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 203dcf5451SChristoph Hellwig #include <linux/types.h> 213dcf5451SChristoph Hellwig #include <linux/blkdev.h> 223dcf5451SChristoph Hellwig #include <linux/magic.h> 232ccb5fb9SAneesh Kumar K.V #include <linux/jbd2.h> 2460e58e0fSMingming Cao #include <linux/quota.h> 25d444c3c3STheodore Ts'o #include <linux/rwsem.h> 26d444c3c3STheodore Ts'o #include <linux/rbtree.h> 27d444c3c3STheodore Ts'o #include <linux/seqlock.h> 28d444c3c3STheodore Ts'o #include <linux/mutex.h> 29ca0faba0STheodore Ts'o #include <linux/timer.h> 30ca0faba0STheodore Ts'o #include <linux/wait.h> 31174cd4b1SIngo Molnar #include <linux/sched/signal.h> 32ca0faba0STheodore Ts'o #include <linux/blockgroup_lock.h> 33ca0faba0STheodore Ts'o #include <linux/percpu_counter.h> 34efbed4dcSTheodore Ts'o #include <linux/ratelimit.h> 350441984aSDarrick J. Wong #include <crypto/hash.h> 36a633f5a3SLukas Czerner #include <linux/falloc.h> 37c8585c6fSDaeho Jeong #include <linux/percpu-rwsem.h> 3810c5db28SChristoph Hellwig #include <linux/fiemap.h> 394d92dc0fSBen Hutchings #ifdef __KERNEL__ 404d92dc0fSBen Hutchings #include <linux/compat.h> 414d92dc0fSBen Hutchings #endif 423dcf5451SChristoph Hellwig 43734f0d24SDave Chinner #include <linux/fscrypt.h> 44c93d8f88SEric Biggers #include <linux/fsverity.h> 45734f0d24SDave Chinner 46072ebb3bSTheodore Ts'o #include <linux/compiler.h> 47072ebb3bSTheodore Ts'o 483dcf5451SChristoph Hellwig /* 498a35694eSShen Feng * The fourth extended filesystem constants/structures 503dcf5451SChristoph Hellwig */ 513dcf5451SChristoph Hellwig 523dcf5451SChristoph Hellwig /* 53a2821e34SAihua Zhang * with AGGRESSIVE_CHECK allocator runs consistency checks over 54a2821e34SAihua Zhang * structures. these checks slow things down a lot 55a2821e34SAihua Zhang */ 56a2821e34SAihua Zhang #define AGGRESSIVE_CHECK__ 57a2821e34SAihua Zhang 58a2821e34SAihua Zhang /* 59a2821e34SAihua Zhang * with DOUBLE_CHECK defined mballoc creates persistent in-core 60a2821e34SAihua Zhang * bitmaps, maintains and uses them to check for double allocations 61a2821e34SAihua Zhang */ 62a2821e34SAihua Zhang #define DOUBLE_CHECK__ 63a2821e34SAihua Zhang 64a2821e34SAihua Zhang /* 653dcf5451SChristoph Hellwig * Define EXT4FS_DEBUG to produce debug messages 663dcf5451SChristoph Hellwig */ 673dcf5451SChristoph Hellwig #undef EXT4FS_DEBUG 683dcf5451SChristoph Hellwig 693dcf5451SChristoph Hellwig /* 703dcf5451SChristoph Hellwig * Debug code 713dcf5451SChristoph Hellwig */ 723dcf5451SChristoph Hellwig #ifdef EXT4FS_DEBUG 733dcf5451SChristoph Hellwig #define ext4_debug(f, a...) \ 743dcf5451SChristoph Hellwig do { \ 753dcf5451SChristoph Hellwig printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ 764db9c54aSStoyan Gaydarov __FILE__, __LINE__, __func__); \ 773dcf5451SChristoph Hellwig printk(KERN_DEBUG f, ## a); \ 783dcf5451SChristoph Hellwig } while (0) 793dcf5451SChristoph Hellwig #else 80ace36ad4SJoe Perches #define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) 813dcf5451SChristoph Hellwig #endif 823dcf5451SChristoph Hellwig 834a092d73STheodore Ts'o /* 8470aa1554SRitesh Harjani * Turn on EXT_DEBUG to enable ext4_ext_show_path/leaf/move in extents.c 854a092d73STheodore Ts'o */ 864a092d73STheodore Ts'o #define EXT_DEBUG__ 8770aa1554SRitesh Harjani 8870aa1554SRitesh Harjani /* 8970aa1554SRitesh Harjani * Dynamic printk for controlled extents debugging. 9070aa1554SRitesh Harjani */ 9170aa1554SRitesh Harjani #ifdef CONFIG_EXT4_DEBUG 9270aa1554SRitesh Harjani #define ext_debug(ino, fmt, ...) \ 9370aa1554SRitesh Harjani pr_debug("[%s/%d] EXT4-fs (%s): ino %lu: (%s, %d): %s:" fmt, \ 9470aa1554SRitesh Harjani current->comm, task_pid_nr(current), \ 9570aa1554SRitesh Harjani ino->i_sb->s_id, ino->i_ino, __FILE__, __LINE__, \ 9670aa1554SRitesh Harjani __func__, ##__VA_ARGS__) 974a092d73STheodore Ts'o #else 9870aa1554SRitesh Harjani #define ext_debug(ino, fmt, ...) no_printk(fmt, ##__VA_ARGS__) 994a092d73STheodore Ts'o #endif 1004a092d73STheodore Ts'o 101837c23fbSChunguang Xu #define ASSERT(assert) \ 102837c23fbSChunguang Xu do { \ 103837c23fbSChunguang Xu if (unlikely(!(assert))) { \ 104837c23fbSChunguang Xu printk(KERN_EMERG \ 105837c23fbSChunguang Xu "Assertion failure in %s() at %s:%d: '%s'\n", \ 106837c23fbSChunguang Xu __func__, __FILE__, __LINE__, #assert); \ 107837c23fbSChunguang Xu BUG(); \ 108837c23fbSChunguang Xu } \ 109837c23fbSChunguang Xu } while (0) 110837c23fbSChunguang Xu 111d444c3c3STheodore Ts'o /* data type for block offset of block group */ 112d444c3c3STheodore Ts'o typedef int ext4_grpblk_t; 113d444c3c3STheodore Ts'o 114d444c3c3STheodore Ts'o /* data type for filesystem-wide blocks number */ 115d444c3c3STheodore Ts'o typedef unsigned long long ext4_fsblk_t; 116d444c3c3STheodore Ts'o 117d444c3c3STheodore Ts'o /* data type for file logical block number */ 118d444c3c3STheodore Ts'o typedef __u32 ext4_lblk_t; 119d444c3c3STheodore Ts'o 120d444c3c3STheodore Ts'o /* data type for block group number */ 121d444c3c3STheodore Ts'o typedef unsigned int ext4_group_t; 122d444c3c3STheodore Ts'o 123331573feSNamjae Jeon enum SHIFT_DIRECTION { 124331573feSNamjae Jeon SHIFT_LEFT = 0, 125331573feSNamjae Jeon SHIFT_RIGHT, 126331573feSNamjae Jeon }; 127331573feSNamjae Jeon 128296c355cSTheodore Ts'o /* 129296c355cSTheodore Ts'o * Flags used in mballoc's allocation_context flags field. 130296c355cSTheodore Ts'o * 131296c355cSTheodore Ts'o * Also used to show what's going on for debugging purposes when the 132296c355cSTheodore Ts'o * flag field is exported via the traceport interface 133296c355cSTheodore Ts'o */ 134d444c3c3STheodore Ts'o 1353dcf5451SChristoph Hellwig /* prefer goal again. length */ 1360ef90db9STheodore Ts'o #define EXT4_MB_HINT_MERGE 0x0001 1373dcf5451SChristoph Hellwig /* blocks already reserved */ 1380ef90db9STheodore Ts'o #define EXT4_MB_HINT_RESERVED 0x0002 1393dcf5451SChristoph Hellwig /* metadata is being allocated */ 1400ef90db9STheodore Ts'o #define EXT4_MB_HINT_METADATA 0x0004 1413dcf5451SChristoph Hellwig /* first blocks in the file */ 1420ef90db9STheodore Ts'o #define EXT4_MB_HINT_FIRST 0x0008 1433dcf5451SChristoph Hellwig /* search for the best chunk */ 1440ef90db9STheodore Ts'o #define EXT4_MB_HINT_BEST 0x0010 1453dcf5451SChristoph Hellwig /* data is being allocated */ 1460ef90db9STheodore Ts'o #define EXT4_MB_HINT_DATA 0x0020 1473dcf5451SChristoph Hellwig /* don't preallocate (for tails) */ 1480ef90db9STheodore Ts'o #define EXT4_MB_HINT_NOPREALLOC 0x0040 1493dcf5451SChristoph Hellwig /* allocate for locality group */ 1500ef90db9STheodore Ts'o #define EXT4_MB_HINT_GROUP_ALLOC 0x0080 1513dcf5451SChristoph Hellwig /* allocate goal blocks or none */ 1520ef90db9STheodore Ts'o #define EXT4_MB_HINT_GOAL_ONLY 0x0100 1533dcf5451SChristoph Hellwig /* goal is meaningful */ 1540ef90db9STheodore Ts'o #define EXT4_MB_HINT_TRY_GOAL 0x0200 155d2a17637SMingming Cao /* blocks already pre-reserved by delayed allocation */ 1560ef90db9STheodore Ts'o #define EXT4_MB_DELALLOC_RESERVED 0x0400 1574ba74d00STheodore Ts'o /* We are doing stream allocation */ 1584ba74d00STheodore Ts'o #define EXT4_MB_STREAM_ALLOC 0x0800 15955f020dbSAllison Henderson /* Use reserved root blocks if needed */ 16055f020dbSAllison Henderson #define EXT4_MB_USE_ROOT_BLOCKS 0x1000 16127dd4385SLukas Czerner /* Use blocks from reserved pool */ 16227dd4385SLukas Czerner #define EXT4_MB_USE_RESERVED 0x2000 16399377830SRitesh Harjani /* Do strict check for free blocks while retrying block allocation */ 16499377830SRitesh Harjani #define EXT4_MB_STRICT_CHECK 0x4000 165196e402aSHarshad Shirwadkar /* Large fragment size list lookup succeeded at least once for cr = 0 */ 166196e402aSHarshad Shirwadkar #define EXT4_MB_CR0_OPTIMIZED 0x8000 167196e402aSHarshad Shirwadkar /* Avg fragment size rb tree lookup succeeded at least once for cr = 1 */ 168196e402aSHarshad Shirwadkar #define EXT4_MB_CR1_OPTIMIZED 0x00010000 169196e402aSHarshad Shirwadkar /* Perform linear traversal for one group */ 170196e402aSHarshad Shirwadkar #define EXT4_MB_SEARCH_NEXT_LINEAR 0x00020000 1713dcf5451SChristoph Hellwig struct ext4_allocation_request { 1723dcf5451SChristoph Hellwig /* target inode for block we're allocating */ 1733dcf5451SChristoph Hellwig struct inode *inode; 1743dcf5451SChristoph Hellwig /* how many blocks we want to allocate */ 175498e5f24STheodore Ts'o unsigned int len; 176726447d8SEric Sandeen /* logical block in target inode */ 177726447d8SEric Sandeen ext4_lblk_t logical; 178726447d8SEric Sandeen /* the closest logical allocated block to the left */ 179726447d8SEric Sandeen ext4_lblk_t lleft; 180726447d8SEric Sandeen /* the closest logical allocated block to the right */ 181726447d8SEric Sandeen ext4_lblk_t lright; 182726447d8SEric Sandeen /* phys. target (a hint) */ 183726447d8SEric Sandeen ext4_fsblk_t goal; 184726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the left */ 185726447d8SEric Sandeen ext4_fsblk_t pleft; 186726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the right */ 187726447d8SEric Sandeen ext4_fsblk_t pright; 1883dcf5451SChristoph Hellwig /* flags. see above EXT4_MB_HINT_* */ 189498e5f24STheodore Ts'o unsigned int flags; 1903dcf5451SChristoph Hellwig }; 1913dcf5451SChristoph Hellwig 1923dcf5451SChristoph Hellwig /* 193e35fd660STheodore Ts'o * Logical to physical block mapping, used by ext4_map_blocks() 194e35fd660STheodore Ts'o * 195e35fd660STheodore Ts'o * This structure is used to pass requests into ext4_map_blocks() as 196e35fd660STheodore Ts'o * well as to store the information returned by ext4_map_blocks(). It 197e35fd660STheodore Ts'o * takes less room on the stack than a struct buffer_head. 198e35fd660STheodore Ts'o */ 1996db07461SRitesh Harjani #define EXT4_MAP_NEW BIT(BH_New) 2006db07461SRitesh Harjani #define EXT4_MAP_MAPPED BIT(BH_Mapped) 2016db07461SRitesh Harjani #define EXT4_MAP_UNWRITTEN BIT(BH_Unwritten) 2026db07461SRitesh Harjani #define EXT4_MAP_BOUNDARY BIT(BH_Boundary) 203e35fd660STheodore Ts'o #define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\ 204cbd7584eSJan Kara EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY) 205e35fd660STheodore Ts'o 206e35fd660STheodore Ts'o struct ext4_map_blocks { 207e35fd660STheodore Ts'o ext4_fsblk_t m_pblk; 208e35fd660STheodore Ts'o ext4_lblk_t m_lblk; 209e35fd660STheodore Ts'o unsigned int m_len; 210e35fd660STheodore Ts'o unsigned int m_flags; 211e35fd660STheodore Ts'o }; 212e35fd660STheodore Ts'o 213e35fd660STheodore Ts'o /* 2147727ae52Szhangyi (F) * Block validity checking, system zone rbtree. 2157727ae52Szhangyi (F) */ 2167727ae52Szhangyi (F) struct ext4_system_blocks { 2177727ae52Szhangyi (F) struct rb_root root; 2187727ae52Szhangyi (F) struct rcu_head rcu; 2197727ae52Szhangyi (F) }; 2207727ae52Szhangyi (F) 2217727ae52Szhangyi (F) /* 222bd2d0210STheodore Ts'o * Flags for ext4_io_end->flags 223bd2d0210STheodore Ts'o */ 224bd2d0210STheodore Ts'o #define EXT4_IO_END_UNWRITTEN 0x0001 225bd2d0210STheodore Ts'o 226c8cc8816SRitesh Harjani struct ext4_io_end_vec { 227c8cc8816SRitesh Harjani struct list_head list; /* list of io_end_vec */ 228c8cc8816SRitesh Harjani loff_t offset; /* offset in the file */ 229c8cc8816SRitesh Harjani ssize_t size; /* size of the extent */ 230c8cc8816SRitesh Harjani }; 231c8cc8816SRitesh Harjani 2324188188bSCurt Wohlgemuth /* 233556615dcSLukas Czerner * For converting unwritten extents on a work queue. 'handle' is used for 2346b523df4SJan Kara * buffered writeback. 2354188188bSCurt Wohlgemuth */ 2360031462bSMingming Cao typedef struct ext4_io_end { 2375b3ff237Sjiayingz@google.com (Jiaying Zhang) struct list_head list; /* per-file finished IO list */ 2386b523df4SJan Kara handle_t *handle; /* handle reserved for extent 2396b523df4SJan Kara * conversion */ 2400031462bSMingming Cao struct inode *inode; /* file being written to */ 241b0857d30SJan Kara struct bio *bio; /* Linked list of completed 242b0857d30SJan Kara * bios covering the extent */ 2438d5d02e6SMingming Cao unsigned int flag; /* unwritten or not */ 2443bd6ad7bSJan Kara atomic_t count; /* reference counter */ 245c8cc8816SRitesh Harjani struct list_head list_vec; /* list of ext4_io_end_vec */ 2460031462bSMingming Cao } ext4_io_end_t; 2470031462bSMingming Cao 248bd2d0210STheodore Ts'o struct ext4_io_submit { 2495a33911fSTejun Heo struct writeback_control *io_wbc; 250bd2d0210STheodore Ts'o struct bio *io_bio; 251bd2d0210STheodore Ts'o ext4_io_end_t *io_end; 252bd2d0210STheodore Ts'o sector_t io_next_block; 253bd2d0210STheodore Ts'o }; 254bd2d0210STheodore Ts'o 255b3a3ca8cSTheodore Ts'o /* 2563dcf5451SChristoph Hellwig * Special inodes numbers 2573dcf5451SChristoph Hellwig */ 2583dcf5451SChristoph Hellwig #define EXT4_BAD_INO 1 /* Bad blocks inode */ 2593dcf5451SChristoph Hellwig #define EXT4_ROOT_INO 2 /* Root inode */ 260ae812306SAditya Kali #define EXT4_USR_QUOTA_INO 3 /* User quota inode */ 261ae812306SAditya Kali #define EXT4_GRP_QUOTA_INO 4 /* Group quota inode */ 2623dcf5451SChristoph Hellwig #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ 2633dcf5451SChristoph Hellwig #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ 2643dcf5451SChristoph Hellwig #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ 2653dcf5451SChristoph Hellwig #define EXT4_JOURNAL_INO 8 /* Journal inode */ 2663dcf5451SChristoph Hellwig 2673dcf5451SChristoph Hellwig /* First non-reserved inode for old ext4 filesystems */ 2683dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_FIRST_INO 11 2693dcf5451SChristoph Hellwig 2703dcf5451SChristoph Hellwig /* 2713dcf5451SChristoph Hellwig * Maximal count of links to a file 2723dcf5451SChristoph Hellwig */ 2733dcf5451SChristoph Hellwig #define EXT4_LINK_MAX 65000 2743dcf5451SChristoph Hellwig 2753dcf5451SChristoph Hellwig /* 2763dcf5451SChristoph Hellwig * Macro-instructions used to manage several block sizes 2773dcf5451SChristoph Hellwig */ 2783dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_SIZE 1024 2793dcf5451SChristoph Hellwig #define EXT4_MAX_BLOCK_SIZE 65536 2803dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_LOG_SIZE 10 281fb1813f4SCurt Wohlgemuth #define EXT4_MAX_BLOCK_LOG_SIZE 16 2829e47a4c9STheodore Ts'o #define EXT4_MAX_CLUSTER_LOG_SIZE 30 2833dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2843dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) 2853dcf5451SChristoph Hellwig #else 2863dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) 2873dcf5451SChristoph Hellwig #endif 2883dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32)) 289281b5995STheodore Ts'o #define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \ 290281b5995STheodore Ts'o EXT4_SB(s)->s_cluster_bits) 2913dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2923dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) 293281b5995STheodore Ts'o # define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits) 2943dcf5451SChristoph Hellwig #else 2953dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) 2963dcf5451SChristoph Hellwig #endif 2973dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2983dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) 2993dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) 3003dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) 3013dcf5451SChristoph Hellwig #else 3023dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 3033dcf5451SChristoph Hellwig EXT4_GOOD_OLD_INODE_SIZE : \ 3043dcf5451SChristoph Hellwig (s)->s_inode_size) 3053dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 3063dcf5451SChristoph Hellwig EXT4_GOOD_OLD_FIRST_INO : \ 3073dcf5451SChristoph Hellwig (s)->s_first_ino) 3083dcf5451SChristoph Hellwig #endif 3093dcf5451SChristoph Hellwig #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) 310518eaa63SFabian Frederick #define EXT4_MAX_BLOCKS(size, offset, blkbits) \ 311518eaa63SFabian Frederick ((EXT4_BLOCK_ALIGN(size + offset, blkbits) >> blkbits) - (offset >> \ 312518eaa63SFabian Frederick blkbits)) 3133dcf5451SChristoph Hellwig 314d5b8f310STheodore Ts'o /* Translate a block number to a cluster number */ 315d5b8f310STheodore Ts'o #define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits) 316d5b8f310STheodore Ts'o /* Translate a cluster number to a block number */ 317d5b8f310STheodore Ts'o #define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits) 318d5b8f310STheodore Ts'o /* Translate # of blks to # of clusters */ 319d5b8f310STheodore Ts'o #define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \ 320d5b8f310STheodore Ts'o (sbi)->s_cluster_bits) 321f5a44db5STheodore Ts'o /* Mask out the low bits to get the starting block of the cluster */ 322f5a44db5STheodore Ts'o #define EXT4_PBLK_CMASK(s, pblk) ((pblk) & \ 323f5a44db5STheodore Ts'o ~((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 324f5a44db5STheodore Ts'o #define EXT4_LBLK_CMASK(s, lblk) ((lblk) & \ 325f5a44db5STheodore Ts'o ~((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 3268fcc3a58SEric Whitney /* Fill in the low bits to get the last block of the cluster */ 3278fcc3a58SEric Whitney #define EXT4_LBLK_CFILL(sbi, lblk) ((lblk) | \ 3288fcc3a58SEric Whitney ((ext4_lblk_t) (sbi)->s_cluster_ratio - 1)) 329f5a44db5STheodore Ts'o /* Get the cluster offset */ 330f5a44db5STheodore Ts'o #define EXT4_PBLK_COFF(s, pblk) ((pblk) & \ 331f5a44db5STheodore Ts'o ((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 332f5a44db5STheodore Ts'o #define EXT4_LBLK_COFF(s, lblk) ((lblk) & \ 333f5a44db5STheodore Ts'o ((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 334d5b8f310STheodore Ts'o 3353dcf5451SChristoph Hellwig /* 3363dcf5451SChristoph Hellwig * Structure of a blocks group descriptor 3373dcf5451SChristoph Hellwig */ 3383dcf5451SChristoph Hellwig struct ext4_group_desc 3393dcf5451SChristoph Hellwig { 3403dcf5451SChristoph Hellwig __le32 bg_block_bitmap_lo; /* Blocks bitmap block */ 3413dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ 3423dcf5451SChristoph Hellwig __le32 bg_inode_table_lo; /* Inodes table block */ 343560671a0SAneesh Kumar K.V __le16 bg_free_blocks_count_lo;/* Free blocks count */ 344560671a0SAneesh Kumar K.V __le16 bg_free_inodes_count_lo;/* Free inodes count */ 345560671a0SAneesh Kumar K.V __le16 bg_used_dirs_count_lo; /* Directories count */ 3463dcf5451SChristoph Hellwig __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ 347e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_lo; /* Exclude bitmap for snapshots */ 348e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+bbitmap) LE */ 349e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+ibitmap) LE */ 350560671a0SAneesh Kumar K.V __le16 bg_itable_unused_lo; /* Unused inodes count */ 3513dcf5451SChristoph Hellwig __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ 3523dcf5451SChristoph Hellwig __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ 3533dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ 3543dcf5451SChristoph Hellwig __le32 bg_inode_table_hi; /* Inodes table block MSB */ 3553dcf5451SChristoph Hellwig __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */ 3563dcf5451SChristoph Hellwig __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */ 3573dcf5451SChristoph Hellwig __le16 bg_used_dirs_count_hi; /* Directories count MSB */ 3583dcf5451SChristoph Hellwig __le16 bg_itable_unused_hi; /* Unused inodes count MSB */ 359e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_hi; /* Exclude bitmap block MSB */ 360e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+bbitmap) BE */ 361e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+ibitmap) BE */ 362e6153918SDarrick J. Wong __u32 bg_reserved; 3633dcf5451SChristoph Hellwig }; 3643dcf5451SChristoph Hellwig 36541a246d1SDarrick J. Wong #define EXT4_BG_INODE_BITMAP_CSUM_HI_END \ 36641a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \ 36741a246d1SDarrick J. Wong sizeof(__le16)) 36841a246d1SDarrick J. Wong #define EXT4_BG_BLOCK_BITMAP_CSUM_HI_END \ 36941a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \ 37041a246d1SDarrick J. Wong sizeof(__le16)) 37141a246d1SDarrick J. Wong 372772cb7c8SJose R. Santos /* 373772cb7c8SJose R. Santos * Structure of a flex block group info 374772cb7c8SJose R. Santos */ 375772cb7c8SJose R. Santos 376772cb7c8SJose R. Santos struct flex_groups { 37790ba983fSTheodore Ts'o atomic64_t free_clusters; 3789f24e420STheodore Ts'o atomic_t free_inodes; 3797d39db14STheodore Ts'o atomic_t used_dirs; 380772cb7c8SJose R. Santos }; 381772cb7c8SJose R. Santos 3823dcf5451SChristoph Hellwig #define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ 3833dcf5451SChristoph Hellwig #define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ 3843dcf5451SChristoph Hellwig #define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ 3853dcf5451SChristoph Hellwig 3863dcf5451SChristoph Hellwig /* 3873dcf5451SChristoph Hellwig * Macro-instructions used to manage group descriptors 3883dcf5451SChristoph Hellwig */ 3893dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE 32 3903dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE_64BIT 64 3913dcf5451SChristoph Hellwig #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE 3923dcf5451SChristoph Hellwig #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) 3933dcf5451SChristoph Hellwig #ifdef __KERNEL__ 3943dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) 395281b5995STheodore Ts'o # define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group) 3963dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) 3973dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) 3983dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) 3993dcf5451SChristoph Hellwig #else 4003dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) 4013dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) 4023dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) 4033dcf5451SChristoph Hellwig #endif 4043dcf5451SChristoph Hellwig 4053dcf5451SChristoph Hellwig /* 4063dcf5451SChristoph Hellwig * Constants relative to the data blocks 4073dcf5451SChristoph Hellwig */ 4083dcf5451SChristoph Hellwig #define EXT4_NDIR_BLOCKS 12 4093dcf5451SChristoph Hellwig #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS 4103dcf5451SChristoph Hellwig #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) 4113dcf5451SChristoph Hellwig #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) 4123dcf5451SChristoph Hellwig #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) 4133dcf5451SChristoph Hellwig 4143dcf5451SChristoph Hellwig /* 4153dcf5451SChristoph Hellwig * Inode flags 4163dcf5451SChristoph Hellwig */ 4173dcf5451SChristoph Hellwig #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ 4183dcf5451SChristoph Hellwig #define EXT4_UNRM_FL 0x00000002 /* Undelete */ 4193dcf5451SChristoph Hellwig #define EXT4_COMPR_FL 0x00000004 /* Compress file */ 4203dcf5451SChristoph Hellwig #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ 4213dcf5451SChristoph Hellwig #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ 4223dcf5451SChristoph Hellwig #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ 4233dcf5451SChristoph Hellwig #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ 4243dcf5451SChristoph Hellwig #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ 4253dcf5451SChristoph Hellwig /* Reserved for compression usage... */ 4263dcf5451SChristoph Hellwig #define EXT4_DIRTY_FL 0x00000100 4273dcf5451SChristoph Hellwig #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 4283dcf5451SChristoph Hellwig #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ 4293edc18d8STheodore Ts'o /* nb: was previously EXT2_ECOMPR_FL */ 4303edc18d8STheodore Ts'o #define EXT4_ENCRYPT_FL 0x00000800 /* encrypted file */ 4313dcf5451SChristoph Hellwig /* End compression flags --- maybe not all used */ 4323dcf5451SChristoph Hellwig #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ 4333dcf5451SChristoph Hellwig #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ 4343dcf5451SChristoph Hellwig #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ 4353dcf5451SChristoph Hellwig #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 4363dcf5451SChristoph Hellwig #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ 4373dcf5451SChristoph Hellwig #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 4383dcf5451SChristoph Hellwig #define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ 4393dcf5451SChristoph Hellwig #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ 440c93d8f88SEric Biggers #define EXT4_VERITY_FL 0x00100000 /* Verity protected inode */ 441f710b4b9STheodore Ts'o #define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ 4424337ecd1SEric Whitney /* 0x00400000 was formerly EXT4_EOFBLOCKS_FL */ 443b383a73fSIra Weiny 444b383a73fSIra Weiny #define EXT4_DAX_FL 0x02000000 /* Inode is DAX */ 445b383a73fSIra Weiny 44667cf5b09STao Ma #define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */ 4478b4953e1STheodore Ts'o #define EXT4_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ 448de8ff14cSEric Biggers #define EXT4_CASEFOLD_FL 0x40000000 /* Casefolded directory */ 4493dcf5451SChristoph Hellwig #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ 4503dcf5451SChristoph Hellwig 4512a12e147SEric Biggers /* User modifiable flags */ 4522a12e147SEric Biggers #define EXT4_FL_USER_MODIFIABLE (EXT4_SECRM_FL | \ 4532a12e147SEric Biggers EXT4_UNRM_FL | \ 4542a12e147SEric Biggers EXT4_COMPR_FL | \ 4552a12e147SEric Biggers EXT4_SYNC_FL | \ 4562a12e147SEric Biggers EXT4_IMMUTABLE_FL | \ 4572a12e147SEric Biggers EXT4_APPEND_FL | \ 4582a12e147SEric Biggers EXT4_NODUMP_FL | \ 4592a12e147SEric Biggers EXT4_NOATIME_FL | \ 4602a12e147SEric Biggers EXT4_JOURNAL_DATA_FL | \ 4612a12e147SEric Biggers EXT4_NOTAIL_FL | \ 4622a12e147SEric Biggers EXT4_DIRSYNC_FL | \ 4632a12e147SEric Biggers EXT4_TOPDIR_FL | \ 4642a12e147SEric Biggers EXT4_EXTENTS_FL | \ 4652a12e147SEric Biggers 0x00400000 /* EXT4_EOFBLOCKS_FL */ | \ 4662a12e147SEric Biggers EXT4_DAX_FL | \ 4672a12e147SEric Biggers EXT4_PROJINHERIT_FL | \ 4682a12e147SEric Biggers EXT4_CASEFOLD_FL) 4692a12e147SEric Biggers 4702a12e147SEric Biggers /* User visible flags */ 4712a12e147SEric Biggers #define EXT4_FL_USER_VISIBLE (EXT4_FL_USER_MODIFIABLE | \ 4722a12e147SEric Biggers EXT4_DIRTY_FL | \ 4732a12e147SEric Biggers EXT4_COMPRBLK_FL | \ 4742a12e147SEric Biggers EXT4_NOCOMPR_FL | \ 4752a12e147SEric Biggers EXT4_ENCRYPT_FL | \ 4762a12e147SEric Biggers EXT4_INDEX_FL | \ 4772a12e147SEric Biggers EXT4_VERITY_FL | \ 4782a12e147SEric Biggers EXT4_INLINE_DATA_FL) 4793dcf5451SChristoph Hellwig 4808fa43a81SDuane Griffin /* Flags that should be inherited by new inodes from their parent. */ 4818fa43a81SDuane Griffin #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\ 4821cd9f097STheodore Ts'o EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\ 4838fa43a81SDuane Griffin EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\ 484040cb378SLi Xi EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL |\ 485b383a73fSIra Weiny EXT4_PROJINHERIT_FL | EXT4_CASEFOLD_FL |\ 486b383a73fSIra Weiny EXT4_DAX_FL) 4878fa43a81SDuane Griffin 4882dc6b0d4SDuane Griffin /* Flags that are appropriate for regular files (all but dir-specific ones). */ 4897ddf79a1SWang Shilong #define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL | EXT4_CASEFOLD_FL |\ 4907ddf79a1SWang Shilong EXT4_PROJINHERIT_FL)) 4912dc6b0d4SDuane Griffin 4922dc6b0d4SDuane Griffin /* Flags that are appropriate for non-directories/regular files. */ 4932dc6b0d4SDuane Griffin #define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL) 4942dc6b0d4SDuane Griffin 495abdc644eSyangerkun /* The only flags that should be swapped */ 496abdc644eSyangerkun #define EXT4_FL_SHOULD_SWAP (EXT4_HUGE_FILE_FL | EXT4_EXTENTS_FL) 497abdc644eSyangerkun 498b383a73fSIra Weiny /* Flags which are mutually exclusive to DAX */ 499b383a73fSIra Weiny #define EXT4_DAX_MUT_EXCL (EXT4_VERITY_FL | EXT4_ENCRYPT_FL |\ 500aa2f7792SXiao Yang EXT4_JOURNAL_DATA_FL | EXT4_INLINE_DATA_FL) 501b383a73fSIra Weiny 5022dc6b0d4SDuane Griffin /* Mask out flags that are inappropriate for the given type of inode. */ 5032dc6b0d4SDuane Griffin static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags) 5042dc6b0d4SDuane Griffin { 5052dc6b0d4SDuane Griffin if (S_ISDIR(mode)) 5062dc6b0d4SDuane Griffin return flags; 5072dc6b0d4SDuane Griffin else if (S_ISREG(mode)) 5082dc6b0d4SDuane Griffin return flags & EXT4_REG_FLMASK; 5092dc6b0d4SDuane Griffin else 5102dc6b0d4SDuane Griffin return flags & EXT4_OTHER_FLMASK; 5112dc6b0d4SDuane Griffin } 5122dc6b0d4SDuane Griffin 51312e9b892SDmitry Monakhov /* 51412e9b892SDmitry Monakhov * Inode flags used for atomic set/get 51512e9b892SDmitry Monakhov */ 51612e9b892SDmitry Monakhov enum { 51712e9b892SDmitry Monakhov EXT4_INODE_SECRM = 0, /* Secure deletion */ 51812e9b892SDmitry Monakhov EXT4_INODE_UNRM = 1, /* Undelete */ 51912e9b892SDmitry Monakhov EXT4_INODE_COMPR = 2, /* Compress file */ 52012e9b892SDmitry Monakhov EXT4_INODE_SYNC = 3, /* Synchronous updates */ 52112e9b892SDmitry Monakhov EXT4_INODE_IMMUTABLE = 4, /* Immutable file */ 52212e9b892SDmitry Monakhov EXT4_INODE_APPEND = 5, /* writes to file may only append */ 52312e9b892SDmitry Monakhov EXT4_INODE_NODUMP = 6, /* do not dump file */ 52412e9b892SDmitry Monakhov EXT4_INODE_NOATIME = 7, /* do not update atime */ 52512e9b892SDmitry Monakhov /* Reserved for compression usage... */ 52612e9b892SDmitry Monakhov EXT4_INODE_DIRTY = 8, 52712e9b892SDmitry Monakhov EXT4_INODE_COMPRBLK = 9, /* One or more compressed clusters */ 52812e9b892SDmitry Monakhov EXT4_INODE_NOCOMPR = 10, /* Don't compress */ 529f542fbe8STheodore Ts'o EXT4_INODE_ENCRYPT = 11, /* Encrypted file */ 53012e9b892SDmitry Monakhov /* End compression flags --- maybe not all used */ 53112e9b892SDmitry Monakhov EXT4_INODE_INDEX = 12, /* hash-indexed directory */ 53212e9b892SDmitry Monakhov EXT4_INODE_IMAGIC = 13, /* AFS directory */ 53312e9b892SDmitry Monakhov EXT4_INODE_JOURNAL_DATA = 14, /* file data should be journaled */ 53412e9b892SDmitry Monakhov EXT4_INODE_NOTAIL = 15, /* file tail should not be merged */ 53512e9b892SDmitry Monakhov EXT4_INODE_DIRSYNC = 16, /* dirsync behaviour (directories only) */ 53612e9b892SDmitry Monakhov EXT4_INODE_TOPDIR = 17, /* Top of directory hierarchies*/ 53712e9b892SDmitry Monakhov EXT4_INODE_HUGE_FILE = 18, /* Set to each huge file */ 53812e9b892SDmitry Monakhov EXT4_INODE_EXTENTS = 19, /* Inode uses extents */ 539c93d8f88SEric Biggers EXT4_INODE_VERITY = 20, /* Verity protected inode */ 54012e9b892SDmitry Monakhov EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */ 5414337ecd1SEric Whitney /* 22 was formerly EXT4_INODE_EOFBLOCKS */ 542b383a73fSIra Weiny EXT4_INODE_DAX = 25, /* Inode is DAX */ 54367cf5b09STao Ma EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */ 5448b4953e1STheodore Ts'o EXT4_INODE_PROJINHERIT = 29, /* Create with parents projid */ 545de8ff14cSEric Biggers EXT4_INODE_CASEFOLD = 30, /* Casefolded directory */ 54612e9b892SDmitry Monakhov EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */ 54712e9b892SDmitry Monakhov }; 54812e9b892SDmitry Monakhov 54912e9b892SDmitry Monakhov /* 5509a4c8019SCarlos Maiolino * Since it's pretty easy to mix up bit numbers and hex values, we use a 5519a4c8019SCarlos Maiolino * build-time check to make sure that EXT4_XXX_FL is consistent with respect to 5529a4c8019SCarlos Maiolino * EXT4_INODE_XXX. If all is well, the macros will be dropped, so, it won't cost 5539a4c8019SCarlos Maiolino * any extra space in the compiled kernel image, otherwise, the build will fail. 5549a4c8019SCarlos Maiolino * It's important that these values are the same, since we are using 5559a4c8019SCarlos Maiolino * EXT4_INODE_XXX to test for flag values, but EXT4_XXX_FL must be consistent 5569a4c8019SCarlos Maiolino * with the values of FS_XXX_FL defined in include/linux/fs.h and the on-disk 5579a4c8019SCarlos Maiolino * values found in ext2, ext3 and ext4 filesystems, and of course the values 5589a4c8019SCarlos Maiolino * defined in e2fsprogs. 55912e9b892SDmitry Monakhov * 56012e9b892SDmitry Monakhov * It's not paranoia if the Murphy's Law really *is* out to get you. :-) 56112e9b892SDmitry Monakhov */ 5629a4c8019SCarlos Maiolino #define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG)) 5639a4c8019SCarlos Maiolino #define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG)) 5649a4c8019SCarlos Maiolino 56512e9b892SDmitry Monakhov static inline void ext4_check_flag_values(void) 56612e9b892SDmitry Monakhov { 56712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SECRM); 56812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(UNRM); 56912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPR); 57012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SYNC); 57112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMMUTABLE); 57212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(APPEND); 57312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NODUMP); 57412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOATIME); 57512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRTY); 57612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPRBLK); 57712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOCOMPR); 5783edc18d8STheodore Ts'o CHECK_FLAG_VALUE(ENCRYPT); 57912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(INDEX); 58012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMAGIC); 58112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(JOURNAL_DATA); 58212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOTAIL); 58312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRSYNC); 58412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(TOPDIR); 58512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(HUGE_FILE); 58612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EXTENTS); 587c93d8f88SEric Biggers CHECK_FLAG_VALUE(VERITY); 58812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EA_INODE); 58967cf5b09STao Ma CHECK_FLAG_VALUE(INLINE_DATA); 5908b4953e1STheodore Ts'o CHECK_FLAG_VALUE(PROJINHERIT); 591de8ff14cSEric Biggers CHECK_FLAG_VALUE(CASEFOLD); 59212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(RESERVED); 59312e9b892SDmitry Monakhov } 59412e9b892SDmitry Monakhov 5953dcf5451SChristoph Hellwig /* Used to pass group descriptor data when online resize is done */ 5963dcf5451SChristoph Hellwig struct ext4_new_group_input { 5973dcf5451SChristoph Hellwig __u32 group; /* Group number for this data */ 5983dcf5451SChristoph Hellwig __u64 block_bitmap; /* Absolute block number of block bitmap */ 5993dcf5451SChristoph Hellwig __u64 inode_bitmap; /* Absolute block number of inode bitmap */ 6003dcf5451SChristoph Hellwig __u64 inode_table; /* Absolute block number of inode table start */ 6013dcf5451SChristoph Hellwig __u32 blocks_count; /* Total number of blocks in this group */ 6023dcf5451SChristoph Hellwig __u16 reserved_blocks; /* Number of reserved blocks in this group */ 6033dcf5451SChristoph Hellwig __u16 unused; 6043dcf5451SChristoph Hellwig }; 6053dcf5451SChristoph Hellwig 6064d92dc0fSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 6074d92dc0fSBen Hutchings struct compat_ext4_new_group_input { 6084d92dc0fSBen Hutchings u32 group; 6094d92dc0fSBen Hutchings compat_u64 block_bitmap; 6104d92dc0fSBen Hutchings compat_u64 inode_bitmap; 6114d92dc0fSBen Hutchings compat_u64 inode_table; 6124d92dc0fSBen Hutchings u32 blocks_count; 6134d92dc0fSBen Hutchings u16 reserved_blocks; 6144d92dc0fSBen Hutchings u16 unused; 6154d92dc0fSBen Hutchings }; 6164d92dc0fSBen Hutchings #endif 6174d92dc0fSBen Hutchings 6183dcf5451SChristoph Hellwig /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ 6193dcf5451SChristoph Hellwig struct ext4_new_group_data { 6203dcf5451SChristoph Hellwig __u32 group; 6213dcf5451SChristoph Hellwig __u64 block_bitmap; 6223dcf5451SChristoph Hellwig __u64 inode_bitmap; 6233dcf5451SChristoph Hellwig __u64 inode_table; 6243dcf5451SChristoph Hellwig __u32 blocks_count; 6253dcf5451SChristoph Hellwig __u16 reserved_blocks; 626d77147ffSharshads __u16 mdata_blocks; 627d77147ffSharshads __u32 free_clusters_count; 6283dcf5451SChristoph Hellwig }; 6293dcf5451SChristoph Hellwig 63033afdcc5SYongqiang Yang /* Indexes used to index group tables in ext4_new_group_data */ 63133afdcc5SYongqiang Yang enum { 63233afdcc5SYongqiang Yang BLOCK_BITMAP = 0, /* block bitmap */ 63333afdcc5SYongqiang Yang INODE_BITMAP, /* inode bitmap */ 63433afdcc5SYongqiang Yang INODE_TABLE, /* inode tables */ 63533afdcc5SYongqiang Yang GROUP_TABLE_COUNT, 63633afdcc5SYongqiang Yang }; 63733afdcc5SYongqiang Yang 6383dcf5451SChristoph Hellwig /* 63979e83036SEric Sandeen * Flags used by ext4_map_blocks() 6403dcf5451SChristoph Hellwig */ 641556615dcSLukas Czerner /* Allocate any needed blocks and/or convert an unwritten 642c2177057STheodore Ts'o extent to be an initialized ext4 */ 6432ac3b6e0STheodore Ts'o #define EXT4_GET_BLOCKS_CREATE 0x0001 644556615dcSLukas Czerner /* Request the creation of an unwritten extent */ 645556615dcSLukas Czerner #define EXT4_GET_BLOCKS_UNWRIT_EXT 0x0002 646556615dcSLukas Czerner #define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT (EXT4_GET_BLOCKS_UNWRIT_EXT|\ 647c2177057STheodore Ts'o EXT4_GET_BLOCKS_CREATE) 64827dd4385SLukas Czerner /* Caller is from the delayed allocation writeout path 64927dd4385SLukas Czerner * finally doing the actual allocation of delayed blocks */ 65003f5d8bcSJan Kara #define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004 6510031462bSMingming Cao /* caller is from the direct IO path, request to creation of an 652556615dcSLukas Czerner unwritten extents if not allocated, split the unwritten 6530031462bSMingming Cao extent if blocks has been preallocated already*/ 654c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_PRE_IO 0x0008 6551296cc85SAneesh Kumar K.V #define EXT4_GET_BLOCKS_CONVERT 0x0010 656c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\ 657556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 658c7064ef1SJiaying Zhang /* Convert extent to initialized after IO complete */ 659c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\ 660556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 66127dd4385SLukas Czerner /* Eventual metadata allocation (due to growing extent tree) 66227dd4385SLukas Czerner * should not fail, so try to use reserved blocks for that.*/ 66327dd4385SLukas Czerner #define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020 664556b27abSVivek Haldar /* Don't normalize allocation size (used for fallocate) */ 665556b27abSVivek Haldar #define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040 666b8a86845SLukas Czerner /* Convert written extents to unwritten */ 6672dcba478SJan Kara #define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN 0x0100 668c86d8db3SJan Kara /* Write zeros to newly created written extents */ 669c86d8db3SJan Kara #define EXT4_GET_BLOCKS_ZERO 0x0200 670c86d8db3SJan Kara #define EXT4_GET_BLOCKS_CREATE_ZERO (EXT4_GET_BLOCKS_CREATE |\ 671c86d8db3SJan Kara EXT4_GET_BLOCKS_ZERO) 672ee0876bcSJan Kara /* Caller will submit data before dropping transaction handle. This 673ee0876bcSJan Kara * allows jbd2 to avoid submitting data before commit. */ 674ee0876bcSJan Kara #define EXT4_GET_BLOCKS_IO_SUBMIT 0x0400 6753dcf5451SChristoph Hellwig 6763dcf5451SChristoph Hellwig /* 6777869a4a6STheodore Ts'o * The bit position of these flags must not overlap with any of the 678ed8a1a76STheodore Ts'o * EXT4_GET_BLOCKS_*. They are used by ext4_find_extent(), 679107a7bd3STheodore Ts'o * read_extent_tree_block(), ext4_split_extent_at(), 6807869a4a6STheodore Ts'o * ext4_ext_insert_extent(), and ext4_ext_create_new_leaf(). 6817869a4a6STheodore Ts'o * EXT4_EX_NOCACHE is used to indicate that the we shouldn't be 6827869a4a6STheodore Ts'o * caching the extents when reading from the extent tree while a 6837869a4a6STheodore Ts'o * truncate or punch hole operation is in progress. 684107a7bd3STheodore Ts'o */ 685d26e2c4dSTheodore Ts'o #define EXT4_EX_NOCACHE 0x40000000 686d26e2c4dSTheodore Ts'o #define EXT4_EX_FORCE_CACHE 0x20000000 68773c384c0STheodore Ts'o #define EXT4_EX_NOFAIL 0x10000000 688107a7bd3STheodore Ts'o 689107a7bd3STheodore Ts'o /* 690e6362609STheodore Ts'o * Flags used by ext4_free_blocks 691e6362609STheodore Ts'o */ 692e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_METADATA 0x0001 693e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_FORGET 0x0002 6941f2acb60STheodore Ts'o #define EXT4_FREE_BLOCKS_VALIDATED 0x0004 6957132de74SMaxim Patlasov #define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008 69684130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010 69784130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020 6989fe67149SEric Whitney #define EXT4_FREE_BLOCKS_RERESERVE_CLUSTER 0x0040 699e6362609STheodore Ts'o 700e6362609STheodore Ts'o /* 7013dcf5451SChristoph Hellwig * ioctl commands 7023dcf5451SChristoph Hellwig */ 7033dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION _IOR('f', 3, long) 7043dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION _IOW('f', 4, long) 7053dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION 7063dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION 7073dcf5451SChristoph Hellwig #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) 7083dcf5451SChristoph Hellwig #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) 7098eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) 7108eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) 7118eea80d5STheodore Ts'o #define EXT4_IOC_MIGRATE _IO('f', 9) 712ccd2506bSTheodore Ts'o /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */ 7138eea80d5STheodore Ts'o /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ 714ccd2506bSTheodore Ts'o #define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12) 715748de673SAkira Fujita #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent) 71619c5246dSYongqiang Yang #define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) 717393d1d1dSDr. Tilmann Bubeck #define EXT4_IOC_SWAP_BOOT _IO('f', 17) 7187869a4a6STheodore Ts'o #define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18) 719b0c013e2STheodore Ts'o /* ioctl codes 19--39 are reserved for fscrypt */ 720b0c013e2STheodore Ts'o #define EXT4_IOC_CLEAR_ES_CACHE _IO('f', 40) 7211ad3ea6eSTheodore Ts'o #define EXT4_IOC_GETSTATE _IOW('f', 41, __u32) 722bb5835edSTheodore Ts'o #define EXT4_IOC_GET_ES_CACHE _IOWR('f', 42, struct fiemap) 723351a0a3fSLeah Rumancik #define EXT4_IOC_CHECKPOINT _IOW('f', 43, __u32) 7243dcf5451SChristoph Hellwig 725e9be2ac7STheodore Ts'o #define EXT4_IOC_SHUTDOWN _IOR ('X', 125, __u32) 726783d9485STheodore Ts'o 727783d9485STheodore Ts'o /* 728783d9485STheodore Ts'o * Flags for going down operation 729783d9485STheodore Ts'o */ 730783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_DEFAULT 0x0 /* going down */ 731783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */ 732783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */ 733783d9485STheodore Ts'o 7341ad3ea6eSTheodore Ts'o /* 7351ad3ea6eSTheodore Ts'o * Flags returned by EXT4_IOC_GETSTATE 7361ad3ea6eSTheodore Ts'o * 7371ad3ea6eSTheodore Ts'o * We only expose to userspace a subset of the state flags in 7381ad3ea6eSTheodore Ts'o * i_state_flags 7391ad3ea6eSTheodore Ts'o */ 7401ad3ea6eSTheodore Ts'o #define EXT4_STATE_FLAG_EXT_PRECACHED 0x00000001 7411ad3ea6eSTheodore Ts'o #define EXT4_STATE_FLAG_NEW 0x00000002 7421ad3ea6eSTheodore Ts'o #define EXT4_STATE_FLAG_NEWENTRY 0x00000004 7431ad3ea6eSTheodore Ts'o #define EXT4_STATE_FLAG_DA_ALLOC_CLOSE 0x00000008 744783d9485STheodore Ts'o 745351a0a3fSLeah Rumancik /* flags for ioctl EXT4_IOC_CHECKPOINT */ 746351a0a3fSLeah Rumancik #define EXT4_IOC_CHECKPOINT_FLAG_DISCARD 0x1 747351a0a3fSLeah Rumancik #define EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT 0x2 748351a0a3fSLeah Rumancik #define EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN 0x4 749351a0a3fSLeah Rumancik #define EXT4_IOC_CHECKPOINT_FLAG_VALID (EXT4_IOC_CHECKPOINT_FLAG_DISCARD | \ 750351a0a3fSLeah Rumancik EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT | \ 751351a0a3fSLeah Rumancik EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN) 752351a0a3fSLeah Rumancik 753899ad0ceSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 7543dcf5451SChristoph Hellwig /* 7553dcf5451SChristoph Hellwig * ioctl commands in 32 bit emulation 7563dcf5451SChristoph Hellwig */ 7573dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) 7583dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) 7593dcf5451SChristoph Hellwig #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) 7603dcf5451SChristoph Hellwig #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) 7613dcf5451SChristoph Hellwig #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) 7624d92dc0fSBen Hutchings #define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input) 7633dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION 7643dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION 765899ad0ceSBen Hutchings #endif 7663dcf5451SChristoph Hellwig 767bb5835edSTheodore Ts'o /* 768bb5835edSTheodore Ts'o * Returned by EXT4_IOC_GET_ES_CACHE as an additional possible flag. 769bb5835edSTheodore Ts'o * It indicates that the entry in extent status cache is for a hole. 770bb5835edSTheodore Ts'o */ 771bb5835edSTheodore Ts'o #define EXT4_FIEMAP_EXTENT_HOLE 0x08000000 772bb5835edSTheodore Ts'o 773b595076aSUwe Kleine-König /* Max physical block we can address w/o extents */ 774fb0a387dSEric Sandeen #define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF 775fb0a387dSEric Sandeen 776bcd8e91fSTheodore Ts'o /* Max logical block we can support */ 7779f44eda1SRitesh Harjani #define EXT4_MAX_LOGICAL_BLOCK 0xFFFFFFFE 778bcd8e91fSTheodore Ts'o 7793dcf5451SChristoph Hellwig /* 7803dcf5451SChristoph Hellwig * Structure of an inode on the disk 7813dcf5451SChristoph Hellwig */ 7823dcf5451SChristoph Hellwig struct ext4_inode { 7833dcf5451SChristoph Hellwig __le16 i_mode; /* File mode */ 7843dcf5451SChristoph Hellwig __le16 i_uid; /* Low 16 bits of Owner Uid */ 7853dcf5451SChristoph Hellwig __le32 i_size_lo; /* Size in bytes */ 7863dcf5451SChristoph Hellwig __le32 i_atime; /* Access time */ 7873dcf5451SChristoph Hellwig __le32 i_ctime; /* Inode Change time */ 7883dcf5451SChristoph Hellwig __le32 i_mtime; /* Modification time */ 7893dcf5451SChristoph Hellwig __le32 i_dtime; /* Deletion Time */ 7903dcf5451SChristoph Hellwig __le16 i_gid; /* Low 16 bits of Group Id */ 7913dcf5451SChristoph Hellwig __le16 i_links_count; /* Links count */ 7923dcf5451SChristoph Hellwig __le32 i_blocks_lo; /* Blocks count */ 7933dcf5451SChristoph Hellwig __le32 i_flags; /* File flags */ 7943dcf5451SChristoph Hellwig union { 7953dcf5451SChristoph Hellwig struct { 7963dcf5451SChristoph Hellwig __le32 l_i_version; 7973dcf5451SChristoph Hellwig } linux1; 7983dcf5451SChristoph Hellwig struct { 7993dcf5451SChristoph Hellwig __u32 h_i_translator; 8003dcf5451SChristoph Hellwig } hurd1; 8013dcf5451SChristoph Hellwig struct { 8023dcf5451SChristoph Hellwig __u32 m_i_reserved1; 8033dcf5451SChristoph Hellwig } masix1; 8043dcf5451SChristoph Hellwig } osd1; /* OS dependent 1 */ 8053dcf5451SChristoph Hellwig __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ 8063dcf5451SChristoph Hellwig __le32 i_generation; /* File version (for NFS) */ 8073dcf5451SChristoph Hellwig __le32 i_file_acl_lo; /* File ACL */ 8083dcf5451SChristoph Hellwig __le32 i_size_high; 8093dcf5451SChristoph Hellwig __le32 i_obso_faddr; /* Obsoleted fragment address */ 8103dcf5451SChristoph Hellwig union { 8113dcf5451SChristoph Hellwig struct { 8123dcf5451SChristoph Hellwig __le16 l_i_blocks_high; /* were l_i_reserved1 */ 8133dcf5451SChristoph Hellwig __le16 l_i_file_acl_high; 8143dcf5451SChristoph Hellwig __le16 l_i_uid_high; /* these 2 fields */ 8153dcf5451SChristoph Hellwig __le16 l_i_gid_high; /* were reserved2[0] */ 816e6153918SDarrick J. Wong __le16 l_i_checksum_lo;/* crc32c(uuid+inum+inode) LE */ 817e6153918SDarrick J. Wong __le16 l_i_reserved; 8183dcf5451SChristoph Hellwig } linux2; 8193dcf5451SChristoph Hellwig struct { 8203dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 8213dcf5451SChristoph Hellwig __u16 h_i_mode_high; 8223dcf5451SChristoph Hellwig __u16 h_i_uid_high; 8233dcf5451SChristoph Hellwig __u16 h_i_gid_high; 8243dcf5451SChristoph Hellwig __u32 h_i_author; 8253dcf5451SChristoph Hellwig } hurd2; 8263dcf5451SChristoph Hellwig struct { 8273dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 8283dcf5451SChristoph Hellwig __le16 m_i_file_acl_high; 8293dcf5451SChristoph Hellwig __u32 m_i_reserved2[2]; 8303dcf5451SChristoph Hellwig } masix2; 8313dcf5451SChristoph Hellwig } osd2; /* OS dependent 2 */ 8323dcf5451SChristoph Hellwig __le16 i_extra_isize; 833e6153918SDarrick J. Wong __le16 i_checksum_hi; /* crc32c(uuid+inum+inode) BE */ 8343dcf5451SChristoph Hellwig __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ 8353dcf5451SChristoph Hellwig __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ 8363dcf5451SChristoph Hellwig __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ 8373dcf5451SChristoph Hellwig __le32 i_crtime; /* File Creation time */ 8383dcf5451SChristoph Hellwig __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ 8393dcf5451SChristoph Hellwig __le32 i_version_hi; /* high 32 bits for 64-bit version */ 8408b4953e1STheodore Ts'o __le32 i_projid; /* Project ID */ 8413dcf5451SChristoph Hellwig }; 8423dcf5451SChristoph Hellwig 843748de673SAkira Fujita struct move_extent { 844748de673SAkira Fujita __u32 reserved; /* should be zero */ 845748de673SAkira Fujita __u32 donor_fd; /* donor file descriptor */ 846748de673SAkira Fujita __u64 orig_start; /* logical start offset in block for orig */ 847748de673SAkira Fujita __u64 donor_start; /* logical start offset in block for donor */ 848748de673SAkira Fujita __u64 len; /* block length to be moved */ 849748de673SAkira Fujita __u64 moved_len; /* moved block length */ 850748de673SAkira Fujita }; 8513dcf5451SChristoph Hellwig 8523dcf5451SChristoph Hellwig #define EXT4_EPOCH_BITS 2 8533dcf5451SChristoph Hellwig #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) 8543dcf5451SChristoph Hellwig #define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) 8553dcf5451SChristoph Hellwig 8563dcf5451SChristoph Hellwig /* 8573dcf5451SChristoph Hellwig * Extended fields will fit into an inode if the filesystem was formatted 8583dcf5451SChristoph Hellwig * with large inodes (-I 256 or larger) and there are not currently any EAs 8593dcf5451SChristoph Hellwig * consuming all of the available space. For new inodes we always reserve 8603dcf5451SChristoph Hellwig * enough space for the kernel's known extended fields, but for inodes 8613dcf5451SChristoph Hellwig * created with an old kernel this might not have been the case. None of 8623dcf5451SChristoph Hellwig * the extended inode fields is critical for correct filesystem operation. 8633dcf5451SChristoph Hellwig * This macro checks if a certain field fits in the inode. Note that 8643dcf5451SChristoph Hellwig * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize 8653dcf5451SChristoph Hellwig */ 8663dcf5451SChristoph Hellwig #define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \ 8673dcf5451SChristoph Hellwig ((offsetof(typeof(*ext4_inode), field) + \ 8683dcf5451SChristoph Hellwig sizeof((ext4_inode)->field)) \ 8693dcf5451SChristoph Hellwig <= (EXT4_GOOD_OLD_INODE_SIZE + \ 8703dcf5451SChristoph Hellwig (einode)->i_extra_isize)) \ 8713dcf5451SChristoph Hellwig 872a4dad1aeSDavid Turner /* 873a4dad1aeSDavid Turner * We use an encoding that preserves the times for extra epoch "00": 874a4dad1aeSDavid Turner * 875a4dad1aeSDavid Turner * extra msb of adjust for signed 876a4dad1aeSDavid Turner * epoch 32-bit 32-bit tv_sec to 877a4dad1aeSDavid Turner * bits time decoded 64-bit tv_sec 64-bit tv_sec valid time range 878a4dad1aeSDavid Turner * 0 0 1 -0x80000000..-0x00000001 0x000000000 1901-12-13..1969-12-31 879a4dad1aeSDavid Turner * 0 0 0 0x000000000..0x07fffffff 0x000000000 1970-01-01..2038-01-19 880a4dad1aeSDavid Turner * 0 1 1 0x080000000..0x0ffffffff 0x100000000 2038-01-19..2106-02-07 881a4dad1aeSDavid Turner * 0 1 0 0x100000000..0x17fffffff 0x100000000 2106-02-07..2174-02-25 882a4dad1aeSDavid Turner * 1 0 1 0x180000000..0x1ffffffff 0x200000000 2174-02-25..2242-03-16 883a4dad1aeSDavid Turner * 1 0 0 0x200000000..0x27fffffff 0x200000000 2242-03-16..2310-04-04 884a4dad1aeSDavid Turner * 1 1 1 0x280000000..0x2ffffffff 0x300000000 2310-04-04..2378-04-22 885a4dad1aeSDavid Turner * 1 1 0 0x300000000..0x37fffffff 0x300000000 2378-04-22..2446-05-10 886a4dad1aeSDavid Turner * 887a4dad1aeSDavid Turner * Note that previous versions of the kernel on 64-bit systems would 888a4dad1aeSDavid Turner * incorrectly use extra epoch bits 1,1 for dates between 1901 and 889a4dad1aeSDavid Turner * 1970. e2fsck will correct this, assuming that it is run on the 890a4dad1aeSDavid Turner * affected filesystem before 2242. 891a4dad1aeSDavid Turner */ 892a4dad1aeSDavid Turner 8937b62b293SArnd Bergmann static inline __le32 ext4_encode_extra_time(struct timespec64 *time) 8943dcf5451SChristoph Hellwig { 8957b62b293SArnd Bergmann u32 extra =((time->tv_sec - (s32)time->tv_sec) >> 32) & EXT4_EPOCH_MASK; 896a4dad1aeSDavid Turner return cpu_to_le32(extra | (time->tv_nsec << EXT4_EPOCH_BITS)); 8973dcf5451SChristoph Hellwig } 8983dcf5451SChristoph Hellwig 8997b62b293SArnd Bergmann static inline void ext4_decode_extra_time(struct timespec64 *time, 9007b62b293SArnd Bergmann __le32 extra) 9013dcf5451SChristoph Hellwig { 902cd2d9922STheodore Ts'o if (unlikely(extra & cpu_to_le32(EXT4_EPOCH_MASK))) 903a4dad1aeSDavid Turner time->tv_sec += (u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32; 904c1fccc06STheodore Ts'o time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; 9053dcf5451SChristoph Hellwig } 9063dcf5451SChristoph Hellwig 9073dcf5451SChristoph Hellwig #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ 9083dcf5451SChristoph Hellwig do { \ 90995582b00SDeepa Dinamani if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) {\ 9104881c497SDeepa Dinamani (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ 9113dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 9127b62b293SArnd Bergmann ext4_encode_extra_time(&(inode)->xtime); \ 91395582b00SDeepa Dinamani } \ 914cba465b4SDeepa Dinamani else \ 9154881c497SDeepa Dinamani (raw_inode)->xtime = cpu_to_le32(clamp_t(int32_t, (inode)->xtime.tv_sec, S32_MIN, S32_MAX)); \ 9163dcf5451SChristoph Hellwig } while (0) 9173dcf5451SChristoph Hellwig 9183dcf5451SChristoph Hellwig #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ 9193dcf5451SChristoph Hellwig do { \ 9203dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 9213dcf5451SChristoph Hellwig (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \ 9223dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 9233dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 9243dcf5451SChristoph Hellwig ext4_encode_extra_time(&(einode)->xtime); \ 9253dcf5451SChristoph Hellwig } while (0) 9263dcf5451SChristoph Hellwig 9273dcf5451SChristoph Hellwig #define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \ 9283dcf5451SChristoph Hellwig do { \ 9293dcf5451SChristoph Hellwig (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \ 93095582b00SDeepa Dinamani if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) { \ 9317b62b293SArnd Bergmann ext4_decode_extra_time(&(inode)->xtime, \ 9323dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 93395582b00SDeepa Dinamani } \ 934af0b44a1SEric Sandeen else \ 935af0b44a1SEric Sandeen (inode)->xtime.tv_nsec = 0; \ 9363dcf5451SChristoph Hellwig } while (0) 9373dcf5451SChristoph Hellwig 93895582b00SDeepa Dinamani 9393dcf5451SChristoph Hellwig #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ 9403dcf5451SChristoph Hellwig do { \ 9413dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 9423dcf5451SChristoph Hellwig (einode)->xtime.tv_sec = \ 9433dcf5451SChristoph Hellwig (signed)le32_to_cpu((raw_inode)->xtime); \ 94419ea8060STheodore Ts'o else \ 94519ea8060STheodore Ts'o (einode)->xtime.tv_sec = 0; \ 9463dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 9473dcf5451SChristoph Hellwig ext4_decode_extra_time(&(einode)->xtime, \ 9483dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 949af0b44a1SEric Sandeen else \ 950af0b44a1SEric Sandeen (einode)->xtime.tv_nsec = 0; \ 9513dcf5451SChristoph Hellwig } while (0) 9523dcf5451SChristoph Hellwig 9533dcf5451SChristoph Hellwig #define i_disk_version osd1.linux1.l_i_version 9543dcf5451SChristoph Hellwig 9553dcf5451SChristoph Hellwig #if defined(__KERNEL__) || defined(__linux__) 9563dcf5451SChristoph Hellwig #define i_reserved1 osd1.linux1.l_i_reserved1 9573dcf5451SChristoph Hellwig #define i_file_acl_high osd2.linux2.l_i_file_acl_high 9583dcf5451SChristoph Hellwig #define i_blocks_high osd2.linux2.l_i_blocks_high 9593dcf5451SChristoph Hellwig #define i_uid_low i_uid 9603dcf5451SChristoph Hellwig #define i_gid_low i_gid 9613dcf5451SChristoph Hellwig #define i_uid_high osd2.linux2.l_i_uid_high 9623dcf5451SChristoph Hellwig #define i_gid_high osd2.linux2.l_i_gid_high 963e6153918SDarrick J. Wong #define i_checksum_lo osd2.linux2.l_i_checksum_lo 9643dcf5451SChristoph Hellwig 9653dcf5451SChristoph Hellwig #elif defined(__GNU__) 9663dcf5451SChristoph Hellwig 9673dcf5451SChristoph Hellwig #define i_translator osd1.hurd1.h_i_translator 9683dcf5451SChristoph Hellwig #define i_uid_high osd2.hurd2.h_i_uid_high 9693dcf5451SChristoph Hellwig #define i_gid_high osd2.hurd2.h_i_gid_high 9703dcf5451SChristoph Hellwig #define i_author osd2.hurd2.h_i_author 9713dcf5451SChristoph Hellwig 9723dcf5451SChristoph Hellwig #elif defined(__masix__) 9733dcf5451SChristoph Hellwig 9743dcf5451SChristoph Hellwig #define i_reserved1 osd1.masix1.m_i_reserved1 9753dcf5451SChristoph Hellwig #define i_file_acl_high osd2.masix2.m_i_file_acl_high 9763dcf5451SChristoph Hellwig #define i_reserved2 osd2.masix2.m_i_reserved2 9773dcf5451SChristoph Hellwig 9783dcf5451SChristoph Hellwig #endif /* defined(__KERNEL__) || defined(__linux__) */ 9793dcf5451SChristoph Hellwig 980c0677e6dSZheng Liu #include "extents_status.h" 9816866d7b3SHarshad Shirwadkar #include "fast_commit.h" 982c0677e6dSZheng Liu 983d444c3c3STheodore Ts'o /* 984daf647d2STheodore Ts'o * Lock subclasses for i_data_sem in the ext4_inode_info structure. 985daf647d2STheodore Ts'o * 986daf647d2STheodore Ts'o * These are needed to avoid lockdep false positives when we need to 987daf647d2STheodore Ts'o * allocate blocks to the quota inode during ext4_map_blocks(), while 988daf647d2STheodore Ts'o * holding i_data_sem for a normal (non-quota) inode. Since we don't 989daf647d2STheodore Ts'o * do quota tracking for the quota inode, this avoids deadlock (as 990daf647d2STheodore Ts'o * well as infinite recursion, since it isn't turtles all the way 991daf647d2STheodore Ts'o * down...) 992daf647d2STheodore Ts'o * 993daf647d2STheodore Ts'o * I_DATA_SEM_NORMAL - Used for most inodes 994daf647d2STheodore Ts'o * I_DATA_SEM_OTHER - Used by move_inode.c for the second normal inode 995daf647d2STheodore Ts'o * where the second inode has larger inode number 996daf647d2STheodore Ts'o * than the first 997daf647d2STheodore Ts'o * I_DATA_SEM_QUOTA - Used for quota inodes only 998daf647d2STheodore Ts'o */ 999daf647d2STheodore Ts'o enum { 1000daf647d2STheodore Ts'o I_DATA_SEM_NORMAL = 0, 1001daf647d2STheodore Ts'o I_DATA_SEM_OTHER, 1002daf647d2STheodore Ts'o I_DATA_SEM_QUOTA, 1003daf647d2STheodore Ts'o }; 1004daf647d2STheodore Ts'o 1005daf647d2STheodore Ts'o 1006daf647d2STheodore Ts'o /* 1007d444c3c3STheodore Ts'o * fourth extended file system inode data in memory 1008d444c3c3STheodore Ts'o */ 1009d444c3c3STheodore Ts'o struct ext4_inode_info { 1010d444c3c3STheodore Ts'o __le32 i_data[15]; /* unconverted */ 1011d444c3c3STheodore Ts'o __u32 i_dtime; 101212e9b892SDmitry Monakhov ext4_fsblk_t i_file_acl; 1013d444c3c3STheodore Ts'o 1014d444c3c3STheodore Ts'o /* 1015d444c3c3STheodore Ts'o * i_block_group is the number of the block group which contains 1016d444c3c3STheodore Ts'o * this file's inode. Constant across the lifetime of the inode, 1017a627b0a7SEric Whitney * it is used for making block allocation decisions - we try to 1018d444c3c3STheodore Ts'o * place a file's data blocks near its inode block, and new inodes 1019d444c3c3STheodore Ts'o * near to their parent directory's inode. 1020d444c3c3STheodore Ts'o */ 1021d444c3c3STheodore Ts'o ext4_group_t i_block_group; 10228a2005d3STheodore Ts'o ext4_lblk_t i_dir_start_lookup; 1023353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 102419f5fb7aSTheodore Ts'o unsigned long i_state_flags; /* Dynamic state flags */ 1025353eb83cSTheodore Ts'o #endif 102612e9b892SDmitry Monakhov unsigned long i_flags; 1027d444c3c3STheodore Ts'o 1028d444c3c3STheodore Ts'o /* 1029d444c3c3STheodore Ts'o * Extended attributes can be read independently of the main file 1030d444c3c3STheodore Ts'o * data. Taking i_mutex even when reading would cause contention 1031d444c3c3STheodore Ts'o * between readers of EAs and writers of regular file data, so 1032d444c3c3STheodore Ts'o * instead we synchronize on xattr_sem when reading or changing 1033d444c3c3STheodore Ts'o * EAs. 1034d444c3c3STheodore Ts'o */ 1035d444c3c3STheodore Ts'o struct rw_semaphore xattr_sem; 1036d444c3c3STheodore Ts'o 1037d444c3c3STheodore Ts'o struct list_head i_orphan; /* unlinked but open inodes */ 1038d444c3c3STheodore Ts'o 1039aa75f4d3SHarshad Shirwadkar /* Fast commit related info */ 1040aa75f4d3SHarshad Shirwadkar 1041aa75f4d3SHarshad Shirwadkar struct list_head i_fc_list; /* 1042aa75f4d3SHarshad Shirwadkar * inodes that need fast commit 1043aa75f4d3SHarshad Shirwadkar * protected by sbi->s_fc_lock. 1044aa75f4d3SHarshad Shirwadkar */ 1045aa75f4d3SHarshad Shirwadkar 1046aa75f4d3SHarshad Shirwadkar /* Start of lblk range that needs to be committed in this fast commit */ 1047aa75f4d3SHarshad Shirwadkar ext4_lblk_t i_fc_lblk_start; 1048aa75f4d3SHarshad Shirwadkar 1049aa75f4d3SHarshad Shirwadkar /* End of lblk range that needs to be committed in this fast commit */ 1050aa75f4d3SHarshad Shirwadkar ext4_lblk_t i_fc_lblk_len; 1051aa75f4d3SHarshad Shirwadkar 1052aa75f4d3SHarshad Shirwadkar /* Number of ongoing updates on this inode */ 1053aa75f4d3SHarshad Shirwadkar atomic_t i_fc_updates; 1054aa75f4d3SHarshad Shirwadkar 1055aa75f4d3SHarshad Shirwadkar /* Fast commit wait queue for this inode */ 1056aa75f4d3SHarshad Shirwadkar wait_queue_head_t i_fc_wait; 1057aa75f4d3SHarshad Shirwadkar 1058aa75f4d3SHarshad Shirwadkar /* Protect concurrent accesses on i_fc_lblk_start, i_fc_lblk_len */ 1059aa75f4d3SHarshad Shirwadkar struct mutex i_fc_lock; 1060aa75f4d3SHarshad Shirwadkar 1061d444c3c3STheodore Ts'o /* 1062d444c3c3STheodore Ts'o * i_disksize keeps track of what the inode size is ON DISK, not 1063d444c3c3STheodore Ts'o * in memory. During truncate, i_size is set to the new size by 1064d444c3c3STheodore Ts'o * the VFS prior to calling ext4_truncate(), but the filesystem won't 1065d444c3c3STheodore Ts'o * set i_disksize to 0 until the truncate is actually under way. 1066d444c3c3STheodore Ts'o * 1067d444c3c3STheodore Ts'o * The intent is that i_disksize always represents the blocks which 1068d444c3c3STheodore Ts'o * are used by this file. This allows recovery to restart truncate 1069d444c3c3STheodore Ts'o * on orphans if we crash during truncate. We actually write i_disksize 1070d444c3c3STheodore Ts'o * into the on-disk inode when writing inodes out, instead of i_size. 1071d444c3c3STheodore Ts'o * 1072d444c3c3STheodore Ts'o * The only time when i_disksize and i_size may be different is when 1073d444c3c3STheodore Ts'o * a truncate is in progress. The only things which change i_disksize 1074d444c3c3STheodore Ts'o * are ext4_get_block (growth) and ext4_truncate (shrinkth). 1075d444c3c3STheodore Ts'o */ 1076d444c3c3STheodore Ts'o loff_t i_disksize; 1077d444c3c3STheodore Ts'o 1078d444c3c3STheodore Ts'o /* 1079d444c3c3STheodore Ts'o * i_data_sem is for serialising ext4_truncate() against 1080d444c3c3STheodore Ts'o * ext4_getblock(). In the 2.4 ext2 design, great chunks of inode's 1081d444c3c3STheodore Ts'o * data tree are chopped off during truncate. We can't do that in 1082d444c3c3STheodore Ts'o * ext4 because whenever we perform intermediate commits during 1083d444c3c3STheodore Ts'o * truncate, the inode and all the metadata blocks *must* be in a 1084d444c3c3STheodore Ts'o * consistent state which allows truncation of the orphans to restart 1085d444c3c3STheodore Ts'o * during recovery. Hence we must fix the get_block-vs-truncate race 1086d444c3c3STheodore Ts'o * by other means, so we have i_data_sem. 1087d444c3c3STheodore Ts'o */ 1088d444c3c3STheodore Ts'o struct rw_semaphore i_data_sem; 1089ea3d7209SJan Kara /* 1090ea3d7209SJan Kara * i_mmap_sem is for serializing page faults with truncate / punch hole 1091ea3d7209SJan Kara * operations. We have to make sure that new page cannot be faulted in 1092ea3d7209SJan Kara * a section of the inode that is being punched. We cannot easily use 1093ea3d7209SJan Kara * i_data_sem for this since we need protection for the whole punch 1094ea3d7209SJan Kara * operation and i_data_sem ranks below transaction start so we have 1095ea3d7209SJan Kara * to occasionally drop it. 1096ea3d7209SJan Kara */ 1097ea3d7209SJan Kara struct rw_semaphore i_mmap_sem; 1098d444c3c3STheodore Ts'o struct inode vfs_inode; 10998aefcd55STheodore Ts'o struct jbd2_inode *jinode; 1100d444c3c3STheodore Ts'o 1101202ee5dfSTheodore Ts'o spinlock_t i_raw_lock; /* protects updates to the raw inode */ 1102202ee5dfSTheodore Ts'o 1103d444c3c3STheodore Ts'o /* 1104d444c3c3STheodore Ts'o * File creation time. Its function is same as that of 11057b62b293SArnd Bergmann * struct timespec64 i_{a,c,m}time in the generic inode. 1106d444c3c3STheodore Ts'o */ 11077b62b293SArnd Bergmann struct timespec64 i_crtime; 1108d444c3c3STheodore Ts'o 1109d444c3c3STheodore Ts'o /* mballoc */ 111027bc446eSbrookxu atomic_t i_prealloc_active; 1111d444c3c3STheodore Ts'o struct list_head i_prealloc_list; 1112d444c3c3STheodore Ts'o spinlock_t i_prealloc_lock; 1113d444c3c3STheodore Ts'o 1114c0677e6dSZheng Liu /* extents status tree */ 1115c0677e6dSZheng Liu struct ext4_es_tree i_es_tree; 1116c0677e6dSZheng Liu rwlock_t i_es_lock; 1117edaa53caSZheng Liu struct list_head i_es_list; 1118eb68d0e2SZheng Liu unsigned int i_es_all_nr; /* protected by i_es_lock */ 1119edaa53caSZheng Liu unsigned int i_es_shk_nr; /* protected by i_es_lock */ 1120dd475925SJan Kara ext4_lblk_t i_es_shrink_lblk; /* Offset where we start searching for 1121dd475925SJan Kara extents to shrink. Protected by 1122dd475925SJan Kara i_es_lock */ 1123c0677e6dSZheng Liu 1124d444c3c3STheodore Ts'o /* ialloc */ 1125d444c3c3STheodore Ts'o ext4_group_t i_last_alloc_group; 1126d444c3c3STheodore Ts'o 1127d444c3c3STheodore Ts'o /* allocation reservation info for delalloc */ 1128a627b0a7SEric Whitney /* In case of bigalloc, this refer to clusters rather than blocks */ 1129d444c3c3STheodore Ts'o unsigned int i_reserved_data_blocks; 1130d444c3c3STheodore Ts'o 11311dc0aa46SEric Whitney /* pending cluster reservations for bigalloc file systems */ 11321dc0aa46SEric Whitney struct ext4_pending_tree i_pending_tree; 11331dc0aa46SEric Whitney 1134d444c3c3STheodore Ts'o /* on-disk additional length */ 1135d444c3c3STheodore Ts'o __u16 i_extra_isize; 1136d444c3c3STheodore Ts'o 113767cf5b09STao Ma /* Indicate the inline data space. */ 113867cf5b09STao Ma u16 i_inline_off; 113967cf5b09STao Ma u16 i_inline_size; 114067cf5b09STao Ma 1141a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1142a9e7f447SDmitry Monakhov /* quota space reservation, managed internally by quota code */ 1143a9e7f447SDmitry Monakhov qsize_t i_reserved_quota; 1144a9e7f447SDmitry Monakhov #endif 11458d5d02e6SMingming Cao 11462e8fa54eSJan Kara /* Lock protecting lists below */ 1147744692dcSJiaying Zhang spinlock_t i_completed_io_lock; 11482e8fa54eSJan Kara /* 11492e8fa54eSJan Kara * Completed IOs that need unwritten extents handling and have 11502e8fa54eSJan Kara * transaction reserved 11512e8fa54eSJan Kara */ 11522e8fa54eSJan Kara struct list_head i_rsv_conversion_list; 11532e8fa54eSJan Kara struct work_struct i_rsv_conversion_work; 1154600be30aSJan Kara atomic_t i_unwritten; /* Nr. of inflight conversions pending */ 11558a2005d3STheodore Ts'o 11568a2005d3STheodore Ts'o spinlock_t i_block_reservation_lock; 1157b436b9beSJan Kara 1158b436b9beSJan Kara /* 1159b436b9beSJan Kara * Transactions that contain inode's metadata needed to complete 1160b436b9beSJan Kara * fsync and fdatasync, respectively. 1161b436b9beSJan Kara */ 1162b436b9beSJan Kara tid_t i_sync_tid; 1163b436b9beSJan Kara tid_t i_datasync_tid; 1164814525f4SDarrick J. Wong 116596c7e0d9SJan Kara #ifdef CONFIG_QUOTA 116696c7e0d9SJan Kara struct dquot *i_dquot[MAXQUOTAS]; 116796c7e0d9SJan Kara #endif 116896c7e0d9SJan Kara 1169814525f4SDarrick J. Wong /* Precomputed uuid+inum+igen checksum for seeding inode checksums */ 1170814525f4SDarrick J. Wong __u32 i_csum_seed; 1171b30ab0e0SMichael Halcrow 1172040cb378SLi Xi kprojid_t i_projid; 1173d444c3c3STheodore Ts'o }; 1174d444c3c3STheodore Ts'o 1175d444c3c3STheodore Ts'o /* 11763dcf5451SChristoph Hellwig * File system states 11773dcf5451SChristoph Hellwig */ 11783dcf5451SChristoph Hellwig #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ 11793dcf5451SChristoph Hellwig #define EXT4_ERROR_FS 0x0002 /* Errors detected */ 11803dcf5451SChristoph Hellwig #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ 11818016e29fSHarshad Shirwadkar #define EXT4_FC_REPLAY 0x0020 /* Fast commit replay ongoing */ 11823dcf5451SChristoph Hellwig 11833dcf5451SChristoph Hellwig /* 11843dcf5451SChristoph Hellwig * Misc. filesystem flags 11853dcf5451SChristoph Hellwig */ 11863dcf5451SChristoph Hellwig #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ 11873dcf5451SChristoph Hellwig #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ 11883dcf5451SChristoph Hellwig #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ 11893dcf5451SChristoph Hellwig 11903dcf5451SChristoph Hellwig /* 119168911009SLukas Czerner * Mount flags set via mount options or defaults 11923dcf5451SChristoph Hellwig */ 1193cdb7ee4cSTahsin Erdogan #define EXT4_MOUNT_NO_MBCACHE 0x00001 /* Do not use mbcache */ 11943dcf5451SChristoph Hellwig #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ 11953dcf5451SChristoph Hellwig #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ 11963dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ 11973dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ 11983dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ 119939ef17f1STheodore Ts'o #define EXT4_MOUNT_ERRORS_MASK 0x00070 12003dcf5451SChristoph Hellwig #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ 12013dcf5451SChristoph Hellwig #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ 1202923ae0ffSRoss Zwisler #ifdef CONFIG_FS_DAX 1203fc626fe3SIra Weiny #define EXT4_MOUNT_DAX_ALWAYS 0x00200 /* Direct Access */ 1204923ae0ffSRoss Zwisler #else 1205fc626fe3SIra Weiny #define EXT4_MOUNT_DAX_ALWAYS 0 1206923ae0ffSRoss Zwisler #endif 12073dcf5451SChristoph Hellwig #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ 12083dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ 12093dcf5451SChristoph Hellwig #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ 12103dcf5451SChristoph Hellwig #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ 12113dcf5451SChristoph Hellwig #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ 12123dcf5451SChristoph Hellwig #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ 12133dcf5451SChristoph Hellwig #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ 12143dcf5451SChristoph Hellwig #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ 1215afd4672dSTheodore Ts'o #define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000 /* No auto delalloc mapping */ 12163dcf5451SChristoph Hellwig #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ 121749da9392SJan Kara #define EXT4_MOUNT_QUOTA 0x40000 /* Some quota option set */ 121849da9392SJan Kara #define EXT4_MOUNT_USRQUOTA 0x80000 /* "old" user quota, 121949da9392SJan Kara * enable enforcement for hidden 122049da9392SJan Kara * quota files */ 122149da9392SJan Kara #define EXT4_MOUNT_GRPQUOTA 0x100000 /* "old" group quota, enable 122249da9392SJan Kara * enforcement for hidden quota 122349da9392SJan Kara * files */ 122449da9392SJan Kara #define EXT4_MOUNT_PRJQUOTA 0x200000 /* Enable project quota 122549da9392SJan Kara * enforcement */ 1226744692dcSJiaying Zhang #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */ 1227d4da6c9cSLinus Torvalds #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ 12283dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ 1229327eaf73STheodore Ts'o #define EXT4_MOUNT_WARN_ON_ERROR 0x2000000 /* Trigger WARN_ON on error */ 123021175ca4SHarshad Shirwadkar #define EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS 0x4000000 123164769240SAlex Tomas #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ 12325bf5683aSHidehiro Kawai #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ 12336fd058f7STheodore Ts'o #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ 12345328e635SEric Sandeen #define EXT4_MOUNT_DISCARD 0x40000000 /* Issue DISCARD requests */ 1235bfff6873SLukas Czerner #define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000 /* Initialize uninitialized itables */ 12365bf5683aSHidehiro Kawai 123768911009SLukas Czerner /* 123868911009SLukas Czerner * Mount flags set either automatically (could not be set by mount option) 123968911009SLukas Czerner * based on per file system feature or property or in special cases such as 124068911009SLukas Czerner * distinguishing between explicit mount option definition and default. 124168911009SLukas Czerner */ 124256889787STheodore Ts'o #define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001 /* User explicitly 124356889787STheodore Ts'o specified delalloc */ 124468911009SLukas Czerner #define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002 /* We have standard group 124568911009SLukas Czerner size of blocksize * 8 124668911009SLukas Czerner blocks */ 1247ed3654ebSTheodore Ts'o #define EXT4_MOUNT2_HURD_COMPAT 0x00000004 /* Support HURD-castrated 1248ed3654ebSTheodore Ts'o file systems */ 12491e381f60SDmitry Monakhov #define EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM 0x00000008 /* User explicitly 12501e381f60SDmitry Monakhov specified journal checksum */ 12511e381f60SDmitry Monakhov 1252995a3ed6SHarshad Shirwadkar #define EXT4_MOUNT2_JOURNAL_FAST_COMMIT 0x00000010 /* Journal fast commit */ 1253a72b38eeSHarshad Shirwadkar #define EXT4_MOUNT2_DAX_NEVER 0x00000020 /* Do not allow Direct Access */ 1254a72b38eeSHarshad Shirwadkar #define EXT4_MOUNT2_DAX_INODE 0x00000040 /* For printing options only */ 1255196e402aSHarshad Shirwadkar #define EXT4_MOUNT2_MB_OPTIMIZE_SCAN 0x00000080 /* Optimize group 1256196e402aSHarshad Shirwadkar * scanning in mballoc 1257196e402aSHarshad Shirwadkar */ 1258995a3ed6SHarshad Shirwadkar 1259fd8c37ecSTheodore Ts'o #define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \ 1260fd8c37ecSTheodore Ts'o ~EXT4_MOUNT_##opt 1261fd8c37ecSTheodore Ts'o #define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \ 1262fd8c37ecSTheodore Ts'o EXT4_MOUNT_##opt 12633dcf5451SChristoph Hellwig #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ 12643dcf5451SChristoph Hellwig EXT4_MOUNT_##opt) 12653dcf5451SChristoph Hellwig 1266a2595b8aSTheodore Ts'o #define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \ 1267a2595b8aSTheodore Ts'o ~EXT4_MOUNT2_##opt 1268a2595b8aSTheodore Ts'o #define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \ 1269a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt 1270a2595b8aSTheodore Ts'o #define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \ 1271a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt) 1272a2595b8aSTheodore Ts'o 1273597d508cSAkinobu Mita #define ext4_test_and_set_bit __test_and_set_bit_le 1274597d508cSAkinobu Mita #define ext4_set_bit __set_bit_le 12753dcf5451SChristoph Hellwig #define ext4_set_bit_atomic ext2_set_bit_atomic 1276597d508cSAkinobu Mita #define ext4_test_and_clear_bit __test_and_clear_bit_le 1277597d508cSAkinobu Mita #define ext4_clear_bit __clear_bit_le 12783dcf5451SChristoph Hellwig #define ext4_clear_bit_atomic ext2_clear_bit_atomic 127950e0168cSAkinobu Mita #define ext4_test_bit test_bit_le 128050e0168cSAkinobu Mita #define ext4_find_next_zero_bit find_next_zero_bit_le 128150e0168cSAkinobu Mita #define ext4_find_next_bit find_next_bit_le 12823dcf5451SChristoph Hellwig 1283c3e94d1dSYongqiang Yang extern void ext4_set_bits(void *bm, int cur, int len); 1284c3e94d1dSYongqiang Yang 12853dcf5451SChristoph Hellwig /* 12863dcf5451SChristoph Hellwig * Maximal mount counts between two filesystem checks 12873dcf5451SChristoph Hellwig */ 12883dcf5451SChristoph Hellwig #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ 12893dcf5451SChristoph Hellwig #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ 12903dcf5451SChristoph Hellwig 12913dcf5451SChristoph Hellwig /* 12923dcf5451SChristoph Hellwig * Behaviour when detecting errors 12933dcf5451SChristoph Hellwig */ 12943dcf5451SChristoph Hellwig #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ 12953dcf5451SChristoph Hellwig #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ 12963dcf5451SChristoph Hellwig #define EXT4_ERRORS_PANIC 3 /* Panic */ 12973dcf5451SChristoph Hellwig #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE 12983dcf5451SChristoph Hellwig 1299e6153918SDarrick J. Wong /* Metadata checksum algorithm codes */ 1300e6153918SDarrick J. Wong #define EXT4_CRC32C_CHKSUM 1 1301e6153918SDarrick J. Wong 13023dcf5451SChristoph Hellwig /* 13033dcf5451SChristoph Hellwig * Structure of the super block 13043dcf5451SChristoph Hellwig */ 13053dcf5451SChristoph Hellwig struct ext4_super_block { 13063dcf5451SChristoph Hellwig /*00*/ __le32 s_inodes_count; /* Inodes count */ 13073dcf5451SChristoph Hellwig __le32 s_blocks_count_lo; /* Blocks count */ 13083dcf5451SChristoph Hellwig __le32 s_r_blocks_count_lo; /* Reserved blocks count */ 13093dcf5451SChristoph Hellwig __le32 s_free_blocks_count_lo; /* Free blocks count */ 13103dcf5451SChristoph Hellwig /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ 13113dcf5451SChristoph Hellwig __le32 s_first_data_block; /* First Data Block */ 13123dcf5451SChristoph Hellwig __le32 s_log_block_size; /* Block size */ 1313281b5995STheodore Ts'o __le32 s_log_cluster_size; /* Allocation cluster size */ 13143dcf5451SChristoph Hellwig /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ 1315281b5995STheodore Ts'o __le32 s_clusters_per_group; /* # Clusters per group */ 13163dcf5451SChristoph Hellwig __le32 s_inodes_per_group; /* # Inodes per group */ 13173dcf5451SChristoph Hellwig __le32 s_mtime; /* Mount time */ 13183dcf5451SChristoph Hellwig /*30*/ __le32 s_wtime; /* Write time */ 13193dcf5451SChristoph Hellwig __le16 s_mnt_count; /* Mount count */ 13203dcf5451SChristoph Hellwig __le16 s_max_mnt_count; /* Maximal mount count */ 13213dcf5451SChristoph Hellwig __le16 s_magic; /* Magic signature */ 13223dcf5451SChristoph Hellwig __le16 s_state; /* File system state */ 13233dcf5451SChristoph Hellwig __le16 s_errors; /* Behaviour when detecting errors */ 13243dcf5451SChristoph Hellwig __le16 s_minor_rev_level; /* minor revision level */ 13253dcf5451SChristoph Hellwig /*40*/ __le32 s_lastcheck; /* time of last check */ 13263dcf5451SChristoph Hellwig __le32 s_checkinterval; /* max. time between checks */ 13273dcf5451SChristoph Hellwig __le32 s_creator_os; /* OS */ 13283dcf5451SChristoph Hellwig __le32 s_rev_level; /* Revision level */ 13293dcf5451SChristoph Hellwig /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ 13303dcf5451SChristoph Hellwig __le16 s_def_resgid; /* Default gid for reserved blocks */ 13313dcf5451SChristoph Hellwig /* 13323dcf5451SChristoph Hellwig * These fields are for EXT4_DYNAMIC_REV superblocks only. 13333dcf5451SChristoph Hellwig * 13343dcf5451SChristoph Hellwig * Note: the difference between the compatible feature set and 13353dcf5451SChristoph Hellwig * the incompatible feature set is that if there is a bit set 13363dcf5451SChristoph Hellwig * in the incompatible feature set that the kernel doesn't 13373dcf5451SChristoph Hellwig * know about, it should refuse to mount the filesystem. 13383dcf5451SChristoph Hellwig * 13393dcf5451SChristoph Hellwig * e2fsck's requirements are more strict; if it doesn't know 13403dcf5451SChristoph Hellwig * about a feature in either the compatible or incompatible 13413dcf5451SChristoph Hellwig * feature set, it must abort and not try to meddle with 13423dcf5451SChristoph Hellwig * things it doesn't understand... 13433dcf5451SChristoph Hellwig */ 13443dcf5451SChristoph Hellwig __le32 s_first_ino; /* First non-reserved inode */ 13453dcf5451SChristoph Hellwig __le16 s_inode_size; /* size of inode structure */ 13463dcf5451SChristoph Hellwig __le16 s_block_group_nr; /* block group # of this superblock */ 13473dcf5451SChristoph Hellwig __le32 s_feature_compat; /* compatible feature set */ 13483dcf5451SChristoph Hellwig /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ 13493dcf5451SChristoph Hellwig __le32 s_feature_ro_compat; /* readonly-compatible feature set */ 13503dcf5451SChristoph Hellwig /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ 13513dcf5451SChristoph Hellwig /*78*/ char s_volume_name[16]; /* volume name */ 1352072ebb3bSTheodore Ts'o /*88*/ char s_last_mounted[64] __nonstring; /* directory where last mounted */ 13533dcf5451SChristoph Hellwig /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ 13543dcf5451SChristoph Hellwig /* 13553dcf5451SChristoph Hellwig * Performance hints. Directory preallocation should only 13563dcf5451SChristoph Hellwig * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. 13573dcf5451SChristoph Hellwig */ 13583dcf5451SChristoph Hellwig __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 13593dcf5451SChristoph Hellwig __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 13603dcf5451SChristoph Hellwig __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ 13613dcf5451SChristoph Hellwig /* 13623dcf5451SChristoph Hellwig * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. 13633dcf5451SChristoph Hellwig */ 13643dcf5451SChristoph Hellwig /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 13653dcf5451SChristoph Hellwig /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ 13663dcf5451SChristoph Hellwig __le32 s_journal_dev; /* device number of journal file */ 13673dcf5451SChristoph Hellwig __le32 s_last_orphan; /* start of list of inodes to delete */ 13683dcf5451SChristoph Hellwig __le32 s_hash_seed[4]; /* HTREE hash seed */ 13693dcf5451SChristoph Hellwig __u8 s_def_hash_version; /* Default hash version to use */ 137089eeddf0STheodore Ts'o __u8 s_jnl_backup_type; 13713dcf5451SChristoph Hellwig __le16 s_desc_size; /* size of group descriptor */ 13723dcf5451SChristoph Hellwig /*100*/ __le32 s_default_mount_opts; 13733dcf5451SChristoph Hellwig __le32 s_first_meta_bg; /* First metablock block group */ 13743dcf5451SChristoph Hellwig __le32 s_mkfs_time; /* When the filesystem was created */ 13753dcf5451SChristoph Hellwig __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ 13763dcf5451SChristoph Hellwig /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ 13773dcf5451SChristoph Hellwig /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ 13783dcf5451SChristoph Hellwig __le32 s_r_blocks_count_hi; /* Reserved blocks count */ 13793dcf5451SChristoph Hellwig __le32 s_free_blocks_count_hi; /* Free blocks count */ 13803dcf5451SChristoph Hellwig __le16 s_min_extra_isize; /* All inodes have at least # bytes */ 13813dcf5451SChristoph Hellwig __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ 13823dcf5451SChristoph Hellwig __le32 s_flags; /* Miscellaneous flags */ 13833dcf5451SChristoph Hellwig __le16 s_raid_stride; /* RAID stride */ 1384c5e06d10SJohann Lombardi __le16 s_mmp_update_interval; /* # seconds to wait in MMP checking */ 13853dcf5451SChristoph Hellwig __le64 s_mmp_block; /* Block for multi-mount protection */ 13863dcf5451SChristoph Hellwig __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ 1387772cb7c8SJose R. Santos __u8 s_log_groups_per_flex; /* FLEX_BG group size */ 1388e6153918SDarrick J. Wong __u8 s_checksum_type; /* metadata checksum algorithm used */ 1389f542fbe8STheodore Ts'o __u8 s_encryption_level; /* versioning level for encryption */ 1390f542fbe8STheodore Ts'o __u8 s_reserved_pad; /* Padding to next 32bits */ 1391afc32f7eSTheodore Ts'o __le64 s_kbytes_written; /* nr of lifetime kilobytes written */ 13924a9cdec7STheodore Ts'o __le32 s_snapshot_inum; /* Inode number of active snapshot */ 13934a9cdec7STheodore Ts'o __le32 s_snapshot_id; /* sequential ID of active snapshot */ 13944a9cdec7STheodore Ts'o __le64 s_snapshot_r_blocks_count; /* reserved blocks for active 13954a9cdec7STheodore Ts'o snapshot's future use */ 13964a9cdec7STheodore Ts'o __le32 s_snapshot_list; /* inode number of the head of the 13974a9cdec7STheodore Ts'o on-disk snapshot list */ 13981c13d5c0STheodore Ts'o #define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count) 13991c13d5c0STheodore Ts'o __le32 s_error_count; /* number of fs errors */ 14001c13d5c0STheodore Ts'o __le32 s_first_error_time; /* first time an error happened */ 14011c13d5c0STheodore Ts'o __le32 s_first_error_ino; /* inode involved in first error */ 14021c13d5c0STheodore Ts'o __le64 s_first_error_block; /* block involved of first error */ 1403072ebb3bSTheodore Ts'o __u8 s_first_error_func[32] __nonstring; /* function where the error happened */ 14041c13d5c0STheodore Ts'o __le32 s_first_error_line; /* line number where error happened */ 14051c13d5c0STheodore Ts'o __le32 s_last_error_time; /* most recent time of an error */ 14061c13d5c0STheodore Ts'o __le32 s_last_error_ino; /* inode involved in last error */ 14071c13d5c0STheodore Ts'o __le32 s_last_error_line; /* line number where error happened */ 14081c13d5c0STheodore Ts'o __le64 s_last_error_block; /* block involved of last error */ 1409072ebb3bSTheodore Ts'o __u8 s_last_error_func[32] __nonstring; /* function where the error happened */ 14108b67f04aSTheodore Ts'o #define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts) 14118b67f04aSTheodore Ts'o __u8 s_mount_opts[64]; 1412281b5995STheodore Ts'o __le32 s_usr_quota_inum; /* inode for tracking user quota */ 1413281b5995STheodore Ts'o __le32 s_grp_quota_inum; /* inode for tracking group quota */ 1414281b5995STheodore Ts'o __le32 s_overhead_clusters; /* overhead blocks/clusters in fs */ 14151beeef1bSDarrick J. Wong __le32 s_backup_bgs[2]; /* groups with sparse_super2 SBs */ 14163edc18d8STheodore Ts'o __u8 s_encrypt_algos[4]; /* Encryption algorithms in use */ 1417f542fbe8STheodore Ts'o __u8 s_encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ 1418f542fbe8STheodore Ts'o __le32 s_lpf_ino; /* Location of the lost+found inode */ 14198b4953e1STheodore Ts'o __le32 s_prj_quota_inum; /* inode for tracking project quota */ 14208c81bd8fSDarrick J. Wong __le32 s_checksum_seed; /* crc32c(uuid) if csum_seed set */ 14216a0678a7SArnd Bergmann __u8 s_wtime_hi; 14226a0678a7SArnd Bergmann __u8 s_mtime_hi; 14236a0678a7SArnd Bergmann __u8 s_mkfs_time_hi; 14246a0678a7SArnd Bergmann __u8 s_lastcheck_hi; 14256a0678a7SArnd Bergmann __u8 s_first_error_time_hi; 14266a0678a7SArnd Bergmann __u8 s_last_error_time_hi; 1427878520acSTheodore Ts'o __u8 s_first_error_errcode; 1428878520acSTheodore Ts'o __u8 s_last_error_errcode; 1429c83ad55eSGabriel Krisman Bertazi __le16 s_encoding; /* Filename charset encoding */ 1430c83ad55eSGabriel Krisman Bertazi __le16 s_encoding_flags; /* Filename charset encoding flags */ 1431c83ad55eSGabriel Krisman Bertazi __le32 s_reserved[95]; /* Padding to the end of the block */ 1432e6153918SDarrick J. Wong __le32 s_checksum; /* crc32c(superblock) */ 14333dcf5451SChristoph Hellwig }; 14343dcf5451SChristoph Hellwig 14351c13d5c0STheodore Ts'o #define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START) 14361c13d5c0STheodore Ts'o 14373dcf5451SChristoph Hellwig #ifdef __KERNEL__ 1438bc0b0d6dSTheodore Ts'o 1439643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1440ac4acb1fSEric Biggers #define DUMMY_ENCRYPTION_ENABLED(sbi) ((sbi)->s_dummy_enc_policy.policy != NULL) 14416ddb2447STheodore Ts'o #else 14426ddb2447STheodore Ts'o #define DUMMY_ENCRYPTION_ENABLED(sbi) (0) 14436ddb2447STheodore Ts'o #endif 1444bc0b0d6dSTheodore Ts'o 1445a2d4a646SJan Kara /* Number of quota types we support */ 1446689c958cSLi Xi #define EXT4_MAXQUOTAS 3 1447a2d4a646SJan Kara 1448c83ad55eSGabriel Krisman Bertazi #define EXT4_ENC_UTF8_12_1 1 1449c83ad55eSGabriel Krisman Bertazi 1450c83ad55eSGabriel Krisman Bertazi /* 1451ca0faba0STheodore Ts'o * fourth extended-fs super-block data in memory 1452ca0faba0STheodore Ts'o */ 1453ca0faba0STheodore Ts'o struct ext4_sb_info { 1454ca0faba0STheodore Ts'o unsigned long s_desc_size; /* Size of a group descriptor in bytes */ 1455ca0faba0STheodore Ts'o unsigned long s_inodes_per_block;/* Number of inodes per block */ 1456ca0faba0STheodore Ts'o unsigned long s_blocks_per_group;/* Number of blocks in a group */ 1457281b5995STheodore Ts'o unsigned long s_clusters_per_group; /* Number of clusters in a group */ 1458ca0faba0STheodore Ts'o unsigned long s_inodes_per_group;/* Number of inodes in a group */ 1459ca0faba0STheodore Ts'o unsigned long s_itb_per_group; /* Number of inode table blocks per group */ 1460ca0faba0STheodore Ts'o unsigned long s_gdb_count; /* Number of group descriptor blocks */ 1461ca0faba0STheodore Ts'o unsigned long s_desc_per_block; /* Number of group descriptors per block */ 1462ca0faba0STheodore Ts'o ext4_group_t s_groups_count; /* Number of groups in the fs */ 1463fb0a387dSEric Sandeen ext4_group_t s_blockfile_groups;/* Groups acceptable for non-extent files */ 1464952fc18eSTheodore Ts'o unsigned long s_overhead; /* # of fs overhead clusters */ 1465281b5995STheodore Ts'o unsigned int s_cluster_ratio; /* Number of blocks per cluster */ 1466281b5995STheodore Ts'o unsigned int s_cluster_bits; /* log2 of s_cluster_ratio */ 1467ca0faba0STheodore Ts'o loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ 1468ca0faba0STheodore Ts'o struct buffer_head * s_sbh; /* Buffer containing the super block */ 1469ca0faba0STheodore Ts'o struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ 14701d0c3924STheodore Ts'o struct buffer_head * __rcu *s_group_desc; 14717f4520ccSTheodore Ts'o unsigned int s_mount_opt; 1472a2595b8aSTheodore Ts'o unsigned int s_mount_opt2; 14739b5f6c9bSHarshad Shirwadkar unsigned long s_mount_flags; 14745a916be1STheodore Ts'o unsigned int s_def_mount_opt; 1475ca0faba0STheodore Ts'o ext4_fsblk_t s_sb_block; 147627dd4385SLukas Czerner atomic64_t s_resv_clusters; 147708cefc7aSEric W. Biederman kuid_t s_resuid; 147808cefc7aSEric W. Biederman kgid_t s_resgid; 1479ca0faba0STheodore Ts'o unsigned short s_mount_state; 1480ca0faba0STheodore Ts'o unsigned short s_pad; 1481ca0faba0STheodore Ts'o int s_addr_per_block_bits; 1482ca0faba0STheodore Ts'o int s_desc_per_block_bits; 1483ca0faba0STheodore Ts'o int s_inode_size; 1484ca0faba0STheodore Ts'o int s_first_ino; 1485ca0faba0STheodore Ts'o unsigned int s_inode_readahead_blks; 148611013911SAndreas Dilger unsigned int s_inode_goal; 1487ca0faba0STheodore Ts'o u32 s_hash_seed[4]; 1488ca0faba0STheodore Ts'o int s_def_hash_version; 14896d2424a8SEric Biggers int s_hash_unsigned; /* 3 if hash should be unsigned, 0 if not */ 149057042651STheodore Ts'o struct percpu_counter s_freeclusters_counter; 1491ca0faba0STheodore Ts'o struct percpu_counter s_freeinodes_counter; 1492ca0faba0STheodore Ts'o struct percpu_counter s_dirs_counter; 149357042651STheodore Ts'o struct percpu_counter s_dirtyclusters_counter; 1494efc61345SEric Whitney struct percpu_counter s_sra_exceeded_retry_limit; 1495ca0faba0STheodore Ts'o struct blockgroup_lock *s_blockgroup_lock; 1496ca0faba0STheodore Ts'o struct proc_dir_entry *s_proc; 1497ca0faba0STheodore Ts'o struct kobject s_kobj; 1498ca0faba0STheodore Ts'o struct completion s_kobj_unregister; 14992c0544b2STheodore Ts'o struct super_block *s_sb; 1500618f0031SPavel Skripkin struct buffer_head *s_mmp_bh; 1501ca0faba0STheodore Ts'o 1502ca0faba0STheodore Ts'o /* Journaling */ 1503ca0faba0STheodore Ts'o struct journal_s *s_journal; 1504ca0faba0STheodore Ts'o struct list_head s_orphan; 1505ca0faba0STheodore Ts'o struct mutex s_orphan_lock; 15069549a168STheodore Ts'o unsigned long s_ext4_flags; /* Ext4 superblock flags */ 1507ca0faba0STheodore Ts'o unsigned long s_commit_interval; 1508ca0faba0STheodore Ts'o u32 s_max_batch_time; 1509ca0faba0STheodore Ts'o u32 s_min_batch_time; 1510ee7ed3aaSChunguang Xu struct block_device *s_journal_bdev; 1511ca0faba0STheodore Ts'o #ifdef CONFIG_QUOTA 151233458eabSTheodore Ts'o /* Names of quota files with journalled quota */ 151333458eabSTheodore Ts'o char __rcu *s_qf_names[EXT4_MAXQUOTAS]; 1514ca0faba0STheodore Ts'o int s_jquota_fmt; /* Format of quota to use */ 1515ca0faba0STheodore Ts'o #endif 1516ca0faba0STheodore Ts'o unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ 1517dd0db94fSChunguang Xu struct ext4_system_blocks __rcu *s_system_blks; 1518ca0faba0STheodore Ts'o 1519ca0faba0STheodore Ts'o #ifdef EXTENTS_STATS 1520ca0faba0STheodore Ts'o /* ext4 extents stats */ 1521ca0faba0STheodore Ts'o unsigned long s_ext_min; 1522ca0faba0STheodore Ts'o unsigned long s_ext_max; 1523ca0faba0STheodore Ts'o unsigned long s_depth_max; 1524ca0faba0STheodore Ts'o spinlock_t s_ext_stats_lock; 1525ca0faba0STheodore Ts'o unsigned long s_ext_blocks; 1526ca0faba0STheodore Ts'o unsigned long s_ext_extents; 1527ca0faba0STheodore Ts'o #endif 1528ca0faba0STheodore Ts'o 1529ca0faba0STheodore Ts'o /* for buddy allocator */ 1530df3da4eaSSuraj Jitindar Singh struct ext4_group_info ** __rcu *s_group_info; 1531ca0faba0STheodore Ts'o struct inode *s_buddy_cache; 1532ca0faba0STheodore Ts'o spinlock_t s_md_lock; 1533ca0faba0STheodore Ts'o unsigned short *s_mb_offsets; 1534ca0faba0STheodore Ts'o unsigned int *s_mb_maxs; 153528623c2fSTheodore Ts'o unsigned int s_group_info_size; 1536d08854f5STheodore Ts'o unsigned int s_mb_free_pending; 1537a0154344SDaeho Jeong struct list_head s_freed_data_list; /* List of blocks to be freed 1538a0154344SDaeho Jeong after commit completed */ 1539196e402aSHarshad Shirwadkar struct rb_root s_mb_avg_fragment_size_root; 1540196e402aSHarshad Shirwadkar rwlock_t s_mb_rb_lock; 1541196e402aSHarshad Shirwadkar struct list_head *s_mb_largest_free_orders; 1542196e402aSHarshad Shirwadkar rwlock_t *s_mb_largest_free_orders_locks; 1543ca0faba0STheodore Ts'o 1544ca0faba0STheodore Ts'o /* tunables */ 1545ca0faba0STheodore Ts'o unsigned long s_stripe; 1546196e402aSHarshad Shirwadkar unsigned int s_mb_max_linear_groups; 1547ca0faba0STheodore Ts'o unsigned int s_mb_stream_request; 1548ca0faba0STheodore Ts'o unsigned int s_mb_max_to_scan; 1549ca0faba0STheodore Ts'o unsigned int s_mb_min_to_scan; 1550ca0faba0STheodore Ts'o unsigned int s_mb_stats; 1551ca0faba0STheodore Ts'o unsigned int s_mb_order2_reqs; 1552ca0faba0STheodore Ts'o unsigned int s_mb_group_prealloc; 155327bc446eSbrookxu unsigned int s_mb_max_inode_prealloc; 1554df981d03STheodore Ts'o unsigned int s_max_dir_size_kb; 1555ca0faba0STheodore Ts'o /* where last allocation was done - for stream allocation */ 1556ca0faba0STheodore Ts'o unsigned long s_mb_last_group; 1557ca0faba0STheodore Ts'o unsigned long s_mb_last_start; 1558cfd73237SAlex Zhuravlev unsigned int s_mb_prefetch; 1559cfd73237SAlex Zhuravlev unsigned int s_mb_prefetch_limit; 1560ca0faba0STheodore Ts'o 1561ca0faba0STheodore Ts'o /* stats for buddy allocator */ 1562ca0faba0STheodore Ts'o atomic_t s_bal_reqs; /* number of reqs with len > 1 */ 1563ca0faba0STheodore Ts'o atomic_t s_bal_success; /* we found long enough chunks */ 1564ca0faba0STheodore Ts'o atomic_t s_bal_allocated; /* in blocks */ 1565ca0faba0STheodore Ts'o atomic_t s_bal_ex_scanned; /* total extents scanned */ 1566a6c75eafSHarshad Shirwadkar atomic_t s_bal_groups_scanned; /* number of groups scanned */ 1567ca0faba0STheodore Ts'o atomic_t s_bal_goals; /* goal hits */ 1568ca0faba0STheodore Ts'o atomic_t s_bal_breaks; /* too long searches */ 1569ca0faba0STheodore Ts'o atomic_t s_bal_2orders; /* 2^order hits */ 1570196e402aSHarshad Shirwadkar atomic_t s_bal_cr0_bad_suggestions; 1571196e402aSHarshad Shirwadkar atomic_t s_bal_cr1_bad_suggestions; 1572a6c75eafSHarshad Shirwadkar atomic64_t s_bal_cX_groups_considered[4]; 1573a6c75eafSHarshad Shirwadkar atomic64_t s_bal_cX_hits[4]; 1574a6c75eafSHarshad Shirwadkar atomic64_t s_bal_cX_failed[4]; /* cX loop didn't find blocks */ 157567d25186SHarshad Shirwadkar atomic_t s_mb_buddies_generated; /* number of buddies generated */ 157667d25186SHarshad Shirwadkar atomic64_t s_mb_generation_time; 1577ca0faba0STheodore Ts'o atomic_t s_mb_lost_chunks; 1578ca0faba0STheodore Ts'o atomic_t s_mb_preallocated; 1579ca0faba0STheodore Ts'o atomic_t s_mb_discarded; 158050797481STheodore Ts'o atomic_t s_lock_busy; 1581ca0faba0STheodore Ts'o 1582ca0faba0STheodore Ts'o /* locality groups */ 1583003cb608STejun Heo struct ext4_locality_group __percpu *s_locality_groups; 1584ca0faba0STheodore Ts'o 1585ca0faba0STheodore Ts'o /* for write statistics */ 1586ca0faba0STheodore Ts'o unsigned long s_sectors_written_start; 1587ca0faba0STheodore Ts'o u64 s_kbytes_written; 1588ca0faba0STheodore Ts'o 158967a5da56SZheng Liu /* the size of zero-out chunk */ 159067a5da56SZheng Liu unsigned int s_extent_max_zeroout_kb; 159167a5da56SZheng Liu 1592ca0faba0STheodore Ts'o unsigned int s_log_groups_per_flex; 15937c990728SSuraj Jitindar Singh struct flex_groups * __rcu *s_flex_groups; 1594117fff10STheodore Ts'o ext4_group_t s_flex_groups_allocated; 15954c0425ffSMingming Cao 15962e8fa54eSJan Kara /* workqueue for reserved extent conversions (buffered io) */ 15972e8fa54eSJan Kara struct workqueue_struct *rsv_conversion_wq; 159866e61a9eSTheodore Ts'o 159966e61a9eSTheodore Ts'o /* timer for periodic error stats printing */ 160066e61a9eSTheodore Ts'o struct timer_list s_err_report; 1601bfff6873SLukas Czerner 1602bfff6873SLukas Czerner /* Lazy inode table initialization info */ 1603bfff6873SLukas Czerner struct ext4_li_request *s_li_request; 1604bfff6873SLukas Czerner /* Wait multiplier for lazy initialization thread */ 1605bfff6873SLukas Czerner unsigned int s_li_wait_mult; 1606c5e06d10SJohann Lombardi 1607c5e06d10SJohann Lombardi /* Kernel thread for multiple mount protection */ 1608c5e06d10SJohann Lombardi struct task_struct *s_mmp_tsk; 16093d56b8d2STao Ma 16103d56b8d2STao Ma /* record the last minlen when FITRIM is called. */ 16113d56b8d2STao Ma atomic_t s_last_trim_minblks; 16120441984aSDarrick J. Wong 16130441984aSDarrick J. Wong /* Reference to checksum algorithm driver via cryptoapi */ 16140441984aSDarrick J. Wong struct crypto_shash *s_chksum_driver; 1615a9c47317SDarrick J. Wong 1616a9c47317SDarrick J. Wong /* Precomputed FS UUID checksum for seeding other checksums */ 1617a9c47317SDarrick J. Wong __u32 s_csum_seed; 161874cd15cdSZheng Liu 161974cd15cdSZheng Liu /* Reclaim extents from extent status tree */ 162074cd15cdSZheng Liu struct shrinker s_es_shrinker; 1621dd475925SJan Kara struct list_head s_es_list; /* List of inodes with reclaimable extents */ 1622edaa53caSZheng Liu long s_es_nr_inode; 1623eb68d0e2SZheng Liu struct ext4_es_stats s_es_stats; 162447387409STahsin Erdogan struct mb_cache *s_ea_block_cache; 1625dec214d0STahsin Erdogan struct mb_cache *s_ea_inode_cache; 1626edaa53caSZheng Liu spinlock_t s_es_lock ____cacheline_aligned_in_smp; 1627efbed4dcSTheodore Ts'o 1628efbed4dcSTheodore Ts'o /* Ratelimit ext4 messages. */ 1629efbed4dcSTheodore Ts'o struct ratelimit_state s_err_ratelimit_state; 1630efbed4dcSTheodore Ts'o struct ratelimit_state s_warning_ratelimit_state; 1631efbed4dcSTheodore Ts'o struct ratelimit_state s_msg_ratelimit_state; 16321cf006edSDmitry Monakhov atomic_t s_warning_count; 16331cf006edSDmitry Monakhov atomic_t s_msg_count; 1634c8585c6fSDaeho Jeong 1635ac4acb1fSEric Biggers /* Encryption policy for '-o test_dummy_encryption' */ 1636ac4acb1fSEric Biggers struct fscrypt_dummy_policy s_dummy_enc_policy; 1637ed318a6cSEric Biggers 1638cb85f4d2SEric Biggers /* 1639cb85f4d2SEric Biggers * Barrier between writepages ops and changing any inode's JOURNAL_DATA 1640cb85f4d2SEric Biggers * or EXTENTS flag. 1641cb85f4d2SEric Biggers */ 1642bbd55937SEric Biggers struct percpu_rw_semaphore s_writepages_rwsem; 16435e405595SDan Williams struct dax_device *s_daxdev; 164446f870d6STheodore Ts'o #ifdef CONFIG_EXT4_DEBUG 164546f870d6STheodore Ts'o unsigned long s_simulate_fail; 164646f870d6STheodore Ts'o #endif 1647bc71726cSzhangyi (F) /* Record the errseq of the backing block device */ 1648bc71726cSzhangyi (F) errseq_t s_bdev_wb_err; 1649bc71726cSzhangyi (F) spinlock_t s_bdev_wb_lock; 1650aa75f4d3SHarshad Shirwadkar 1651c92dc856SJan Kara /* Information about errors that happened during this mount */ 1652c92dc856SJan Kara spinlock_t s_error_lock; 1653c92dc856SJan Kara int s_add_error_count; 1654c92dc856SJan Kara int s_first_error_code; 1655c92dc856SJan Kara __u32 s_first_error_line; 1656c92dc856SJan Kara __u32 s_first_error_ino; 1657c92dc856SJan Kara __u64 s_first_error_block; 1658c92dc856SJan Kara const char *s_first_error_func; 1659c92dc856SJan Kara time64_t s_first_error_time; 1660c92dc856SJan Kara int s_last_error_code; 1661c92dc856SJan Kara __u32 s_last_error_line; 1662c92dc856SJan Kara __u32 s_last_error_ino; 1663c92dc856SJan Kara __u64 s_last_error_block; 1664c92dc856SJan Kara const char *s_last_error_func; 1665c92dc856SJan Kara time64_t s_last_error_time; 1666c92dc856SJan Kara /* 1667c92dc856SJan Kara * If we are in a context where we cannot update error information in 1668c92dc856SJan Kara * the on-disk superblock, we queue this work to do it. 1669c92dc856SJan Kara */ 1670c92dc856SJan Kara struct work_struct s_error_work; 1671c92dc856SJan Kara 1672aa75f4d3SHarshad Shirwadkar /* Ext4 fast commit stuff */ 1673aa75f4d3SHarshad Shirwadkar atomic_t s_fc_subtid; 1674aa75f4d3SHarshad Shirwadkar atomic_t s_fc_ineligible_updates; 1675aa75f4d3SHarshad Shirwadkar /* 1676aa75f4d3SHarshad Shirwadkar * After commit starts, the main queue gets locked, and the further 1677aa75f4d3SHarshad Shirwadkar * updates get added in the staging queue. 1678aa75f4d3SHarshad Shirwadkar */ 1679aa75f4d3SHarshad Shirwadkar #define FC_Q_MAIN 0 1680aa75f4d3SHarshad Shirwadkar #define FC_Q_STAGING 1 1681aa75f4d3SHarshad Shirwadkar struct list_head s_fc_q[2]; /* Inodes staged for fast commit 1682aa75f4d3SHarshad Shirwadkar * that have data changes in them. 1683aa75f4d3SHarshad Shirwadkar */ 1684aa75f4d3SHarshad Shirwadkar struct list_head s_fc_dentry_q[2]; /* directory entry updates */ 1685aa75f4d3SHarshad Shirwadkar unsigned int s_fc_bytes; 1686aa75f4d3SHarshad Shirwadkar /* 1687aa75f4d3SHarshad Shirwadkar * Main fast commit lock. This lock protects accesses to the 1688aa75f4d3SHarshad Shirwadkar * following fields: 1689aa75f4d3SHarshad Shirwadkar * ei->i_fc_list, s_fc_dentry_q, s_fc_q, s_fc_bytes, s_fc_bh. 1690aa75f4d3SHarshad Shirwadkar */ 1691aa75f4d3SHarshad Shirwadkar spinlock_t s_fc_lock; 1692aa75f4d3SHarshad Shirwadkar struct buffer_head *s_fc_bh; 1693aa75f4d3SHarshad Shirwadkar struct ext4_fc_stats s_fc_stats; 1694aa75f4d3SHarshad Shirwadkar u64 s_fc_avg_commit_time; 16958016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 16968016e29fSHarshad Shirwadkar int s_fc_debug_max_replay; 16978016e29fSHarshad Shirwadkar #endif 16988016e29fSHarshad Shirwadkar struct ext4_fc_replay_state s_fc_replay_state; 1699ca0faba0STheodore Ts'o }; 1700ca0faba0STheodore Ts'o 17013dcf5451SChristoph Hellwig static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) 17023dcf5451SChristoph Hellwig { 17033dcf5451SChristoph Hellwig return sb->s_fs_info; 17043dcf5451SChristoph Hellwig } 17053dcf5451SChristoph Hellwig static inline struct ext4_inode_info *EXT4_I(struct inode *inode) 17063dcf5451SChristoph Hellwig { 17073dcf5451SChristoph Hellwig return container_of(inode, struct ext4_inode_info, vfs_inode); 17083dcf5451SChristoph Hellwig } 17093dcf5451SChristoph Hellwig 17103dcf5451SChristoph Hellwig static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) 17113dcf5451SChristoph Hellwig { 17123dcf5451SChristoph Hellwig return ino == EXT4_ROOT_INO || 17133dcf5451SChristoph Hellwig (ino >= EXT4_FIRST_INO(sb) && 17143dcf5451SChristoph Hellwig ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); 17153dcf5451SChristoph Hellwig } 171619f5fb7aSTheodore Ts'o 171719f5fb7aSTheodore Ts'o /* 17181d0c3924STheodore Ts'o * Returns: sbi->field[index] 17191d0c3924STheodore Ts'o * Used to access an array element from the following sbi fields which require 17201d0c3924STheodore Ts'o * rcu protection to avoid dereferencing an invalid pointer due to reassignment 17211d0c3924STheodore Ts'o * - s_group_desc 17221d0c3924STheodore Ts'o * - s_group_info 17231d0c3924STheodore Ts'o * - s_flex_group 17241d0c3924STheodore Ts'o */ 17251d0c3924STheodore Ts'o #define sbi_array_rcu_deref(sbi, field, index) \ 17261d0c3924STheodore Ts'o ({ \ 17271d0c3924STheodore Ts'o typeof(*((sbi)->field)) _v; \ 17281d0c3924STheodore Ts'o rcu_read_lock(); \ 17291d0c3924STheodore Ts'o _v = ((typeof(_v)*)rcu_dereference((sbi)->field))[index]; \ 17301d0c3924STheodore Ts'o rcu_read_unlock(); \ 17311d0c3924STheodore Ts'o _v; \ 17321d0c3924STheodore Ts'o }) 17331d0c3924STheodore Ts'o 17341d0c3924STheodore Ts'o /* 17359b5f6c9bSHarshad Shirwadkar * run-time mount flags 17369b5f6c9bSHarshad Shirwadkar */ 17379b5f6c9bSHarshad Shirwadkar enum { 17389b5f6c9bSHarshad Shirwadkar EXT4_MF_MNTDIR_SAMPLED, 17399b5f6c9bSHarshad Shirwadkar EXT4_MF_FS_ABORTED, /* Fatal error detected */ 17409b5f6c9bSHarshad Shirwadkar EXT4_MF_FC_INELIGIBLE, /* Fast commit ineligible */ 17419b5f6c9bSHarshad Shirwadkar EXT4_MF_FC_COMMITTING /* File system underoing a fast 17429b5f6c9bSHarshad Shirwadkar * commit. 17439b5f6c9bSHarshad Shirwadkar */ 17449b5f6c9bSHarshad Shirwadkar }; 17459b5f6c9bSHarshad Shirwadkar 17469b5f6c9bSHarshad Shirwadkar static inline void ext4_set_mount_flag(struct super_block *sb, int bit) 17479b5f6c9bSHarshad Shirwadkar { 17489b5f6c9bSHarshad Shirwadkar set_bit(bit, &EXT4_SB(sb)->s_mount_flags); 17499b5f6c9bSHarshad Shirwadkar } 17509b5f6c9bSHarshad Shirwadkar 17519b5f6c9bSHarshad Shirwadkar static inline void ext4_clear_mount_flag(struct super_block *sb, int bit) 17529b5f6c9bSHarshad Shirwadkar { 17539b5f6c9bSHarshad Shirwadkar clear_bit(bit, &EXT4_SB(sb)->s_mount_flags); 17549b5f6c9bSHarshad Shirwadkar } 17559b5f6c9bSHarshad Shirwadkar 17569b5f6c9bSHarshad Shirwadkar static inline int ext4_test_mount_flag(struct super_block *sb, int bit) 17579b5f6c9bSHarshad Shirwadkar { 17589b5f6c9bSHarshad Shirwadkar return test_bit(bit, &EXT4_SB(sb)->s_mount_flags); 17599b5f6c9bSHarshad Shirwadkar } 17609b5f6c9bSHarshad Shirwadkar 17619b5f6c9bSHarshad Shirwadkar 17629b5f6c9bSHarshad Shirwadkar /* 176346f870d6STheodore Ts'o * Simulate_fail codes 176446f870d6STheodore Ts'o */ 176546f870d6STheodore Ts'o #define EXT4_SIM_BBITMAP_EIO 1 176646f870d6STheodore Ts'o #define EXT4_SIM_BBITMAP_CRC 2 176746f870d6STheodore Ts'o #define EXT4_SIM_IBITMAP_EIO 3 176846f870d6STheodore Ts'o #define EXT4_SIM_IBITMAP_CRC 4 176946f870d6STheodore Ts'o #define EXT4_SIM_INODE_EIO 5 177046f870d6STheodore Ts'o #define EXT4_SIM_INODE_CRC 6 177146f870d6STheodore Ts'o #define EXT4_SIM_DIRBLOCK_EIO 7 177246f870d6STheodore Ts'o #define EXT4_SIM_DIRBLOCK_CRC 8 177346f870d6STheodore Ts'o 177446f870d6STheodore Ts'o static inline bool ext4_simulate_fail(struct super_block *sb, 177546f870d6STheodore Ts'o unsigned long code) 177646f870d6STheodore Ts'o { 177746f870d6STheodore Ts'o #ifdef CONFIG_EXT4_DEBUG 177846f870d6STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 177946f870d6STheodore Ts'o 178046f870d6STheodore Ts'o if (unlikely(sbi->s_simulate_fail == code)) { 178146f870d6STheodore Ts'o sbi->s_simulate_fail = 0; 178246f870d6STheodore Ts'o return true; 178346f870d6STheodore Ts'o } 178446f870d6STheodore Ts'o #endif 178546f870d6STheodore Ts'o return false; 178646f870d6STheodore Ts'o } 178746f870d6STheodore Ts'o 178846f870d6STheodore Ts'o static inline void ext4_simulate_fail_bh(struct super_block *sb, 178946f870d6STheodore Ts'o struct buffer_head *bh, 179046f870d6STheodore Ts'o unsigned long code) 179146f870d6STheodore Ts'o { 179246f870d6STheodore Ts'o if (!IS_ERR(bh) && ext4_simulate_fail(sb, code)) 179346f870d6STheodore Ts'o clear_buffer_uptodate(bh); 179446f870d6STheodore Ts'o } 179546f870d6STheodore Ts'o 179646f870d6STheodore Ts'o /* 1797878520acSTheodore Ts'o * Error number codes for s_{first,last}_error_errno 1798878520acSTheodore Ts'o * 1799878520acSTheodore Ts'o * Linux errno numbers are architecture specific, so we need to translate 1800878520acSTheodore Ts'o * them into something which is architecture independent. We don't define 1801878520acSTheodore Ts'o * codes for all errno's; just the ones which are most likely to be the cause 1802878520acSTheodore Ts'o * of an ext4_error() call. 1803878520acSTheodore Ts'o */ 1804878520acSTheodore Ts'o #define EXT4_ERR_UNKNOWN 1 1805878520acSTheodore Ts'o #define EXT4_ERR_EIO 2 1806878520acSTheodore Ts'o #define EXT4_ERR_ENOMEM 3 1807878520acSTheodore Ts'o #define EXT4_ERR_EFSBADCRC 4 1808878520acSTheodore Ts'o #define EXT4_ERR_EFSCORRUPTED 5 1809878520acSTheodore Ts'o #define EXT4_ERR_ENOSPC 6 1810878520acSTheodore Ts'o #define EXT4_ERR_ENOKEY 7 1811878520acSTheodore Ts'o #define EXT4_ERR_EROFS 8 1812878520acSTheodore Ts'o #define EXT4_ERR_EFBIG 9 1813878520acSTheodore Ts'o #define EXT4_ERR_EEXIST 10 1814878520acSTheodore Ts'o #define EXT4_ERR_ERANGE 11 1815878520acSTheodore Ts'o #define EXT4_ERR_EOVERFLOW 12 1816878520acSTheodore Ts'o #define EXT4_ERR_EBUSY 13 1817878520acSTheodore Ts'o #define EXT4_ERR_ENOTDIR 14 1818878520acSTheodore Ts'o #define EXT4_ERR_ENOTEMPTY 15 1819878520acSTheodore Ts'o #define EXT4_ERR_ESHUTDOWN 16 1820878520acSTheodore Ts'o #define EXT4_ERR_EFAULT 17 1821878520acSTheodore Ts'o 1822878520acSTheodore Ts'o /* 182319f5fb7aSTheodore Ts'o * Inode dynamic state flags 182419f5fb7aSTheodore Ts'o */ 182519f5fb7aSTheodore Ts'o enum { 182619f5fb7aSTheodore Ts'o EXT4_STATE_JDATA, /* journaled data exists */ 182719f5fb7aSTheodore Ts'o EXT4_STATE_NEW, /* inode is newly created */ 182819f5fb7aSTheodore Ts'o EXT4_STATE_XATTR, /* has in-inode xattrs */ 182919f5fb7aSTheodore Ts'o EXT4_STATE_NO_EXPAND, /* No space for expansion */ 183019f5fb7aSTheodore Ts'o EXT4_STATE_DA_ALLOC_CLOSE, /* Alloc DA blks on close */ 183119f5fb7aSTheodore Ts'o EXT4_STATE_EXT_MIGRATE, /* Inode is migrating */ 183214ece102SFrank Mayhar EXT4_STATE_NEWENTRY, /* File just added to dir */ 183367cf5b09STao Ma EXT4_STATE_MAY_INLINE_DATA, /* may have in-inode data */ 18347869a4a6STheodore Ts'o EXT4_STATE_EXT_PRECACHED, /* extents have been precached */ 1835a6d05676STahsin Erdogan EXT4_STATE_LUSTRE_EA_INODE, /* Lustre-style ea_inode */ 1836c93d8f88SEric Biggers EXT4_STATE_VERITY_IN_PROGRESS, /* building fs-verity Merkle tree */ 1837aa75f4d3SHarshad Shirwadkar EXT4_STATE_FC_COMMITTING, /* Fast commit ongoing */ 183819f5fb7aSTheodore Ts'o }; 183919f5fb7aSTheodore Ts'o 1840353eb83cSTheodore Ts'o #define EXT4_INODE_BIT_FNS(name, field, offset) \ 184112e9b892SDmitry Monakhov static inline int ext4_test_inode_##name(struct inode *inode, int bit) \ 184212e9b892SDmitry Monakhov { \ 1843353eb83cSTheodore Ts'o return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 184412e9b892SDmitry Monakhov } \ 184512e9b892SDmitry Monakhov static inline void ext4_set_inode_##name(struct inode *inode, int bit) \ 184612e9b892SDmitry Monakhov { \ 1847353eb83cSTheodore Ts'o set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 184812e9b892SDmitry Monakhov } \ 184912e9b892SDmitry Monakhov static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \ 185012e9b892SDmitry Monakhov { \ 1851353eb83cSTheodore Ts'o clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 185219f5fb7aSTheodore Ts'o } 185319f5fb7aSTheodore Ts'o 18543f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 18553f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 18563f61c0ccSAndreas Dilger static inline int ext4_test_inode_flag(struct inode *inode, int bit); 18573f61c0ccSAndreas Dilger static inline void ext4_set_inode_flag(struct inode *inode, int bit); 18583f61c0ccSAndreas Dilger static inline void ext4_clear_inode_flag(struct inode *inode, int bit); 1859353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(flag, flags, 0) 18603f61c0ccSAndreas Dilger 18613f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 18623f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 18633f61c0ccSAndreas Dilger static inline int ext4_test_inode_state(struct inode *inode, int bit); 18643f61c0ccSAndreas Dilger static inline void ext4_set_inode_state(struct inode *inode, int bit); 18653f61c0ccSAndreas Dilger static inline void ext4_clear_inode_state(struct inode *inode, int bit); 1866353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 1867353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, state_flags, 0) 1868353eb83cSTheodore Ts'o 1869353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1870353eb83cSTheodore Ts'o { 1871353eb83cSTheodore Ts'o (ei)->i_state_flags = 0; 1872353eb83cSTheodore Ts'o } 1873353eb83cSTheodore Ts'o #else 1874353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, flags, 32) 1875353eb83cSTheodore Ts'o 1876353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1877353eb83cSTheodore Ts'o { 1878353eb83cSTheodore Ts'o /* We depend on the fact that callers will set i_flags */ 1879353eb83cSTheodore Ts'o } 1880353eb83cSTheodore Ts'o #endif 18813dcf5451SChristoph Hellwig #else 18823dcf5451SChristoph Hellwig /* Assume that user mode programs are passing in an ext4fs superblock, not 18833dcf5451SChristoph Hellwig * a kernel struct super_block. This will allow us to call the feature-test 18843dcf5451SChristoph Hellwig * macros from user land. */ 18853dcf5451SChristoph Hellwig #define EXT4_SB(sb) (sb) 18863dcf5451SChristoph Hellwig #endif 18873dcf5451SChristoph Hellwig 1888c93d8f88SEric Biggers static inline bool ext4_verity_in_progress(struct inode *inode) 1889c93d8f88SEric Biggers { 1890c93d8f88SEric Biggers return IS_ENABLED(CONFIG_FS_VERITY) && 1891c93d8f88SEric Biggers ext4_test_inode_state(inode, EXT4_STATE_VERITY_IN_PROGRESS); 1892c93d8f88SEric Biggers } 1893c93d8f88SEric Biggers 18943dcf5451SChristoph Hellwig #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime 18953dcf5451SChristoph Hellwig 18963dcf5451SChristoph Hellwig /* 18973dcf5451SChristoph Hellwig * Codes for operating systems 18983dcf5451SChristoph Hellwig */ 18993dcf5451SChristoph Hellwig #define EXT4_OS_LINUX 0 19003dcf5451SChristoph Hellwig #define EXT4_OS_HURD 1 19013dcf5451SChristoph Hellwig #define EXT4_OS_MASIX 2 19023dcf5451SChristoph Hellwig #define EXT4_OS_FREEBSD 3 19033dcf5451SChristoph Hellwig #define EXT4_OS_LITES 4 19043dcf5451SChristoph Hellwig 19053dcf5451SChristoph Hellwig /* 19063dcf5451SChristoph Hellwig * Revision levels 19073dcf5451SChristoph Hellwig */ 19083dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ 19093dcf5451SChristoph Hellwig #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ 19103dcf5451SChristoph Hellwig 19113dcf5451SChristoph Hellwig #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV 19123dcf5451SChristoph Hellwig 19133dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_INODE_SIZE 128 19143dcf5451SChristoph Hellwig 19154881c497SDeepa Dinamani #define EXT4_EXTRA_TIMESTAMP_MAX (((s64)1 << 34) - 1 + S32_MIN) 19164881c497SDeepa Dinamani #define EXT4_NON_EXTRA_TIMESTAMP_MAX S32_MAX 19174881c497SDeepa Dinamani #define EXT4_TIMESTAMP_MIN S32_MIN 19184881c497SDeepa Dinamani 19193dcf5451SChristoph Hellwig /* 19203dcf5451SChristoph Hellwig * Feature set definitions 19213dcf5451SChristoph Hellwig */ 19223dcf5451SChristoph Hellwig 19233dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 19243dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 19253dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 19263dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 19273dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 19283dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 19291beeef1bSDarrick J. Wong #define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200 1930a44ad683SHarshad Shirwadkar /* 1931a44ad683SHarshad Shirwadkar * The reason why "FAST_COMMIT" is a compat feature is that, FS becomes 1932a44ad683SHarshad Shirwadkar * incompatible only if fast commit blocks are present in the FS. Since we 1933a44ad683SHarshad Shirwadkar * clear the journal (and thus the fast commit blocks), we don't mark FS as 1934a44ad683SHarshad Shirwadkar * incompatible. We also have a JBD2 incompat feature, which gets set when 1935a44ad683SHarshad Shirwadkar * there are fast commit blocks present in the journal. 1936a44ad683SHarshad Shirwadkar */ 1937995a3ed6SHarshad Shirwadkar #define EXT4_FEATURE_COMPAT_FAST_COMMIT 0x0400 1938b925acb8SEric Biggers #define EXT4_FEATURE_COMPAT_STABLE_INODES 0x0800 19393dcf5451SChristoph Hellwig 19403dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 19413dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 19423dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 19433dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 19443dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 19453dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 19463dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 1947ae812306SAditya Kali #define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100 1948281b5995STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200 1949e6153918SDarrick J. Wong /* 1950e6153918SDarrick J. Wong * METADATA_CSUM also enables group descriptor checksums (GDT_CSUM). When 1951e6153918SDarrick J. Wong * METADATA_CSUM is set, group descriptor checksums use the same algorithm as 1952e6153918SDarrick J. Wong * all other data structures' checksums. However, the METADATA_CSUM and 1953e6153918SDarrick J. Wong * GDT_CSUM bits are mutually exclusive. 1954e6153918SDarrick J. Wong */ 19559b90e5e0STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400 19562cb5cc8bSDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000 19578b4953e1STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000 1958c93d8f88SEric Biggers #define EXT4_FEATURE_RO_COMPAT_VERITY 0x8000 19593dcf5451SChristoph Hellwig 19603dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 19613dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 19623dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ 19633dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ 19643dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 19653dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ 19663dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 19673dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 19683dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 1969f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */ 1970f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */ 19718c81bd8fSDarrick J. Wong #define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000 19729b90e5e0STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ 197367cf5b09STao Ma #define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ 19743edc18d8STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 1975c83ad55eSGabriel Krisman Bertazi #define EXT4_FEATURE_INCOMPAT_CASEFOLD 0x20000 19763dcf5451SChristoph Hellwig 1977c9e716ebSAndreas Dilger extern void ext4_update_dynamic_rev(struct super_block *sb); 1978c9e716ebSAndreas Dilger 1979e2b911c5SDarrick J. Wong #define EXT4_FEATURE_COMPAT_FUNCS(name, flagname) \ 1980e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 1981e2b911c5SDarrick J. Wong { \ 1982e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_compat & \ 1983e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname)) != 0); \ 1984e2b911c5SDarrick J. Wong } \ 1985e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 1986e2b911c5SDarrick J. Wong { \ 1987c9e716ebSAndreas Dilger ext4_update_dynamic_rev(sb); \ 1988e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_compat |= \ 1989e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ 1990e2b911c5SDarrick J. Wong } \ 1991e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 1992e2b911c5SDarrick J. Wong { \ 1993e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_compat &= \ 1994e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ 1995e2b911c5SDarrick J. Wong } 1996e2b911c5SDarrick J. Wong 1997e2b911c5SDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_FUNCS(name, flagname) \ 1998e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 1999e2b911c5SDarrick J. Wong { \ 2000e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ 2001e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname)) != 0); \ 2002e2b911c5SDarrick J. Wong } \ 2003e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 2004e2b911c5SDarrick J. Wong { \ 2005c9e716ebSAndreas Dilger ext4_update_dynamic_rev(sb); \ 2006e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_ro_compat |= \ 2007e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ 2008e2b911c5SDarrick J. Wong } \ 2009e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 2010e2b911c5SDarrick J. Wong { \ 2011e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_ro_compat &= \ 2012e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ 2013e2b911c5SDarrick J. Wong } 2014e2b911c5SDarrick J. Wong 2015e2b911c5SDarrick J. Wong #define EXT4_FEATURE_INCOMPAT_FUNCS(name, flagname) \ 2016e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 2017e2b911c5SDarrick J. Wong { \ 2018e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ 2019e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname)) != 0); \ 2020e2b911c5SDarrick J. Wong } \ 2021e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 2022e2b911c5SDarrick J. Wong { \ 2023c9e716ebSAndreas Dilger ext4_update_dynamic_rev(sb); \ 2024e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_incompat |= \ 2025e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ 2026e2b911c5SDarrick J. Wong } \ 2027e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 2028e2b911c5SDarrick J. Wong { \ 2029e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_incompat &= \ 2030e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ 2031e2b911c5SDarrick J. Wong } 2032e2b911c5SDarrick J. Wong 2033e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(dir_prealloc, DIR_PREALLOC) 2034e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(imagic_inodes, IMAGIC_INODES) 2035e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(journal, HAS_JOURNAL) 2036e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(xattr, EXT_ATTR) 2037e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(resize_inode, RESIZE_INODE) 2038e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(dir_index, DIR_INDEX) 2039e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(sparse_super2, SPARSE_SUPER2) 2040995a3ed6SHarshad Shirwadkar EXT4_FEATURE_COMPAT_FUNCS(fast_commit, FAST_COMMIT) 2041b925acb8SEric Biggers EXT4_FEATURE_COMPAT_FUNCS(stable_inodes, STABLE_INODES) 2042e2b911c5SDarrick J. Wong 2043e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(sparse_super, SPARSE_SUPER) 2044e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(large_file, LARGE_FILE) 2045e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(btree_dir, BTREE_DIR) 2046e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(huge_file, HUGE_FILE) 2047e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(gdt_csum, GDT_CSUM) 2048e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(dir_nlink, DIR_NLINK) 2049e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(extra_isize, EXTRA_ISIZE) 2050e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(quota, QUOTA) 2051e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(bigalloc, BIGALLOC) 2052e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(metadata_csum, METADATA_CSUM) 2053e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(readonly, READONLY) 2054e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(project, PROJECT) 2055c93d8f88SEric Biggers EXT4_FEATURE_RO_COMPAT_FUNCS(verity, VERITY) 2056e2b911c5SDarrick J. Wong 2057e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(compression, COMPRESSION) 2058e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(filetype, FILETYPE) 2059e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(journal_needs_recovery, RECOVER) 2060e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(journal_dev, JOURNAL_DEV) 2061e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(meta_bg, META_BG) 2062e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(extents, EXTENTS) 2063e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT) 2064e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(mmp, MMP) 2065e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(flex_bg, FLEX_BG) 2066e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(ea_inode, EA_INODE) 2067e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(dirdata, DIRDATA) 2068e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, CSUM_SEED) 2069e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(largedir, LARGEDIR) 2070e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, INLINE_DATA) 2071e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT) 2072c83ad55eSGabriel Krisman Bertazi EXT4_FEATURE_INCOMPAT_FUNCS(casefold, CASEFOLD) 2073e2b911c5SDarrick J. Wong 20742035e776STheodore Ts'o #define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 20752035e776STheodore Ts'o #define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 20762035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 20772035e776STheodore Ts'o #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 20782035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 20792035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 20802035e776STheodore Ts'o 20812035e776STheodore Ts'o #define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 20822035e776STheodore Ts'o #define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 20832035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_RECOVER| \ 20842035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 20852035e776STheodore Ts'o #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 20862035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 20872035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 20882035e776STheodore Ts'o 2089e2b911c5SDarrick J. Wong #define EXT4_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 20903dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 20913dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_RECOVER| \ 20923dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_META_BG| \ 20933dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_EXTENTS| \ 20943dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_64BIT| \ 2095c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_FLEX_BG| \ 2096e50e5129SAndreas Dilger EXT4_FEATURE_INCOMPAT_EA_INODE| \ 2097f08225d1STao Ma EXT4_FEATURE_INCOMPAT_MMP | \ 20986ddb2447STheodore Ts'o EXT4_FEATURE_INCOMPAT_INLINE_DATA | \ 20998c81bd8fSDarrick J. Wong EXT4_FEATURE_INCOMPAT_ENCRYPT | \ 2100c83ad55eSGabriel Krisman Bertazi EXT4_FEATURE_INCOMPAT_CASEFOLD | \ 2101e08ac99fSArtem Blagodarenko EXT4_FEATURE_INCOMPAT_CSUM_SEED | \ 2102e08ac99fSArtem Blagodarenko EXT4_FEATURE_INCOMPAT_LARGEDIR) 21033dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 21043dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 21053dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ 21063dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ 21073dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ 21083dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ 21096f16b606STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\ 2110e93376c2SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_BIGALLOC |\ 21117c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\ 2112040cb378SLi Xi EXT4_FEATURE_RO_COMPAT_QUOTA |\ 2113c93d8f88SEric Biggers EXT4_FEATURE_RO_COMPAT_PROJECT |\ 2114c93d8f88SEric Biggers EXT4_FEATURE_RO_COMPAT_VERITY) 21153dcf5451SChristoph Hellwig 2116e2b911c5SDarrick J. Wong #define EXTN_FEATURE_FUNCS(ver) \ 2117e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_compat_features(struct super_block *sb) \ 2118e2b911c5SDarrick J. Wong { \ 2119e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_compat & \ 2120e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_COMPAT_SUPP)) != 0); \ 2121e2b911c5SDarrick J. Wong } \ 2122e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_ro_compat_features(struct super_block *sb) \ 2123e2b911c5SDarrick J. Wong { \ 2124e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ 2125e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_RO_COMPAT_SUPP)) != 0); \ 2126e2b911c5SDarrick J. Wong } \ 2127e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_incompat_features(struct super_block *sb) \ 2128e2b911c5SDarrick J. Wong { \ 2129e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ 2130e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_INCOMPAT_SUPP)) != 0); \ 2131e2b911c5SDarrick J. Wong } 2132e2b911c5SDarrick J. Wong 2133e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(2) 2134e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(3) 2135e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(4) 2136e2b911c5SDarrick J. Wong 2137e2b911c5SDarrick J. Wong static inline bool ext4_has_compat_features(struct super_block *sb) 2138e2b911c5SDarrick J. Wong { 2139e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_compat != 0); 2140e2b911c5SDarrick J. Wong } 2141e2b911c5SDarrick J. Wong static inline bool ext4_has_ro_compat_features(struct super_block *sb) 2142e2b911c5SDarrick J. Wong { 2143e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_ro_compat != 0); 2144e2b911c5SDarrick J. Wong } 2145e2b911c5SDarrick J. Wong static inline bool ext4_has_incompat_features(struct super_block *sb) 2146e2b911c5SDarrick J. Wong { 2147e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_incompat != 0); 2148e2b911c5SDarrick J. Wong } 2149e2b911c5SDarrick J. Wong 21503dcf5451SChristoph Hellwig /* 21519549a168STheodore Ts'o * Superblock flags 21529549a168STheodore Ts'o */ 21539549a168STheodore Ts'o #define EXT4_FLAGS_RESIZING 0 21540db1ff22STheodore Ts'o #define EXT4_FLAGS_SHUTDOWN 1 2155a8ab6d38SIra Weiny #define EXT4_FLAGS_BDEV_IS_DAX 2 21560db1ff22STheodore Ts'o 21570db1ff22STheodore Ts'o static inline int ext4_forced_shutdown(struct ext4_sb_info *sbi) 21580db1ff22STheodore Ts'o { 21590db1ff22STheodore Ts'o return test_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 21600db1ff22STheodore Ts'o } 21619549a168STheodore Ts'o 21629549a168STheodore Ts'o 21639549a168STheodore Ts'o /* 21643dcf5451SChristoph Hellwig * Default values for user and/or group using reserved blocks 21653dcf5451SChristoph Hellwig */ 21663dcf5451SChristoph Hellwig #define EXT4_DEF_RESUID 0 21673dcf5451SChristoph Hellwig #define EXT4_DEF_RESGID 0 21683dcf5451SChristoph Hellwig 2169040cb378SLi Xi /* 2170040cb378SLi Xi * Default project ID 2171040cb378SLi Xi */ 2172040cb378SLi Xi #define EXT4_DEF_PROJID 0 2173040cb378SLi Xi 2174240799cdSTheodore Ts'o #define EXT4_DEF_INODE_READAHEAD_BLKS 32 2175240799cdSTheodore Ts'o 21763dcf5451SChristoph Hellwig /* 21773dcf5451SChristoph Hellwig * Default mount options 21783dcf5451SChristoph Hellwig */ 21793dcf5451SChristoph Hellwig #define EXT4_DEFM_DEBUG 0x0001 21803dcf5451SChristoph Hellwig #define EXT4_DEFM_BSDGROUPS 0x0002 21813dcf5451SChristoph Hellwig #define EXT4_DEFM_XATTR_USER 0x0004 21823dcf5451SChristoph Hellwig #define EXT4_DEFM_ACL 0x0008 21833dcf5451SChristoph Hellwig #define EXT4_DEFM_UID16 0x0010 21843dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE 0x0060 21853dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_DATA 0x0020 21863dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_ORDERED 0x0040 21873dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_WBACK 0x0060 21888b67f04aSTheodore Ts'o #define EXT4_DEFM_NOBARRIER 0x0100 21898b67f04aSTheodore Ts'o #define EXT4_DEFM_BLOCK_VALIDITY 0x0200 21908b67f04aSTheodore Ts'o #define EXT4_DEFM_DISCARD 0x0400 21918b67f04aSTheodore Ts'o #define EXT4_DEFM_NODELALLOC 0x0800 21923dcf5451SChristoph Hellwig 21933dcf5451SChristoph Hellwig /* 219430773840STheodore Ts'o * Default journal batch times 219530773840STheodore Ts'o */ 219630773840STheodore Ts'o #define EXT4_DEF_MIN_BATCH_TIME 0 219730773840STheodore Ts'o #define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ 219830773840STheodore Ts'o 219930773840STheodore Ts'o /* 2200a4912123STheodore Ts'o * Minimum number of groups in a flexgroup before we separate out 2201a4912123STheodore Ts'o * directories into the first block group of a flexgroup 2202a4912123STheodore Ts'o */ 2203a4912123STheodore Ts'o #define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4 2204a4912123STheodore Ts'o 2205a4912123STheodore Ts'o /* 22063dcf5451SChristoph Hellwig * Structure of a directory entry 22073dcf5451SChristoph Hellwig */ 22083dcf5451SChristoph Hellwig #define EXT4_NAME_LEN 255 22093dcf5451SChristoph Hellwig 22103dcf5451SChristoph Hellwig struct ext4_dir_entry { 22113dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 22123dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 22133dcf5451SChristoph Hellwig __le16 name_len; /* Name length */ 22143dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 22153dcf5451SChristoph Hellwig }; 22163dcf5451SChristoph Hellwig 2217471fbbeaSDaniel Rosenberg 2218471fbbeaSDaniel Rosenberg /* 2219471fbbeaSDaniel Rosenberg * Encrypted Casefolded entries require saving the hash on disk. This structure 2220471fbbeaSDaniel Rosenberg * followed ext4_dir_entry_2's name[name_len] at the next 4 byte aligned 2221471fbbeaSDaniel Rosenberg * boundary. 2222471fbbeaSDaniel Rosenberg */ 2223471fbbeaSDaniel Rosenberg struct ext4_dir_entry_hash { 2224471fbbeaSDaniel Rosenberg __le32 hash; 2225471fbbeaSDaniel Rosenberg __le32 minor_hash; 2226471fbbeaSDaniel Rosenberg }; 2227471fbbeaSDaniel Rosenberg 22283dcf5451SChristoph Hellwig /* 22293dcf5451SChristoph Hellwig * The new version of the directory entry. Since EXT4 structures are 22303dcf5451SChristoph Hellwig * stored in intel byte order, and the name_len field could never be 22313dcf5451SChristoph Hellwig * bigger than 255 chars, it's safe to reclaim the extra byte for the 22323dcf5451SChristoph Hellwig * file_type field. 22333dcf5451SChristoph Hellwig */ 22343dcf5451SChristoph Hellwig struct ext4_dir_entry_2 { 22353dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 22363dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 22373dcf5451SChristoph Hellwig __u8 name_len; /* Name length */ 22389f364e1dSJonathan Grant __u8 file_type; /* See file type macros EXT4_FT_* below */ 22393dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 22403dcf5451SChristoph Hellwig }; 22413dcf5451SChristoph Hellwig 22423dcf5451SChristoph Hellwig /* 2243471fbbeaSDaniel Rosenberg * Access the hashes at the end of ext4_dir_entry_2 2244471fbbeaSDaniel Rosenberg */ 2245471fbbeaSDaniel Rosenberg #define EXT4_DIRENT_HASHES(entry) \ 2246471fbbeaSDaniel Rosenberg ((struct ext4_dir_entry_hash *) \ 2247471fbbeaSDaniel Rosenberg (((void *)(entry)) + \ 2248471fbbeaSDaniel Rosenberg ((8 + (entry)->name_len + EXT4_DIR_ROUND) & ~EXT4_DIR_ROUND))) 2249471fbbeaSDaniel Rosenberg #define EXT4_DIRENT_HASH(entry) le32_to_cpu(EXT4_DIRENT_HASHES(de)->hash) 2250471fbbeaSDaniel Rosenberg #define EXT4_DIRENT_MINOR_HASH(entry) \ 2251471fbbeaSDaniel Rosenberg le32_to_cpu(EXT4_DIRENT_HASHES(de)->minor_hash) 2252471fbbeaSDaniel Rosenberg 2253471fbbeaSDaniel Rosenberg static inline bool ext4_hash_in_dirent(const struct inode *inode) 2254471fbbeaSDaniel Rosenberg { 2255471fbbeaSDaniel Rosenberg return IS_CASEFOLDED(inode) && IS_ENCRYPTED(inode); 2256471fbbeaSDaniel Rosenberg } 2257471fbbeaSDaniel Rosenberg 2258471fbbeaSDaniel Rosenberg /* 2259e6153918SDarrick J. Wong * This is a bogus directory entry at the end of each leaf block that 2260e6153918SDarrick J. Wong * records checksums. 2261e6153918SDarrick J. Wong */ 2262e6153918SDarrick J. Wong struct ext4_dir_entry_tail { 2263e6153918SDarrick J. Wong __le32 det_reserved_zero1; /* Pretend to be unused */ 2264e6153918SDarrick J. Wong __le16 det_rec_len; /* 12 */ 2265e6153918SDarrick J. Wong __u8 det_reserved_zero2; /* Zero name length */ 2266e6153918SDarrick J. Wong __u8 det_reserved_ft; /* 0xDE, fake file type */ 2267e6153918SDarrick J. Wong __le32 det_checksum; /* crc32c(uuid+inum+dirblock) */ 2268e6153918SDarrick J. Wong }; 2269e6153918SDarrick J. Wong 22703c47d541STao Ma #define EXT4_DIRENT_TAIL(block, blocksize) \ 22713c47d541STao Ma ((struct ext4_dir_entry_tail *)(((void *)(block)) + \ 22723c47d541STao Ma ((blocksize) - \ 22733c47d541STao Ma sizeof(struct ext4_dir_entry_tail)))) 22743c47d541STao Ma 2275e6153918SDarrick J. Wong /* 22763dcf5451SChristoph Hellwig * Ext4 directory file types. Only the low 3 bits are used. The 22773dcf5451SChristoph Hellwig * other bits are reserved for now. 22783dcf5451SChristoph Hellwig */ 22793dcf5451SChristoph Hellwig #define EXT4_FT_UNKNOWN 0 22803dcf5451SChristoph Hellwig #define EXT4_FT_REG_FILE 1 22813dcf5451SChristoph Hellwig #define EXT4_FT_DIR 2 22823dcf5451SChristoph Hellwig #define EXT4_FT_CHRDEV 3 22833dcf5451SChristoph Hellwig #define EXT4_FT_BLKDEV 4 22843dcf5451SChristoph Hellwig #define EXT4_FT_FIFO 5 22853dcf5451SChristoph Hellwig #define EXT4_FT_SOCK 6 22863dcf5451SChristoph Hellwig #define EXT4_FT_SYMLINK 7 22873dcf5451SChristoph Hellwig 22883dcf5451SChristoph Hellwig #define EXT4_FT_MAX 8 22893dcf5451SChristoph Hellwig 2290e6153918SDarrick J. Wong #define EXT4_FT_DIR_CSUM 0xDE 2291e6153918SDarrick J. Wong 22923dcf5451SChristoph Hellwig /* 22933dcf5451SChristoph Hellwig * EXT4_DIR_PAD defines the directory entries boundaries 22943dcf5451SChristoph Hellwig * 22953dcf5451SChristoph Hellwig * NOTE: It must be a multiple of 4 22963dcf5451SChristoph Hellwig */ 22973dcf5451SChristoph Hellwig #define EXT4_DIR_PAD 4 22983dcf5451SChristoph Hellwig #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) 22993dcf5451SChristoph Hellwig #define EXT4_MAX_REC_LEN ((1<<16)-1) 23003dcf5451SChristoph Hellwig 23013dcf5451SChristoph Hellwig /* 2302471fbbeaSDaniel Rosenberg * The rec_len is dependent on the type of directory. Directories that are 2303471fbbeaSDaniel Rosenberg * casefolded and encrypted need to store the hash as well, so we add room for 2304471fbbeaSDaniel Rosenberg * ext4_extended_dir_entry_2. For all entries related to '.' or '..' you should 2305471fbbeaSDaniel Rosenberg * pass NULL for dir, as those entries do not use the extra fields. 2306471fbbeaSDaniel Rosenberg */ 2307471fbbeaSDaniel Rosenberg static inline unsigned int ext4_dir_rec_len(__u8 name_len, 2308471fbbeaSDaniel Rosenberg const struct inode *dir) 2309471fbbeaSDaniel Rosenberg { 2310471fbbeaSDaniel Rosenberg int rec_len = (name_len + 8 + EXT4_DIR_ROUND); 2311471fbbeaSDaniel Rosenberg 2312471fbbeaSDaniel Rosenberg if (dir && ext4_hash_in_dirent(dir)) 2313471fbbeaSDaniel Rosenberg rec_len += sizeof(struct ext4_dir_entry_hash); 2314471fbbeaSDaniel Rosenberg return (rec_len & ~EXT4_DIR_ROUND); 2315471fbbeaSDaniel Rosenberg } 2316471fbbeaSDaniel Rosenberg 2317471fbbeaSDaniel Rosenberg /* 23180cfc9255SEric Sandeen * If we ever get support for fs block sizes > page_size, we'll need 23190cfc9255SEric Sandeen * to remove the #if statements in the next two functions... 23200cfc9255SEric Sandeen */ 23210cfc9255SEric Sandeen static inline unsigned int 23220cfc9255SEric Sandeen ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize) 23230cfc9255SEric Sandeen { 23240cfc9255SEric Sandeen unsigned len = le16_to_cpu(dlen); 23250cfc9255SEric Sandeen 2326ea1754a0SKirill A. Shutemov #if (PAGE_SIZE >= 65536) 23270cfc9255SEric Sandeen if (len == EXT4_MAX_REC_LEN || len == 0) 23280cfc9255SEric Sandeen return blocksize; 23290cfc9255SEric Sandeen return (len & 65532) | ((len & 3) << 16); 23300cfc9255SEric Sandeen #else 23310cfc9255SEric Sandeen return len; 23320cfc9255SEric Sandeen #endif 23330cfc9255SEric Sandeen } 23340cfc9255SEric Sandeen 23350cfc9255SEric Sandeen static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize) 23360cfc9255SEric Sandeen { 23370cfc9255SEric Sandeen if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3)) 23380cfc9255SEric Sandeen BUG(); 2339ea1754a0SKirill A. Shutemov #if (PAGE_SIZE >= 65536) 23400cfc9255SEric Sandeen if (len < 65536) 23410cfc9255SEric Sandeen return cpu_to_le16(len); 23420cfc9255SEric Sandeen if (len == blocksize) { 23430cfc9255SEric Sandeen if (blocksize == 65536) 23440cfc9255SEric Sandeen return cpu_to_le16(EXT4_MAX_REC_LEN); 23450cfc9255SEric Sandeen else 23460cfc9255SEric Sandeen return cpu_to_le16(0); 23470cfc9255SEric Sandeen } 23480cfc9255SEric Sandeen return cpu_to_le16((len & 65532) | ((len >> 16) & 3)); 23490cfc9255SEric Sandeen #else 23500cfc9255SEric Sandeen return cpu_to_le16(len); 23510cfc9255SEric Sandeen #endif 23520cfc9255SEric Sandeen } 23530cfc9255SEric Sandeen 23540cfc9255SEric Sandeen /* 23553dcf5451SChristoph Hellwig * Hash Tree Directory indexing 23563dcf5451SChristoph Hellwig * (c) Daniel Phillips, 2001 23573dcf5451SChristoph Hellwig */ 23583dcf5451SChristoph Hellwig 2359e2b911c5SDarrick J. Wong #define is_dx(dir) (ext4_has_feature_dir_index((dir)->i_sb) && \ 236012e9b892SDmitry Monakhov ext4_test_inode_flag((dir), EXT4_INODE_INDEX)) 2361c7414892SAndreas Dilger #define EXT4_DIR_LINK_MAX(dir) unlikely((dir)->i_nlink >= EXT4_LINK_MAX && \ 2362c7414892SAndreas Dilger !(ext4_has_feature_dir_nlink((dir)->i_sb) && is_dx(dir))) 23633dcf5451SChristoph Hellwig #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) 23643dcf5451SChristoph Hellwig 23653dcf5451SChristoph Hellwig /* Legal values for the dx_root hash_version field: */ 23663dcf5451SChristoph Hellwig 23673dcf5451SChristoph Hellwig #define DX_HASH_LEGACY 0 23683dcf5451SChristoph Hellwig #define DX_HASH_HALF_MD4 1 23693dcf5451SChristoph Hellwig #define DX_HASH_TEA 2 2370f99b2589STheodore Ts'o #define DX_HASH_LEGACY_UNSIGNED 3 2371f99b2589STheodore Ts'o #define DX_HASH_HALF_MD4_UNSIGNED 4 2372f99b2589STheodore Ts'o #define DX_HASH_TEA_UNSIGNED 5 2373471fbbeaSDaniel Rosenberg #define DX_HASH_SIPHASH 6 23743dcf5451SChristoph Hellwig 23750441984aSDarrick J. Wong static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc, 23760441984aSDarrick J. Wong const void *address, unsigned int length) 23770441984aSDarrick J. Wong { 23780441984aSDarrick J. Wong struct { 23790441984aSDarrick J. Wong struct shash_desc shash; 23803108b54bSTheodore Ts'o char ctx[4]; 23810441984aSDarrick J. Wong } desc; 23820441984aSDarrick J. Wong 23833108b54bSTheodore Ts'o BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx)); 23843108b54bSTheodore Ts'o 23850441984aSDarrick J. Wong desc.shash.tfm = sbi->s_chksum_driver; 23860441984aSDarrick J. Wong *(u32 *)desc.ctx = crc; 23870441984aSDarrick J. Wong 2388e7093f0dSPetros Koutoupis BUG_ON(crypto_shash_update(&desc.shash, address, length)); 23890441984aSDarrick J. Wong 23900441984aSDarrick J. Wong return *(u32 *)desc.ctx; 23910441984aSDarrick J. Wong } 23920441984aSDarrick J. Wong 23933dcf5451SChristoph Hellwig #ifdef __KERNEL__ 23943dcf5451SChristoph Hellwig 23953dcf5451SChristoph Hellwig /* hash info structure used by the directory hash */ 23963dcf5451SChristoph Hellwig struct dx_hash_info 23973dcf5451SChristoph Hellwig { 23983dcf5451SChristoph Hellwig u32 hash; 23993dcf5451SChristoph Hellwig u32 minor_hash; 24003dcf5451SChristoph Hellwig int hash_version; 24013dcf5451SChristoph Hellwig u32 *seed; 24023dcf5451SChristoph Hellwig }; 24033dcf5451SChristoph Hellwig 2404d1f5273eSFan Yong 2405d1f5273eSFan Yong /* 32 and 64 bit signed EOF for dx directories */ 2406d1f5273eSFan Yong #define EXT4_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1) 2407d1f5273eSFan Yong #define EXT4_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1) 2408d1f5273eSFan Yong 24093dcf5451SChristoph Hellwig 24103dcf5451SChristoph Hellwig /* 24113dcf5451SChristoph Hellwig * Control parameters used by ext4_htree_next_block 24123dcf5451SChristoph Hellwig */ 24133dcf5451SChristoph Hellwig #define HASH_NB_ALWAYS 1 24143dcf5451SChristoph Hellwig 24155b643f9cSTheodore Ts'o struct ext4_filename { 24165b643f9cSTheodore Ts'o const struct qstr *usr_fname; 2417a7550b30SJaegeuk Kim struct fscrypt_str disk_name; 24185b643f9cSTheodore Ts'o struct dx_hash_info hinfo; 2419643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 2420a7550b30SJaegeuk Kim struct fscrypt_str crypto_buf; 24215b643f9cSTheodore Ts'o #endif 24223ae72562SGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 24233ae72562SGabriel Krisman Bertazi struct fscrypt_str cf_name; 24243ae72562SGabriel Krisman Bertazi #endif 24255b643f9cSTheodore Ts'o }; 24265b643f9cSTheodore Ts'o 24275b643f9cSTheodore Ts'o #define fname_name(p) ((p)->disk_name.name) 2428471fbbeaSDaniel Rosenberg #define fname_usr_name(p) ((p)->usr_fname->name) 24295b643f9cSTheodore Ts'o #define fname_len(p) ((p)->disk_name.len) 24303dcf5451SChristoph Hellwig 24313dcf5451SChristoph Hellwig /* 24323dcf5451SChristoph Hellwig * Describe an inode's exact location on disk and in memory 24333dcf5451SChristoph Hellwig */ 24343dcf5451SChristoph Hellwig struct ext4_iloc 24353dcf5451SChristoph Hellwig { 24363dcf5451SChristoph Hellwig struct buffer_head *bh; 24373dcf5451SChristoph Hellwig unsigned long offset; 24383dcf5451SChristoph Hellwig ext4_group_t block_group; 24393dcf5451SChristoph Hellwig }; 24403dcf5451SChristoph Hellwig 24413dcf5451SChristoph Hellwig static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) 24423dcf5451SChristoph Hellwig { 24433dcf5451SChristoph Hellwig return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); 24443dcf5451SChristoph Hellwig } 24453dcf5451SChristoph Hellwig 2446dec214d0STahsin Erdogan static inline bool ext4_is_quota_file(struct inode *inode) 2447dec214d0STahsin Erdogan { 2448dec214d0STahsin Erdogan return IS_NOQUOTA(inode) && 2449dec214d0STahsin Erdogan !(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL); 2450dec214d0STahsin Erdogan } 245102749a4cSTahsin Erdogan 24523dcf5451SChristoph Hellwig /* 24533dcf5451SChristoph Hellwig * This structure is stuffed into the struct file's private_data field 24543dcf5451SChristoph Hellwig * for directories. It is where we put information so that we can do 24553dcf5451SChristoph Hellwig * readdir operations in hash tree order. 24563dcf5451SChristoph Hellwig */ 24573dcf5451SChristoph Hellwig struct dir_private_info { 24583dcf5451SChristoph Hellwig struct rb_root root; 24593dcf5451SChristoph Hellwig struct rb_node *curr_node; 24603dcf5451SChristoph Hellwig struct fname *extra_fname; 24613dcf5451SChristoph Hellwig loff_t last_pos; 24623dcf5451SChristoph Hellwig __u32 curr_hash; 24633dcf5451SChristoph Hellwig __u32 curr_minor_hash; 24643dcf5451SChristoph Hellwig __u32 next_hash; 24653dcf5451SChristoph Hellwig }; 24663dcf5451SChristoph Hellwig 24673dcf5451SChristoph Hellwig /* calculate the first block number of the group */ 24683dcf5451SChristoph Hellwig static inline ext4_fsblk_t 24693dcf5451SChristoph Hellwig ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) 24703dcf5451SChristoph Hellwig { 24713dcf5451SChristoph Hellwig return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + 24723dcf5451SChristoph Hellwig le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); 24733dcf5451SChristoph Hellwig } 24743dcf5451SChristoph Hellwig 24753dcf5451SChristoph Hellwig /* 24763dcf5451SChristoph Hellwig * Special error return code only used by dx_probe() and its callers. 24773dcf5451SChristoph Hellwig */ 247836de9286STheodore Ts'o #define ERR_BAD_DX_DIR (-(MAX_ERRNO - 1)) 24793dcf5451SChristoph Hellwig 2480e08ac99fSArtem Blagodarenko /* htree levels for ext4 */ 2481e08ac99fSArtem Blagodarenko #define EXT4_HTREE_LEVEL_COMPAT 2 2482e08ac99fSArtem Blagodarenko #define EXT4_HTREE_LEVEL 3 2483e08ac99fSArtem Blagodarenko 2484e08ac99fSArtem Blagodarenko static inline int ext4_dir_htree_level(struct super_block *sb) 2485e08ac99fSArtem Blagodarenko { 2486e08ac99fSArtem Blagodarenko return ext4_has_feature_largedir(sb) ? 2487e08ac99fSArtem Blagodarenko EXT4_HTREE_LEVEL : EXT4_HTREE_LEVEL_COMPAT; 2488e08ac99fSArtem Blagodarenko } 2489e08ac99fSArtem Blagodarenko 24903dcf5451SChristoph Hellwig /* 2491bfff6873SLukas Czerner * Timeout and state flag for lazy initialization inode thread. 2492bfff6873SLukas Czerner */ 2493bfff6873SLukas Czerner #define EXT4_DEF_LI_WAIT_MULT 10 2494bfff6873SLukas Czerner #define EXT4_DEF_LI_MAX_START_DELAY 5 2495bfff6873SLukas Czerner #define EXT4_LAZYINIT_QUIT 0x0001 2496bfff6873SLukas Czerner #define EXT4_LAZYINIT_RUNNING 0x0002 2497bfff6873SLukas Czerner 2498bfff6873SLukas Czerner /* 2499bfff6873SLukas Czerner * Lazy inode table initialization info 2500bfff6873SLukas Czerner */ 2501bfff6873SLukas Czerner struct ext4_lazy_init { 2502bfff6873SLukas Czerner unsigned long li_state; 2503bfff6873SLukas Czerner struct list_head li_request_list; 2504bfff6873SLukas Czerner struct mutex li_list_mtx; 2505bfff6873SLukas Czerner }; 2506bfff6873SLukas Czerner 25073d392b26STheodore Ts'o enum ext4_li_mode { 25083d392b26STheodore Ts'o EXT4_LI_MODE_PREFETCH_BBITMAP, 25093d392b26STheodore Ts'o EXT4_LI_MODE_ITABLE, 25103d392b26STheodore Ts'o }; 25113d392b26STheodore Ts'o 2512bfff6873SLukas Czerner struct ext4_li_request { 2513bfff6873SLukas Czerner struct super_block *lr_super; 25143d392b26STheodore Ts'o enum ext4_li_mode lr_mode; 25153d392b26STheodore Ts'o ext4_group_t lr_first_not_zeroed; 2516bfff6873SLukas Czerner ext4_group_t lr_next_group; 2517bfff6873SLukas Czerner struct list_head lr_request; 2518bfff6873SLukas Czerner unsigned long lr_next_sched; 2519bfff6873SLukas Czerner unsigned long lr_timeout; 2520bfff6873SLukas Czerner }; 2521bfff6873SLukas Czerner 2522857ac889SLukas Czerner struct ext4_features { 2523857ac889SLukas Czerner struct kobject f_kobj; 2524857ac889SLukas Czerner struct completion f_kobj_unregister; 2525857ac889SLukas Czerner }; 2526857ac889SLukas Czerner 2527bfff6873SLukas Czerner /* 2528c5e06d10SJohann Lombardi * This structure will be used for multiple mount protection. It will be 2529c5e06d10SJohann Lombardi * written into the block number saved in the s_mmp_block field in the 2530c5e06d10SJohann Lombardi * superblock. Programs that check MMP should assume that if 2531c5e06d10SJohann Lombardi * SEQ_FSCK (or any unknown code above SEQ_MAX) is present then it is NOT safe 2532c5e06d10SJohann Lombardi * to use the filesystem, regardless of how old the timestamp is. 2533c5e06d10SJohann Lombardi */ 2534c5e06d10SJohann Lombardi #define EXT4_MMP_MAGIC 0x004D4D50U /* ASCII for MMP */ 2535c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U /* mmp_seq value for clean unmount */ 2536c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_FSCK 0xE24D4D50U /* mmp_seq value when being fscked */ 2537c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_MAX 0xE24D4D4FU /* maximum valid mmp_seq value */ 2538c5e06d10SJohann Lombardi 2539c5e06d10SJohann Lombardi struct mmp_struct { 2540c5e06d10SJohann Lombardi __le32 mmp_magic; /* Magic number for MMP */ 2541c5e06d10SJohann Lombardi __le32 mmp_seq; /* Sequence no. updated periodically */ 2542c5e06d10SJohann Lombardi 2543c5e06d10SJohann Lombardi /* 2544c5e06d10SJohann Lombardi * mmp_time, mmp_nodename & mmp_bdevname are only used for information 2545c5e06d10SJohann Lombardi * purposes and do not affect the correctness of the algorithm 2546c5e06d10SJohann Lombardi */ 2547c5e06d10SJohann Lombardi __le64 mmp_time; /* Time last updated */ 2548c5e06d10SJohann Lombardi char mmp_nodename[64]; /* Node which last updated MMP block */ 2549c5e06d10SJohann Lombardi char mmp_bdevname[32]; /* Bdev which last updated MMP block */ 2550c5e06d10SJohann Lombardi 2551c5e06d10SJohann Lombardi /* 2552c5e06d10SJohann Lombardi * mmp_check_interval is used to verify if the MMP block has been 2553c5e06d10SJohann Lombardi * updated on the block device. The value is updated based on the 2554c5e06d10SJohann Lombardi * maximum time to write the MMP block during an update cycle. 2555c5e06d10SJohann Lombardi */ 2556c5e06d10SJohann Lombardi __le16 mmp_check_interval; 2557c5e06d10SJohann Lombardi 2558c5e06d10SJohann Lombardi __le16 mmp_pad1; 2559e6153918SDarrick J. Wong __le32 mmp_pad2[226]; 2560e6153918SDarrick J. Wong __le32 mmp_checksum; /* crc32c(uuid+mmp_block) */ 2561c5e06d10SJohann Lombardi }; 2562c5e06d10SJohann Lombardi 2563c5e06d10SJohann Lombardi /* arguments passed to the mmp thread */ 2564c5e06d10SJohann Lombardi struct mmpd_data { 2565c5e06d10SJohann Lombardi struct buffer_head *bh; /* bh from initial read_mmp_block() */ 2566c5e06d10SJohann Lombardi struct super_block *sb; /* super block of the fs */ 2567c5e06d10SJohann Lombardi }; 2568c5e06d10SJohann Lombardi 2569c5e06d10SJohann Lombardi /* 2570c5e06d10SJohann Lombardi * Check interval multiplier 2571c5e06d10SJohann Lombardi * The MMP block is written every update interval and initially checked every 2572c5e06d10SJohann Lombardi * update interval x the multiplier (the value is then adapted based on the 2573c5e06d10SJohann Lombardi * write latency). The reason is that writes can be delayed under load and we 2574c5e06d10SJohann Lombardi * don't want readers to incorrectly assume that the filesystem is no longer 2575c5e06d10SJohann Lombardi * in use. 2576c5e06d10SJohann Lombardi */ 2577c5e06d10SJohann Lombardi #define EXT4_MMP_CHECK_MULT 2UL 2578c5e06d10SJohann Lombardi 2579c5e06d10SJohann Lombardi /* 2580c5e06d10SJohann Lombardi * Minimum interval for MMP checking in seconds. 2581c5e06d10SJohann Lombardi */ 2582c5e06d10SJohann Lombardi #define EXT4_MMP_MIN_CHECK_INTERVAL 5UL 2583c5e06d10SJohann Lombardi 2584c5e06d10SJohann Lombardi /* 2585c5e06d10SJohann Lombardi * Maximum interval for MMP checking in seconds. 2586c5e06d10SJohann Lombardi */ 2587c5e06d10SJohann Lombardi #define EXT4_MMP_MAX_CHECK_INTERVAL 300UL 2588c5e06d10SJohann Lombardi 2589c5e06d10SJohann Lombardi /* 25903dcf5451SChristoph Hellwig * Function prototypes 25913dcf5451SChristoph Hellwig */ 25923dcf5451SChristoph Hellwig 25933dcf5451SChristoph Hellwig /* 25943dcf5451SChristoph Hellwig * Ok, these declarations are also in <linux/kernel.h> but none of the 25953dcf5451SChristoph Hellwig * ext4 source programs needs to include it so they are duplicated here. 25963dcf5451SChristoph Hellwig */ 25973dcf5451SChristoph Hellwig # define NORET_TYPE /**/ 25983dcf5451SChristoph Hellwig # define ATTRIB_NORET __attribute__((noreturn)) 25993dcf5451SChristoph Hellwig # define NORET_AND noreturn, 26003dcf5451SChristoph Hellwig 2601498e5f24STheodore Ts'o /* bitmap.c */ 2602f6fb99caSTheodore Ts'o extern unsigned int ext4_count_free(char *bitmap, unsigned numchars); 260341a246d1SDarrick J. Wong void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 260441a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 260541a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 260641a246d1SDarrick J. Wong int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 260741a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 260841a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 2609fa77dcfaSDarrick J. Wong void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 2610fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 261179f1ba49STao Ma struct buffer_head *bh); 2612fa77dcfaSDarrick J. Wong int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 2613fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 261479f1ba49STao Ma struct buffer_head *bh); 2615498e5f24STheodore Ts'o 26163dcf5451SChristoph Hellwig /* balloc.c */ 2617bd86298eSLukas Czerner extern void ext4_get_group_no_and_offset(struct super_block *sb, 2618bd86298eSLukas Czerner ext4_fsblk_t blocknr, 2619bd86298eSLukas Czerner ext4_group_t *blockgrpp, 2620bd86298eSLukas Czerner ext4_grpblk_t *offsetp); 2621bd86298eSLukas Czerner extern ext4_group_t ext4_get_group_number(struct super_block *sb, 2622bd86298eSLukas Czerner ext4_fsblk_t block); 2623bd86298eSLukas Czerner 26243dcf5451SChristoph Hellwig extern unsigned int ext4_block_group(struct super_block *sb, 26253dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 26263dcf5451SChristoph Hellwig extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, 26273dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 26283dcf5451SChristoph Hellwig extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); 26293dcf5451SChristoph Hellwig extern unsigned long ext4_bg_num_gdb(struct super_block *sb, 26303dcf5451SChristoph Hellwig ext4_group_t group); 26317061eba7SAneesh Kumar K.V extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, 263255f020dbSAllison Henderson ext4_fsblk_t goal, 263355f020dbSAllison Henderson unsigned int flags, 263455f020dbSAllison Henderson unsigned long *count, 263555f020dbSAllison Henderson int *errp); 2636e7d5f315STheodore Ts'o extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi, 2637e7d5f315STheodore Ts'o s64 nclusters, unsigned int flags); 26385dee5437STheodore Ts'o extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *); 26393dcf5451SChristoph Hellwig extern void ext4_check_blocks_bitmap(struct super_block *); 26403dcf5451SChristoph Hellwig extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, 26413dcf5451SChristoph Hellwig ext4_group_t block_group, 26423dcf5451SChristoph Hellwig struct buffer_head ** bh); 26433dcf5451SChristoph Hellwig extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); 2644813e5727STheodore Ts'o 2645813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb, 2646cfd73237SAlex Zhuravlev ext4_group_t block_group, 2647cfd73237SAlex Zhuravlev bool ignore_locked); 2648813e5727STheodore Ts'o extern int ext4_wait_block_bitmap(struct super_block *sb, 2649813e5727STheodore Ts'o ext4_group_t block_group, 2650813e5727STheodore Ts'o struct buffer_head *bh); 2651813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, 2652bb23c20aSTheodore Ts'o ext4_group_t block_group); 2653cff1dfd7STheodore Ts'o extern unsigned ext4_free_clusters_after_init(struct super_block *sb, 2654fd034a84STheodore Ts'o ext4_group_t block_group, 2655fd034a84STheodore Ts'o struct ext4_group_desc *gdp); 2656f86186b4SEric Sandeen ext4_fsblk_t ext4_inode_to_goal_block(struct inode *); 26573dcf5451SChristoph Hellwig 26583ae72562SGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 26591ae98e29SDaniel Rosenberg extern int ext4_fname_setup_ci_filename(struct inode *dir, 26603ae72562SGabriel Krisman Bertazi const struct qstr *iname, 26611ae98e29SDaniel Rosenberg struct ext4_filename *fname); 26623ae72562SGabriel Krisman Bertazi #endif 26633ae72562SGabriel Krisman Bertazi 2664643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 2665b01531dbSEric Biggers static inline void ext4_fname_from_fscrypt_name(struct ext4_filename *dst, 2666b01531dbSEric Biggers const struct fscrypt_name *src) 2667b01531dbSEric Biggers { 2668b01531dbSEric Biggers memset(dst, 0, sizeof(*dst)); 2669b01531dbSEric Biggers 2670b01531dbSEric Biggers dst->usr_fname = src->usr_fname; 2671b01531dbSEric Biggers dst->disk_name = src->disk_name; 2672b01531dbSEric Biggers dst->hinfo.hash = src->hash; 2673b01531dbSEric Biggers dst->hinfo.minor_hash = src->minor_hash; 2674b01531dbSEric Biggers dst->crypto_buf = src->crypto_buf; 2675b01531dbSEric Biggers } 2676b01531dbSEric Biggers 2677a7550b30SJaegeuk Kim static inline int ext4_fname_setup_filename(struct inode *dir, 2678a7550b30SJaegeuk Kim const struct qstr *iname, 2679b01531dbSEric Biggers int lookup, 2680b01531dbSEric Biggers struct ext4_filename *fname) 2681a7550b30SJaegeuk Kim { 2682a7550b30SJaegeuk Kim struct fscrypt_name name; 2683a7550b30SJaegeuk Kim int err; 2684a7550b30SJaegeuk Kim 2685a7550b30SJaegeuk Kim err = fscrypt_setup_filename(dir, iname, lookup, &name); 2686b01531dbSEric Biggers if (err) 2687a7550b30SJaegeuk Kim return err; 2688b01531dbSEric Biggers 2689b01531dbSEric Biggers ext4_fname_from_fscrypt_name(fname, &name); 26903ae72562SGabriel Krisman Bertazi 26913ae72562SGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 26921ae98e29SDaniel Rosenberg err = ext4_fname_setup_ci_filename(dir, iname, fname); 26933ae72562SGabriel Krisman Bertazi #endif 26941ae98e29SDaniel Rosenberg return err; 2695b01531dbSEric Biggers } 2696b01531dbSEric Biggers 2697b01531dbSEric Biggers static inline int ext4_fname_prepare_lookup(struct inode *dir, 2698b01531dbSEric Biggers struct dentry *dentry, 2699b01531dbSEric Biggers struct ext4_filename *fname) 2700b01531dbSEric Biggers { 2701b01531dbSEric Biggers struct fscrypt_name name; 2702b01531dbSEric Biggers int err; 2703b01531dbSEric Biggers 2704b01531dbSEric Biggers err = fscrypt_prepare_lookup(dir, dentry, &name); 2705b01531dbSEric Biggers if (err) 2706b01531dbSEric Biggers return err; 2707b01531dbSEric Biggers 2708b01531dbSEric Biggers ext4_fname_from_fscrypt_name(fname, &name); 27093ae72562SGabriel Krisman Bertazi 27103ae72562SGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 27111ae98e29SDaniel Rosenberg err = ext4_fname_setup_ci_filename(dir, &dentry->d_name, fname); 27123ae72562SGabriel Krisman Bertazi #endif 27131ae98e29SDaniel Rosenberg return err; 2714a7550b30SJaegeuk Kim } 2715a7550b30SJaegeuk Kim 2716a7550b30SJaegeuk Kim static inline void ext4_fname_free_filename(struct ext4_filename *fname) 2717a7550b30SJaegeuk Kim { 2718a7550b30SJaegeuk Kim struct fscrypt_name name; 2719a7550b30SJaegeuk Kim 2720a7550b30SJaegeuk Kim name.crypto_buf = fname->crypto_buf; 2721a7550b30SJaegeuk Kim fscrypt_free_filename(&name); 2722a7550b30SJaegeuk Kim 2723a7550b30SJaegeuk Kim fname->crypto_buf.name = NULL; 2724a7550b30SJaegeuk Kim fname->usr_fname = NULL; 2725a7550b30SJaegeuk Kim fname->disk_name.name = NULL; 27263ae72562SGabriel Krisman Bertazi 27273ae72562SGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 27283ae72562SGabriel Krisman Bertazi kfree(fname->cf_name.name); 27293ae72562SGabriel Krisman Bertazi fname->cf_name.name = NULL; 27303ae72562SGabriel Krisman Bertazi #endif 2731a7550b30SJaegeuk Kim } 2732b01531dbSEric Biggers #else /* !CONFIG_FS_ENCRYPTION */ 27335b643f9cSTheodore Ts'o static inline int ext4_fname_setup_filename(struct inode *dir, 27345b643f9cSTheodore Ts'o const struct qstr *iname, 2735b01531dbSEric Biggers int lookup, 2736b01531dbSEric Biggers struct ext4_filename *fname) 27375b643f9cSTheodore Ts'o { 27381ae98e29SDaniel Rosenberg int err = 0; 27395b643f9cSTheodore Ts'o fname->usr_fname = iname; 27405b643f9cSTheodore Ts'o fname->disk_name.name = (unsigned char *) iname->name; 27415b643f9cSTheodore Ts'o fname->disk_name.len = iname->len; 27423ae72562SGabriel Krisman Bertazi 27433ae72562SGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 27441ae98e29SDaniel Rosenberg err = ext4_fname_setup_ci_filename(dir, iname, fname); 27453ae72562SGabriel Krisman Bertazi #endif 27463ae72562SGabriel Krisman Bertazi 27471ae98e29SDaniel Rosenberg return err; 27485b643f9cSTheodore Ts'o } 2749a7550b30SJaegeuk Kim 2750b01531dbSEric Biggers static inline int ext4_fname_prepare_lookup(struct inode *dir, 2751b01531dbSEric Biggers struct dentry *dentry, 2752b01531dbSEric Biggers struct ext4_filename *fname) 2753b01531dbSEric Biggers { 2754b01531dbSEric Biggers return ext4_fname_setup_filename(dir, &dentry->d_name, 1, fname); 2755b01531dbSEric Biggers } 2756b01531dbSEric Biggers 27573ae72562SGabriel Krisman Bertazi static inline void ext4_fname_free_filename(struct ext4_filename *fname) 27583ae72562SGabriel Krisman Bertazi { 27593ae72562SGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 27603ae72562SGabriel Krisman Bertazi kfree(fname->cf_name.name); 27613ae72562SGabriel Krisman Bertazi fname->cf_name.name = NULL; 27623ae72562SGabriel Krisman Bertazi #endif 27633ae72562SGabriel Krisman Bertazi } 2764b01531dbSEric Biggers #endif /* !CONFIG_FS_ENCRYPTION */ 2765d5d0e8c7SMichael Halcrow 27663dcf5451SChristoph Hellwig /* dir.c */ 276760fd4da3STheodore Ts'o extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *, 2768f7c21177STheodore Ts'o struct file *, 27693dcf5451SChristoph Hellwig struct ext4_dir_entry_2 *, 2770226ba972STao Ma struct buffer_head *, char *, int, 2771226ba972STao Ma unsigned int); 2772226ba972STao Ma #define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \ 2773f7c21177STheodore Ts'o unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \ 2774226ba972STao Ma (de), (bh), (buf), (size), (offset))) 27753dcf5451SChristoph Hellwig extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, 27763dcf5451SChristoph Hellwig __u32 minor_hash, 27772f61830aSTheodore Ts'o struct ext4_dir_entry_2 *dirent, 2778a7550b30SJaegeuk Kim struct fscrypt_str *ent_name); 27793dcf5451SChristoph Hellwig extern void ext4_htree_free_dir_info(struct dir_private_info *p); 2780978fef91STao Ma extern int ext4_find_dest_de(struct inode *dir, struct inode *inode, 2781978fef91STao Ma struct buffer_head *bh, 2782978fef91STao Ma void *buf, int buf_size, 27835b643f9cSTheodore Ts'o struct ext4_filename *fname, 2784978fef91STao Ma struct ext4_dir_entry_2 **dest_de); 2785471fbbeaSDaniel Rosenberg void ext4_insert_dentry(struct inode *dir, struct inode *inode, 2786978fef91STao Ma struct ext4_dir_entry_2 *de, 2787978fef91STao Ma int buf_size, 27885b643f9cSTheodore Ts'o struct ext4_filename *fname); 2789978fef91STao Ma static inline void ext4_update_dx_flag(struct inode *inode) 2790978fef91STao Ma { 2791f902b216SJan Kara if (!ext4_has_feature_dir_index(inode->i_sb) && 2792f902b216SJan Kara ext4_test_inode_flag(inode, EXT4_INODE_INDEX)) { 279348a34311SJan Kara /* ext4_iget() should have caught this... */ 279448a34311SJan Kara WARN_ON_ONCE(ext4_has_feature_metadata_csum(inode->i_sb)); 2795978fef91STao Ma ext4_clear_inode_flag(inode, EXT4_INODE_INDEX); 2796978fef91STao Ma } 279748a34311SJan Kara } 2798d6006186SEric Biggers static const unsigned char ext4_filetype_table[] = { 279965d165d9STao Ma DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK 280065d165d9STao Ma }; 280165d165d9STao Ma 280265d165d9STao Ma static inline unsigned char get_dtype(struct super_block *sb, int filetype) 280365d165d9STao Ma { 2804e2b911c5SDarrick J. Wong if (!ext4_has_feature_filetype(sb) || filetype >= EXT4_FT_MAX) 280565d165d9STao Ma return DT_UNKNOWN; 280665d165d9STao Ma 280765d165d9STao Ma return ext4_filetype_table[filetype]; 280865d165d9STao Ma } 280940b163f1SDarrick J. Wong extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh, 281040b163f1SDarrick J. Wong void *buf, int buf_size); 28113dcf5451SChristoph Hellwig 28123dcf5451SChristoph Hellwig /* fsync.c */ 281302c24a82SJosef Bacik extern int ext4_sync_file(struct file *, loff_t, loff_t, int); 28143dcf5451SChristoph Hellwig 28153dcf5451SChristoph Hellwig /* hash.c */ 2816b886ee3eSGabriel Krisman Bertazi extern int ext4fs_dirhash(const struct inode *dir, const char *name, int len, 2817b886ee3eSGabriel Krisman Bertazi struct dx_hash_info *hinfo); 28183dcf5451SChristoph Hellwig 28193dcf5451SChristoph Hellwig /* ialloc.c */ 28208016e29fSHarshad Shirwadkar extern int ext4_mark_inode_used(struct super_block *sb, int ino); 282114f3db55SChristian Brauner extern struct inode *__ext4_new_inode(struct user_namespace *, handle_t *, 282214f3db55SChristian Brauner struct inode *, umode_t, 28235cb81dabSDmitry Monakhov const struct qstr *qstr, __u32 goal, 28241b917ed8STahsin Erdogan uid_t *owner, __u32 i_flags, 28251b917ed8STahsin Erdogan int handle_type, unsigned int line_no, 28261b917ed8STahsin Erdogan int nblocks); 28271139575aSTheodore Ts'o 28281b917ed8STahsin Erdogan #define ext4_new_inode(handle, dir, mode, qstr, goal, owner, i_flags) \ 282914f3db55SChristian Brauner __ext4_new_inode(&init_user_ns, (handle), (dir), (mode), (qstr), \ 283014f3db55SChristian Brauner (goal), (owner), i_flags, 0, 0, 0) 283114f3db55SChristian Brauner #define ext4_new_inode_start_handle(mnt_userns, dir, mode, qstr, goal, owner, \ 28321139575aSTheodore Ts'o type, nblocks) \ 283314f3db55SChristian Brauner __ext4_new_inode((mnt_userns), NULL, (dir), (mode), (qstr), (goal), (owner), \ 28341b917ed8STahsin Erdogan 0, (type), __LINE__, (nblocks)) 28351139575aSTheodore Ts'o 28361139575aSTheodore Ts'o 28373dcf5451SChristoph Hellwig extern void ext4_free_inode(handle_t *, struct inode *); 28383dcf5451SChristoph Hellwig extern struct inode * ext4_orphan_get(struct super_block *, unsigned long); 28393dcf5451SChristoph Hellwig extern unsigned long ext4_count_free_inodes(struct super_block *); 28403dcf5451SChristoph Hellwig extern unsigned long ext4_count_dirs(struct super_block *); 28413dcf5451SChristoph Hellwig extern void ext4_check_inodes_bitmap(struct super_block *); 284261d08673STheodore Ts'o extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap); 2843bfff6873SLukas Czerner extern int ext4_init_inode_table(struct super_block *sb, 2844bfff6873SLukas Czerner ext4_group_t group, int barrier); 2845813e5727STheodore Ts'o extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate); 28463dcf5451SChristoph Hellwig 28476866d7b3SHarshad Shirwadkar /* fast_commit.c */ 2848ce8c59d1SHarshad Shirwadkar int ext4_fc_info_show(struct seq_file *seq, void *v); 28496866d7b3SHarshad Shirwadkar void ext4_fc_init(struct super_block *sb, journal_t *journal); 2850aa75f4d3SHarshad Shirwadkar void ext4_fc_init_inode(struct inode *inode); 2851a80f7fcfSHarshad Shirwadkar void ext4_fc_track_range(handle_t *handle, struct inode *inode, ext4_lblk_t start, 2852aa75f4d3SHarshad Shirwadkar ext4_lblk_t end); 2853a80f7fcfSHarshad Shirwadkar void __ext4_fc_track_unlink(handle_t *handle, struct inode *inode, 2854a80f7fcfSHarshad Shirwadkar struct dentry *dentry); 2855a80f7fcfSHarshad Shirwadkar void __ext4_fc_track_link(handle_t *handle, struct inode *inode, 2856a80f7fcfSHarshad Shirwadkar struct dentry *dentry); 2857a80f7fcfSHarshad Shirwadkar void ext4_fc_track_unlink(handle_t *handle, struct dentry *dentry); 2858a80f7fcfSHarshad Shirwadkar void ext4_fc_track_link(handle_t *handle, struct dentry *dentry); 28598210bb29SHarshad Shirwadkar void __ext4_fc_track_create(handle_t *handle, struct inode *inode, 28608210bb29SHarshad Shirwadkar struct dentry *dentry); 2861a80f7fcfSHarshad Shirwadkar void ext4_fc_track_create(handle_t *handle, struct dentry *dentry); 2862a80f7fcfSHarshad Shirwadkar void ext4_fc_track_inode(handle_t *handle, struct inode *inode); 2863aa75f4d3SHarshad Shirwadkar void ext4_fc_mark_ineligible(struct super_block *sb, int reason); 2864aa75f4d3SHarshad Shirwadkar void ext4_fc_start_ineligible(struct super_block *sb, int reason); 2865aa75f4d3SHarshad Shirwadkar void ext4_fc_stop_ineligible(struct super_block *sb); 2866aa75f4d3SHarshad Shirwadkar void ext4_fc_start_update(struct inode *inode); 2867aa75f4d3SHarshad Shirwadkar void ext4_fc_stop_update(struct inode *inode); 2868aa75f4d3SHarshad Shirwadkar void ext4_fc_del(struct inode *inode); 28698016e29fSHarshad Shirwadkar bool ext4_fc_replay_check_excluded(struct super_block *sb, ext4_fsblk_t block); 28708016e29fSHarshad Shirwadkar void ext4_fc_replay_cleanup(struct super_block *sb); 2871aa75f4d3SHarshad Shirwadkar int ext4_fc_commit(journal_t *journal, tid_t commit_tid); 2872aa75f4d3SHarshad Shirwadkar int __init ext4_fc_init_dentry_cache(void); 2873aa75f4d3SHarshad Shirwadkar 28743dcf5451SChristoph Hellwig /* mballoc.c */ 2875247dbed8SChristoph Hellwig extern const struct seq_operations ext4_mb_seq_groups_ops; 2876f68f4063SHarshad Shirwadkar extern const struct seq_operations ext4_mb_seq_structs_summary_ops; 28773dcf5451SChristoph Hellwig extern long ext4_mb_stats; 28783dcf5451SChristoph Hellwig extern long ext4_mb_max_to_scan; 2879a6c75eafSHarshad Shirwadkar extern int ext4_seq_mb_stats_show(struct seq_file *seq, void *offset); 28809d99012fSAkira Fujita extern int ext4_mb_init(struct super_block *); 28813dcf5451SChristoph Hellwig extern int ext4_mb_release(struct super_block *); 28823dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, 28833dcf5451SChristoph Hellwig struct ext4_allocation_request *, int *); 28843dcf5451SChristoph Hellwig extern int ext4_mb_reserve_blocks(struct super_block *, int); 288527bc446eSbrookxu extern void ext4_discard_preallocations(struct inode *, unsigned int); 28865dabfc78STheodore Ts'o extern int __init ext4_init_mballoc(void); 28875dabfc78STheodore Ts'o extern void ext4_exit_mballoc(void); 28883d392b26STheodore Ts'o extern ext4_group_t ext4_mb_prefetch(struct super_block *sb, 28893d392b26STheodore Ts'o ext4_group_t group, 28903d392b26STheodore Ts'o unsigned int nr, int *cnt); 28913d392b26STheodore Ts'o extern void ext4_mb_prefetch_fini(struct super_block *sb, ext4_group_t group, 28923d392b26STheodore Ts'o unsigned int nr); 28933d392b26STheodore Ts'o 289444338711STheodore Ts'o extern void ext4_free_blocks(handle_t *handle, struct inode *inode, 2895e6362609STheodore Ts'o struct buffer_head *bh, ext4_fsblk_t block, 2896e6362609STheodore Ts'o unsigned long count, int flags); 289728623c2fSTheodore Ts'o extern int ext4_mb_alloc_groupinfo(struct super_block *sb, 289828623c2fSTheodore Ts'o ext4_group_t ngroups); 2899920313a7SAneesh Kumar K.V extern int ext4_mb_add_groupinfo(struct super_block *sb, 29005f21b0e6SFrederic Bohe ext4_group_t i, struct ext4_group_desc *desc); 2901cc7365dfSYongqiang Yang extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, 29022846e820SAmir Goldstein ext4_fsblk_t block, unsigned long count); 29037360d173SLukas Czerner extern int ext4_trim_fs(struct super_block *, struct fstrim_range *); 2904a0154344SDaeho Jeong extern void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid); 29058016e29fSHarshad Shirwadkar extern void ext4_mb_mark_bb(struct super_block *sb, ext4_fsblk_t block, 29068016e29fSHarshad Shirwadkar int len, int state); 29077360d173SLukas Czerner 29083dcf5451SChristoph Hellwig /* inode.c */ 29098016e29fSHarshad Shirwadkar void ext4_inode_csum_set(struct inode *inode, struct ext4_inode *raw, 29108016e29fSHarshad Shirwadkar struct ext4_inode_info *ei); 2911f348c252STheodore Ts'o int ext4_inode_is_fast_symlink(struct inode *inode); 291210560082STheodore Ts'o struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int); 29131c215028STheodore Ts'o struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int); 29149699d4f9STahsin Erdogan int ext4_bread_batch(struct inode *inode, ext4_lblk_t block, int bh_count, 29159699d4f9STahsin Erdogan bool wait, struct buffer_head **bhs); 2916705965bdSJan Kara int ext4_get_block_unwritten(struct inode *inode, sector_t iblock, 2917f19d5870STao Ma struct buffer_head *bh_result, int create); 29186873fa0dSEric Sandeen int ext4_get_block(struct inode *inode, sector_t iblock, 29196873fa0dSEric Sandeen struct buffer_head *bh_result, int create); 29209c3569b5STao Ma int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, 29219c3569b5STao Ma struct buffer_head *bh, int create); 2922f19d5870STao Ma int ext4_walk_page_buffers(handle_t *handle, 2923f19d5870STao Ma struct buffer_head *head, 2924f19d5870STao Ma unsigned from, 2925f19d5870STao Ma unsigned to, 2926f19d5870STao Ma int *partial, 2927f19d5870STao Ma int (*fn)(handle_t *handle, 2928f19d5870STao Ma struct buffer_head *bh)); 2929f19d5870STao Ma int do_journal_get_write_access(handle_t *handle, 2930f19d5870STao Ma struct buffer_head *bh); 29319c3569b5STao Ma #define FALL_BACK_TO_NONDELALLOC 1 29329c3569b5STao Ma #define CONVERT_INLINE_DATA 2 29333dcf5451SChristoph Hellwig 29348a363970STheodore Ts'o typedef enum { 29358a363970STheodore Ts'o EXT4_IGET_NORMAL = 0, 29368a363970STheodore Ts'o EXT4_IGET_SPECIAL = 0x0001, /* OK to iget a system inode */ 29378a363970STheodore Ts'o EXT4_IGET_HANDLE = 0x0002 /* Inode # is from a handle */ 29388a363970STheodore Ts'o } ext4_iget_flags; 29398a363970STheodore Ts'o 29408a363970STheodore Ts'o extern struct inode *__ext4_iget(struct super_block *sb, unsigned long ino, 29418a363970STheodore Ts'o ext4_iget_flags flags, const char *function, 29428a363970STheodore Ts'o unsigned int line); 29438a363970STheodore Ts'o 29448a363970STheodore Ts'o #define ext4_iget(sb, ino, flags) \ 29458a363970STheodore Ts'o __ext4_iget((sb), (ino), (flags), __func__, __LINE__) 29468a363970STheodore Ts'o 2947a9185b41SChristoph Hellwig extern int ext4_write_inode(struct inode *, struct writeback_control *); 2948549c7297SChristian Brauner extern int ext4_setattr(struct user_namespace *, struct dentry *, 2949549c7297SChristian Brauner struct iattr *); 2950549c7297SChristian Brauner extern int ext4_getattr(struct user_namespace *, const struct path *, 2951549c7297SChristian Brauner struct kstat *, u32, unsigned int); 29520930fcc1SAl Viro extern void ext4_evict_inode(struct inode *); 29530930fcc1SAl Viro extern void ext4_clear_inode(struct inode *); 2954549c7297SChristian Brauner extern int ext4_file_getattr(struct user_namespace *, const struct path *, 2955549c7297SChristian Brauner struct kstat *, u32, unsigned int); 29563dcf5451SChristoph Hellwig extern int ext4_sync_inode(handle_t *, struct inode *); 2957aa385729SChristoph Hellwig extern void ext4_dirty_inode(struct inode *, int); 29583dcf5451SChristoph Hellwig extern int ext4_change_inode_journal_flag(struct inode *, int); 29593dcf5451SChristoph Hellwig extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); 29608016e29fSHarshad Shirwadkar extern int ext4_get_fc_inode_loc(struct super_block *sb, unsigned long ino, 29618016e29fSHarshad Shirwadkar struct ext4_iloc *iloc); 2962a361293fSJan Kara extern int ext4_inode_attach_jinode(struct inode *inode); 296391ef4cafSDuane Griffin extern int ext4_can_truncate(struct inode *inode); 29642c98eb5eSTheodore Ts'o extern int ext4_truncate(struct inode *); 2965430657b6SRoss Zwisler extern int ext4_break_layouts(struct inode *); 2966aeb2817aSAshish Sangwan extern int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length); 2967043546e4SIra Weiny extern void ext4_set_inode_flags(struct inode *, bool init); 2968ccd2506bSTheodore Ts'o extern int ext4_alloc_da_blocks(struct inode *inode); 29693dcf5451SChristoph Hellwig extern void ext4_set_aops(struct inode *inode); 29703dcf5451SChristoph Hellwig extern int ext4_writepage_trans_blocks(struct inode *); 2971f3bd1f3fSMingming Cao extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); 2972a87dd18cSLukas Czerner extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode, 2973a87dd18cSLukas Czerner loff_t lstart, loff_t lend); 2974401b25aaSSouptick Joarder extern vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf); 2975401b25aaSSouptick Joarder extern vm_fault_t ext4_filemap_fault(struct vm_fault *vmf); 2976a9e7f447SDmitry Monakhov extern qsize_t *ext4_get_reserved_space(struct inode *inode); 2977040cb378SLi Xi extern int ext4_get_projid(struct inode *inode, kprojid_t *projid); 2978f456767dSEric Whitney extern void ext4_da_release_space(struct inode *inode, int to_free); 29795f634d06SAneesh Kumar K.V extern void ext4_da_update_reserve_space(struct inode *inode, 29805f634d06SAneesh Kumar K.V int used, int quota_claim); 298153085facSJan Kara extern int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk, 298253085facSJan Kara ext4_fsblk_t pblk, ext4_lblk_t len); 2983dae1e52cSAmir Goldstein 2984dae1e52cSAmir Goldstein /* indirect.c */ 2985dae1e52cSAmir Goldstein extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, 2986dae1e52cSAmir Goldstein struct ext4_map_blocks *map, int flags); 2987fa55a0edSJan Kara extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks); 2988819c4920STheodore Ts'o extern void ext4_ind_truncate(handle_t *, struct inode *inode); 29894f579ae7SLukas Czerner extern int ext4_ind_remove_space(handle_t *handle, struct inode *inode, 29904f579ae7SLukas Czerner ext4_lblk_t start, ext4_lblk_t end); 2991ff9893dcSAmir Goldstein 29923dcf5451SChristoph Hellwig /* ioctl.c */ 29933dcf5451SChristoph Hellwig extern long ext4_ioctl(struct file *, unsigned int, unsigned long); 29943dcf5451SChristoph Hellwig extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long); 29954db5c2e6SMiklos Szeredi int ext4_fileattr_set(struct user_namespace *mnt_userns, 29964db5c2e6SMiklos Szeredi struct dentry *dentry, struct fileattr *fa); 29974db5c2e6SMiklos Szeredi int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa); 29988016e29fSHarshad Shirwadkar extern void ext4_reset_inode_seed(struct inode *inode); 29993dcf5451SChristoph Hellwig 30003dcf5451SChristoph Hellwig /* migrate.c */ 30012a43a878SAneesh Kumar K.V extern int ext4_ext_migrate(struct inode *); 30020d14b098SLukas Czerner extern int ext4_ind_migrate(struct inode *inode); 30033d0518f4SWei Yongjun 30043dcf5451SChristoph Hellwig /* namei.c */ 30058016e29fSHarshad Shirwadkar extern int ext4_init_new_dir(handle_t *handle, struct inode *dir, 30068016e29fSHarshad Shirwadkar struct inode *inode); 3007f036adb3STheodore Ts'o extern int ext4_dirblock_csum_verify(struct inode *inode, 3008f036adb3STheodore Ts'o struct buffer_head *bh); 30093dcf5451SChristoph Hellwig extern int ext4_orphan_add(handle_t *, struct inode *); 30103dcf5451SChristoph Hellwig extern int ext4_orphan_del(handle_t *, struct inode *); 30113dcf5451SChristoph Hellwig extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, 30123dcf5451SChristoph Hellwig __u32 start_minor_hash, __u32 *next_hash); 30135b643f9cSTheodore Ts'o extern int ext4_search_dir(struct buffer_head *bh, 30147335cd3bSTao Ma char *search_buf, 30157335cd3bSTao Ma int buf_size, 30167335cd3bSTao Ma struct inode *dir, 30175b643f9cSTheodore Ts'o struct ext4_filename *fname, 30187335cd3bSTao Ma unsigned int offset, 30197335cd3bSTao Ma struct ext4_dir_entry_2 **res_dir); 30202fe34d29SKyoungho Koo extern int ext4_generic_delete_entry(struct inode *dir, 302105019a9eSTao Ma struct ext4_dir_entry_2 *de_del, 302205019a9eSTao Ma struct buffer_head *bh, 302305019a9eSTao Ma void *entry_buf, 302405019a9eSTao Ma int buf_size, 302505019a9eSTao Ma int csum_size); 3026a7550b30SJaegeuk Kim extern bool ext4_empty_dir(struct inode *inode); 30273dcf5451SChristoph Hellwig 30283dcf5451SChristoph Hellwig /* resize.c */ 30291d0c3924STheodore Ts'o extern void ext4_kvfree_array_rcu(void *to_free); 30303dcf5451SChristoph Hellwig extern int ext4_group_add(struct super_block *sb, 30313dcf5451SChristoph Hellwig struct ext4_new_group_data *input); 30323dcf5451SChristoph Hellwig extern int ext4_group_extend(struct super_block *sb, 30333dcf5451SChristoph Hellwig struct ext4_super_block *es, 30343dcf5451SChristoph Hellwig ext4_fsblk_t n_blocks_count); 303519c5246dSYongqiang Yang extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count); 30363dcf5451SChristoph Hellwig 30373dcf5451SChristoph Hellwig /* super.c */ 3038fb265c9cSTheodore Ts'o extern struct buffer_head *ext4_sb_bread(struct super_block *sb, 3039fb265c9cSTheodore Ts'o sector_t block, int op_flags); 30408394a6abSzhangyi (F) extern struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 30418394a6abSzhangyi (F) sector_t block); 3042fa491b14Szhangyi (F) extern void ext4_read_bh_nowait(struct buffer_head *bh, int op_flags, 3043fa491b14Szhangyi (F) bh_end_io_t *end_io); 3044fa491b14Szhangyi (F) extern int ext4_read_bh(struct buffer_head *bh, int op_flags, 3045fa491b14Szhangyi (F) bh_end_io_t *end_io); 3046fa491b14Szhangyi (F) extern int ext4_read_bh_lock(struct buffer_head *bh, int op_flags, bool wait); 30475df1d412Szhangyi (F) extern void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block); 3048ebd173beSTheodore Ts'o extern int ext4_seq_options_show(struct seq_file *seq, void *offset); 3049952fc18eSTheodore Ts'o extern int ext4_calculate_overhead(struct super_block *sb); 305006db49e6STheodore Ts'o extern void ext4_superblock_csum_set(struct super_block *sb); 3051117fff10STheodore Ts'o extern int ext4_alloc_flex_bg_array(struct super_block *sb, 3052117fff10STheodore Ts'o ext4_group_t ngroup); 3053722887ddSTheodore Ts'o extern const char *ext4_decode_error(struct super_block *sb, int errno, 3054722887ddSTheodore Ts'o char nbuf[16]); 3055db79e6d1SWang Shilong extern void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 3056db79e6d1SWang Shilong ext4_group_t block_group, 3057db79e6d1SWang Shilong unsigned int flags); 3058e7c96e8eSJoe Perches 3059014c9caaSJan Kara extern __printf(7, 8) 3060014c9caaSJan Kara void __ext4_error(struct super_block *, const char *, unsigned int, bool, 3061014c9caaSJan Kara int, __u64, const char *, ...); 306254d3adbcSTheodore Ts'o extern __printf(6, 7) 306354d3adbcSTheodore Ts'o void __ext4_error_inode(struct inode *, const char *, unsigned int, 306454d3adbcSTheodore Ts'o ext4_fsblk_t, int, const char *, ...); 3065b9075fa9SJoe Perches extern __printf(5, 6) 3066e7c96e8eSJoe Perches void __ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t, 3067b9075fa9SJoe Perches const char *, ...); 3068c398eda0STheodore Ts'o extern void __ext4_std_error(struct super_block *, const char *, 3069c398eda0STheodore Ts'o unsigned int, int); 3070b9075fa9SJoe Perches extern __printf(4, 5) 3071b9075fa9SJoe Perches void __ext4_warning(struct super_block *, const char *, unsigned int, 3072b9075fa9SJoe Perches const char *, ...); 3073b03a2f7eSAndreas Dilger extern __printf(4, 5) 3074b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 3075b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...); 3076b9075fa9SJoe Perches extern __printf(3, 4) 3077e7c96e8eSJoe Perches void __ext4_msg(struct super_block *, const char *, const char *, ...); 3078c5e06d10SJohann Lombardi extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp, 3079c5e06d10SJohann Lombardi const char *, unsigned int, const char *); 3080b9075fa9SJoe Perches extern __printf(7, 8) 3081b9075fa9SJoe Perches void __ext4_grp_locked_error(const char *, unsigned int, 3082b9075fa9SJoe Perches struct super_block *, ext4_group_t, 3083b9075fa9SJoe Perches unsigned long, ext4_fsblk_t, 3084b9075fa9SJoe Perches const char *, ...); 3085e7c96e8eSJoe Perches 3086b03a2f7eSAndreas Dilger #define EXT4_ERROR_INODE(inode, fmt, a...) \ 3087b03a2f7eSAndreas Dilger ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a) 3088b03a2f7eSAndreas Dilger 308954d3adbcSTheodore Ts'o #define EXT4_ERROR_INODE_ERR(inode, err, fmt, a...) \ 309054d3adbcSTheodore Ts'o __ext4_error_inode((inode), __func__, __LINE__, 0, (err), (fmt), ## a) 309154d3adbcSTheodore Ts'o 309254d3adbcSTheodore Ts'o #define ext4_error_inode_block(inode, block, err, fmt, a...) \ 309354d3adbcSTheodore Ts'o __ext4_error_inode((inode), __func__, __LINE__, (block), (err), \ 309454d3adbcSTheodore Ts'o (fmt), ## a) 3095b03a2f7eSAndreas Dilger 3096b03a2f7eSAndreas Dilger #define EXT4_ERROR_FILE(file, block, fmt, a...) \ 3097b03a2f7eSAndreas Dilger ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a) 3098b03a2f7eSAndreas Dilger 3099014c9caaSJan Kara #define ext4_abort(sb, err, fmt, a...) \ 3100014c9caaSJan Kara __ext4_error((sb), __func__, __LINE__, true, (err), 0, (fmt), ## a) 3101014c9caaSJan Kara 3102e7c96e8eSJoe Perches #ifdef CONFIG_PRINTK 3103e7c96e8eSJoe Perches 3104e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 310554d3adbcSTheodore Ts'o __ext4_error_inode(inode, func, line, block, 0, fmt, ##__VA_ARGS__) 310654d3adbcSTheodore Ts'o #define ext4_error_inode_err(inode, func, line, block, err, fmt, ...) \ 310754d3adbcSTheodore Ts'o __ext4_error_inode((inode), (func), (line), (block), \ 310854d3adbcSTheodore Ts'o (err), (fmt), ##__VA_ARGS__) 3109e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 3110e7c96e8eSJoe Perches __ext4_error_file(file, func, line, block, fmt, ##__VA_ARGS__) 3111e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 3112014c9caaSJan Kara __ext4_error((sb), __func__, __LINE__, false, 0, 0, (fmt), \ 3113014c9caaSJan Kara ##__VA_ARGS__) 311454d3adbcSTheodore Ts'o #define ext4_error_err(sb, err, fmt, ...) \ 3115014c9caaSJan Kara __ext4_error((sb), __func__, __LINE__, false, (err), 0, (fmt), \ 3116014c9caaSJan Kara ##__VA_ARGS__) 3117e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 3118e7c96e8eSJoe Perches __ext4_warning(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 3119b03a2f7eSAndreas Dilger #define ext4_warning_inode(inode, fmt, ...) \ 3120b03a2f7eSAndreas Dilger __ext4_warning_inode(inode, __func__, __LINE__, fmt, ##__VA_ARGS__) 3121e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 3122e7c96e8eSJoe Perches __ext4_msg(sb, level, fmt, ##__VA_ARGS__) 3123e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 3124e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, __func__, __LINE__, msg) 3125e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 3126e7c96e8eSJoe Perches __ext4_grp_locked_error(__func__, __LINE__, sb, grp, ino, block, \ 3127e7c96e8eSJoe Perches fmt, ##__VA_ARGS__) 3128e7c96e8eSJoe Perches 3129e7c96e8eSJoe Perches #else 3130e7c96e8eSJoe Perches 3131e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 3132e7c96e8eSJoe Perches do { \ 3133e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 313454d3adbcSTheodore Ts'o __ext4_error_inode(inode, "", 0, block, 0, " "); \ 313554d3adbcSTheodore Ts'o } while (0) 313654d3adbcSTheodore Ts'o #define ext4_error_inode_err(inode, func, line, block, err, fmt, ...) \ 313754d3adbcSTheodore Ts'o do { \ 313854d3adbcSTheodore Ts'o no_printk(fmt, ##__VA_ARGS__); \ 313954d3adbcSTheodore Ts'o __ext4_error_inode(inode, "", 0, block, err, " "); \ 3140e7c96e8eSJoe Perches } while (0) 3141e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 3142e7c96e8eSJoe Perches do { \ 3143e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 3144e7c96e8eSJoe Perches __ext4_error_file(file, "", 0, block, " "); \ 3145e7c96e8eSJoe Perches } while (0) 3146e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 3147e7c96e8eSJoe Perches do { \ 3148e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 3149014c9caaSJan Kara __ext4_error(sb, "", 0, false, 0, 0, " "); \ 3150e7c96e8eSJoe Perches } while (0) 315154d3adbcSTheodore Ts'o #define ext4_error_err(sb, err, fmt, ...) \ 3152e7c96e8eSJoe Perches do { \ 3153e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 3154014c9caaSJan Kara __ext4_error(sb, "", 0, false, err, 0, " "); \ 3155e7c96e8eSJoe Perches } while (0) 3156e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 3157e7c96e8eSJoe Perches do { \ 3158e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 3159e7c96e8eSJoe Perches __ext4_warning(sb, "", 0, " "); \ 3160e7c96e8eSJoe Perches } while (0) 3161b03a2f7eSAndreas Dilger #define ext4_warning_inode(inode, fmt, ...) \ 3162b03a2f7eSAndreas Dilger do { \ 3163b03a2f7eSAndreas Dilger no_printk(fmt, ##__VA_ARGS__); \ 3164b03a2f7eSAndreas Dilger __ext4_warning_inode(inode, "", 0, " "); \ 3165b03a2f7eSAndreas Dilger } while (0) 3166e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 3167e7c96e8eSJoe Perches do { \ 3168e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 3169e7c96e8eSJoe Perches __ext4_msg(sb, "", " "); \ 3170e7c96e8eSJoe Perches } while (0) 3171e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 3172e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, "", 0, "") 3173e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 3174e7c96e8eSJoe Perches do { \ 3175e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 3176e7c96e8eSJoe Perches __ext4_grp_locked_error("", 0, sb, grp, ino, block, " "); \ 3177e7c96e8eSJoe Perches } while (0) 3178e7c96e8eSJoe Perches 3179e7c96e8eSJoe Perches #endif 3180e7c96e8eSJoe Perches 31813dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 31823dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 31833dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 31843dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 31853dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_table(struct super_block *sb, 31863dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 3187021b65bbSTheodore Ts'o extern __u32 ext4_free_group_clusters(struct super_block *sb, 3188560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 3189560671a0SAneesh Kumar K.V extern __u32 ext4_free_inodes_count(struct super_block *sb, 3190560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 3191560671a0SAneesh Kumar K.V extern __u32 ext4_used_dirs_count(struct super_block *sb, 3192560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 3193560671a0SAneesh Kumar K.V extern __u32 ext4_itable_unused_count(struct super_block *sb, 3194560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 31953dcf5451SChristoph Hellwig extern void ext4_block_bitmap_set(struct super_block *sb, 31963dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 31973dcf5451SChristoph Hellwig extern void ext4_inode_bitmap_set(struct super_block *sb, 31983dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 31993dcf5451SChristoph Hellwig extern void ext4_inode_table_set(struct super_block *sb, 32003dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 3201021b65bbSTheodore Ts'o extern void ext4_free_group_clusters_set(struct super_block *sb, 3202021b65bbSTheodore Ts'o struct ext4_group_desc *bg, 3203021b65bbSTheodore Ts'o __u32 count); 3204560671a0SAneesh Kumar K.V extern void ext4_free_inodes_set(struct super_block *sb, 3205560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 3206560671a0SAneesh Kumar K.V extern void ext4_used_dirs_set(struct super_block *sb, 3207560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 3208560671a0SAneesh Kumar K.V extern void ext4_itable_unused_set(struct super_block *sb, 3209560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 3210feb0ab32SDarrick J. Wong extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group, 3211bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 3212feb0ab32SDarrick J. Wong extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group, 3213bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 32147f511862STheodore Ts'o extern int ext4_register_li_request(struct super_block *sb, 32157f511862STheodore Ts'o ext4_group_t first_not_zeroed); 32163dcf5451SChristoph Hellwig 32179aa5d32bSDmitry Monakhov static inline int ext4_has_metadata_csum(struct super_block *sb) 32189aa5d32bSDmitry Monakhov { 3219e2b911c5SDarrick J. Wong WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) && 32209aa5d32bSDmitry Monakhov !EXT4_SB(sb)->s_chksum_driver); 32219aa5d32bSDmitry Monakhov 3222dec214d0STahsin Erdogan return ext4_has_feature_metadata_csum(sb) && 3223dec214d0STahsin Erdogan (EXT4_SB(sb)->s_chksum_driver != NULL); 32249aa5d32bSDmitry Monakhov } 3225dec214d0STahsin Erdogan 3226dec214d0STahsin Erdogan static inline int ext4_has_group_desc_csum(struct super_block *sb) 3227dec214d0STahsin Erdogan { 3228dec214d0STahsin Erdogan return ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb); 3229dec214d0STahsin Erdogan } 3230dec214d0STahsin Erdogan 323181e8c3c5SPetr Malat #define ext4_read_incompat_64bit_val(es, name) \ 323281e8c3c5SPetr Malat (((es)->s_feature_incompat & cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT) \ 323381e8c3c5SPetr Malat ? (ext4_fsblk_t)le32_to_cpu(es->name##_hi) << 32 : 0) | \ 323481e8c3c5SPetr Malat le32_to_cpu(es->name##_lo)) 323581e8c3c5SPetr Malat 32363dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) 32373dcf5451SChristoph Hellwig { 323881e8c3c5SPetr Malat return ext4_read_incompat_64bit_val(es, s_blocks_count); 32393dcf5451SChristoph Hellwig } 32403dcf5451SChristoph Hellwig 32413dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) 32423dcf5451SChristoph Hellwig { 324381e8c3c5SPetr Malat return ext4_read_incompat_64bit_val(es, s_r_blocks_count); 32443dcf5451SChristoph Hellwig } 32453dcf5451SChristoph Hellwig 32463dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) 32473dcf5451SChristoph Hellwig { 324881e8c3c5SPetr Malat return ext4_read_incompat_64bit_val(es, s_free_blocks_count); 32493dcf5451SChristoph Hellwig } 32503dcf5451SChristoph Hellwig 32513dcf5451SChristoph Hellwig static inline void ext4_blocks_count_set(struct ext4_super_block *es, 32523dcf5451SChristoph Hellwig ext4_fsblk_t blk) 32533dcf5451SChristoph Hellwig { 32543dcf5451SChristoph Hellwig es->s_blocks_count_lo = cpu_to_le32((u32)blk); 32553dcf5451SChristoph Hellwig es->s_blocks_count_hi = cpu_to_le32(blk >> 32); 32563dcf5451SChristoph Hellwig } 32573dcf5451SChristoph Hellwig 32583dcf5451SChristoph Hellwig static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, 32593dcf5451SChristoph Hellwig ext4_fsblk_t blk) 32603dcf5451SChristoph Hellwig { 32613dcf5451SChristoph Hellwig es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); 32623dcf5451SChristoph Hellwig es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); 32633dcf5451SChristoph Hellwig } 32643dcf5451SChristoph Hellwig 32653dcf5451SChristoph Hellwig static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, 32663dcf5451SChristoph Hellwig ext4_fsblk_t blk) 32673dcf5451SChristoph Hellwig { 32683dcf5451SChristoph Hellwig es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); 32693dcf5451SChristoph Hellwig es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); 32703dcf5451SChristoph Hellwig } 32713dcf5451SChristoph Hellwig 3272e08ac99fSArtem Blagodarenko static inline loff_t ext4_isize(struct super_block *sb, 3273e08ac99fSArtem Blagodarenko struct ext4_inode *raw_inode) 32743dcf5451SChristoph Hellwig { 3275e08ac99fSArtem Blagodarenko if (ext4_has_feature_largedir(sb) || 3276e08ac99fSArtem Blagodarenko S_ISREG(le16_to_cpu(raw_inode->i_mode))) 32773dcf5451SChristoph Hellwig return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | 32783dcf5451SChristoph Hellwig le32_to_cpu(raw_inode->i_size_lo); 3279e08ac99fSArtem Blagodarenko 328006a279d6STheodore Ts'o return (loff_t) le32_to_cpu(raw_inode->i_size_lo); 32813dcf5451SChristoph Hellwig } 32823dcf5451SChristoph Hellwig 32833dcf5451SChristoph Hellwig static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) 32843dcf5451SChristoph Hellwig { 32853dcf5451SChristoph Hellwig raw_inode->i_size_lo = cpu_to_le32(i_size); 32863dcf5451SChristoph Hellwig raw_inode->i_size_high = cpu_to_le32(i_size >> 32); 32873dcf5451SChristoph Hellwig } 32883dcf5451SChristoph Hellwig 32893dcf5451SChristoph Hellwig static inline 32903dcf5451SChristoph Hellwig struct ext4_group_info *ext4_get_group_info(struct super_block *sb, 32913dcf5451SChristoph Hellwig ext4_group_t group) 32923dcf5451SChristoph Hellwig { 3293df3da4eaSSuraj Jitindar Singh struct ext4_group_info **grp_info; 32943dcf5451SChristoph Hellwig long indexv, indexh; 32952f2e09ebSTheodore Ts'o BUG_ON(group >= EXT4_SB(sb)->s_groups_count); 32963dcf5451SChristoph Hellwig indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); 32973dcf5451SChristoph Hellwig indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); 3298df3da4eaSSuraj Jitindar Singh grp_info = sbi_array_rcu_deref(EXT4_SB(sb), s_group_info, indexv); 3299df3da4eaSSuraj Jitindar Singh return grp_info[indexh]; 33003dcf5451SChristoph Hellwig } 33013dcf5451SChristoph Hellwig 33028df9675fSTheodore Ts'o /* 33038df9675fSTheodore Ts'o * Reading s_groups_count requires using smp_rmb() afterwards. See 33048df9675fSTheodore Ts'o * the locking protocol documented in the comments of ext4_group_add() 33058df9675fSTheodore Ts'o * in resize.c 33068df9675fSTheodore Ts'o */ 33078df9675fSTheodore Ts'o static inline ext4_group_t ext4_get_groups_count(struct super_block *sb) 33088df9675fSTheodore Ts'o { 33098df9675fSTheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 33108df9675fSTheodore Ts'o 33118df9675fSTheodore Ts'o smp_rmb(); 33128df9675fSTheodore Ts'o return ngroups; 33138df9675fSTheodore Ts'o } 33143dcf5451SChristoph Hellwig 3315772cb7c8SJose R. Santos static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, 3316772cb7c8SJose R. Santos ext4_group_t block_group) 3317772cb7c8SJose R. Santos { 3318772cb7c8SJose R. Santos return block_group >> sbi->s_log_groups_per_flex; 3319772cb7c8SJose R. Santos } 3320772cb7c8SJose R. Santos 3321772cb7c8SJose R. Santos static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi) 3322772cb7c8SJose R. Santos { 3323772cb7c8SJose R. Santos return 1 << sbi->s_log_groups_per_flex; 3324772cb7c8SJose R. Santos } 3325772cb7c8SJose R. Santos 33263dcf5451SChristoph Hellwig #define ext4_std_error(sb, errno) \ 33273dcf5451SChristoph Hellwig do { \ 33283dcf5451SChristoph Hellwig if ((errno)) \ 3329c398eda0STheodore Ts'o __ext4_std_error((sb), __func__, __LINE__, (errno)); \ 33303dcf5451SChristoph Hellwig } while (0) 33313dcf5451SChristoph Hellwig 3332a30d542aSAneesh Kumar K.V #ifdef CONFIG_SMP 3333df55c99dSTheodore Ts'o /* Each CPU can accumulate percpu_counter_batch clusters in their local 3334df55c99dSTheodore Ts'o * counters. So we need to make sure we have free clusters more 3335179f7ebfSEric Dumazet * than percpu_counter_batch * nr_cpu_ids. Also add a window of 4 times. 3336a30d542aSAneesh Kumar K.V */ 3337df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids)) 3338a30d542aSAneesh Kumar K.V #else 3339df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK 0 3340a30d542aSAneesh Kumar K.V #endif 3341a30d542aSAneesh Kumar K.V 334290e775b7SJan Kara /* Update i_disksize. Requires i_mutex to avoid races with truncate */ 3343cf17fea6SAneesh Kumar K.V static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize) 3344cf17fea6SAneesh Kumar K.V { 334590e775b7SJan Kara WARN_ON_ONCE(S_ISREG(inode->i_mode) && 33465955102cSAl Viro !inode_is_locked(inode)); 3347cf17fea6SAneesh Kumar K.V down_write(&EXT4_I(inode)->i_data_sem); 3348cf17fea6SAneesh Kumar K.V if (newsize > EXT4_I(inode)->i_disksize) 334935df4299SQian Cai WRITE_ONCE(EXT4_I(inode)->i_disksize, newsize); 3350cf17fea6SAneesh Kumar K.V up_write(&EXT4_I(inode)->i_data_sem); 335190e775b7SJan Kara } 335290e775b7SJan Kara 33534631dbf6SDmitry Monakhov /* Update i_size, i_disksize. Requires i_mutex to avoid races with truncate */ 33544631dbf6SDmitry Monakhov static inline int ext4_update_inode_size(struct inode *inode, loff_t newsize) 33554631dbf6SDmitry Monakhov { 33564631dbf6SDmitry Monakhov int changed = 0; 33574631dbf6SDmitry Monakhov 33584631dbf6SDmitry Monakhov if (newsize > inode->i_size) { 33594631dbf6SDmitry Monakhov i_size_write(inode, newsize); 33604631dbf6SDmitry Monakhov changed = 1; 33614631dbf6SDmitry Monakhov } 33624631dbf6SDmitry Monakhov if (newsize > EXT4_I(inode)->i_disksize) { 33634631dbf6SDmitry Monakhov ext4_update_i_disksize(inode, newsize); 33644631dbf6SDmitry Monakhov changed |= 2; 33654631dbf6SDmitry Monakhov } 33664631dbf6SDmitry Monakhov return changed; 33674631dbf6SDmitry Monakhov } 33684631dbf6SDmitry Monakhov 336901127848SJan Kara int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset, 337001127848SJan Kara loff_t len); 337101127848SJan Kara 33725d1b1b3fSAneesh Kumar K.V struct ext4_group_info { 33735d1b1b3fSAneesh Kumar K.V unsigned long bb_state; 3374addd752cSChunguang Xu #ifdef AGGRESSIVE_CHECK 3375addd752cSChunguang Xu unsigned long bb_check_counter; 3376addd752cSChunguang Xu #endif 33775d1b1b3fSAneesh Kumar K.V struct rb_root bb_free_root; 3378a36b4498SEric Sandeen ext4_grpblk_t bb_first_free; /* first free block */ 3379a36b4498SEric Sandeen ext4_grpblk_t bb_free; /* total free blocks */ 3380a36b4498SEric Sandeen ext4_grpblk_t bb_fragments; /* nr of freespace fragments */ 33818a57d9d6SCurt Wohlgemuth ext4_grpblk_t bb_largest_free_order;/* order of largest frag in BG */ 3382196e402aSHarshad Shirwadkar ext4_group_t bb_group; /* Group number */ 33835d1b1b3fSAneesh Kumar K.V struct list_head bb_prealloc_list; 33845d1b1b3fSAneesh Kumar K.V #ifdef DOUBLE_CHECK 33855d1b1b3fSAneesh Kumar K.V void *bb_bitmap; 33865d1b1b3fSAneesh Kumar K.V #endif 33875d1b1b3fSAneesh Kumar K.V struct rw_semaphore alloc_sem; 3388196e402aSHarshad Shirwadkar struct rb_node bb_avg_fragment_size_rb; 3389196e402aSHarshad Shirwadkar struct list_head bb_largest_free_order_node; 3390a36b4498SEric Sandeen ext4_grpblk_t bb_counters[]; /* Nr of free power-of-two-block 3391a36b4498SEric Sandeen * regions, index is order. 3392a36b4498SEric Sandeen * bb_counters[3] = 5 means 3393a36b4498SEric Sandeen * 5 free 8-block regions. */ 33945d1b1b3fSAneesh Kumar K.V }; 33955d1b1b3fSAneesh Kumar K.V 33965d1b1b3fSAneesh Kumar K.V #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 33973d56b8d2STao Ma #define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1 3398163a203dSDarrick J. Wong #define EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT 2 339987a39389SDarrick J. Wong #define EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT 3 3400db79e6d1SWang Shilong #define EXT4_GROUP_INFO_BBITMAP_CORRUPT \ 3401db79e6d1SWang Shilong (1 << EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT) 3402db79e6d1SWang Shilong #define EXT4_GROUP_INFO_IBITMAP_CORRUPT \ 3403db79e6d1SWang Shilong (1 << EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT) 3404cfd73237SAlex Zhuravlev #define EXT4_GROUP_INFO_BBITMAP_READ_BIT 4 34055d1b1b3fSAneesh Kumar K.V 34065d1b1b3fSAneesh Kumar K.V #define EXT4_MB_GRP_NEED_INIT(grp) \ 34075d1b1b3fSAneesh Kumar K.V (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) 3408163a203dSDarrick J. Wong #define EXT4_MB_GRP_BBITMAP_CORRUPT(grp) \ 3409163a203dSDarrick J. Wong (test_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 341087a39389SDarrick J. Wong #define EXT4_MB_GRP_IBITMAP_CORRUPT(grp) \ 341187a39389SDarrick J. Wong (test_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 34125d1b1b3fSAneesh Kumar K.V 34133d56b8d2STao Ma #define EXT4_MB_GRP_WAS_TRIMMED(grp) \ 34143d56b8d2STao Ma (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 34153d56b8d2STao Ma #define EXT4_MB_GRP_SET_TRIMMED(grp) \ 34163d56b8d2STao Ma (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 34173d56b8d2STao Ma #define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \ 34183d56b8d2STao Ma (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 3419cfd73237SAlex Zhuravlev #define EXT4_MB_GRP_TEST_AND_SET_READ(grp) \ 3420cfd73237SAlex Zhuravlev (test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_READ_BIT, &((grp)->bb_state))) 34213d56b8d2STao Ma 342250797481STheodore Ts'o #define EXT4_MAX_CONTENTION 8 342350797481STheodore Ts'o #define EXT4_CONTENTION_THRESHOLD 2 342450797481STheodore Ts'o 3425955ce5f5SAneesh Kumar K.V static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb, 3426955ce5f5SAneesh Kumar K.V ext4_group_t group) 3427955ce5f5SAneesh Kumar K.V { 3428955ce5f5SAneesh Kumar K.V return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group); 3429955ce5f5SAneesh Kumar K.V } 3430955ce5f5SAneesh Kumar K.V 343150797481STheodore Ts'o /* 343250797481STheodore Ts'o * Returns true if the filesystem is busy enough that attempts to 343350797481STheodore Ts'o * access the block group locks has run into contention. 343450797481STheodore Ts'o */ 343550797481STheodore Ts'o static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi) 343650797481STheodore Ts'o { 343750797481STheodore Ts'o return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD); 343850797481STheodore Ts'o } 343950797481STheodore Ts'o 34405d1b1b3fSAneesh Kumar K.V static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group) 34415d1b1b3fSAneesh Kumar K.V { 344250797481STheodore Ts'o spinlock_t *lock = ext4_group_lock_ptr(sb, group); 344350797481STheodore Ts'o if (spin_trylock(lock)) 344450797481STheodore Ts'o /* 344550797481STheodore Ts'o * We're able to grab the lock right away, so drop the 344650797481STheodore Ts'o * lock contention counter. 344750797481STheodore Ts'o */ 344850797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0); 344950797481STheodore Ts'o else { 345050797481STheodore Ts'o /* 345150797481STheodore Ts'o * The lock is busy, so bump the contention counter, 345250797481STheodore Ts'o * and then wait on the spin lock. 345350797481STheodore Ts'o */ 345450797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1, 345550797481STheodore Ts'o EXT4_MAX_CONTENTION); 345650797481STheodore Ts'o spin_lock(lock); 345750797481STheodore Ts'o } 34585d1b1b3fSAneesh Kumar K.V } 34595d1b1b3fSAneesh Kumar K.V 34605d1b1b3fSAneesh Kumar K.V static inline void ext4_unlock_group(struct super_block *sb, 34615d1b1b3fSAneesh Kumar K.V ext4_group_t group) 34625d1b1b3fSAneesh Kumar K.V { 3463955ce5f5SAneesh Kumar K.V spin_unlock(ext4_group_lock_ptr(sb, group)); 34645d1b1b3fSAneesh Kumar K.V } 34655d1b1b3fSAneesh Kumar K.V 3466f177ee08SRoman Anufriev #ifdef CONFIG_QUOTA 3467f177ee08SRoman Anufriev static inline bool ext4_quota_capable(struct super_block *sb) 3468f177ee08SRoman Anufriev { 3469f177ee08SRoman Anufriev return (test_opt(sb, QUOTA) || ext4_has_feature_quota(sb)); 3470f177ee08SRoman Anufriev } 3471f177ee08SRoman Anufriev 3472f177ee08SRoman Anufriev static inline bool ext4_is_quota_journalled(struct super_block *sb) 3473f177ee08SRoman Anufriev { 3474f177ee08SRoman Anufriev struct ext4_sb_info *sbi = EXT4_SB(sb); 3475f177ee08SRoman Anufriev 3476f177ee08SRoman Anufriev return (ext4_has_feature_quota(sb) || 3477f177ee08SRoman Anufriev sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]); 3478f177ee08SRoman Anufriev } 3479f177ee08SRoman Anufriev #endif 3480f177ee08SRoman Anufriev 34813dcf5451SChristoph Hellwig /* 34821f7d1e77STheodore Ts'o * Block validity checking 34831f7d1e77STheodore Ts'o */ 34841f7d1e77STheodore Ts'o #define ext4_check_indirect_blockref(inode, bh) \ 34851f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 34861f7d1e77STheodore Ts'o (__le32 *)(bh)->b_data, \ 34871f7d1e77STheodore Ts'o EXT4_ADDR_PER_BLOCK((inode)->i_sb)) 34881f7d1e77STheodore Ts'o 34891f7d1e77STheodore Ts'o #define ext4_ind_check_inode(inode) \ 34901f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 34911f7d1e77STheodore Ts'o EXT4_I(inode)->i_data, \ 34921f7d1e77STheodore Ts'o EXT4_NDIR_BLOCKS) 34931f7d1e77STheodore Ts'o 34941f7d1e77STheodore Ts'o /* 34953dcf5451SChristoph Hellwig * Inodes and files operations 34963dcf5451SChristoph Hellwig */ 34973dcf5451SChristoph Hellwig 34983dcf5451SChristoph Hellwig /* dir.c */ 34993dcf5451SChristoph Hellwig extern const struct file_operations ext4_dir_operations; 35003dcf5451SChristoph Hellwig 35013dcf5451SChristoph Hellwig /* file.c */ 35023dcf5451SChristoph Hellwig extern const struct inode_operations ext4_file_inode_operations; 35033dcf5451SChristoph Hellwig extern const struct file_operations ext4_file_operations; 3504e0d10bfaSToshiyuki Okajima extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin); 35053dcf5451SChristoph Hellwig 350695eaefbdSTheodore Ts'o /* inline.c */ 350795eaefbdSTheodore Ts'o extern int ext4_get_max_inline_size(struct inode *inode); 350895eaefbdSTheodore Ts'o extern int ext4_find_inline_data_nolock(struct inode *inode); 350995eaefbdSTheodore Ts'o extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, 351095eaefbdSTheodore Ts'o unsigned int len); 351195eaefbdSTheodore Ts'o extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); 351295eaefbdSTheodore Ts'o 351395eaefbdSTheodore Ts'o extern int ext4_readpage_inline(struct inode *inode, struct page *page); 351495eaefbdSTheodore Ts'o extern int ext4_try_to_write_inline_data(struct address_space *mapping, 351595eaefbdSTheodore Ts'o struct inode *inode, 351695eaefbdSTheodore Ts'o loff_t pos, unsigned len, 351795eaefbdSTheodore Ts'o unsigned flags, 351895eaefbdSTheodore Ts'o struct page **pagep); 351995eaefbdSTheodore Ts'o extern int ext4_write_inline_data_end(struct inode *inode, 352095eaefbdSTheodore Ts'o loff_t pos, unsigned len, 352195eaefbdSTheodore Ts'o unsigned copied, 352295eaefbdSTheodore Ts'o struct page *page); 352395eaefbdSTheodore Ts'o extern struct buffer_head * 352495eaefbdSTheodore Ts'o ext4_journalled_write_inline_data(struct inode *inode, 352595eaefbdSTheodore Ts'o unsigned len, 352695eaefbdSTheodore Ts'o struct page *page); 352795eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_begin(struct address_space *mapping, 352895eaefbdSTheodore Ts'o struct inode *inode, 352995eaefbdSTheodore Ts'o loff_t pos, unsigned len, 353095eaefbdSTheodore Ts'o unsigned flags, 353195eaefbdSTheodore Ts'o struct page **pagep, 353295eaefbdSTheodore Ts'o void **fsdata); 353395eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, 353495eaefbdSTheodore Ts'o unsigned len, unsigned copied, 353595eaefbdSTheodore Ts'o struct page *page); 35365b643f9cSTheodore Ts'o extern int ext4_try_add_inline_entry(handle_t *handle, 35375b643f9cSTheodore Ts'o struct ext4_filename *fname, 353856a04915STheodore Ts'o struct inode *dir, struct inode *inode); 353995eaefbdSTheodore Ts'o extern int ext4_try_create_inline_dir(handle_t *handle, 354095eaefbdSTheodore Ts'o struct inode *parent, 354195eaefbdSTheodore Ts'o struct inode *inode); 354295eaefbdSTheodore Ts'o extern int ext4_read_inline_dir(struct file *filp, 3543725bebb2SAl Viro struct dir_context *ctx, 354495eaefbdSTheodore Ts'o int *has_inline_data); 35457633b08bSTheodore Ts'o extern int ext4_inlinedir_to_tree(struct file *dir_file, 35468af0f082STao Ma struct inode *dir, ext4_lblk_t block, 35478af0f082STao Ma struct dx_hash_info *hinfo, 35488af0f082STao Ma __u32 start_hash, __u32 start_minor_hash, 35498af0f082STao Ma int *has_inline_data); 355095eaefbdSTheodore Ts'o extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, 35515b643f9cSTheodore Ts'o struct ext4_filename *fname, 355295eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **res_dir, 355395eaefbdSTheodore Ts'o int *has_inline_data); 355495eaefbdSTheodore Ts'o extern int ext4_delete_inline_entry(handle_t *handle, 355595eaefbdSTheodore Ts'o struct inode *dir, 355695eaefbdSTheodore Ts'o struct ext4_dir_entry_2 *de_del, 355795eaefbdSTheodore Ts'o struct buffer_head *bh, 355895eaefbdSTheodore Ts'o int *has_inline_data); 3559a7550b30SJaegeuk Kim extern bool empty_inline_dir(struct inode *dir, int *has_inline_data); 356095eaefbdSTheodore Ts'o extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, 356195eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **parent_de, 356295eaefbdSTheodore Ts'o int *retval); 356395eaefbdSTheodore Ts'o extern int ext4_inline_data_fiemap(struct inode *inode, 356495eaefbdSTheodore Ts'o struct fiemap_extent_info *fieinfo, 3565d952d69eSDmitry Monakhov int *has_inline, __u64 start, __u64 len); 35667046ae35SAndreas Gruenbacher 35677046ae35SAndreas Gruenbacher struct iomap; 35687046ae35SAndreas Gruenbacher extern int ext4_inline_data_iomap(struct inode *inode, struct iomap *iomap); 35697046ae35SAndreas Gruenbacher 357001daf945STheodore Ts'o extern int ext4_inline_data_truncate(struct inode *inode, int *has_inline); 357195eaefbdSTheodore Ts'o 357295eaefbdSTheodore Ts'o extern int ext4_convert_inline_data(struct inode *inode); 357395eaefbdSTheodore Ts'o 357483447ccbSZheng Liu static inline int ext4_has_inline_data(struct inode *inode) 357583447ccbSZheng Liu { 357683447ccbSZheng Liu return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) && 357783447ccbSZheng Liu EXT4_I(inode)->i_inline_off; 357883447ccbSZheng Liu } 357983447ccbSZheng Liu 35803dcf5451SChristoph Hellwig /* namei.c */ 35813dcf5451SChristoph Hellwig extern const struct inode_operations ext4_dir_inode_operations; 35823dcf5451SChristoph Hellwig extern const struct inode_operations ext4_special_inode_operations; 3583596397b7STheodore Ts'o extern struct dentry *ext4_get_parent(struct dentry *child); 3584a774f9c2STao Ma extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode, 3585a774f9c2STao Ma struct ext4_dir_entry_2 *de, 3586a774f9c2STao Ma int blocksize, int csum_size, 3587a774f9c2STao Ma unsigned int parent_ino, int dotdot_real_len); 3588ddce3b94STheodore Ts'o extern void ext4_initialize_dirent_tail(struct buffer_head *bh, 35893c47d541STao Ma unsigned int blocksize); 3590f036adb3STheodore Ts'o extern int ext4_handle_dirty_dirblock(handle_t *handle, struct inode *inode, 35913c47d541STao Ma struct buffer_head *bh); 3592a80f7fcfSHarshad Shirwadkar extern int __ext4_unlink(handle_t *handle, struct inode *dir, const struct qstr *d_name, 35938016e29fSHarshad Shirwadkar struct inode *inode); 35948016e29fSHarshad Shirwadkar extern int __ext4_link(struct inode *dir, struct inode *inode, 35958016e29fSHarshad Shirwadkar struct dentry *dentry); 3596b886ee3eSGabriel Krisman Bertazi 35978af0f082STao Ma #define S_SHIFT 12 3598381cebfeSDan Carpenter static const unsigned char ext4_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = { 35998af0f082STao Ma [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE, 36008af0f082STao Ma [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR, 36018af0f082STao Ma [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV, 36028af0f082STao Ma [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV, 36038af0f082STao Ma [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO, 36048af0f082STao Ma [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK, 36058af0f082STao Ma [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK, 36068af0f082STao Ma }; 36078af0f082STao Ma 36088af0f082STao Ma static inline void ext4_set_de_type(struct super_block *sb, 36098af0f082STao Ma struct ext4_dir_entry_2 *de, 36108af0f082STao Ma umode_t mode) { 3611e2b911c5SDarrick J. Wong if (ext4_has_feature_filetype(sb)) 36128af0f082STao Ma de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; 36138af0f082STao Ma } 36148af0f082STao Ma 3615f64e02feSTheodore Ts'o /* readpages.c */ 3616a07f624bSMatthew Wilcox (Oracle) extern int ext4_mpage_readpages(struct inode *inode, 36176311f91fSMatthew Wilcox (Oracle) struct readahead_control *rac, struct page *page); 361822cfe4b4SEric Biggers extern int __init ext4_init_post_read_processing(void); 361922cfe4b4SEric Biggers extern void ext4_exit_post_read_processing(void); 36203dcf5451SChristoph Hellwig 36213dcf5451SChristoph Hellwig /* symlink.c */ 3622a7a67e8aSAl Viro extern const struct inode_operations ext4_encrypted_symlink_inode_operations; 36233dcf5451SChristoph Hellwig extern const struct inode_operations ext4_symlink_inode_operations; 36243dcf5451SChristoph Hellwig extern const struct inode_operations ext4_fast_symlink_inode_operations; 36253dcf5451SChristoph Hellwig 3626b5799018STheodore Ts'o /* sysfs.c */ 3627*d578b994SJonathan Davies extern void ext4_notify_error_sysfs(struct ext4_sb_info *sbi); 3628b5799018STheodore Ts'o extern int ext4_register_sysfs(struct super_block *sb); 3629ebd173beSTheodore Ts'o extern void ext4_unregister_sysfs(struct super_block *sb); 3630b5799018STheodore Ts'o extern int __init ext4_init_sysfs(void); 3631b5799018STheodore Ts'o extern void ext4_exit_sysfs(void); 3632b5799018STheodore Ts'o 36336fd058f7STheodore Ts'o /* block_validity */ 36346fd058f7STheodore Ts'o extern void ext4_release_system_zone(struct super_block *sb); 36356fd058f7STheodore Ts'o extern int ext4_setup_system_zone(struct super_block *sb); 36365dabfc78STheodore Ts'o extern int __init ext4_init_system_zone(void); 36375dabfc78STheodore Ts'o extern void ext4_exit_system_zone(void); 3638ce9f24ccSJan Kara extern int ext4_inode_block_valid(struct inode *inode, 36396fd058f7STheodore Ts'o ext4_fsblk_t start_blk, 36406fd058f7STheodore Ts'o unsigned int count); 36411f7d1e77STheodore Ts'o extern int ext4_check_blockref(const char *, unsigned int, 36421f7d1e77STheodore Ts'o struct inode *, __le32 *, unsigned int); 36436fd058f7STheodore Ts'o 36443dcf5451SChristoph Hellwig /* extents.c */ 36454a092d73STheodore Ts'o struct ext4_ext_path; 36464a092d73STheodore Ts'o struct ext4_extent; 36474a092d73STheodore Ts'o 3648d7b2a00cSZheng Liu /* 3649d7b2a00cSZheng Liu * Maximum number of logical blocks in a file; ext4_extent's ee_block is 3650d7b2a00cSZheng Liu * __le32. 3651d7b2a00cSZheng Liu */ 3652d7b2a00cSZheng Liu #define EXT_MAX_BLOCKS 0xffffffff 3653d7b2a00cSZheng Liu 36544209ae12SHarshad Shirwadkar extern void ext4_ext_tree_init(handle_t *handle, struct inode *inode); 3655fffb2739SJan Kara extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents); 3656e35fd660STheodore Ts'o extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, 3657e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 3658d0abb36dSTheodore Ts'o extern int ext4_ext_truncate(handle_t *, struct inode *); 365926a4c0c6STheodore Ts'o extern int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start, 366026a4c0c6STheodore Ts'o ext4_lblk_t end); 36613dcf5451SChristoph Hellwig extern void ext4_ext_init(struct super_block *); 36623dcf5451SChristoph Hellwig extern void ext4_ext_release(struct super_block *); 36632fe17c10SChristoph Hellwig extern long ext4_fallocate(struct file *file, int mode, loff_t offset, 36643dcf5451SChristoph Hellwig loff_t len); 36656b523df4SJan Kara extern int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode, 36666b523df4SJan Kara loff_t offset, ssize_t len); 3667a00713eaSRitesh Harjani extern int ext4_convert_unwritten_io_end_vec(handle_t *handle, 3668a00713eaSRitesh Harjani ext4_io_end_t *io_end); 3669e35fd660STheodore Ts'o extern int ext4_map_blocks(handle_t *handle, struct inode *inode, 3670e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 36714a092d73STheodore Ts'o extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode, 36724a092d73STheodore Ts'o int num, 36734a092d73STheodore Ts'o struct ext4_ext_path *path); 36744a092d73STheodore Ts'o extern int ext4_ext_insert_extent(handle_t *, struct inode *, 3675dfe50809STheodore Ts'o struct ext4_ext_path **, 36764a092d73STheodore Ts'o struct ext4_extent *, int); 3677ed8a1a76STheodore Ts'o extern struct ext4_ext_path *ext4_find_extent(struct inode *, ext4_lblk_t, 3678705912caSTheodore Ts'o struct ext4_ext_path **, 3679107a7bd3STheodore Ts'o int flags); 36804a092d73STheodore Ts'o extern void ext4_ext_drop_refs(struct ext4_ext_path *); 36814a092d73STheodore Ts'o extern int ext4_ext_check_inode(struct inode *inode); 3682fcf6b1b7SDmitry Monakhov extern ext4_lblk_t ext4_ext_next_allocated_block(struct ext4_ext_path *path); 36833a06d778SAneesh Kumar K.V extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 36843a06d778SAneesh Kumar K.V __u64 start, __u64 len); 3685bb5835edSTheodore Ts'o extern int ext4_get_es_cache(struct inode *inode, 3686bb5835edSTheodore Ts'o struct fiemap_extent_info *fieinfo, 3687bb5835edSTheodore Ts'o __u64 start, __u64 len); 36887869a4a6STheodore Ts'o extern int ext4_ext_precache(struct inode *inode); 3689fcf6b1b7SDmitry Monakhov extern int ext4_swap_extents(handle_t *handle, struct inode *inode1, 3690fcf6b1b7SDmitry Monakhov struct inode *inode2, ext4_lblk_t lblk1, 3691fcf6b1b7SDmitry Monakhov ext4_lblk_t lblk2, ext4_lblk_t count, 3692fcf6b1b7SDmitry Monakhov int mark_unwritten,int *err); 36930b02f4c0SEric Whitney extern int ext4_clu_mapped(struct inode *inode, ext4_lblk_t lclu); 3694a4130367SJan Kara extern int ext4_datasem_ensure_credits(handle_t *handle, struct inode *inode, 369583448bdfSJan Kara int check_cred, int restart_cred, 369683448bdfSJan Kara int revoke_cred); 36978016e29fSHarshad Shirwadkar extern void ext4_ext_replay_shrink_inode(struct inode *inode, ext4_lblk_t end); 36988016e29fSHarshad Shirwadkar extern int ext4_ext_replay_set_iblocks(struct inode *inode); 36998016e29fSHarshad Shirwadkar extern int ext4_ext_replay_update_ex(struct inode *inode, ext4_lblk_t start, 37008016e29fSHarshad Shirwadkar int len, int unwritten, ext4_fsblk_t pblk); 37018016e29fSHarshad Shirwadkar extern int ext4_ext_clear_bb(struct inode *inode); 3702a4130367SJan Kara 37034a092d73STheodore Ts'o 3704748de673SAkira Fujita /* move_extent.c */ 3705393d1d1dSDr. Tilmann Bubeck extern void ext4_double_down_write_data_sem(struct inode *first, 3706393d1d1dSDr. Tilmann Bubeck struct inode *second); 3707393d1d1dSDr. Tilmann Bubeck extern void ext4_double_up_write_data_sem(struct inode *orig_inode, 3708393d1d1dSDr. Tilmann Bubeck struct inode *donor_inode); 3709748de673SAkira Fujita extern int ext4_move_extents(struct file *o_filp, struct file *d_filp, 3710748de673SAkira Fujita __u64 start_orig, __u64 start_donor, 3711748de673SAkira Fujita __u64 len, __u64 *moved_len); 3712748de673SAkira Fujita 3713bd2d0210STheodore Ts'o /* page-io.c */ 37145dabfc78STheodore Ts'o extern int __init ext4_init_pageio(void); 37155dabfc78STheodore Ts'o extern void ext4_exit_pageio(void); 3716bd2d0210STheodore Ts'o extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags); 371797a851edSJan Kara extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end); 371897a851edSJan Kara extern int ext4_put_io_end(ext4_io_end_t *io_end); 371997a851edSJan Kara extern void ext4_put_io_end_defer(ext4_io_end_t *io_end); 372097a851edSJan Kara extern void ext4_io_submit_init(struct ext4_io_submit *io, 372197a851edSJan Kara struct writeback_control *wbc); 37222e8fa54eSJan Kara extern void ext4_end_io_rsv_work(struct work_struct *work); 3723bd2d0210STheodore Ts'o extern void ext4_io_submit(struct ext4_io_submit *io); 3724bd2d0210STheodore Ts'o extern int ext4_bio_write_page(struct ext4_io_submit *io, 3725bd2d0210STheodore Ts'o struct page *page, 3726bd2d0210STheodore Ts'o int len, 37271c8349a1SNamjae Jeon bool keep_towrite); 3728c8cc8816SRitesh Harjani extern struct ext4_io_end_vec *ext4_alloc_io_end_vec(ext4_io_end_t *io_end); 3729c8cc8816SRitesh Harjani extern struct ext4_io_end_vec *ext4_last_io_end_vec(ext4_io_end_t *io_end); 37303a06d778SAneesh Kumar K.V 3731c5e06d10SJohann Lombardi /* mmp.c */ 3732c5e06d10SJohann Lombardi extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t); 3733c5e06d10SJohann Lombardi 3734618f0031SPavel Skripkin /* mmp.c */ 3735618f0031SPavel Skripkin extern void ext4_stop_mmpd(struct ext4_sb_info *sbi); 3736618f0031SPavel Skripkin 3737c93d8f88SEric Biggers /* verity.c */ 3738c93d8f88SEric Biggers extern const struct fsverity_operations ext4_verityops; 3739c93d8f88SEric Biggers 37403613d228SJan Kara /* 374148fc7f7eSAdam Buchbinder * Add new method to test whether block and inode bitmaps are properly 37422ccb5fb9SAneesh Kumar K.V * initialized. With uninit_bg reading the block from disk is not enough 37432ccb5fb9SAneesh Kumar K.V * to mark the bitmap uptodate. We need to also zero-out the bitmap 37442ccb5fb9SAneesh Kumar K.V */ 37452ccb5fb9SAneesh Kumar K.V #define BH_BITMAP_UPTODATE BH_JBDPrivateStart 37462ccb5fb9SAneesh Kumar K.V 37472ccb5fb9SAneesh Kumar K.V static inline int bitmap_uptodate(struct buffer_head *bh) 37482ccb5fb9SAneesh Kumar K.V { 37492ccb5fb9SAneesh Kumar K.V return (buffer_uptodate(bh) && 37502ccb5fb9SAneesh Kumar K.V test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state)); 37512ccb5fb9SAneesh Kumar K.V } 37522ccb5fb9SAneesh Kumar K.V static inline void set_bitmap_uptodate(struct buffer_head *bh) 37532ccb5fb9SAneesh Kumar K.V { 37542ccb5fb9SAneesh Kumar K.V set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state); 37552ccb5fb9SAneesh Kumar K.V } 37562ccb5fb9SAneesh Kumar K.V 3757731eb1a0SAkinobu Mita #define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1) 3758731eb1a0SAkinobu Mita 3759e9e3bcecSEric Sandeen /* For ioend & aio unwritten conversion wait queues */ 3760e9e3bcecSEric Sandeen #define EXT4_WQ_HASH_SZ 37 3761e9e3bcecSEric Sandeen #define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\ 3762e9e3bcecSEric Sandeen EXT4_WQ_HASH_SZ]) 3763e9e3bcecSEric Sandeen extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 3764e9e3bcecSEric Sandeen 37658f82f840SYongqiang Yang extern int ext4_resize_begin(struct super_block *sb); 37668f82f840SYongqiang Yang extern void ext4_resize_end(struct super_block *sb); 37678f82f840SYongqiang Yang 376874c66bcbSJan Kara static inline void ext4_set_io_unwritten_flag(struct inode *inode, 376974c66bcbSJan Kara struct ext4_io_end *io_end) 377074c66bcbSJan Kara { 377174c66bcbSJan Kara if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) { 377274c66bcbSJan Kara io_end->flag |= EXT4_IO_END_UNWRITTEN; 377374c66bcbSJan Kara atomic_inc(&EXT4_I(inode)->i_unwritten); 377474c66bcbSJan Kara } 377574c66bcbSJan Kara } 377674c66bcbSJan Kara 377774c66bcbSJan Kara static inline void ext4_clear_io_unwritten_flag(ext4_io_end_t *io_end) 377874c66bcbSJan Kara { 377974c66bcbSJan Kara struct inode *inode = io_end->inode; 378074c66bcbSJan Kara 378174c66bcbSJan Kara if (io_end->flag & EXT4_IO_END_UNWRITTEN) { 378274c66bcbSJan Kara io_end->flag &= ~EXT4_IO_END_UNWRITTEN; 378374c66bcbSJan Kara /* Wake up anyone waiting on unwritten extent conversion */ 378474c66bcbSJan Kara if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten)) 378574c66bcbSJan Kara wake_up_all(ext4_ioend_wq(inode)); 378674c66bcbSJan Kara } 378774c66bcbSJan Kara } 378874c66bcbSJan Kara 37898ff6daa1SChristoph Hellwig extern const struct iomap_ops ext4_iomap_ops; 37908cd115bdSJan Kara extern const struct iomap_ops ext4_iomap_overwrite_ops; 379109edf4d3SMatthew Bobrowski extern const struct iomap_ops ext4_iomap_report_ops; 3792364443cbSJan Kara 37937963e5acSZhangXiaoxu static inline int ext4_buffer_uptodate(struct buffer_head *bh) 37947963e5acSZhangXiaoxu { 37957963e5acSZhangXiaoxu /* 37967963e5acSZhangXiaoxu * If the buffer has the write error flag, we have failed 37977963e5acSZhangXiaoxu * to write out data in the block. In this case, we don't 37987963e5acSZhangXiaoxu * have to read the block because we may read the old data 37997963e5acSZhangXiaoxu * successfully. 38007963e5acSZhangXiaoxu */ 38015c680150SJoseph Qi if (buffer_write_io_error(bh)) 38027963e5acSZhangXiaoxu set_buffer_uptodate(bh); 38037963e5acSZhangXiaoxu return buffer_uptodate(bh); 38047963e5acSZhangXiaoxu } 38057963e5acSZhangXiaoxu 38063dcf5451SChristoph Hellwig #endif /* __KERNEL__ */ 38073dcf5451SChristoph Hellwig 38086a797d27SDarrick J. Wong #define EFSBADCRC EBADMSG /* Bad CRC detected */ 38096a797d27SDarrick J. Wong #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 38106a797d27SDarrick J. Wong 38113dcf5451SChristoph Hellwig #endif /* _EXT4_H */ 3812