *, __le32 *, unsigned int); 30976fd058f7STheodore Ts'o 30983dcf5451SChristoph Hellwig /* extents.c */ 30994a092d73STheodore Ts'o struct ext4_ext_path; 31004a092d73STheodore Ts'o struct ext4_extent; 31014a092d73STheodore Ts'o 3102d7b2a00cSZheng Liu /* 3103d7b2a00cSZheng Liu * Maximum number of logical blocks in a file; ext4_extent's ee_block is 3104d7b2a00cSZheng Liu * __le32. 3105d7b2a00cSZheng Liu */ 3106d7b2a00cSZheng Liu #define EXT_MAX_BLOCKS 0xffffffff 3107d7b2a00cSZheng Liu 31083dcf5451SChristoph Hellwig extern int ext4_ext_tree_init(handle_t *handle, struct inode *); 31093dcf5451SChristoph Hellwig extern int ext4_ext_writepage_trans_blocks(struct inode *, int); 3110fffb2739SJan Kara extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents); 3111e35fd660STheodore Ts'o extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, 3112e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 3113d0abb36dSTheodore Ts'o extern int ext4_ext_truncate(handle_t *, struct inode *); 311426a4c0c6STheodore Ts'o extern int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start, 311526a4c0c6STheodore Ts'o ext4_lblk_t end); 31163dcf5451SChristoph Hellwig extern void ext4_ext_init(struct super_block *); 31173dcf5451SChristoph Hellwig extern void ext4_ext_release(struct super_block *); 31182fe17c10SChristoph Hellwig extern long ext4_fallocate(struct file *file, int mode, loff_t offset, 31193dcf5451SChristoph Hellwig loff_t len); 31206b523df4SJan Kara extern int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode, 31216b523df4SJan Kara loff_t offset, ssize_t len); 3122e35fd660STheodore Ts'o extern int ext4_map_blocks(handle_t *handle, struct inode *inode, 3123e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 31244a092d73STheodore Ts'o extern int ext4_ext_calc_metadata_amount(struct inode *inode, 31254a092d73STheodore Ts'o ext4_lblk_t lblocks); 31264a092d73STheodore Ts'o extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode, 31274a092d73STheodore Ts'o int num, 31284a092d73STheodore Ts'o struct ext4_ext_path *path); 31294a092d73STheodore Ts'o extern int ext4_can_extents_be_merged(struct inode *inode, 31304a092d73STheodore Ts'o struct ext4_extent *ex1, 31314a092d73STheodore Ts'o struct ext4_extent *ex2); 31324a092d73STheodore Ts'o extern int ext4_ext_insert_extent(handle_t *, struct inode *, 3133dfe50809STheodore Ts'o struct ext4_ext_path **, 31344a092d73STheodore Ts'o struct ext4_extent *, int); 3135ed8a1a76STheodore Ts'o extern struct ext4_ext_path *ext4_find_extent(struct inode *, ext4_lblk_t, 3136705912caSTheodore Ts'o struct ext4_ext_path **, 3137107a7bd3STheodore Ts'o int flags); 31384a092d73STheodore Ts'o extern void ext4_ext_drop_refs(struct ext4_ext_path *); 31394a092d73STheodore Ts'o extern int ext4_ext_check_inode(struct inode *inode); 3140f7fec032SZheng Liu extern int ext4_find_delalloc_range(struct inode *inode, 3141f7fec032SZheng Liu ext4_lblk_t lblk_start, 3142f7fec032SZheng Liu ext4_lblk_t lblk_end); 31434a092d73STheodore Ts'o extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk); 3144fcf6b1b7SDmitry Monakhov extern ext4_lblk_t ext4_ext_next_allocated_block(struct ext4_ext_path *path); 31453a06d778SAneesh Kumar K.V extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 31463a06d778SAneesh Kumar K.V __u64 start, __u64 len); 31477869a4a6STheodore Ts'o extern int ext4_ext_precache(struct inode *inode); 31489eb79482SNamjae Jeon extern int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len); 3149331573feSNamjae Jeon extern int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len); 3150fcf6b1b7SDmitry Monakhov extern int ext4_swap_extents(handle_t *handle, struct inode *inode1, 3151fcf6b1b7SDmitry Monakhov struct inode *inode2, ext4_lblk_t lblk1, 3152fcf6b1b7SDmitry Monakhov ext4_lblk_t lblk2, ext4_lblk_t count, 3153fcf6b1b7SDmitry Monakhov int mark_unwritten,int *err); 31544a092d73STheodore Ts'o 3155748de673SAkira Fujita /* move_extent.c */ 3156393d1d1dSDr. Tilmann Bubeck extern void ext4_double_down_write_data_sem(struct inode *first, 3157393d1d1dSDr. Tilmann Bubeck struct inode *second); 3158393d1d1dSDr. Tilmann Bubeck extern void ext4_double_up_write_data_sem(struct inode *orig_inode, 3159393d1d1dSDr. Tilmann Bubeck struct inode *donor_inode); 3160748de673SAkira Fujita extern int ext4_move_extents(struct file *o_filp, struct file *d_filp, 3161748de673SAkira Fujita __u64 start_orig, __u64 start_donor, 3162748de673SAkira Fujita __u64 len, __u64 *moved_len); 3163748de673SAkira Fujita 3164bd2d0210STheodore Ts'o /* page-io.c */ 31655dabfc78STheodore Ts'o extern int __init ext4_init_pageio(void); 31665dabfc78STheodore Ts'o extern void ext4_exit_pageio(void); 3167bd2d0210STheodore Ts'o extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags); 316897a851edSJan Kara extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end); 316997a851edSJan Kara extern int ext4_put_io_end(ext4_io_end_t *io_end); 317097a851edSJan Kara extern void ext4_put_io_end_defer(ext4_io_end_t *io_end); 317197a851edSJan Kara extern void ext4_io_submit_init(struct ext4_io_submit *io, 317297a851edSJan Kara struct writeback_control *wbc); 31732e8fa54eSJan Kara extern void ext4_end_io_rsv_work(struct work_struct *work); 3174bd2d0210STheodore Ts'o extern void ext4_io_submit(struct ext4_io_submit *io); 3175bd2d0210STheodore Ts'o extern int ext4_bio_write_page(struct ext4_io_submit *io, 3176bd2d0210STheodore Ts'o struct page *page, 3177bd2d0210STheodore Ts'o int len, 31781c8349a1SNamjae Jeon struct writeback_control *wbc, 31791c8349a1SNamjae Jeon bool keep_towrite); 31803a06d778SAneesh Kumar K.V 3181c5e06d10SJohann Lombardi /* mmp.c */ 3182c5e06d10SJohann Lombardi extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t); 3183c5e06d10SJohann Lombardi 31843613d228SJan Kara /* 318548fc7f7eSAdam Buchbinder * Add new method to test whether block and inode bitmaps are properly 31862ccb5fb9SAneesh Kumar K.V * initialized. With uninit_bg reading the block from disk is not enough 31872ccb5fb9SAneesh Kumar K.V * to mark the bitmap uptodate. We need to also zero-out the bitmap 31882ccb5fb9SAneesh Kumar K.V */ 31892ccb5fb9SAneesh Kumar K.V #define BH_BITMAP_UPTODATE BH_JBDPrivateStart 31902ccb5fb9SAneesh Kumar K.V 31912ccb5fb9SAneesh Kumar K.V static inline int bitmap_uptodate(struct buffer_head *bh) 31922ccb5fb9SAneesh Kumar K.V { 31932ccb5fb9SAneesh Kumar K.V return (buffer_uptodate(bh) && 31942ccb5fb9SAneesh Kumar K.V test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state)); 31952ccb5fb9SAneesh Kumar K.V } 31962ccb5fb9SAneesh Kumar K.V static inline void set_bitmap_uptodate(struct buffer_head *bh) 31972ccb5fb9SAneesh Kumar K.V { 31982ccb5fb9SAneesh Kumar K.V set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state); 31992ccb5fb9SAneesh Kumar K.V } 32002ccb5fb9SAneesh Kumar K.V 320117335dccSDmitry Monakhov /* 320217335dccSDmitry Monakhov * Disable DIO read nolock optimization, so new dioreaders will be forced 320317335dccSDmitry Monakhov * to grab i_mutex 320417335dccSDmitry Monakhov */ 320517335dccSDmitry Monakhov static inline void ext4_inode_block_unlocked_dio(struct inode *inode) 320617335dccSDmitry Monakhov { 320717335dccSDmitry Monakhov ext4_set_inode_state(inode, EXT4_STATE_DIOREAD_LOCK); 320817335dccSDmitry Monakhov smp_mb(); 320917335dccSDmitry Monakhov } 321017335dccSDmitry Monakhov static inline void ext4_inode_resume_unlocked_dio(struct inode *inode) 321117335dccSDmitry Monakhov { 321217335dccSDmitry Monakhov smp_mb(); 321317335dccSDmitry Monakhov ext4_clear_inode_state(inode, EXT4_STATE_DIOREAD_LOCK); 321417335dccSDmitry Monakhov } 321517335dccSDmitry Monakhov 3216731eb1a0SAkinobu Mita #define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1) 3217731eb1a0SAkinobu Mita 3218e9e3bcecSEric Sandeen /* For ioend & aio unwritten conversion wait queues */ 3219e9e3bcecSEric Sandeen #define EXT4_WQ_HASH_SZ 37 3220e9e3bcecSEric Sandeen #define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\ 3221e9e3bcecSEric Sandeen EXT4_WQ_HASH_SZ]) 3222e9e3bcecSEric Sandeen extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 3223e9e3bcecSEric Sandeen 32248f82f840SYongqiang Yang extern int ext4_resize_begin(struct super_block *sb); 32258f82f840SYongqiang Yang extern void ext4_resize_end(struct super_block *sb); 32268f82f840SYongqiang Yang 322774c66bcbSJan Kara static inline void ext4_set_io_unwritten_flag(struct inode *inode, 322874c66bcbSJan Kara struct ext4_io_end *io_end) 322974c66bcbSJan Kara { 323074c66bcbSJan Kara if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) { 323174c66bcbSJan Kara io_end->flag |= EXT4_IO_END_UNWRITTEN; 323274c66bcbSJan Kara atomic_inc(&EXT4_I(inode)->i_unwritten); 323374c66bcbSJan Kara } 323474c66bcbSJan Kara } 323574c66bcbSJan Kara 323674c66bcbSJan Kara static inline void ext4_clear_io_unwritten_flag(ext4_io_end_t *io_end) 323774c66bcbSJan Kara { 323874c66bcbSJan Kara struct inode *inode = io_end->inode; 323974c66bcbSJan Kara 324074c66bcbSJan Kara if (io_end->flag & EXT4_IO_END_UNWRITTEN) { 324174c66bcbSJan Kara io_end->flag &= ~EXT4_IO_END_UNWRITTEN; 324274c66bcbSJan Kara /* Wake up anyone waiting on unwritten extent conversion */ 324374c66bcbSJan Kara if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten)) 324474c66bcbSJan Kara wake_up_all(ext4_ioend_wq(inode)); 324574c66bcbSJan Kara } 324674c66bcbSJan Kara } 324774c66bcbSJan Kara 32488ff6daa1SChristoph Hellwig extern const struct iomap_ops ext4_iomap_ops; 3249364443cbSJan Kara 32503dcf5451SChristoph Hellwig #endif /* __KERNEL__ */ 32513dcf5451SChristoph Hellwig 32526a797d27SDarrick J. Wong #define EFSBADCRC EBADMSG /* Bad CRC detected */ 32536a797d27SDarrick J. Wong #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 32546a797d27SDarrick J. Wong 32553dcf5451SChristoph Hellwig #endif /* _EXT4_H */ 3256