1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0 23dcf5451SChristoph Hellwig /* 33dcf5451SChristoph Hellwig * ext4.h 43dcf5451SChristoph Hellwig * 53dcf5451SChristoph Hellwig * Copyright (C) 1992, 1993, 1994, 1995 63dcf5451SChristoph Hellwig * Remy Card (card@masi.ibp.fr) 73dcf5451SChristoph Hellwig * Laboratoire MASI - Institut Blaise Pascal 83dcf5451SChristoph Hellwig * Universite Pierre et Marie Curie (Paris VI) 93dcf5451SChristoph Hellwig * 103dcf5451SChristoph Hellwig * from 113dcf5451SChristoph Hellwig * 123dcf5451SChristoph Hellwig * linux/include/linux/minix_fs.h 133dcf5451SChristoph Hellwig * 143dcf5451SChristoph Hellwig * Copyright (C) 1991, 1992 Linus Torvalds 153dcf5451SChristoph Hellwig */ 163dcf5451SChristoph Hellwig 173dcf5451SChristoph Hellwig #ifndef _EXT4_H 183dcf5451SChristoph Hellwig #define _EXT4_H 193dcf5451SChristoph Hellwig 2031d21d21SXiyu Yang #include <linux/refcount.h> 213dcf5451SChristoph Hellwig #include <linux/types.h> 223dcf5451SChristoph Hellwig #include <linux/blkdev.h> 233dcf5451SChristoph Hellwig #include <linux/magic.h> 242ccb5fb9SAneesh Kumar K.V #include <linux/jbd2.h> 2560e58e0fSMingming Cao #include <linux/quota.h> 26d444c3c3STheodore Ts'o #include <linux/rwsem.h> 27d444c3c3STheodore Ts'o #include <linux/rbtree.h> 28d444c3c3STheodore Ts'o #include <linux/seqlock.h> 29d444c3c3STheodore Ts'o #include <linux/mutex.h> 30ca0faba0STheodore Ts'o #include <linux/timer.h> 31ca0faba0STheodore Ts'o #include <linux/wait.h> 32174cd4b1SIngo Molnar #include <linux/sched/signal.h> 33ca0faba0STheodore Ts'o #include <linux/blockgroup_lock.h> 34ca0faba0STheodore Ts'o #include <linux/percpu_counter.h> 35efbed4dcSTheodore Ts'o #include <linux/ratelimit.h> 360441984aSDarrick J. Wong #include <crypto/hash.h> 37a633f5a3SLukas Czerner #include <linux/falloc.h> 38c8585c6fSDaeho Jeong #include <linux/percpu-rwsem.h> 3910c5db28SChristoph Hellwig #include <linux/fiemap.h> 404d92dc0fSBen Hutchings #ifdef __KERNEL__ 414d92dc0fSBen Hutchings #include <linux/compat.h> 424d92dc0fSBen Hutchings #endif 433dcf5451SChristoph Hellwig 44734f0d24SDave Chinner #include <linux/fscrypt.h> 45c93d8f88SEric Biggers #include <linux/fsverity.h> 46734f0d24SDave Chinner 47072ebb3bSTheodore Ts'o #include <linux/compiler.h> 48072ebb3bSTheodore Ts'o 493dcf5451SChristoph Hellwig /* 508a35694eSShen Feng * The fourth extended filesystem constants/structures 513dcf5451SChristoph Hellwig */ 523dcf5451SChristoph Hellwig 533dcf5451SChristoph Hellwig /* 54a2821e34SAihua Zhang * with AGGRESSIVE_CHECK allocator runs consistency checks over 55a2821e34SAihua Zhang * structures. these checks slow things down a lot 56a2821e34SAihua Zhang */ 57a2821e34SAihua Zhang #define AGGRESSIVE_CHECK__ 58a2821e34SAihua Zhang 59a2821e34SAihua Zhang /* 60a2821e34SAihua Zhang * with DOUBLE_CHECK defined mballoc creates persistent in-core 61a2821e34SAihua Zhang * bitmaps, maintains and uses them to check for double allocations 62a2821e34SAihua Zhang */ 63a2821e34SAihua Zhang #define DOUBLE_CHECK__ 64a2821e34SAihua Zhang 65a2821e34SAihua Zhang /* 663dcf5451SChristoph Hellwig * Define EXT4FS_DEBUG to produce debug messages 673dcf5451SChristoph Hellwig */ 683dcf5451SChristoph Hellwig #undef EXT4FS_DEBUG 693dcf5451SChristoph Hellwig 703dcf5451SChristoph Hellwig /* 713dcf5451SChristoph Hellwig * Debug code 723dcf5451SChristoph Hellwig */ 733dcf5451SChristoph Hellwig #ifdef EXT4FS_DEBUG 743dcf5451SChristoph Hellwig #define ext4_debug(f, a...) \ 753dcf5451SChristoph Hellwig do { \ 763dcf5451SChristoph Hellwig printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ 774db9c54aSStoyan Gaydarov __FILE__, __LINE__, __func__); \ 783dcf5451SChristoph Hellwig printk(KERN_DEBUG f, ## a); \ 793dcf5451SChristoph Hellwig } while (0) 803dcf5451SChristoph Hellwig #else 81ace36ad4SJoe Perches #define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) 823dcf5451SChristoph Hellwig #endif 833dcf5451SChristoph Hellwig 844a092d73STheodore Ts'o /* 8570aa1554SRitesh Harjani * Turn on EXT_DEBUG to enable ext4_ext_show_path/leaf/move in extents.c 864a092d73STheodore Ts'o */ 874a092d73STheodore Ts'o #define EXT_DEBUG__ 8870aa1554SRitesh Harjani 8970aa1554SRitesh Harjani /* 9070aa1554SRitesh Harjani * Dynamic printk for controlled extents debugging. 9170aa1554SRitesh Harjani */ 9270aa1554SRitesh Harjani #ifdef CONFIG_EXT4_DEBUG 9370aa1554SRitesh Harjani #define ext_debug(ino, fmt, ...) \ 9470aa1554SRitesh Harjani pr_debug("[%s/%d] EXT4-fs (%s): ino %lu: (%s, %d): %s:" fmt, \ 9570aa1554SRitesh Harjani current->comm, task_pid_nr(current), \ 9670aa1554SRitesh Harjani ino->i_sb->s_id, ino->i_ino, __FILE__, __LINE__, \ 9770aa1554SRitesh Harjani __func__, ##__VA_ARGS__) 984a092d73STheodore Ts'o #else 9970aa1554SRitesh Harjani #define ext_debug(ino, fmt, ...) no_printk(fmt, ##__VA_ARGS__) 1004a092d73STheodore Ts'o #endif 1014a092d73STheodore Ts'o 102837c23fbSChunguang Xu #define ASSERT(assert) \ 103837c23fbSChunguang Xu do { \ 104837c23fbSChunguang Xu if (unlikely(!(assert))) { \ 105837c23fbSChunguang Xu printk(KERN_EMERG \ 106837c23fbSChunguang Xu "Assertion failure in %s() at %s:%d: '%s'\n", \ 107837c23fbSChunguang Xu __func__, __FILE__, __LINE__, #assert); \ 108837c23fbSChunguang Xu BUG(); \ 109837c23fbSChunguang Xu } \ 110837c23fbSChunguang Xu } while (0) 111837c23fbSChunguang Xu 112d444c3c3STheodore Ts'o /* data type for block offset of block group */ 113d444c3c3STheodore Ts'o typedef int ext4_grpblk_t; 114d444c3c3STheodore Ts'o 115d444c3c3STheodore Ts'o /* data type for filesystem-wide blocks number */ 116d444c3c3STheodore Ts'o typedef unsigned long long ext4_fsblk_t; 117d444c3c3STheodore Ts'o 118d444c3c3STheodore Ts'o /* data type for file logical block number */ 119d444c3c3STheodore Ts'o typedef __u32 ext4_lblk_t; 120d444c3c3STheodore Ts'o 121d444c3c3STheodore Ts'o /* data type for block group number */ 122d444c3c3STheodore Ts'o typedef unsigned int ext4_group_t; 123d444c3c3STheodore Ts'o 124331573feSNamjae Jeon enum SHIFT_DIRECTION { 125331573feSNamjae Jeon SHIFT_LEFT = 0, 126331573feSNamjae Jeon SHIFT_RIGHT, 127331573feSNamjae Jeon }; 128331573feSNamjae Jeon 129296c355cSTheodore Ts'o /* 130296c355cSTheodore Ts'o * Flags used in mballoc's allocation_context flags field. 131296c355cSTheodore Ts'o * 132296c355cSTheodore Ts'o * Also used to show what's going on for debugging purposes when the 133296c355cSTheodore Ts'o * flag field is exported via the traceport interface 134296c355cSTheodore Ts'o */ 135d444c3c3STheodore Ts'o 1363dcf5451SChristoph Hellwig /* prefer goal again. length */ 1370ef90db9STheodore Ts'o #define EXT4_MB_HINT_MERGE 0x0001 1383dcf5451SChristoph Hellwig /* blocks already reserved */ 1390ef90db9STheodore Ts'o #define EXT4_MB_HINT_RESERVED 0x0002 1403dcf5451SChristoph Hellwig /* metadata is being allocated */ 1410ef90db9STheodore Ts'o #define EXT4_MB_HINT_METADATA 0x0004 1423dcf5451SChristoph Hellwig /* first blocks in the file */ 1430ef90db9STheodore Ts'o #define EXT4_MB_HINT_FIRST 0x0008 1443dcf5451SChristoph Hellwig /* search for the best chunk */ 1450ef90db9STheodore Ts'o #define EXT4_MB_HINT_BEST 0x0010 1463dcf5451SChristoph Hellwig /* data is being allocated */ 1470ef90db9STheodore Ts'o #define EXT4_MB_HINT_DATA 0x0020 1483dcf5451SChristoph Hellwig /* don't preallocate (for tails) */ 1490ef90db9STheodore Ts'o #define EXT4_MB_HINT_NOPREALLOC 0x0040 1503dcf5451SChristoph Hellwig /* allocate for locality group */ 1510ef90db9STheodore Ts'o #define EXT4_MB_HINT_GROUP_ALLOC 0x0080 1523dcf5451SChristoph Hellwig /* allocate goal blocks or none */ 1530ef90db9STheodore Ts'o #define EXT4_MB_HINT_GOAL_ONLY 0x0100 1543dcf5451SChristoph Hellwig /* goal is meaningful */ 1550ef90db9STheodore Ts'o #define EXT4_MB_HINT_TRY_GOAL 0x0200 156d2a17637SMingming Cao /* blocks already pre-reserved by delayed allocation */ 1570ef90db9STheodore Ts'o #define EXT4_MB_DELALLOC_RESERVED 0x0400 1584ba74d00STheodore Ts'o /* We are doing stream allocation */ 1594ba74d00STheodore Ts'o #define EXT4_MB_STREAM_ALLOC 0x0800 16055f020dbSAllison Henderson /* Use reserved root blocks if needed */ 16155f020dbSAllison Henderson #define EXT4_MB_USE_ROOT_BLOCKS 0x1000 16227dd4385SLukas Czerner /* Use blocks from reserved pool */ 16327dd4385SLukas Czerner #define EXT4_MB_USE_RESERVED 0x2000 16499377830SRitesh Harjani /* Do strict check for free blocks while retrying block allocation */ 16599377830SRitesh Harjani #define EXT4_MB_STRICT_CHECK 0x4000 166196e402aSHarshad Shirwadkar /* Large fragment size list lookup succeeded at least once for cr = 0 */ 167196e402aSHarshad Shirwadkar #define EXT4_MB_CR0_OPTIMIZED 0x8000 168196e402aSHarshad Shirwadkar /* Avg fragment size rb tree lookup succeeded at least once for cr = 1 */ 169196e402aSHarshad Shirwadkar #define EXT4_MB_CR1_OPTIMIZED 0x00010000 1703dcf5451SChristoph Hellwig struct ext4_allocation_request { 1713dcf5451SChristoph Hellwig /* target inode for block we're allocating */ 1723dcf5451SChristoph Hellwig struct inode *inode; 1733dcf5451SChristoph Hellwig /* how many blocks we want to allocate */ 174498e5f24STheodore Ts'o unsigned int len; 175726447d8SEric Sandeen /* logical block in target inode */ 176726447d8SEric Sandeen ext4_lblk_t logical; 177726447d8SEric Sandeen /* the closest logical allocated block to the left */ 178726447d8SEric Sandeen ext4_lblk_t lleft; 179726447d8SEric Sandeen /* the closest logical allocated block to the right */ 180726447d8SEric Sandeen ext4_lblk_t lright; 181726447d8SEric Sandeen /* phys. target (a hint) */ 182726447d8SEric Sandeen ext4_fsblk_t goal; 183726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the left */ 184726447d8SEric Sandeen ext4_fsblk_t pleft; 185726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the right */ 186726447d8SEric Sandeen ext4_fsblk_t pright; 1873dcf5451SChristoph Hellwig /* flags. see above EXT4_MB_HINT_* */ 188498e5f24STheodore Ts'o unsigned int flags; 1893dcf5451SChristoph Hellwig }; 1903dcf5451SChristoph Hellwig 1913dcf5451SChristoph Hellwig /* 192e35fd660STheodore Ts'o * Logical to physical block mapping, used by ext4_map_blocks() 193e35fd660STheodore Ts'o * 194e35fd660STheodore Ts'o * This structure is used to pass requests into ext4_map_blocks() as 195e35fd660STheodore Ts'o * well as to store the information returned by ext4_map_blocks(). It 196e35fd660STheodore Ts'o * takes less room on the stack than a struct buffer_head. 197e35fd660STheodore Ts'o */ 1986db07461SRitesh Harjani #define EXT4_MAP_NEW BIT(BH_New) 1996db07461SRitesh Harjani #define EXT4_MAP_MAPPED BIT(BH_Mapped) 2006db07461SRitesh Harjani #define EXT4_MAP_UNWRITTEN BIT(BH_Unwritten) 2016db07461SRitesh Harjani #define EXT4_MAP_BOUNDARY BIT(BH_Boundary) 202e35fd660STheodore Ts'o #define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\ 203cbd7584eSJan Kara EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY) 204e35fd660STheodore Ts'o 205e35fd660STheodore Ts'o struct ext4_map_blocks { 206e35fd660STheodore Ts'o ext4_fsblk_t m_pblk; 207e35fd660STheodore Ts'o ext4_lblk_t m_lblk; 208e35fd660STheodore Ts'o unsigned int m_len; 209e35fd660STheodore Ts'o unsigned int m_flags; 210e35fd660STheodore Ts'o }; 211e35fd660STheodore Ts'o 212e35fd660STheodore Ts'o /* 2137727ae52Szhangyi (F) * Block validity checking, system zone rbtree. 2147727ae52Szhangyi (F) */ 2157727ae52Szhangyi (F) struct ext4_system_blocks { 2167727ae52Szhangyi (F) struct rb_root root; 2177727ae52Szhangyi (F) struct rcu_head rcu; 2187727ae52Szhangyi (F) }; 2197727ae52Szhangyi (F) 2207727ae52Szhangyi (F) /* 221bd2d0210STheodore Ts'o * Flags for ext4_io_end->flags 222bd2d0210STheodore Ts'o */ 223bd2d0210STheodore Ts'o #define EXT4_IO_END_UNWRITTEN 0x0001 224bd2d0210STheodore Ts'o 225c8cc8816SRitesh Harjani struct ext4_io_end_vec { 226c8cc8816SRitesh Harjani struct list_head list; /* list of io_end_vec */ 227c8cc8816SRitesh Harjani loff_t offset; /* offset in the file */ 228c8cc8816SRitesh Harjani ssize_t size; /* size of the extent */ 229c8cc8816SRitesh Harjani }; 230c8cc8816SRitesh Harjani 2314188188bSCurt Wohlgemuth /* 232556615dcSLukas Czerner * For converting unwritten extents on a work queue. 'handle' is used for 2336b523df4SJan Kara * buffered writeback. 2344188188bSCurt Wohlgemuth */ 2350031462bSMingming Cao typedef struct ext4_io_end { 2365b3ff237Sjiayingz@google.com (Jiaying Zhang) struct list_head list; /* per-file finished IO list */ 2376b523df4SJan Kara handle_t *handle; /* handle reserved for extent 2386b523df4SJan Kara * conversion */ 2390031462bSMingming Cao struct inode *inode; /* file being written to */ 240b0857d30SJan Kara struct bio *bio; /* Linked list of completed 241b0857d30SJan Kara * bios covering the extent */ 2428d5d02e6SMingming Cao unsigned int flag; /* unwritten or not */ 24331d21d21SXiyu Yang refcount_t count; /* reference counter */ 244c8cc8816SRitesh Harjani struct list_head list_vec; /* list of ext4_io_end_vec */ 2450031462bSMingming Cao } ext4_io_end_t; 2460031462bSMingming Cao 247bd2d0210STheodore Ts'o struct ext4_io_submit { 2485a33911fSTejun Heo struct writeback_control *io_wbc; 249bd2d0210STheodore Ts'o struct bio *io_bio; 250bd2d0210STheodore Ts'o ext4_io_end_t *io_end; 251bd2d0210STheodore Ts'o sector_t io_next_block; 252bd2d0210STheodore Ts'o }; 253bd2d0210STheodore Ts'o 254b3a3ca8cSTheodore Ts'o /* 2553dcf5451SChristoph Hellwig * Special inodes numbers 2563dcf5451SChristoph Hellwig */ 2573dcf5451SChristoph Hellwig #define EXT4_BAD_INO 1 /* Bad blocks inode */ 2583dcf5451SChristoph Hellwig #define EXT4_ROOT_INO 2 /* Root inode */ 259ae812306SAditya Kali #define EXT4_USR_QUOTA_INO 3 /* User quota inode */ 260ae812306SAditya Kali #define EXT4_GRP_QUOTA_INO 4 /* Group quota inode */ 2613dcf5451SChristoph Hellwig #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ 2623dcf5451SChristoph Hellwig #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ 2633dcf5451SChristoph Hellwig #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ 2643dcf5451SChristoph Hellwig #define EXT4_JOURNAL_INO 8 /* Journal inode */ 2653dcf5451SChristoph Hellwig 2663dcf5451SChristoph Hellwig /* First non-reserved inode for old ext4 filesystems */ 2673dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_FIRST_INO 11 2683dcf5451SChristoph Hellwig 2693dcf5451SChristoph Hellwig /* 2703dcf5451SChristoph Hellwig * Maximal count of links to a file 2713dcf5451SChristoph Hellwig */ 2723dcf5451SChristoph Hellwig #define EXT4_LINK_MAX 65000 2733dcf5451SChristoph Hellwig 2743dcf5451SChristoph Hellwig /* 2753dcf5451SChristoph Hellwig * Macro-instructions used to manage several block sizes 2763dcf5451SChristoph Hellwig */ 2773dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_SIZE 1024 2783dcf5451SChristoph Hellwig #define EXT4_MAX_BLOCK_SIZE 65536 2793dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_LOG_SIZE 10 280fb1813f4SCurt Wohlgemuth #define EXT4_MAX_BLOCK_LOG_SIZE 16 2819e47a4c9STheodore Ts'o #define EXT4_MAX_CLUSTER_LOG_SIZE 30 2823dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2833dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) 2843dcf5451SChristoph Hellwig #else 2853dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) 2863dcf5451SChristoph Hellwig #endif 2873dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32)) 288281b5995STheodore Ts'o #define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \ 289281b5995STheodore Ts'o EXT4_SB(s)->s_cluster_bits) 2903dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2913dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) 292281b5995STheodore Ts'o # define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits) 2933dcf5451SChristoph Hellwig #else 2943dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) 2953dcf5451SChristoph Hellwig #endif 2963dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2973dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) 2983dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) 2993dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) 3003dcf5451SChristoph Hellwig #else 3013dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 3023dcf5451SChristoph Hellwig EXT4_GOOD_OLD_INODE_SIZE : \ 3033dcf5451SChristoph Hellwig (s)->s_inode_size) 3043dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 3053dcf5451SChristoph Hellwig EXT4_GOOD_OLD_FIRST_INO : \ 3063dcf5451SChristoph Hellwig (s)->s_first_ino) 3073dcf5451SChristoph Hellwig #endif 3083dcf5451SChristoph Hellwig #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) 309518eaa63SFabian Frederick #define EXT4_MAX_BLOCKS(size, offset, blkbits) \ 310518eaa63SFabian Frederick ((EXT4_BLOCK_ALIGN(size + offset, blkbits) >> blkbits) - (offset >> \ 311518eaa63SFabian Frederick blkbits)) 3123dcf5451SChristoph Hellwig 313d5b8f310STheodore Ts'o /* Translate a block number to a cluster number */ 314d5b8f310STheodore Ts'o #define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits) 315d5b8f310STheodore Ts'o /* Translate a cluster number to a block number */ 316d5b8f310STheodore Ts'o #define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits) 317d5b8f310STheodore Ts'o /* Translate # of blks to # of clusters */ 318d5b8f310STheodore Ts'o #define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \ 319d5b8f310STheodore Ts'o (sbi)->s_cluster_bits) 320f5a44db5STheodore Ts'o /* Mask out the low bits to get the starting block of the cluster */ 321f5a44db5STheodore Ts'o #define EXT4_PBLK_CMASK(s, pblk) ((pblk) & \ 322f5a44db5STheodore Ts'o ~((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 323f5a44db5STheodore Ts'o #define EXT4_LBLK_CMASK(s, lblk) ((lblk) & \ 324f5a44db5STheodore Ts'o ~((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 3258fcc3a58SEric Whitney /* Fill in the low bits to get the last block of the cluster */ 3268fcc3a58SEric Whitney #define EXT4_LBLK_CFILL(sbi, lblk) ((lblk) | \ 3278fcc3a58SEric Whitney ((ext4_lblk_t) (sbi)->s_cluster_ratio - 1)) 328f5a44db5STheodore Ts'o /* Get the cluster offset */ 329f5a44db5STheodore Ts'o #define EXT4_PBLK_COFF(s, pblk) ((pblk) & \ 330f5a44db5STheodore Ts'o ((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 331f5a44db5STheodore Ts'o #define EXT4_LBLK_COFF(s, lblk) ((lblk) & \ 332f5a44db5STheodore Ts'o ((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 333d5b8f310STheodore Ts'o 3343dcf5451SChristoph Hellwig /* 3353dcf5451SChristoph Hellwig * Structure of a blocks group descriptor 3363dcf5451SChristoph Hellwig */ 3373dcf5451SChristoph Hellwig struct ext4_group_desc 3383dcf5451SChristoph Hellwig { 3393dcf5451SChristoph Hellwig __le32 bg_block_bitmap_lo; /* Blocks bitmap block */ 3403dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ 3413dcf5451SChristoph Hellwig __le32 bg_inode_table_lo; /* Inodes table block */ 342560671a0SAneesh Kumar K.V __le16 bg_free_blocks_count_lo;/* Free blocks count */ 343560671a0SAneesh Kumar K.V __le16 bg_free_inodes_count_lo;/* Free inodes count */ 344560671a0SAneesh Kumar K.V __le16 bg_used_dirs_count_lo; /* Directories count */ 3453dcf5451SChristoph Hellwig __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ 346e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_lo; /* Exclude bitmap for snapshots */ 347e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+bbitmap) LE */ 348e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+ibitmap) LE */ 349560671a0SAneesh Kumar K.V __le16 bg_itable_unused_lo; /* Unused inodes count */ 3503dcf5451SChristoph Hellwig __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ 3513dcf5451SChristoph Hellwig __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ 3523dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ 3533dcf5451SChristoph Hellwig __le32 bg_inode_table_hi; /* Inodes table block MSB */ 3543dcf5451SChristoph Hellwig __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */ 3553dcf5451SChristoph Hellwig __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */ 3563dcf5451SChristoph Hellwig __le16 bg_used_dirs_count_hi; /* Directories count MSB */ 3573dcf5451SChristoph Hellwig __le16 bg_itable_unused_hi; /* Unused inodes count MSB */ 358e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_hi; /* Exclude bitmap block MSB */ 359e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+bbitmap) BE */ 360e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+ibitmap) BE */ 361e6153918SDarrick J. Wong __u32 bg_reserved; 3623dcf5451SChristoph Hellwig }; 3633dcf5451SChristoph Hellwig 36441a246d1SDarrick J. Wong #define EXT4_BG_INODE_BITMAP_CSUM_HI_END \ 36541a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \ 36641a246d1SDarrick J. Wong sizeof(__le16)) 36741a246d1SDarrick J. Wong #define EXT4_BG_BLOCK_BITMAP_CSUM_HI_END \ 36841a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \ 36941a246d1SDarrick J. Wong sizeof(__le16)) 37041a246d1SDarrick J. Wong 371772cb7c8SJose R. Santos /* 372772cb7c8SJose R. Santos * Structure of a flex block group info 373772cb7c8SJose R. Santos */ 374772cb7c8SJose R. Santos 375772cb7c8SJose R. Santos struct flex_groups { 37690ba983fSTheodore Ts'o atomic64_t free_clusters; 3779f24e420STheodore Ts'o atomic_t free_inodes; 3787d39db14STheodore Ts'o atomic_t used_dirs; 379772cb7c8SJose R. Santos }; 380772cb7c8SJose R. Santos 3813dcf5451SChristoph Hellwig #define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ 3823dcf5451SChristoph Hellwig #define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ 3833dcf5451SChristoph Hellwig #define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ 3843dcf5451SChristoph Hellwig 3853dcf5451SChristoph Hellwig /* 3863dcf5451SChristoph Hellwig * Macro-instructions used to manage group descriptors 3873dcf5451SChristoph Hellwig */ 3883dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE 32 3893dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE_64BIT 64 3903dcf5451SChristoph Hellwig #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE 3913dcf5451SChristoph Hellwig #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) 3923dcf5451SChristoph Hellwig #ifdef __KERNEL__ 3933dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) 394281b5995STheodore Ts'o # define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group) 3953dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) 3963dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) 3973dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) 3983dcf5451SChristoph Hellwig #else 3993dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) 4003dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) 4013dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) 4023dcf5451SChristoph Hellwig #endif 4033dcf5451SChristoph Hellwig 4043dcf5451SChristoph Hellwig /* 4053dcf5451SChristoph Hellwig * Constants relative to the data blocks 4063dcf5451SChristoph Hellwig */ 4073dcf5451SChristoph Hellwig #define EXT4_NDIR_BLOCKS 12 4083dcf5451SChristoph Hellwig #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS 4093dcf5451SChristoph Hellwig #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) 4103dcf5451SChristoph Hellwig #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) 4113dcf5451SChristoph Hellwig #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) 4123dcf5451SChristoph Hellwig 4133dcf5451SChristoph Hellwig /* 4143dcf5451SChristoph Hellwig * Inode flags 4153dcf5451SChristoph Hellwig */ 4163dcf5451SChristoph Hellwig #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ 4173dcf5451SChristoph Hellwig #define EXT4_UNRM_FL 0x00000002 /* Undelete */ 4183dcf5451SChristoph Hellwig #define EXT4_COMPR_FL 0x00000004 /* Compress file */ 4193dcf5451SChristoph Hellwig #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ 4203dcf5451SChristoph Hellwig #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ 4213dcf5451SChristoph Hellwig #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ 4223dcf5451SChristoph Hellwig #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ 4233dcf5451SChristoph Hellwig #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ 4243dcf5451SChristoph Hellwig /* Reserved for compression usage... */ 4253dcf5451SChristoph Hellwig #define EXT4_DIRTY_FL 0x00000100 4263dcf5451SChristoph Hellwig #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 4273dcf5451SChristoph Hellwig #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ 4283edc18d8STheodore Ts'o /* nb: was previously EXT2_ECOMPR_FL */ 4293edc18d8STheodore Ts'o #define EXT4_ENCRYPT_FL 0x00000800 /* encrypted file */ 4303dcf5451SChristoph Hellwig /* End compression flags --- maybe not all used */ 4313dcf5451SChristoph Hellwig #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ 4323dcf5451SChristoph Hellwig #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ 4333dcf5451SChristoph Hellwig #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ 4343dcf5451SChristoph Hellwig #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 4353dcf5451SChristoph Hellwig #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ 4363dcf5451SChristoph Hellwig #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 4373dcf5451SChristoph Hellwig #define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ 4383dcf5451SChristoph Hellwig #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ 439c93d8f88SEric Biggers #define EXT4_VERITY_FL 0x00100000 /* Verity protected inode */ 440f710b4b9STheodore Ts'o #define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ 4414337ecd1SEric Whitney /* 0x00400000 was formerly EXT4_EOFBLOCKS_FL */ 442b383a73fSIra Weiny 443b383a73fSIra Weiny #define EXT4_DAX_FL 0x02000000 /* Inode is DAX */ 444b383a73fSIra Weiny 44567cf5b09STao Ma #define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */ 4468b4953e1STheodore Ts'o #define EXT4_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ 447de8ff14cSEric Biggers #define EXT4_CASEFOLD_FL 0x40000000 /* Casefolded directory */ 4483dcf5451SChristoph Hellwig #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ 4493dcf5451SChristoph Hellwig 4502a12e147SEric Biggers /* User modifiable flags */ 4512a12e147SEric Biggers #define EXT4_FL_USER_MODIFIABLE (EXT4_SECRM_FL | \ 4522a12e147SEric Biggers EXT4_UNRM_FL | \ 4532a12e147SEric Biggers EXT4_COMPR_FL | \ 4542a12e147SEric Biggers EXT4_SYNC_FL | \ 4552a12e147SEric Biggers EXT4_IMMUTABLE_FL | \ 4562a12e147SEric Biggers EXT4_APPEND_FL | \ 4572a12e147SEric Biggers EXT4_NODUMP_FL | \ 4582a12e147SEric Biggers EXT4_NOATIME_FL | \ 4592a12e147SEric Biggers EXT4_JOURNAL_DATA_FL | \ 4602a12e147SEric Biggers EXT4_NOTAIL_FL | \ 4612a12e147SEric Biggers EXT4_DIRSYNC_FL | \ 4622a12e147SEric Biggers EXT4_TOPDIR_FL | \ 4632a12e147SEric Biggers EXT4_EXTENTS_FL | \ 4642a12e147SEric Biggers 0x00400000 /* EXT4_EOFBLOCKS_FL */ | \ 4652a12e147SEric Biggers EXT4_DAX_FL | \ 4662a12e147SEric Biggers EXT4_PROJINHERIT_FL | \ 4672a12e147SEric Biggers EXT4_CASEFOLD_FL) 4682a12e147SEric Biggers 4692a12e147SEric Biggers /* User visible flags */ 4702a12e147SEric Biggers #define EXT4_FL_USER_VISIBLE (EXT4_FL_USER_MODIFIABLE | \ 4712a12e147SEric Biggers EXT4_DIRTY_FL | \ 4722a12e147SEric Biggers EXT4_COMPRBLK_FL | \ 4732a12e147SEric Biggers EXT4_NOCOMPR_FL | \ 4742a12e147SEric Biggers EXT4_ENCRYPT_FL | \ 4752a12e147SEric Biggers EXT4_INDEX_FL | \ 4762a12e147SEric Biggers EXT4_VERITY_FL | \ 4772a12e147SEric Biggers EXT4_INLINE_DATA_FL) 4783dcf5451SChristoph Hellwig 4798fa43a81SDuane Griffin /* Flags that should be inherited by new inodes from their parent. */ 4808fa43a81SDuane Griffin #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\ 4811cd9f097STheodore Ts'o EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\ 4828fa43a81SDuane Griffin EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\ 483040cb378SLi Xi EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL |\ 484b383a73fSIra Weiny EXT4_PROJINHERIT_FL | EXT4_CASEFOLD_FL |\ 485b383a73fSIra Weiny EXT4_DAX_FL) 4868fa43a81SDuane Griffin 4872dc6b0d4SDuane Griffin /* Flags that are appropriate for regular files (all but dir-specific ones). */ 4887ddf79a1SWang Shilong #define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL | EXT4_CASEFOLD_FL |\ 4897ddf79a1SWang Shilong EXT4_PROJINHERIT_FL)) 4902dc6b0d4SDuane Griffin 4912dc6b0d4SDuane Griffin /* Flags that are appropriate for non-directories/regular files. */ 4922dc6b0d4SDuane Griffin #define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL) 4932dc6b0d4SDuane Griffin 494abdc644eSyangerkun /* The only flags that should be swapped */ 495abdc644eSyangerkun #define EXT4_FL_SHOULD_SWAP (EXT4_HUGE_FILE_FL | EXT4_EXTENTS_FL) 496abdc644eSyangerkun 497b383a73fSIra Weiny /* Flags which are mutually exclusive to DAX */ 498b383a73fSIra Weiny #define EXT4_DAX_MUT_EXCL (EXT4_VERITY_FL | EXT4_ENCRYPT_FL |\ 499aa2f7792SXiao Yang EXT4_JOURNAL_DATA_FL | EXT4_INLINE_DATA_FL) 500b383a73fSIra Weiny 5012dc6b0d4SDuane Griffin /* Mask out flags that are inappropriate for the given type of inode. */ 5022dc6b0d4SDuane Griffin static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags) 5032dc6b0d4SDuane Griffin { 5042dc6b0d4SDuane Griffin if (S_ISDIR(mode)) 5052dc6b0d4SDuane Griffin return flags; 5062dc6b0d4SDuane Griffin else if (S_ISREG(mode)) 5072dc6b0d4SDuane Griffin return flags & EXT4_REG_FLMASK; 5082dc6b0d4SDuane Griffin else 5092dc6b0d4SDuane Griffin return flags & EXT4_OTHER_FLMASK; 5102dc6b0d4SDuane Griffin } 5112dc6b0d4SDuane Griffin 51212e9b892SDmitry Monakhov /* 51312e9b892SDmitry Monakhov * Inode flags used for atomic set/get 51412e9b892SDmitry Monakhov */ 51512e9b892SDmitry Monakhov enum { 51612e9b892SDmitry Monakhov EXT4_INODE_SECRM = 0, /* Secure deletion */ 51712e9b892SDmitry Monakhov EXT4_INODE_UNRM = 1, /* Undelete */ 51812e9b892SDmitry Monakhov EXT4_INODE_COMPR = 2, /* Compress file */ 51912e9b892SDmitry Monakhov EXT4_INODE_SYNC = 3, /* Synchronous updates */ 52012e9b892SDmitry Monakhov EXT4_INODE_IMMUTABLE = 4, /* Immutable file */ 52112e9b892SDmitry Monakhov EXT4_INODE_APPEND = 5, /* writes to file may only append */ 52212e9b892SDmitry Monakhov EXT4_INODE_NODUMP = 6, /* do not dump file */ 52312e9b892SDmitry Monakhov EXT4_INODE_NOATIME = 7, /* do not update atime */ 52412e9b892SDmitry Monakhov /* Reserved for compression usage... */ 52512e9b892SDmitry Monakhov EXT4_INODE_DIRTY = 8, 52612e9b892SDmitry Monakhov EXT4_INODE_COMPRBLK = 9, /* One or more compressed clusters */ 52712e9b892SDmitry Monakhov EXT4_INODE_NOCOMPR = 10, /* Don't compress */ 528f542fbe8STheodore Ts'o EXT4_INODE_ENCRYPT = 11, /* Encrypted file */ 52912e9b892SDmitry Monakhov /* End compression flags --- maybe not all used */ 53012e9b892SDmitry Monakhov EXT4_INODE_INDEX = 12, /* hash-indexed directory */ 53112e9b892SDmitry Monakhov EXT4_INODE_IMAGIC = 13, /* AFS directory */ 53212e9b892SDmitry Monakhov EXT4_INODE_JOURNAL_DATA = 14, /* file data should be journaled */ 53312e9b892SDmitry Monakhov EXT4_INODE_NOTAIL = 15, /* file tail should not be merged */ 53412e9b892SDmitry Monakhov EXT4_INODE_DIRSYNC = 16, /* dirsync behaviour (directories only) */ 53512e9b892SDmitry Monakhov EXT4_INODE_TOPDIR = 17, /* Top of directory hierarchies*/ 53612e9b892SDmitry Monakhov EXT4_INODE_HUGE_FILE = 18, /* Set to each huge file */ 53712e9b892SDmitry Monakhov EXT4_INODE_EXTENTS = 19, /* Inode uses extents */ 538c93d8f88SEric Biggers EXT4_INODE_VERITY = 20, /* Verity protected inode */ 53912e9b892SDmitry Monakhov EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */ 5404337ecd1SEric Whitney /* 22 was formerly EXT4_INODE_EOFBLOCKS */ 541b383a73fSIra Weiny EXT4_INODE_DAX = 25, /* Inode is DAX */ 54267cf5b09STao Ma EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */ 5438b4953e1STheodore Ts'o EXT4_INODE_PROJINHERIT = 29, /* Create with parents projid */ 544de8ff14cSEric Biggers EXT4_INODE_CASEFOLD = 30, /* Casefolded directory */ 54512e9b892SDmitry Monakhov EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */ 54612e9b892SDmitry Monakhov }; 54712e9b892SDmitry Monakhov 54812e9b892SDmitry Monakhov /* 5499a4c8019SCarlos Maiolino * Since it's pretty easy to mix up bit numbers and hex values, we use a 5509a4c8019SCarlos Maiolino * build-time check to make sure that EXT4_XXX_FL is consistent with respect to 5519a4c8019SCarlos Maiolino * EXT4_INODE_XXX. If all is well, the macros will be dropped, so, it won't cost 5529a4c8019SCarlos Maiolino * any extra space in the compiled kernel image, otherwise, the build will fail. 5539a4c8019SCarlos Maiolino * It's important that these values are the same, since we are using 5549a4c8019SCarlos Maiolino * EXT4_INODE_XXX to test for flag values, but EXT4_XXX_FL must be consistent 5559a4c8019SCarlos Maiolino * with the values of FS_XXX_FL defined in include/linux/fs.h and the on-disk 5569a4c8019SCarlos Maiolino * values found in ext2, ext3 and ext4 filesystems, and of course the values 5579a4c8019SCarlos Maiolino * defined in e2fsprogs. 55812e9b892SDmitry Monakhov * 55912e9b892SDmitry Monakhov * It's not paranoia if the Murphy's Law really *is* out to get you. :-) 56012e9b892SDmitry Monakhov */ 5619a4c8019SCarlos Maiolino #define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG)) 5629a4c8019SCarlos Maiolino #define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG)) 5639a4c8019SCarlos Maiolino 56412e9b892SDmitry Monakhov static inline void ext4_check_flag_values(void) 56512e9b892SDmitry Monakhov { 56612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SECRM); 56712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(UNRM); 56812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPR); 56912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SYNC); 57012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMMUTABLE); 57112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(APPEND); 57212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NODUMP); 57312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOATIME); 57412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRTY); 57512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPRBLK); 57612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOCOMPR); 5773edc18d8STheodore Ts'o CHECK_FLAG_VALUE(ENCRYPT); 57812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(INDEX); 57912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMAGIC); 58012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(JOURNAL_DATA); 58112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOTAIL); 58212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRSYNC); 58312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(TOPDIR); 58412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(HUGE_FILE); 58512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EXTENTS); 586c93d8f88SEric Biggers CHECK_FLAG_VALUE(VERITY); 58712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EA_INODE); 58867cf5b09STao Ma CHECK_FLAG_VALUE(INLINE_DATA); 5898b4953e1STheodore Ts'o CHECK_FLAG_VALUE(PROJINHERIT); 590de8ff14cSEric Biggers CHECK_FLAG_VALUE(CASEFOLD); 59112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(RESERVED); 59212e9b892SDmitry Monakhov } 59312e9b892SDmitry Monakhov 5943dcf5451SChristoph Hellwig /* Used to pass group descriptor data when online resize is done */ 5953dcf5451SChristoph Hellwig struct ext4_new_group_input { 5963dcf5451SChristoph Hellwig __u32 group; /* Group number for this data */ 5973dcf5451SChristoph Hellwig __u64 block_bitmap; /* Absolute block number of block bitmap */ 5983dcf5451SChristoph Hellwig __u64 inode_bitmap; /* Absolute block number of inode bitmap */ 5993dcf5451SChristoph Hellwig __u64 inode_table; /* Absolute block number of inode table start */ 6003dcf5451SChristoph Hellwig __u32 blocks_count; /* Total number of blocks in this group */ 6013dcf5451SChristoph Hellwig __u16 reserved_blocks; /* Number of reserved blocks in this group */ 6023dcf5451SChristoph Hellwig __u16 unused; 6033dcf5451SChristoph Hellwig }; 6043dcf5451SChristoph Hellwig 6054d92dc0fSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 6064d92dc0fSBen Hutchings struct compat_ext4_new_group_input { 6074d92dc0fSBen Hutchings u32 group; 6084d92dc0fSBen Hutchings compat_u64 block_bitmap; 6094d92dc0fSBen Hutchings compat_u64 inode_bitmap; 6104d92dc0fSBen Hutchings compat_u64 inode_table; 6114d92dc0fSBen Hutchings u32 blocks_count; 6124d92dc0fSBen Hutchings u16 reserved_blocks; 6134d92dc0fSBen Hutchings u16 unused; 6144d92dc0fSBen Hutchings }; 6154d92dc0fSBen Hutchings #endif 6164d92dc0fSBen Hutchings 6173dcf5451SChristoph Hellwig /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ 6183dcf5451SChristoph Hellwig struct ext4_new_group_data { 6193dcf5451SChristoph Hellwig __u32 group; 6203dcf5451SChristoph Hellwig __u64 block_bitmap; 6213dcf5451SChristoph Hellwig __u64 inode_bitmap; 6223dcf5451SChristoph Hellwig __u64 inode_table; 6233dcf5451SChristoph Hellwig __u32 blocks_count; 6243dcf5451SChristoph Hellwig __u16 reserved_blocks; 625d77147ffSharshads __u16 mdata_blocks; 626d77147ffSharshads __u32 free_clusters_count; 6273dcf5451SChristoph Hellwig }; 6283dcf5451SChristoph Hellwig 62933afdcc5SYongqiang Yang /* Indexes used to index group tables in ext4_new_group_data */ 63033afdcc5SYongqiang Yang enum { 63133afdcc5SYongqiang Yang BLOCK_BITMAP = 0, /* block bitmap */ 63233afdcc5SYongqiang Yang INODE_BITMAP, /* inode bitmap */ 63333afdcc5SYongqiang Yang INODE_TABLE, /* inode tables */ 63433afdcc5SYongqiang Yang GROUP_TABLE_COUNT, 63533afdcc5SYongqiang Yang }; 63633afdcc5SYongqiang Yang 6373dcf5451SChristoph Hellwig /* 63879e83036SEric Sandeen * Flags used by ext4_map_blocks() 6393dcf5451SChristoph Hellwig */ 640556615dcSLukas Czerner /* Allocate any needed blocks and/or convert an unwritten 641c2177057STheodore Ts'o extent to be an initialized ext4 */ 6422ac3b6e0STheodore Ts'o #define EXT4_GET_BLOCKS_CREATE 0x0001 643556615dcSLukas Czerner /* Request the creation of an unwritten extent */ 644556615dcSLukas Czerner #define EXT4_GET_BLOCKS_UNWRIT_EXT 0x0002 645556615dcSLukas Czerner #define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT (EXT4_GET_BLOCKS_UNWRIT_EXT|\ 646c2177057STheodore Ts'o EXT4_GET_BLOCKS_CREATE) 64727dd4385SLukas Czerner /* Caller is from the delayed allocation writeout path 64827dd4385SLukas Czerner * finally doing the actual allocation of delayed blocks */ 64903f5d8bcSJan Kara #define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004 6500031462bSMingming Cao /* caller is from the direct IO path, request to creation of an 651556615dcSLukas Czerner unwritten extents if not allocated, split the unwritten 6520031462bSMingming Cao extent if blocks has been preallocated already*/ 653c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_PRE_IO 0x0008 6541296cc85SAneesh Kumar K.V #define EXT4_GET_BLOCKS_CONVERT 0x0010 655c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\ 656556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 657c7064ef1SJiaying Zhang /* Convert extent to initialized after IO complete */ 658c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\ 659556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 66027dd4385SLukas Czerner /* Eventual metadata allocation (due to growing extent tree) 66127dd4385SLukas Czerner * should not fail, so try to use reserved blocks for that.*/ 66227dd4385SLukas Czerner #define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020 663556b27abSVivek Haldar /* Don't normalize allocation size (used for fallocate) */ 664556b27abSVivek Haldar #define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040 665b8a86845SLukas Czerner /* Convert written extents to unwritten */ 6662dcba478SJan Kara #define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN 0x0100 667c86d8db3SJan Kara /* Write zeros to newly created written extents */ 668c86d8db3SJan Kara #define EXT4_GET_BLOCKS_ZERO 0x0200 669c86d8db3SJan Kara #define EXT4_GET_BLOCKS_CREATE_ZERO (EXT4_GET_BLOCKS_CREATE |\ 670c86d8db3SJan Kara EXT4_GET_BLOCKS_ZERO) 671ee0876bcSJan Kara /* Caller will submit data before dropping transaction handle. This 672ee0876bcSJan Kara * allows jbd2 to avoid submitting data before commit. */ 673ee0876bcSJan Kara #define EXT4_GET_BLOCKS_IO_SUBMIT 0x0400 6749558cf14SZhang Yi /* Caller is in the atomic contex, find extent if it has been cached */ 6759558cf14SZhang Yi #define EXT4_GET_BLOCKS_CACHED_NOWAIT 0x0800 6763dcf5451SChristoph Hellwig 6773dcf5451SChristoph Hellwig /* 6787869a4a6STheodore Ts'o * The bit position of these flags must not overlap with any of the 679ed8a1a76STheodore Ts'o * EXT4_GET_BLOCKS_*. They are used by ext4_find_extent(), 680107a7bd3STheodore Ts'o * read_extent_tree_block(), ext4_split_extent_at(), 6817869a4a6STheodore Ts'o * ext4_ext_insert_extent(), and ext4_ext_create_new_leaf(). 6827869a4a6STheodore Ts'o * EXT4_EX_NOCACHE is used to indicate that the we shouldn't be 6837869a4a6STheodore Ts'o * caching the extents when reading from the extent tree while a 6847869a4a6STheodore Ts'o * truncate or punch hole operation is in progress. 685107a7bd3STheodore Ts'o */ 686d26e2c4dSTheodore Ts'o #define EXT4_EX_NOCACHE 0x40000000 687d26e2c4dSTheodore Ts'o #define EXT4_EX_FORCE_CACHE 0x20000000 68873c384c0STheodore Ts'o #define EXT4_EX_NOFAIL 0x10000000 689107a7bd3STheodore Ts'o 690107a7bd3STheodore Ts'o /* 691e6362609STheodore Ts'o * Flags used by ext4_free_blocks 692e6362609STheodore Ts'o */ 693e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_METADATA 0x0001 694e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_FORGET 0x0002 6951f2acb60STheodore Ts'o #define EXT4_FREE_BLOCKS_VALIDATED 0x0004 6967132de74SMaxim Patlasov #define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008 69784130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010 69884130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020 6999fe67149SEric Whitney #define EXT4_FREE_BLOCKS_RERESERVE_CLUSTER 0x0040 700e6362609STheodore Ts'o 701e6362609STheodore Ts'o /* 7023dcf5451SChristoph Hellwig * ioctl commands 7033dcf5451SChristoph Hellwig */ 7043dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION _IOR('f', 3, long) 7053dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION _IOW('f', 4, long) 7063dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION 7073dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION 7083dcf5451SChristoph Hellwig #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) 7093dcf5451SChristoph Hellwig #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) 7108eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) 7118eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) 7128eea80d5STheodore Ts'o #define EXT4_IOC_MIGRATE _IO('f', 9) 713ccd2506bSTheodore Ts'o /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */ 7148eea80d5STheodore Ts'o /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ 715ccd2506bSTheodore Ts'o #define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12) 716748de673SAkira Fujita #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent) 71719c5246dSYongqiang Yang #define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) 718393d1d1dSDr. Tilmann Bubeck #define EXT4_IOC_SWAP_BOOT _IO('f', 17) 7197869a4a6STheodore Ts'o #define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18) 720b0c013e2STheodore Ts'o /* ioctl codes 19--39 are reserved for fscrypt */ 721b0c013e2STheodore Ts'o #define EXT4_IOC_CLEAR_ES_CACHE _IO('f', 40) 7221ad3ea6eSTheodore Ts'o #define EXT4_IOC_GETSTATE _IOW('f', 41, __u32) 723bb5835edSTheodore Ts'o #define EXT4_IOC_GET_ES_CACHE _IOWR('f', 42, struct fiemap) 724351a0a3fSLeah Rumancik #define EXT4_IOC_CHECKPOINT _IOW('f', 43, __u32) 725d95efb14SJeremy Bongio #define EXT4_IOC_GETFSUUID _IOR('f', 44, struct fsuuid) 726d95efb14SJeremy Bongio #define EXT4_IOC_SETFSUUID _IOW('f', 44, struct fsuuid) 7273dcf5451SChristoph Hellwig 728e9be2ac7STheodore Ts'o #define EXT4_IOC_SHUTDOWN _IOR ('X', 125, __u32) 729783d9485STheodore Ts'o 730783d9485STheodore Ts'o /* 731783d9485STheodore Ts'o * Flags for going down operation 732783d9485STheodore Ts'o */ 733783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_DEFAULT 0x0 /* going down */ 734783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */ 735783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */ 736783d9485STheodore Ts'o 7371ad3ea6eSTheodore Ts'o /* 7381ad3ea6eSTheodore Ts'o * Flags returned by EXT4_IOC_GETSTATE 7391ad3ea6eSTheodore Ts'o * 7401ad3ea6eSTheodore Ts'o * We only expose to userspace a subset of the state flags in 7411ad3ea6eSTheodore Ts'o * i_state_flags 7421ad3ea6eSTheodore Ts'o */ 7431ad3ea6eSTheodore Ts'o #define EXT4_STATE_FLAG_EXT_PRECACHED 0x00000001 7441ad3ea6eSTheodore Ts'o #define EXT4_STATE_FLAG_NEW 0x00000002 7451ad3ea6eSTheodore Ts'o #define EXT4_STATE_FLAG_NEWENTRY 0x00000004 7461ad3ea6eSTheodore Ts'o #define EXT4_STATE_FLAG_DA_ALLOC_CLOSE 0x00000008 747783d9485STheodore Ts'o 748351a0a3fSLeah Rumancik /* flags for ioctl EXT4_IOC_CHECKPOINT */ 749351a0a3fSLeah Rumancik #define EXT4_IOC_CHECKPOINT_FLAG_DISCARD 0x1 750351a0a3fSLeah Rumancik #define EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT 0x2 751351a0a3fSLeah Rumancik #define EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN 0x4 752351a0a3fSLeah Rumancik #define EXT4_IOC_CHECKPOINT_FLAG_VALID (EXT4_IOC_CHECKPOINT_FLAG_DISCARD | \ 753351a0a3fSLeah Rumancik EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT | \ 754351a0a3fSLeah Rumancik EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN) 755351a0a3fSLeah Rumancik 756d95efb14SJeremy Bongio /* 757d95efb14SJeremy Bongio * Structure for EXT4_IOC_GETFSUUID/EXT4_IOC_SETFSUUID 758d95efb14SJeremy Bongio */ 759d95efb14SJeremy Bongio struct fsuuid { 760d95efb14SJeremy Bongio __u32 fsu_len; 761d95efb14SJeremy Bongio __u32 fsu_flags; 762d95efb14SJeremy Bongio __u8 fsu_uuid[]; 763d95efb14SJeremy Bongio }; 764d95efb14SJeremy Bongio 765899ad0ceSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 7663dcf5451SChristoph Hellwig /* 7673dcf5451SChristoph Hellwig * ioctl commands in 32 bit emulation 7683dcf5451SChristoph Hellwig */ 7693dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) 7703dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) 7713dcf5451SChristoph Hellwig #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) 7723dcf5451SChristoph Hellwig #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) 7733dcf5451SChristoph Hellwig #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) 7744d92dc0fSBen Hutchings #define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input) 7753dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION 7763dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION 777899ad0ceSBen Hutchings #endif 7783dcf5451SChristoph Hellwig 779bb5835edSTheodore Ts'o /* 780bb5835edSTheodore Ts'o * Returned by EXT4_IOC_GET_ES_CACHE as an additional possible flag. 781bb5835edSTheodore Ts'o * It indicates that the entry in extent status cache is for a hole. 782bb5835edSTheodore Ts'o */ 783bb5835edSTheodore Ts'o #define EXT4_FIEMAP_EXTENT_HOLE 0x08000000 784bb5835edSTheodore Ts'o 785b595076aSUwe Kleine-König /* Max physical block we can address w/o extents */ 786fb0a387dSEric Sandeen #define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF 787fb0a387dSEric Sandeen 788bcd8e91fSTheodore Ts'o /* Max logical block we can support */ 7899f44eda1SRitesh Harjani #define EXT4_MAX_LOGICAL_BLOCK 0xFFFFFFFE 790bcd8e91fSTheodore Ts'o 7913dcf5451SChristoph Hellwig /* 7923dcf5451SChristoph Hellwig * Structure of an inode on the disk 7933dcf5451SChristoph Hellwig */ 7943dcf5451SChristoph Hellwig struct ext4_inode { 7953dcf5451SChristoph Hellwig __le16 i_mode; /* File mode */ 7963dcf5451SChristoph Hellwig __le16 i_uid; /* Low 16 bits of Owner Uid */ 7973dcf5451SChristoph Hellwig __le32 i_size_lo; /* Size in bytes */ 7983dcf5451SChristoph Hellwig __le32 i_atime; /* Access time */ 7993dcf5451SChristoph Hellwig __le32 i_ctime; /* Inode Change time */ 8003dcf5451SChristoph Hellwig __le32 i_mtime; /* Modification time */ 8013dcf5451SChristoph Hellwig __le32 i_dtime; /* Deletion Time */ 8023dcf5451SChristoph Hellwig __le16 i_gid; /* Low 16 bits of Group Id */ 8033dcf5451SChristoph Hellwig __le16 i_links_count; /* Links count */ 8043dcf5451SChristoph Hellwig __le32 i_blocks_lo; /* Blocks count */ 8053dcf5451SChristoph Hellwig __le32 i_flags; /* File flags */ 8063dcf5451SChristoph Hellwig union { 8073dcf5451SChristoph Hellwig struct { 8083dcf5451SChristoph Hellwig __le32 l_i_version; 8093dcf5451SChristoph Hellwig } linux1; 8103dcf5451SChristoph Hellwig struct { 8113dcf5451SChristoph Hellwig __u32 h_i_translator; 8123dcf5451SChristoph Hellwig } hurd1; 8133dcf5451SChristoph Hellwig struct { 8143dcf5451SChristoph Hellwig __u32 m_i_reserved1; 8153dcf5451SChristoph Hellwig } masix1; 8163dcf5451SChristoph Hellwig } osd1; /* OS dependent 1 */ 8173dcf5451SChristoph Hellwig __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ 8183dcf5451SChristoph Hellwig __le32 i_generation; /* File version (for NFS) */ 8193dcf5451SChristoph Hellwig __le32 i_file_acl_lo; /* File ACL */ 8203dcf5451SChristoph Hellwig __le32 i_size_high; 8213dcf5451SChristoph Hellwig __le32 i_obso_faddr; /* Obsoleted fragment address */ 8223dcf5451SChristoph Hellwig union { 8233dcf5451SChristoph Hellwig struct { 8243dcf5451SChristoph Hellwig __le16 l_i_blocks_high; /* were l_i_reserved1 */ 8253dcf5451SChristoph Hellwig __le16 l_i_file_acl_high; 8263dcf5451SChristoph Hellwig __le16 l_i_uid_high; /* these 2 fields */ 8273dcf5451SChristoph Hellwig __le16 l_i_gid_high; /* were reserved2[0] */ 828e6153918SDarrick J. Wong __le16 l_i_checksum_lo;/* crc32c(uuid+inum+inode) LE */ 829e6153918SDarrick J. Wong __le16 l_i_reserved; 8303dcf5451SChristoph Hellwig } linux2; 8313dcf5451SChristoph Hellwig struct { 8323dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 8333dcf5451SChristoph Hellwig __u16 h_i_mode_high; 8343dcf5451SChristoph Hellwig __u16 h_i_uid_high; 8353dcf5451SChristoph Hellwig __u16 h_i_gid_high; 8363dcf5451SChristoph Hellwig __u32 h_i_author; 8373dcf5451SChristoph Hellwig } hurd2; 8383dcf5451SChristoph Hellwig struct { 8393dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 8403dcf5451SChristoph Hellwig __le16 m_i_file_acl_high; 8413dcf5451SChristoph Hellwig __u32 m_i_reserved2[2]; 8423dcf5451SChristoph Hellwig } masix2; 8433dcf5451SChristoph Hellwig } osd2; /* OS dependent 2 */ 8443dcf5451SChristoph Hellwig __le16 i_extra_isize; 845e6153918SDarrick J. Wong __le16 i_checksum_hi; /* crc32c(uuid+inum+inode) BE */ 8463dcf5451SChristoph Hellwig __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ 8473dcf5451SChristoph Hellwig __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ 8483dcf5451SChristoph Hellwig __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ 8493dcf5451SChristoph Hellwig __le32 i_crtime; /* File Creation time */ 8503dcf5451SChristoph Hellwig __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ 8513dcf5451SChristoph Hellwig __le32 i_version_hi; /* high 32 bits for 64-bit version */ 8528b4953e1STheodore Ts'o __le32 i_projid; /* Project ID */ 8533dcf5451SChristoph Hellwig }; 8543dcf5451SChristoph Hellwig 855748de673SAkira Fujita struct move_extent { 856748de673SAkira Fujita __u32 reserved; /* should be zero */ 857748de673SAkira Fujita __u32 donor_fd; /* donor file descriptor */ 858748de673SAkira Fujita __u64 orig_start; /* logical start offset in block for orig */ 859748de673SAkira Fujita __u64 donor_start; /* logical start offset in block for donor */ 860748de673SAkira Fujita __u64 len; /* block length to be moved */ 861748de673SAkira Fujita __u64 moved_len; /* moved block length */ 862748de673SAkira Fujita }; 8633dcf5451SChristoph Hellwig 8643dcf5451SChristoph Hellwig #define EXT4_EPOCH_BITS 2 8653dcf5451SChristoph Hellwig #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) 8663dcf5451SChristoph Hellwig #define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) 8673dcf5451SChristoph Hellwig 8683dcf5451SChristoph Hellwig /* 8693dcf5451SChristoph Hellwig * Extended fields will fit into an inode if the filesystem was formatted 8703dcf5451SChristoph Hellwig * with large inodes (-I 256 or larger) and there are not currently any EAs 8713dcf5451SChristoph Hellwig * consuming all of the available space. For new inodes we always reserve 8723dcf5451SChristoph Hellwig * enough space for the kernel's known extended fields, but for inodes 8733dcf5451SChristoph Hellwig * created with an old kernel this might not have been the case. None of 8743dcf5451SChristoph Hellwig * the extended inode fields is critical for correct filesystem operation. 8753dcf5451SChristoph Hellwig * This macro checks if a certain field fits in the inode. Note that 8763dcf5451SChristoph Hellwig * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize 8773dcf5451SChristoph Hellwig */ 8783dcf5451SChristoph Hellwig #define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \ 8793dcf5451SChristoph Hellwig ((offsetof(typeof(*ext4_inode), field) + \ 8803dcf5451SChristoph Hellwig sizeof((ext4_inode)->field)) \ 8813dcf5451SChristoph Hellwig <= (EXT4_GOOD_OLD_INODE_SIZE + \ 8823dcf5451SChristoph Hellwig (einode)->i_extra_isize)) \ 8833dcf5451SChristoph Hellwig 884a4dad1aeSDavid Turner /* 885a4dad1aeSDavid Turner * We use an encoding that preserves the times for extra epoch "00": 886a4dad1aeSDavid Turner * 887a4dad1aeSDavid Turner * extra msb of adjust for signed 888a4dad1aeSDavid Turner * epoch 32-bit 32-bit tv_sec to 889a4dad1aeSDavid Turner * bits time decoded 64-bit tv_sec 64-bit tv_sec valid time range 890a4dad1aeSDavid Turner * 0 0 1 -0x80000000..-0x00000001 0x000000000 1901-12-13..1969-12-31 891a4dad1aeSDavid Turner * 0 0 0 0x000000000..0x07fffffff 0x000000000 1970-01-01..2038-01-19 892a4dad1aeSDavid Turner * 0 1 1 0x080000000..0x0ffffffff 0x100000000 2038-01-19..2106-02-07 893a4dad1aeSDavid Turner * 0 1 0 0x100000000..0x17fffffff 0x100000000 2106-02-07..2174-02-25 894a4dad1aeSDavid Turner * 1 0 1 0x180000000..0x1ffffffff 0x200000000 2174-02-25..2242-03-16 895a4dad1aeSDavid Turner * 1 0 0 0x200000000..0x27fffffff 0x200000000 2242-03-16..2310-04-04 896a4dad1aeSDavid Turner * 1 1 1 0x280000000..0x2ffffffff 0x300000000 2310-04-04..2378-04-22 897a4dad1aeSDavid Turner * 1 1 0 0x300000000..0x37fffffff 0x300000000 2378-04-22..2446-05-10 898a4dad1aeSDavid Turner * 899a4dad1aeSDavid Turner * Note that previous versions of the kernel on 64-bit systems would 900a4dad1aeSDavid Turner * incorrectly use extra epoch bits 1,1 for dates between 1901 and 901a4dad1aeSDavid Turner * 1970. e2fsck will correct this, assuming that it is run on the 902a4dad1aeSDavid Turner * affected filesystem before 2242. 903a4dad1aeSDavid Turner */ 904a4dad1aeSDavid Turner 9057b62b293SArnd Bergmann static inline __le32 ext4_encode_extra_time(struct timespec64 *time) 9063dcf5451SChristoph Hellwig { 9077b62b293SArnd Bergmann u32 extra =((time->tv_sec - (s32)time->tv_sec) >> 32) & EXT4_EPOCH_MASK; 908a4dad1aeSDavid Turner return cpu_to_le32(extra | (time->tv_nsec << EXT4_EPOCH_BITS)); 9093dcf5451SChristoph Hellwig } 9103dcf5451SChristoph Hellwig 9117b62b293SArnd Bergmann static inline void ext4_decode_extra_time(struct timespec64 *time, 9127b62b293SArnd Bergmann __le32 extra) 9133dcf5451SChristoph Hellwig { 914cd2d9922STheodore Ts'o if (unlikely(extra & cpu_to_le32(EXT4_EPOCH_MASK))) 915a4dad1aeSDavid Turner time->tv_sec += (u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32; 916c1fccc06STheodore Ts'o time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; 9173dcf5451SChristoph Hellwig } 9183dcf5451SChristoph Hellwig 9193dcf5451SChristoph Hellwig #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ 9203dcf5451SChristoph Hellwig do { \ 92195582b00SDeepa Dinamani if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) {\ 9224881c497SDeepa Dinamani (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ 9233dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 9247b62b293SArnd Bergmann ext4_encode_extra_time(&(inode)->xtime); \ 92595582b00SDeepa Dinamani } \ 926cba465b4SDeepa Dinamani else \ 9274881c497SDeepa Dinamani (raw_inode)->xtime = cpu_to_le32(clamp_t(int32_t, (inode)->xtime.tv_sec, S32_MIN, S32_MAX)); \ 9283dcf5451SChristoph Hellwig } while (0) 9293dcf5451SChristoph Hellwig 9303dcf5451SChristoph Hellwig #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ 9313dcf5451SChristoph Hellwig do { \ 9323dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 9333dcf5451SChristoph Hellwig (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \ 9343dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 9353dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 9363dcf5451SChristoph Hellwig ext4_encode_extra_time(&(einode)->xtime); \ 9373dcf5451SChristoph Hellwig } while (0) 9383dcf5451SChristoph Hellwig 9393dcf5451SChristoph Hellwig #define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \ 9403dcf5451SChristoph Hellwig do { \ 9413dcf5451SChristoph Hellwig (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \ 94295582b00SDeepa Dinamani if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) { \ 9437b62b293SArnd Bergmann ext4_decode_extra_time(&(inode)->xtime, \ 9443dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 94595582b00SDeepa Dinamani } \ 946af0b44a1SEric Sandeen else \ 947af0b44a1SEric Sandeen (inode)->xtime.tv_nsec = 0; \ 9483dcf5451SChristoph Hellwig } while (0) 9493dcf5451SChristoph Hellwig 95095582b00SDeepa Dinamani 9513dcf5451SChristoph Hellwig #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ 9523dcf5451SChristoph Hellwig do { \ 9533dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 9543dcf5451SChristoph Hellwig (einode)->xtime.tv_sec = \ 9553dcf5451SChristoph Hellwig (signed)le32_to_cpu((raw_inode)->xtime); \ 95619ea8060STheodore Ts'o else \ 95719ea8060STheodore Ts'o (einode)->xtime.tv_sec = 0; \ 9583dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 9593dcf5451SChristoph Hellwig ext4_decode_extra_time(&(einode)->xtime, \ 9603dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 961af0b44a1SEric Sandeen else \ 962af0b44a1SEric Sandeen (einode)->xtime.tv_nsec = 0; \ 9633dcf5451SChristoph Hellwig } while (0) 9643dcf5451SChristoph Hellwig 9653dcf5451SChristoph Hellwig #define i_disk_version osd1.linux1.l_i_version 9663dcf5451SChristoph Hellwig 9673dcf5451SChristoph Hellwig #if defined(__KERNEL__) || defined(__linux__) 9683dcf5451SChristoph Hellwig #define i_reserved1 osd1.linux1.l_i_reserved1 9693dcf5451SChristoph Hellwig #define i_file_acl_high osd2.linux2.l_i_file_acl_high 9703dcf5451SChristoph Hellwig #define i_blocks_high osd2.linux2.l_i_blocks_high 9713dcf5451SChristoph Hellwig #define i_uid_low i_uid 9723dcf5451SChristoph Hellwig #define i_gid_low i_gid 9733dcf5451SChristoph Hellwig #define i_uid_high osd2.linux2.l_i_uid_high 9743dcf5451SChristoph Hellwig #define i_gid_high osd2.linux2.l_i_gid_high 975e6153918SDarrick J. Wong #define i_checksum_lo osd2.linux2.l_i_checksum_lo 9763dcf5451SChristoph Hellwig 9773dcf5451SChristoph Hellwig #elif defined(__GNU__) 9783dcf5451SChristoph Hellwig 9793dcf5451SChristoph Hellwig #define i_translator osd1.hurd1.h_i_translator 9803dcf5451SChristoph Hellwig #define i_uid_high osd2.hurd2.h_i_uid_high 9813dcf5451SChristoph Hellwig #define i_gid_high osd2.hurd2.h_i_gid_high 9823dcf5451SChristoph Hellwig #define i_author osd2.hurd2.h_i_author 9833dcf5451SChristoph Hellwig 9843dcf5451SChristoph Hellwig #elif defined(__masix__) 9853dcf5451SChristoph Hellwig 9863dcf5451SChristoph Hellwig #define i_reserved1 osd1.masix1.m_i_reserved1 9873dcf5451SChristoph Hellwig #define i_file_acl_high osd2.masix2.m_i_file_acl_high 9883dcf5451SChristoph Hellwig #define i_reserved2 osd2.masix2.m_i_reserved2 9893dcf5451SChristoph Hellwig 9903dcf5451SChristoph Hellwig #endif /* defined(__KERNEL__) || defined(__linux__) */ 9913dcf5451SChristoph Hellwig 992c0677e6dSZheng Liu #include "extents_status.h" 9936866d7b3SHarshad Shirwadkar #include "fast_commit.h" 994c0677e6dSZheng Liu 995d444c3c3STheodore Ts'o /* 996daf647d2STheodore Ts'o * Lock subclasses for i_data_sem in the ext4_inode_info structure. 997daf647d2STheodore Ts'o * 998daf647d2STheodore Ts'o * These are needed to avoid lockdep false positives when we need to 999daf647d2STheodore Ts'o * allocate blocks to the quota inode during ext4_map_blocks(), while 1000daf647d2STheodore Ts'o * holding i_data_sem for a normal (non-quota) inode. Since we don't 1001daf647d2STheodore Ts'o * do quota tracking for the quota inode, this avoids deadlock (as 1002daf647d2STheodore Ts'o * well as infinite recursion, since it isn't turtles all the way 1003daf647d2STheodore Ts'o * down...) 1004daf647d2STheodore Ts'o * 1005daf647d2STheodore Ts'o * I_DATA_SEM_NORMAL - Used for most inodes 1006daf647d2STheodore Ts'o * I_DATA_SEM_OTHER - Used by move_inode.c for the second normal inode 1007daf647d2STheodore Ts'o * where the second inode has larger inode number 1008daf647d2STheodore Ts'o * than the first 1009daf647d2STheodore Ts'o * I_DATA_SEM_QUOTA - Used for quota inodes only 1010daf647d2STheodore Ts'o */ 1011daf647d2STheodore Ts'o enum { 1012daf647d2STheodore Ts'o I_DATA_SEM_NORMAL = 0, 1013daf647d2STheodore Ts'o I_DATA_SEM_OTHER, 1014daf647d2STheodore Ts'o I_DATA_SEM_QUOTA, 1015daf647d2STheodore Ts'o }; 1016daf647d2STheodore Ts'o 1017daf647d2STheodore Ts'o 1018daf647d2STheodore Ts'o /* 1019d444c3c3STheodore Ts'o * fourth extended file system inode data in memory 1020d444c3c3STheodore Ts'o */ 1021d444c3c3STheodore Ts'o struct ext4_inode_info { 1022d444c3c3STheodore Ts'o __le32 i_data[15]; /* unconverted */ 1023d444c3c3STheodore Ts'o __u32 i_dtime; 102412e9b892SDmitry Monakhov ext4_fsblk_t i_file_acl; 1025d444c3c3STheodore Ts'o 1026d444c3c3STheodore Ts'o /* 1027d444c3c3STheodore Ts'o * i_block_group is the number of the block group which contains 1028d444c3c3STheodore Ts'o * this file's inode. Constant across the lifetime of the inode, 1029a627b0a7SEric Whitney * it is used for making block allocation decisions - we try to 1030d444c3c3STheodore Ts'o * place a file's data blocks near its inode block, and new inodes 1031d444c3c3STheodore Ts'o * near to their parent directory's inode. 1032d444c3c3STheodore Ts'o */ 1033d444c3c3STheodore Ts'o ext4_group_t i_block_group; 10348a2005d3STheodore Ts'o ext4_lblk_t i_dir_start_lookup; 1035353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 103619f5fb7aSTheodore Ts'o unsigned long i_state_flags; /* Dynamic state flags */ 1037353eb83cSTheodore Ts'o #endif 103812e9b892SDmitry Monakhov unsigned long i_flags; 1039d444c3c3STheodore Ts'o 1040d444c3c3STheodore Ts'o /* 1041d444c3c3STheodore Ts'o * Extended attributes can be read independently of the main file 1042f340b3d9Shongnanli * data. Taking i_rwsem even when reading would cause contention 1043d444c3c3STheodore Ts'o * between readers of EAs and writers of regular file data, so 1044d444c3c3STheodore Ts'o * instead we synchronize on xattr_sem when reading or changing 1045d444c3c3STheodore Ts'o * EAs. 1046d444c3c3STheodore Ts'o */ 1047d444c3c3STheodore Ts'o struct rw_semaphore xattr_sem; 1048d444c3c3STheodore Ts'o 104902f310fcSJan Kara /* 105002f310fcSJan Kara * Inodes with EXT4_STATE_ORPHAN_FILE use i_orphan_idx. Otherwise 105102f310fcSJan Kara * i_orphan is used. 105202f310fcSJan Kara */ 105302f310fcSJan Kara union { 1054d444c3c3STheodore Ts'o struct list_head i_orphan; /* unlinked but open inodes */ 105502f310fcSJan Kara unsigned int i_orphan_idx; /* Index in orphan file */ 105602f310fcSJan Kara }; 1057d444c3c3STheodore Ts'o 1058aa75f4d3SHarshad Shirwadkar /* Fast commit related info */ 1059aa75f4d3SHarshad Shirwadkar 1060b3998b3bSRitesh Harjani /* For tracking dentry create updates */ 1061b3998b3bSRitesh Harjani struct list_head i_fc_dilist; 1062aa75f4d3SHarshad Shirwadkar struct list_head i_fc_list; /* 1063aa75f4d3SHarshad Shirwadkar * inodes that need fast commit 1064aa75f4d3SHarshad Shirwadkar * protected by sbi->s_fc_lock. 1065aa75f4d3SHarshad Shirwadkar */ 1066aa75f4d3SHarshad Shirwadkar 1067aa75f4d3SHarshad Shirwadkar /* Start of lblk range that needs to be committed in this fast commit */ 1068aa75f4d3SHarshad Shirwadkar ext4_lblk_t i_fc_lblk_start; 1069aa75f4d3SHarshad Shirwadkar 1070aa75f4d3SHarshad Shirwadkar /* End of lblk range that needs to be committed in this fast commit */ 1071aa75f4d3SHarshad Shirwadkar ext4_lblk_t i_fc_lblk_len; 1072aa75f4d3SHarshad Shirwadkar 1073aa75f4d3SHarshad Shirwadkar /* Number of ongoing updates on this inode */ 1074aa75f4d3SHarshad Shirwadkar atomic_t i_fc_updates; 1075aa75f4d3SHarshad Shirwadkar 1076aa75f4d3SHarshad Shirwadkar /* Fast commit wait queue for this inode */ 1077aa75f4d3SHarshad Shirwadkar wait_queue_head_t i_fc_wait; 1078aa75f4d3SHarshad Shirwadkar 1079aa75f4d3SHarshad Shirwadkar /* Protect concurrent accesses on i_fc_lblk_start, i_fc_lblk_len */ 1080aa75f4d3SHarshad Shirwadkar struct mutex i_fc_lock; 1081aa75f4d3SHarshad Shirwadkar 1082d444c3c3STheodore Ts'o /* 1083d444c3c3STheodore Ts'o * i_disksize keeps track of what the inode size is ON DISK, not 1084d444c3c3STheodore Ts'o * in memory. During truncate, i_size is set to the new size by 1085d444c3c3STheodore Ts'o * the VFS prior to calling ext4_truncate(), but the filesystem won't 1086d444c3c3STheodore Ts'o * set i_disksize to 0 until the truncate is actually under way. 1087d444c3c3STheodore Ts'o * 1088d444c3c3STheodore Ts'o * The intent is that i_disksize always represents the blocks which 1089d444c3c3STheodore Ts'o * are used by this file. This allows recovery to restart truncate 1090d444c3c3STheodore Ts'o * on orphans if we crash during truncate. We actually write i_disksize 1091d444c3c3STheodore Ts'o * into the on-disk inode when writing inodes out, instead of i_size. 1092d444c3c3STheodore Ts'o * 1093d444c3c3STheodore Ts'o * The only time when i_disksize and i_size may be different is when 1094d444c3c3STheodore Ts'o * a truncate is in progress. The only things which change i_disksize 1095d444c3c3STheodore Ts'o * are ext4_get_block (growth) and ext4_truncate (shrinkth). 1096d444c3c3STheodore Ts'o */ 1097d444c3c3STheodore Ts'o loff_t i_disksize; 1098d444c3c3STheodore Ts'o 1099d444c3c3STheodore Ts'o /* 1100d444c3c3STheodore Ts'o * i_data_sem is for serialising ext4_truncate() against 1101d444c3c3STheodore Ts'o * ext4_getblock(). In the 2.4 ext2 design, great chunks of inode's 1102d444c3c3STheodore Ts'o * data tree are chopped off during truncate. We can't do that in 1103d444c3c3STheodore Ts'o * ext4 because whenever we perform intermediate commits during 1104d444c3c3STheodore Ts'o * truncate, the inode and all the metadata blocks *must* be in a 1105d444c3c3STheodore Ts'o * consistent state which allows truncation of the orphans to restart 1106d444c3c3STheodore Ts'o * during recovery. Hence we must fix the get_block-vs-truncate race 1107d444c3c3STheodore Ts'o * by other means, so we have i_data_sem. 1108d444c3c3STheodore Ts'o */ 1109d444c3c3STheodore Ts'o struct rw_semaphore i_data_sem; 1110d444c3c3STheodore Ts'o struct inode vfs_inode; 11118aefcd55STheodore Ts'o struct jbd2_inode *jinode; 1112d444c3c3STheodore Ts'o 1113202ee5dfSTheodore Ts'o spinlock_t i_raw_lock; /* protects updates to the raw inode */ 1114202ee5dfSTheodore Ts'o 1115d444c3c3STheodore Ts'o /* 1116d444c3c3STheodore Ts'o * File creation time. Its function is same as that of 11177b62b293SArnd Bergmann * struct timespec64 i_{a,c,m}time in the generic inode. 1118d444c3c3STheodore Ts'o */ 11197b62b293SArnd Bergmann struct timespec64 i_crtime; 1120d444c3c3STheodore Ts'o 1121d444c3c3STheodore Ts'o /* mballoc */ 112227bc446eSbrookxu atomic_t i_prealloc_active; 1123d444c3c3STheodore Ts'o struct list_head i_prealloc_list; 1124d444c3c3STheodore Ts'o spinlock_t i_prealloc_lock; 1125d444c3c3STheodore Ts'o 1126c0677e6dSZheng Liu /* extents status tree */ 1127c0677e6dSZheng Liu struct ext4_es_tree i_es_tree; 1128c0677e6dSZheng Liu rwlock_t i_es_lock; 1129edaa53caSZheng Liu struct list_head i_es_list; 1130eb68d0e2SZheng Liu unsigned int i_es_all_nr; /* protected by i_es_lock */ 1131edaa53caSZheng Liu unsigned int i_es_shk_nr; /* protected by i_es_lock */ 1132dd475925SJan Kara ext4_lblk_t i_es_shrink_lblk; /* Offset where we start searching for 1133dd475925SJan Kara extents to shrink. Protected by 1134dd475925SJan Kara i_es_lock */ 1135c0677e6dSZheng Liu 1136d444c3c3STheodore Ts'o /* ialloc */ 1137d444c3c3STheodore Ts'o ext4_group_t i_last_alloc_group; 1138d444c3c3STheodore Ts'o 1139d444c3c3STheodore Ts'o /* allocation reservation info for delalloc */ 1140a627b0a7SEric Whitney /* In case of bigalloc, this refer to clusters rather than blocks */ 1141d444c3c3STheodore Ts'o unsigned int i_reserved_data_blocks; 1142d444c3c3STheodore Ts'o 11431dc0aa46SEric Whitney /* pending cluster reservations for bigalloc file systems */ 11441dc0aa46SEric Whitney struct ext4_pending_tree i_pending_tree; 11451dc0aa46SEric Whitney 1146d444c3c3STheodore Ts'o /* on-disk additional length */ 1147d444c3c3STheodore Ts'o __u16 i_extra_isize; 1148d444c3c3STheodore Ts'o 114967cf5b09STao Ma /* Indicate the inline data space. */ 115067cf5b09STao Ma u16 i_inline_off; 115167cf5b09STao Ma u16 i_inline_size; 115267cf5b09STao Ma 1153a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1154a9e7f447SDmitry Monakhov /* quota space reservation, managed internally by quota code */ 1155a9e7f447SDmitry Monakhov qsize_t i_reserved_quota; 1156a9e7f447SDmitry Monakhov #endif 11578d5d02e6SMingming Cao 11582e8fa54eSJan Kara /* Lock protecting lists below */ 1159744692dcSJiaying Zhang spinlock_t i_completed_io_lock; 11602e8fa54eSJan Kara /* 11612e8fa54eSJan Kara * Completed IOs that need unwritten extents handling and have 11622e8fa54eSJan Kara * transaction reserved 11632e8fa54eSJan Kara */ 11642e8fa54eSJan Kara struct list_head i_rsv_conversion_list; 11652e8fa54eSJan Kara struct work_struct i_rsv_conversion_work; 1166600be30aSJan Kara atomic_t i_unwritten; /* Nr. of inflight conversions pending */ 11678a2005d3STheodore Ts'o 11688a2005d3STheodore Ts'o spinlock_t i_block_reservation_lock; 1169b436b9beSJan Kara 1170b436b9beSJan Kara /* 1171b436b9beSJan Kara * Transactions that contain inode's metadata needed to complete 1172b436b9beSJan Kara * fsync and fdatasync, respectively. 1173b436b9beSJan Kara */ 1174b436b9beSJan Kara tid_t i_sync_tid; 1175b436b9beSJan Kara tid_t i_datasync_tid; 1176814525f4SDarrick J. Wong 117796c7e0d9SJan Kara #ifdef CONFIG_QUOTA 117896c7e0d9SJan Kara struct dquot *i_dquot[MAXQUOTAS]; 117996c7e0d9SJan Kara #endif 118096c7e0d9SJan Kara 1181814525f4SDarrick J. Wong /* Precomputed uuid+inum+igen checksum for seeding inode checksums */ 1182814525f4SDarrick J. Wong __u32 i_csum_seed; 1183b30ab0e0SMichael Halcrow 1184040cb378SLi Xi kprojid_t i_projid; 1185d444c3c3STheodore Ts'o }; 1186d444c3c3STheodore Ts'o 1187d444c3c3STheodore Ts'o /* 11883dcf5451SChristoph Hellwig * File system states 11893dcf5451SChristoph Hellwig */ 11903dcf5451SChristoph Hellwig #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ 11913dcf5451SChristoph Hellwig #define EXT4_ERROR_FS 0x0002 /* Errors detected */ 11923dcf5451SChristoph Hellwig #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ 11938016e29fSHarshad Shirwadkar #define EXT4_FC_REPLAY 0x0020 /* Fast commit replay ongoing */ 11943dcf5451SChristoph Hellwig 11953dcf5451SChristoph Hellwig /* 11963dcf5451SChristoph Hellwig * Misc. filesystem flags 11973dcf5451SChristoph Hellwig */ 11983dcf5451SChristoph Hellwig #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ 11993dcf5451SChristoph Hellwig #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ 12003dcf5451SChristoph Hellwig #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ 12013dcf5451SChristoph Hellwig 12023dcf5451SChristoph Hellwig /* 120368911009SLukas Czerner * Mount flags set via mount options or defaults 12043dcf5451SChristoph Hellwig */ 1205cdb7ee4cSTahsin Erdogan #define EXT4_MOUNT_NO_MBCACHE 0x00001 /* Do not use mbcache */ 12063dcf5451SChristoph Hellwig #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ 12073dcf5451SChristoph Hellwig #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ 12083dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ 12093dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ 12103dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ 121139ef17f1STheodore Ts'o #define EXT4_MOUNT_ERRORS_MASK 0x00070 12123dcf5451SChristoph Hellwig #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ 12133dcf5451SChristoph Hellwig #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ 1214923ae0ffSRoss Zwisler #ifdef CONFIG_FS_DAX 1215fc626fe3SIra Weiny #define EXT4_MOUNT_DAX_ALWAYS 0x00200 /* Direct Access */ 1216923ae0ffSRoss Zwisler #else 1217fc626fe3SIra Weiny #define EXT4_MOUNT_DAX_ALWAYS 0 1218923ae0ffSRoss Zwisler #endif 12193dcf5451SChristoph Hellwig #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ 12203dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ 12213dcf5451SChristoph Hellwig #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ 12223dcf5451SChristoph Hellwig #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ 12233dcf5451SChristoph Hellwig #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ 12243dcf5451SChristoph Hellwig #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ 12253dcf5451SChristoph Hellwig #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ 12263dcf5451SChristoph Hellwig #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ 1227afd4672dSTheodore Ts'o #define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000 /* No auto delalloc mapping */ 12283dcf5451SChristoph Hellwig #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ 122949da9392SJan Kara #define EXT4_MOUNT_QUOTA 0x40000 /* Some quota option set */ 123049da9392SJan Kara #define EXT4_MOUNT_USRQUOTA 0x80000 /* "old" user quota, 123149da9392SJan Kara * enable enforcement for hidden 123249da9392SJan Kara * quota files */ 123349da9392SJan Kara #define EXT4_MOUNT_GRPQUOTA 0x100000 /* "old" group quota, enable 123449da9392SJan Kara * enforcement for hidden quota 123549da9392SJan Kara * files */ 123649da9392SJan Kara #define EXT4_MOUNT_PRJQUOTA 0x200000 /* Enable project quota 123749da9392SJan Kara * enforcement */ 1238744692dcSJiaying Zhang #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */ 1239d4da6c9cSLinus Torvalds #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ 12403dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ 1241327eaf73STheodore Ts'o #define EXT4_MOUNT_WARN_ON_ERROR 0x2000000 /* Trigger WARN_ON on error */ 124221175ca4SHarshad Shirwadkar #define EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS 0x4000000 124364769240SAlex Tomas #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ 12445bf5683aSHidehiro Kawai #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ 12456fd058f7STheodore Ts'o #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ 12465328e635SEric Sandeen #define EXT4_MOUNT_DISCARD 0x40000000 /* Issue DISCARD requests */ 1247bfff6873SLukas Czerner #define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000 /* Initialize uninitialized itables */ 12485bf5683aSHidehiro Kawai 124968911009SLukas Czerner /* 125068911009SLukas Czerner * Mount flags set either automatically (could not be set by mount option) 125168911009SLukas Czerner * based on per file system feature or property or in special cases such as 125268911009SLukas Czerner * distinguishing between explicit mount option definition and default. 125368911009SLukas Czerner */ 125456889787STheodore Ts'o #define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001 /* User explicitly 125556889787STheodore Ts'o specified delalloc */ 125668911009SLukas Czerner #define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002 /* We have standard group 125768911009SLukas Czerner size of blocksize * 8 125868911009SLukas Czerner blocks */ 1259ed3654ebSTheodore Ts'o #define EXT4_MOUNT2_HURD_COMPAT 0x00000004 /* Support HURD-castrated 1260ed3654ebSTheodore Ts'o file systems */ 12611e381f60SDmitry Monakhov #define EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM 0x00000008 /* User explicitly 12621e381f60SDmitry Monakhov specified journal checksum */ 12631e381f60SDmitry Monakhov 1264995a3ed6SHarshad Shirwadkar #define EXT4_MOUNT2_JOURNAL_FAST_COMMIT 0x00000010 /* Journal fast commit */ 1265a72b38eeSHarshad Shirwadkar #define EXT4_MOUNT2_DAX_NEVER 0x00000020 /* Do not allow Direct Access */ 1266a72b38eeSHarshad Shirwadkar #define EXT4_MOUNT2_DAX_INODE 0x00000040 /* For printing options only */ 1267196e402aSHarshad Shirwadkar #define EXT4_MOUNT2_MB_OPTIMIZE_SCAN 0x00000080 /* Optimize group 1268196e402aSHarshad Shirwadkar * scanning in mballoc 1269196e402aSHarshad Shirwadkar */ 1270995a3ed6SHarshad Shirwadkar 1271fd8c37ecSTheodore Ts'o #define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \ 1272fd8c37ecSTheodore Ts'o ~EXT4_MOUNT_##opt 1273fd8c37ecSTheodore Ts'o #define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \ 1274fd8c37ecSTheodore Ts'o EXT4_MOUNT_##opt 12753dcf5451SChristoph Hellwig #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ 12763dcf5451SChristoph Hellwig EXT4_MOUNT_##opt) 12773dcf5451SChristoph Hellwig 1278a2595b8aSTheodore Ts'o #define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \ 1279a2595b8aSTheodore Ts'o ~EXT4_MOUNT2_##opt 1280a2595b8aSTheodore Ts'o #define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \ 1281a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt 1282a2595b8aSTheodore Ts'o #define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \ 1283a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt) 1284a2595b8aSTheodore Ts'o 1285597d508cSAkinobu Mita #define ext4_test_and_set_bit __test_and_set_bit_le 1286597d508cSAkinobu Mita #define ext4_set_bit __set_bit_le 12873dcf5451SChristoph Hellwig #define ext4_set_bit_atomic ext2_set_bit_atomic 1288597d508cSAkinobu Mita #define ext4_test_and_clear_bit __test_and_clear_bit_le 1289597d508cSAkinobu Mita #define ext4_clear_bit __clear_bit_le 12903dcf5451SChristoph Hellwig #define ext4_clear_bit_atomic ext2_clear_bit_atomic 129150e0168cSAkinobu Mita #define ext4_test_bit test_bit_le 129250e0168cSAkinobu Mita #define ext4_find_next_zero_bit find_next_zero_bit_le 129350e0168cSAkinobu Mita #define ext4_find_next_bit find_next_bit_le 12943dcf5451SChristoph Hellwig 1295123e3016SRitesh Harjani extern void mb_set_bits(void *bm, int cur, int len); 1296c3e94d1dSYongqiang Yang 12973dcf5451SChristoph Hellwig /* 12983dcf5451SChristoph Hellwig * Maximal mount counts between two filesystem checks 12993dcf5451SChristoph Hellwig */ 13003dcf5451SChristoph Hellwig #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ 13013dcf5451SChristoph Hellwig #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ 13023dcf5451SChristoph Hellwig 13033dcf5451SChristoph Hellwig /* 13043dcf5451SChristoph Hellwig * Behaviour when detecting errors 13053dcf5451SChristoph Hellwig */ 13063dcf5451SChristoph Hellwig #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ 13073dcf5451SChristoph Hellwig #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ 13083dcf5451SChristoph Hellwig #define EXT4_ERRORS_PANIC 3 /* Panic */ 13093dcf5451SChristoph Hellwig #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE 13103dcf5451SChristoph Hellwig 1311e6153918SDarrick J. Wong /* Metadata checksum algorithm codes */ 1312e6153918SDarrick J. Wong #define EXT4_CRC32C_CHKSUM 1 1313e6153918SDarrick J. Wong 1314bbc605cdSLukas Czerner #define EXT4_LABEL_MAX 16 1315bbc605cdSLukas Czerner 13163dcf5451SChristoph Hellwig /* 13173dcf5451SChristoph Hellwig * Structure of the super block 13183dcf5451SChristoph Hellwig */ 13193dcf5451SChristoph Hellwig struct ext4_super_block { 13203dcf5451SChristoph Hellwig /*00*/ __le32 s_inodes_count; /* Inodes count */ 13213dcf5451SChristoph Hellwig __le32 s_blocks_count_lo; /* Blocks count */ 13223dcf5451SChristoph Hellwig __le32 s_r_blocks_count_lo; /* Reserved blocks count */ 13233dcf5451SChristoph Hellwig __le32 s_free_blocks_count_lo; /* Free blocks count */ 13243dcf5451SChristoph Hellwig /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ 13253dcf5451SChristoph Hellwig __le32 s_first_data_block; /* First Data Block */ 13263dcf5451SChristoph Hellwig __le32 s_log_block_size; /* Block size */ 1327281b5995STheodore Ts'o __le32 s_log_cluster_size; /* Allocation cluster size */ 13283dcf5451SChristoph Hellwig /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ 1329281b5995STheodore Ts'o __le32 s_clusters_per_group; /* # Clusters per group */ 13303dcf5451SChristoph Hellwig __le32 s_inodes_per_group; /* # Inodes per group */ 13313dcf5451SChristoph Hellwig __le32 s_mtime; /* Mount time */ 13323dcf5451SChristoph Hellwig /*30*/ __le32 s_wtime; /* Write time */ 13333dcf5451SChristoph Hellwig __le16 s_mnt_count; /* Mount count */ 13343dcf5451SChristoph Hellwig __le16 s_max_mnt_count; /* Maximal mount count */ 13353dcf5451SChristoph Hellwig __le16 s_magic; /* Magic signature */ 13363dcf5451SChristoph Hellwig __le16 s_state; /* File system state */ 13373dcf5451SChristoph Hellwig __le16 s_errors; /* Behaviour when detecting errors */ 13383dcf5451SChristoph Hellwig __le16 s_minor_rev_level; /* minor revision level */ 13393dcf5451SChristoph Hellwig /*40*/ __le32 s_lastcheck; /* time of last check */ 13403dcf5451SChristoph Hellwig __le32 s_checkinterval; /* max. time between checks */ 13413dcf5451SChristoph Hellwig __le32 s_creator_os; /* OS */ 13423dcf5451SChristoph Hellwig __le32 s_rev_level; /* Revision level */ 13433dcf5451SChristoph Hellwig /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ 13443dcf5451SChristoph Hellwig __le16 s_def_resgid; /* Default gid for reserved blocks */ 13453dcf5451SChristoph Hellwig /* 13463dcf5451SChristoph Hellwig * These fields are for EXT4_DYNAMIC_REV superblocks only. 13473dcf5451SChristoph Hellwig * 13483dcf5451SChristoph Hellwig * Note: the difference between the compatible feature set and 13493dcf5451SChristoph Hellwig * the incompatible feature set is that if there is a bit set 13503dcf5451SChristoph Hellwig * in the incompatible feature set that the kernel doesn't 13513dcf5451SChristoph Hellwig * know about, it should refuse to mount the filesystem. 13523dcf5451SChristoph Hellwig * 13533dcf5451SChristoph Hellwig * e2fsck's requirements are more strict; if it doesn't know 13543dcf5451SChristoph Hellwig * about a feature in either the compatible or incompatible 13553dcf5451SChristoph Hellwig * feature set, it must abort and not try to meddle with 13563dcf5451SChristoph Hellwig * things it doesn't understand... 13573dcf5451SChristoph Hellwig */ 13583dcf5451SChristoph Hellwig __le32 s_first_ino; /* First non-reserved inode */ 13593dcf5451SChristoph Hellwig __le16 s_inode_size; /* size of inode structure */ 13603dcf5451SChristoph Hellwig __le16 s_block_group_nr; /* block group # of this superblock */ 13613dcf5451SChristoph Hellwig __le32 s_feature_compat; /* compatible feature set */ 13623dcf5451SChristoph Hellwig /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ 13633dcf5451SChristoph Hellwig __le32 s_feature_ro_compat; /* readonly-compatible feature set */ 13643dcf5451SChristoph Hellwig /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ 1365bbc605cdSLukas Czerner /*78*/ char s_volume_name[EXT4_LABEL_MAX]; /* volume name */ 1366072ebb3bSTheodore Ts'o /*88*/ char s_last_mounted[64] __nonstring; /* directory where last mounted */ 13673dcf5451SChristoph Hellwig /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ 13683dcf5451SChristoph Hellwig /* 13693dcf5451SChristoph Hellwig * Performance hints. Directory preallocation should only 13703dcf5451SChristoph Hellwig * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. 13713dcf5451SChristoph Hellwig */ 13723dcf5451SChristoph Hellwig __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 13733dcf5451SChristoph Hellwig __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 13743dcf5451SChristoph Hellwig __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ 13753dcf5451SChristoph Hellwig /* 13763dcf5451SChristoph Hellwig * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. 13773dcf5451SChristoph Hellwig */ 13783dcf5451SChristoph Hellwig /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 13793dcf5451SChristoph Hellwig /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ 13803dcf5451SChristoph Hellwig __le32 s_journal_dev; /* device number of journal file */ 13813dcf5451SChristoph Hellwig __le32 s_last_orphan; /* start of list of inodes to delete */ 13823dcf5451SChristoph Hellwig __le32 s_hash_seed[4]; /* HTREE hash seed */ 13833dcf5451SChristoph Hellwig __u8 s_def_hash_version; /* Default hash version to use */ 138489eeddf0STheodore Ts'o __u8 s_jnl_backup_type; 13853dcf5451SChristoph Hellwig __le16 s_desc_size; /* size of group descriptor */ 13863dcf5451SChristoph Hellwig /*100*/ __le32 s_default_mount_opts; 13873dcf5451SChristoph Hellwig __le32 s_first_meta_bg; /* First metablock block group */ 13883dcf5451SChristoph Hellwig __le32 s_mkfs_time; /* When the filesystem was created */ 13893dcf5451SChristoph Hellwig __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ 13903dcf5451SChristoph Hellwig /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ 13913dcf5451SChristoph Hellwig /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ 13923dcf5451SChristoph Hellwig __le32 s_r_blocks_count_hi; /* Reserved blocks count */ 13933dcf5451SChristoph Hellwig __le32 s_free_blocks_count_hi; /* Free blocks count */ 13943dcf5451SChristoph Hellwig __le16 s_min_extra_isize; /* All inodes have at least # bytes */ 13953dcf5451SChristoph Hellwig __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ 13963dcf5451SChristoph Hellwig __le32 s_flags; /* Miscellaneous flags */ 13973dcf5451SChristoph Hellwig __le16 s_raid_stride; /* RAID stride */ 1398c5e06d10SJohann Lombardi __le16 s_mmp_update_interval; /* # seconds to wait in MMP checking */ 13993dcf5451SChristoph Hellwig __le64 s_mmp_block; /* Block for multi-mount protection */ 14003dcf5451SChristoph Hellwig __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ 1401772cb7c8SJose R. Santos __u8 s_log_groups_per_flex; /* FLEX_BG group size */ 1402e6153918SDarrick J. Wong __u8 s_checksum_type; /* metadata checksum algorithm used */ 1403f542fbe8STheodore Ts'o __u8 s_encryption_level; /* versioning level for encryption */ 1404f542fbe8STheodore Ts'o __u8 s_reserved_pad; /* Padding to next 32bits */ 1405afc32f7eSTheodore Ts'o __le64 s_kbytes_written; /* nr of lifetime kilobytes written */ 14064a9cdec7STheodore Ts'o __le32 s_snapshot_inum; /* Inode number of active snapshot */ 14074a9cdec7STheodore Ts'o __le32 s_snapshot_id; /* sequential ID of active snapshot */ 14084a9cdec7STheodore Ts'o __le64 s_snapshot_r_blocks_count; /* reserved blocks for active 14094a9cdec7STheodore Ts'o snapshot's future use */ 14104a9cdec7STheodore Ts'o __le32 s_snapshot_list; /* inode number of the head of the 14114a9cdec7STheodore Ts'o on-disk snapshot list */ 14121c13d5c0STheodore Ts'o #define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count) 14131c13d5c0STheodore Ts'o __le32 s_error_count; /* number of fs errors */ 14141c13d5c0STheodore Ts'o __le32 s_first_error_time; /* first time an error happened */ 14151c13d5c0STheodore Ts'o __le32 s_first_error_ino; /* inode involved in first error */ 14161c13d5c0STheodore Ts'o __le64 s_first_error_block; /* block involved of first error */ 1417072ebb3bSTheodore Ts'o __u8 s_first_error_func[32] __nonstring; /* function where the error happened */ 14181c13d5c0STheodore Ts'o __le32 s_first_error_line; /* line number where error happened */ 14191c13d5c0STheodore Ts'o __le32 s_last_error_time; /* most recent time of an error */ 14201c13d5c0STheodore Ts'o __le32 s_last_error_ino; /* inode involved in last error */ 14211c13d5c0STheodore Ts'o __le32 s_last_error_line; /* line number where error happened */ 14221c13d5c0STheodore Ts'o __le64 s_last_error_block; /* block involved of last error */ 1423072ebb3bSTheodore Ts'o __u8 s_last_error_func[32] __nonstring; /* function where the error happened */ 14248b67f04aSTheodore Ts'o #define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts) 14258b67f04aSTheodore Ts'o __u8 s_mount_opts[64]; 1426281b5995STheodore Ts'o __le32 s_usr_quota_inum; /* inode for tracking user quota */ 1427281b5995STheodore Ts'o __le32 s_grp_quota_inum; /* inode for tracking group quota */ 1428281b5995STheodore Ts'o __le32 s_overhead_clusters; /* overhead blocks/clusters in fs */ 14291beeef1bSDarrick J. Wong __le32 s_backup_bgs[2]; /* groups with sparse_super2 SBs */ 14303edc18d8STheodore Ts'o __u8 s_encrypt_algos[4]; /* Encryption algorithms in use */ 1431f542fbe8STheodore Ts'o __u8 s_encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ 1432f542fbe8STheodore Ts'o __le32 s_lpf_ino; /* Location of the lost+found inode */ 14338b4953e1STheodore Ts'o __le32 s_prj_quota_inum; /* inode for tracking project quota */ 14348c81bd8fSDarrick J. Wong __le32 s_checksum_seed; /* crc32c(uuid) if csum_seed set */ 14356a0678a7SArnd Bergmann __u8 s_wtime_hi; 14366a0678a7SArnd Bergmann __u8 s_mtime_hi; 14376a0678a7SArnd Bergmann __u8 s_mkfs_time_hi; 14386a0678a7SArnd Bergmann __u8 s_lastcheck_hi; 14396a0678a7SArnd Bergmann __u8 s_first_error_time_hi; 14406a0678a7SArnd Bergmann __u8 s_last_error_time_hi; 1441878520acSTheodore Ts'o __u8 s_first_error_errcode; 1442878520acSTheodore Ts'o __u8 s_last_error_errcode; 1443c83ad55eSGabriel Krisman Bertazi __le16 s_encoding; /* Filename charset encoding */ 1444c83ad55eSGabriel Krisman Bertazi __le16 s_encoding_flags; /* Filename charset encoding flags */ 144502f310fcSJan Kara __le32 s_orphan_file_inum; /* Inode for tracking orphan inodes */ 144602f310fcSJan Kara __le32 s_reserved[94]; /* Padding to the end of the block */ 1447e6153918SDarrick J. Wong __le32 s_checksum; /* crc32c(superblock) */ 14483dcf5451SChristoph Hellwig }; 14493dcf5451SChristoph Hellwig 14501c13d5c0STheodore Ts'o #define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START) 14511c13d5c0STheodore Ts'o 14523dcf5451SChristoph Hellwig #ifdef __KERNEL__ 1453bc0b0d6dSTheodore Ts'o 1454a2d4a646SJan Kara /* Number of quota types we support */ 1455689c958cSLi Xi #define EXT4_MAXQUOTAS 3 1456a2d4a646SJan Kara 1457c83ad55eSGabriel Krisman Bertazi #define EXT4_ENC_UTF8_12_1 1 1458c83ad55eSGabriel Krisman Bertazi 1459188c299eSJan Kara /* Types of ext4 journal triggers */ 1460188c299eSJan Kara enum ext4_journal_trigger_type { 146102f310fcSJan Kara EXT4_JTR_ORPHAN_FILE, 1462188c299eSJan Kara EXT4_JTR_NONE /* This must be the last entry for indexing to work! */ 1463188c299eSJan Kara }; 1464188c299eSJan Kara 1465188c299eSJan Kara #define EXT4_JOURNAL_TRIGGER_COUNT EXT4_JTR_NONE 1466188c299eSJan Kara 1467188c299eSJan Kara struct ext4_journal_trigger { 1468188c299eSJan Kara struct jbd2_buffer_trigger_type tr_triggers; 1469188c299eSJan Kara struct super_block *sb; 1470188c299eSJan Kara }; 1471188c299eSJan Kara 1472188c299eSJan Kara static inline struct ext4_journal_trigger *EXT4_TRIGGER( 1473188c299eSJan Kara struct jbd2_buffer_trigger_type *trigger) 1474188c299eSJan Kara { 1475188c299eSJan Kara return container_of(trigger, struct ext4_journal_trigger, tr_triggers); 1476188c299eSJan Kara } 1477188c299eSJan Kara 147802f310fcSJan Kara #define EXT4_ORPHAN_BLOCK_MAGIC 0x0b10ca04 147902f310fcSJan Kara 148002f310fcSJan Kara /* Structure at the tail of orphan block */ 148102f310fcSJan Kara struct ext4_orphan_block_tail { 148202f310fcSJan Kara __le32 ob_magic; 148302f310fcSJan Kara __le32 ob_checksum; 148402f310fcSJan Kara }; 148502f310fcSJan Kara 148602f310fcSJan Kara static inline int ext4_inodes_per_orphan_block(struct super_block *sb) 148702f310fcSJan Kara { 148802f310fcSJan Kara return (sb->s_blocksize - sizeof(struct ext4_orphan_block_tail)) / 148902f310fcSJan Kara sizeof(u32); 149002f310fcSJan Kara } 149102f310fcSJan Kara 149202f310fcSJan Kara struct ext4_orphan_block { 14934a79a98cSJan Kara atomic_t ob_free_entries; /* Number of free orphan entries in block */ 149402f310fcSJan Kara struct buffer_head *ob_bh; /* Buffer for orphan block */ 149502f310fcSJan Kara }; 149602f310fcSJan Kara 149702f310fcSJan Kara /* 149802f310fcSJan Kara * Info about orphan file. 149902f310fcSJan Kara */ 150002f310fcSJan Kara struct ext4_orphan_info { 150102f310fcSJan Kara int of_blocks; /* Number of orphan blocks in a file */ 150202f310fcSJan Kara __u32 of_csum_seed; /* Checksum seed for orphan file */ 150302f310fcSJan Kara struct ext4_orphan_block *of_binfo; /* Array with info about orphan 150402f310fcSJan Kara * file blocks */ 150502f310fcSJan Kara }; 150602f310fcSJan Kara 1507c83ad55eSGabriel Krisman Bertazi /* 1508ca0faba0STheodore Ts'o * fourth extended-fs super-block data in memory 1509ca0faba0STheodore Ts'o */ 1510ca0faba0STheodore Ts'o struct ext4_sb_info { 1511ca0faba0STheodore Ts'o unsigned long s_desc_size; /* Size of a group descriptor in bytes */ 1512ca0faba0STheodore Ts'o unsigned long s_inodes_per_block;/* Number of inodes per block */ 1513ca0faba0STheodore Ts'o unsigned long s_blocks_per_group;/* Number of blocks in a group */ 1514281b5995STheodore Ts'o unsigned long s_clusters_per_group; /* Number of clusters in a group */ 1515ca0faba0STheodore Ts'o unsigned long s_inodes_per_group;/* Number of inodes in a group */ 1516ca0faba0STheodore Ts'o unsigned long s_itb_per_group; /* Number of inode table blocks per group */ 1517ca0faba0STheodore Ts'o unsigned long s_gdb_count; /* Number of group descriptor blocks */ 1518ca0faba0STheodore Ts'o unsigned long s_desc_per_block; /* Number of group descriptors per block */ 1519ca0faba0STheodore Ts'o ext4_group_t s_groups_count; /* Number of groups in the fs */ 1520fb0a387dSEric Sandeen ext4_group_t s_blockfile_groups;/* Groups acceptable for non-extent files */ 1521952fc18eSTheodore Ts'o unsigned long s_overhead; /* # of fs overhead clusters */ 1522281b5995STheodore Ts'o unsigned int s_cluster_ratio; /* Number of blocks per cluster */ 1523281b5995STheodore Ts'o unsigned int s_cluster_bits; /* log2 of s_cluster_ratio */ 1524ca0faba0STheodore Ts'o loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ 1525ca0faba0STheodore Ts'o struct buffer_head * s_sbh; /* Buffer containing the super block */ 1526ca0faba0STheodore Ts'o struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ 15271d0c3924STheodore Ts'o struct buffer_head * __rcu *s_group_desc; 15287f4520ccSTheodore Ts'o unsigned int s_mount_opt; 1529a2595b8aSTheodore Ts'o unsigned int s_mount_opt2; 15309b5f6c9bSHarshad Shirwadkar unsigned long s_mount_flags; 15315a916be1STheodore Ts'o unsigned int s_def_mount_opt; 1532ca0faba0STheodore Ts'o ext4_fsblk_t s_sb_block; 153327dd4385SLukas Czerner atomic64_t s_resv_clusters; 153408cefc7aSEric W. Biederman kuid_t s_resuid; 153508cefc7aSEric W. Biederman kgid_t s_resgid; 1536ca0faba0STheodore Ts'o unsigned short s_mount_state; 1537ca0faba0STheodore Ts'o unsigned short s_pad; 1538ca0faba0STheodore Ts'o int s_addr_per_block_bits; 1539ca0faba0STheodore Ts'o int s_desc_per_block_bits; 1540ca0faba0STheodore Ts'o int s_inode_size; 1541ca0faba0STheodore Ts'o int s_first_ino; 1542ca0faba0STheodore Ts'o unsigned int s_inode_readahead_blks; 154311013911SAndreas Dilger unsigned int s_inode_goal; 1544ca0faba0STheodore Ts'o u32 s_hash_seed[4]; 1545ca0faba0STheodore Ts'o int s_def_hash_version; 15466d2424a8SEric Biggers int s_hash_unsigned; /* 3 if hash should be unsigned, 0 if not */ 154757042651STheodore Ts'o struct percpu_counter s_freeclusters_counter; 1548ca0faba0STheodore Ts'o struct percpu_counter s_freeinodes_counter; 1549ca0faba0STheodore Ts'o struct percpu_counter s_dirs_counter; 155057042651STheodore Ts'o struct percpu_counter s_dirtyclusters_counter; 1551efc61345SEric Whitney struct percpu_counter s_sra_exceeded_retry_limit; 1552ca0faba0STheodore Ts'o struct blockgroup_lock *s_blockgroup_lock; 1553ca0faba0STheodore Ts'o struct proc_dir_entry *s_proc; 1554ca0faba0STheodore Ts'o struct kobject s_kobj; 1555ca0faba0STheodore Ts'o struct completion s_kobj_unregister; 15562c0544b2STheodore Ts'o struct super_block *s_sb; 1557618f0031SPavel Skripkin struct buffer_head *s_mmp_bh; 1558ca0faba0STheodore Ts'o 1559ca0faba0STheodore Ts'o /* Journaling */ 1560ca0faba0STheodore Ts'o struct journal_s *s_journal; 15619549a168STheodore Ts'o unsigned long s_ext4_flags; /* Ext4 superblock flags */ 156202f310fcSJan Kara struct mutex s_orphan_lock; /* Protects on disk list changes */ 156302f310fcSJan Kara struct list_head s_orphan; /* List of orphaned inodes in on disk 156402f310fcSJan Kara list */ 156502f310fcSJan Kara struct ext4_orphan_info s_orphan_info; 1566ca0faba0STheodore Ts'o unsigned long s_commit_interval; 1567ca0faba0STheodore Ts'o u32 s_max_batch_time; 1568ca0faba0STheodore Ts'o u32 s_min_batch_time; 1569ee7ed3aaSChunguang Xu struct block_device *s_journal_bdev; 1570ca0faba0STheodore Ts'o #ifdef CONFIG_QUOTA 157133458eabSTheodore Ts'o /* Names of quota files with journalled quota */ 157233458eabSTheodore Ts'o char __rcu *s_qf_names[EXT4_MAXQUOTAS]; 1573ca0faba0STheodore Ts'o int s_jquota_fmt; /* Format of quota to use */ 1574ca0faba0STheodore Ts'o #endif 1575ca0faba0STheodore Ts'o unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ 1576dd0db94fSChunguang Xu struct ext4_system_blocks __rcu *s_system_blks; 1577ca0faba0STheodore Ts'o 1578ca0faba0STheodore Ts'o #ifdef EXTENTS_STATS 1579ca0faba0STheodore Ts'o /* ext4 extents stats */ 1580ca0faba0STheodore Ts'o unsigned long s_ext_min; 1581ca0faba0STheodore Ts'o unsigned long s_ext_max; 1582ca0faba0STheodore Ts'o unsigned long s_depth_max; 1583ca0faba0STheodore Ts'o spinlock_t s_ext_stats_lock; 1584ca0faba0STheodore Ts'o unsigned long s_ext_blocks; 1585ca0faba0STheodore Ts'o unsigned long s_ext_extents; 1586ca0faba0STheodore Ts'o #endif 1587ca0faba0STheodore Ts'o 1588ca0faba0STheodore Ts'o /* for buddy allocator */ 1589df3da4eaSSuraj Jitindar Singh struct ext4_group_info ** __rcu *s_group_info; 1590ca0faba0STheodore Ts'o struct inode *s_buddy_cache; 1591ca0faba0STheodore Ts'o spinlock_t s_md_lock; 1592ca0faba0STheodore Ts'o unsigned short *s_mb_offsets; 1593ca0faba0STheodore Ts'o unsigned int *s_mb_maxs; 159428623c2fSTheodore Ts'o unsigned int s_group_info_size; 1595d08854f5STheodore Ts'o unsigned int s_mb_free_pending; 1596a0154344SDaeho Jeong struct list_head s_freed_data_list; /* List of blocks to be freed 1597a0154344SDaeho Jeong after commit completed */ 159855cdd0afSWang Jianchao struct list_head s_discard_list; 159955cdd0afSWang Jianchao struct work_struct s_discard_work; 16005036ab8dSWang Jianchao atomic_t s_retry_alloc_pending; 160183e80a6eSJan Kara struct list_head *s_mb_avg_fragment_size; 160283e80a6eSJan Kara rwlock_t *s_mb_avg_fragment_size_locks; 1603196e402aSHarshad Shirwadkar struct list_head *s_mb_largest_free_orders; 1604196e402aSHarshad Shirwadkar rwlock_t *s_mb_largest_free_orders_locks; 1605ca0faba0STheodore Ts'o 1606ca0faba0STheodore Ts'o /* tunables */ 1607ca0faba0STheodore Ts'o unsigned long s_stripe; 1608196e402aSHarshad Shirwadkar unsigned int s_mb_max_linear_groups; 1609ca0faba0STheodore Ts'o unsigned int s_mb_stream_request; 1610ca0faba0STheodore Ts'o unsigned int s_mb_max_to_scan; 1611ca0faba0STheodore Ts'o unsigned int s_mb_min_to_scan; 1612ca0faba0STheodore Ts'o unsigned int s_mb_stats; 1613ca0faba0STheodore Ts'o unsigned int s_mb_order2_reqs; 1614ca0faba0STheodore Ts'o unsigned int s_mb_group_prealloc; 161527bc446eSbrookxu unsigned int s_mb_max_inode_prealloc; 1616df981d03STheodore Ts'o unsigned int s_max_dir_size_kb; 1617ca0faba0STheodore Ts'o /* where last allocation was done - for stream allocation */ 1618ca0faba0STheodore Ts'o unsigned long s_mb_last_group; 1619ca0faba0STheodore Ts'o unsigned long s_mb_last_start; 1620cfd73237SAlex Zhuravlev unsigned int s_mb_prefetch; 1621cfd73237SAlex Zhuravlev unsigned int s_mb_prefetch_limit; 1622ca0faba0STheodore Ts'o 1623ca0faba0STheodore Ts'o /* stats for buddy allocator */ 1624ca0faba0STheodore Ts'o atomic_t s_bal_reqs; /* number of reqs with len > 1 */ 1625ca0faba0STheodore Ts'o atomic_t s_bal_success; /* we found long enough chunks */ 1626ca0faba0STheodore Ts'o atomic_t s_bal_allocated; /* in blocks */ 1627ca0faba0STheodore Ts'o atomic_t s_bal_ex_scanned; /* total extents scanned */ 1628a6c75eafSHarshad Shirwadkar atomic_t s_bal_groups_scanned; /* number of groups scanned */ 1629ca0faba0STheodore Ts'o atomic_t s_bal_goals; /* goal hits */ 1630ca0faba0STheodore Ts'o atomic_t s_bal_breaks; /* too long searches */ 1631ca0faba0STheodore Ts'o atomic_t s_bal_2orders; /* 2^order hits */ 1632196e402aSHarshad Shirwadkar atomic_t s_bal_cr0_bad_suggestions; 1633196e402aSHarshad Shirwadkar atomic_t s_bal_cr1_bad_suggestions; 1634a6c75eafSHarshad Shirwadkar atomic64_t s_bal_cX_groups_considered[4]; 1635a6c75eafSHarshad Shirwadkar atomic64_t s_bal_cX_hits[4]; 1636a6c75eafSHarshad Shirwadkar atomic64_t s_bal_cX_failed[4]; /* cX loop didn't find blocks */ 163767d25186SHarshad Shirwadkar atomic_t s_mb_buddies_generated; /* number of buddies generated */ 163867d25186SHarshad Shirwadkar atomic64_t s_mb_generation_time; 1639ca0faba0STheodore Ts'o atomic_t s_mb_lost_chunks; 1640ca0faba0STheodore Ts'o atomic_t s_mb_preallocated; 1641ca0faba0STheodore Ts'o atomic_t s_mb_discarded; 164250797481STheodore Ts'o atomic_t s_lock_busy; 1643ca0faba0STheodore Ts'o 1644ca0faba0STheodore Ts'o /* locality groups */ 1645003cb608STejun Heo struct ext4_locality_group __percpu *s_locality_groups; 1646ca0faba0STheodore Ts'o 1647ca0faba0STheodore Ts'o /* for write statistics */ 1648ca0faba0STheodore Ts'o unsigned long s_sectors_written_start; 1649ca0faba0STheodore Ts'o u64 s_kbytes_written; 1650ca0faba0STheodore Ts'o 165167a5da56SZheng Liu /* the size of zero-out chunk */ 165267a5da56SZheng Liu unsigned int s_extent_max_zeroout_kb; 165367a5da56SZheng Liu 1654ca0faba0STheodore Ts'o unsigned int s_log_groups_per_flex; 16557c990728SSuraj Jitindar Singh struct flex_groups * __rcu *s_flex_groups; 1656117fff10STheodore Ts'o ext4_group_t s_flex_groups_allocated; 16574c0425ffSMingming Cao 16582e8fa54eSJan Kara /* workqueue for reserved extent conversions (buffered io) */ 16592e8fa54eSJan Kara struct workqueue_struct *rsv_conversion_wq; 166066e61a9eSTheodore Ts'o 166166e61a9eSTheodore Ts'o /* timer for periodic error stats printing */ 166266e61a9eSTheodore Ts'o struct timer_list s_err_report; 1663bfff6873SLukas Czerner 1664bfff6873SLukas Czerner /* Lazy inode table initialization info */ 1665bfff6873SLukas Czerner struct ext4_li_request *s_li_request; 1666bfff6873SLukas Czerner /* Wait multiplier for lazy initialization thread */ 1667bfff6873SLukas Czerner unsigned int s_li_wait_mult; 1668c5e06d10SJohann Lombardi 1669c5e06d10SJohann Lombardi /* Kernel thread for multiple mount protection */ 1670c5e06d10SJohann Lombardi struct task_struct *s_mmp_tsk; 16713d56b8d2STao Ma 16723d56b8d2STao Ma /* record the last minlen when FITRIM is called. */ 16732327fb2eSLukas Czerner unsigned long s_last_trim_minblks; 16740441984aSDarrick J. Wong 16750441984aSDarrick J. Wong /* Reference to checksum algorithm driver via cryptoapi */ 16760441984aSDarrick J. Wong struct crypto_shash *s_chksum_driver; 1677a9c47317SDarrick J. Wong 1678a9c47317SDarrick J. Wong /* Precomputed FS UUID checksum for seeding other checksums */ 1679a9c47317SDarrick J. Wong __u32 s_csum_seed; 168074cd15cdSZheng Liu 168174cd15cdSZheng Liu /* Reclaim extents from extent status tree */ 168274cd15cdSZheng Liu struct shrinker s_es_shrinker; 1683dd475925SJan Kara struct list_head s_es_list; /* List of inodes with reclaimable extents */ 1684edaa53caSZheng Liu long s_es_nr_inode; 1685eb68d0e2SZheng Liu struct ext4_es_stats s_es_stats; 168647387409STahsin Erdogan struct mb_cache *s_ea_block_cache; 1687dec214d0STahsin Erdogan struct mb_cache *s_ea_inode_cache; 1688edaa53caSZheng Liu spinlock_t s_es_lock ____cacheline_aligned_in_smp; 1689efbed4dcSTheodore Ts'o 1690188c299eSJan Kara /* Journal triggers for checksum computation */ 1691188c299eSJan Kara struct ext4_journal_trigger s_journal_triggers[EXT4_JOURNAL_TRIGGER_COUNT]; 1692188c299eSJan Kara 1693efbed4dcSTheodore Ts'o /* Ratelimit ext4 messages. */ 1694efbed4dcSTheodore Ts'o struct ratelimit_state s_err_ratelimit_state; 1695efbed4dcSTheodore Ts'o struct ratelimit_state s_warning_ratelimit_state; 1696efbed4dcSTheodore Ts'o struct ratelimit_state s_msg_ratelimit_state; 16971cf006edSDmitry Monakhov atomic_t s_warning_count; 16981cf006edSDmitry Monakhov atomic_t s_msg_count; 1699c8585c6fSDaeho Jeong 1700ac4acb1fSEric Biggers /* Encryption policy for '-o test_dummy_encryption' */ 1701ac4acb1fSEric Biggers struct fscrypt_dummy_policy s_dummy_enc_policy; 1702ed318a6cSEric Biggers 1703cb85f4d2SEric Biggers /* 1704cb85f4d2SEric Biggers * Barrier between writepages ops and changing any inode's JOURNAL_DATA 1705cb85f4d2SEric Biggers * or EXTENTS flag. 1706cb85f4d2SEric Biggers */ 1707bbd55937SEric Biggers struct percpu_rw_semaphore s_writepages_rwsem; 17085e405595SDan Williams struct dax_device *s_daxdev; 1709cd913c76SChristoph Hellwig u64 s_dax_part_off; 171046f870d6STheodore Ts'o #ifdef CONFIG_EXT4_DEBUG 171146f870d6STheodore Ts'o unsigned long s_simulate_fail; 171246f870d6STheodore Ts'o #endif 1713bc71726cSzhangyi (F) /* Record the errseq of the backing block device */ 1714bc71726cSzhangyi (F) errseq_t s_bdev_wb_err; 1715bc71726cSzhangyi (F) spinlock_t s_bdev_wb_lock; 1716aa75f4d3SHarshad Shirwadkar 1717c92dc856SJan Kara /* Information about errors that happened during this mount */ 1718c92dc856SJan Kara spinlock_t s_error_lock; 1719c92dc856SJan Kara int s_add_error_count; 1720c92dc856SJan Kara int s_first_error_code; 1721c92dc856SJan Kara __u32 s_first_error_line; 1722c92dc856SJan Kara __u32 s_first_error_ino; 1723c92dc856SJan Kara __u64 s_first_error_block; 1724c92dc856SJan Kara const char *s_first_error_func; 1725c92dc856SJan Kara time64_t s_first_error_time; 1726c92dc856SJan Kara int s_last_error_code; 1727c92dc856SJan Kara __u32 s_last_error_line; 1728c92dc856SJan Kara __u32 s_last_error_ino; 1729c92dc856SJan Kara __u64 s_last_error_block; 1730c92dc856SJan Kara const char *s_last_error_func; 1731c92dc856SJan Kara time64_t s_last_error_time; 1732c92dc856SJan Kara /* 1733c92dc856SJan Kara * If we are in a context where we cannot update error information in 1734c92dc856SJan Kara * the on-disk superblock, we queue this work to do it. 1735c92dc856SJan Kara */ 1736c92dc856SJan Kara struct work_struct s_error_work; 1737c92dc856SJan Kara 17387bbbe241SHarshad Shirwadkar /* Ext4 fast commit sub transaction ID */ 1739aa75f4d3SHarshad Shirwadkar atomic_t s_fc_subtid; 17407bbbe241SHarshad Shirwadkar 1741aa75f4d3SHarshad Shirwadkar /* 1742aa75f4d3SHarshad Shirwadkar * After commit starts, the main queue gets locked, and the further 1743aa75f4d3SHarshad Shirwadkar * updates get added in the staging queue. 1744aa75f4d3SHarshad Shirwadkar */ 1745aa75f4d3SHarshad Shirwadkar #define FC_Q_MAIN 0 1746aa75f4d3SHarshad Shirwadkar #define FC_Q_STAGING 1 1747aa75f4d3SHarshad Shirwadkar struct list_head s_fc_q[2]; /* Inodes staged for fast commit 1748aa75f4d3SHarshad Shirwadkar * that have data changes in them. 1749aa75f4d3SHarshad Shirwadkar */ 1750aa75f4d3SHarshad Shirwadkar struct list_head s_fc_dentry_q[2]; /* directory entry updates */ 1751aa75f4d3SHarshad Shirwadkar unsigned int s_fc_bytes; 1752aa75f4d3SHarshad Shirwadkar /* 1753aa75f4d3SHarshad Shirwadkar * Main fast commit lock. This lock protects accesses to the 1754aa75f4d3SHarshad Shirwadkar * following fields: 1755aa75f4d3SHarshad Shirwadkar * ei->i_fc_list, s_fc_dentry_q, s_fc_q, s_fc_bytes, s_fc_bh. 1756aa75f4d3SHarshad Shirwadkar */ 1757aa75f4d3SHarshad Shirwadkar spinlock_t s_fc_lock; 1758aa75f4d3SHarshad Shirwadkar struct buffer_head *s_fc_bh; 1759aa75f4d3SHarshad Shirwadkar struct ext4_fc_stats s_fc_stats; 1760e85c81baSXin Yin tid_t s_fc_ineligible_tid; 17618016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 17628016e29fSHarshad Shirwadkar int s_fc_debug_max_replay; 17638016e29fSHarshad Shirwadkar #endif 17648016e29fSHarshad Shirwadkar struct ext4_fc_replay_state s_fc_replay_state; 1765ca0faba0STheodore Ts'o }; 1766ca0faba0STheodore Ts'o 17673dcf5451SChristoph Hellwig static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) 17683dcf5451SChristoph Hellwig { 17693dcf5451SChristoph Hellwig return sb->s_fs_info; 17703dcf5451SChristoph Hellwig } 17713dcf5451SChristoph Hellwig static inline struct ext4_inode_info *EXT4_I(struct inode *inode) 17723dcf5451SChristoph Hellwig { 17733dcf5451SChristoph Hellwig return container_of(inode, struct ext4_inode_info, vfs_inode); 17743dcf5451SChristoph Hellwig } 17753dcf5451SChristoph Hellwig 17763dcf5451SChristoph Hellwig static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) 17773dcf5451SChristoph Hellwig { 17783dcf5451SChristoph Hellwig return ino == EXT4_ROOT_INO || 17793dcf5451SChristoph Hellwig (ino >= EXT4_FIRST_INO(sb) && 17803dcf5451SChristoph Hellwig ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); 17813dcf5451SChristoph Hellwig } 178219f5fb7aSTheodore Ts'o 178319f5fb7aSTheodore Ts'o /* 17841d0c3924STheodore Ts'o * Returns: sbi->field[index] 17851d0c3924STheodore Ts'o * Used to access an array element from the following sbi fields which require 17861d0c3924STheodore Ts'o * rcu protection to avoid dereferencing an invalid pointer due to reassignment 17871d0c3924STheodore Ts'o * - s_group_desc 17881d0c3924STheodore Ts'o * - s_group_info 17891d0c3924STheodore Ts'o * - s_flex_group 17901d0c3924STheodore Ts'o */ 17911d0c3924STheodore Ts'o #define sbi_array_rcu_deref(sbi, field, index) \ 17921d0c3924STheodore Ts'o ({ \ 17931d0c3924STheodore Ts'o typeof(*((sbi)->field)) _v; \ 17941d0c3924STheodore Ts'o rcu_read_lock(); \ 17951d0c3924STheodore Ts'o _v = ((typeof(_v)*)rcu_dereference((sbi)->field))[index]; \ 17961d0c3924STheodore Ts'o rcu_read_unlock(); \ 17971d0c3924STheodore Ts'o _v; \ 17981d0c3924STheodore Ts'o }) 17991d0c3924STheodore Ts'o 18001d0c3924STheodore Ts'o /* 18019b5f6c9bSHarshad Shirwadkar * run-time mount flags 18029b5f6c9bSHarshad Shirwadkar */ 18039b5f6c9bSHarshad Shirwadkar enum { 18049b5f6c9bSHarshad Shirwadkar EXT4_MF_MNTDIR_SAMPLED, 18059b5f6c9bSHarshad Shirwadkar EXT4_MF_FS_ABORTED, /* Fatal error detected */ 1806bdc8a53aSXin Yin EXT4_MF_FC_INELIGIBLE /* Fast commit ineligible */ 18079b5f6c9bSHarshad Shirwadkar }; 18089b5f6c9bSHarshad Shirwadkar 18099b5f6c9bSHarshad Shirwadkar static inline void ext4_set_mount_flag(struct super_block *sb, int bit) 18109b5f6c9bSHarshad Shirwadkar { 18119b5f6c9bSHarshad Shirwadkar set_bit(bit, &EXT4_SB(sb)->s_mount_flags); 18129b5f6c9bSHarshad Shirwadkar } 18139b5f6c9bSHarshad Shirwadkar 18149b5f6c9bSHarshad Shirwadkar static inline void ext4_clear_mount_flag(struct super_block *sb, int bit) 18159b5f6c9bSHarshad Shirwadkar { 18169b5f6c9bSHarshad Shirwadkar clear_bit(bit, &EXT4_SB(sb)->s_mount_flags); 18179b5f6c9bSHarshad Shirwadkar } 18189b5f6c9bSHarshad Shirwadkar 18199b5f6c9bSHarshad Shirwadkar static inline int ext4_test_mount_flag(struct super_block *sb, int bit) 18209b5f6c9bSHarshad Shirwadkar { 18219b5f6c9bSHarshad Shirwadkar return test_bit(bit, &EXT4_SB(sb)->s_mount_flags); 18229b5f6c9bSHarshad Shirwadkar } 18239b5f6c9bSHarshad Shirwadkar 18249b5f6c9bSHarshad Shirwadkar 18259b5f6c9bSHarshad Shirwadkar /* 182646f870d6STheodore Ts'o * Simulate_fail codes 182746f870d6STheodore Ts'o */ 182846f870d6STheodore Ts'o #define EXT4_SIM_BBITMAP_EIO 1 182946f870d6STheodore Ts'o #define EXT4_SIM_BBITMAP_CRC 2 183046f870d6STheodore Ts'o #define EXT4_SIM_IBITMAP_EIO 3 183146f870d6STheodore Ts'o #define EXT4_SIM_IBITMAP_CRC 4 183246f870d6STheodore Ts'o #define EXT4_SIM_INODE_EIO 5 183346f870d6STheodore Ts'o #define EXT4_SIM_INODE_CRC 6 183446f870d6STheodore Ts'o #define EXT4_SIM_DIRBLOCK_EIO 7 183546f870d6STheodore Ts'o #define EXT4_SIM_DIRBLOCK_CRC 8 183646f870d6STheodore Ts'o 183746f870d6STheodore Ts'o static inline bool ext4_simulate_fail(struct super_block *sb, 183846f870d6STheodore Ts'o unsigned long code) 183946f870d6STheodore Ts'o { 184046f870d6STheodore Ts'o #ifdef CONFIG_EXT4_DEBUG 184146f870d6STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 184246f870d6STheodore Ts'o 184346f870d6STheodore Ts'o if (unlikely(sbi->s_simulate_fail == code)) { 184446f870d6STheodore Ts'o sbi->s_simulate_fail = 0; 184546f870d6STheodore Ts'o return true; 184646f870d6STheodore Ts'o } 184746f870d6STheodore Ts'o #endif 184846f870d6STheodore Ts'o return false; 184946f870d6STheodore Ts'o } 185046f870d6STheodore Ts'o 185146f870d6STheodore Ts'o static inline void ext4_simulate_fail_bh(struct super_block *sb, 185246f870d6STheodore Ts'o struct buffer_head *bh, 185346f870d6STheodore Ts'o unsigned long code) 185446f870d6STheodore Ts'o { 185546f870d6STheodore Ts'o if (!IS_ERR(bh) && ext4_simulate_fail(sb, code)) 185646f870d6STheodore Ts'o clear_buffer_uptodate(bh); 185746f870d6STheodore Ts'o } 185846f870d6STheodore Ts'o 185946f870d6STheodore Ts'o /* 1860878520acSTheodore Ts'o * Error number codes for s_{first,last}_error_errno 1861878520acSTheodore Ts'o * 1862878520acSTheodore Ts'o * Linux errno numbers are architecture specific, so we need to translate 1863878520acSTheodore Ts'o * them into something which is architecture independent. We don't define 1864878520acSTheodore Ts'o * codes for all errno's; just the ones which are most likely to be the cause 1865878520acSTheodore Ts'o * of an ext4_error() call. 1866878520acSTheodore Ts'o */ 1867878520acSTheodore Ts'o #define EXT4_ERR_UNKNOWN 1 1868878520acSTheodore Ts'o #define EXT4_ERR_EIO 2 1869878520acSTheodore Ts'o #define EXT4_ERR_ENOMEM 3 1870878520acSTheodore Ts'o #define EXT4_ERR_EFSBADCRC 4 1871878520acSTheodore Ts'o #define EXT4_ERR_EFSCORRUPTED 5 1872878520acSTheodore Ts'o #define EXT4_ERR_ENOSPC 6 1873878520acSTheodore Ts'o #define EXT4_ERR_ENOKEY 7 1874878520acSTheodore Ts'o #define EXT4_ERR_EROFS 8 1875878520acSTheodore Ts'o #define EXT4_ERR_EFBIG 9 1876878520acSTheodore Ts'o #define EXT4_ERR_EEXIST 10 1877878520acSTheodore Ts'o #define EXT4_ERR_ERANGE 11 1878878520acSTheodore Ts'o #define EXT4_ERR_EOVERFLOW 12 1879878520acSTheodore Ts'o #define EXT4_ERR_EBUSY 13 1880878520acSTheodore Ts'o #define EXT4_ERR_ENOTDIR 14 1881878520acSTheodore Ts'o #define EXT4_ERR_ENOTEMPTY 15 1882878520acSTheodore Ts'o #define EXT4_ERR_ESHUTDOWN 16 1883878520acSTheodore Ts'o #define EXT4_ERR_EFAULT 17 1884878520acSTheodore Ts'o 1885878520acSTheodore Ts'o /* 188619f5fb7aSTheodore Ts'o * Inode dynamic state flags 188719f5fb7aSTheodore Ts'o */ 188819f5fb7aSTheodore Ts'o enum { 188919f5fb7aSTheodore Ts'o EXT4_STATE_JDATA, /* journaled data exists */ 189019f5fb7aSTheodore Ts'o EXT4_STATE_NEW, /* inode is newly created */ 189119f5fb7aSTheodore Ts'o EXT4_STATE_XATTR, /* has in-inode xattrs */ 189219f5fb7aSTheodore Ts'o EXT4_STATE_NO_EXPAND, /* No space for expansion */ 189319f5fb7aSTheodore Ts'o EXT4_STATE_DA_ALLOC_CLOSE, /* Alloc DA blks on close */ 189419f5fb7aSTheodore Ts'o EXT4_STATE_EXT_MIGRATE, /* Inode is migrating */ 189514ece102SFrank Mayhar EXT4_STATE_NEWENTRY, /* File just added to dir */ 189667cf5b09STao Ma EXT4_STATE_MAY_INLINE_DATA, /* may have in-inode data */ 18977869a4a6STheodore Ts'o EXT4_STATE_EXT_PRECACHED, /* extents have been precached */ 1898a6d05676STahsin Erdogan EXT4_STATE_LUSTRE_EA_INODE, /* Lustre-style ea_inode */ 1899c93d8f88SEric Biggers EXT4_STATE_VERITY_IN_PROGRESS, /* building fs-verity Merkle tree */ 1900aa75f4d3SHarshad Shirwadkar EXT4_STATE_FC_COMMITTING, /* Fast commit ongoing */ 190102f310fcSJan Kara EXT4_STATE_ORPHAN_FILE, /* Inode orphaned in orphan file */ 190219f5fb7aSTheodore Ts'o }; 190319f5fb7aSTheodore Ts'o 1904353eb83cSTheodore Ts'o #define EXT4_INODE_BIT_FNS(name, field, offset) \ 190512e9b892SDmitry Monakhov static inline int ext4_test_inode_##name(struct inode *inode, int bit) \ 190612e9b892SDmitry Monakhov { \ 1907353eb83cSTheodore Ts'o return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 190812e9b892SDmitry Monakhov } \ 190912e9b892SDmitry Monakhov static inline void ext4_set_inode_##name(struct inode *inode, int bit) \ 191012e9b892SDmitry Monakhov { \ 1911353eb83cSTheodore Ts'o set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 191212e9b892SDmitry Monakhov } \ 191312e9b892SDmitry Monakhov static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \ 191412e9b892SDmitry Monakhov { \ 1915353eb83cSTheodore Ts'o clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 191619f5fb7aSTheodore Ts'o } 191719f5fb7aSTheodore Ts'o 19183f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 19193f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 19203f61c0ccSAndreas Dilger static inline int ext4_test_inode_flag(struct inode *inode, int bit); 19213f61c0ccSAndreas Dilger static inline void ext4_set_inode_flag(struct inode *inode, int bit); 19223f61c0ccSAndreas Dilger static inline void ext4_clear_inode_flag(struct inode *inode, int bit); 1923353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(flag, flags, 0) 19243f61c0ccSAndreas Dilger 19253f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 19263f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 19273f61c0ccSAndreas Dilger static inline int ext4_test_inode_state(struct inode *inode, int bit); 19283f61c0ccSAndreas Dilger static inline void ext4_set_inode_state(struct inode *inode, int bit); 19293f61c0ccSAndreas Dilger static inline void ext4_clear_inode_state(struct inode *inode, int bit); 1930353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 1931353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, state_flags, 0) 1932353eb83cSTheodore Ts'o 1933353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1934353eb83cSTheodore Ts'o { 1935353eb83cSTheodore Ts'o (ei)->i_state_flags = 0; 1936353eb83cSTheodore Ts'o } 1937353eb83cSTheodore Ts'o #else 1938353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, flags, 32) 1939353eb83cSTheodore Ts'o 1940353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1941353eb83cSTheodore Ts'o { 1942353eb83cSTheodore Ts'o /* We depend on the fact that callers will set i_flags */ 1943353eb83cSTheodore Ts'o } 1944353eb83cSTheodore Ts'o #endif 19453dcf5451SChristoph Hellwig #else 19463dcf5451SChristoph Hellwig /* Assume that user mode programs are passing in an ext4fs superblock, not 19473dcf5451SChristoph Hellwig * a kernel struct super_block. This will allow us to call the feature-test 19483dcf5451SChristoph Hellwig * macros from user land. */ 19493dcf5451SChristoph Hellwig #define EXT4_SB(sb) (sb) 19503dcf5451SChristoph Hellwig #endif 19513dcf5451SChristoph Hellwig 1952c93d8f88SEric Biggers static inline bool ext4_verity_in_progress(struct inode *inode) 1953c93d8f88SEric Biggers { 1954c93d8f88SEric Biggers return IS_ENABLED(CONFIG_FS_VERITY) && 1955c93d8f88SEric Biggers ext4_test_inode_state(inode, EXT4_STATE_VERITY_IN_PROGRESS); 1956c93d8f88SEric Biggers } 1957c93d8f88SEric Biggers 19583dcf5451SChristoph Hellwig #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime 19593dcf5451SChristoph Hellwig 19603dcf5451SChristoph Hellwig /* 19613dcf5451SChristoph Hellwig * Codes for operating systems 19623dcf5451SChristoph Hellwig */ 19633dcf5451SChristoph Hellwig #define EXT4_OS_LINUX 0 19643dcf5451SChristoph Hellwig #define EXT4_OS_HURD 1 19653dcf5451SChristoph Hellwig #define EXT4_OS_MASIX 2 19663dcf5451SChristoph Hellwig #define EXT4_OS_FREEBSD 3 19673dcf5451SChristoph Hellwig #define EXT4_OS_LITES 4 19683dcf5451SChristoph Hellwig 19693dcf5451SChristoph Hellwig /* 19703dcf5451SChristoph Hellwig * Revision levels 19713dcf5451SChristoph Hellwig */ 19723dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ 19733dcf5451SChristoph Hellwig #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ 19743dcf5451SChristoph Hellwig 19753dcf5451SChristoph Hellwig #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV 19763dcf5451SChristoph Hellwig 19773dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_INODE_SIZE 128 19783dcf5451SChristoph Hellwig 19794881c497SDeepa Dinamani #define EXT4_EXTRA_TIMESTAMP_MAX (((s64)1 << 34) - 1 + S32_MIN) 19804881c497SDeepa Dinamani #define EXT4_NON_EXTRA_TIMESTAMP_MAX S32_MAX 19814881c497SDeepa Dinamani #define EXT4_TIMESTAMP_MIN S32_MIN 19824881c497SDeepa Dinamani 19833dcf5451SChristoph Hellwig /* 19843dcf5451SChristoph Hellwig * Feature set definitions 19853dcf5451SChristoph Hellwig */ 19863dcf5451SChristoph Hellwig 19873dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 19883dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 19893dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 19903dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 19913dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 19923dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 19931beeef1bSDarrick J. Wong #define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200 1994a44ad683SHarshad Shirwadkar /* 1995a44ad683SHarshad Shirwadkar * The reason why "FAST_COMMIT" is a compat feature is that, FS becomes 1996a44ad683SHarshad Shirwadkar * incompatible only if fast commit blocks are present in the FS. Since we 1997a44ad683SHarshad Shirwadkar * clear the journal (and thus the fast commit blocks), we don't mark FS as 1998a44ad683SHarshad Shirwadkar * incompatible. We also have a JBD2 incompat feature, which gets set when 1999a44ad683SHarshad Shirwadkar * there are fast commit blocks present in the journal. 2000a44ad683SHarshad Shirwadkar */ 2001995a3ed6SHarshad Shirwadkar #define EXT4_FEATURE_COMPAT_FAST_COMMIT 0x0400 2002b925acb8SEric Biggers #define EXT4_FEATURE_COMPAT_STABLE_INODES 0x0800 200302f310fcSJan Kara #define EXT4_FEATURE_COMPAT_ORPHAN_FILE 0x1000 /* Orphan file exists */ 20043dcf5451SChristoph Hellwig 20053dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 20063dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 20073dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 20083dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 20093dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 20103dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 20113dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 2012ae812306SAditya Kali #define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100 2013281b5995STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200 2014e6153918SDarrick J. Wong /* 2015e6153918SDarrick J. Wong * METADATA_CSUM also enables group descriptor checksums (GDT_CSUM). When 2016e6153918SDarrick J. Wong * METADATA_CSUM is set, group descriptor checksums use the same algorithm as 2017e6153918SDarrick J. Wong * all other data structures' checksums. However, the METADATA_CSUM and 2018e6153918SDarrick J. Wong * GDT_CSUM bits are mutually exclusive. 2019e6153918SDarrick J. Wong */ 20209b90e5e0STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400 20212cb5cc8bSDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000 20228b4953e1STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000 2023c93d8f88SEric Biggers #define EXT4_FEATURE_RO_COMPAT_VERITY 0x8000 202402f310fcSJan Kara #define EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT 0x10000 /* Orphan file may be 202502f310fcSJan Kara non-empty */ 20263dcf5451SChristoph Hellwig 20273dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 20283dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 20293dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ 20303dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ 20313dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 20323dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ 20333dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 20343dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 20353dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 2036f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */ 2037f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */ 20388c81bd8fSDarrick J. Wong #define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000 20399b90e5e0STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ 204067cf5b09STao Ma #define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ 20413edc18d8STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 2042c83ad55eSGabriel Krisman Bertazi #define EXT4_FEATURE_INCOMPAT_CASEFOLD 0x20000 20433dcf5451SChristoph Hellwig 2044c9e716ebSAndreas Dilger extern void ext4_update_dynamic_rev(struct super_block *sb); 2045c9e716ebSAndreas Dilger 2046e2b911c5SDarrick J. Wong #define EXT4_FEATURE_COMPAT_FUNCS(name, flagname) \ 2047e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 2048e2b911c5SDarrick J. Wong { \ 2049e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_compat & \ 2050e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname)) != 0); \ 2051e2b911c5SDarrick J. Wong } \ 2052e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 2053e2b911c5SDarrick J. Wong { \ 2054c9e716ebSAndreas Dilger ext4_update_dynamic_rev(sb); \ 2055e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_compat |= \ 2056e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ 2057e2b911c5SDarrick J. Wong } \ 2058e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 2059e2b911c5SDarrick J. Wong { \ 2060e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_compat &= \ 2061e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ 2062e2b911c5SDarrick J. Wong } 2063e2b911c5SDarrick J. Wong 2064e2b911c5SDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_FUNCS(name, flagname) \ 2065e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 2066e2b911c5SDarrick J. Wong { \ 2067e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ 2068e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname)) != 0); \ 2069e2b911c5SDarrick J. Wong } \ 2070e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 2071e2b911c5SDarrick J. Wong { \ 2072c9e716ebSAndreas Dilger ext4_update_dynamic_rev(sb); \ 2073e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_ro_compat |= \ 2074e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ 2075e2b911c5SDarrick J. Wong } \ 2076e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 2077e2b911c5SDarrick J. Wong { \ 2078e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_ro_compat &= \ 2079e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ 2080e2b911c5SDarrick J. Wong } 2081e2b911c5SDarrick J. Wong 2082e2b911c5SDarrick J. Wong #define EXT4_FEATURE_INCOMPAT_FUNCS(name, flagname) \ 2083e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 2084e2b911c5SDarrick J. Wong { \ 2085e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ 2086e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname)) != 0); \ 2087e2b911c5SDarrick J. Wong } \ 2088e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 2089e2b911c5SDarrick J. Wong { \ 2090c9e716ebSAndreas Dilger ext4_update_dynamic_rev(sb); \ 2091e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_incompat |= \ 2092e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ 2093e2b911c5SDarrick J. Wong } \ 2094e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 2095e2b911c5SDarrick J. Wong { \ 2096e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_incompat &= \ 2097e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ 2098e2b911c5SDarrick J. Wong } 2099e2b911c5SDarrick J. Wong 2100e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(dir_prealloc, DIR_PREALLOC) 2101e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(imagic_inodes, IMAGIC_INODES) 2102e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(journal, HAS_JOURNAL) 2103e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(xattr, EXT_ATTR) 2104e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(resize_inode, RESIZE_INODE) 2105e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(dir_index, DIR_INDEX) 2106e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(sparse_super2, SPARSE_SUPER2) 2107995a3ed6SHarshad Shirwadkar EXT4_FEATURE_COMPAT_FUNCS(fast_commit, FAST_COMMIT) 2108b925acb8SEric Biggers EXT4_FEATURE_COMPAT_FUNCS(stable_inodes, STABLE_INODES) 210902f310fcSJan Kara EXT4_FEATURE_COMPAT_FUNCS(orphan_file, ORPHAN_FILE) 2110e2b911c5SDarrick J. Wong 2111e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(sparse_super, SPARSE_SUPER) 2112e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(large_file, LARGE_FILE) 2113e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(btree_dir, BTREE_DIR) 2114e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(huge_file, HUGE_FILE) 2115e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(gdt_csum, GDT_CSUM) 2116e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(dir_nlink, DIR_NLINK) 2117e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(extra_isize, EXTRA_ISIZE) 2118e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(quota, QUOTA) 2119e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(bigalloc, BIGALLOC) 2120e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(metadata_csum, METADATA_CSUM) 2121e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(readonly, READONLY) 2122e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(project, PROJECT) 2123c93d8f88SEric Biggers EXT4_FEATURE_RO_COMPAT_FUNCS(verity, VERITY) 212402f310fcSJan Kara EXT4_FEATURE_RO_COMPAT_FUNCS(orphan_present, ORPHAN_PRESENT) 2125e2b911c5SDarrick J. Wong 2126e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(compression, COMPRESSION) 2127e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(filetype, FILETYPE) 2128e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(journal_needs_recovery, RECOVER) 2129e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(journal_dev, JOURNAL_DEV) 2130e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(meta_bg, META_BG) 2131e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(extents, EXTENTS) 2132e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT) 2133e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(mmp, MMP) 2134e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(flex_bg, FLEX_BG) 2135e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(ea_inode, EA_INODE) 2136e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(dirdata, DIRDATA) 2137e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, CSUM_SEED) 2138e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(largedir, LARGEDIR) 2139e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, INLINE_DATA) 2140e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT) 2141c83ad55eSGabriel Krisman Bertazi EXT4_FEATURE_INCOMPAT_FUNCS(casefold, CASEFOLD) 2142e2b911c5SDarrick J. Wong 21432035e776STheodore Ts'o #define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 21442035e776STheodore Ts'o #define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 21452035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 21462035e776STheodore Ts'o #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 21472035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 21482035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 21492035e776STheodore Ts'o 21502035e776STheodore Ts'o #define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 21512035e776STheodore Ts'o #define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 21522035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_RECOVER| \ 21532035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 21542035e776STheodore Ts'o #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 21552035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 21562035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 21572035e776STheodore Ts'o 215802f310fcSJan Kara #define EXT4_FEATURE_COMPAT_SUPP (EXT4_FEATURE_COMPAT_EXT_ATTR| \ 215902f310fcSJan Kara EXT4_FEATURE_COMPAT_ORPHAN_FILE) 21603dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 21613dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_RECOVER| \ 21623dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_META_BG| \ 21633dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_EXTENTS| \ 21643dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_64BIT| \ 2165c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_FLEX_BG| \ 2166e50e5129SAndreas Dilger EXT4_FEATURE_INCOMPAT_EA_INODE| \ 2167f08225d1STao Ma EXT4_FEATURE_INCOMPAT_MMP | \ 21686ddb2447STheodore Ts'o EXT4_FEATURE_INCOMPAT_INLINE_DATA | \ 21698c81bd8fSDarrick J. Wong EXT4_FEATURE_INCOMPAT_ENCRYPT | \ 2170c83ad55eSGabriel Krisman Bertazi EXT4_FEATURE_INCOMPAT_CASEFOLD | \ 2171e08ac99fSArtem Blagodarenko EXT4_FEATURE_INCOMPAT_CSUM_SEED | \ 2172e08ac99fSArtem Blagodarenko EXT4_FEATURE_INCOMPAT_LARGEDIR) 21733dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 21743dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 21753dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ 21763dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ 21773dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ 21783dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ 21796f16b606STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\ 2180e93376c2SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_BIGALLOC |\ 21817c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\ 2182040cb378SLi Xi EXT4_FEATURE_RO_COMPAT_QUOTA |\ 2183c93d8f88SEric Biggers EXT4_FEATURE_RO_COMPAT_PROJECT |\ 218402f310fcSJan Kara EXT4_FEATURE_RO_COMPAT_VERITY |\ 218502f310fcSJan Kara EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT) 21863dcf5451SChristoph Hellwig 2187e2b911c5SDarrick J. Wong #define EXTN_FEATURE_FUNCS(ver) \ 2188e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_compat_features(struct super_block *sb) \ 2189e2b911c5SDarrick J. Wong { \ 2190e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_compat & \ 2191e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_COMPAT_SUPP)) != 0); \ 2192e2b911c5SDarrick J. Wong } \ 2193e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_ro_compat_features(struct super_block *sb) \ 2194e2b911c5SDarrick J. Wong { \ 2195e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ 2196e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_RO_COMPAT_SUPP)) != 0); \ 2197e2b911c5SDarrick J. Wong } \ 2198e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_incompat_features(struct super_block *sb) \ 2199e2b911c5SDarrick J. Wong { \ 2200e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ 2201e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_INCOMPAT_SUPP)) != 0); \ 2202e2b911c5SDarrick J. Wong } 2203e2b911c5SDarrick J. Wong 2204e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(2) 2205e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(3) 2206e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(4) 2207e2b911c5SDarrick J. Wong 2208e2b911c5SDarrick J. Wong static inline bool ext4_has_compat_features(struct super_block *sb) 2209e2b911c5SDarrick J. Wong { 2210e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_compat != 0); 2211e2b911c5SDarrick J. Wong } 2212e2b911c5SDarrick J. Wong static inline bool ext4_has_ro_compat_features(struct super_block *sb) 2213e2b911c5SDarrick J. Wong { 2214e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_ro_compat != 0); 2215e2b911c5SDarrick J. Wong } 2216e2b911c5SDarrick J. Wong static inline bool ext4_has_incompat_features(struct super_block *sb) 2217e2b911c5SDarrick J. Wong { 2218e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_incompat != 0); 2219e2b911c5SDarrick J. Wong } 2220e2b911c5SDarrick J. Wong 222125c6d98fSJan Kara extern int ext4_feature_set_ok(struct super_block *sb, int readonly); 222225c6d98fSJan Kara 22233dcf5451SChristoph Hellwig /* 22249549a168STheodore Ts'o * Superblock flags 22259549a168STheodore Ts'o */ 22269549a168STheodore Ts'o #define EXT4_FLAGS_RESIZING 0 22270db1ff22STheodore Ts'o #define EXT4_FLAGS_SHUTDOWN 1 2228a8ab6d38SIra Weiny #define EXT4_FLAGS_BDEV_IS_DAX 2 22290db1ff22STheodore Ts'o 22300db1ff22STheodore Ts'o static inline int ext4_forced_shutdown(struct ext4_sb_info *sbi) 22310db1ff22STheodore Ts'o { 22320db1ff22STheodore Ts'o return test_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 22330db1ff22STheodore Ts'o } 22349549a168STheodore Ts'o 22359549a168STheodore Ts'o /* 22363dcf5451SChristoph Hellwig * Default values for user and/or group using reserved blocks 22373dcf5451SChristoph Hellwig */ 22383dcf5451SChristoph Hellwig #define EXT4_DEF_RESUID 0 22393dcf5451SChristoph Hellwig #define EXT4_DEF_RESGID 0 22403dcf5451SChristoph Hellwig 2241040cb378SLi Xi /* 2242040cb378SLi Xi * Default project ID 2243040cb378SLi Xi */ 2244040cb378SLi Xi #define EXT4_DEF_PROJID 0 2245040cb378SLi Xi 2246240799cdSTheodore Ts'o #define EXT4_DEF_INODE_READAHEAD_BLKS 32 2247240799cdSTheodore Ts'o 22483dcf5451SChristoph Hellwig /* 22493dcf5451SChristoph Hellwig * Default mount options 22503dcf5451SChristoph Hellwig */ 22513dcf5451SChristoph Hellwig #define EXT4_DEFM_DEBUG 0x0001 22523dcf5451SChristoph Hellwig #define EXT4_DEFM_BSDGROUPS 0x0002 22533dcf5451SChristoph Hellwig #define EXT4_DEFM_XATTR_USER 0x0004 22543dcf5451SChristoph Hellwig #define EXT4_DEFM_ACL 0x0008 22553dcf5451SChristoph Hellwig #define EXT4_DEFM_UID16 0x0010 22563dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE 0x0060 22573dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_DATA 0x0020 22583dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_ORDERED 0x0040 22593dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_WBACK 0x0060 22608b67f04aSTheodore Ts'o #define EXT4_DEFM_NOBARRIER 0x0100 22618b67f04aSTheodore Ts'o #define EXT4_DEFM_BLOCK_VALIDITY 0x0200 22628b67f04aSTheodore Ts'o #define EXT4_DEFM_DISCARD 0x0400 22638b67f04aSTheodore Ts'o #define EXT4_DEFM_NODELALLOC 0x0800 22643dcf5451SChristoph Hellwig 22653dcf5451SChristoph Hellwig /* 226630773840STheodore Ts'o * Default journal batch times 226730773840STheodore Ts'o */ 226830773840STheodore Ts'o #define EXT4_DEF_MIN_BATCH_TIME 0 226930773840STheodore Ts'o #define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ 227030773840STheodore Ts'o 227130773840STheodore Ts'o /* 2272a4912123STheodore Ts'o * Minimum number of groups in a flexgroup before we separate out 2273a4912123STheodore Ts'o * directories into the first block group of a flexgroup 2274a4912123STheodore Ts'o */ 2275a4912123STheodore Ts'o #define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4 2276a4912123STheodore Ts'o 2277a4912123STheodore Ts'o /* 22783dcf5451SChristoph Hellwig * Structure of a directory entry 22793dcf5451SChristoph Hellwig */ 22803dcf5451SChristoph Hellwig #define EXT4_NAME_LEN 255 2281c186f088SYe Bin /* 2282c186f088SYe Bin * Base length of the ext4 directory entry excluding the name length 2283c186f088SYe Bin */ 2284c186f088SYe Bin #define EXT4_BASE_DIR_LEN (sizeof(struct ext4_dir_entry_2) - EXT4_NAME_LEN) 22853dcf5451SChristoph Hellwig 22863dcf5451SChristoph Hellwig struct ext4_dir_entry { 22873dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 22883dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 22893dcf5451SChristoph Hellwig __le16 name_len; /* Name length */ 22903dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 22913dcf5451SChristoph Hellwig }; 22923dcf5451SChristoph Hellwig 2293471fbbeaSDaniel Rosenberg 2294471fbbeaSDaniel Rosenberg /* 2295471fbbeaSDaniel Rosenberg * Encrypted Casefolded entries require saving the hash on disk. This structure 2296471fbbeaSDaniel Rosenberg * followed ext4_dir_entry_2's name[name_len] at the next 4 byte aligned 2297471fbbeaSDaniel Rosenberg * boundary. 2298471fbbeaSDaniel Rosenberg */ 2299471fbbeaSDaniel Rosenberg struct ext4_dir_entry_hash { 2300471fbbeaSDaniel Rosenberg __le32 hash; 2301471fbbeaSDaniel Rosenberg __le32 minor_hash; 2302471fbbeaSDaniel Rosenberg }; 2303471fbbeaSDaniel Rosenberg 23043dcf5451SChristoph Hellwig /* 23053dcf5451SChristoph Hellwig * The new version of the directory entry. Since EXT4 structures are 23063dcf5451SChristoph Hellwig * stored in intel byte order, and the name_len field could never be 23073dcf5451SChristoph Hellwig * bigger than 255 chars, it's safe to reclaim the extra byte for the 23083dcf5451SChristoph Hellwig * file_type field. 23093dcf5451SChristoph Hellwig */ 23103dcf5451SChristoph Hellwig struct ext4_dir_entry_2 { 23113dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 23123dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 23133dcf5451SChristoph Hellwig __u8 name_len; /* Name length */ 23149f364e1dSJonathan Grant __u8 file_type; /* See file type macros EXT4_FT_* below */ 23153dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 23163dcf5451SChristoph Hellwig }; 23173dcf5451SChristoph Hellwig 23183dcf5451SChristoph Hellwig /* 2319471fbbeaSDaniel Rosenberg * Access the hashes at the end of ext4_dir_entry_2 2320471fbbeaSDaniel Rosenberg */ 2321471fbbeaSDaniel Rosenberg #define EXT4_DIRENT_HASHES(entry) \ 2322471fbbeaSDaniel Rosenberg ((struct ext4_dir_entry_hash *) \ 2323471fbbeaSDaniel Rosenberg (((void *)(entry)) + \ 2324471fbbeaSDaniel Rosenberg ((8 + (entry)->name_len + EXT4_DIR_ROUND) & ~EXT4_DIR_ROUND))) 2325471fbbeaSDaniel Rosenberg #define EXT4_DIRENT_HASH(entry) le32_to_cpu(EXT4_DIRENT_HASHES(de)->hash) 2326471fbbeaSDaniel Rosenberg #define EXT4_DIRENT_MINOR_HASH(entry) \ 2327471fbbeaSDaniel Rosenberg le32_to_cpu(EXT4_DIRENT_HASHES(de)->minor_hash) 2328471fbbeaSDaniel Rosenberg 2329471fbbeaSDaniel Rosenberg static inline bool ext4_hash_in_dirent(const struct inode *inode) 2330471fbbeaSDaniel Rosenberg { 2331471fbbeaSDaniel Rosenberg return IS_CASEFOLDED(inode) && IS_ENCRYPTED(inode); 2332471fbbeaSDaniel Rosenberg } 2333471fbbeaSDaniel Rosenberg 2334471fbbeaSDaniel Rosenberg /* 2335e6153918SDarrick J. Wong * This is a bogus directory entry at the end of each leaf block that 2336e6153918SDarrick J. Wong * records checksums. 2337e6153918SDarrick J. Wong */ 2338e6153918SDarrick J. Wong struct ext4_dir_entry_tail { 2339e6153918SDarrick J. Wong __le32 det_reserved_zero1; /* Pretend to be unused */ 2340e6153918SDarrick J. Wong __le16 det_rec_len; /* 12 */ 2341e6153918SDarrick J. Wong __u8 det_reserved_zero2; /* Zero name length */ 2342e6153918SDarrick J. Wong __u8 det_reserved_ft; /* 0xDE, fake file type */ 2343e6153918SDarrick J. Wong __le32 det_checksum; /* crc32c(uuid+inum+dirblock) */ 2344e6153918SDarrick J. Wong }; 2345e6153918SDarrick J. Wong 23463c47d541STao Ma #define EXT4_DIRENT_TAIL(block, blocksize) \ 23473c47d541STao Ma ((struct ext4_dir_entry_tail *)(((void *)(block)) + \ 23483c47d541STao Ma ((blocksize) - \ 23493c47d541STao Ma sizeof(struct ext4_dir_entry_tail)))) 23503c47d541STao Ma 2351e6153918SDarrick J. Wong /* 23523dcf5451SChristoph Hellwig * Ext4 directory file types. Only the low 3 bits are used. The 23533dcf5451SChristoph Hellwig * other bits are reserved for now. 23543dcf5451SChristoph Hellwig */ 23553dcf5451SChristoph Hellwig #define EXT4_FT_UNKNOWN 0 23563dcf5451SChristoph Hellwig #define EXT4_FT_REG_FILE 1 23573dcf5451SChristoph Hellwig #define EXT4_FT_DIR 2 23583dcf5451SChristoph Hellwig #define EXT4_FT_CHRDEV 3 23593dcf5451SChristoph Hellwig #define EXT4_FT_BLKDEV 4 23603dcf5451SChristoph Hellwig #define EXT4_FT_FIFO 5 23613dcf5451SChristoph Hellwig #define EXT4_FT_SOCK 6 23623dcf5451SChristoph Hellwig #define EXT4_FT_SYMLINK 7 23633dcf5451SChristoph Hellwig 23643dcf5451SChristoph Hellwig #define EXT4_FT_MAX 8 23653dcf5451SChristoph Hellwig 2366e6153918SDarrick J. Wong #define EXT4_FT_DIR_CSUM 0xDE 2367e6153918SDarrick J. Wong 23683dcf5451SChristoph Hellwig /* 23693dcf5451SChristoph Hellwig * EXT4_DIR_PAD defines the directory entries boundaries 23703dcf5451SChristoph Hellwig * 23713dcf5451SChristoph Hellwig * NOTE: It must be a multiple of 4 23723dcf5451SChristoph Hellwig */ 23733dcf5451SChristoph Hellwig #define EXT4_DIR_PAD 4 23743dcf5451SChristoph Hellwig #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) 23753dcf5451SChristoph Hellwig #define EXT4_MAX_REC_LEN ((1<<16)-1) 23763dcf5451SChristoph Hellwig 23773dcf5451SChristoph Hellwig /* 2378471fbbeaSDaniel Rosenberg * The rec_len is dependent on the type of directory. Directories that are 2379471fbbeaSDaniel Rosenberg * casefolded and encrypted need to store the hash as well, so we add room for 2380471fbbeaSDaniel Rosenberg * ext4_extended_dir_entry_2. For all entries related to '.' or '..' you should 2381471fbbeaSDaniel Rosenberg * pass NULL for dir, as those entries do not use the extra fields. 2382471fbbeaSDaniel Rosenberg */ 2383471fbbeaSDaniel Rosenberg static inline unsigned int ext4_dir_rec_len(__u8 name_len, 2384471fbbeaSDaniel Rosenberg const struct inode *dir) 2385471fbbeaSDaniel Rosenberg { 2386471fbbeaSDaniel Rosenberg int rec_len = (name_len + 8 + EXT4_DIR_ROUND); 2387471fbbeaSDaniel Rosenberg 2388471fbbeaSDaniel Rosenberg if (dir && ext4_hash_in_dirent(dir)) 2389471fbbeaSDaniel Rosenberg rec_len += sizeof(struct ext4_dir_entry_hash); 2390471fbbeaSDaniel Rosenberg return (rec_len & ~EXT4_DIR_ROUND); 2391471fbbeaSDaniel Rosenberg } 2392471fbbeaSDaniel Rosenberg 2393471fbbeaSDaniel Rosenberg /* 23940cfc9255SEric Sandeen * If we ever get support for fs block sizes > page_size, we'll need 23950cfc9255SEric Sandeen * to remove the #if statements in the next two functions... 23960cfc9255SEric Sandeen */ 23970cfc9255SEric Sandeen static inline unsigned int 23980cfc9255SEric Sandeen ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize) 23990cfc9255SEric Sandeen { 24000cfc9255SEric Sandeen unsigned len = le16_to_cpu(dlen); 24010cfc9255SEric Sandeen 2402ea1754a0SKirill A. Shutemov #if (PAGE_SIZE >= 65536) 24030cfc9255SEric Sandeen if (len == EXT4_MAX_REC_LEN || len == 0) 24040cfc9255SEric Sandeen return blocksize; 24050cfc9255SEric Sandeen return (len & 65532) | ((len & 3) << 16); 24060cfc9255SEric Sandeen #else 24070cfc9255SEric Sandeen return len; 24080cfc9255SEric Sandeen #endif 24090cfc9255SEric Sandeen } 24100cfc9255SEric Sandeen 24110cfc9255SEric Sandeen static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize) 24120cfc9255SEric Sandeen { 2413a2e3965dSxu xin BUG_ON((len > blocksize) || (blocksize > (1 << 18)) || (len & 3)); 2414ea1754a0SKirill A. Shutemov #if (PAGE_SIZE >= 65536) 24150cfc9255SEric Sandeen if (len < 65536) 24160cfc9255SEric Sandeen return cpu_to_le16(len); 24170cfc9255SEric Sandeen if (len == blocksize) { 24180cfc9255SEric Sandeen if (blocksize == 65536) 24190cfc9255SEric Sandeen return cpu_to_le16(EXT4_MAX_REC_LEN); 24200cfc9255SEric Sandeen else 24210cfc9255SEric Sandeen return cpu_to_le16(0); 24220cfc9255SEric Sandeen } 24230cfc9255SEric Sandeen return cpu_to_le16((len & 65532) | ((len >> 16) & 3)); 24240cfc9255SEric Sandeen #else 24250cfc9255SEric Sandeen return cpu_to_le16(len); 24260cfc9255SEric Sandeen #endif 24270cfc9255SEric Sandeen } 24280cfc9255SEric Sandeen 24290cfc9255SEric Sandeen /* 24303dcf5451SChristoph Hellwig * Hash Tree Directory indexing 24313dcf5451SChristoph Hellwig * (c) Daniel Phillips, 2001 24323dcf5451SChristoph Hellwig */ 24333dcf5451SChristoph Hellwig 2434e2b911c5SDarrick J. Wong #define is_dx(dir) (ext4_has_feature_dir_index((dir)->i_sb) && \ 243512e9b892SDmitry Monakhov ext4_test_inode_flag((dir), EXT4_INODE_INDEX)) 2436c7414892SAndreas Dilger #define EXT4_DIR_LINK_MAX(dir) unlikely((dir)->i_nlink >= EXT4_LINK_MAX && \ 2437c7414892SAndreas Dilger !(ext4_has_feature_dir_nlink((dir)->i_sb) && is_dx(dir))) 24383dcf5451SChristoph Hellwig #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) 24393dcf5451SChristoph Hellwig 24403dcf5451SChristoph Hellwig /* Legal values for the dx_root hash_version field: */ 24413dcf5451SChristoph Hellwig 24423dcf5451SChristoph Hellwig #define DX_HASH_LEGACY 0 24433dcf5451SChristoph Hellwig #define DX_HASH_HALF_MD4 1 24443dcf5451SChristoph Hellwig #define DX_HASH_TEA 2 2445f99b2589STheodore Ts'o #define DX_HASH_LEGACY_UNSIGNED 3 2446f99b2589STheodore Ts'o #define DX_HASH_HALF_MD4_UNSIGNED 4 2447f99b2589STheodore Ts'o #define DX_HASH_TEA_UNSIGNED 5 2448471fbbeaSDaniel Rosenberg #define DX_HASH_SIPHASH 6 24493dcf5451SChristoph Hellwig 24500441984aSDarrick J. Wong static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc, 24510441984aSDarrick J. Wong const void *address, unsigned int length) 24520441984aSDarrick J. Wong { 24530441984aSDarrick J. Wong struct { 24540441984aSDarrick J. Wong struct shash_desc shash; 24553108b54bSTheodore Ts'o char ctx[4]; 24560441984aSDarrick J. Wong } desc; 24570441984aSDarrick J. Wong 24583108b54bSTheodore Ts'o BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx)); 24593108b54bSTheodore Ts'o 24600441984aSDarrick J. Wong desc.shash.tfm = sbi->s_chksum_driver; 24610441984aSDarrick J. Wong *(u32 *)desc.ctx = crc; 24620441984aSDarrick J. Wong 2463e7093f0dSPetros Koutoupis BUG_ON(crypto_shash_update(&desc.shash, address, length)); 24640441984aSDarrick J. Wong 24650441984aSDarrick J. Wong return *(u32 *)desc.ctx; 24660441984aSDarrick J. Wong } 24670441984aSDarrick J. Wong 24683dcf5451SChristoph Hellwig #ifdef __KERNEL__ 24693dcf5451SChristoph Hellwig 24703dcf5451SChristoph Hellwig /* hash info structure used by the directory hash */ 24713dcf5451SChristoph Hellwig struct dx_hash_info 24723dcf5451SChristoph Hellwig { 24733dcf5451SChristoph Hellwig u32 hash; 24743dcf5451SChristoph Hellwig u32 minor_hash; 24753dcf5451SChristoph Hellwig int hash_version; 24763dcf5451SChristoph Hellwig u32 *seed; 24773dcf5451SChristoph Hellwig }; 24783dcf5451SChristoph Hellwig 2479d1f5273eSFan Yong 2480d1f5273eSFan Yong /* 32 and 64 bit signed EOF for dx directories */ 2481d1f5273eSFan Yong #define EXT4_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1) 2482d1f5273eSFan Yong #define EXT4_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1) 2483d1f5273eSFan Yong 24843dcf5451SChristoph Hellwig 24853dcf5451SChristoph Hellwig /* 24863dcf5451SChristoph Hellwig * Control parameters used by ext4_htree_next_block 24873dcf5451SChristoph Hellwig */ 24883dcf5451SChristoph Hellwig #define HASH_NB_ALWAYS 1 24893dcf5451SChristoph Hellwig 24905b643f9cSTheodore Ts'o struct ext4_filename { 24915b643f9cSTheodore Ts'o const struct qstr *usr_fname; 2492a7550b30SJaegeuk Kim struct fscrypt_str disk_name; 24935b643f9cSTheodore Ts'o struct dx_hash_info hinfo; 2494643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 2495a7550b30SJaegeuk Kim struct fscrypt_str crypto_buf; 24965b643f9cSTheodore Ts'o #endif 24975298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 24983ae72562SGabriel Krisman Bertazi struct fscrypt_str cf_name; 24993ae72562SGabriel Krisman Bertazi #endif 25005b643f9cSTheodore Ts'o }; 25015b643f9cSTheodore Ts'o 25025b643f9cSTheodore Ts'o #define fname_name(p) ((p)->disk_name.name) 2503471fbbeaSDaniel Rosenberg #define fname_usr_name(p) ((p)->usr_fname->name) 25045b643f9cSTheodore Ts'o #define fname_len(p) ((p)->disk_name.len) 25053dcf5451SChristoph Hellwig 25063dcf5451SChristoph Hellwig /* 25073dcf5451SChristoph Hellwig * Describe an inode's exact location on disk and in memory 25083dcf5451SChristoph Hellwig */ 25093dcf5451SChristoph Hellwig struct ext4_iloc 25103dcf5451SChristoph Hellwig { 25113dcf5451SChristoph Hellwig struct buffer_head *bh; 25123dcf5451SChristoph Hellwig unsigned long offset; 25133dcf5451SChristoph Hellwig ext4_group_t block_group; 25143dcf5451SChristoph Hellwig }; 25153dcf5451SChristoph Hellwig 25163dcf5451SChristoph Hellwig static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) 25173dcf5451SChristoph Hellwig { 25183dcf5451SChristoph Hellwig return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); 25193dcf5451SChristoph Hellwig } 25203dcf5451SChristoph Hellwig 2521dec214d0STahsin Erdogan static inline bool ext4_is_quota_file(struct inode *inode) 2522dec214d0STahsin Erdogan { 2523dec214d0STahsin Erdogan return IS_NOQUOTA(inode) && 2524dec214d0STahsin Erdogan !(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL); 2525dec214d0STahsin Erdogan } 252602749a4cSTahsin Erdogan 25273dcf5451SChristoph Hellwig /* 25283dcf5451SChristoph Hellwig * This structure is stuffed into the struct file's private_data field 25293dcf5451SChristoph Hellwig * for directories. It is where we put information so that we can do 25303dcf5451SChristoph Hellwig * readdir operations in hash tree order. 25313dcf5451SChristoph Hellwig */ 25323dcf5451SChristoph Hellwig struct dir_private_info { 25333dcf5451SChristoph Hellwig struct rb_root root; 25343dcf5451SChristoph Hellwig struct rb_node *curr_node; 25353dcf5451SChristoph Hellwig struct fname *extra_fname; 25363dcf5451SChristoph Hellwig loff_t last_pos; 25373dcf5451SChristoph Hellwig __u32 curr_hash; 25383dcf5451SChristoph Hellwig __u32 curr_minor_hash; 25393dcf5451SChristoph Hellwig __u32 next_hash; 25403dcf5451SChristoph Hellwig }; 25413dcf5451SChristoph Hellwig 25423dcf5451SChristoph Hellwig /* calculate the first block number of the group */ 25433dcf5451SChristoph Hellwig static inline ext4_fsblk_t 25443dcf5451SChristoph Hellwig ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) 25453dcf5451SChristoph Hellwig { 25463dcf5451SChristoph Hellwig return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + 25473dcf5451SChristoph Hellwig le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); 25483dcf5451SChristoph Hellwig } 25493dcf5451SChristoph Hellwig 25503dcf5451SChristoph Hellwig /* 25513dcf5451SChristoph Hellwig * Special error return code only used by dx_probe() and its callers. 25523dcf5451SChristoph Hellwig */ 255336de9286STheodore Ts'o #define ERR_BAD_DX_DIR (-(MAX_ERRNO - 1)) 25543dcf5451SChristoph Hellwig 2555e08ac99fSArtem Blagodarenko /* htree levels for ext4 */ 2556e08ac99fSArtem Blagodarenko #define EXT4_HTREE_LEVEL_COMPAT 2 2557e08ac99fSArtem Blagodarenko #define EXT4_HTREE_LEVEL 3 2558e08ac99fSArtem Blagodarenko 2559e08ac99fSArtem Blagodarenko static inline int ext4_dir_htree_level(struct super_block *sb) 2560e08ac99fSArtem Blagodarenko { 2561e08ac99fSArtem Blagodarenko return ext4_has_feature_largedir(sb) ? 2562e08ac99fSArtem Blagodarenko EXT4_HTREE_LEVEL : EXT4_HTREE_LEVEL_COMPAT; 2563e08ac99fSArtem Blagodarenko } 2564e08ac99fSArtem Blagodarenko 25653dcf5451SChristoph Hellwig /* 2566bfff6873SLukas Czerner * Timeout and state flag for lazy initialization inode thread. 2567bfff6873SLukas Czerner */ 2568bfff6873SLukas Czerner #define EXT4_DEF_LI_WAIT_MULT 10 2569bfff6873SLukas Czerner #define EXT4_DEF_LI_MAX_START_DELAY 5 2570bfff6873SLukas Czerner #define EXT4_LAZYINIT_QUIT 0x0001 2571bfff6873SLukas Czerner #define EXT4_LAZYINIT_RUNNING 0x0002 2572bfff6873SLukas Czerner 2573bfff6873SLukas Czerner /* 2574bfff6873SLukas Czerner * Lazy inode table initialization info 2575bfff6873SLukas Czerner */ 2576bfff6873SLukas Czerner struct ext4_lazy_init { 2577bfff6873SLukas Czerner unsigned long li_state; 2578bfff6873SLukas Czerner struct list_head li_request_list; 2579bfff6873SLukas Czerner struct mutex li_list_mtx; 2580bfff6873SLukas Czerner }; 2581bfff6873SLukas Czerner 25823d392b26STheodore Ts'o enum ext4_li_mode { 25833d392b26STheodore Ts'o EXT4_LI_MODE_PREFETCH_BBITMAP, 25843d392b26STheodore Ts'o EXT4_LI_MODE_ITABLE, 25853d392b26STheodore Ts'o }; 25863d392b26STheodore Ts'o 2587bfff6873SLukas Czerner struct ext4_li_request { 2588bfff6873SLukas Czerner struct super_block *lr_super; 25893d392b26STheodore Ts'o enum ext4_li_mode lr_mode; 25903d392b26STheodore Ts'o ext4_group_t lr_first_not_zeroed; 2591bfff6873SLukas Czerner ext4_group_t lr_next_group; 2592bfff6873SLukas Czerner struct list_head lr_request; 2593bfff6873SLukas Czerner unsigned long lr_next_sched; 2594bfff6873SLukas Czerner unsigned long lr_timeout; 2595bfff6873SLukas Czerner }; 2596bfff6873SLukas Czerner 2597857ac889SLukas Czerner struct ext4_features { 2598857ac889SLukas Czerner struct kobject f_kobj; 2599857ac889SLukas Czerner struct completion f_kobj_unregister; 2600857ac889SLukas Czerner }; 2601857ac889SLukas Czerner 2602bfff6873SLukas Czerner /* 2603c5e06d10SJohann Lombardi * This structure will be used for multiple mount protection. It will be 2604c5e06d10SJohann Lombardi * written into the block number saved in the s_mmp_block field in the 2605c5e06d10SJohann Lombardi * superblock. Programs that check MMP should assume that if 2606c5e06d10SJohann Lombardi * SEQ_FSCK (or any unknown code above SEQ_MAX) is present then it is NOT safe 2607c5e06d10SJohann Lombardi * to use the filesystem, regardless of how old the timestamp is. 2608c5e06d10SJohann Lombardi */ 2609c5e06d10SJohann Lombardi #define EXT4_MMP_MAGIC 0x004D4D50U /* ASCII for MMP */ 2610c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U /* mmp_seq value for clean unmount */ 2611c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_FSCK 0xE24D4D50U /* mmp_seq value when being fscked */ 2612c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_MAX 0xE24D4D4FU /* maximum valid mmp_seq value */ 2613c5e06d10SJohann Lombardi 2614c5e06d10SJohann Lombardi struct mmp_struct { 2615c5e06d10SJohann Lombardi __le32 mmp_magic; /* Magic number for MMP */ 2616c5e06d10SJohann Lombardi __le32 mmp_seq; /* Sequence no. updated periodically */ 2617c5e06d10SJohann Lombardi 2618c5e06d10SJohann Lombardi /* 2619c5e06d10SJohann Lombardi * mmp_time, mmp_nodename & mmp_bdevname are only used for information 2620c5e06d10SJohann Lombardi * purposes and do not affect the correctness of the algorithm 2621c5e06d10SJohann Lombardi */ 2622c5e06d10SJohann Lombardi __le64 mmp_time; /* Time last updated */ 2623c5e06d10SJohann Lombardi char mmp_nodename[64]; /* Node which last updated MMP block */ 2624c5e06d10SJohann Lombardi char mmp_bdevname[32]; /* Bdev which last updated MMP block */ 2625c5e06d10SJohann Lombardi 2626c5e06d10SJohann Lombardi /* 2627c5e06d10SJohann Lombardi * mmp_check_interval is used to verify if the MMP block has been 2628c5e06d10SJohann Lombardi * updated on the block device. The value is updated based on the 2629c5e06d10SJohann Lombardi * maximum time to write the MMP block during an update cycle. 2630c5e06d10SJohann Lombardi */ 2631c5e06d10SJohann Lombardi __le16 mmp_check_interval; 2632c5e06d10SJohann Lombardi 2633c5e06d10SJohann Lombardi __le16 mmp_pad1; 2634e6153918SDarrick J. Wong __le32 mmp_pad2[226]; 2635e6153918SDarrick J. Wong __le32 mmp_checksum; /* crc32c(uuid+mmp_block) */ 2636c5e06d10SJohann Lombardi }; 2637c5e06d10SJohann Lombardi 2638c5e06d10SJohann Lombardi /* arguments passed to the mmp thread */ 2639c5e06d10SJohann Lombardi struct mmpd_data { 2640c5e06d10SJohann Lombardi struct buffer_head *bh; /* bh from initial read_mmp_block() */ 2641c5e06d10SJohann Lombardi struct super_block *sb; /* super block of the fs */ 2642c5e06d10SJohann Lombardi }; 2643c5e06d10SJohann Lombardi 2644c5e06d10SJohann Lombardi /* 2645c5e06d10SJohann Lombardi * Check interval multiplier 2646c5e06d10SJohann Lombardi * The MMP block is written every update interval and initially checked every 2647c5e06d10SJohann Lombardi * update interval x the multiplier (the value is then adapted based on the 2648c5e06d10SJohann Lombardi * write latency). The reason is that writes can be delayed under load and we 2649c5e06d10SJohann Lombardi * don't want readers to incorrectly assume that the filesystem is no longer 2650c5e06d10SJohann Lombardi * in use. 2651c5e06d10SJohann Lombardi */ 2652c5e06d10SJohann Lombardi #define EXT4_MMP_CHECK_MULT 2UL 2653c5e06d10SJohann Lombardi 2654c5e06d10SJohann Lombardi /* 2655c5e06d10SJohann Lombardi * Minimum interval for MMP checking in seconds. 2656c5e06d10SJohann Lombardi */ 2657c5e06d10SJohann Lombardi #define EXT4_MMP_MIN_CHECK_INTERVAL 5UL 2658c5e06d10SJohann Lombardi 2659c5e06d10SJohann Lombardi /* 2660c5e06d10SJohann Lombardi * Maximum interval for MMP checking in seconds. 2661c5e06d10SJohann Lombardi */ 2662c5e06d10SJohann Lombardi #define EXT4_MMP_MAX_CHECK_INTERVAL 300UL 2663c5e06d10SJohann Lombardi 2664c5e06d10SJohann Lombardi /* 26653dcf5451SChristoph Hellwig * Function prototypes 26663dcf5451SChristoph Hellwig */ 26673dcf5451SChristoph Hellwig 26683dcf5451SChristoph Hellwig /* 26693dcf5451SChristoph Hellwig * Ok, these declarations are also in <linux/kernel.h> but none of the 26703dcf5451SChristoph Hellwig * ext4 source programs needs to include it so they are duplicated here. 26713dcf5451SChristoph Hellwig */ 26723dcf5451SChristoph Hellwig # define NORET_TYPE /**/ 26733dcf5451SChristoph Hellwig # define ATTRIB_NORET __attribute__((noreturn)) 26743dcf5451SChristoph Hellwig # define NORET_AND noreturn, 26753dcf5451SChristoph Hellwig 2676498e5f24STheodore Ts'o /* bitmap.c */ 2677f6fb99caSTheodore Ts'o extern unsigned int ext4_count_free(char *bitmap, unsigned numchars); 267841a246d1SDarrick J. Wong void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 267941a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 268041a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 268141a246d1SDarrick J. Wong int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 268241a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 268341a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 2684fa77dcfaSDarrick J. Wong void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 2685fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 268679f1ba49STao Ma struct buffer_head *bh); 2687fa77dcfaSDarrick J. Wong int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 2688fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 268979f1ba49STao Ma struct buffer_head *bh); 2690498e5f24STheodore Ts'o 26913dcf5451SChristoph Hellwig /* balloc.c */ 2692bd86298eSLukas Czerner extern void ext4_get_group_no_and_offset(struct super_block *sb, 2693bd86298eSLukas Czerner ext4_fsblk_t blocknr, 2694bd86298eSLukas Czerner ext4_group_t *blockgrpp, 2695bd86298eSLukas Czerner ext4_grpblk_t *offsetp); 2696bd86298eSLukas Czerner extern ext4_group_t ext4_get_group_number(struct super_block *sb, 2697bd86298eSLukas Czerner ext4_fsblk_t block); 2698bd86298eSLukas Czerner 26993dcf5451SChristoph Hellwig extern unsigned int ext4_block_group(struct super_block *sb, 27003dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 27013dcf5451SChristoph Hellwig extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, 27023dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 27033dcf5451SChristoph Hellwig extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); 27043dcf5451SChristoph Hellwig extern unsigned long ext4_bg_num_gdb(struct super_block *sb, 27053dcf5451SChristoph Hellwig ext4_group_t group); 27067061eba7SAneesh Kumar K.V extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, 270755f020dbSAllison Henderson ext4_fsblk_t goal, 270855f020dbSAllison Henderson unsigned int flags, 270955f020dbSAllison Henderson unsigned long *count, 271055f020dbSAllison Henderson int *errp); 2711e7d5f315STheodore Ts'o extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi, 2712e7d5f315STheodore Ts'o s64 nclusters, unsigned int flags); 27135dee5437STheodore Ts'o extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *); 27143dcf5451SChristoph Hellwig extern void ext4_check_blocks_bitmap(struct super_block *); 27153dcf5451SChristoph Hellwig extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, 27163dcf5451SChristoph Hellwig ext4_group_t block_group, 27173dcf5451SChristoph Hellwig struct buffer_head ** bh); 27183dcf5451SChristoph Hellwig extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); 2719813e5727STheodore Ts'o 2720813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb, 2721cfd73237SAlex Zhuravlev ext4_group_t block_group, 2722cfd73237SAlex Zhuravlev bool ignore_locked); 2723813e5727STheodore Ts'o extern int ext4_wait_block_bitmap(struct super_block *sb, 2724813e5727STheodore Ts'o ext4_group_t block_group, 2725813e5727STheodore Ts'o struct buffer_head *bh); 2726813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, 2727bb23c20aSTheodore Ts'o ext4_group_t block_group); 2728cff1dfd7STheodore Ts'o extern unsigned ext4_free_clusters_after_init(struct super_block *sb, 2729fd034a84STheodore Ts'o ext4_group_t block_group, 2730fd034a84STheodore Ts'o struct ext4_group_desc *gdp); 2731f86186b4SEric Sandeen ext4_fsblk_t ext4_inode_to_goal_block(struct inode *); 27323dcf5451SChristoph Hellwig 27335298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 27341ae98e29SDaniel Rosenberg extern int ext4_fname_setup_ci_filename(struct inode *dir, 27353ae72562SGabriel Krisman Bertazi const struct qstr *iname, 27361ae98e29SDaniel Rosenberg struct ext4_filename *fname); 27373ae72562SGabriel Krisman Bertazi #endif 27383ae72562SGabriel Krisman Bertazi 2739b1241c8eSRitesh Harjani /* ext4 encryption related stuff goes here crypto.c */ 2740643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 2741b1241c8eSRitesh Harjani extern const struct fscrypt_operations ext4_cryptops; 2742b1241c8eSRitesh Harjani 27433030b59cSRitesh Harjani int ext4_fname_setup_filename(struct inode *dir, const struct qstr *iname, 27443030b59cSRitesh Harjani int lookup, struct ext4_filename *fname); 2745b01531dbSEric Biggers 27463030b59cSRitesh Harjani int ext4_fname_prepare_lookup(struct inode *dir, struct dentry *dentry, 27473030b59cSRitesh Harjani struct ext4_filename *fname); 2748b01531dbSEric Biggers 27493030b59cSRitesh Harjani void ext4_fname_free_filename(struct ext4_filename *fname); 2750a7550b30SJaegeuk Kim 275172f63f4aSRitesh Harjani int ext4_ioctl_get_encryption_pwsalt(struct file *filp, void __user *arg); 275272f63f4aSRitesh Harjani 2753b01531dbSEric Biggers #else /* !CONFIG_FS_ENCRYPTION */ 27545b643f9cSTheodore Ts'o static inline int ext4_fname_setup_filename(struct inode *dir, 27555b643f9cSTheodore Ts'o const struct qstr *iname, 2756b01531dbSEric Biggers int lookup, 2757b01531dbSEric Biggers struct ext4_filename *fname) 27585b643f9cSTheodore Ts'o { 27591ae98e29SDaniel Rosenberg int err = 0; 27605b643f9cSTheodore Ts'o fname->usr_fname = iname; 27615b643f9cSTheodore Ts'o fname->disk_name.name = (unsigned char *) iname->name; 27625b643f9cSTheodore Ts'o fname->disk_name.len = iname->len; 27633ae72562SGabriel Krisman Bertazi 27645298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 27651ae98e29SDaniel Rosenberg err = ext4_fname_setup_ci_filename(dir, iname, fname); 27663ae72562SGabriel Krisman Bertazi #endif 27673ae72562SGabriel Krisman Bertazi 27681ae98e29SDaniel Rosenberg return err; 27695b643f9cSTheodore Ts'o } 2770a7550b30SJaegeuk Kim 2771b01531dbSEric Biggers static inline int ext4_fname_prepare_lookup(struct inode *dir, 2772b01531dbSEric Biggers struct dentry *dentry, 2773b01531dbSEric Biggers struct ext4_filename *fname) 2774b01531dbSEric Biggers { 2775b01531dbSEric Biggers return ext4_fname_setup_filename(dir, &dentry->d_name, 1, fname); 2776b01531dbSEric Biggers } 2777b01531dbSEric Biggers 27783ae72562SGabriel Krisman Bertazi static inline void ext4_fname_free_filename(struct ext4_filename *fname) 27793ae72562SGabriel Krisman Bertazi { 27805298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 27813ae72562SGabriel Krisman Bertazi kfree(fname->cf_name.name); 27823ae72562SGabriel Krisman Bertazi fname->cf_name.name = NULL; 27833ae72562SGabriel Krisman Bertazi #endif 27843ae72562SGabriel Krisman Bertazi } 278572f63f4aSRitesh Harjani 278672f63f4aSRitesh Harjani static inline int ext4_ioctl_get_encryption_pwsalt(struct file *filp, 278772f63f4aSRitesh Harjani void __user *arg) 278872f63f4aSRitesh Harjani { 278972f63f4aSRitesh Harjani return -EOPNOTSUPP; 279072f63f4aSRitesh Harjani } 2791b01531dbSEric Biggers #endif /* !CONFIG_FS_ENCRYPTION */ 2792d5d0e8c7SMichael Halcrow 27933dcf5451SChristoph Hellwig /* dir.c */ 279460fd4da3STheodore Ts'o extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *, 2795f7c21177STheodore Ts'o struct file *, 27963dcf5451SChristoph Hellwig struct ext4_dir_entry_2 *, 2797226ba972STao Ma struct buffer_head *, char *, int, 2798226ba972STao Ma unsigned int); 2799226ba972STao Ma #define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \ 2800f7c21177STheodore Ts'o unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \ 2801226ba972STao Ma (de), (bh), (buf), (size), (offset))) 28023dcf5451SChristoph Hellwig extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, 28033dcf5451SChristoph Hellwig __u32 minor_hash, 28042f61830aSTheodore Ts'o struct ext4_dir_entry_2 *dirent, 2805a7550b30SJaegeuk Kim struct fscrypt_str *ent_name); 28063dcf5451SChristoph Hellwig extern void ext4_htree_free_dir_info(struct dir_private_info *p); 2807978fef91STao Ma extern int ext4_find_dest_de(struct inode *dir, struct inode *inode, 2808978fef91STao Ma struct buffer_head *bh, 2809978fef91STao Ma void *buf, int buf_size, 28105b643f9cSTheodore Ts'o struct ext4_filename *fname, 2811978fef91STao Ma struct ext4_dir_entry_2 **dest_de); 2812471fbbeaSDaniel Rosenberg void ext4_insert_dentry(struct inode *dir, struct inode *inode, 2813978fef91STao Ma struct ext4_dir_entry_2 *de, 2814978fef91STao Ma int buf_size, 28155b643f9cSTheodore Ts'o struct ext4_filename *fname); 2816978fef91STao Ma static inline void ext4_update_dx_flag(struct inode *inode) 2817978fef91STao Ma { 2818f902b216SJan Kara if (!ext4_has_feature_dir_index(inode->i_sb) && 2819f902b216SJan Kara ext4_test_inode_flag(inode, EXT4_INODE_INDEX)) { 282048a34311SJan Kara /* ext4_iget() should have caught this... */ 282148a34311SJan Kara WARN_ON_ONCE(ext4_has_feature_metadata_csum(inode->i_sb)); 2822978fef91STao Ma ext4_clear_inode_flag(inode, EXT4_INODE_INDEX); 2823978fef91STao Ma } 282448a34311SJan Kara } 2825d6006186SEric Biggers static const unsigned char ext4_filetype_table[] = { 282665d165d9STao Ma DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK 282765d165d9STao Ma }; 282865d165d9STao Ma 282965d165d9STao Ma static inline unsigned char get_dtype(struct super_block *sb, int filetype) 283065d165d9STao Ma { 2831e2b911c5SDarrick J. Wong if (!ext4_has_feature_filetype(sb) || filetype >= EXT4_FT_MAX) 283265d165d9STao Ma return DT_UNKNOWN; 283365d165d9STao Ma 283465d165d9STao Ma return ext4_filetype_table[filetype]; 283565d165d9STao Ma } 283640b163f1SDarrick J. Wong extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh, 283740b163f1SDarrick J. Wong void *buf, int buf_size); 28383dcf5451SChristoph Hellwig 28393dcf5451SChristoph Hellwig /* fsync.c */ 284002c24a82SJosef Bacik extern int ext4_sync_file(struct file *, loff_t, loff_t, int); 28413dcf5451SChristoph Hellwig 28423dcf5451SChristoph Hellwig /* hash.c */ 2843b886ee3eSGabriel Krisman Bertazi extern int ext4fs_dirhash(const struct inode *dir, const char *name, int len, 2844b886ee3eSGabriel Krisman Bertazi struct dx_hash_info *hinfo); 28453dcf5451SChristoph Hellwig 28463dcf5451SChristoph Hellwig /* ialloc.c */ 28478016e29fSHarshad Shirwadkar extern int ext4_mark_inode_used(struct super_block *sb, int ino); 284814f3db55SChristian Brauner extern struct inode *__ext4_new_inode(struct user_namespace *, handle_t *, 284914f3db55SChristian Brauner struct inode *, umode_t, 28505cb81dabSDmitry Monakhov const struct qstr *qstr, __u32 goal, 28511b917ed8STahsin Erdogan uid_t *owner, __u32 i_flags, 28521b917ed8STahsin Erdogan int handle_type, unsigned int line_no, 28531b917ed8STahsin Erdogan int nblocks); 28541139575aSTheodore Ts'o 28551b917ed8STahsin Erdogan #define ext4_new_inode(handle, dir, mode, qstr, goal, owner, i_flags) \ 285614f3db55SChristian Brauner __ext4_new_inode(&init_user_ns, (handle), (dir), (mode), (qstr), \ 285714f3db55SChristian Brauner (goal), (owner), i_flags, 0, 0, 0) 285814f3db55SChristian Brauner #define ext4_new_inode_start_handle(mnt_userns, dir, mode, qstr, goal, owner, \ 28591139575aSTheodore Ts'o type, nblocks) \ 286014f3db55SChristian Brauner __ext4_new_inode((mnt_userns), NULL, (dir), (mode), (qstr), (goal), (owner), \ 28611b917ed8STahsin Erdogan 0, (type), __LINE__, (nblocks)) 28621139575aSTheodore Ts'o 28631139575aSTheodore Ts'o 28643dcf5451SChristoph Hellwig extern void ext4_free_inode(handle_t *, struct inode *); 28653dcf5451SChristoph Hellwig extern struct inode * ext4_orphan_get(struct super_block *, unsigned long); 28663dcf5451SChristoph Hellwig extern unsigned long ext4_count_free_inodes(struct super_block *); 28673dcf5451SChristoph Hellwig extern unsigned long ext4_count_dirs(struct super_block *); 28683dcf5451SChristoph Hellwig extern void ext4_check_inodes_bitmap(struct super_block *); 286961d08673STheodore Ts'o extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap); 2870bfff6873SLukas Czerner extern int ext4_init_inode_table(struct super_block *sb, 2871bfff6873SLukas Czerner ext4_group_t group, int barrier); 2872813e5727STheodore Ts'o extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate); 28733dcf5451SChristoph Hellwig 28746866d7b3SHarshad Shirwadkar /* fast_commit.c */ 2875ce8c59d1SHarshad Shirwadkar int ext4_fc_info_show(struct seq_file *seq, void *v); 28766866d7b3SHarshad Shirwadkar void ext4_fc_init(struct super_block *sb, journal_t *journal); 2877aa75f4d3SHarshad Shirwadkar void ext4_fc_init_inode(struct inode *inode); 2878a80f7fcfSHarshad Shirwadkar void ext4_fc_track_range(handle_t *handle, struct inode *inode, ext4_lblk_t start, 2879aa75f4d3SHarshad Shirwadkar ext4_lblk_t end); 2880a80f7fcfSHarshad Shirwadkar void __ext4_fc_track_unlink(handle_t *handle, struct inode *inode, 2881a80f7fcfSHarshad Shirwadkar struct dentry *dentry); 2882a80f7fcfSHarshad Shirwadkar void __ext4_fc_track_link(handle_t *handle, struct inode *inode, 2883a80f7fcfSHarshad Shirwadkar struct dentry *dentry); 2884a80f7fcfSHarshad Shirwadkar void ext4_fc_track_unlink(handle_t *handle, struct dentry *dentry); 2885a80f7fcfSHarshad Shirwadkar void ext4_fc_track_link(handle_t *handle, struct dentry *dentry); 28868210bb29SHarshad Shirwadkar void __ext4_fc_track_create(handle_t *handle, struct inode *inode, 28878210bb29SHarshad Shirwadkar struct dentry *dentry); 2888a80f7fcfSHarshad Shirwadkar void ext4_fc_track_create(handle_t *handle, struct dentry *dentry); 2889a80f7fcfSHarshad Shirwadkar void ext4_fc_track_inode(handle_t *handle, struct inode *inode); 2890e85c81baSXin Yin void ext4_fc_mark_ineligible(struct super_block *sb, int reason, handle_t *handle); 2891aa75f4d3SHarshad Shirwadkar void ext4_fc_start_update(struct inode *inode); 2892aa75f4d3SHarshad Shirwadkar void ext4_fc_stop_update(struct inode *inode); 2893aa75f4d3SHarshad Shirwadkar void ext4_fc_del(struct inode *inode); 28948016e29fSHarshad Shirwadkar bool ext4_fc_replay_check_excluded(struct super_block *sb, ext4_fsblk_t block); 28958016e29fSHarshad Shirwadkar void ext4_fc_replay_cleanup(struct super_block *sb); 2896aa75f4d3SHarshad Shirwadkar int ext4_fc_commit(journal_t *journal, tid_t commit_tid); 2897aa75f4d3SHarshad Shirwadkar int __init ext4_fc_init_dentry_cache(void); 2898ab047d51SSebastian Andrzej Siewior void ext4_fc_destroy_dentry_cache(void); 2899599ea31dSXin Yin int ext4_fc_record_regions(struct super_block *sb, int ino, 2900599ea31dSXin Yin ext4_lblk_t lblk, ext4_fsblk_t pblk, 2901599ea31dSXin Yin int len, int replay); 2902aa75f4d3SHarshad Shirwadkar 29033dcf5451SChristoph Hellwig /* mballoc.c */ 2904247dbed8SChristoph Hellwig extern const struct seq_operations ext4_mb_seq_groups_ops; 2905f68f4063SHarshad Shirwadkar extern const struct seq_operations ext4_mb_seq_structs_summary_ops; 29063dcf5451SChristoph Hellwig extern long ext4_mb_stats; 29073dcf5451SChristoph Hellwig extern long ext4_mb_max_to_scan; 2908a6c75eafSHarshad Shirwadkar extern int ext4_seq_mb_stats_show(struct seq_file *seq, void *offset); 29099d99012fSAkira Fujita extern int ext4_mb_init(struct super_block *); 29103dcf5451SChristoph Hellwig extern int ext4_mb_release(struct super_block *); 29113dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, 29123dcf5451SChristoph Hellwig struct ext4_allocation_request *, int *); 29133dcf5451SChristoph Hellwig extern int ext4_mb_reserve_blocks(struct super_block *, int); 291427bc446eSbrookxu extern void ext4_discard_preallocations(struct inode *, unsigned int); 29155dabfc78STheodore Ts'o extern int __init ext4_init_mballoc(void); 29165dabfc78STheodore Ts'o extern void ext4_exit_mballoc(void); 29173d392b26STheodore Ts'o extern ext4_group_t ext4_mb_prefetch(struct super_block *sb, 29183d392b26STheodore Ts'o ext4_group_t group, 29193d392b26STheodore Ts'o unsigned int nr, int *cnt); 29203d392b26STheodore Ts'o extern void ext4_mb_prefetch_fini(struct super_block *sb, ext4_group_t group, 29213d392b26STheodore Ts'o unsigned int nr); 29223d392b26STheodore Ts'o 292344338711STheodore Ts'o extern void ext4_free_blocks(handle_t *handle, struct inode *inode, 2924e6362609STheodore Ts'o struct buffer_head *bh, ext4_fsblk_t block, 2925e6362609STheodore Ts'o unsigned long count, int flags); 292628623c2fSTheodore Ts'o extern int ext4_mb_alloc_groupinfo(struct super_block *sb, 292728623c2fSTheodore Ts'o ext4_group_t ngroups); 2928920313a7SAneesh Kumar K.V extern int ext4_mb_add_groupinfo(struct super_block *sb, 29295f21b0e6SFrederic Bohe ext4_group_t i, struct ext4_group_desc *desc); 2930cc7365dfSYongqiang Yang extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, 29312846e820SAmir Goldstein ext4_fsblk_t block, unsigned long count); 29327360d173SLukas Czerner extern int ext4_trim_fs(struct super_block *, struct fstrim_range *); 2933a0154344SDaeho Jeong extern void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid); 29348016e29fSHarshad Shirwadkar extern void ext4_mb_mark_bb(struct super_block *sb, ext4_fsblk_t block, 29358016e29fSHarshad Shirwadkar int len, int state); 29367360d173SLukas Czerner 29373dcf5451SChristoph Hellwig /* inode.c */ 29388016e29fSHarshad Shirwadkar void ext4_inode_csum_set(struct inode *inode, struct ext4_inode *raw, 29398016e29fSHarshad Shirwadkar struct ext4_inode_info *ei); 2940f348c252STheodore Ts'o int ext4_inode_is_fast_symlink(struct inode *inode); 294110560082STheodore Ts'o struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int); 29421c215028STheodore Ts'o struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int); 29439699d4f9STahsin Erdogan int ext4_bread_batch(struct inode *inode, ext4_lblk_t block, int bh_count, 29449699d4f9STahsin Erdogan bool wait, struct buffer_head **bhs); 2945705965bdSJan Kara int ext4_get_block_unwritten(struct inode *inode, sector_t iblock, 2946f19d5870STao Ma struct buffer_head *bh_result, int create); 29476873fa0dSEric Sandeen int ext4_get_block(struct inode *inode, sector_t iblock, 29486873fa0dSEric Sandeen struct buffer_head *bh_result, int create); 29499c3569b5STao Ma int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, 29509c3569b5STao Ma struct buffer_head *bh, int create); 2951f19d5870STao Ma int ext4_walk_page_buffers(handle_t *handle, 2952188c299eSJan Kara struct inode *inode, 2953f19d5870STao Ma struct buffer_head *head, 2954f19d5870STao Ma unsigned from, 2955f19d5870STao Ma unsigned to, 2956f19d5870STao Ma int *partial, 2957188c299eSJan Kara int (*fn)(handle_t *handle, struct inode *inode, 2958f19d5870STao Ma struct buffer_head *bh)); 2959188c299eSJan Kara int do_journal_get_write_access(handle_t *handle, struct inode *inode, 2960f19d5870STao Ma struct buffer_head *bh); 29619c3569b5STao Ma #define FALL_BACK_TO_NONDELALLOC 1 29629c3569b5STao Ma #define CONVERT_INLINE_DATA 2 29633dcf5451SChristoph Hellwig 29648a363970STheodore Ts'o typedef enum { 29658a363970STheodore Ts'o EXT4_IGET_NORMAL = 0, 29668a363970STheodore Ts'o EXT4_IGET_SPECIAL = 0x0001, /* OK to iget a system inode */ 2967*63b1e9bcSBaokun Li EXT4_IGET_HANDLE = 0x0002, /* Inode # is from a handle */ 2968*63b1e9bcSBaokun Li EXT4_IGET_BAD = 0x0004 /* Allow to iget a bad inode */ 29698a363970STheodore Ts'o } ext4_iget_flags; 29708a363970STheodore Ts'o 29718a363970STheodore Ts'o extern struct inode *__ext4_iget(struct super_block *sb, unsigned long ino, 29728a363970STheodore Ts'o ext4_iget_flags flags, const char *function, 29738a363970STheodore Ts'o unsigned int line); 29748a363970STheodore Ts'o 29758a363970STheodore Ts'o #define ext4_iget(sb, ino, flags) \ 29768a363970STheodore Ts'o __ext4_iget((sb), (ino), (flags), __func__, __LINE__) 29778a363970STheodore Ts'o 2978a9185b41SChristoph Hellwig extern int ext4_write_inode(struct inode *, struct writeback_control *); 2979549c7297SChristian Brauner extern int ext4_setattr(struct user_namespace *, struct dentry *, 2980549c7297SChristian Brauner struct iattr *); 29818434ef1dSEric Biggers extern u32 ext4_dio_alignment(struct inode *inode); 2982549c7297SChristian Brauner extern int ext4_getattr(struct user_namespace *, const struct path *, 2983549c7297SChristian Brauner struct kstat *, u32, unsigned int); 29840930fcc1SAl Viro extern void ext4_evict_inode(struct inode *); 29850930fcc1SAl Viro extern void ext4_clear_inode(struct inode *); 2986549c7297SChristian Brauner extern int ext4_file_getattr(struct user_namespace *, const struct path *, 2987549c7297SChristian Brauner struct kstat *, u32, unsigned int); 29883dcf5451SChristoph Hellwig extern int ext4_sync_inode(handle_t *, struct inode *); 2989aa385729SChristoph Hellwig extern void ext4_dirty_inode(struct inode *, int); 29903dcf5451SChristoph Hellwig extern int ext4_change_inode_journal_flag(struct inode *, int); 29913dcf5451SChristoph Hellwig extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); 29928016e29fSHarshad Shirwadkar extern int ext4_get_fc_inode_loc(struct super_block *sb, unsigned long ino, 29938016e29fSHarshad Shirwadkar struct ext4_iloc *iloc); 2994a361293fSJan Kara extern int ext4_inode_attach_jinode(struct inode *inode); 299591ef4cafSDuane Griffin extern int ext4_can_truncate(struct inode *inode); 29962c98eb5eSTheodore Ts'o extern int ext4_truncate(struct inode *); 2997430657b6SRoss Zwisler extern int ext4_break_layouts(struct inode *); 2998ad5cd4f4SDarrick J. Wong extern int ext4_punch_hole(struct file *file, loff_t offset, loff_t length); 2999043546e4SIra Weiny extern void ext4_set_inode_flags(struct inode *, bool init); 3000ccd2506bSTheodore Ts'o extern int ext4_alloc_da_blocks(struct inode *inode); 30013dcf5451SChristoph Hellwig extern void ext4_set_aops(struct inode *inode); 30023dcf5451SChristoph Hellwig extern int ext4_writepage_trans_blocks(struct inode *); 3003f3bd1f3fSMingming Cao extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); 3004a87dd18cSLukas Czerner extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode, 3005a87dd18cSLukas Czerner loff_t lstart, loff_t lend); 3006401b25aaSSouptick Joarder extern vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf); 3007a9e7f447SDmitry Monakhov extern qsize_t *ext4_get_reserved_space(struct inode *inode); 3008040cb378SLi Xi extern int ext4_get_projid(struct inode *inode, kprojid_t *projid); 3009f456767dSEric Whitney extern void ext4_da_release_space(struct inode *inode, int to_free); 30105f634d06SAneesh Kumar K.V extern void ext4_da_update_reserve_space(struct inode *inode, 30115f634d06SAneesh Kumar K.V int used, int quota_claim); 301253085facSJan Kara extern int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk, 301353085facSJan Kara ext4_fsblk_t pblk, ext4_lblk_t len); 3014dae1e52cSAmir Goldstein 3015dae1e52cSAmir Goldstein /* indirect.c */ 3016dae1e52cSAmir Goldstein extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, 3017dae1e52cSAmir Goldstein struct ext4_map_blocks *map, int flags); 3018fa55a0edSJan Kara extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks); 3019819c4920STheodore Ts'o extern void ext4_ind_truncate(handle_t *, struct inode *inode); 30204f579ae7SLukas Czerner extern int ext4_ind_remove_space(handle_t *handle, struct inode *inode, 30214f579ae7SLukas Czerner ext4_lblk_t start, ext4_lblk_t end); 3022ff9893dcSAmir Goldstein 30233dcf5451SChristoph Hellwig /* ioctl.c */ 30243dcf5451SChristoph Hellwig extern long ext4_ioctl(struct file *, unsigned int, unsigned long); 30253dcf5451SChristoph Hellwig extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long); 30264db5c2e6SMiklos Szeredi int ext4_fileattr_set(struct user_namespace *mnt_userns, 30274db5c2e6SMiklos Szeredi struct dentry *dentry, struct fileattr *fa); 30284db5c2e6SMiklos Szeredi int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa); 30298016e29fSHarshad Shirwadkar extern void ext4_reset_inode_seed(struct inode *inode); 3030827891a3STheodore Ts'o int ext4_update_overhead(struct super_block *sb, bool force); 30313dcf5451SChristoph Hellwig 30323dcf5451SChristoph Hellwig /* migrate.c */ 30332a43a878SAneesh Kumar K.V extern int ext4_ext_migrate(struct inode *); 30340d14b098SLukas Czerner extern int ext4_ind_migrate(struct inode *inode); 30353d0518f4SWei Yongjun 30363dcf5451SChristoph Hellwig /* namei.c */ 30378016e29fSHarshad Shirwadkar extern int ext4_init_new_dir(handle_t *handle, struct inode *dir, 30388016e29fSHarshad Shirwadkar struct inode *inode); 3039f036adb3STheodore Ts'o extern int ext4_dirblock_csum_verify(struct inode *inode, 3040f036adb3STheodore Ts'o struct buffer_head *bh); 30413dcf5451SChristoph Hellwig extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, 30423dcf5451SChristoph Hellwig __u32 start_minor_hash, __u32 *next_hash); 30435b643f9cSTheodore Ts'o extern int ext4_search_dir(struct buffer_head *bh, 30447335cd3bSTao Ma char *search_buf, 30457335cd3bSTao Ma int buf_size, 30467335cd3bSTao Ma struct inode *dir, 30475b643f9cSTheodore Ts'o struct ext4_filename *fname, 30487335cd3bSTao Ma unsigned int offset, 30497335cd3bSTao Ma struct ext4_dir_entry_2 **res_dir); 30502fe34d29SKyoungho Koo extern int ext4_generic_delete_entry(struct inode *dir, 305105019a9eSTao Ma struct ext4_dir_entry_2 *de_del, 305205019a9eSTao Ma struct buffer_head *bh, 305305019a9eSTao Ma void *entry_buf, 305405019a9eSTao Ma int buf_size, 305505019a9eSTao Ma int csum_size); 3056a7550b30SJaegeuk Kim extern bool ext4_empty_dir(struct inode *inode); 30573dcf5451SChristoph Hellwig 30583dcf5451SChristoph Hellwig /* resize.c */ 30591d0c3924STheodore Ts'o extern void ext4_kvfree_array_rcu(void *to_free); 30603dcf5451SChristoph Hellwig extern int ext4_group_add(struct super_block *sb, 30613dcf5451SChristoph Hellwig struct ext4_new_group_data *input); 30623dcf5451SChristoph Hellwig extern int ext4_group_extend(struct super_block *sb, 30633dcf5451SChristoph Hellwig struct ext4_super_block *es, 30643dcf5451SChristoph Hellwig ext4_fsblk_t n_blocks_count); 306519c5246dSYongqiang Yang extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count); 3066bbc605cdSLukas Czerner extern unsigned int ext4_list_backups(struct super_block *sb, 3067bbc605cdSLukas Czerner unsigned int *three, unsigned int *five, 3068bbc605cdSLukas Czerner unsigned int *seven); 30693dcf5451SChristoph Hellwig 30703dcf5451SChristoph Hellwig /* super.c */ 3071fb265c9cSTheodore Ts'o extern struct buffer_head *ext4_sb_bread(struct super_block *sb, 307267c0f556SBart Van Assche sector_t block, blk_opf_t op_flags); 30738394a6abSzhangyi (F) extern struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 30748394a6abSzhangyi (F) sector_t block); 307567c0f556SBart Van Assche extern void ext4_read_bh_nowait(struct buffer_head *bh, blk_opf_t op_flags, 3076fa491b14Szhangyi (F) bh_end_io_t *end_io); 307767c0f556SBart Van Assche extern int ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, 3078fa491b14Szhangyi (F) bh_end_io_t *end_io); 307967c0f556SBart Van Assche extern int ext4_read_bh_lock(struct buffer_head *bh, blk_opf_t op_flags, bool wait); 30805df1d412Szhangyi (F) extern void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block); 3081ebd173beSTheodore Ts'o extern int ext4_seq_options_show(struct seq_file *seq, void *offset); 3082952fc18eSTheodore Ts'o extern int ext4_calculate_overhead(struct super_block *sb); 3083bbc605cdSLukas Czerner extern __le32 ext4_superblock_csum(struct super_block *sb, 3084bbc605cdSLukas Czerner struct ext4_super_block *es); 308506db49e6STheodore Ts'o extern void ext4_superblock_csum_set(struct super_block *sb); 3086117fff10STheodore Ts'o extern int ext4_alloc_flex_bg_array(struct super_block *sb, 3087117fff10STheodore Ts'o ext4_group_t ngroup); 3088722887ddSTheodore Ts'o extern const char *ext4_decode_error(struct super_block *sb, int errno, 3089722887ddSTheodore Ts'o char nbuf[16]); 3090db79e6d1SWang Shilong extern void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 3091db79e6d1SWang Shilong ext4_group_t block_group, 3092db79e6d1SWang Shilong unsigned int flags); 3093e7c96e8eSJoe Perches 3094014c9caaSJan Kara extern __printf(7, 8) 3095014c9caaSJan Kara void __ext4_error(struct super_block *, const char *, unsigned int, bool, 3096014c9caaSJan Kara int, __u64, const char *, ...); 309754d3adbcSTheodore Ts'o extern __printf(6, 7) 309854d3adbcSTheodore Ts'o void __ext4_error_inode(struct inode *, const char *, unsigned int, 309954d3adbcSTheodore Ts'o ext4_fsblk_t, int, const char *, ...); 3100b9075fa9SJoe Perches extern __printf(5, 6) 3101e7c96e8eSJoe Perches void __ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t, 3102b9075fa9SJoe Perches const char *, ...); 3103c398eda0STheodore Ts'o extern void __ext4_std_error(struct super_block *, const char *, 3104c398eda0STheodore Ts'o unsigned int, int); 3105b9075fa9SJoe Perches extern __printf(4, 5) 3106b9075fa9SJoe Perches void __ext4_warning(struct super_block *, const char *, unsigned int, 3107b9075fa9SJoe Perches const char *, ...); 3108b03a2f7eSAndreas Dilger extern __printf(4, 5) 3109b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 3110b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...); 3111b9075fa9SJoe Perches extern __printf(3, 4) 3112e7c96e8eSJoe Perches void __ext4_msg(struct super_block *, const char *, const char *, ...); 3113c5e06d10SJohann Lombardi extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp, 3114c5e06d10SJohann Lombardi const char *, unsigned int, const char *); 3115b9075fa9SJoe Perches extern __printf(7, 8) 3116b9075fa9SJoe Perches void __ext4_grp_locked_error(const char *, unsigned int, 3117b9075fa9SJoe Perches struct super_block *, ext4_group_t, 3118b9075fa9SJoe Perches unsigned long, ext4_fsblk_t, 3119b9075fa9SJoe Perches const char *, ...); 3120e7c96e8eSJoe Perches 3121b03a2f7eSAndreas Dilger #define EXT4_ERROR_INODE(inode, fmt, a...) \ 3122b03a2f7eSAndreas Dilger ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a) 3123b03a2f7eSAndreas Dilger 312454d3adbcSTheodore Ts'o #define EXT4_ERROR_INODE_ERR(inode, err, fmt, a...) \ 312554d3adbcSTheodore Ts'o __ext4_error_inode((inode), __func__, __LINE__, 0, (err), (fmt), ## a) 312654d3adbcSTheodore Ts'o 312754d3adbcSTheodore Ts'o #define ext4_error_inode_block(inode, block, err, fmt, a...) \ 312854d3adbcSTheodore Ts'o __ext4_error_inode((inode), __func__, __LINE__, (block), (err), \ 312954d3adbcSTheodore Ts'o (fmt), ## a) 3130b03a2f7eSAndreas Dilger 3131b03a2f7eSAndreas Dilger #define EXT4_ERROR_FILE(file, block, fmt, a...) \ 3132b03a2f7eSAndreas Dilger ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a) 3133b03a2f7eSAndreas Dilger 3134014c9caaSJan Kara #define ext4_abort(sb, err, fmt, a...) \ 3135014c9caaSJan Kara __ext4_error((sb), __func__, __LINE__, true, (err), 0, (fmt), ## a) 3136014c9caaSJan Kara 3137e7c96e8eSJoe Perches #ifdef CONFIG_PRINTK 3138e7c96e8eSJoe Perches 3139e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 314054d3adbcSTheodore Ts'o __ext4_error_inode(inode, func, line, block, 0, fmt, ##__VA_ARGS__) 314154d3adbcSTheodore Ts'o #define ext4_error_inode_err(inode, func, line, block, err, fmt, ...) \ 314254d3adbcSTheodore Ts'o __ext4_error_inode((inode), (func), (line), (block), \ 314354d3adbcSTheodore Ts'o (err), (fmt), ##__VA_ARGS__) 3144e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 3145e7c96e8eSJoe Perches __ext4_error_file(file, func, line, block, fmt, ##__VA_ARGS__) 3146e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 3147014c9caaSJan Kara __ext4_error((sb), __func__, __LINE__, false, 0, 0, (fmt), \ 3148014c9caaSJan Kara ##__VA_ARGS__) 314954d3adbcSTheodore Ts'o #define ext4_error_err(sb, err, fmt, ...) \ 3150014c9caaSJan Kara __ext4_error((sb), __func__, __LINE__, false, (err), 0, (fmt), \ 3151014c9caaSJan Kara ##__VA_ARGS__) 3152e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 3153e7c96e8eSJoe Perches __ext4_warning(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 3154b03a2f7eSAndreas Dilger #define ext4_warning_inode(inode, fmt, ...) \ 3155b03a2f7eSAndreas Dilger __ext4_warning_inode(inode, __func__, __LINE__, fmt, ##__VA_ARGS__) 3156e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 3157e7c96e8eSJoe Perches __ext4_msg(sb, level, fmt, ##__VA_ARGS__) 3158e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 3159e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, __func__, __LINE__, msg) 3160e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 3161e7c96e8eSJoe Perches __ext4_grp_locked_error(__func__, __LINE__, sb, grp, ino, block, \ 3162e7c96e8eSJoe Perches fmt, ##__VA_ARGS__) 3163e7c96e8eSJoe Perches 3164e7c96e8eSJoe Perches #else 3165e7c96e8eSJoe Perches 3166e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 3167e7c96e8eSJoe Perches do { \ 3168e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 316954d3adbcSTheodore Ts'o __ext4_error_inode(inode, "", 0, block, 0, " "); \ 317054d3adbcSTheodore Ts'o } while (0) 317154d3adbcSTheodore Ts'o #define ext4_error_inode_err(inode, func, line, block, err, fmt, ...) \ 317254d3adbcSTheodore Ts'o do { \ 317354d3adbcSTheodore Ts'o no_printk(fmt, ##__VA_ARGS__); \ 317454d3adbcSTheodore Ts'o __ext4_error_inode(inode, "", 0, block, err, " "); \ 3175e7c96e8eSJoe Perches } while (0) 3176e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 3177e7c96e8eSJoe Perches do { \ 3178e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 3179e7c96e8eSJoe Perches __ext4_error_file(file, "", 0, block, " "); \ 3180e7c96e8eSJoe Perches } while (0) 3181e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 3182e7c96e8eSJoe Perches do { \ 3183e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 3184014c9caaSJan Kara __ext4_error(sb, "", 0, false, 0, 0, " "); \ 3185e7c96e8eSJoe Perches } while (0) 318654d3adbcSTheodore Ts'o #define ext4_error_err(sb, err, fmt, ...) \ 3187e7c96e8eSJoe Perches do { \ 3188e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 3189014c9caaSJan Kara __ext4_error(sb, "", 0, false, err, 0, " "); \ 3190e7c96e8eSJoe Perches } while (0) 3191e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 3192e7c96e8eSJoe Perches do { \ 3193e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 3194e7c96e8eSJoe Perches __ext4_warning(sb, "", 0, " "); \ 3195e7c96e8eSJoe Perches } while (0) 3196b03a2f7eSAndreas Dilger #define ext4_warning_inode(inode, fmt, ...) \ 3197b03a2f7eSAndreas Dilger do { \ 3198b03a2f7eSAndreas Dilger no_printk(fmt, ##__VA_ARGS__); \ 3199b03a2f7eSAndreas Dilger __ext4_warning_inode(inode, "", 0, " "); \ 3200b03a2f7eSAndreas Dilger } while (0) 3201e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 3202e7c96e8eSJoe Perches do { \ 3203e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 3204e7c96e8eSJoe Perches __ext4_msg(sb, "", " "); \ 3205e7c96e8eSJoe Perches } while (0) 3206e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 3207e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, "", 0, "") 3208e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 3209e7c96e8eSJoe Perches do { \ 3210e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 3211e7c96e8eSJoe Perches __ext4_grp_locked_error("", 0, sb, grp, ino, block, " "); \ 3212e7c96e8eSJoe Perches } while (0) 3213e7c96e8eSJoe Perches 3214e7c96e8eSJoe Perches #endif 3215e7c96e8eSJoe Perches 32163dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 32173dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 32183dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 32193dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 32203dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_table(struct super_block *sb, 32213dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 3222021b65bbSTheodore Ts'o extern __u32 ext4_free_group_clusters(struct super_block *sb, 3223560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 3224560671a0SAneesh Kumar K.V extern __u32 ext4_free_inodes_count(struct super_block *sb, 3225560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 3226560671a0SAneesh Kumar K.V extern __u32 ext4_used_dirs_count(struct super_block *sb, 3227560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 3228560671a0SAneesh Kumar K.V extern __u32 ext4_itable_unused_count(struct super_block *sb, 3229560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 32303dcf5451SChristoph Hellwig extern void ext4_block_bitmap_set(struct super_block *sb, 32313dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 32323dcf5451SChristoph Hellwig extern void ext4_inode_bitmap_set(struct super_block *sb, 32333dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 32343dcf5451SChristoph Hellwig extern void ext4_inode_table_set(struct super_block *sb, 32353dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 3236021b65bbSTheodore Ts'o extern void ext4_free_group_clusters_set(struct super_block *sb, 3237021b65bbSTheodore Ts'o struct ext4_group_desc *bg, 3238021b65bbSTheodore Ts'o __u32 count); 3239560671a0SAneesh Kumar K.V extern void ext4_free_inodes_set(struct super_block *sb, 3240560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 3241560671a0SAneesh Kumar K.V extern void ext4_used_dirs_set(struct super_block *sb, 3242560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 3243560671a0SAneesh Kumar K.V extern void ext4_itable_unused_set(struct super_block *sb, 3244560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 3245feb0ab32SDarrick J. Wong extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group, 3246bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 3247feb0ab32SDarrick J. Wong extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group, 3248bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 32497f511862STheodore Ts'o extern int ext4_register_li_request(struct super_block *sb, 32507f511862STheodore Ts'o ext4_group_t first_not_zeroed); 32513dcf5451SChristoph Hellwig 32529aa5d32bSDmitry Monakhov static inline int ext4_has_metadata_csum(struct super_block *sb) 32539aa5d32bSDmitry Monakhov { 3254e2b911c5SDarrick J. Wong WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) && 32559aa5d32bSDmitry Monakhov !EXT4_SB(sb)->s_chksum_driver); 32569aa5d32bSDmitry Monakhov 3257dec214d0STahsin Erdogan return ext4_has_feature_metadata_csum(sb) && 3258dec214d0STahsin Erdogan (EXT4_SB(sb)->s_chksum_driver != NULL); 32599aa5d32bSDmitry Monakhov } 3260dec214d0STahsin Erdogan 3261dec214d0STahsin Erdogan static inline int ext4_has_group_desc_csum(struct super_block *sb) 3262dec214d0STahsin Erdogan { 3263dec214d0STahsin Erdogan return ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb); 3264dec214d0STahsin Erdogan } 3265dec214d0STahsin Erdogan 326681e8c3c5SPetr Malat #define ext4_read_incompat_64bit_val(es, name) \ 326781e8c3c5SPetr Malat (((es)->s_feature_incompat & cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT) \ 326881e8c3c5SPetr Malat ? (ext4_fsblk_t)le32_to_cpu(es->name##_hi) << 32 : 0) | \ 326981e8c3c5SPetr Malat le32_to_cpu(es->name##_lo)) 327081e8c3c5SPetr Malat 32713dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) 32723dcf5451SChristoph Hellwig { 327381e8c3c5SPetr Malat return ext4_read_incompat_64bit_val(es, s_blocks_count); 32743dcf5451SChristoph Hellwig } 32753dcf5451SChristoph Hellwig 32763dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) 32773dcf5451SChristoph Hellwig { 327881e8c3c5SPetr Malat return ext4_read_incompat_64bit_val(es, s_r_blocks_count); 32793dcf5451SChristoph Hellwig } 32803dcf5451SChristoph Hellwig 32813dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) 32823dcf5451SChristoph Hellwig { 328381e8c3c5SPetr Malat return ext4_read_incompat_64bit_val(es, s_free_blocks_count); 32843dcf5451SChristoph Hellwig } 32853dcf5451SChristoph Hellwig 32863dcf5451SChristoph Hellwig static inline void ext4_blocks_count_set(struct ext4_super_block *es, 32873dcf5451SChristoph Hellwig ext4_fsblk_t blk) 32883dcf5451SChristoph Hellwig { 32893dcf5451SChristoph Hellwig es->s_blocks_count_lo = cpu_to_le32((u32)blk); 32903dcf5451SChristoph Hellwig es->s_blocks_count_hi = cpu_to_le32(blk >> 32); 32913dcf5451SChristoph Hellwig } 32923dcf5451SChristoph Hellwig 32933dcf5451SChristoph Hellwig static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, 32943dcf5451SChristoph Hellwig ext4_fsblk_t blk) 32953dcf5451SChristoph Hellwig { 32963dcf5451SChristoph Hellwig es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); 32973dcf5451SChristoph Hellwig es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); 32983dcf5451SChristoph Hellwig } 32993dcf5451SChristoph Hellwig 33003dcf5451SChristoph Hellwig static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, 33013dcf5451SChristoph Hellwig ext4_fsblk_t blk) 33023dcf5451SChristoph Hellwig { 33033dcf5451SChristoph Hellwig es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); 33043dcf5451SChristoph Hellwig es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); 33053dcf5451SChristoph Hellwig } 33063dcf5451SChristoph Hellwig 3307e08ac99fSArtem Blagodarenko static inline loff_t ext4_isize(struct super_block *sb, 3308e08ac99fSArtem Blagodarenko struct ext4_inode *raw_inode) 33093dcf5451SChristoph Hellwig { 3310e08ac99fSArtem Blagodarenko if (ext4_has_feature_largedir(sb) || 3311e08ac99fSArtem Blagodarenko S_ISREG(le16_to_cpu(raw_inode->i_mode))) 33123dcf5451SChristoph Hellwig return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | 33133dcf5451SChristoph Hellwig le32_to_cpu(raw_inode->i_size_lo); 3314e08ac99fSArtem Blagodarenko 331506a279d6STheodore Ts'o return (loff_t) le32_to_cpu(raw_inode->i_size_lo); 33163dcf5451SChristoph Hellwig } 33173dcf5451SChristoph Hellwig 33183dcf5451SChristoph Hellwig static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) 33193dcf5451SChristoph Hellwig { 33203dcf5451SChristoph Hellwig raw_inode->i_size_lo = cpu_to_le32(i_size); 33213dcf5451SChristoph Hellwig raw_inode->i_size_high = cpu_to_le32(i_size >> 32); 33223dcf5451SChristoph Hellwig } 33233dcf5451SChristoph Hellwig 33243dcf5451SChristoph Hellwig static inline 33253dcf5451SChristoph Hellwig struct ext4_group_info *ext4_get_group_info(struct super_block *sb, 33263dcf5451SChristoph Hellwig ext4_group_t group) 33273dcf5451SChristoph Hellwig { 3328df3da4eaSSuraj Jitindar Singh struct ext4_group_info **grp_info; 33293dcf5451SChristoph Hellwig long indexv, indexh; 33302f2e09ebSTheodore Ts'o BUG_ON(group >= EXT4_SB(sb)->s_groups_count); 33313dcf5451SChristoph Hellwig indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); 33323dcf5451SChristoph Hellwig indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); 3333df3da4eaSSuraj Jitindar Singh grp_info = sbi_array_rcu_deref(EXT4_SB(sb), s_group_info, indexv); 3334df3da4eaSSuraj Jitindar Singh return grp_info[indexh]; 33353dcf5451SChristoph Hellwig } 33363dcf5451SChristoph Hellwig 33378df9675fSTheodore Ts'o /* 33388df9675fSTheodore Ts'o * Reading s_groups_count requires using smp_rmb() afterwards. See 33398df9675fSTheodore Ts'o * the locking protocol documented in the comments of ext4_group_add() 33408df9675fSTheodore Ts'o * in resize.c 33418df9675fSTheodore Ts'o */ 33428df9675fSTheodore Ts'o static inline ext4_group_t ext4_get_groups_count(struct super_block *sb) 33438df9675fSTheodore Ts'o { 33448df9675fSTheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 33458df9675fSTheodore Ts'o 33468df9675fSTheodore Ts'o smp_rmb(); 33478df9675fSTheodore Ts'o return ngroups; 33488df9675fSTheodore Ts'o } 33493dcf5451SChristoph Hellwig 3350772cb7c8SJose R. Santos static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, 3351772cb7c8SJose R. Santos ext4_group_t block_group) 3352772cb7c8SJose R. Santos { 3353772cb7c8SJose R. Santos return block_group >> sbi->s_log_groups_per_flex; 3354772cb7c8SJose R. Santos } 3355772cb7c8SJose R. Santos 3356772cb7c8SJose R. Santos static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi) 3357772cb7c8SJose R. Santos { 3358772cb7c8SJose R. Santos return 1 << sbi->s_log_groups_per_flex; 3359772cb7c8SJose R. Santos } 3360772cb7c8SJose R. Santos 33613dcf5451SChristoph Hellwig #define ext4_std_error(sb, errno) \ 33623dcf5451SChristoph Hellwig do { \ 33633dcf5451SChristoph Hellwig if ((errno)) \ 3364c398eda0STheodore Ts'o __ext4_std_error((sb), __func__, __LINE__, (errno)); \ 33653dcf5451SChristoph Hellwig } while (0) 33663dcf5451SChristoph Hellwig 3367a30d542aSAneesh Kumar K.V #ifdef CONFIG_SMP 3368df55c99dSTheodore Ts'o /* Each CPU can accumulate percpu_counter_batch clusters in their local 3369df55c99dSTheodore Ts'o * counters. So we need to make sure we have free clusters more 3370179f7ebfSEric Dumazet * than percpu_counter_batch * nr_cpu_ids. Also add a window of 4 times. 3371a30d542aSAneesh Kumar K.V */ 3372df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids)) 3373a30d542aSAneesh Kumar K.V #else 3374df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK 0 3375a30d542aSAneesh Kumar K.V #endif 3376a30d542aSAneesh Kumar K.V 3377f340b3d9Shongnanli /* Update i_disksize. Requires i_rwsem to avoid races with truncate */ 3378cf17fea6SAneesh Kumar K.V static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize) 3379cf17fea6SAneesh Kumar K.V { 338090e775b7SJan Kara WARN_ON_ONCE(S_ISREG(inode->i_mode) && 33815955102cSAl Viro !inode_is_locked(inode)); 3382cf17fea6SAneesh Kumar K.V down_write(&EXT4_I(inode)->i_data_sem); 3383cf17fea6SAneesh Kumar K.V if (newsize > EXT4_I(inode)->i_disksize) 338435df4299SQian Cai WRITE_ONCE(EXT4_I(inode)->i_disksize, newsize); 3385cf17fea6SAneesh Kumar K.V up_write(&EXT4_I(inode)->i_data_sem); 338690e775b7SJan Kara } 338790e775b7SJan Kara 3388f340b3d9Shongnanli /* Update i_size, i_disksize. Requires i_rwsem to avoid races with truncate */ 33894631dbf6SDmitry Monakhov static inline int ext4_update_inode_size(struct inode *inode, loff_t newsize) 33904631dbf6SDmitry Monakhov { 33914631dbf6SDmitry Monakhov int changed = 0; 33924631dbf6SDmitry Monakhov 33934631dbf6SDmitry Monakhov if (newsize > inode->i_size) { 33944631dbf6SDmitry Monakhov i_size_write(inode, newsize); 33954631dbf6SDmitry Monakhov changed = 1; 33964631dbf6SDmitry Monakhov } 33974631dbf6SDmitry Monakhov if (newsize > EXT4_I(inode)->i_disksize) { 33984631dbf6SDmitry Monakhov ext4_update_i_disksize(inode, newsize); 33994631dbf6SDmitry Monakhov changed |= 2; 34004631dbf6SDmitry Monakhov } 34014631dbf6SDmitry Monakhov return changed; 34024631dbf6SDmitry Monakhov } 34034631dbf6SDmitry Monakhov 340401127848SJan Kara int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset, 340501127848SJan Kara loff_t len); 340601127848SJan Kara 34075d1b1b3fSAneesh Kumar K.V struct ext4_group_info { 34085d1b1b3fSAneesh Kumar K.V unsigned long bb_state; 3409addd752cSChunguang Xu #ifdef AGGRESSIVE_CHECK 3410addd752cSChunguang Xu unsigned long bb_check_counter; 3411addd752cSChunguang Xu #endif 34125d1b1b3fSAneesh Kumar K.V struct rb_root bb_free_root; 3413a36b4498SEric Sandeen ext4_grpblk_t bb_first_free; /* first free block */ 3414a36b4498SEric Sandeen ext4_grpblk_t bb_free; /* total free blocks */ 3415a36b4498SEric Sandeen ext4_grpblk_t bb_fragments; /* nr of freespace fragments */ 341683e80a6eSJan Kara int bb_avg_fragment_size_order; /* order of average 341783e80a6eSJan Kara fragment in BG */ 34188a57d9d6SCurt Wohlgemuth ext4_grpblk_t bb_largest_free_order;/* order of largest frag in BG */ 3419196e402aSHarshad Shirwadkar ext4_group_t bb_group; /* Group number */ 34205d1b1b3fSAneesh Kumar K.V struct list_head bb_prealloc_list; 34215d1b1b3fSAneesh Kumar K.V #ifdef DOUBLE_CHECK 34225d1b1b3fSAneesh Kumar K.V void *bb_bitmap; 34235d1b1b3fSAneesh Kumar K.V #endif 34245d1b1b3fSAneesh Kumar K.V struct rw_semaphore alloc_sem; 342583e80a6eSJan Kara struct list_head bb_avg_fragment_size_node; 3426196e402aSHarshad Shirwadkar struct list_head bb_largest_free_order_node; 3427a36b4498SEric Sandeen ext4_grpblk_t bb_counters[]; /* Nr of free power-of-two-block 3428a36b4498SEric Sandeen * regions, index is order. 3429a36b4498SEric Sandeen * bb_counters[3] = 5 means 3430a36b4498SEric Sandeen * 5 free 8-block regions. */ 34315d1b1b3fSAneesh Kumar K.V }; 34325d1b1b3fSAneesh Kumar K.V 34335d1b1b3fSAneesh Kumar K.V #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 34343d56b8d2STao Ma #define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1 3435163a203dSDarrick J. Wong #define EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT 2 343687a39389SDarrick J. Wong #define EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT 3 3437db79e6d1SWang Shilong #define EXT4_GROUP_INFO_BBITMAP_CORRUPT \ 3438db79e6d1SWang Shilong (1 << EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT) 3439db79e6d1SWang Shilong #define EXT4_GROUP_INFO_IBITMAP_CORRUPT \ 3440db79e6d1SWang Shilong (1 << EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT) 3441cfd73237SAlex Zhuravlev #define EXT4_GROUP_INFO_BBITMAP_READ_BIT 4 34425d1b1b3fSAneesh Kumar K.V 34435d1b1b3fSAneesh Kumar K.V #define EXT4_MB_GRP_NEED_INIT(grp) \ 34445d1b1b3fSAneesh Kumar K.V (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) 3445163a203dSDarrick J. Wong #define EXT4_MB_GRP_BBITMAP_CORRUPT(grp) \ 3446163a203dSDarrick J. Wong (test_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 344787a39389SDarrick J. Wong #define EXT4_MB_GRP_IBITMAP_CORRUPT(grp) \ 344887a39389SDarrick J. Wong (test_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 34495d1b1b3fSAneesh Kumar K.V 34503d56b8d2STao Ma #define EXT4_MB_GRP_WAS_TRIMMED(grp) \ 34513d56b8d2STao Ma (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 34523d56b8d2STao Ma #define EXT4_MB_GRP_SET_TRIMMED(grp) \ 34533d56b8d2STao Ma (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 34543d56b8d2STao Ma #define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \ 34553d56b8d2STao Ma (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 3456cfd73237SAlex Zhuravlev #define EXT4_MB_GRP_TEST_AND_SET_READ(grp) \ 3457cfd73237SAlex Zhuravlev (test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_READ_BIT, &((grp)->bb_state))) 34583d56b8d2STao Ma 345950797481STheodore Ts'o #define EXT4_MAX_CONTENTION 8 346050797481STheodore Ts'o #define EXT4_CONTENTION_THRESHOLD 2 346150797481STheodore Ts'o 3462955ce5f5SAneesh Kumar K.V static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb, 3463955ce5f5SAneesh Kumar K.V ext4_group_t group) 3464955ce5f5SAneesh Kumar K.V { 3465955ce5f5SAneesh Kumar K.V return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group); 3466955ce5f5SAneesh Kumar K.V } 3467955ce5f5SAneesh Kumar K.V 346850797481STheodore Ts'o /* 346950797481STheodore Ts'o * Returns true if the filesystem is busy enough that attempts to 347050797481STheodore Ts'o * access the block group locks has run into contention. 347150797481STheodore Ts'o */ 347250797481STheodore Ts'o static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi) 347350797481STheodore Ts'o { 347450797481STheodore Ts'o return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD); 347550797481STheodore Ts'o } 347650797481STheodore Ts'o 34775d1b1b3fSAneesh Kumar K.V static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group) 34785d1b1b3fSAneesh Kumar K.V { 347950797481STheodore Ts'o spinlock_t *lock = ext4_group_lock_ptr(sb, group); 348050797481STheodore Ts'o if (spin_trylock(lock)) 348150797481STheodore Ts'o /* 348250797481STheodore Ts'o * We're able to grab the lock right away, so drop the 348350797481STheodore Ts'o * lock contention counter. 348450797481STheodore Ts'o */ 348550797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0); 348650797481STheodore Ts'o else { 348750797481STheodore Ts'o /* 348850797481STheodore Ts'o * The lock is busy, so bump the contention counter, 348950797481STheodore Ts'o * and then wait on the spin lock. 349050797481STheodore Ts'o */ 349150797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1, 349250797481STheodore Ts'o EXT4_MAX_CONTENTION); 349350797481STheodore Ts'o spin_lock(lock); 349450797481STheodore Ts'o } 34955d1b1b3fSAneesh Kumar K.V } 34965d1b1b3fSAneesh Kumar K.V 34975d1b1b3fSAneesh Kumar K.V static inline void ext4_unlock_group(struct super_block *sb, 34985d1b1b3fSAneesh Kumar K.V ext4_group_t group) 34995d1b1b3fSAneesh Kumar K.V { 3500955ce5f5SAneesh Kumar K.V spin_unlock(ext4_group_lock_ptr(sb, group)); 35015d1b1b3fSAneesh Kumar K.V } 35025d1b1b3fSAneesh Kumar K.V 3503f177ee08SRoman Anufriev #ifdef CONFIG_QUOTA 3504f177ee08SRoman Anufriev static inline bool ext4_quota_capable(struct super_block *sb) 3505f177ee08SRoman Anufriev { 3506f177ee08SRoman Anufriev return (test_opt(sb, QUOTA) || ext4_has_feature_quota(sb)); 3507f177ee08SRoman Anufriev } 3508f177ee08SRoman Anufriev 3509f177ee08SRoman Anufriev static inline bool ext4_is_quota_journalled(struct super_block *sb) 3510f177ee08SRoman Anufriev { 3511f177ee08SRoman Anufriev struct ext4_sb_info *sbi = EXT4_SB(sb); 3512f177ee08SRoman Anufriev 3513f177ee08SRoman Anufriev return (ext4_has_feature_quota(sb) || 3514f177ee08SRoman Anufriev sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]); 3515f177ee08SRoman Anufriev } 351625c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb); 3517f177ee08SRoman Anufriev #endif 3518f177ee08SRoman Anufriev 35193dcf5451SChristoph Hellwig /* 35201f7d1e77STheodore Ts'o * Block validity checking 35211f7d1e77STheodore Ts'o */ 35221f7d1e77STheodore Ts'o #define ext4_check_indirect_blockref(inode, bh) \ 35231f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 35241f7d1e77STheodore Ts'o (__le32 *)(bh)->b_data, \ 35251f7d1e77STheodore Ts'o EXT4_ADDR_PER_BLOCK((inode)->i_sb)) 35261f7d1e77STheodore Ts'o 35271f7d1e77STheodore Ts'o #define ext4_ind_check_inode(inode) \ 35281f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 35291f7d1e77STheodore Ts'o EXT4_I(inode)->i_data, \ 35301f7d1e77STheodore Ts'o EXT4_NDIR_BLOCKS) 35311f7d1e77STheodore Ts'o 35321f7d1e77STheodore Ts'o /* 35333dcf5451SChristoph Hellwig * Inodes and files operations 35343dcf5451SChristoph Hellwig */ 35353dcf5451SChristoph Hellwig 35363dcf5451SChristoph Hellwig /* dir.c */ 35373dcf5451SChristoph Hellwig extern const struct file_operations ext4_dir_operations; 35383dcf5451SChristoph Hellwig 35393dcf5451SChristoph Hellwig /* file.c */ 35403dcf5451SChristoph Hellwig extern const struct inode_operations ext4_file_inode_operations; 35413dcf5451SChristoph Hellwig extern const struct file_operations ext4_file_operations; 3542e0d10bfaSToshiyuki Okajima extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin); 35433dcf5451SChristoph Hellwig 354495eaefbdSTheodore Ts'o /* inline.c */ 354595eaefbdSTheodore Ts'o extern int ext4_get_max_inline_size(struct inode *inode); 354695eaefbdSTheodore Ts'o extern int ext4_find_inline_data_nolock(struct inode *inode); 354795eaefbdSTheodore Ts'o extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, 354895eaefbdSTheodore Ts'o unsigned int len); 354995eaefbdSTheodore Ts'o extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); 355095eaefbdSTheodore Ts'o 355195eaefbdSTheodore Ts'o extern int ext4_readpage_inline(struct inode *inode, struct page *page); 355295eaefbdSTheodore Ts'o extern int ext4_try_to_write_inline_data(struct address_space *mapping, 355395eaefbdSTheodore Ts'o struct inode *inode, 355495eaefbdSTheodore Ts'o loff_t pos, unsigned len, 355595eaefbdSTheodore Ts'o struct page **pagep); 355695eaefbdSTheodore Ts'o extern int ext4_write_inline_data_end(struct inode *inode, 355795eaefbdSTheodore Ts'o loff_t pos, unsigned len, 355895eaefbdSTheodore Ts'o unsigned copied, 355995eaefbdSTheodore Ts'o struct page *page); 356095eaefbdSTheodore Ts'o extern struct buffer_head * 356195eaefbdSTheodore Ts'o ext4_journalled_write_inline_data(struct inode *inode, 356295eaefbdSTheodore Ts'o unsigned len, 356395eaefbdSTheodore Ts'o struct page *page); 356495eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_begin(struct address_space *mapping, 356595eaefbdSTheodore Ts'o struct inode *inode, 356695eaefbdSTheodore Ts'o loff_t pos, unsigned len, 356795eaefbdSTheodore Ts'o struct page **pagep, 356895eaefbdSTheodore Ts'o void **fsdata); 35695b643f9cSTheodore Ts'o extern int ext4_try_add_inline_entry(handle_t *handle, 35705b643f9cSTheodore Ts'o struct ext4_filename *fname, 357156a04915STheodore Ts'o struct inode *dir, struct inode *inode); 357295eaefbdSTheodore Ts'o extern int ext4_try_create_inline_dir(handle_t *handle, 357395eaefbdSTheodore Ts'o struct inode *parent, 357495eaefbdSTheodore Ts'o struct inode *inode); 357595eaefbdSTheodore Ts'o extern int ext4_read_inline_dir(struct file *filp, 3576725bebb2SAl Viro struct dir_context *ctx, 357795eaefbdSTheodore Ts'o int *has_inline_data); 35787633b08bSTheodore Ts'o extern int ext4_inlinedir_to_tree(struct file *dir_file, 35798af0f082STao Ma struct inode *dir, ext4_lblk_t block, 35808af0f082STao Ma struct dx_hash_info *hinfo, 35818af0f082STao Ma __u32 start_hash, __u32 start_minor_hash, 35828af0f082STao Ma int *has_inline_data); 358395eaefbdSTheodore Ts'o extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, 35845b643f9cSTheodore Ts'o struct ext4_filename *fname, 358595eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **res_dir, 358695eaefbdSTheodore Ts'o int *has_inline_data); 358795eaefbdSTheodore Ts'o extern int ext4_delete_inline_entry(handle_t *handle, 358895eaefbdSTheodore Ts'o struct inode *dir, 358995eaefbdSTheodore Ts'o struct ext4_dir_entry_2 *de_del, 359095eaefbdSTheodore Ts'o struct buffer_head *bh, 359195eaefbdSTheodore Ts'o int *has_inline_data); 3592a7550b30SJaegeuk Kim extern bool empty_inline_dir(struct inode *dir, int *has_inline_data); 359395eaefbdSTheodore Ts'o extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, 359495eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **parent_de, 359595eaefbdSTheodore Ts'o int *retval); 35965a57bca9SZhang Yi extern void *ext4_read_inline_link(struct inode *inode); 35977046ae35SAndreas Gruenbacher 35987046ae35SAndreas Gruenbacher struct iomap; 35997046ae35SAndreas Gruenbacher extern int ext4_inline_data_iomap(struct inode *inode, struct iomap *iomap); 36007046ae35SAndreas Gruenbacher 360101daf945STheodore Ts'o extern int ext4_inline_data_truncate(struct inode *inode, int *has_inline); 360295eaefbdSTheodore Ts'o 360395eaefbdSTheodore Ts'o extern int ext4_convert_inline_data(struct inode *inode); 360495eaefbdSTheodore Ts'o 360583447ccbSZheng Liu static inline int ext4_has_inline_data(struct inode *inode) 360683447ccbSZheng Liu { 360783447ccbSZheng Liu return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) && 360883447ccbSZheng Liu EXT4_I(inode)->i_inline_off; 360983447ccbSZheng Liu } 361083447ccbSZheng Liu 36113dcf5451SChristoph Hellwig /* namei.c */ 36123dcf5451SChristoph Hellwig extern const struct inode_operations ext4_dir_inode_operations; 36133dcf5451SChristoph Hellwig extern const struct inode_operations ext4_special_inode_operations; 3614596397b7STheodore Ts'o extern struct dentry *ext4_get_parent(struct dentry *child); 3615a774f9c2STao Ma extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode, 3616a774f9c2STao Ma struct ext4_dir_entry_2 *de, 3617a774f9c2STao Ma int blocksize, int csum_size, 3618a774f9c2STao Ma unsigned int parent_ino, int dotdot_real_len); 3619ddce3b94STheodore Ts'o extern void ext4_initialize_dirent_tail(struct buffer_head *bh, 36203c47d541STao Ma unsigned int blocksize); 3621f036adb3STheodore Ts'o extern int ext4_handle_dirty_dirblock(handle_t *handle, struct inode *inode, 36223c47d541STao Ma struct buffer_head *bh); 3623a80f7fcfSHarshad Shirwadkar extern int __ext4_unlink(handle_t *handle, struct inode *dir, const struct qstr *d_name, 36248016e29fSHarshad Shirwadkar struct inode *inode); 36258016e29fSHarshad Shirwadkar extern int __ext4_link(struct inode *dir, struct inode *inode, 36268016e29fSHarshad Shirwadkar struct dentry *dentry); 3627b886ee3eSGabriel Krisman Bertazi 36288af0f082STao Ma #define S_SHIFT 12 3629381cebfeSDan Carpenter static const unsigned char ext4_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = { 36308af0f082STao Ma [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE, 36318af0f082STao Ma [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR, 36328af0f082STao Ma [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV, 36338af0f082STao Ma [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV, 36348af0f082STao Ma [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO, 36358af0f082STao Ma [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK, 36368af0f082STao Ma [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK, 36378af0f082STao Ma }; 36388af0f082STao Ma 36398af0f082STao Ma static inline void ext4_set_de_type(struct super_block *sb, 36408af0f082STao Ma struct ext4_dir_entry_2 *de, 36418af0f082STao Ma umode_t mode) { 3642e2b911c5SDarrick J. Wong if (ext4_has_feature_filetype(sb)) 36438af0f082STao Ma de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; 36448af0f082STao Ma } 36458af0f082STao Ma 3646f64e02feSTheodore Ts'o /* readpages.c */ 3647a07f624bSMatthew Wilcox (Oracle) extern int ext4_mpage_readpages(struct inode *inode, 36486311f91fSMatthew Wilcox (Oracle) struct readahead_control *rac, struct page *page); 364922cfe4b4SEric Biggers extern int __init ext4_init_post_read_processing(void); 365022cfe4b4SEric Biggers extern void ext4_exit_post_read_processing(void); 36513dcf5451SChristoph Hellwig 36523dcf5451SChristoph Hellwig /* symlink.c */ 3653a7a67e8aSAl Viro extern const struct inode_operations ext4_encrypted_symlink_inode_operations; 36543dcf5451SChristoph Hellwig extern const struct inode_operations ext4_symlink_inode_operations; 36553dcf5451SChristoph Hellwig extern const struct inode_operations ext4_fast_symlink_inode_operations; 36563dcf5451SChristoph Hellwig 3657b5799018STheodore Ts'o /* sysfs.c */ 3658d578b994SJonathan Davies extern void ext4_notify_error_sysfs(struct ext4_sb_info *sbi); 3659b5799018STheodore Ts'o extern int ext4_register_sysfs(struct super_block *sb); 3660ebd173beSTheodore Ts'o extern void ext4_unregister_sysfs(struct super_block *sb); 3661b5799018STheodore Ts'o extern int __init ext4_init_sysfs(void); 3662b5799018STheodore Ts'o extern void ext4_exit_sysfs(void); 3663b5799018STheodore Ts'o 36646fd058f7STheodore Ts'o /* block_validity */ 36656fd058f7STheodore Ts'o extern void ext4_release_system_zone(struct super_block *sb); 36666fd058f7STheodore Ts'o extern int ext4_setup_system_zone(struct super_block *sb); 36675dabfc78STheodore Ts'o extern int __init ext4_init_system_zone(void); 36685dabfc78STheodore Ts'o extern void ext4_exit_system_zone(void); 3669ce9f24ccSJan Kara extern int ext4_inode_block_valid(struct inode *inode, 36706fd058f7STheodore Ts'o ext4_fsblk_t start_blk, 36716fd058f7STheodore Ts'o unsigned int count); 36721f7d1e77STheodore Ts'o extern int ext4_check_blockref(const char *, unsigned int, 36731f7d1e77STheodore Ts'o struct inode *, __le32 *, unsigned int); 36746bc6c2bdSRitesh Harjani extern int ext4_sb_block_valid(struct super_block *sb, struct inode *inode, 36756bc6c2bdSRitesh Harjani ext4_fsblk_t start_blk, unsigned int count); 36766bc6c2bdSRitesh Harjani 36776fd058f7STheodore Ts'o 36783dcf5451SChristoph Hellwig /* extents.c */ 36794a092d73STheodore Ts'o struct ext4_ext_path; 36804a092d73STheodore Ts'o struct ext4_extent; 36814a092d73STheodore Ts'o 3682d7b2a00cSZheng Liu /* 3683d7b2a00cSZheng Liu * Maximum number of logical blocks in a file; ext4_extent's ee_block is 3684d7b2a00cSZheng Liu * __le32. 3685d7b2a00cSZheng Liu */ 3686d7b2a00cSZheng Liu #define EXT_MAX_BLOCKS 0xffffffff 3687d7b2a00cSZheng Liu 36884209ae12SHarshad Shirwadkar extern void ext4_ext_tree_init(handle_t *handle, struct inode *inode); 3689fffb2739SJan Kara extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents); 3690e35fd660STheodore Ts'o extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, 3691e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 3692d0abb36dSTheodore Ts'o extern int ext4_ext_truncate(handle_t *, struct inode *); 369326a4c0c6STheodore Ts'o extern int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start, 369426a4c0c6STheodore Ts'o ext4_lblk_t end); 36953dcf5451SChristoph Hellwig extern void ext4_ext_init(struct super_block *); 36963dcf5451SChristoph Hellwig extern void ext4_ext_release(struct super_block *); 36972fe17c10SChristoph Hellwig extern long ext4_fallocate(struct file *file, int mode, loff_t offset, 36983dcf5451SChristoph Hellwig loff_t len); 36996b523df4SJan Kara extern int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode, 37006b523df4SJan Kara loff_t offset, ssize_t len); 3701a00713eaSRitesh Harjani extern int ext4_convert_unwritten_io_end_vec(handle_t *handle, 3702a00713eaSRitesh Harjani ext4_io_end_t *io_end); 3703e35fd660STheodore Ts'o extern int ext4_map_blocks(handle_t *handle, struct inode *inode, 3704e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 37054a092d73STheodore Ts'o extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode, 37064a092d73STheodore Ts'o int num, 37074a092d73STheodore Ts'o struct ext4_ext_path *path); 37084a092d73STheodore Ts'o extern int ext4_ext_insert_extent(handle_t *, struct inode *, 3709dfe50809STheodore Ts'o struct ext4_ext_path **, 37104a092d73STheodore Ts'o struct ext4_extent *, int); 3711ed8a1a76STheodore Ts'o extern struct ext4_ext_path *ext4_find_extent(struct inode *, ext4_lblk_t, 3712705912caSTheodore Ts'o struct ext4_ext_path **, 3713107a7bd3STheodore Ts'o int flags); 37147ff5fddaSYe Bin extern void ext4_free_ext_path(struct ext4_ext_path *); 37154a092d73STheodore Ts'o extern int ext4_ext_check_inode(struct inode *inode); 3716fcf6b1b7SDmitry Monakhov extern ext4_lblk_t ext4_ext_next_allocated_block(struct ext4_ext_path *path); 37173a06d778SAneesh Kumar K.V extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 37183a06d778SAneesh Kumar K.V __u64 start, __u64 len); 3719bb5835edSTheodore Ts'o extern int ext4_get_es_cache(struct inode *inode, 3720bb5835edSTheodore Ts'o struct fiemap_extent_info *fieinfo, 3721bb5835edSTheodore Ts'o __u64 start, __u64 len); 37227869a4a6STheodore Ts'o extern int ext4_ext_precache(struct inode *inode); 3723fcf6b1b7SDmitry Monakhov extern int ext4_swap_extents(handle_t *handle, struct inode *inode1, 3724fcf6b1b7SDmitry Monakhov struct inode *inode2, ext4_lblk_t lblk1, 3725fcf6b1b7SDmitry Monakhov ext4_lblk_t lblk2, ext4_lblk_t count, 3726fcf6b1b7SDmitry Monakhov int mark_unwritten,int *err); 37270b02f4c0SEric Whitney extern int ext4_clu_mapped(struct inode *inode, ext4_lblk_t lclu); 3728a4130367SJan Kara extern int ext4_datasem_ensure_credits(handle_t *handle, struct inode *inode, 372983448bdfSJan Kara int check_cred, int restart_cred, 373083448bdfSJan Kara int revoke_cred); 37318016e29fSHarshad Shirwadkar extern void ext4_ext_replay_shrink_inode(struct inode *inode, ext4_lblk_t end); 37328016e29fSHarshad Shirwadkar extern int ext4_ext_replay_set_iblocks(struct inode *inode); 37338016e29fSHarshad Shirwadkar extern int ext4_ext_replay_update_ex(struct inode *inode, ext4_lblk_t start, 37348016e29fSHarshad Shirwadkar int len, int unwritten, ext4_fsblk_t pblk); 37358016e29fSHarshad Shirwadkar extern int ext4_ext_clear_bb(struct inode *inode); 3736a4130367SJan Kara 37374a092d73STheodore Ts'o 3738748de673SAkira Fujita /* move_extent.c */ 3739393d1d1dSDr. Tilmann Bubeck extern void ext4_double_down_write_data_sem(struct inode *first, 3740393d1d1dSDr. Tilmann Bubeck struct inode *second); 3741393d1d1dSDr. Tilmann Bubeck extern void ext4_double_up_write_data_sem(struct inode *orig_inode, 3742393d1d1dSDr. Tilmann Bubeck struct inode *donor_inode); 3743748de673SAkira Fujita extern int ext4_move_extents(struct file *o_filp, struct file *d_filp, 3744748de673SAkira Fujita __u64 start_orig, __u64 start_donor, 3745748de673SAkira Fujita __u64 len, __u64 *moved_len); 3746748de673SAkira Fujita 3747bd2d0210STheodore Ts'o /* page-io.c */ 37485dabfc78STheodore Ts'o extern int __init ext4_init_pageio(void); 37495dabfc78STheodore Ts'o extern void ext4_exit_pageio(void); 3750bd2d0210STheodore Ts'o extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags); 375197a851edSJan Kara extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end); 375297a851edSJan Kara extern int ext4_put_io_end(ext4_io_end_t *io_end); 375397a851edSJan Kara extern void ext4_put_io_end_defer(ext4_io_end_t *io_end); 375497a851edSJan Kara extern void ext4_io_submit_init(struct ext4_io_submit *io, 375597a851edSJan Kara struct writeback_control *wbc); 37562e8fa54eSJan Kara extern void ext4_end_io_rsv_work(struct work_struct *work); 3757bd2d0210STheodore Ts'o extern void ext4_io_submit(struct ext4_io_submit *io); 3758bd2d0210STheodore Ts'o extern int ext4_bio_write_page(struct ext4_io_submit *io, 3759bd2d0210STheodore Ts'o struct page *page, 3760bd2d0210STheodore Ts'o int len, 37611c8349a1SNamjae Jeon bool keep_towrite); 3762c8cc8816SRitesh Harjani extern struct ext4_io_end_vec *ext4_alloc_io_end_vec(ext4_io_end_t *io_end); 3763c8cc8816SRitesh Harjani extern struct ext4_io_end_vec *ext4_last_io_end_vec(ext4_io_end_t *io_end); 37643a06d778SAneesh Kumar K.V 3765c5e06d10SJohann Lombardi /* mmp.c */ 3766c5e06d10SJohann Lombardi extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t); 3767c5e06d10SJohann Lombardi 3768618f0031SPavel Skripkin /* mmp.c */ 3769618f0031SPavel Skripkin extern void ext4_stop_mmpd(struct ext4_sb_info *sbi); 3770618f0031SPavel Skripkin 3771c93d8f88SEric Biggers /* verity.c */ 3772c93d8f88SEric Biggers extern const struct fsverity_operations ext4_verityops; 3773c93d8f88SEric Biggers 377425c6d98fSJan Kara /* orphan.c */ 377525c6d98fSJan Kara extern int ext4_orphan_add(handle_t *, struct inode *); 377625c6d98fSJan Kara extern int ext4_orphan_del(handle_t *, struct inode *); 377725c6d98fSJan Kara extern void ext4_orphan_cleanup(struct super_block *sb, 377825c6d98fSJan Kara struct ext4_super_block *es); 377902f310fcSJan Kara extern void ext4_release_orphan_info(struct super_block *sb); 378002f310fcSJan Kara extern int ext4_init_orphan_info(struct super_block *sb); 378102f310fcSJan Kara extern int ext4_orphan_file_empty(struct super_block *sb); 378202f310fcSJan Kara extern void ext4_orphan_file_block_trigger( 378302f310fcSJan Kara struct jbd2_buffer_trigger_type *triggers, 378402f310fcSJan Kara struct buffer_head *bh, 378502f310fcSJan Kara void *data, size_t size); 378625c6d98fSJan Kara 37873613d228SJan Kara /* 378848fc7f7eSAdam Buchbinder * Add new method to test whether block and inode bitmaps are properly 37892ccb5fb9SAneesh Kumar K.V * initialized. With uninit_bg reading the block from disk is not enough 37902ccb5fb9SAneesh Kumar K.V * to mark the bitmap uptodate. We need to also zero-out the bitmap 37912ccb5fb9SAneesh Kumar K.V */ 37922ccb5fb9SAneesh Kumar K.V #define BH_BITMAP_UPTODATE BH_JBDPrivateStart 37932ccb5fb9SAneesh Kumar K.V 37942ccb5fb9SAneesh Kumar K.V static inline int bitmap_uptodate(struct buffer_head *bh) 37952ccb5fb9SAneesh Kumar K.V { 37962ccb5fb9SAneesh Kumar K.V return (buffer_uptodate(bh) && 37972ccb5fb9SAneesh Kumar K.V test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state)); 37982ccb5fb9SAneesh Kumar K.V } 37992ccb5fb9SAneesh Kumar K.V static inline void set_bitmap_uptodate(struct buffer_head *bh) 38002ccb5fb9SAneesh Kumar K.V { 38012ccb5fb9SAneesh Kumar K.V set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state); 38022ccb5fb9SAneesh Kumar K.V } 38032ccb5fb9SAneesh Kumar K.V 3804731eb1a0SAkinobu Mita #define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1) 3805731eb1a0SAkinobu Mita 3806e9e3bcecSEric Sandeen /* For ioend & aio unwritten conversion wait queues */ 3807e9e3bcecSEric Sandeen #define EXT4_WQ_HASH_SZ 37 3808e9e3bcecSEric Sandeen #define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\ 3809e9e3bcecSEric Sandeen EXT4_WQ_HASH_SZ]) 3810e9e3bcecSEric Sandeen extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 3811e9e3bcecSEric Sandeen 38128f82f840SYongqiang Yang extern int ext4_resize_begin(struct super_block *sb); 3813827891a3STheodore Ts'o extern int ext4_resize_end(struct super_block *sb, bool update_backups); 38148f82f840SYongqiang Yang 381574c66bcbSJan Kara static inline void ext4_set_io_unwritten_flag(struct inode *inode, 381674c66bcbSJan Kara struct ext4_io_end *io_end) 381774c66bcbSJan Kara { 381874c66bcbSJan Kara if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) { 381974c66bcbSJan Kara io_end->flag |= EXT4_IO_END_UNWRITTEN; 382074c66bcbSJan Kara atomic_inc(&EXT4_I(inode)->i_unwritten); 382174c66bcbSJan Kara } 382274c66bcbSJan Kara } 382374c66bcbSJan Kara 382474c66bcbSJan Kara static inline void ext4_clear_io_unwritten_flag(ext4_io_end_t *io_end) 382574c66bcbSJan Kara { 382674c66bcbSJan Kara struct inode *inode = io_end->inode; 382774c66bcbSJan Kara 382874c66bcbSJan Kara if (io_end->flag & EXT4_IO_END_UNWRITTEN) { 382974c66bcbSJan Kara io_end->flag &= ~EXT4_IO_END_UNWRITTEN; 383074c66bcbSJan Kara /* Wake up anyone waiting on unwritten extent conversion */ 383174c66bcbSJan Kara if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten)) 383274c66bcbSJan Kara wake_up_all(ext4_ioend_wq(inode)); 383374c66bcbSJan Kara } 383474c66bcbSJan Kara } 383574c66bcbSJan Kara 38368ff6daa1SChristoph Hellwig extern const struct iomap_ops ext4_iomap_ops; 38378cd115bdSJan Kara extern const struct iomap_ops ext4_iomap_overwrite_ops; 383809edf4d3SMatthew Bobrowski extern const struct iomap_ops ext4_iomap_report_ops; 3839364443cbSJan Kara 38407963e5acSZhangXiaoxu static inline int ext4_buffer_uptodate(struct buffer_head *bh) 38417963e5acSZhangXiaoxu { 38427963e5acSZhangXiaoxu /* 38437963e5acSZhangXiaoxu * If the buffer has the write error flag, we have failed 38447963e5acSZhangXiaoxu * to write out data in the block. In this case, we don't 38457963e5acSZhangXiaoxu * have to read the block because we may read the old data 38467963e5acSZhangXiaoxu * successfully. 38477963e5acSZhangXiaoxu */ 38485c680150SJoseph Qi if (buffer_write_io_error(bh)) 38497963e5acSZhangXiaoxu set_buffer_uptodate(bh); 38507963e5acSZhangXiaoxu return buffer_uptodate(bh); 38517963e5acSZhangXiaoxu } 38527963e5acSZhangXiaoxu 38533dcf5451SChristoph Hellwig #endif /* __KERNEL__ */ 38543dcf5451SChristoph Hellwig 38556a797d27SDarrick J. Wong #define EFSBADCRC EBADMSG /* Bad CRC detected */ 38566a797d27SDarrick J. Wong #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 38576a797d27SDarrick J. Wong 38583dcf5451SChristoph Hellwig #endif /* _EXT4_H */ 3859