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> 30a4dad1aeSDavid Turner #include <linux/version.h> 31ca0faba0STheodore Ts'o #include <linux/wait.h> 32174cd4b1SIngo Molnar #include <linux/sched/signal.h> 33ca0faba0STheodore Ts'o #include <linux/blockgroup_lock.h> 34ca0faba0STheodore Ts'o #include <linux/percpu_counter.h> 35efbed4dcSTheodore Ts'o #include <linux/ratelimit.h> 360441984aSDarrick J. Wong #include <crypto/hash.h> 37a633f5a3SLukas Czerner #include <linux/falloc.h> 38c8585c6fSDaeho Jeong #include <linux/percpu-rwsem.h> 394d92dc0fSBen Hutchings #ifdef __KERNEL__ 404d92dc0fSBen Hutchings #include <linux/compat.h> 414d92dc0fSBen Hutchings #endif 423dcf5451SChristoph Hellwig 43734f0d24SDave Chinner #define __FS_HAS_ENCRYPTION IS_ENABLED(CONFIG_EXT4_FS_ENCRYPTION) 44734f0d24SDave Chinner #include <linux/fscrypt.h> 45734f0d24SDave Chinner 46072ebb3bSTheodore Ts'o #include <linux/compiler.h> 47072ebb3bSTheodore Ts'o 48072ebb3bSTheodore Ts'o /* Until this gets included into linux/compiler-gcc.h */ 49072ebb3bSTheodore Ts'o #ifndef __nonstring 50072ebb3bSTheodore Ts'o #if defined(GCC_VERSION) && (GCC_VERSION >= 80000) 51072ebb3bSTheodore Ts'o #define __nonstring __attribute__((nonstring)) 52072ebb3bSTheodore Ts'o #else 53072ebb3bSTheodore Ts'o #define __nonstring 54072ebb3bSTheodore Ts'o #endif 55072ebb3bSTheodore Ts'o #endif 56072ebb3bSTheodore Ts'o 573dcf5451SChristoph Hellwig /* 588a35694eSShen Feng * The fourth extended filesystem constants/structures 593dcf5451SChristoph Hellwig */ 603dcf5451SChristoph Hellwig 613dcf5451SChristoph Hellwig /* 62a2821e34SAihua Zhang * with AGGRESSIVE_CHECK allocator runs consistency checks over 63a2821e34SAihua Zhang * structures. these checks slow things down a lot 64a2821e34SAihua Zhang */ 65a2821e34SAihua Zhang #define AGGRESSIVE_CHECK__ 66a2821e34SAihua Zhang 67a2821e34SAihua Zhang /* 68a2821e34SAihua Zhang * with DOUBLE_CHECK defined mballoc creates persistent in-core 69a2821e34SAihua Zhang * bitmaps, maintains and uses them to check for double allocations 70a2821e34SAihua Zhang */ 71a2821e34SAihua Zhang #define DOUBLE_CHECK__ 72a2821e34SAihua Zhang 73a2821e34SAihua Zhang /* 743dcf5451SChristoph Hellwig * Define EXT4FS_DEBUG to produce debug messages 753dcf5451SChristoph Hellwig */ 763dcf5451SChristoph Hellwig #undef EXT4FS_DEBUG 773dcf5451SChristoph Hellwig 783dcf5451SChristoph Hellwig /* 793dcf5451SChristoph Hellwig * Debug code 803dcf5451SChristoph Hellwig */ 813dcf5451SChristoph Hellwig #ifdef EXT4FS_DEBUG 823dcf5451SChristoph Hellwig #define ext4_debug(f, a...) \ 833dcf5451SChristoph Hellwig do { \ 843dcf5451SChristoph Hellwig printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ 854db9c54aSStoyan Gaydarov __FILE__, __LINE__, __func__); \ 863dcf5451SChristoph Hellwig printk(KERN_DEBUG f, ## a); \ 873dcf5451SChristoph Hellwig } while (0) 883dcf5451SChristoph Hellwig #else 89ace36ad4SJoe Perches #define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) 903dcf5451SChristoph Hellwig #endif 913dcf5451SChristoph Hellwig 924a092d73STheodore Ts'o /* 934a092d73STheodore Ts'o * Turn on EXT_DEBUG to get lots of info about extents operations. 944a092d73STheodore Ts'o */ 954a092d73STheodore Ts'o #define EXT_DEBUG__ 964a092d73STheodore Ts'o #ifdef EXT_DEBUG 974a092d73STheodore Ts'o #define ext_debug(fmt, ...) printk(fmt, ##__VA_ARGS__) 984a092d73STheodore Ts'o #else 994a092d73STheodore Ts'o #define ext_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) 1004a092d73STheodore Ts'o #endif 1014a092d73STheodore Ts'o 102d444c3c3STheodore Ts'o /* data type for block offset of block group */ 103d444c3c3STheodore Ts'o typedef int ext4_grpblk_t; 104d444c3c3STheodore Ts'o 105d444c3c3STheodore Ts'o /* data type for filesystem-wide blocks number */ 106d444c3c3STheodore Ts'o typedef unsigned long long ext4_fsblk_t; 107d444c3c3STheodore Ts'o 108d444c3c3STheodore Ts'o /* data type for file logical block number */ 109d444c3c3STheodore Ts'o typedef __u32 ext4_lblk_t; 110d444c3c3STheodore Ts'o 111d444c3c3STheodore Ts'o /* data type for block group number */ 112d444c3c3STheodore Ts'o typedef unsigned int ext4_group_t; 113d444c3c3STheodore Ts'o 114331573feSNamjae Jeon enum SHIFT_DIRECTION { 115331573feSNamjae Jeon SHIFT_LEFT = 0, 116331573feSNamjae Jeon SHIFT_RIGHT, 117331573feSNamjae Jeon }; 118331573feSNamjae Jeon 119296c355cSTheodore Ts'o /* 120296c355cSTheodore Ts'o * Flags used in mballoc's allocation_context flags field. 121296c355cSTheodore Ts'o * 122296c355cSTheodore Ts'o * Also used to show what's going on for debugging purposes when the 123296c355cSTheodore Ts'o * flag field is exported via the traceport interface 124296c355cSTheodore Ts'o */ 125d444c3c3STheodore Ts'o 1263dcf5451SChristoph Hellwig /* prefer goal again. length */ 1270ef90db9STheodore Ts'o #define EXT4_MB_HINT_MERGE 0x0001 1283dcf5451SChristoph Hellwig /* blocks already reserved */ 1290ef90db9STheodore Ts'o #define EXT4_MB_HINT_RESERVED 0x0002 1303dcf5451SChristoph Hellwig /* metadata is being allocated */ 1310ef90db9STheodore Ts'o #define EXT4_MB_HINT_METADATA 0x0004 1323dcf5451SChristoph Hellwig /* first blocks in the file */ 1330ef90db9STheodore Ts'o #define EXT4_MB_HINT_FIRST 0x0008 1343dcf5451SChristoph Hellwig /* search for the best chunk */ 1350ef90db9STheodore Ts'o #define EXT4_MB_HINT_BEST 0x0010 1363dcf5451SChristoph Hellwig /* data is being allocated */ 1370ef90db9STheodore Ts'o #define EXT4_MB_HINT_DATA 0x0020 1383dcf5451SChristoph Hellwig /* don't preallocate (for tails) */ 1390ef90db9STheodore Ts'o #define EXT4_MB_HINT_NOPREALLOC 0x0040 1403dcf5451SChristoph Hellwig /* allocate for locality group */ 1410ef90db9STheodore Ts'o #define EXT4_MB_HINT_GROUP_ALLOC 0x0080 1423dcf5451SChristoph Hellwig /* allocate goal blocks or none */ 1430ef90db9STheodore Ts'o #define EXT4_MB_HINT_GOAL_ONLY 0x0100 1443dcf5451SChristoph Hellwig /* goal is meaningful */ 1450ef90db9STheodore Ts'o #define EXT4_MB_HINT_TRY_GOAL 0x0200 146d2a17637SMingming Cao /* blocks already pre-reserved by delayed allocation */ 1470ef90db9STheodore Ts'o #define EXT4_MB_DELALLOC_RESERVED 0x0400 1484ba74d00STheodore Ts'o /* We are doing stream allocation */ 1494ba74d00STheodore Ts'o #define EXT4_MB_STREAM_ALLOC 0x0800 15055f020dbSAllison Henderson /* Use reserved root blocks if needed */ 15155f020dbSAllison Henderson #define EXT4_MB_USE_ROOT_BLOCKS 0x1000 15227dd4385SLukas Czerner /* Use blocks from reserved pool */ 15327dd4385SLukas Czerner #define EXT4_MB_USE_RESERVED 0x2000 1543dcf5451SChristoph Hellwig 1553dcf5451SChristoph Hellwig struct ext4_allocation_request { 1563dcf5451SChristoph Hellwig /* target inode for block we're allocating */ 1573dcf5451SChristoph Hellwig struct inode *inode; 1583dcf5451SChristoph Hellwig /* how many blocks we want to allocate */ 159498e5f24STheodore Ts'o unsigned int len; 160726447d8SEric Sandeen /* logical block in target inode */ 161726447d8SEric Sandeen ext4_lblk_t logical; 162726447d8SEric Sandeen /* the closest logical allocated block to the left */ 163726447d8SEric Sandeen ext4_lblk_t lleft; 164726447d8SEric Sandeen /* the closest logical allocated block to the right */ 165726447d8SEric Sandeen ext4_lblk_t lright; 166726447d8SEric Sandeen /* phys. target (a hint) */ 167726447d8SEric Sandeen ext4_fsblk_t goal; 168726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the left */ 169726447d8SEric Sandeen ext4_fsblk_t pleft; 170726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the right */ 171726447d8SEric Sandeen ext4_fsblk_t pright; 1723dcf5451SChristoph Hellwig /* flags. see above EXT4_MB_HINT_* */ 173498e5f24STheodore Ts'o unsigned int flags; 1743dcf5451SChristoph Hellwig }; 1753dcf5451SChristoph Hellwig 1763dcf5451SChristoph Hellwig /* 177e35fd660STheodore Ts'o * Logical to physical block mapping, used by ext4_map_blocks() 178e35fd660STheodore Ts'o * 179e35fd660STheodore Ts'o * This structure is used to pass requests into ext4_map_blocks() as 180e35fd660STheodore Ts'o * well as to store the information returned by ext4_map_blocks(). It 181e35fd660STheodore Ts'o * takes less room on the stack than a struct buffer_head. 182e35fd660STheodore Ts'o */ 183e35fd660STheodore Ts'o #define EXT4_MAP_NEW (1 << BH_New) 184e35fd660STheodore Ts'o #define EXT4_MAP_MAPPED (1 << BH_Mapped) 185e35fd660STheodore Ts'o #define EXT4_MAP_UNWRITTEN (1 << BH_Unwritten) 186e35fd660STheodore Ts'o #define EXT4_MAP_BOUNDARY (1 << BH_Boundary) 187e35fd660STheodore Ts'o #define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\ 188cbd7584eSJan Kara EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY) 189e35fd660STheodore Ts'o 190e35fd660STheodore Ts'o struct ext4_map_blocks { 191e35fd660STheodore Ts'o ext4_fsblk_t m_pblk; 192e35fd660STheodore Ts'o ext4_lblk_t m_lblk; 193e35fd660STheodore Ts'o unsigned int m_len; 194e35fd660STheodore Ts'o unsigned int m_flags; 195e35fd660STheodore Ts'o }; 196e35fd660STheodore Ts'o 197e35fd660STheodore Ts'o /* 198bd2d0210STheodore Ts'o * Flags for ext4_io_end->flags 199bd2d0210STheodore Ts'o */ 200bd2d0210STheodore Ts'o #define EXT4_IO_END_UNWRITTEN 0x0001 201bd2d0210STheodore Ts'o 2024188188bSCurt Wohlgemuth /* 203556615dcSLukas Czerner * For converting unwritten extents on a work queue. 'handle' is used for 2046b523df4SJan Kara * buffered writeback. 2054188188bSCurt Wohlgemuth */ 2060031462bSMingming Cao typedef struct ext4_io_end { 2075b3ff237Sjiayingz@google.com (Jiaying Zhang) struct list_head list; /* per-file finished IO list */ 2086b523df4SJan Kara handle_t *handle; /* handle reserved for extent 2096b523df4SJan Kara * conversion */ 2100031462bSMingming Cao struct inode *inode; /* file being written to */ 211b0857d30SJan Kara struct bio *bio; /* Linked list of completed 212b0857d30SJan Kara * bios covering the extent */ 2138d5d02e6SMingming Cao unsigned int flag; /* unwritten or not */ 2143bd6ad7bSJan Kara atomic_t count; /* reference counter */ 215a1de02dcSEric Sandeen loff_t offset; /* offset in the file */ 216a1de02dcSEric Sandeen ssize_t size; /* size of the extent */ 2170031462bSMingming Cao } ext4_io_end_t; 2180031462bSMingming Cao 219bd2d0210STheodore Ts'o struct ext4_io_submit { 2205a33911fSTejun Heo struct writeback_control *io_wbc; 221bd2d0210STheodore Ts'o struct bio *io_bio; 222bd2d0210STheodore Ts'o ext4_io_end_t *io_end; 223bd2d0210STheodore Ts'o sector_t io_next_block; 224bd2d0210STheodore Ts'o }; 225bd2d0210STheodore Ts'o 226b3a3ca8cSTheodore Ts'o /* 2273dcf5451SChristoph Hellwig * Special inodes numbers 2283dcf5451SChristoph Hellwig */ 2293dcf5451SChristoph Hellwig #define EXT4_BAD_INO 1 /* Bad blocks inode */ 2303dcf5451SChristoph Hellwig #define EXT4_ROOT_INO 2 /* Root inode */ 231ae812306SAditya Kali #define EXT4_USR_QUOTA_INO 3 /* User quota inode */ 232ae812306SAditya Kali #define EXT4_GRP_QUOTA_INO 4 /* Group quota inode */ 2333dcf5451SChristoph Hellwig #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ 2343dcf5451SChristoph Hellwig #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ 2353dcf5451SChristoph Hellwig #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ 2363dcf5451SChristoph Hellwig #define EXT4_JOURNAL_INO 8 /* Journal inode */ 2373dcf5451SChristoph Hellwig 2383dcf5451SChristoph Hellwig /* First non-reserved inode for old ext4 filesystems */ 2393dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_FIRST_INO 11 2403dcf5451SChristoph Hellwig 2413dcf5451SChristoph Hellwig /* 2423dcf5451SChristoph Hellwig * Maximal count of links to a file 2433dcf5451SChristoph Hellwig */ 2443dcf5451SChristoph Hellwig #define EXT4_LINK_MAX 65000 2453dcf5451SChristoph Hellwig 2463dcf5451SChristoph Hellwig /* 2473dcf5451SChristoph Hellwig * Macro-instructions used to manage several block sizes 2483dcf5451SChristoph Hellwig */ 2493dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_SIZE 1024 2503dcf5451SChristoph Hellwig #define EXT4_MAX_BLOCK_SIZE 65536 2513dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_LOG_SIZE 10 252fb1813f4SCurt Wohlgemuth #define EXT4_MAX_BLOCK_LOG_SIZE 16 2539e47a4c9STheodore Ts'o #define EXT4_MAX_CLUSTER_LOG_SIZE 30 2543dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2553dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) 2563dcf5451SChristoph Hellwig #else 2573dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) 2583dcf5451SChristoph Hellwig #endif 2593dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32)) 260281b5995STheodore Ts'o #define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \ 261281b5995STheodore Ts'o EXT4_SB(s)->s_cluster_bits) 2623dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2633dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) 264281b5995STheodore Ts'o # define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits) 2653dcf5451SChristoph Hellwig #else 2663dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) 2673dcf5451SChristoph Hellwig #endif 2683dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2693dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) 2703dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) 2713dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) 2723dcf5451SChristoph Hellwig #else 2733dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 2743dcf5451SChristoph Hellwig EXT4_GOOD_OLD_INODE_SIZE : \ 2753dcf5451SChristoph Hellwig (s)->s_inode_size) 2763dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 2773dcf5451SChristoph Hellwig EXT4_GOOD_OLD_FIRST_INO : \ 2783dcf5451SChristoph Hellwig (s)->s_first_ino) 2793dcf5451SChristoph Hellwig #endif 2803dcf5451SChristoph Hellwig #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) 281518eaa63SFabian Frederick #define EXT4_MAX_BLOCKS(size, offset, blkbits) \ 282518eaa63SFabian Frederick ((EXT4_BLOCK_ALIGN(size + offset, blkbits) >> blkbits) - (offset >> \ 283518eaa63SFabian Frederick blkbits)) 2843dcf5451SChristoph Hellwig 285d5b8f310STheodore Ts'o /* Translate a block number to a cluster number */ 286d5b8f310STheodore Ts'o #define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits) 287d5b8f310STheodore Ts'o /* Translate a cluster number to a block number */ 288d5b8f310STheodore Ts'o #define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits) 289d5b8f310STheodore Ts'o /* Translate # of blks to # of clusters */ 290d5b8f310STheodore Ts'o #define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \ 291d5b8f310STheodore Ts'o (sbi)->s_cluster_bits) 292f5a44db5STheodore Ts'o /* Mask out the low bits to get the starting block of the cluster */ 293f5a44db5STheodore Ts'o #define EXT4_PBLK_CMASK(s, pblk) ((pblk) & \ 294f5a44db5STheodore Ts'o ~((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 295f5a44db5STheodore Ts'o #define EXT4_LBLK_CMASK(s, lblk) ((lblk) & \ 296f5a44db5STheodore Ts'o ~((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 297f5a44db5STheodore Ts'o /* Get the cluster offset */ 298f5a44db5STheodore Ts'o #define EXT4_PBLK_COFF(s, pblk) ((pblk) & \ 299f5a44db5STheodore Ts'o ((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 300f5a44db5STheodore Ts'o #define EXT4_LBLK_COFF(s, lblk) ((lblk) & \ 301f5a44db5STheodore Ts'o ((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 302d5b8f310STheodore Ts'o 3033dcf5451SChristoph Hellwig /* 3043dcf5451SChristoph Hellwig * Structure of a blocks group descriptor 3053dcf5451SChristoph Hellwig */ 3063dcf5451SChristoph Hellwig struct ext4_group_desc 3073dcf5451SChristoph Hellwig { 3083dcf5451SChristoph Hellwig __le32 bg_block_bitmap_lo; /* Blocks bitmap block */ 3093dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ 3103dcf5451SChristoph Hellwig __le32 bg_inode_table_lo; /* Inodes table block */ 311560671a0SAneesh Kumar K.V __le16 bg_free_blocks_count_lo;/* Free blocks count */ 312560671a0SAneesh Kumar K.V __le16 bg_free_inodes_count_lo;/* Free inodes count */ 313560671a0SAneesh Kumar K.V __le16 bg_used_dirs_count_lo; /* Directories count */ 3143dcf5451SChristoph Hellwig __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ 315e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_lo; /* Exclude bitmap for snapshots */ 316e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+bbitmap) LE */ 317e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+ibitmap) LE */ 318560671a0SAneesh Kumar K.V __le16 bg_itable_unused_lo; /* Unused inodes count */ 3193dcf5451SChristoph Hellwig __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ 3203dcf5451SChristoph Hellwig __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ 3213dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ 3223dcf5451SChristoph Hellwig __le32 bg_inode_table_hi; /* Inodes table block MSB */ 3233dcf5451SChristoph Hellwig __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */ 3243dcf5451SChristoph Hellwig __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */ 3253dcf5451SChristoph Hellwig __le16 bg_used_dirs_count_hi; /* Directories count MSB */ 3263dcf5451SChristoph Hellwig __le16 bg_itable_unused_hi; /* Unused inodes count MSB */ 327e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_hi; /* Exclude bitmap block MSB */ 328e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+bbitmap) BE */ 329e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+ibitmap) BE */ 330e6153918SDarrick J. Wong __u32 bg_reserved; 3313dcf5451SChristoph Hellwig }; 3323dcf5451SChristoph Hellwig 33341a246d1SDarrick J. Wong #define EXT4_BG_INODE_BITMAP_CSUM_HI_END \ 33441a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \ 33541a246d1SDarrick J. Wong sizeof(__le16)) 33641a246d1SDarrick J. Wong #define EXT4_BG_BLOCK_BITMAP_CSUM_HI_END \ 33741a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \ 33841a246d1SDarrick J. Wong sizeof(__le16)) 33941a246d1SDarrick J. Wong 340772cb7c8SJose R. Santos /* 341772cb7c8SJose R. Santos * Structure of a flex block group info 342772cb7c8SJose R. Santos */ 343772cb7c8SJose R. Santos 344772cb7c8SJose R. Santos struct flex_groups { 34590ba983fSTheodore Ts'o atomic64_t free_clusters; 3469f24e420STheodore Ts'o atomic_t free_inodes; 3477d39db14STheodore Ts'o atomic_t used_dirs; 348772cb7c8SJose R. Santos }; 349772cb7c8SJose R. Santos 3503dcf5451SChristoph Hellwig #define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ 3513dcf5451SChristoph Hellwig #define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ 3523dcf5451SChristoph Hellwig #define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ 3533dcf5451SChristoph Hellwig 3543dcf5451SChristoph Hellwig /* 3553dcf5451SChristoph Hellwig * Macro-instructions used to manage group descriptors 3563dcf5451SChristoph Hellwig */ 3573dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE 32 3583dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE_64BIT 64 3593dcf5451SChristoph Hellwig #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE 3603dcf5451SChristoph Hellwig #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) 3613dcf5451SChristoph Hellwig #ifdef __KERNEL__ 3623dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) 363281b5995STheodore Ts'o # define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group) 3643dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) 3653dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) 3663dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) 3673dcf5451SChristoph Hellwig #else 3683dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) 3693dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) 3703dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) 3713dcf5451SChristoph Hellwig #endif 3723dcf5451SChristoph Hellwig 3733dcf5451SChristoph Hellwig /* 3743dcf5451SChristoph Hellwig * Constants relative to the data blocks 3753dcf5451SChristoph Hellwig */ 3763dcf5451SChristoph Hellwig #define EXT4_NDIR_BLOCKS 12 3773dcf5451SChristoph Hellwig #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS 3783dcf5451SChristoph Hellwig #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) 3793dcf5451SChristoph Hellwig #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) 3803dcf5451SChristoph Hellwig #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) 3813dcf5451SChristoph Hellwig 3823dcf5451SChristoph Hellwig /* 3833dcf5451SChristoph Hellwig * Inode flags 3843dcf5451SChristoph Hellwig */ 3853dcf5451SChristoph Hellwig #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ 3863dcf5451SChristoph Hellwig #define EXT4_UNRM_FL 0x00000002 /* Undelete */ 3873dcf5451SChristoph Hellwig #define EXT4_COMPR_FL 0x00000004 /* Compress file */ 3883dcf5451SChristoph Hellwig #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ 3893dcf5451SChristoph Hellwig #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ 3903dcf5451SChristoph Hellwig #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ 3913dcf5451SChristoph Hellwig #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ 3923dcf5451SChristoph Hellwig #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ 3933dcf5451SChristoph Hellwig /* Reserved for compression usage... */ 3943dcf5451SChristoph Hellwig #define EXT4_DIRTY_FL 0x00000100 3953dcf5451SChristoph Hellwig #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 3963dcf5451SChristoph Hellwig #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ 3973edc18d8STheodore Ts'o /* nb: was previously EXT2_ECOMPR_FL */ 3983edc18d8STheodore Ts'o #define EXT4_ENCRYPT_FL 0x00000800 /* encrypted file */ 3993dcf5451SChristoph Hellwig /* End compression flags --- maybe not all used */ 4003dcf5451SChristoph Hellwig #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ 4013dcf5451SChristoph Hellwig #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ 4023dcf5451SChristoph Hellwig #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ 4033dcf5451SChristoph Hellwig #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 4043dcf5451SChristoph Hellwig #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ 4053dcf5451SChristoph Hellwig #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 4063dcf5451SChristoph Hellwig #define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ 4073dcf5451SChristoph Hellwig #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ 408f710b4b9STheodore Ts'o #define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ 409c8d46e41SJiaying Zhang #define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */ 41067cf5b09STao Ma #define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */ 4118b4953e1STheodore Ts'o #define EXT4_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ 4123dcf5451SChristoph Hellwig #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ 4133dcf5451SChristoph Hellwig 414040cb378SLi Xi #define EXT4_FL_USER_VISIBLE 0x304BDFFF /* User visible flags */ 415f8011d93SJan Kara #define EXT4_FL_USER_MODIFIABLE 0x204BC0FF /* User modifiable flags */ 4163dcf5451SChristoph Hellwig 417d14e7683SJan Kara /* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */ 4189b7365fcSLi Xi #define EXT4_FL_XFLAG_VISIBLE (EXT4_SYNC_FL | \ 4199b7365fcSLi Xi EXT4_IMMUTABLE_FL | \ 4209b7365fcSLi Xi EXT4_APPEND_FL | \ 4219b7365fcSLi Xi EXT4_NODUMP_FL | \ 4229b7365fcSLi Xi EXT4_NOATIME_FL | \ 4239b7365fcSLi Xi EXT4_PROJINHERIT_FL) 4249b7365fcSLi Xi 4258fa43a81SDuane Griffin /* Flags that should be inherited by new inodes from their parent. */ 4268fa43a81SDuane Griffin #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\ 4271cd9f097STheodore Ts'o EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\ 4288fa43a81SDuane Griffin EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\ 429040cb378SLi Xi EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL |\ 430040cb378SLi Xi EXT4_PROJINHERIT_FL) 4318fa43a81SDuane Griffin 4322dc6b0d4SDuane Griffin /* Flags that are appropriate for regular files (all but dir-specific ones). */ 4332dc6b0d4SDuane Griffin #define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL)) 4342dc6b0d4SDuane Griffin 4352dc6b0d4SDuane Griffin /* Flags that are appropriate for non-directories/regular files. */ 4362dc6b0d4SDuane Griffin #define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL) 4372dc6b0d4SDuane Griffin 4382dc6b0d4SDuane Griffin /* Mask out flags that are inappropriate for the given type of inode. */ 4392dc6b0d4SDuane Griffin static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags) 4402dc6b0d4SDuane Griffin { 4412dc6b0d4SDuane Griffin if (S_ISDIR(mode)) 4422dc6b0d4SDuane Griffin return flags; 4432dc6b0d4SDuane Griffin else if (S_ISREG(mode)) 4442dc6b0d4SDuane Griffin return flags & EXT4_REG_FLMASK; 4452dc6b0d4SDuane Griffin else 4462dc6b0d4SDuane Griffin return flags & EXT4_OTHER_FLMASK; 4472dc6b0d4SDuane Griffin } 4482dc6b0d4SDuane Griffin 44912e9b892SDmitry Monakhov /* 45012e9b892SDmitry Monakhov * Inode flags used for atomic set/get 45112e9b892SDmitry Monakhov */ 45212e9b892SDmitry Monakhov enum { 45312e9b892SDmitry Monakhov EXT4_INODE_SECRM = 0, /* Secure deletion */ 45412e9b892SDmitry Monakhov EXT4_INODE_UNRM = 1, /* Undelete */ 45512e9b892SDmitry Monakhov EXT4_INODE_COMPR = 2, /* Compress file */ 45612e9b892SDmitry Monakhov EXT4_INODE_SYNC = 3, /* Synchronous updates */ 45712e9b892SDmitry Monakhov EXT4_INODE_IMMUTABLE = 4, /* Immutable file */ 45812e9b892SDmitry Monakhov EXT4_INODE_APPEND = 5, /* writes to file may only append */ 45912e9b892SDmitry Monakhov EXT4_INODE_NODUMP = 6, /* do not dump file */ 46012e9b892SDmitry Monakhov EXT4_INODE_NOATIME = 7, /* do not update atime */ 46112e9b892SDmitry Monakhov /* Reserved for compression usage... */ 46212e9b892SDmitry Monakhov EXT4_INODE_DIRTY = 8, 46312e9b892SDmitry Monakhov EXT4_INODE_COMPRBLK = 9, /* One or more compressed clusters */ 46412e9b892SDmitry Monakhov EXT4_INODE_NOCOMPR = 10, /* Don't compress */ 465f542fbe8STheodore Ts'o EXT4_INODE_ENCRYPT = 11, /* Encrypted file */ 46612e9b892SDmitry Monakhov /* End compression flags --- maybe not all used */ 46712e9b892SDmitry Monakhov EXT4_INODE_INDEX = 12, /* hash-indexed directory */ 46812e9b892SDmitry Monakhov EXT4_INODE_IMAGIC = 13, /* AFS directory */ 46912e9b892SDmitry Monakhov EXT4_INODE_JOURNAL_DATA = 14, /* file data should be journaled */ 47012e9b892SDmitry Monakhov EXT4_INODE_NOTAIL = 15, /* file tail should not be merged */ 47112e9b892SDmitry Monakhov EXT4_INODE_DIRSYNC = 16, /* dirsync behaviour (directories only) */ 47212e9b892SDmitry Monakhov EXT4_INODE_TOPDIR = 17, /* Top of directory hierarchies*/ 47312e9b892SDmitry Monakhov EXT4_INODE_HUGE_FILE = 18, /* Set to each huge file */ 47412e9b892SDmitry Monakhov EXT4_INODE_EXTENTS = 19, /* Inode uses extents */ 47512e9b892SDmitry Monakhov EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */ 47612e9b892SDmitry Monakhov EXT4_INODE_EOFBLOCKS = 22, /* Blocks allocated beyond EOF */ 47767cf5b09STao Ma EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */ 4788b4953e1STheodore Ts'o EXT4_INODE_PROJINHERIT = 29, /* Create with parents projid */ 47912e9b892SDmitry Monakhov EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */ 48012e9b892SDmitry Monakhov }; 48112e9b892SDmitry Monakhov 48212e9b892SDmitry Monakhov /* 4839a4c8019SCarlos Maiolino * Since it's pretty easy to mix up bit numbers and hex values, we use a 4849a4c8019SCarlos Maiolino * build-time check to make sure that EXT4_XXX_FL is consistent with respect to 4859a4c8019SCarlos Maiolino * EXT4_INODE_XXX. If all is well, the macros will be dropped, so, it won't cost 4869a4c8019SCarlos Maiolino * any extra space in the compiled kernel image, otherwise, the build will fail. 4879a4c8019SCarlos Maiolino * It's important that these values are the same, since we are using 4889a4c8019SCarlos Maiolino * EXT4_INODE_XXX to test for flag values, but EXT4_XXX_FL must be consistent 4899a4c8019SCarlos Maiolino * with the values of FS_XXX_FL defined in include/linux/fs.h and the on-disk 4909a4c8019SCarlos Maiolino * values found in ext2, ext3 and ext4 filesystems, and of course the values 4919a4c8019SCarlos Maiolino * defined in e2fsprogs. 49212e9b892SDmitry Monakhov * 49312e9b892SDmitry Monakhov * It's not paranoia if the Murphy's Law really *is* out to get you. :-) 49412e9b892SDmitry Monakhov */ 4959a4c8019SCarlos Maiolino #define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG)) 4969a4c8019SCarlos Maiolino #define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG)) 4979a4c8019SCarlos Maiolino 49812e9b892SDmitry Monakhov static inline void ext4_check_flag_values(void) 49912e9b892SDmitry Monakhov { 50012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SECRM); 50112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(UNRM); 50212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPR); 50312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SYNC); 50412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMMUTABLE); 50512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(APPEND); 50612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NODUMP); 50712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOATIME); 50812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRTY); 50912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPRBLK); 51012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOCOMPR); 5113edc18d8STheodore Ts'o CHECK_FLAG_VALUE(ENCRYPT); 51212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(INDEX); 51312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMAGIC); 51412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(JOURNAL_DATA); 51512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOTAIL); 51612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRSYNC); 51712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(TOPDIR); 51812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(HUGE_FILE); 51912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EXTENTS); 52012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EA_INODE); 52112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EOFBLOCKS); 52267cf5b09STao Ma CHECK_FLAG_VALUE(INLINE_DATA); 5238b4953e1STheodore Ts'o CHECK_FLAG_VALUE(PROJINHERIT); 52412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(RESERVED); 52512e9b892SDmitry Monakhov } 52612e9b892SDmitry Monakhov 5273dcf5451SChristoph Hellwig /* Used to pass group descriptor data when online resize is done */ 5283dcf5451SChristoph Hellwig struct ext4_new_group_input { 5293dcf5451SChristoph Hellwig __u32 group; /* Group number for this data */ 5303dcf5451SChristoph Hellwig __u64 block_bitmap; /* Absolute block number of block bitmap */ 5313dcf5451SChristoph Hellwig __u64 inode_bitmap; /* Absolute block number of inode bitmap */ 5323dcf5451SChristoph Hellwig __u64 inode_table; /* Absolute block number of inode table start */ 5333dcf5451SChristoph Hellwig __u32 blocks_count; /* Total number of blocks in this group */ 5343dcf5451SChristoph Hellwig __u16 reserved_blocks; /* Number of reserved blocks in this group */ 5353dcf5451SChristoph Hellwig __u16 unused; 5363dcf5451SChristoph Hellwig }; 5373dcf5451SChristoph Hellwig 5384d92dc0fSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 5394d92dc0fSBen Hutchings struct compat_ext4_new_group_input { 5404d92dc0fSBen Hutchings u32 group; 5414d92dc0fSBen Hutchings compat_u64 block_bitmap; 5424d92dc0fSBen Hutchings compat_u64 inode_bitmap; 5434d92dc0fSBen Hutchings compat_u64 inode_table; 5444d92dc0fSBen Hutchings u32 blocks_count; 5454d92dc0fSBen Hutchings u16 reserved_blocks; 5464d92dc0fSBen Hutchings u16 unused; 5474d92dc0fSBen Hutchings }; 5484d92dc0fSBen Hutchings #endif 5494d92dc0fSBen Hutchings 5503dcf5451SChristoph Hellwig /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ 5513dcf5451SChristoph Hellwig struct ext4_new_group_data { 5523dcf5451SChristoph Hellwig __u32 group; 5533dcf5451SChristoph Hellwig __u64 block_bitmap; 5543dcf5451SChristoph Hellwig __u64 inode_bitmap; 5553dcf5451SChristoph Hellwig __u64 inode_table; 5563dcf5451SChristoph Hellwig __u32 blocks_count; 5573dcf5451SChristoph Hellwig __u16 reserved_blocks; 558d77147ffSharshads __u16 mdata_blocks; 559d77147ffSharshads __u32 free_clusters_count; 5603dcf5451SChristoph Hellwig }; 5613dcf5451SChristoph Hellwig 56233afdcc5SYongqiang Yang /* Indexes used to index group tables in ext4_new_group_data */ 56333afdcc5SYongqiang Yang enum { 56433afdcc5SYongqiang Yang BLOCK_BITMAP = 0, /* block bitmap */ 56533afdcc5SYongqiang Yang INODE_BITMAP, /* inode bitmap */ 56633afdcc5SYongqiang Yang INODE_TABLE, /* inode tables */ 56733afdcc5SYongqiang Yang GROUP_TABLE_COUNT, 56833afdcc5SYongqiang Yang }; 56933afdcc5SYongqiang Yang 5703dcf5451SChristoph Hellwig /* 57179e83036SEric Sandeen * Flags used by ext4_map_blocks() 5723dcf5451SChristoph Hellwig */ 573556615dcSLukas Czerner /* Allocate any needed blocks and/or convert an unwritten 574c2177057STheodore Ts'o extent to be an initialized ext4 */ 5752ac3b6e0STheodore Ts'o #define EXT4_GET_BLOCKS_CREATE 0x0001 576556615dcSLukas Czerner /* Request the creation of an unwritten extent */ 577556615dcSLukas Czerner #define EXT4_GET_BLOCKS_UNWRIT_EXT 0x0002 578556615dcSLukas Czerner #define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT (EXT4_GET_BLOCKS_UNWRIT_EXT|\ 579c2177057STheodore Ts'o EXT4_GET_BLOCKS_CREATE) 58027dd4385SLukas Czerner /* Caller is from the delayed allocation writeout path 58127dd4385SLukas Czerner * finally doing the actual allocation of delayed blocks */ 58203f5d8bcSJan Kara #define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004 5830031462bSMingming Cao /* caller is from the direct IO path, request to creation of an 584556615dcSLukas Czerner unwritten extents if not allocated, split the unwritten 5850031462bSMingming Cao extent if blocks has been preallocated already*/ 586c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_PRE_IO 0x0008 5871296cc85SAneesh Kumar K.V #define EXT4_GET_BLOCKS_CONVERT 0x0010 588c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\ 589556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 590c7064ef1SJiaying Zhang /* Convert extent to initialized after IO complete */ 591c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\ 592556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 59327dd4385SLukas Czerner /* Eventual metadata allocation (due to growing extent tree) 59427dd4385SLukas Czerner * should not fail, so try to use reserved blocks for that.*/ 59527dd4385SLukas Czerner #define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020 596556b27abSVivek Haldar /* Don't normalize allocation size (used for fallocate) */ 597556b27abSVivek Haldar #define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040 598a4e5d88bSDmitry Monakhov /* Request will not result in inode size update (user for fallocate) */ 599a4e5d88bSDmitry Monakhov #define EXT4_GET_BLOCKS_KEEP_SIZE 0x0080 600b8a86845SLukas Czerner /* Convert written extents to unwritten */ 6012dcba478SJan Kara #define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN 0x0100 602c86d8db3SJan Kara /* Write zeros to newly created written extents */ 603c86d8db3SJan Kara #define EXT4_GET_BLOCKS_ZERO 0x0200 604c86d8db3SJan Kara #define EXT4_GET_BLOCKS_CREATE_ZERO (EXT4_GET_BLOCKS_CREATE |\ 605c86d8db3SJan Kara EXT4_GET_BLOCKS_ZERO) 606ee0876bcSJan Kara /* Caller will submit data before dropping transaction handle. This 607ee0876bcSJan Kara * allows jbd2 to avoid submitting data before commit. */ 608ee0876bcSJan Kara #define EXT4_GET_BLOCKS_IO_SUBMIT 0x0400 6093dcf5451SChristoph Hellwig 6103dcf5451SChristoph Hellwig /* 6117869a4a6STheodore Ts'o * The bit position of these flags must not overlap with any of the 612ed8a1a76STheodore Ts'o * EXT4_GET_BLOCKS_*. They are used by ext4_find_extent(), 613107a7bd3STheodore Ts'o * read_extent_tree_block(), ext4_split_extent_at(), 6147869a4a6STheodore Ts'o * ext4_ext_insert_extent(), and ext4_ext_create_new_leaf(). 6157869a4a6STheodore Ts'o * EXT4_EX_NOCACHE is used to indicate that the we shouldn't be 6167869a4a6STheodore Ts'o * caching the extents when reading from the extent tree while a 6177869a4a6STheodore Ts'o * truncate or punch hole operation is in progress. 618107a7bd3STheodore Ts'o */ 619d26e2c4dSTheodore Ts'o #define EXT4_EX_NOCACHE 0x40000000 620d26e2c4dSTheodore Ts'o #define EXT4_EX_FORCE_CACHE 0x20000000 621107a7bd3STheodore Ts'o 622107a7bd3STheodore Ts'o /* 623e6362609STheodore Ts'o * Flags used by ext4_free_blocks 624e6362609STheodore Ts'o */ 625e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_METADATA 0x0001 626e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_FORGET 0x0002 6271f2acb60STheodore Ts'o #define EXT4_FREE_BLOCKS_VALIDATED 0x0004 6287132de74SMaxim Patlasov #define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008 62984130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010 63084130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020 6319fe67149SEric Whitney #define EXT4_FREE_BLOCKS_RERESERVE_CLUSTER 0x0040 632e6362609STheodore Ts'o 633e6362609STheodore Ts'o /* 6343dcf5451SChristoph Hellwig * ioctl commands 6353dcf5451SChristoph Hellwig */ 6363dcf5451SChristoph Hellwig #define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS 6373dcf5451SChristoph Hellwig #define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS 6383dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION _IOR('f', 3, long) 6393dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION _IOW('f', 4, long) 6403dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION 6413dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION 6423dcf5451SChristoph Hellwig #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) 6433dcf5451SChristoph Hellwig #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) 6448eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) 6458eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) 6468eea80d5STheodore Ts'o #define EXT4_IOC_MIGRATE _IO('f', 9) 647ccd2506bSTheodore Ts'o /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */ 6488eea80d5STheodore Ts'o /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ 649ccd2506bSTheodore Ts'o #define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12) 650748de673SAkira Fujita #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent) 65119c5246dSYongqiang Yang #define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) 652393d1d1dSDr. Tilmann Bubeck #define EXT4_IOC_SWAP_BOOT _IO('f', 17) 6537869a4a6STheodore Ts'o #define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18) 654a7550b30SJaegeuk Kim #define EXT4_IOC_SET_ENCRYPTION_POLICY FS_IOC_SET_ENCRYPTION_POLICY 655a7550b30SJaegeuk Kim #define EXT4_IOC_GET_ENCRYPTION_PWSALT FS_IOC_GET_ENCRYPTION_PWSALT 656a7550b30SJaegeuk Kim #define EXT4_IOC_GET_ENCRYPTION_POLICY FS_IOC_GET_ENCRYPTION_POLICY 6573dcf5451SChristoph Hellwig 6589b7365fcSLi Xi #define EXT4_IOC_FSGETXATTR FS_IOC_FSGETXATTR 6599b7365fcSLi Xi #define EXT4_IOC_FSSETXATTR FS_IOC_FSSETXATTR 6609b7365fcSLi Xi 661e9be2ac7STheodore Ts'o #define EXT4_IOC_SHUTDOWN _IOR ('X', 125, __u32) 662783d9485STheodore Ts'o 663783d9485STheodore Ts'o /* 664783d9485STheodore Ts'o * Flags for going down operation 665783d9485STheodore Ts'o */ 666783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_DEFAULT 0x0 /* going down */ 667783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */ 668783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */ 669783d9485STheodore Ts'o 670783d9485STheodore Ts'o 671899ad0ceSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 6723dcf5451SChristoph Hellwig /* 6733dcf5451SChristoph Hellwig * ioctl commands in 32 bit emulation 6743dcf5451SChristoph Hellwig */ 6753dcf5451SChristoph Hellwig #define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS 6763dcf5451SChristoph Hellwig #define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS 6773dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) 6783dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) 6793dcf5451SChristoph Hellwig #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) 6803dcf5451SChristoph Hellwig #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) 6813dcf5451SChristoph Hellwig #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) 6824d92dc0fSBen Hutchings #define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input) 6833dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION 6843dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION 685899ad0ceSBen Hutchings #endif 6863dcf5451SChristoph Hellwig 687b595076aSUwe Kleine-König /* Max physical block we can address w/o extents */ 688fb0a387dSEric Sandeen #define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF 689fb0a387dSEric Sandeen 690bcd8e91fSTheodore Ts'o /* Max logical block we can support */ 691bcd8e91fSTheodore Ts'o #define EXT4_MAX_LOGICAL_BLOCK 0xFFFFFFFF 692bcd8e91fSTheodore Ts'o 6933dcf5451SChristoph Hellwig /* 6943dcf5451SChristoph Hellwig * Structure of an inode on the disk 6953dcf5451SChristoph Hellwig */ 6963dcf5451SChristoph Hellwig struct ext4_inode { 6973dcf5451SChristoph Hellwig __le16 i_mode; /* File mode */ 6983dcf5451SChristoph Hellwig __le16 i_uid; /* Low 16 bits of Owner Uid */ 6993dcf5451SChristoph Hellwig __le32 i_size_lo; /* Size in bytes */ 7003dcf5451SChristoph Hellwig __le32 i_atime; /* Access time */ 7013dcf5451SChristoph Hellwig __le32 i_ctime; /* Inode Change time */ 7023dcf5451SChristoph Hellwig __le32 i_mtime; /* Modification time */ 7033dcf5451SChristoph Hellwig __le32 i_dtime; /* Deletion Time */ 7043dcf5451SChristoph Hellwig __le16 i_gid; /* Low 16 bits of Group Id */ 7053dcf5451SChristoph Hellwig __le16 i_links_count; /* Links count */ 7063dcf5451SChristoph Hellwig __le32 i_blocks_lo; /* Blocks count */ 7073dcf5451SChristoph Hellwig __le32 i_flags; /* File flags */ 7083dcf5451SChristoph Hellwig union { 7093dcf5451SChristoph Hellwig struct { 7103dcf5451SChristoph Hellwig __le32 l_i_version; 7113dcf5451SChristoph Hellwig } linux1; 7123dcf5451SChristoph Hellwig struct { 7133dcf5451SChristoph Hellwig __u32 h_i_translator; 7143dcf5451SChristoph Hellwig } hurd1; 7153dcf5451SChristoph Hellwig struct { 7163dcf5451SChristoph Hellwig __u32 m_i_reserved1; 7173dcf5451SChristoph Hellwig } masix1; 7183dcf5451SChristoph Hellwig } osd1; /* OS dependent 1 */ 7193dcf5451SChristoph Hellwig __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ 7203dcf5451SChristoph Hellwig __le32 i_generation; /* File version (for NFS) */ 7213dcf5451SChristoph Hellwig __le32 i_file_acl_lo; /* File ACL */ 7223dcf5451SChristoph Hellwig __le32 i_size_high; 7233dcf5451SChristoph Hellwig __le32 i_obso_faddr; /* Obsoleted fragment address */ 7243dcf5451SChristoph Hellwig union { 7253dcf5451SChristoph Hellwig struct { 7263dcf5451SChristoph Hellwig __le16 l_i_blocks_high; /* were l_i_reserved1 */ 7273dcf5451SChristoph Hellwig __le16 l_i_file_acl_high; 7283dcf5451SChristoph Hellwig __le16 l_i_uid_high; /* these 2 fields */ 7293dcf5451SChristoph Hellwig __le16 l_i_gid_high; /* were reserved2[0] */ 730e6153918SDarrick J. Wong __le16 l_i_checksum_lo;/* crc32c(uuid+inum+inode) LE */ 731e6153918SDarrick J. Wong __le16 l_i_reserved; 7323dcf5451SChristoph Hellwig } linux2; 7333dcf5451SChristoph Hellwig struct { 7343dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 7353dcf5451SChristoph Hellwig __u16 h_i_mode_high; 7363dcf5451SChristoph Hellwig __u16 h_i_uid_high; 7373dcf5451SChristoph Hellwig __u16 h_i_gid_high; 7383dcf5451SChristoph Hellwig __u32 h_i_author; 7393dcf5451SChristoph Hellwig } hurd2; 7403dcf5451SChristoph Hellwig struct { 7413dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 7423dcf5451SChristoph Hellwig __le16 m_i_file_acl_high; 7433dcf5451SChristoph Hellwig __u32 m_i_reserved2[2]; 7443dcf5451SChristoph Hellwig } masix2; 7453dcf5451SChristoph Hellwig } osd2; /* OS dependent 2 */ 7463dcf5451SChristoph Hellwig __le16 i_extra_isize; 747e6153918SDarrick J. Wong __le16 i_checksum_hi; /* crc32c(uuid+inum+inode) BE */ 7483dcf5451SChristoph Hellwig __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ 7493dcf5451SChristoph Hellwig __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ 7503dcf5451SChristoph Hellwig __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ 7513dcf5451SChristoph Hellwig __le32 i_crtime; /* File Creation time */ 7523dcf5451SChristoph Hellwig __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ 7533dcf5451SChristoph Hellwig __le32 i_version_hi; /* high 32 bits for 64-bit version */ 7548b4953e1STheodore Ts'o __le32 i_projid; /* Project ID */ 7553dcf5451SChristoph Hellwig }; 7563dcf5451SChristoph Hellwig 757748de673SAkira Fujita struct move_extent { 758748de673SAkira Fujita __u32 reserved; /* should be zero */ 759748de673SAkira Fujita __u32 donor_fd; /* donor file descriptor */ 760748de673SAkira Fujita __u64 orig_start; /* logical start offset in block for orig */ 761748de673SAkira Fujita __u64 donor_start; /* logical start offset in block for donor */ 762748de673SAkira Fujita __u64 len; /* block length to be moved */ 763748de673SAkira Fujita __u64 moved_len; /* moved block length */ 764748de673SAkira Fujita }; 7653dcf5451SChristoph Hellwig 7663dcf5451SChristoph Hellwig #define EXT4_EPOCH_BITS 2 7673dcf5451SChristoph Hellwig #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) 7683dcf5451SChristoph Hellwig #define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) 7693dcf5451SChristoph Hellwig 7703dcf5451SChristoph Hellwig /* 7713dcf5451SChristoph Hellwig * Extended fields will fit into an inode if the filesystem was formatted 7723dcf5451SChristoph Hellwig * with large inodes (-I 256 or larger) and there are not currently any EAs 7733dcf5451SChristoph Hellwig * consuming all of the available space. For new inodes we always reserve 7743dcf5451SChristoph Hellwig * enough space for the kernel's known extended fields, but for inodes 7753dcf5451SChristoph Hellwig * created with an old kernel this might not have been the case. None of 7763dcf5451SChristoph Hellwig * the extended inode fields is critical for correct filesystem operation. 7773dcf5451SChristoph Hellwig * This macro checks if a certain field fits in the inode. Note that 7783dcf5451SChristoph Hellwig * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize 7793dcf5451SChristoph Hellwig */ 7803dcf5451SChristoph Hellwig #define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \ 7813dcf5451SChristoph Hellwig ((offsetof(typeof(*ext4_inode), field) + \ 7823dcf5451SChristoph Hellwig sizeof((ext4_inode)->field)) \ 7833dcf5451SChristoph Hellwig <= (EXT4_GOOD_OLD_INODE_SIZE + \ 7843dcf5451SChristoph Hellwig (einode)->i_extra_isize)) \ 7853dcf5451SChristoph Hellwig 786a4dad1aeSDavid Turner /* 787a4dad1aeSDavid Turner * We use an encoding that preserves the times for extra epoch "00": 788a4dad1aeSDavid Turner * 789a4dad1aeSDavid Turner * extra msb of adjust for signed 790a4dad1aeSDavid Turner * epoch 32-bit 32-bit tv_sec to 791a4dad1aeSDavid Turner * bits time decoded 64-bit tv_sec 64-bit tv_sec valid time range 792a4dad1aeSDavid Turner * 0 0 1 -0x80000000..-0x00000001 0x000000000 1901-12-13..1969-12-31 793a4dad1aeSDavid Turner * 0 0 0 0x000000000..0x07fffffff 0x000000000 1970-01-01..2038-01-19 794a4dad1aeSDavid Turner * 0 1 1 0x080000000..0x0ffffffff 0x100000000 2038-01-19..2106-02-07 795a4dad1aeSDavid Turner * 0 1 0 0x100000000..0x17fffffff 0x100000000 2106-02-07..2174-02-25 796a4dad1aeSDavid Turner * 1 0 1 0x180000000..0x1ffffffff 0x200000000 2174-02-25..2242-03-16 797a4dad1aeSDavid Turner * 1 0 0 0x200000000..0x27fffffff 0x200000000 2242-03-16..2310-04-04 798a4dad1aeSDavid Turner * 1 1 1 0x280000000..0x2ffffffff 0x300000000 2310-04-04..2378-04-22 799a4dad1aeSDavid Turner * 1 1 0 0x300000000..0x37fffffff 0x300000000 2378-04-22..2446-05-10 800a4dad1aeSDavid Turner * 801a4dad1aeSDavid Turner * Note that previous versions of the kernel on 64-bit systems would 802a4dad1aeSDavid Turner * incorrectly use extra epoch bits 1,1 for dates between 1901 and 803a4dad1aeSDavid Turner * 1970. e2fsck will correct this, assuming that it is run on the 804a4dad1aeSDavid Turner * affected filesystem before 2242. 805a4dad1aeSDavid Turner */ 806a4dad1aeSDavid Turner 8077b62b293SArnd Bergmann static inline __le32 ext4_encode_extra_time(struct timespec64 *time) 8083dcf5451SChristoph Hellwig { 8097b62b293SArnd Bergmann u32 extra =((time->tv_sec - (s32)time->tv_sec) >> 32) & EXT4_EPOCH_MASK; 810a4dad1aeSDavid Turner return cpu_to_le32(extra | (time->tv_nsec << EXT4_EPOCH_BITS)); 8113dcf5451SChristoph Hellwig } 8123dcf5451SChristoph Hellwig 8137b62b293SArnd Bergmann static inline void ext4_decode_extra_time(struct timespec64 *time, 8147b62b293SArnd Bergmann __le32 extra) 8153dcf5451SChristoph Hellwig { 8167b62b293SArnd Bergmann if (unlikely(extra & cpu_to_le32(EXT4_EPOCH_MASK))) { 817eaa093d2SChristoph Hellwig 818eaa093d2SChristoph Hellwig #if 1 819a4dad1aeSDavid Turner /* Handle legacy encoding of pre-1970 dates with epoch 820eaa093d2SChristoph Hellwig * bits 1,1. (This backwards compatibility may be removed 821eaa093d2SChristoph Hellwig * at the discretion of the ext4 developers.) 822a4dad1aeSDavid Turner */ 823a4dad1aeSDavid Turner u64 extra_bits = le32_to_cpu(extra) & EXT4_EPOCH_MASK; 824a4dad1aeSDavid Turner if (extra_bits == 3 && ((time->tv_sec) & 0x80000000) != 0) 825a4dad1aeSDavid Turner extra_bits = 0; 826a4dad1aeSDavid Turner time->tv_sec += extra_bits << 32; 827a4dad1aeSDavid Turner #else 828a4dad1aeSDavid Turner time->tv_sec += (u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32; 829a4dad1aeSDavid Turner #endif 830a4dad1aeSDavid Turner } 831c1fccc06STheodore Ts'o time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; 8323dcf5451SChristoph Hellwig } 8333dcf5451SChristoph Hellwig 8343dcf5451SChristoph Hellwig #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ 8353dcf5451SChristoph Hellwig do { \ 8363dcf5451SChristoph Hellwig (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ 83795582b00SDeepa Dinamani if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) {\ 8383dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 8397b62b293SArnd Bergmann ext4_encode_extra_time(&(inode)->xtime); \ 84095582b00SDeepa Dinamani } \ 8413dcf5451SChristoph Hellwig } while (0) 8423dcf5451SChristoph Hellwig 8433dcf5451SChristoph Hellwig #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ 8443dcf5451SChristoph Hellwig do { \ 8453dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 8463dcf5451SChristoph Hellwig (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \ 8473dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 8483dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 8493dcf5451SChristoph Hellwig ext4_encode_extra_time(&(einode)->xtime); \ 8503dcf5451SChristoph Hellwig } while (0) 8513dcf5451SChristoph Hellwig 8523dcf5451SChristoph Hellwig #define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \ 8533dcf5451SChristoph Hellwig do { \ 8543dcf5451SChristoph Hellwig (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \ 85595582b00SDeepa Dinamani if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) { \ 8567b62b293SArnd Bergmann ext4_decode_extra_time(&(inode)->xtime, \ 8573dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 85895582b00SDeepa Dinamani } \ 859af0b44a1SEric Sandeen else \ 860af0b44a1SEric Sandeen (inode)->xtime.tv_nsec = 0; \ 8613dcf5451SChristoph Hellwig } while (0) 8623dcf5451SChristoph Hellwig 86395582b00SDeepa Dinamani 8643dcf5451SChristoph Hellwig #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ 8653dcf5451SChristoph Hellwig do { \ 8663dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 8673dcf5451SChristoph Hellwig (einode)->xtime.tv_sec = \ 8683dcf5451SChristoph Hellwig (signed)le32_to_cpu((raw_inode)->xtime); \ 86919ea8060STheodore Ts'o else \ 87019ea8060STheodore Ts'o (einode)->xtime.tv_sec = 0; \ 8713dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 8723dcf5451SChristoph Hellwig ext4_decode_extra_time(&(einode)->xtime, \ 8733dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 874af0b44a1SEric Sandeen else \ 875af0b44a1SEric Sandeen (einode)->xtime.tv_nsec = 0; \ 8763dcf5451SChristoph Hellwig } while (0) 8773dcf5451SChristoph Hellwig 8783dcf5451SChristoph Hellwig #define i_disk_version osd1.linux1.l_i_version 8793dcf5451SChristoph Hellwig 8803dcf5451SChristoph Hellwig #if defined(__KERNEL__) || defined(__linux__) 8813dcf5451SChristoph Hellwig #define i_reserved1 osd1.linux1.l_i_reserved1 8823dcf5451SChristoph Hellwig #define i_file_acl_high osd2.linux2.l_i_file_acl_high 8833dcf5451SChristoph Hellwig #define i_blocks_high osd2.linux2.l_i_blocks_high 8843dcf5451SChristoph Hellwig #define i_uid_low i_uid 8853dcf5451SChristoph Hellwig #define i_gid_low i_gid 8863dcf5451SChristoph Hellwig #define i_uid_high osd2.linux2.l_i_uid_high 8873dcf5451SChristoph Hellwig #define i_gid_high osd2.linux2.l_i_gid_high 888e6153918SDarrick J. Wong #define i_checksum_lo osd2.linux2.l_i_checksum_lo 8893dcf5451SChristoph Hellwig 8903dcf5451SChristoph Hellwig #elif defined(__GNU__) 8913dcf5451SChristoph Hellwig 8923dcf5451SChristoph Hellwig #define i_translator osd1.hurd1.h_i_translator 8933dcf5451SChristoph Hellwig #define i_uid_high osd2.hurd2.h_i_uid_high 8943dcf5451SChristoph Hellwig #define i_gid_high osd2.hurd2.h_i_gid_high 8953dcf5451SChristoph Hellwig #define i_author osd2.hurd2.h_i_author 8963dcf5451SChristoph Hellwig 8973dcf5451SChristoph Hellwig #elif defined(__masix__) 8983dcf5451SChristoph Hellwig 8993dcf5451SChristoph Hellwig #define i_reserved1 osd1.masix1.m_i_reserved1 9003dcf5451SChristoph Hellwig #define i_file_acl_high osd2.masix2.m_i_file_acl_high 9013dcf5451SChristoph Hellwig #define i_reserved2 osd2.masix2.m_i_reserved2 9023dcf5451SChristoph Hellwig 9033dcf5451SChristoph Hellwig #endif /* defined(__KERNEL__) || defined(__linux__) */ 9043dcf5451SChristoph Hellwig 905c0677e6dSZheng Liu #include "extents_status.h" 906c0677e6dSZheng Liu 907d444c3c3STheodore Ts'o /* 908daf647d2STheodore Ts'o * Lock subclasses for i_data_sem in the ext4_inode_info structure. 909daf647d2STheodore Ts'o * 910daf647d2STheodore Ts'o * These are needed to avoid lockdep false positives when we need to 911daf647d2STheodore Ts'o * allocate blocks to the quota inode during ext4_map_blocks(), while 912daf647d2STheodore Ts'o * holding i_data_sem for a normal (non-quota) inode. Since we don't 913daf647d2STheodore Ts'o * do quota tracking for the quota inode, this avoids deadlock (as 914daf647d2STheodore Ts'o * well as infinite recursion, since it isn't turtles all the way 915daf647d2STheodore Ts'o * down...) 916daf647d2STheodore Ts'o * 917daf647d2STheodore Ts'o * I_DATA_SEM_NORMAL - Used for most inodes 918daf647d2STheodore Ts'o * I_DATA_SEM_OTHER - Used by move_inode.c for the second normal inode 919daf647d2STheodore Ts'o * where the second inode has larger inode number 920daf647d2STheodore Ts'o * than the first 921daf647d2STheodore Ts'o * I_DATA_SEM_QUOTA - Used for quota inodes only 922daf647d2STheodore Ts'o */ 923daf647d2STheodore Ts'o enum { 924daf647d2STheodore Ts'o I_DATA_SEM_NORMAL = 0, 925daf647d2STheodore Ts'o I_DATA_SEM_OTHER, 926daf647d2STheodore Ts'o I_DATA_SEM_QUOTA, 927daf647d2STheodore Ts'o }; 928daf647d2STheodore Ts'o 929daf647d2STheodore Ts'o 930daf647d2STheodore Ts'o /* 931d444c3c3STheodore Ts'o * fourth extended file system inode data in memory 932d444c3c3STheodore Ts'o */ 933d444c3c3STheodore Ts'o struct ext4_inode_info { 934d444c3c3STheodore Ts'o __le32 i_data[15]; /* unconverted */ 935d444c3c3STheodore Ts'o __u32 i_dtime; 93612e9b892SDmitry Monakhov ext4_fsblk_t i_file_acl; 937d444c3c3STheodore Ts'o 938d444c3c3STheodore Ts'o /* 939d444c3c3STheodore Ts'o * i_block_group is the number of the block group which contains 940d444c3c3STheodore Ts'o * this file's inode. Constant across the lifetime of the inode, 941a627b0a7SEric Whitney * it is used for making block allocation decisions - we try to 942d444c3c3STheodore Ts'o * place a file's data blocks near its inode block, and new inodes 943d444c3c3STheodore Ts'o * near to their parent directory's inode. 944d444c3c3STheodore Ts'o */ 945d444c3c3STheodore Ts'o ext4_group_t i_block_group; 9468a2005d3STheodore Ts'o ext4_lblk_t i_dir_start_lookup; 947353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 94819f5fb7aSTheodore Ts'o unsigned long i_state_flags; /* Dynamic state flags */ 949353eb83cSTheodore Ts'o #endif 95012e9b892SDmitry Monakhov unsigned long i_flags; 951d444c3c3STheodore Ts'o 952d444c3c3STheodore Ts'o /* 953d444c3c3STheodore Ts'o * Extended attributes can be read independently of the main file 954d444c3c3STheodore Ts'o * data. Taking i_mutex even when reading would cause contention 955d444c3c3STheodore Ts'o * between readers of EAs and writers of regular file data, so 956d444c3c3STheodore Ts'o * instead we synchronize on xattr_sem when reading or changing 957d444c3c3STheodore Ts'o * EAs. 958d444c3c3STheodore Ts'o */ 959d444c3c3STheodore Ts'o struct rw_semaphore xattr_sem; 960d444c3c3STheodore Ts'o 961d444c3c3STheodore Ts'o struct list_head i_orphan; /* unlinked but open inodes */ 962d444c3c3STheodore Ts'o 963d444c3c3STheodore Ts'o /* 964d444c3c3STheodore Ts'o * i_disksize keeps track of what the inode size is ON DISK, not 965d444c3c3STheodore Ts'o * in memory. During truncate, i_size is set to the new size by 966d444c3c3STheodore Ts'o * the VFS prior to calling ext4_truncate(), but the filesystem won't 967d444c3c3STheodore Ts'o * set i_disksize to 0 until the truncate is actually under way. 968d444c3c3STheodore Ts'o * 969d444c3c3STheodore Ts'o * The intent is that i_disksize always represents the blocks which 970d444c3c3STheodore Ts'o * are used by this file. This allows recovery to restart truncate 971d444c3c3STheodore Ts'o * on orphans if we crash during truncate. We actually write i_disksize 972d444c3c3STheodore Ts'o * into the on-disk inode when writing inodes out, instead of i_size. 973d444c3c3STheodore Ts'o * 974d444c3c3STheodore Ts'o * The only time when i_disksize and i_size may be different is when 975d444c3c3STheodore Ts'o * a truncate is in progress. The only things which change i_disksize 976d444c3c3STheodore Ts'o * are ext4_get_block (growth) and ext4_truncate (shrinkth). 977d444c3c3STheodore Ts'o */ 978d444c3c3STheodore Ts'o loff_t i_disksize; 979d444c3c3STheodore Ts'o 980d444c3c3STheodore Ts'o /* 981d444c3c3STheodore Ts'o * i_data_sem is for serialising ext4_truncate() against 982d444c3c3STheodore Ts'o * ext4_getblock(). In the 2.4 ext2 design, great chunks of inode's 983d444c3c3STheodore Ts'o * data tree are chopped off during truncate. We can't do that in 984d444c3c3STheodore Ts'o * ext4 because whenever we perform intermediate commits during 985d444c3c3STheodore Ts'o * truncate, the inode and all the metadata blocks *must* be in a 986d444c3c3STheodore Ts'o * consistent state which allows truncation of the orphans to restart 987d444c3c3STheodore Ts'o * during recovery. Hence we must fix the get_block-vs-truncate race 988d444c3c3STheodore Ts'o * by other means, so we have i_data_sem. 989d444c3c3STheodore Ts'o */ 990d444c3c3STheodore Ts'o struct rw_semaphore i_data_sem; 991ea3d7209SJan Kara /* 992ea3d7209SJan Kara * i_mmap_sem is for serializing page faults with truncate / punch hole 993ea3d7209SJan Kara * operations. We have to make sure that new page cannot be faulted in 994ea3d7209SJan Kara * a section of the inode that is being punched. We cannot easily use 995ea3d7209SJan Kara * i_data_sem for this since we need protection for the whole punch 996ea3d7209SJan Kara * operation and i_data_sem ranks below transaction start so we have 997ea3d7209SJan Kara * to occasionally drop it. 998ea3d7209SJan Kara */ 999ea3d7209SJan Kara struct rw_semaphore i_mmap_sem; 1000d444c3c3STheodore Ts'o struct inode vfs_inode; 10018aefcd55STheodore Ts'o struct jbd2_inode *jinode; 1002d444c3c3STheodore Ts'o 1003202ee5dfSTheodore Ts'o spinlock_t i_raw_lock; /* protects updates to the raw inode */ 1004202ee5dfSTheodore Ts'o 1005d444c3c3STheodore Ts'o /* 1006d444c3c3STheodore Ts'o * File creation time. Its function is same as that of 10077b62b293SArnd Bergmann * struct timespec64 i_{a,c,m}time in the generic inode. 1008d444c3c3STheodore Ts'o */ 10097b62b293SArnd Bergmann struct timespec64 i_crtime; 1010d444c3c3STheodore Ts'o 1011d444c3c3STheodore Ts'o /* mballoc */ 1012d444c3c3STheodore Ts'o struct list_head i_prealloc_list; 1013d444c3c3STheodore Ts'o spinlock_t i_prealloc_lock; 1014d444c3c3STheodore Ts'o 1015c0677e6dSZheng Liu /* extents status tree */ 1016c0677e6dSZheng Liu struct ext4_es_tree i_es_tree; 1017c0677e6dSZheng Liu rwlock_t i_es_lock; 1018edaa53caSZheng Liu struct list_head i_es_list; 1019eb68d0e2SZheng Liu unsigned int i_es_all_nr; /* protected by i_es_lock */ 1020edaa53caSZheng Liu unsigned int i_es_shk_nr; /* protected by i_es_lock */ 1021dd475925SJan Kara ext4_lblk_t i_es_shrink_lblk; /* Offset where we start searching for 1022dd475925SJan Kara extents to shrink. Protected by 1023dd475925SJan Kara i_es_lock */ 1024c0677e6dSZheng Liu 1025d444c3c3STheodore Ts'o /* ialloc */ 1026d444c3c3STheodore Ts'o ext4_group_t i_last_alloc_group; 1027d444c3c3STheodore Ts'o 1028d444c3c3STheodore Ts'o /* allocation reservation info for delalloc */ 1029a627b0a7SEric Whitney /* In case of bigalloc, this refer to clusters rather than blocks */ 1030d444c3c3STheodore Ts'o unsigned int i_reserved_data_blocks; 103101f49d0bSTheodore Ts'o ext4_lblk_t i_da_metadata_calc_last_lblock; 10329d0be502STheodore Ts'o int i_da_metadata_calc_len; 1033d444c3c3STheodore Ts'o 10341dc0aa46SEric Whitney /* pending cluster reservations for bigalloc file systems */ 10351dc0aa46SEric Whitney struct ext4_pending_tree i_pending_tree; 10361dc0aa46SEric Whitney 1037d444c3c3STheodore Ts'o /* on-disk additional length */ 1038d444c3c3STheodore Ts'o __u16 i_extra_isize; 1039d444c3c3STheodore Ts'o 104067cf5b09STao Ma /* Indicate the inline data space. */ 104167cf5b09STao Ma u16 i_inline_off; 104267cf5b09STao Ma u16 i_inline_size; 104367cf5b09STao Ma 1044a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1045a9e7f447SDmitry Monakhov /* quota space reservation, managed internally by quota code */ 1046a9e7f447SDmitry Monakhov qsize_t i_reserved_quota; 1047a9e7f447SDmitry Monakhov #endif 10488d5d02e6SMingming Cao 10492e8fa54eSJan Kara /* Lock protecting lists below */ 1050744692dcSJiaying Zhang spinlock_t i_completed_io_lock; 10512e8fa54eSJan Kara /* 10522e8fa54eSJan Kara * Completed IOs that need unwritten extents handling and have 10532e8fa54eSJan Kara * transaction reserved 10542e8fa54eSJan Kara */ 10552e8fa54eSJan Kara struct list_head i_rsv_conversion_list; 10562e8fa54eSJan Kara struct work_struct i_rsv_conversion_work; 1057600be30aSJan Kara atomic_t i_unwritten; /* Nr. of inflight conversions pending */ 10588a2005d3STheodore Ts'o 10598a2005d3STheodore Ts'o spinlock_t i_block_reservation_lock; 1060b436b9beSJan Kara 1061b436b9beSJan Kara /* 1062b436b9beSJan Kara * Transactions that contain inode's metadata needed to complete 1063b436b9beSJan Kara * fsync and fdatasync, respectively. 1064b436b9beSJan Kara */ 1065b436b9beSJan Kara tid_t i_sync_tid; 1066b436b9beSJan Kara tid_t i_datasync_tid; 1067814525f4SDarrick J. Wong 106896c7e0d9SJan Kara #ifdef CONFIG_QUOTA 106996c7e0d9SJan Kara struct dquot *i_dquot[MAXQUOTAS]; 107096c7e0d9SJan Kara #endif 107196c7e0d9SJan Kara 1072814525f4SDarrick J. Wong /* Precomputed uuid+inum+igen checksum for seeding inode checksums */ 1073814525f4SDarrick J. Wong __u32 i_csum_seed; 1074b30ab0e0SMichael Halcrow 1075040cb378SLi Xi kprojid_t i_projid; 1076d444c3c3STheodore Ts'o }; 1077d444c3c3STheodore Ts'o 1078d444c3c3STheodore Ts'o /* 10793dcf5451SChristoph Hellwig * File system states 10803dcf5451SChristoph Hellwig */ 10813dcf5451SChristoph Hellwig #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ 10823dcf5451SChristoph Hellwig #define EXT4_ERROR_FS 0x0002 /* Errors detected */ 10833dcf5451SChristoph Hellwig #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ 10843dcf5451SChristoph Hellwig 10853dcf5451SChristoph Hellwig /* 10863dcf5451SChristoph Hellwig * Misc. filesystem flags 10873dcf5451SChristoph Hellwig */ 10883dcf5451SChristoph Hellwig #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ 10893dcf5451SChristoph Hellwig #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ 10903dcf5451SChristoph Hellwig #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ 10913dcf5451SChristoph Hellwig 10923dcf5451SChristoph Hellwig /* 109368911009SLukas Czerner * Mount flags set via mount options or defaults 10943dcf5451SChristoph Hellwig */ 1095cdb7ee4cSTahsin Erdogan #define EXT4_MOUNT_NO_MBCACHE 0x00001 /* Do not use mbcache */ 10963dcf5451SChristoph Hellwig #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ 10973dcf5451SChristoph Hellwig #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ 10983dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ 10993dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ 11003dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ 110139ef17f1STheodore Ts'o #define EXT4_MOUNT_ERRORS_MASK 0x00070 11023dcf5451SChristoph Hellwig #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ 11033dcf5451SChristoph Hellwig #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ 1104923ae0ffSRoss Zwisler #ifdef CONFIG_FS_DAX 1105923ae0ffSRoss Zwisler #define EXT4_MOUNT_DAX 0x00200 /* Direct Access */ 1106923ae0ffSRoss Zwisler #else 1107923ae0ffSRoss Zwisler #define EXT4_MOUNT_DAX 0 1108923ae0ffSRoss Zwisler #endif 11093dcf5451SChristoph Hellwig #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ 11103dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ 11113dcf5451SChristoph Hellwig #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ 11123dcf5451SChristoph Hellwig #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ 11133dcf5451SChristoph Hellwig #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ 11143dcf5451SChristoph Hellwig #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ 11153dcf5451SChristoph Hellwig #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ 11163dcf5451SChristoph Hellwig #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ 1117afd4672dSTheodore Ts'o #define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000 /* No auto delalloc mapping */ 11183dcf5451SChristoph Hellwig #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ 111949da9392SJan Kara #define EXT4_MOUNT_QUOTA 0x40000 /* Some quota option set */ 112049da9392SJan Kara #define EXT4_MOUNT_USRQUOTA 0x80000 /* "old" user quota, 112149da9392SJan Kara * enable enforcement for hidden 112249da9392SJan Kara * quota files */ 112349da9392SJan Kara #define EXT4_MOUNT_GRPQUOTA 0x100000 /* "old" group quota, enable 112449da9392SJan Kara * enforcement for hidden quota 112549da9392SJan Kara * files */ 112649da9392SJan Kara #define EXT4_MOUNT_PRJQUOTA 0x200000 /* Enable project quota 112749da9392SJan Kara * enforcement */ 1128744692dcSJiaying Zhang #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */ 1129d4da6c9cSLinus Torvalds #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ 11303dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ 1131327eaf73STheodore Ts'o #define EXT4_MOUNT_WARN_ON_ERROR 0x2000000 /* Trigger WARN_ON on error */ 113264769240SAlex Tomas #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ 11335bf5683aSHidehiro Kawai #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ 11346fd058f7STheodore Ts'o #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ 11355328e635SEric Sandeen #define EXT4_MOUNT_DISCARD 0x40000000 /* Issue DISCARD requests */ 1136bfff6873SLukas Czerner #define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000 /* Initialize uninitialized itables */ 11375bf5683aSHidehiro Kawai 113868911009SLukas Czerner /* 113968911009SLukas Czerner * Mount flags set either automatically (could not be set by mount option) 114068911009SLukas Czerner * based on per file system feature or property or in special cases such as 114168911009SLukas Czerner * distinguishing between explicit mount option definition and default. 114268911009SLukas Czerner */ 114356889787STheodore Ts'o #define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001 /* User explicitly 114456889787STheodore Ts'o specified delalloc */ 114568911009SLukas Czerner #define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002 /* We have standard group 114668911009SLukas Czerner size of blocksize * 8 114768911009SLukas Czerner blocks */ 1148ed3654ebSTheodore Ts'o #define EXT4_MOUNT2_HURD_COMPAT 0x00000004 /* Support HURD-castrated 1149ed3654ebSTheodore Ts'o file systems */ 115056889787STheodore Ts'o 11511e381f60SDmitry Monakhov #define EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM 0x00000008 /* User explicitly 11521e381f60SDmitry Monakhov specified journal checksum */ 11531e381f60SDmitry Monakhov 1154fd8c37ecSTheodore Ts'o #define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \ 1155fd8c37ecSTheodore Ts'o ~EXT4_MOUNT_##opt 1156fd8c37ecSTheodore Ts'o #define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \ 1157fd8c37ecSTheodore Ts'o EXT4_MOUNT_##opt 11583dcf5451SChristoph Hellwig #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ 11593dcf5451SChristoph Hellwig EXT4_MOUNT_##opt) 11603dcf5451SChristoph Hellwig 1161a2595b8aSTheodore Ts'o #define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \ 1162a2595b8aSTheodore Ts'o ~EXT4_MOUNT2_##opt 1163a2595b8aSTheodore Ts'o #define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \ 1164a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt 1165a2595b8aSTheodore Ts'o #define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \ 1166a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt) 1167a2595b8aSTheodore Ts'o 1168597d508cSAkinobu Mita #define ext4_test_and_set_bit __test_and_set_bit_le 1169597d508cSAkinobu Mita #define ext4_set_bit __set_bit_le 11703dcf5451SChristoph Hellwig #define ext4_set_bit_atomic ext2_set_bit_atomic 1171597d508cSAkinobu Mita #define ext4_test_and_clear_bit __test_and_clear_bit_le 1172597d508cSAkinobu Mita #define ext4_clear_bit __clear_bit_le 11733dcf5451SChristoph Hellwig #define ext4_clear_bit_atomic ext2_clear_bit_atomic 117450e0168cSAkinobu Mita #define ext4_test_bit test_bit_le 117550e0168cSAkinobu Mita #define ext4_find_next_zero_bit find_next_zero_bit_le 117650e0168cSAkinobu Mita #define ext4_find_next_bit find_next_bit_le 11773dcf5451SChristoph Hellwig 1178c3e94d1dSYongqiang Yang extern void ext4_set_bits(void *bm, int cur, int len); 1179c3e94d1dSYongqiang Yang 11803dcf5451SChristoph Hellwig /* 11813dcf5451SChristoph Hellwig * Maximal mount counts between two filesystem checks 11823dcf5451SChristoph Hellwig */ 11833dcf5451SChristoph Hellwig #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ 11843dcf5451SChristoph Hellwig #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ 11853dcf5451SChristoph Hellwig 11863dcf5451SChristoph Hellwig /* 11873dcf5451SChristoph Hellwig * Behaviour when detecting errors 11883dcf5451SChristoph Hellwig */ 11893dcf5451SChristoph Hellwig #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ 11903dcf5451SChristoph Hellwig #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ 11913dcf5451SChristoph Hellwig #define EXT4_ERRORS_PANIC 3 /* Panic */ 11923dcf5451SChristoph Hellwig #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE 11933dcf5451SChristoph Hellwig 1194e6153918SDarrick J. Wong /* Metadata checksum algorithm codes */ 1195e6153918SDarrick J. Wong #define EXT4_CRC32C_CHKSUM 1 1196e6153918SDarrick J. Wong 11973dcf5451SChristoph Hellwig /* 11983dcf5451SChristoph Hellwig * Structure of the super block 11993dcf5451SChristoph Hellwig */ 12003dcf5451SChristoph Hellwig struct ext4_super_block { 12013dcf5451SChristoph Hellwig /*00*/ __le32 s_inodes_count; /* Inodes count */ 12023dcf5451SChristoph Hellwig __le32 s_blocks_count_lo; /* Blocks count */ 12033dcf5451SChristoph Hellwig __le32 s_r_blocks_count_lo; /* Reserved blocks count */ 12043dcf5451SChristoph Hellwig __le32 s_free_blocks_count_lo; /* Free blocks count */ 12053dcf5451SChristoph Hellwig /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ 12063dcf5451SChristoph Hellwig __le32 s_first_data_block; /* First Data Block */ 12073dcf5451SChristoph Hellwig __le32 s_log_block_size; /* Block size */ 1208281b5995STheodore Ts'o __le32 s_log_cluster_size; /* Allocation cluster size */ 12093dcf5451SChristoph Hellwig /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ 1210281b5995STheodore Ts'o __le32 s_clusters_per_group; /* # Clusters per group */ 12113dcf5451SChristoph Hellwig __le32 s_inodes_per_group; /* # Inodes per group */ 12123dcf5451SChristoph Hellwig __le32 s_mtime; /* Mount time */ 12133dcf5451SChristoph Hellwig /*30*/ __le32 s_wtime; /* Write time */ 12143dcf5451SChristoph Hellwig __le16 s_mnt_count; /* Mount count */ 12153dcf5451SChristoph Hellwig __le16 s_max_mnt_count; /* Maximal mount count */ 12163dcf5451SChristoph Hellwig __le16 s_magic; /* Magic signature */ 12173dcf5451SChristoph Hellwig __le16 s_state; /* File system state */ 12183dcf5451SChristoph Hellwig __le16 s_errors; /* Behaviour when detecting errors */ 12193dcf5451SChristoph Hellwig __le16 s_minor_rev_level; /* minor revision level */ 12203dcf5451SChristoph Hellwig /*40*/ __le32 s_lastcheck; /* time of last check */ 12213dcf5451SChristoph Hellwig __le32 s_checkinterval; /* max. time between checks */ 12223dcf5451SChristoph Hellwig __le32 s_creator_os; /* OS */ 12233dcf5451SChristoph Hellwig __le32 s_rev_level; /* Revision level */ 12243dcf5451SChristoph Hellwig /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ 12253dcf5451SChristoph Hellwig __le16 s_def_resgid; /* Default gid for reserved blocks */ 12263dcf5451SChristoph Hellwig /* 12273dcf5451SChristoph Hellwig * These fields are for EXT4_DYNAMIC_REV superblocks only. 12283dcf5451SChristoph Hellwig * 12293dcf5451SChristoph Hellwig * Note: the difference between the compatible feature set and 12303dcf5451SChristoph Hellwig * the incompatible feature set is that if there is a bit set 12313dcf5451SChristoph Hellwig * in the incompatible feature set that the kernel doesn't 12323dcf5451SChristoph Hellwig * know about, it should refuse to mount the filesystem. 12333dcf5451SChristoph Hellwig * 12343dcf5451SChristoph Hellwig * e2fsck's requirements are more strict; if it doesn't know 12353dcf5451SChristoph Hellwig * about a feature in either the compatible or incompatible 12363dcf5451SChristoph Hellwig * feature set, it must abort and not try to meddle with 12373dcf5451SChristoph Hellwig * things it doesn't understand... 12383dcf5451SChristoph Hellwig */ 12393dcf5451SChristoph Hellwig __le32 s_first_ino; /* First non-reserved inode */ 12403dcf5451SChristoph Hellwig __le16 s_inode_size; /* size of inode structure */ 12413dcf5451SChristoph Hellwig __le16 s_block_group_nr; /* block group # of this superblock */ 12423dcf5451SChristoph Hellwig __le32 s_feature_compat; /* compatible feature set */ 12433dcf5451SChristoph Hellwig /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ 12443dcf5451SChristoph Hellwig __le32 s_feature_ro_compat; /* readonly-compatible feature set */ 12453dcf5451SChristoph Hellwig /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ 12463dcf5451SChristoph Hellwig /*78*/ char s_volume_name[16]; /* volume name */ 1247072ebb3bSTheodore Ts'o /*88*/ char s_last_mounted[64] __nonstring; /* directory where last mounted */ 12483dcf5451SChristoph Hellwig /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ 12493dcf5451SChristoph Hellwig /* 12503dcf5451SChristoph Hellwig * Performance hints. Directory preallocation should only 12513dcf5451SChristoph Hellwig * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. 12523dcf5451SChristoph Hellwig */ 12533dcf5451SChristoph Hellwig __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 12543dcf5451SChristoph Hellwig __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 12553dcf5451SChristoph Hellwig __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ 12563dcf5451SChristoph Hellwig /* 12573dcf5451SChristoph Hellwig * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. 12583dcf5451SChristoph Hellwig */ 12593dcf5451SChristoph Hellwig /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 12603dcf5451SChristoph Hellwig /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ 12613dcf5451SChristoph Hellwig __le32 s_journal_dev; /* device number of journal file */ 12623dcf5451SChristoph Hellwig __le32 s_last_orphan; /* start of list of inodes to delete */ 12633dcf5451SChristoph Hellwig __le32 s_hash_seed[4]; /* HTREE hash seed */ 12643dcf5451SChristoph Hellwig __u8 s_def_hash_version; /* Default hash version to use */ 126589eeddf0STheodore Ts'o __u8 s_jnl_backup_type; 12663dcf5451SChristoph Hellwig __le16 s_desc_size; /* size of group descriptor */ 12673dcf5451SChristoph Hellwig /*100*/ __le32 s_default_mount_opts; 12683dcf5451SChristoph Hellwig __le32 s_first_meta_bg; /* First metablock block group */ 12693dcf5451SChristoph Hellwig __le32 s_mkfs_time; /* When the filesystem was created */ 12703dcf5451SChristoph Hellwig __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ 12713dcf5451SChristoph Hellwig /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ 12723dcf5451SChristoph Hellwig /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ 12733dcf5451SChristoph Hellwig __le32 s_r_blocks_count_hi; /* Reserved blocks count */ 12743dcf5451SChristoph Hellwig __le32 s_free_blocks_count_hi; /* Free blocks count */ 12753dcf5451SChristoph Hellwig __le16 s_min_extra_isize; /* All inodes have at least # bytes */ 12763dcf5451SChristoph Hellwig __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ 12773dcf5451SChristoph Hellwig __le32 s_flags; /* Miscellaneous flags */ 12783dcf5451SChristoph Hellwig __le16 s_raid_stride; /* RAID stride */ 1279c5e06d10SJohann Lombardi __le16 s_mmp_update_interval; /* # seconds to wait in MMP checking */ 12803dcf5451SChristoph Hellwig __le64 s_mmp_block; /* Block for multi-mount protection */ 12813dcf5451SChristoph Hellwig __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ 1282772cb7c8SJose R. Santos __u8 s_log_groups_per_flex; /* FLEX_BG group size */ 1283e6153918SDarrick J. Wong __u8 s_checksum_type; /* metadata checksum algorithm used */ 1284f542fbe8STheodore Ts'o __u8 s_encryption_level; /* versioning level for encryption */ 1285f542fbe8STheodore Ts'o __u8 s_reserved_pad; /* Padding to next 32bits */ 1286afc32f7eSTheodore Ts'o __le64 s_kbytes_written; /* nr of lifetime kilobytes written */ 12874a9cdec7STheodore Ts'o __le32 s_snapshot_inum; /* Inode number of active snapshot */ 12884a9cdec7STheodore Ts'o __le32 s_snapshot_id; /* sequential ID of active snapshot */ 12894a9cdec7STheodore Ts'o __le64 s_snapshot_r_blocks_count; /* reserved blocks for active 12904a9cdec7STheodore Ts'o snapshot's future use */ 12914a9cdec7STheodore Ts'o __le32 s_snapshot_list; /* inode number of the head of the 12924a9cdec7STheodore Ts'o on-disk snapshot list */ 12931c13d5c0STheodore Ts'o #define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count) 12941c13d5c0STheodore Ts'o __le32 s_error_count; /* number of fs errors */ 12951c13d5c0STheodore Ts'o __le32 s_first_error_time; /* first time an error happened */ 12961c13d5c0STheodore Ts'o __le32 s_first_error_ino; /* inode involved in first error */ 12971c13d5c0STheodore Ts'o __le64 s_first_error_block; /* block involved of first error */ 1298072ebb3bSTheodore Ts'o __u8 s_first_error_func[32] __nonstring; /* function where the error happened */ 12991c13d5c0STheodore Ts'o __le32 s_first_error_line; /* line number where error happened */ 13001c13d5c0STheodore Ts'o __le32 s_last_error_time; /* most recent time of an error */ 13011c13d5c0STheodore Ts'o __le32 s_last_error_ino; /* inode involved in last error */ 13021c13d5c0STheodore Ts'o __le32 s_last_error_line; /* line number where error happened */ 13031c13d5c0STheodore Ts'o __le64 s_last_error_block; /* block involved of last error */ 1304072ebb3bSTheodore Ts'o __u8 s_last_error_func[32] __nonstring; /* function where the error happened */ 13058b67f04aSTheodore Ts'o #define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts) 13068b67f04aSTheodore Ts'o __u8 s_mount_opts[64]; 1307281b5995STheodore Ts'o __le32 s_usr_quota_inum; /* inode for tracking user quota */ 1308281b5995STheodore Ts'o __le32 s_grp_quota_inum; /* inode for tracking group quota */ 1309281b5995STheodore Ts'o __le32 s_overhead_clusters; /* overhead blocks/clusters in fs */ 13101beeef1bSDarrick J. Wong __le32 s_backup_bgs[2]; /* groups with sparse_super2 SBs */ 13113edc18d8STheodore Ts'o __u8 s_encrypt_algos[4]; /* Encryption algorithms in use */ 1312f542fbe8STheodore Ts'o __u8 s_encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ 1313f542fbe8STheodore Ts'o __le32 s_lpf_ino; /* Location of the lost+found inode */ 13148b4953e1STheodore Ts'o __le32 s_prj_quota_inum; /* inode for tracking project quota */ 13158c81bd8fSDarrick J. Wong __le32 s_checksum_seed; /* crc32c(uuid) if csum_seed set */ 13166a0678a7SArnd Bergmann __u8 s_wtime_hi; 13176a0678a7SArnd Bergmann __u8 s_mtime_hi; 13186a0678a7SArnd Bergmann __u8 s_mkfs_time_hi; 13196a0678a7SArnd Bergmann __u8 s_lastcheck_hi; 13206a0678a7SArnd Bergmann __u8 s_first_error_time_hi; 13216a0678a7SArnd Bergmann __u8 s_last_error_time_hi; 13226a0678a7SArnd Bergmann __u8 s_pad[2]; 13236a0678a7SArnd Bergmann __le32 s_reserved[96]; /* Padding to the end of the block */ 1324e6153918SDarrick J. Wong __le32 s_checksum; /* crc32c(superblock) */ 13253dcf5451SChristoph Hellwig }; 13263dcf5451SChristoph Hellwig 13271c13d5c0STheodore Ts'o #define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START) 13281c13d5c0STheodore Ts'o 13293dcf5451SChristoph Hellwig #ifdef __KERNEL__ 1330bc0b0d6dSTheodore Ts'o 1331bc0b0d6dSTheodore Ts'o /* 13324ab2f15bSTheodore Ts'o * run-time mount flags 1333bc0b0d6dSTheodore Ts'o */ 1334bc0b0d6dSTheodore Ts'o #define EXT4_MF_MNTDIR_SAMPLED 0x0001 13354ab2f15bSTheodore Ts'o #define EXT4_MF_FS_ABORTED 0x0002 /* Fatal error detected */ 13366ddb2447STheodore Ts'o #define EXT4_MF_TEST_DUMMY_ENCRYPTION 0x0004 13376ddb2447STheodore Ts'o 13386ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 13396ddb2447STheodore Ts'o #define DUMMY_ENCRYPTION_ENABLED(sbi) (unlikely((sbi)->s_mount_flags & \ 13406ddb2447STheodore Ts'o EXT4_MF_TEST_DUMMY_ENCRYPTION)) 13416ddb2447STheodore Ts'o #else 13426ddb2447STheodore Ts'o #define DUMMY_ENCRYPTION_ENABLED(sbi) (0) 13436ddb2447STheodore Ts'o #endif 1344bc0b0d6dSTheodore Ts'o 1345a2d4a646SJan Kara /* Number of quota types we support */ 1346689c958cSLi Xi #define EXT4_MAXQUOTAS 3 1347a2d4a646SJan Kara 1348ca0faba0STheodore Ts'o /* 1349ca0faba0STheodore Ts'o * fourth extended-fs super-block data in memory 1350ca0faba0STheodore Ts'o */ 1351ca0faba0STheodore Ts'o struct ext4_sb_info { 1352ca0faba0STheodore Ts'o unsigned long s_desc_size; /* Size of a group descriptor in bytes */ 1353ca0faba0STheodore Ts'o unsigned long s_inodes_per_block;/* Number of inodes per block */ 1354ca0faba0STheodore Ts'o unsigned long s_blocks_per_group;/* Number of blocks in a group */ 1355281b5995STheodore Ts'o unsigned long s_clusters_per_group; /* Number of clusters in a group */ 1356ca0faba0STheodore Ts'o unsigned long s_inodes_per_group;/* Number of inodes in a group */ 1357ca0faba0STheodore Ts'o unsigned long s_itb_per_group; /* Number of inode table blocks per group */ 1358ca0faba0STheodore Ts'o unsigned long s_gdb_count; /* Number of group descriptor blocks */ 1359ca0faba0STheodore Ts'o unsigned long s_desc_per_block; /* Number of group descriptors per block */ 1360ca0faba0STheodore Ts'o ext4_group_t s_groups_count; /* Number of groups in the fs */ 1361fb0a387dSEric Sandeen ext4_group_t s_blockfile_groups;/* Groups acceptable for non-extent files */ 1362952fc18eSTheodore Ts'o unsigned long s_overhead; /* # of fs overhead clusters */ 1363281b5995STheodore Ts'o unsigned int s_cluster_ratio; /* Number of blocks per cluster */ 1364281b5995STheodore Ts'o unsigned int s_cluster_bits; /* log2 of s_cluster_ratio */ 1365ca0faba0STheodore Ts'o loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ 1366ca0faba0STheodore Ts'o struct buffer_head * s_sbh; /* Buffer containing the super block */ 1367ca0faba0STheodore Ts'o struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ 1368ca0faba0STheodore Ts'o struct buffer_head **s_group_desc; 13697f4520ccSTheodore Ts'o unsigned int s_mount_opt; 1370a2595b8aSTheodore Ts'o unsigned int s_mount_opt2; 1371bc0b0d6dSTheodore Ts'o unsigned int s_mount_flags; 13725a916be1STheodore Ts'o unsigned int s_def_mount_opt; 1373ca0faba0STheodore Ts'o ext4_fsblk_t s_sb_block; 137427dd4385SLukas Czerner atomic64_t s_resv_clusters; 137508cefc7aSEric W. Biederman kuid_t s_resuid; 137608cefc7aSEric W. Biederman kgid_t s_resgid; 1377ca0faba0STheodore Ts'o unsigned short s_mount_state; 1378ca0faba0STheodore Ts'o unsigned short s_pad; 1379ca0faba0STheodore Ts'o int s_addr_per_block_bits; 1380ca0faba0STheodore Ts'o int s_desc_per_block_bits; 1381ca0faba0STheodore Ts'o int s_inode_size; 1382ca0faba0STheodore Ts'o int s_first_ino; 1383ca0faba0STheodore Ts'o unsigned int s_inode_readahead_blks; 138411013911SAndreas Dilger unsigned int s_inode_goal; 1385ca0faba0STheodore Ts'o u32 s_hash_seed[4]; 1386ca0faba0STheodore Ts'o int s_def_hash_version; 1387ca0faba0STheodore Ts'o int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */ 138857042651STheodore Ts'o struct percpu_counter s_freeclusters_counter; 1389ca0faba0STheodore Ts'o struct percpu_counter s_freeinodes_counter; 1390ca0faba0STheodore Ts'o struct percpu_counter s_dirs_counter; 139157042651STheodore Ts'o struct percpu_counter s_dirtyclusters_counter; 1392ca0faba0STheodore Ts'o struct blockgroup_lock *s_blockgroup_lock; 1393ca0faba0STheodore Ts'o struct proc_dir_entry *s_proc; 1394ca0faba0STheodore Ts'o struct kobject s_kobj; 1395ca0faba0STheodore Ts'o struct completion s_kobj_unregister; 13962c0544b2STheodore Ts'o struct super_block *s_sb; 1397ca0faba0STheodore Ts'o 1398ca0faba0STheodore Ts'o /* Journaling */ 1399ca0faba0STheodore Ts'o struct journal_s *s_journal; 1400ca0faba0STheodore Ts'o struct list_head s_orphan; 1401ca0faba0STheodore Ts'o struct mutex s_orphan_lock; 14029549a168STheodore Ts'o unsigned long s_ext4_flags; /* Ext4 superblock flags */ 1403ca0faba0STheodore Ts'o unsigned long s_commit_interval; 1404ca0faba0STheodore Ts'o u32 s_max_batch_time; 1405ca0faba0STheodore Ts'o u32 s_min_batch_time; 1406ca0faba0STheodore Ts'o struct block_device *journal_bdev; 1407ca0faba0STheodore Ts'o #ifdef CONFIG_QUOTA 140833458eabSTheodore Ts'o /* Names of quota files with journalled quota */ 140933458eabSTheodore Ts'o char __rcu *s_qf_names[EXT4_MAXQUOTAS]; 1410ca0faba0STheodore Ts'o int s_jquota_fmt; /* Format of quota to use */ 1411ca0faba0STheodore Ts'o #endif 1412ca0faba0STheodore Ts'o unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ 14136fd058f7STheodore Ts'o struct rb_root system_blks; 1414ca0faba0STheodore Ts'o 1415ca0faba0STheodore Ts'o #ifdef EXTENTS_STATS 1416ca0faba0STheodore Ts'o /* ext4 extents stats */ 1417ca0faba0STheodore Ts'o unsigned long s_ext_min; 1418ca0faba0STheodore Ts'o unsigned long s_ext_max; 1419ca0faba0STheodore Ts'o unsigned long s_depth_max; 1420ca0faba0STheodore Ts'o spinlock_t s_ext_stats_lock; 1421ca0faba0STheodore Ts'o unsigned long s_ext_blocks; 1422ca0faba0STheodore Ts'o unsigned long s_ext_extents; 1423ca0faba0STheodore Ts'o #endif 1424ca0faba0STheodore Ts'o 1425ca0faba0STheodore Ts'o /* for buddy allocator */ 1426ca0faba0STheodore Ts'o struct ext4_group_info ***s_group_info; 1427ca0faba0STheodore Ts'o struct inode *s_buddy_cache; 1428ca0faba0STheodore Ts'o spinlock_t s_md_lock; 1429ca0faba0STheodore Ts'o unsigned short *s_mb_offsets; 1430ca0faba0STheodore Ts'o unsigned int *s_mb_maxs; 143128623c2fSTheodore Ts'o unsigned int s_group_info_size; 1432d08854f5STheodore Ts'o unsigned int s_mb_free_pending; 1433a0154344SDaeho Jeong struct list_head s_freed_data_list; /* List of blocks to be freed 1434a0154344SDaeho Jeong after commit completed */ 1435ca0faba0STheodore Ts'o 1436ca0faba0STheodore Ts'o /* tunables */ 1437ca0faba0STheodore Ts'o unsigned long s_stripe; 1438ca0faba0STheodore Ts'o unsigned int s_mb_stream_request; 1439ca0faba0STheodore Ts'o unsigned int s_mb_max_to_scan; 1440ca0faba0STheodore Ts'o unsigned int s_mb_min_to_scan; 1441ca0faba0STheodore Ts'o unsigned int s_mb_stats; 1442ca0faba0STheodore Ts'o unsigned int s_mb_order2_reqs; 1443ca0faba0STheodore Ts'o unsigned int s_mb_group_prealloc; 1444df981d03STheodore Ts'o unsigned int s_max_dir_size_kb; 1445ca0faba0STheodore Ts'o /* where last allocation was done - for stream allocation */ 1446ca0faba0STheodore Ts'o unsigned long s_mb_last_group; 1447ca0faba0STheodore Ts'o unsigned long s_mb_last_start; 1448ca0faba0STheodore Ts'o 1449ca0faba0STheodore Ts'o /* stats for buddy allocator */ 1450ca0faba0STheodore Ts'o atomic_t s_bal_reqs; /* number of reqs with len > 1 */ 1451ca0faba0STheodore Ts'o atomic_t s_bal_success; /* we found long enough chunks */ 1452ca0faba0STheodore Ts'o atomic_t s_bal_allocated; /* in blocks */ 1453ca0faba0STheodore Ts'o atomic_t s_bal_ex_scanned; /* total extents scanned */ 1454ca0faba0STheodore Ts'o atomic_t s_bal_goals; /* goal hits */ 1455ca0faba0STheodore Ts'o atomic_t s_bal_breaks; /* too long searches */ 1456ca0faba0STheodore Ts'o atomic_t s_bal_2orders; /* 2^order hits */ 1457ca0faba0STheodore Ts'o spinlock_t s_bal_lock; 1458ca0faba0STheodore Ts'o unsigned long s_mb_buddies_generated; 1459ca0faba0STheodore Ts'o unsigned long long s_mb_generation_time; 1460ca0faba0STheodore Ts'o atomic_t s_mb_lost_chunks; 1461ca0faba0STheodore Ts'o atomic_t s_mb_preallocated; 1462ca0faba0STheodore Ts'o atomic_t s_mb_discarded; 146350797481STheodore Ts'o atomic_t s_lock_busy; 1464ca0faba0STheodore Ts'o 1465ca0faba0STheodore Ts'o /* locality groups */ 1466003cb608STejun Heo struct ext4_locality_group __percpu *s_locality_groups; 1467ca0faba0STheodore Ts'o 1468ca0faba0STheodore Ts'o /* for write statistics */ 1469ca0faba0STheodore Ts'o unsigned long s_sectors_written_start; 1470ca0faba0STheodore Ts'o u64 s_kbytes_written; 1471ca0faba0STheodore Ts'o 147267a5da56SZheng Liu /* the size of zero-out chunk */ 147367a5da56SZheng Liu unsigned int s_extent_max_zeroout_kb; 147467a5da56SZheng Liu 1475ca0faba0STheodore Ts'o unsigned int s_log_groups_per_flex; 1476ca0faba0STheodore Ts'o struct flex_groups *s_flex_groups; 1477117fff10STheodore Ts'o ext4_group_t s_flex_groups_allocated; 14784c0425ffSMingming Cao 14792e8fa54eSJan Kara /* workqueue for reserved extent conversions (buffered io) */ 14802e8fa54eSJan Kara struct workqueue_struct *rsv_conversion_wq; 148166e61a9eSTheodore Ts'o 148266e61a9eSTheodore Ts'o /* timer for periodic error stats printing */ 148366e61a9eSTheodore Ts'o struct timer_list s_err_report; 1484bfff6873SLukas Czerner 1485bfff6873SLukas Czerner /* Lazy inode table initialization info */ 1486bfff6873SLukas Czerner struct ext4_li_request *s_li_request; 1487bfff6873SLukas Czerner /* Wait multiplier for lazy initialization thread */ 1488bfff6873SLukas Czerner unsigned int s_li_wait_mult; 1489c5e06d10SJohann Lombardi 1490c5e06d10SJohann Lombardi /* Kernel thread for multiple mount protection */ 1491c5e06d10SJohann Lombardi struct task_struct *s_mmp_tsk; 14923d56b8d2STao Ma 14933d56b8d2STao Ma /* record the last minlen when FITRIM is called. */ 14943d56b8d2STao Ma atomic_t s_last_trim_minblks; 14950441984aSDarrick J. Wong 14960441984aSDarrick J. Wong /* Reference to checksum algorithm driver via cryptoapi */ 14970441984aSDarrick J. Wong struct crypto_shash *s_chksum_driver; 1498a9c47317SDarrick J. Wong 1499a9c47317SDarrick J. Wong /* Precomputed FS UUID checksum for seeding other checksums */ 1500a9c47317SDarrick J. Wong __u32 s_csum_seed; 150174cd15cdSZheng Liu 150274cd15cdSZheng Liu /* Reclaim extents from extent status tree */ 150374cd15cdSZheng Liu struct shrinker s_es_shrinker; 1504dd475925SJan Kara struct list_head s_es_list; /* List of inodes with reclaimable extents */ 1505edaa53caSZheng Liu long s_es_nr_inode; 1506eb68d0e2SZheng Liu struct ext4_es_stats s_es_stats; 150747387409STahsin Erdogan struct mb_cache *s_ea_block_cache; 1508dec214d0STahsin Erdogan struct mb_cache *s_ea_inode_cache; 1509edaa53caSZheng Liu spinlock_t s_es_lock ____cacheline_aligned_in_smp; 1510efbed4dcSTheodore Ts'o 1511efbed4dcSTheodore Ts'o /* Ratelimit ext4 messages. */ 1512efbed4dcSTheodore Ts'o struct ratelimit_state s_err_ratelimit_state; 1513efbed4dcSTheodore Ts'o struct ratelimit_state s_warning_ratelimit_state; 1514efbed4dcSTheodore Ts'o struct ratelimit_state s_msg_ratelimit_state; 1515c8585c6fSDaeho Jeong 1516c8585c6fSDaeho Jeong /* Barrier between changing inodes' journal flags and writepages ops. */ 1517c8585c6fSDaeho Jeong struct percpu_rw_semaphore s_journal_flag_rwsem; 15185e405595SDan Williams struct dax_device *s_daxdev; 1519ca0faba0STheodore Ts'o }; 1520ca0faba0STheodore Ts'o 15213dcf5451SChristoph Hellwig static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) 15223dcf5451SChristoph Hellwig { 15233dcf5451SChristoph Hellwig return sb->s_fs_info; 15243dcf5451SChristoph Hellwig } 15253dcf5451SChristoph Hellwig static inline struct ext4_inode_info *EXT4_I(struct inode *inode) 15263dcf5451SChristoph Hellwig { 15273dcf5451SChristoph Hellwig return container_of(inode, struct ext4_inode_info, vfs_inode); 15283dcf5451SChristoph Hellwig } 15293dcf5451SChristoph Hellwig 15303dcf5451SChristoph Hellwig static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) 15313dcf5451SChristoph Hellwig { 15323dcf5451SChristoph Hellwig return ino == EXT4_ROOT_INO || 15333dcf5451SChristoph Hellwig (ino >= EXT4_FIRST_INO(sb) && 15343dcf5451SChristoph Hellwig ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); 15353dcf5451SChristoph Hellwig } 153619f5fb7aSTheodore Ts'o 153719f5fb7aSTheodore Ts'o /* 153819f5fb7aSTheodore Ts'o * Inode dynamic state flags 153919f5fb7aSTheodore Ts'o */ 154019f5fb7aSTheodore Ts'o enum { 154119f5fb7aSTheodore Ts'o EXT4_STATE_JDATA, /* journaled data exists */ 154219f5fb7aSTheodore Ts'o EXT4_STATE_NEW, /* inode is newly created */ 154319f5fb7aSTheodore Ts'o EXT4_STATE_XATTR, /* has in-inode xattrs */ 154419f5fb7aSTheodore Ts'o EXT4_STATE_NO_EXPAND, /* No space for expansion */ 154519f5fb7aSTheodore Ts'o EXT4_STATE_DA_ALLOC_CLOSE, /* Alloc DA blks on close */ 154619f5fb7aSTheodore Ts'o EXT4_STATE_EXT_MIGRATE, /* Inode is migrating */ 154719f5fb7aSTheodore Ts'o EXT4_STATE_DIO_UNWRITTEN, /* need convert on dio done*/ 154814ece102SFrank Mayhar EXT4_STATE_NEWENTRY, /* File just added to dir */ 154967cf5b09STao Ma EXT4_STATE_MAY_INLINE_DATA, /* may have in-inode data */ 15507869a4a6STheodore Ts'o EXT4_STATE_EXT_PRECACHED, /* extents have been precached */ 1551a6d05676STahsin Erdogan EXT4_STATE_LUSTRE_EA_INODE, /* Lustre-style ea_inode */ 155219f5fb7aSTheodore Ts'o }; 155319f5fb7aSTheodore Ts'o 1554353eb83cSTheodore Ts'o #define EXT4_INODE_BIT_FNS(name, field, offset) \ 155512e9b892SDmitry Monakhov static inline int ext4_test_inode_##name(struct inode *inode, int bit) \ 155612e9b892SDmitry Monakhov { \ 1557353eb83cSTheodore Ts'o return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 155812e9b892SDmitry Monakhov } \ 155912e9b892SDmitry Monakhov static inline void ext4_set_inode_##name(struct inode *inode, int bit) \ 156012e9b892SDmitry Monakhov { \ 1561353eb83cSTheodore Ts'o set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 156212e9b892SDmitry Monakhov } \ 156312e9b892SDmitry Monakhov static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \ 156412e9b892SDmitry Monakhov { \ 1565353eb83cSTheodore Ts'o clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 156619f5fb7aSTheodore Ts'o } 156719f5fb7aSTheodore Ts'o 15683f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 15693f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 15703f61c0ccSAndreas Dilger static inline int ext4_test_inode_flag(struct inode *inode, int bit); 15713f61c0ccSAndreas Dilger static inline void ext4_set_inode_flag(struct inode *inode, int bit); 15723f61c0ccSAndreas Dilger static inline void ext4_clear_inode_flag(struct inode *inode, int bit); 1573353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(flag, flags, 0) 15743f61c0ccSAndreas Dilger 15753f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 15763f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 15773f61c0ccSAndreas Dilger static inline int ext4_test_inode_state(struct inode *inode, int bit); 15783f61c0ccSAndreas Dilger static inline void ext4_set_inode_state(struct inode *inode, int bit); 15793f61c0ccSAndreas Dilger static inline void ext4_clear_inode_state(struct inode *inode, int bit); 1580353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 1581353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, state_flags, 0) 1582353eb83cSTheodore Ts'o 1583353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1584353eb83cSTheodore Ts'o { 1585353eb83cSTheodore Ts'o (ei)->i_state_flags = 0; 1586353eb83cSTheodore Ts'o } 1587353eb83cSTheodore Ts'o #else 1588353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, flags, 32) 1589353eb83cSTheodore Ts'o 1590353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1591353eb83cSTheodore Ts'o { 1592353eb83cSTheodore Ts'o /* We depend on the fact that callers will set i_flags */ 1593353eb83cSTheodore Ts'o } 1594353eb83cSTheodore Ts'o #endif 15953dcf5451SChristoph Hellwig #else 15963dcf5451SChristoph Hellwig /* Assume that user mode programs are passing in an ext4fs superblock, not 15973dcf5451SChristoph Hellwig * a kernel struct super_block. This will allow us to call the feature-test 15983dcf5451SChristoph Hellwig * macros from user land. */ 15993dcf5451SChristoph Hellwig #define EXT4_SB(sb) (sb) 16003dcf5451SChristoph Hellwig #endif 16013dcf5451SChristoph Hellwig 1602b30ab0e0SMichael Halcrow /* 1603b30ab0e0SMichael Halcrow * Returns true if the inode is inode is encrypted 1604b30ab0e0SMichael Halcrow */ 16053dcf5451SChristoph Hellwig #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime 16063dcf5451SChristoph Hellwig 16073dcf5451SChristoph Hellwig /* 16083dcf5451SChristoph Hellwig * Codes for operating systems 16093dcf5451SChristoph Hellwig */ 16103dcf5451SChristoph Hellwig #define EXT4_OS_LINUX 0 16113dcf5451SChristoph Hellwig #define EXT4_OS_HURD 1 16123dcf5451SChristoph Hellwig #define EXT4_OS_MASIX 2 16133dcf5451SChristoph Hellwig #define EXT4_OS_FREEBSD 3 16143dcf5451SChristoph Hellwig #define EXT4_OS_LITES 4 16153dcf5451SChristoph Hellwig 16163dcf5451SChristoph Hellwig /* 16173dcf5451SChristoph Hellwig * Revision levels 16183dcf5451SChristoph Hellwig */ 16193dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ 16203dcf5451SChristoph Hellwig #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ 16213dcf5451SChristoph Hellwig 16223dcf5451SChristoph Hellwig #define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV 16233dcf5451SChristoph Hellwig #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV 16243dcf5451SChristoph Hellwig 16253dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_INODE_SIZE 128 16263dcf5451SChristoph Hellwig 16273dcf5451SChristoph Hellwig /* 16283dcf5451SChristoph Hellwig * Feature set definitions 16293dcf5451SChristoph Hellwig */ 16303dcf5451SChristoph Hellwig 16313dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 16323dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 16333dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 16343dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 16353dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 16363dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 16371beeef1bSDarrick J. Wong #define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200 16383dcf5451SChristoph Hellwig 16393dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 16403dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 16413dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 16423dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 16433dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 16443dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 16453dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 1646ae812306SAditya Kali #define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100 1647281b5995STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200 1648e6153918SDarrick J. Wong /* 1649e6153918SDarrick J. Wong * METADATA_CSUM also enables group descriptor checksums (GDT_CSUM). When 1650e6153918SDarrick J. Wong * METADATA_CSUM is set, group descriptor checksums use the same algorithm as 1651e6153918SDarrick J. Wong * all other data structures' checksums. However, the METADATA_CSUM and 1652e6153918SDarrick J. Wong * GDT_CSUM bits are mutually exclusive. 1653e6153918SDarrick J. Wong */ 16549b90e5e0STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400 16552cb5cc8bSDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000 16568b4953e1STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000 16573dcf5451SChristoph Hellwig 16583dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 16593dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 16603dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ 16613dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ 16623dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 16633dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ 16643dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 16653dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 16663dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 1667f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */ 1668f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */ 16698c81bd8fSDarrick J. Wong #define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000 16709b90e5e0STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ 167167cf5b09STao Ma #define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ 16723edc18d8STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 16733dcf5451SChristoph Hellwig 1674e2b911c5SDarrick J. Wong #define EXT4_FEATURE_COMPAT_FUNCS(name, flagname) \ 1675e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 1676e2b911c5SDarrick J. Wong { \ 1677e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_compat & \ 1678e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname)) != 0); \ 1679e2b911c5SDarrick J. Wong } \ 1680e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 1681e2b911c5SDarrick J. Wong { \ 1682e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_compat |= \ 1683e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ 1684e2b911c5SDarrick J. Wong } \ 1685e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 1686e2b911c5SDarrick J. Wong { \ 1687e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_compat &= \ 1688e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ 1689e2b911c5SDarrick J. Wong } 1690e2b911c5SDarrick J. Wong 1691e2b911c5SDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_FUNCS(name, flagname) \ 1692e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 1693e2b911c5SDarrick J. Wong { \ 1694e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ 1695e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname)) != 0); \ 1696e2b911c5SDarrick J. Wong } \ 1697e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 1698e2b911c5SDarrick J. Wong { \ 1699e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_ro_compat |= \ 1700e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ 1701e2b911c5SDarrick J. Wong } \ 1702e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 1703e2b911c5SDarrick J. Wong { \ 1704e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_ro_compat &= \ 1705e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ 1706e2b911c5SDarrick J. Wong } 1707e2b911c5SDarrick J. Wong 1708e2b911c5SDarrick J. Wong #define EXT4_FEATURE_INCOMPAT_FUNCS(name, flagname) \ 1709e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 1710e2b911c5SDarrick J. Wong { \ 1711e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ 1712e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname)) != 0); \ 1713e2b911c5SDarrick J. Wong } \ 1714e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 1715e2b911c5SDarrick J. Wong { \ 1716e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_incompat |= \ 1717e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ 1718e2b911c5SDarrick J. Wong } \ 1719e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 1720e2b911c5SDarrick J. Wong { \ 1721e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_incompat &= \ 1722e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ 1723e2b911c5SDarrick J. Wong } 1724e2b911c5SDarrick J. Wong 1725e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(dir_prealloc, DIR_PREALLOC) 1726e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(imagic_inodes, IMAGIC_INODES) 1727e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(journal, HAS_JOURNAL) 1728e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(xattr, EXT_ATTR) 1729e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(resize_inode, RESIZE_INODE) 1730e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(dir_index, DIR_INDEX) 1731e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(sparse_super2, SPARSE_SUPER2) 1732e2b911c5SDarrick J. Wong 1733e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(sparse_super, SPARSE_SUPER) 1734e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(large_file, LARGE_FILE) 1735e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(btree_dir, BTREE_DIR) 1736e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(huge_file, HUGE_FILE) 1737e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(gdt_csum, GDT_CSUM) 1738e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(dir_nlink, DIR_NLINK) 1739e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(extra_isize, EXTRA_ISIZE) 1740e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(quota, QUOTA) 1741e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(bigalloc, BIGALLOC) 1742e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(metadata_csum, METADATA_CSUM) 1743e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(readonly, READONLY) 1744e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(project, PROJECT) 1745e2b911c5SDarrick J. Wong 1746e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(compression, COMPRESSION) 1747e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(filetype, FILETYPE) 1748e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(journal_needs_recovery, RECOVER) 1749e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(journal_dev, JOURNAL_DEV) 1750e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(meta_bg, META_BG) 1751e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(extents, EXTENTS) 1752e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT) 1753e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(mmp, MMP) 1754e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(flex_bg, FLEX_BG) 1755e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(ea_inode, EA_INODE) 1756e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(dirdata, DIRDATA) 1757e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, CSUM_SEED) 1758e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(largedir, LARGEDIR) 1759e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, INLINE_DATA) 1760e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT) 1761e2b911c5SDarrick J. Wong 17622035e776STheodore Ts'o #define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 17632035e776STheodore Ts'o #define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 17642035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 17652035e776STheodore Ts'o #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 17662035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 17672035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 17682035e776STheodore Ts'o 17692035e776STheodore Ts'o #define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 17702035e776STheodore Ts'o #define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 17712035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_RECOVER| \ 17722035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 17732035e776STheodore Ts'o #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 17742035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 17752035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 17762035e776STheodore Ts'o 1777e2b911c5SDarrick J. Wong #define EXT4_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 17783dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 17793dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_RECOVER| \ 17803dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_META_BG| \ 17813dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_EXTENTS| \ 17823dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_64BIT| \ 1783c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_FLEX_BG| \ 1784e50e5129SAndreas Dilger EXT4_FEATURE_INCOMPAT_EA_INODE| \ 1785f08225d1STao Ma EXT4_FEATURE_INCOMPAT_MMP | \ 17866ddb2447STheodore Ts'o EXT4_FEATURE_INCOMPAT_INLINE_DATA | \ 17878c81bd8fSDarrick J. Wong EXT4_FEATURE_INCOMPAT_ENCRYPT | \ 1788e08ac99fSArtem Blagodarenko EXT4_FEATURE_INCOMPAT_CSUM_SEED | \ 1789e08ac99fSArtem Blagodarenko EXT4_FEATURE_INCOMPAT_LARGEDIR) 17903dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 17913dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 17923dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ 17933dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ 17943dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ 17953dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ 17966f16b606STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\ 1797e93376c2SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_BIGALLOC |\ 17987c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\ 1799040cb378SLi Xi EXT4_FEATURE_RO_COMPAT_QUOTA |\ 1800040cb378SLi Xi EXT4_FEATURE_RO_COMPAT_PROJECT) 18013dcf5451SChristoph Hellwig 1802e2b911c5SDarrick J. Wong #define EXTN_FEATURE_FUNCS(ver) \ 1803e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_compat_features(struct super_block *sb) \ 1804e2b911c5SDarrick J. Wong { \ 1805e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_compat & \ 1806e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_COMPAT_SUPP)) != 0); \ 1807e2b911c5SDarrick J. Wong } \ 1808e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_ro_compat_features(struct super_block *sb) \ 1809e2b911c5SDarrick J. Wong { \ 1810e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ 1811e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_RO_COMPAT_SUPP)) != 0); \ 1812e2b911c5SDarrick J. Wong } \ 1813e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_incompat_features(struct super_block *sb) \ 1814e2b911c5SDarrick J. Wong { \ 1815e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ 1816e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_INCOMPAT_SUPP)) != 0); \ 1817e2b911c5SDarrick J. Wong } 1818e2b911c5SDarrick J. Wong 1819e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(2) 1820e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(3) 1821e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(4) 1822e2b911c5SDarrick J. Wong 1823e2b911c5SDarrick J. Wong static inline bool ext4_has_compat_features(struct super_block *sb) 1824e2b911c5SDarrick J. Wong { 1825e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_compat != 0); 1826e2b911c5SDarrick J. Wong } 1827e2b911c5SDarrick J. Wong static inline bool ext4_has_ro_compat_features(struct super_block *sb) 1828e2b911c5SDarrick J. Wong { 1829e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_ro_compat != 0); 1830e2b911c5SDarrick J. Wong } 1831e2b911c5SDarrick J. Wong static inline bool ext4_has_incompat_features(struct super_block *sb) 1832e2b911c5SDarrick J. Wong { 1833e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_incompat != 0); 1834e2b911c5SDarrick J. Wong } 1835e2b911c5SDarrick J. Wong 18363dcf5451SChristoph Hellwig /* 18379549a168STheodore Ts'o * Superblock flags 18389549a168STheodore Ts'o */ 18399549a168STheodore Ts'o #define EXT4_FLAGS_RESIZING 0 18400db1ff22STheodore Ts'o #define EXT4_FLAGS_SHUTDOWN 1 18410db1ff22STheodore Ts'o 18420db1ff22STheodore Ts'o static inline int ext4_forced_shutdown(struct ext4_sb_info *sbi) 18430db1ff22STheodore Ts'o { 18440db1ff22STheodore Ts'o return test_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 18450db1ff22STheodore Ts'o } 18469549a168STheodore Ts'o 18479549a168STheodore Ts'o 18489549a168STheodore Ts'o /* 18493dcf5451SChristoph Hellwig * Default values for user and/or group using reserved blocks 18503dcf5451SChristoph Hellwig */ 18513dcf5451SChristoph Hellwig #define EXT4_DEF_RESUID 0 18523dcf5451SChristoph Hellwig #define EXT4_DEF_RESGID 0 18533dcf5451SChristoph Hellwig 1854040cb378SLi Xi /* 1855040cb378SLi Xi * Default project ID 1856040cb378SLi Xi */ 1857040cb378SLi Xi #define EXT4_DEF_PROJID 0 1858040cb378SLi Xi 1859240799cdSTheodore Ts'o #define EXT4_DEF_INODE_READAHEAD_BLKS 32 1860240799cdSTheodore Ts'o 18613dcf5451SChristoph Hellwig /* 18623dcf5451SChristoph Hellwig * Default mount options 18633dcf5451SChristoph Hellwig */ 18643dcf5451SChristoph Hellwig #define EXT4_DEFM_DEBUG 0x0001 18653dcf5451SChristoph Hellwig #define EXT4_DEFM_BSDGROUPS 0x0002 18663dcf5451SChristoph Hellwig #define EXT4_DEFM_XATTR_USER 0x0004 18673dcf5451SChristoph Hellwig #define EXT4_DEFM_ACL 0x0008 18683dcf5451SChristoph Hellwig #define EXT4_DEFM_UID16 0x0010 18693dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE 0x0060 18703dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_DATA 0x0020 18713dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_ORDERED 0x0040 18723dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_WBACK 0x0060 18738b67f04aSTheodore Ts'o #define EXT4_DEFM_NOBARRIER 0x0100 18748b67f04aSTheodore Ts'o #define EXT4_DEFM_BLOCK_VALIDITY 0x0200 18758b67f04aSTheodore Ts'o #define EXT4_DEFM_DISCARD 0x0400 18768b67f04aSTheodore Ts'o #define EXT4_DEFM_NODELALLOC 0x0800 18773dcf5451SChristoph Hellwig 18783dcf5451SChristoph Hellwig /* 187930773840STheodore Ts'o * Default journal batch times 188030773840STheodore Ts'o */ 188130773840STheodore Ts'o #define EXT4_DEF_MIN_BATCH_TIME 0 188230773840STheodore Ts'o #define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ 188330773840STheodore Ts'o 188430773840STheodore Ts'o /* 1885a4912123STheodore Ts'o * Minimum number of groups in a flexgroup before we separate out 1886a4912123STheodore Ts'o * directories into the first block group of a flexgroup 1887a4912123STheodore Ts'o */ 1888a4912123STheodore Ts'o #define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4 1889a4912123STheodore Ts'o 1890a4912123STheodore Ts'o /* 18913dcf5451SChristoph Hellwig * Structure of a directory entry 18923dcf5451SChristoph Hellwig */ 18933dcf5451SChristoph Hellwig #define EXT4_NAME_LEN 255 18943dcf5451SChristoph Hellwig 18953dcf5451SChristoph Hellwig struct ext4_dir_entry { 18963dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 18973dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 18983dcf5451SChristoph Hellwig __le16 name_len; /* Name length */ 18993dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 19003dcf5451SChristoph Hellwig }; 19013dcf5451SChristoph Hellwig 19023dcf5451SChristoph Hellwig /* 19033dcf5451SChristoph Hellwig * The new version of the directory entry. Since EXT4 structures are 19043dcf5451SChristoph Hellwig * stored in intel byte order, and the name_len field could never be 19053dcf5451SChristoph Hellwig * bigger than 255 chars, it's safe to reclaim the extra byte for the 19063dcf5451SChristoph Hellwig * file_type field. 19073dcf5451SChristoph Hellwig */ 19083dcf5451SChristoph Hellwig struct ext4_dir_entry_2 { 19093dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 19103dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 19113dcf5451SChristoph Hellwig __u8 name_len; /* Name length */ 19123dcf5451SChristoph Hellwig __u8 file_type; 19133dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 19143dcf5451SChristoph Hellwig }; 19153dcf5451SChristoph Hellwig 19163dcf5451SChristoph Hellwig /* 1917e6153918SDarrick J. Wong * This is a bogus directory entry at the end of each leaf block that 1918e6153918SDarrick J. Wong * records checksums. 1919e6153918SDarrick J. Wong */ 1920e6153918SDarrick J. Wong struct ext4_dir_entry_tail { 1921e6153918SDarrick J. Wong __le32 det_reserved_zero1; /* Pretend to be unused */ 1922e6153918SDarrick J. Wong __le16 det_rec_len; /* 12 */ 1923e6153918SDarrick J. Wong __u8 det_reserved_zero2; /* Zero name length */ 1924e6153918SDarrick J. Wong __u8 det_reserved_ft; /* 0xDE, fake file type */ 1925e6153918SDarrick J. Wong __le32 det_checksum; /* crc32c(uuid+inum+dirblock) */ 1926e6153918SDarrick J. Wong }; 1927e6153918SDarrick J. Wong 19283c47d541STao Ma #define EXT4_DIRENT_TAIL(block, blocksize) \ 19293c47d541STao Ma ((struct ext4_dir_entry_tail *)(((void *)(block)) + \ 19303c47d541STao Ma ((blocksize) - \ 19313c47d541STao Ma sizeof(struct ext4_dir_entry_tail)))) 19323c47d541STao Ma 1933e6153918SDarrick J. Wong /* 19343dcf5451SChristoph Hellwig * Ext4 directory file types. Only the low 3 bits are used. The 19353dcf5451SChristoph Hellwig * other bits are reserved for now. 19363dcf5451SChristoph Hellwig */ 19373dcf5451SChristoph Hellwig #define EXT4_FT_UNKNOWN 0 19383dcf5451SChristoph Hellwig #define EXT4_FT_REG_FILE 1 19393dcf5451SChristoph Hellwig #define EXT4_FT_DIR 2 19403dcf5451SChristoph Hellwig #define EXT4_FT_CHRDEV 3 19413dcf5451SChristoph Hellwig #define EXT4_FT_BLKDEV 4 19423dcf5451SChristoph Hellwig #define EXT4_FT_FIFO 5 19433dcf5451SChristoph Hellwig #define EXT4_FT_SOCK 6 19443dcf5451SChristoph Hellwig #define EXT4_FT_SYMLINK 7 19453dcf5451SChristoph Hellwig 19463dcf5451SChristoph Hellwig #define EXT4_FT_MAX 8 19473dcf5451SChristoph Hellwig 1948e6153918SDarrick J. Wong #define EXT4_FT_DIR_CSUM 0xDE 1949e6153918SDarrick J. Wong 19503dcf5451SChristoph Hellwig /* 19513dcf5451SChristoph Hellwig * EXT4_DIR_PAD defines the directory entries boundaries 19523dcf5451SChristoph Hellwig * 19533dcf5451SChristoph Hellwig * NOTE: It must be a multiple of 4 19543dcf5451SChristoph Hellwig */ 19553dcf5451SChristoph Hellwig #define EXT4_DIR_PAD 4 19563dcf5451SChristoph Hellwig #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) 19573dcf5451SChristoph Hellwig #define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \ 19583dcf5451SChristoph Hellwig ~EXT4_DIR_ROUND) 19593dcf5451SChristoph Hellwig #define EXT4_MAX_REC_LEN ((1<<16)-1) 19603dcf5451SChristoph Hellwig 19613dcf5451SChristoph Hellwig /* 19620cfc9255SEric Sandeen * If we ever get support for fs block sizes > page_size, we'll need 19630cfc9255SEric Sandeen * to remove the #if statements in the next two functions... 19640cfc9255SEric Sandeen */ 19650cfc9255SEric Sandeen static inline unsigned int 19660cfc9255SEric Sandeen ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize) 19670cfc9255SEric Sandeen { 19680cfc9255SEric Sandeen unsigned len = le16_to_cpu(dlen); 19690cfc9255SEric Sandeen 1970ea1754a0SKirill A. Shutemov #if (PAGE_SIZE >= 65536) 19710cfc9255SEric Sandeen if (len == EXT4_MAX_REC_LEN || len == 0) 19720cfc9255SEric Sandeen return blocksize; 19730cfc9255SEric Sandeen return (len & 65532) | ((len & 3) << 16); 19740cfc9255SEric Sandeen #else 19750cfc9255SEric Sandeen return len; 19760cfc9255SEric Sandeen #endif 19770cfc9255SEric Sandeen } 19780cfc9255SEric Sandeen 19790cfc9255SEric Sandeen static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize) 19800cfc9255SEric Sandeen { 19810cfc9255SEric Sandeen if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3)) 19820cfc9255SEric Sandeen BUG(); 1983ea1754a0SKirill A. Shutemov #if (PAGE_SIZE >= 65536) 19840cfc9255SEric Sandeen if (len < 65536) 19850cfc9255SEric Sandeen return cpu_to_le16(len); 19860cfc9255SEric Sandeen if (len == blocksize) { 19870cfc9255SEric Sandeen if (blocksize == 65536) 19880cfc9255SEric Sandeen return cpu_to_le16(EXT4_MAX_REC_LEN); 19890cfc9255SEric Sandeen else 19900cfc9255SEric Sandeen return cpu_to_le16(0); 19910cfc9255SEric Sandeen } 19920cfc9255SEric Sandeen return cpu_to_le16((len & 65532) | ((len >> 16) & 3)); 19930cfc9255SEric Sandeen #else 19940cfc9255SEric Sandeen return cpu_to_le16(len); 19950cfc9255SEric Sandeen #endif 19960cfc9255SEric Sandeen } 19970cfc9255SEric Sandeen 19980cfc9255SEric Sandeen /* 19993dcf5451SChristoph Hellwig * Hash Tree Directory indexing 20003dcf5451SChristoph Hellwig * (c) Daniel Phillips, 2001 20013dcf5451SChristoph Hellwig */ 20023dcf5451SChristoph Hellwig 2003e2b911c5SDarrick J. Wong #define is_dx(dir) (ext4_has_feature_dir_index((dir)->i_sb) && \ 200412e9b892SDmitry Monakhov ext4_test_inode_flag((dir), EXT4_INODE_INDEX)) 2005c7414892SAndreas Dilger #define EXT4_DIR_LINK_MAX(dir) unlikely((dir)->i_nlink >= EXT4_LINK_MAX && \ 2006c7414892SAndreas Dilger !(ext4_has_feature_dir_nlink((dir)->i_sb) && is_dx(dir))) 20073dcf5451SChristoph Hellwig #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) 20083dcf5451SChristoph Hellwig 20093dcf5451SChristoph Hellwig /* Legal values for the dx_root hash_version field: */ 20103dcf5451SChristoph Hellwig 20113dcf5451SChristoph Hellwig #define DX_HASH_LEGACY 0 20123dcf5451SChristoph Hellwig #define DX_HASH_HALF_MD4 1 20133dcf5451SChristoph Hellwig #define DX_HASH_TEA 2 2014f99b2589STheodore Ts'o #define DX_HASH_LEGACY_UNSIGNED 3 2015f99b2589STheodore Ts'o #define DX_HASH_HALF_MD4_UNSIGNED 4 2016f99b2589STheodore Ts'o #define DX_HASH_TEA_UNSIGNED 5 20173dcf5451SChristoph Hellwig 20180441984aSDarrick J. Wong static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc, 20190441984aSDarrick J. Wong const void *address, unsigned int length) 20200441984aSDarrick J. Wong { 20210441984aSDarrick J. Wong struct { 20220441984aSDarrick J. Wong struct shash_desc shash; 20233108b54bSTheodore Ts'o char ctx[4]; 20240441984aSDarrick J. Wong } desc; 20250441984aSDarrick J. Wong 20263108b54bSTheodore Ts'o BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx)); 20273108b54bSTheodore Ts'o 20280441984aSDarrick J. Wong desc.shash.tfm = sbi->s_chksum_driver; 20290441984aSDarrick J. Wong desc.shash.flags = 0; 20300441984aSDarrick J. Wong *(u32 *)desc.ctx = crc; 20310441984aSDarrick J. Wong 2032e7093f0dSPetros Koutoupis BUG_ON(crypto_shash_update(&desc.shash, address, length)); 20330441984aSDarrick J. Wong 20340441984aSDarrick J. Wong return *(u32 *)desc.ctx; 20350441984aSDarrick J. Wong } 20360441984aSDarrick J. Wong 20373dcf5451SChristoph Hellwig #ifdef __KERNEL__ 20383dcf5451SChristoph Hellwig 20393dcf5451SChristoph Hellwig /* hash info structure used by the directory hash */ 20403dcf5451SChristoph Hellwig struct dx_hash_info 20413dcf5451SChristoph Hellwig { 20423dcf5451SChristoph Hellwig u32 hash; 20433dcf5451SChristoph Hellwig u32 minor_hash; 20443dcf5451SChristoph Hellwig int hash_version; 20453dcf5451SChristoph Hellwig u32 *seed; 20463dcf5451SChristoph Hellwig }; 20473dcf5451SChristoph Hellwig 2048d1f5273eSFan Yong 2049d1f5273eSFan Yong /* 32 and 64 bit signed EOF for dx directories */ 2050d1f5273eSFan Yong #define EXT4_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1) 2051d1f5273eSFan Yong #define EXT4_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1) 2052d1f5273eSFan Yong 20533dcf5451SChristoph Hellwig 20543dcf5451SChristoph Hellwig /* 20553dcf5451SChristoph Hellwig * Control parameters used by ext4_htree_next_block 20563dcf5451SChristoph Hellwig */ 20573dcf5451SChristoph Hellwig #define HASH_NB_ALWAYS 1 20583dcf5451SChristoph Hellwig 20595b643f9cSTheodore Ts'o struct ext4_filename { 20605b643f9cSTheodore Ts'o const struct qstr *usr_fname; 2061a7550b30SJaegeuk Kim struct fscrypt_str disk_name; 20625b643f9cSTheodore Ts'o struct dx_hash_info hinfo; 20635b643f9cSTheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 2064a7550b30SJaegeuk Kim struct fscrypt_str crypto_buf; 20655b643f9cSTheodore Ts'o #endif 20665b643f9cSTheodore Ts'o }; 20675b643f9cSTheodore Ts'o 20685b643f9cSTheodore Ts'o #define fname_name(p) ((p)->disk_name.name) 20695b643f9cSTheodore Ts'o #define fname_len(p) ((p)->disk_name.len) 20703dcf5451SChristoph Hellwig 20713dcf5451SChristoph Hellwig /* 20723dcf5451SChristoph Hellwig * Describe an inode's exact location on disk and in memory 20733dcf5451SChristoph Hellwig */ 20743dcf5451SChristoph Hellwig struct ext4_iloc 20753dcf5451SChristoph Hellwig { 20763dcf5451SChristoph Hellwig struct buffer_head *bh; 20773dcf5451SChristoph Hellwig unsigned long offset; 20783dcf5451SChristoph Hellwig ext4_group_t block_group; 20793dcf5451SChristoph Hellwig }; 20803dcf5451SChristoph Hellwig 20813dcf5451SChristoph Hellwig static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) 20823dcf5451SChristoph Hellwig { 20833dcf5451SChristoph Hellwig return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); 20843dcf5451SChristoph Hellwig } 20853dcf5451SChristoph Hellwig 2086dec214d0STahsin Erdogan static inline bool ext4_is_quota_file(struct inode *inode) 2087dec214d0STahsin Erdogan { 2088dec214d0STahsin Erdogan return IS_NOQUOTA(inode) && 2089dec214d0STahsin Erdogan !(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL); 2090dec214d0STahsin Erdogan } 209102749a4cSTahsin Erdogan 20923dcf5451SChristoph Hellwig /* 20933dcf5451SChristoph Hellwig * This structure is stuffed into the struct file's private_data field 20943dcf5451SChristoph Hellwig * for directories. It is where we put information so that we can do 20953dcf5451SChristoph Hellwig * readdir operations in hash tree order. 20963dcf5451SChristoph Hellwig */ 20973dcf5451SChristoph Hellwig struct dir_private_info { 20983dcf5451SChristoph Hellwig struct rb_root root; 20993dcf5451SChristoph Hellwig struct rb_node *curr_node; 21003dcf5451SChristoph Hellwig struct fname *extra_fname; 21013dcf5451SChristoph Hellwig loff_t last_pos; 21023dcf5451SChristoph Hellwig __u32 curr_hash; 21033dcf5451SChristoph Hellwig __u32 curr_minor_hash; 21043dcf5451SChristoph Hellwig __u32 next_hash; 21053dcf5451SChristoph Hellwig }; 21063dcf5451SChristoph Hellwig 21073dcf5451SChristoph Hellwig /* calculate the first block number of the group */ 21083dcf5451SChristoph Hellwig static inline ext4_fsblk_t 21093dcf5451SChristoph Hellwig ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) 21103dcf5451SChristoph Hellwig { 21113dcf5451SChristoph Hellwig return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + 21123dcf5451SChristoph Hellwig le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); 21133dcf5451SChristoph Hellwig } 21143dcf5451SChristoph Hellwig 21153dcf5451SChristoph Hellwig /* 21163dcf5451SChristoph Hellwig * Special error return code only used by dx_probe() and its callers. 21173dcf5451SChristoph Hellwig */ 211836de9286STheodore Ts'o #define ERR_BAD_DX_DIR (-(MAX_ERRNO - 1)) 21193dcf5451SChristoph Hellwig 2120e08ac99fSArtem Blagodarenko /* htree levels for ext4 */ 2121e08ac99fSArtem Blagodarenko #define EXT4_HTREE_LEVEL_COMPAT 2 2122e08ac99fSArtem Blagodarenko #define EXT4_HTREE_LEVEL 3 2123e08ac99fSArtem Blagodarenko 2124e08ac99fSArtem Blagodarenko static inline int ext4_dir_htree_level(struct super_block *sb) 2125e08ac99fSArtem Blagodarenko { 2126e08ac99fSArtem Blagodarenko return ext4_has_feature_largedir(sb) ? 2127e08ac99fSArtem Blagodarenko EXT4_HTREE_LEVEL : EXT4_HTREE_LEVEL_COMPAT; 2128e08ac99fSArtem Blagodarenko } 2129e08ac99fSArtem Blagodarenko 21303dcf5451SChristoph Hellwig /* 2131bfff6873SLukas Czerner * Timeout and state flag for lazy initialization inode thread. 2132bfff6873SLukas Czerner */ 2133bfff6873SLukas Czerner #define EXT4_DEF_LI_WAIT_MULT 10 2134bfff6873SLukas Czerner #define EXT4_DEF_LI_MAX_START_DELAY 5 2135bfff6873SLukas Czerner #define EXT4_LAZYINIT_QUIT 0x0001 2136bfff6873SLukas Czerner #define EXT4_LAZYINIT_RUNNING 0x0002 2137bfff6873SLukas Czerner 2138bfff6873SLukas Czerner /* 2139bfff6873SLukas Czerner * Lazy inode table initialization info 2140bfff6873SLukas Czerner */ 2141bfff6873SLukas Czerner struct ext4_lazy_init { 2142bfff6873SLukas Czerner unsigned long li_state; 2143bfff6873SLukas Czerner struct list_head li_request_list; 2144bfff6873SLukas Czerner struct mutex li_list_mtx; 2145bfff6873SLukas Czerner }; 2146bfff6873SLukas Czerner 2147bfff6873SLukas Czerner struct ext4_li_request { 2148bfff6873SLukas Czerner struct super_block *lr_super; 2149bfff6873SLukas Czerner struct ext4_sb_info *lr_sbi; 2150bfff6873SLukas Czerner ext4_group_t lr_next_group; 2151bfff6873SLukas Czerner struct list_head lr_request; 2152bfff6873SLukas Czerner unsigned long lr_next_sched; 2153bfff6873SLukas Czerner unsigned long lr_timeout; 2154bfff6873SLukas Czerner }; 2155bfff6873SLukas Czerner 2156857ac889SLukas Czerner struct ext4_features { 2157857ac889SLukas Czerner struct kobject f_kobj; 2158857ac889SLukas Czerner struct completion f_kobj_unregister; 2159857ac889SLukas Czerner }; 2160857ac889SLukas Czerner 2161bfff6873SLukas Czerner /* 2162c5e06d10SJohann Lombardi * This structure will be used for multiple mount protection. It will be 2163c5e06d10SJohann Lombardi * written into the block number saved in the s_mmp_block field in the 2164c5e06d10SJohann Lombardi * superblock. Programs that check MMP should assume that if 2165c5e06d10SJohann Lombardi * SEQ_FSCK (or any unknown code above SEQ_MAX) is present then it is NOT safe 2166c5e06d10SJohann Lombardi * to use the filesystem, regardless of how old the timestamp is. 2167c5e06d10SJohann Lombardi */ 2168c5e06d10SJohann Lombardi #define EXT4_MMP_MAGIC 0x004D4D50U /* ASCII for MMP */ 2169c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U /* mmp_seq value for clean unmount */ 2170c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_FSCK 0xE24D4D50U /* mmp_seq value when being fscked */ 2171c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_MAX 0xE24D4D4FU /* maximum valid mmp_seq value */ 2172c5e06d10SJohann Lombardi 2173c5e06d10SJohann Lombardi struct mmp_struct { 2174c5e06d10SJohann Lombardi __le32 mmp_magic; /* Magic number for MMP */ 2175c5e06d10SJohann Lombardi __le32 mmp_seq; /* Sequence no. updated periodically */ 2176c5e06d10SJohann Lombardi 2177c5e06d10SJohann Lombardi /* 2178c5e06d10SJohann Lombardi * mmp_time, mmp_nodename & mmp_bdevname are only used for information 2179c5e06d10SJohann Lombardi * purposes and do not affect the correctness of the algorithm 2180c5e06d10SJohann Lombardi */ 2181c5e06d10SJohann Lombardi __le64 mmp_time; /* Time last updated */ 2182c5e06d10SJohann Lombardi char mmp_nodename[64]; /* Node which last updated MMP block */ 2183c5e06d10SJohann Lombardi char mmp_bdevname[32]; /* Bdev which last updated MMP block */ 2184c5e06d10SJohann Lombardi 2185c5e06d10SJohann Lombardi /* 2186c5e06d10SJohann Lombardi * mmp_check_interval is used to verify if the MMP block has been 2187c5e06d10SJohann Lombardi * updated on the block device. The value is updated based on the 2188c5e06d10SJohann Lombardi * maximum time to write the MMP block during an update cycle. 2189c5e06d10SJohann Lombardi */ 2190c5e06d10SJohann Lombardi __le16 mmp_check_interval; 2191c5e06d10SJohann Lombardi 2192c5e06d10SJohann Lombardi __le16 mmp_pad1; 2193e6153918SDarrick J. Wong __le32 mmp_pad2[226]; 2194e6153918SDarrick J. Wong __le32 mmp_checksum; /* crc32c(uuid+mmp_block) */ 2195c5e06d10SJohann Lombardi }; 2196c5e06d10SJohann Lombardi 2197c5e06d10SJohann Lombardi /* arguments passed to the mmp thread */ 2198c5e06d10SJohann Lombardi struct mmpd_data { 2199c5e06d10SJohann Lombardi struct buffer_head *bh; /* bh from initial read_mmp_block() */ 2200c5e06d10SJohann Lombardi struct super_block *sb; /* super block of the fs */ 2201c5e06d10SJohann Lombardi }; 2202c5e06d10SJohann Lombardi 2203c5e06d10SJohann Lombardi /* 2204c5e06d10SJohann Lombardi * Check interval multiplier 2205c5e06d10SJohann Lombardi * The MMP block is written every update interval and initially checked every 2206c5e06d10SJohann Lombardi * update interval x the multiplier (the value is then adapted based on the 2207c5e06d10SJohann Lombardi * write latency). The reason is that writes can be delayed under load and we 2208c5e06d10SJohann Lombardi * don't want readers to incorrectly assume that the filesystem is no longer 2209c5e06d10SJohann Lombardi * in use. 2210c5e06d10SJohann Lombardi */ 2211c5e06d10SJohann Lombardi #define EXT4_MMP_CHECK_MULT 2UL 2212c5e06d10SJohann Lombardi 2213c5e06d10SJohann Lombardi /* 2214c5e06d10SJohann Lombardi * Minimum interval for MMP checking in seconds. 2215c5e06d10SJohann Lombardi */ 2216c5e06d10SJohann Lombardi #define EXT4_MMP_MIN_CHECK_INTERVAL 5UL 2217c5e06d10SJohann Lombardi 2218c5e06d10SJohann Lombardi /* 2219c5e06d10SJohann Lombardi * Maximum interval for MMP checking in seconds. 2220c5e06d10SJohann Lombardi */ 2221c5e06d10SJohann Lombardi #define EXT4_MMP_MAX_CHECK_INTERVAL 300UL 2222c5e06d10SJohann Lombardi 2223c5e06d10SJohann Lombardi /* 22243dcf5451SChristoph Hellwig * Function prototypes 22253dcf5451SChristoph Hellwig */ 22263dcf5451SChristoph Hellwig 22273dcf5451SChristoph Hellwig /* 22283dcf5451SChristoph Hellwig * Ok, these declarations are also in <linux/kernel.h> but none of the 22293dcf5451SChristoph Hellwig * ext4 source programs needs to include it so they are duplicated here. 22303dcf5451SChristoph Hellwig */ 22313dcf5451SChristoph Hellwig # define NORET_TYPE /**/ 22323dcf5451SChristoph Hellwig # define ATTRIB_NORET __attribute__((noreturn)) 22333dcf5451SChristoph Hellwig # define NORET_AND noreturn, 22343dcf5451SChristoph Hellwig 2235498e5f24STheodore Ts'o /* bitmap.c */ 2236f6fb99caSTheodore Ts'o extern unsigned int ext4_count_free(char *bitmap, unsigned numchars); 223741a246d1SDarrick J. Wong void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 223841a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 223941a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 224041a246d1SDarrick J. Wong int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 224141a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 224241a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 2243fa77dcfaSDarrick J. Wong void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 2244fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 224579f1ba49STao Ma struct buffer_head *bh); 2246fa77dcfaSDarrick J. Wong int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 2247fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 224879f1ba49STao Ma struct buffer_head *bh); 2249498e5f24STheodore Ts'o 22503dcf5451SChristoph Hellwig /* balloc.c */ 2251bd86298eSLukas Czerner extern void ext4_get_group_no_and_offset(struct super_block *sb, 2252bd86298eSLukas Czerner ext4_fsblk_t blocknr, 2253bd86298eSLukas Czerner ext4_group_t *blockgrpp, 2254bd86298eSLukas Czerner ext4_grpblk_t *offsetp); 2255bd86298eSLukas Czerner extern ext4_group_t ext4_get_group_number(struct super_block *sb, 2256bd86298eSLukas Czerner ext4_fsblk_t block); 2257bd86298eSLukas Czerner 22583dcf5451SChristoph Hellwig extern unsigned int ext4_block_group(struct super_block *sb, 22593dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 22603dcf5451SChristoph Hellwig extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, 22613dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 22623dcf5451SChristoph Hellwig extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); 22633dcf5451SChristoph Hellwig extern unsigned long ext4_bg_num_gdb(struct super_block *sb, 22643dcf5451SChristoph Hellwig ext4_group_t group); 22657061eba7SAneesh Kumar K.V extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, 226655f020dbSAllison Henderson ext4_fsblk_t goal, 226755f020dbSAllison Henderson unsigned int flags, 226855f020dbSAllison Henderson unsigned long *count, 226955f020dbSAllison Henderson int *errp); 2270e7d5f315STheodore Ts'o extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi, 2271e7d5f315STheodore Ts'o s64 nclusters, unsigned int flags); 22725dee5437STheodore Ts'o extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *); 22733dcf5451SChristoph Hellwig extern void ext4_check_blocks_bitmap(struct super_block *); 22743dcf5451SChristoph Hellwig extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, 22753dcf5451SChristoph Hellwig ext4_group_t block_group, 22763dcf5451SChristoph Hellwig struct buffer_head ** bh); 22773dcf5451SChristoph Hellwig extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); 2278813e5727STheodore Ts'o 2279813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb, 2280813e5727STheodore Ts'o ext4_group_t block_group); 2281813e5727STheodore Ts'o extern int ext4_wait_block_bitmap(struct super_block *sb, 2282813e5727STheodore Ts'o ext4_group_t block_group, 2283813e5727STheodore Ts'o struct buffer_head *bh); 2284813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, 2285bb23c20aSTheodore Ts'o ext4_group_t block_group); 2286cff1dfd7STheodore Ts'o extern unsigned ext4_free_clusters_after_init(struct super_block *sb, 2287fd034a84STheodore Ts'o ext4_group_t block_group, 2288fd034a84STheodore Ts'o struct ext4_group_desc *gdp); 2289f86186b4SEric Sandeen ext4_fsblk_t ext4_inode_to_goal_block(struct inode *); 22903dcf5451SChristoph Hellwig 2291a7550b30SJaegeuk Kim static inline bool ext4_encrypted_inode(struct inode *inode) 2292d5d0e8c7SMichael Halcrow { 2293a7550b30SJaegeuk Kim return ext4_test_inode_flag(inode, EXT4_INODE_ENCRYPT); 2294d5d0e8c7SMichael Halcrow } 2295a7550b30SJaegeuk Kim 2296a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 2297a7550b30SJaegeuk Kim static inline int ext4_fname_setup_filename(struct inode *dir, 2298a7550b30SJaegeuk Kim const struct qstr *iname, 2299a7550b30SJaegeuk Kim int lookup, struct ext4_filename *fname) 2300a7550b30SJaegeuk Kim { 2301a7550b30SJaegeuk Kim struct fscrypt_name name; 2302a7550b30SJaegeuk Kim int err; 2303a7550b30SJaegeuk Kim 2304a7550b30SJaegeuk Kim memset(fname, 0, sizeof(struct ext4_filename)); 2305a7550b30SJaegeuk Kim 2306a7550b30SJaegeuk Kim err = fscrypt_setup_filename(dir, iname, lookup, &name); 2307a7550b30SJaegeuk Kim 2308a7550b30SJaegeuk Kim fname->usr_fname = name.usr_fname; 2309a7550b30SJaegeuk Kim fname->disk_name = name.disk_name; 2310a7550b30SJaegeuk Kim fname->hinfo.hash = name.hash; 2311a7550b30SJaegeuk Kim fname->hinfo.minor_hash = name.minor_hash; 2312a7550b30SJaegeuk Kim fname->crypto_buf = name.crypto_buf; 2313a7550b30SJaegeuk Kim return err; 2314a7550b30SJaegeuk Kim } 2315a7550b30SJaegeuk Kim 2316a7550b30SJaegeuk Kim static inline void ext4_fname_free_filename(struct ext4_filename *fname) 2317a7550b30SJaegeuk Kim { 2318a7550b30SJaegeuk Kim struct fscrypt_name name; 2319a7550b30SJaegeuk Kim 2320a7550b30SJaegeuk Kim name.crypto_buf = fname->crypto_buf; 2321a7550b30SJaegeuk Kim fscrypt_free_filename(&name); 2322a7550b30SJaegeuk Kim 2323a7550b30SJaegeuk Kim fname->crypto_buf.name = NULL; 2324a7550b30SJaegeuk Kim fname->usr_fname = NULL; 2325a7550b30SJaegeuk Kim fname->disk_name.name = NULL; 2326a7550b30SJaegeuk Kim } 2327a7550b30SJaegeuk Kim #else 23285b643f9cSTheodore Ts'o static inline int ext4_fname_setup_filename(struct inode *dir, 23295b643f9cSTheodore Ts'o const struct qstr *iname, 23305b643f9cSTheodore Ts'o int lookup, struct ext4_filename *fname) 23315b643f9cSTheodore Ts'o { 23325b643f9cSTheodore Ts'o fname->usr_fname = iname; 23335b643f9cSTheodore Ts'o fname->disk_name.name = (unsigned char *) iname->name; 23345b643f9cSTheodore Ts'o fname->disk_name.len = iname->len; 23355b643f9cSTheodore Ts'o return 0; 23365b643f9cSTheodore Ts'o } 23375b643f9cSTheodore Ts'o static inline void ext4_fname_free_filename(struct ext4_filename *fname) { } 2338a7550b30SJaegeuk Kim 2339d5d0e8c7SMichael Halcrow #endif 2340d5d0e8c7SMichael Halcrow 23413dcf5451SChristoph Hellwig /* dir.c */ 234260fd4da3STheodore Ts'o extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *, 2343f7c21177STheodore Ts'o struct file *, 23443dcf5451SChristoph Hellwig struct ext4_dir_entry_2 *, 2345226ba972STao Ma struct buffer_head *, char *, int, 2346226ba972STao Ma unsigned int); 2347226ba972STao Ma #define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \ 2348f7c21177STheodore Ts'o unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \ 2349226ba972STao Ma (de), (bh), (buf), (size), (offset))) 23503dcf5451SChristoph Hellwig extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, 23513dcf5451SChristoph Hellwig __u32 minor_hash, 23522f61830aSTheodore Ts'o struct ext4_dir_entry_2 *dirent, 2353a7550b30SJaegeuk Kim struct fscrypt_str *ent_name); 23543dcf5451SChristoph Hellwig extern void ext4_htree_free_dir_info(struct dir_private_info *p); 2355978fef91STao Ma extern int ext4_find_dest_de(struct inode *dir, struct inode *inode, 2356978fef91STao Ma struct buffer_head *bh, 2357978fef91STao Ma void *buf, int buf_size, 23585b643f9cSTheodore Ts'o struct ext4_filename *fname, 2359978fef91STao Ma struct ext4_dir_entry_2 **dest_de); 23601bc0af60SEric Biggers void ext4_insert_dentry(struct inode *inode, 2361978fef91STao Ma struct ext4_dir_entry_2 *de, 2362978fef91STao Ma int buf_size, 23635b643f9cSTheodore Ts'o struct ext4_filename *fname); 2364978fef91STao Ma static inline void ext4_update_dx_flag(struct inode *inode) 2365978fef91STao Ma { 2366e2b911c5SDarrick J. Wong if (!ext4_has_feature_dir_index(inode->i_sb)) 2367978fef91STao Ma ext4_clear_inode_flag(inode, EXT4_INODE_INDEX); 2368978fef91STao Ma } 2369d6006186SEric Biggers static const unsigned char ext4_filetype_table[] = { 237065d165d9STao Ma DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK 237165d165d9STao Ma }; 237265d165d9STao Ma 237365d165d9STao Ma static inline unsigned char get_dtype(struct super_block *sb, int filetype) 237465d165d9STao Ma { 2375e2b911c5SDarrick J. Wong if (!ext4_has_feature_filetype(sb) || filetype >= EXT4_FT_MAX) 237665d165d9STao Ma return DT_UNKNOWN; 237765d165d9STao Ma 237865d165d9STao Ma return ext4_filetype_table[filetype]; 237965d165d9STao Ma } 238040b163f1SDarrick J. Wong extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh, 238140b163f1SDarrick J. Wong void *buf, int buf_size); 23823dcf5451SChristoph Hellwig 23833dcf5451SChristoph Hellwig /* fsync.c */ 238402c24a82SJosef Bacik extern int ext4_sync_file(struct file *, loff_t, loff_t, int); 23853dcf5451SChristoph Hellwig 23863dcf5451SChristoph Hellwig /* hash.c */ 23873dcf5451SChristoph Hellwig extern int ext4fs_dirhash(const char *name, int len, struct 23883dcf5451SChristoph Hellwig dx_hash_info *hinfo); 23893dcf5451SChristoph Hellwig 23903dcf5451SChristoph Hellwig /* ialloc.c */ 23911139575aSTheodore Ts'o extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t, 23925cb81dabSDmitry Monakhov const struct qstr *qstr, __u32 goal, 23931b917ed8STahsin Erdogan uid_t *owner, __u32 i_flags, 23941b917ed8STahsin Erdogan int handle_type, unsigned int line_no, 23951b917ed8STahsin Erdogan int nblocks); 23961139575aSTheodore Ts'o 23971b917ed8STahsin Erdogan #define ext4_new_inode(handle, dir, mode, qstr, goal, owner, i_flags) \ 23981139575aSTheodore Ts'o __ext4_new_inode((handle), (dir), (mode), (qstr), (goal), (owner), \ 23991b917ed8STahsin Erdogan i_flags, 0, 0, 0) 24001139575aSTheodore Ts'o #define ext4_new_inode_start_handle(dir, mode, qstr, goal, owner, \ 24011139575aSTheodore Ts'o type, nblocks) \ 24021139575aSTheodore Ts'o __ext4_new_inode(NULL, (dir), (mode), (qstr), (goal), (owner), \ 24031b917ed8STahsin Erdogan 0, (type), __LINE__, (nblocks)) 24041139575aSTheodore Ts'o 24051139575aSTheodore Ts'o 24063dcf5451SChristoph Hellwig extern void ext4_free_inode(handle_t *, struct inode *); 24073dcf5451SChristoph Hellwig extern struct inode * ext4_orphan_get(struct super_block *, unsigned long); 24083dcf5451SChristoph Hellwig extern unsigned long ext4_count_free_inodes(struct super_block *); 24093dcf5451SChristoph Hellwig extern unsigned long ext4_count_dirs(struct super_block *); 24103dcf5451SChristoph Hellwig extern void ext4_check_inodes_bitmap(struct super_block *); 241161d08673STheodore Ts'o extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap); 2412bfff6873SLukas Czerner extern int ext4_init_inode_table(struct super_block *sb, 2413bfff6873SLukas Czerner ext4_group_t group, int barrier); 2414813e5727STheodore Ts'o extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate); 24153dcf5451SChristoph Hellwig 24163dcf5451SChristoph Hellwig /* mballoc.c */ 2417247dbed8SChristoph Hellwig extern const struct seq_operations ext4_mb_seq_groups_ops; 24183dcf5451SChristoph Hellwig extern long ext4_mb_stats; 24193dcf5451SChristoph Hellwig extern long ext4_mb_max_to_scan; 24209d99012fSAkira Fujita extern int ext4_mb_init(struct super_block *); 24213dcf5451SChristoph Hellwig extern int ext4_mb_release(struct super_block *); 24223dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, 24233dcf5451SChristoph Hellwig struct ext4_allocation_request *, int *); 24243dcf5451SChristoph Hellwig extern int ext4_mb_reserve_blocks(struct super_block *, int); 2425c2ea3fdeSTheodore Ts'o extern void ext4_discard_preallocations(struct inode *); 24265dabfc78STheodore Ts'o extern int __init ext4_init_mballoc(void); 24275dabfc78STheodore Ts'o extern void ext4_exit_mballoc(void); 242844338711STheodore Ts'o extern void ext4_free_blocks(handle_t *handle, struct inode *inode, 2429e6362609STheodore Ts'o struct buffer_head *bh, ext4_fsblk_t block, 2430e6362609STheodore Ts'o unsigned long count, int flags); 243128623c2fSTheodore Ts'o extern int ext4_mb_alloc_groupinfo(struct super_block *sb, 243228623c2fSTheodore Ts'o ext4_group_t ngroups); 2433920313a7SAneesh Kumar K.V extern int ext4_mb_add_groupinfo(struct super_block *sb, 24345f21b0e6SFrederic Bohe ext4_group_t i, struct ext4_group_desc *desc); 2435cc7365dfSYongqiang Yang extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, 24362846e820SAmir Goldstein ext4_fsblk_t block, unsigned long count); 24377360d173SLukas Czerner extern int ext4_trim_fs(struct super_block *, struct fstrim_range *); 2438a0154344SDaeho Jeong extern void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid); 24397360d173SLukas Czerner 24403dcf5451SChristoph Hellwig /* inode.c */ 2441f348c252STheodore Ts'o int ext4_inode_is_fast_symlink(struct inode *inode); 244210560082STheodore Ts'o struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int); 24431c215028STheodore Ts'o struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int); 24449699d4f9STahsin Erdogan int ext4_bread_batch(struct inode *inode, ext4_lblk_t block, int bh_count, 24459699d4f9STahsin Erdogan bool wait, struct buffer_head **bhs); 2446705965bdSJan Kara int ext4_get_block_unwritten(struct inode *inode, sector_t iblock, 2447f19d5870STao Ma struct buffer_head *bh_result, int create); 24486873fa0dSEric Sandeen int ext4_get_block(struct inode *inode, sector_t iblock, 24496873fa0dSEric Sandeen struct buffer_head *bh_result, int create); 2450705965bdSJan Kara int ext4_dio_get_block(struct inode *inode, sector_t iblock, 2451705965bdSJan Kara struct buffer_head *bh_result, int create); 24529c3569b5STao Ma int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, 24539c3569b5STao Ma struct buffer_head *bh, int create); 2454f19d5870STao Ma int ext4_walk_page_buffers(handle_t *handle, 2455f19d5870STao Ma struct buffer_head *head, 2456f19d5870STao Ma unsigned from, 2457f19d5870STao Ma unsigned to, 2458f19d5870STao Ma int *partial, 2459f19d5870STao Ma int (*fn)(handle_t *handle, 2460f19d5870STao Ma struct buffer_head *bh)); 2461f19d5870STao Ma int do_journal_get_write_access(handle_t *handle, 2462f19d5870STao Ma struct buffer_head *bh); 24639c3569b5STao Ma #define FALL_BACK_TO_NONDELALLOC 1 24649c3569b5STao Ma #define CONVERT_INLINE_DATA 2 24653dcf5451SChristoph Hellwig 24663dcf5451SChristoph Hellwig extern struct inode *ext4_iget(struct super_block *, unsigned long); 2467f4bb2981STheodore Ts'o extern struct inode *ext4_iget_normal(struct super_block *, unsigned long); 2468a9185b41SChristoph Hellwig extern int ext4_write_inode(struct inode *, struct writeback_control *); 24693dcf5451SChristoph Hellwig extern int ext4_setattr(struct dentry *, struct iattr *); 2470a528d35eSDavid Howells extern int ext4_getattr(const struct path *, struct kstat *, u32, unsigned int); 24710930fcc1SAl Viro extern void ext4_evict_inode(struct inode *); 24720930fcc1SAl Viro extern void ext4_clear_inode(struct inode *); 247399652ea5SDavid Howells extern int ext4_file_getattr(const struct path *, struct kstat *, u32, unsigned int); 24743dcf5451SChristoph Hellwig extern int ext4_sync_inode(handle_t *, struct inode *); 2475aa385729SChristoph Hellwig extern void ext4_dirty_inode(struct inode *, int); 24763dcf5451SChristoph Hellwig extern int ext4_change_inode_journal_flag(struct inode *, int); 24773dcf5451SChristoph Hellwig extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); 2478a361293fSJan Kara extern int ext4_inode_attach_jinode(struct inode *inode); 247991ef4cafSDuane Griffin extern int ext4_can_truncate(struct inode *inode); 24802c98eb5eSTheodore Ts'o extern int ext4_truncate(struct inode *); 2481430657b6SRoss Zwisler extern int ext4_break_layouts(struct inode *); 2482aeb2817aSAshish Sangwan extern int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length); 2483487caeefSJan Kara extern int ext4_truncate_restart_trans(handle_t *, struct inode *, int nblocks); 24843dcf5451SChristoph Hellwig extern void ext4_set_inode_flags(struct inode *); 2485ccd2506bSTheodore Ts'o extern int ext4_alloc_da_blocks(struct inode *inode); 24863dcf5451SChristoph Hellwig extern void ext4_set_aops(struct inode *inode); 24873dcf5451SChristoph Hellwig extern int ext4_writepage_trans_blocks(struct inode *); 2488f3bd1f3fSMingming Cao extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); 2489a87dd18cSLukas Czerner extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode, 2490a87dd18cSLukas Czerner loff_t lstart, loff_t lend); 2491401b25aaSSouptick Joarder extern vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf); 2492401b25aaSSouptick Joarder extern vm_fault_t ext4_filemap_fault(struct vm_fault *vmf); 2493a9e7f447SDmitry Monakhov extern qsize_t *ext4_get_reserved_space(struct inode *inode); 2494040cb378SLi Xi extern int ext4_get_projid(struct inode *inode, kprojid_t *projid); 2495f456767dSEric Whitney extern void ext4_da_release_space(struct inode *inode, int to_free); 24965f634d06SAneesh Kumar K.V extern void ext4_da_update_reserve_space(struct inode *inode, 24975f634d06SAneesh Kumar K.V int used, int quota_claim); 249853085facSJan Kara extern int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk, 249953085facSJan Kara ext4_fsblk_t pblk, ext4_lblk_t len); 2500dae1e52cSAmir Goldstein 2501dae1e52cSAmir Goldstein /* indirect.c */ 2502dae1e52cSAmir Goldstein extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, 2503dae1e52cSAmir Goldstein struct ext4_map_blocks *map, int flags); 2504dae1e52cSAmir Goldstein extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock); 2505fa55a0edSJan Kara extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks); 2506819c4920STheodore Ts'o extern void ext4_ind_truncate(handle_t *, struct inode *inode); 25074f579ae7SLukas Czerner extern int ext4_ind_remove_space(handle_t *handle, struct inode *inode, 25084f579ae7SLukas Czerner ext4_lblk_t start, ext4_lblk_t end); 2509ff9893dcSAmir Goldstein 25103dcf5451SChristoph Hellwig /* ioctl.c */ 25113dcf5451SChristoph Hellwig extern long ext4_ioctl(struct file *, unsigned int, unsigned long); 25123dcf5451SChristoph Hellwig extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long); 25133dcf5451SChristoph Hellwig 25143dcf5451SChristoph Hellwig /* migrate.c */ 25152a43a878SAneesh Kumar K.V extern int ext4_ext_migrate(struct inode *); 25160d14b098SLukas Czerner extern int ext4_ind_migrate(struct inode *inode); 25173d0518f4SWei Yongjun 25183dcf5451SChristoph Hellwig /* namei.c */ 2519b0336e8dSDarrick J. Wong extern int ext4_dirent_csum_verify(struct inode *inode, 2520b0336e8dSDarrick J. Wong struct ext4_dir_entry *dirent); 25213dcf5451SChristoph Hellwig extern int ext4_orphan_add(handle_t *, struct inode *); 25223dcf5451SChristoph Hellwig extern int ext4_orphan_del(handle_t *, struct inode *); 25233dcf5451SChristoph Hellwig extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, 25243dcf5451SChristoph Hellwig __u32 start_minor_hash, __u32 *next_hash); 25255b643f9cSTheodore Ts'o extern int ext4_search_dir(struct buffer_head *bh, 25267335cd3bSTao Ma char *search_buf, 25277335cd3bSTao Ma int buf_size, 25287335cd3bSTao Ma struct inode *dir, 25295b643f9cSTheodore Ts'o struct ext4_filename *fname, 25307335cd3bSTao Ma unsigned int offset, 25317335cd3bSTao Ma struct ext4_dir_entry_2 **res_dir); 253205019a9eSTao Ma extern int ext4_generic_delete_entry(handle_t *handle, 253305019a9eSTao Ma struct inode *dir, 253405019a9eSTao Ma struct ext4_dir_entry_2 *de_del, 253505019a9eSTao Ma struct buffer_head *bh, 253605019a9eSTao Ma void *entry_buf, 253705019a9eSTao Ma int buf_size, 253805019a9eSTao Ma int csum_size); 2539a7550b30SJaegeuk Kim extern bool ext4_empty_dir(struct inode *inode); 25403dcf5451SChristoph Hellwig 25413dcf5451SChristoph Hellwig /* resize.c */ 25423dcf5451SChristoph Hellwig extern int ext4_group_add(struct super_block *sb, 25433dcf5451SChristoph Hellwig struct ext4_new_group_data *input); 25443dcf5451SChristoph Hellwig extern int ext4_group_extend(struct super_block *sb, 25453dcf5451SChristoph Hellwig struct ext4_super_block *es, 25463dcf5451SChristoph Hellwig ext4_fsblk_t n_blocks_count); 254719c5246dSYongqiang Yang extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count); 25483dcf5451SChristoph Hellwig 25493dcf5451SChristoph Hellwig /* super.c */ 2550ebd173beSTheodore Ts'o extern int ext4_seq_options_show(struct seq_file *seq, void *offset); 2551952fc18eSTheodore Ts'o extern int ext4_calculate_overhead(struct super_block *sb); 255206db49e6STheodore Ts'o extern void ext4_superblock_csum_set(struct super_block *sb); 25539933fc0aSTheodore Ts'o extern void *ext4_kvmalloc(size_t size, gfp_t flags); 25549933fc0aSTheodore Ts'o extern void *ext4_kvzalloc(size_t size, gfp_t flags); 2555117fff10STheodore Ts'o extern int ext4_alloc_flex_bg_array(struct super_block *sb, 2556117fff10STheodore Ts'o ext4_group_t ngroup); 2557722887ddSTheodore Ts'o extern const char *ext4_decode_error(struct super_block *sb, int errno, 2558722887ddSTheodore Ts'o char nbuf[16]); 2559db79e6d1SWang Shilong extern void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 2560db79e6d1SWang Shilong ext4_group_t block_group, 2561db79e6d1SWang Shilong unsigned int flags); 2562e7c96e8eSJoe Perches 2563b9075fa9SJoe Perches extern __printf(4, 5) 2564b9075fa9SJoe Perches void __ext4_error(struct super_block *, const char *, unsigned int, 2565b9075fa9SJoe Perches const char *, ...); 2566b9075fa9SJoe Perches extern __printf(5, 6) 2567e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *, const char *, unsigned int, ext4_fsblk_t, 2568b9075fa9SJoe Perches const char *, ...); 2569b9075fa9SJoe Perches extern __printf(5, 6) 2570e7c96e8eSJoe Perches void __ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t, 2571b9075fa9SJoe Perches const char *, ...); 2572c398eda0STheodore Ts'o extern void __ext4_std_error(struct super_block *, const char *, 2573c398eda0STheodore Ts'o unsigned int, int); 2574b9075fa9SJoe Perches extern __printf(4, 5) 2575b9075fa9SJoe Perches void __ext4_abort(struct super_block *, const char *, unsigned int, 2576b9075fa9SJoe Perches const char *, ...); 2577b9075fa9SJoe Perches extern __printf(4, 5) 2578b9075fa9SJoe Perches void __ext4_warning(struct super_block *, const char *, unsigned int, 2579b9075fa9SJoe Perches const char *, ...); 2580b03a2f7eSAndreas Dilger extern __printf(4, 5) 2581b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 2582b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...); 2583b9075fa9SJoe Perches extern __printf(3, 4) 2584e7c96e8eSJoe Perches void __ext4_msg(struct super_block *, const char *, const char *, ...); 2585c5e06d10SJohann Lombardi extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp, 2586c5e06d10SJohann Lombardi const char *, unsigned int, const char *); 2587b9075fa9SJoe Perches extern __printf(7, 8) 2588b9075fa9SJoe Perches void __ext4_grp_locked_error(const char *, unsigned int, 2589b9075fa9SJoe Perches struct super_block *, ext4_group_t, 2590b9075fa9SJoe Perches unsigned long, ext4_fsblk_t, 2591b9075fa9SJoe Perches const char *, ...); 2592e7c96e8eSJoe Perches 2593b03a2f7eSAndreas Dilger #define EXT4_ERROR_INODE(inode, fmt, a...) \ 2594b03a2f7eSAndreas Dilger ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a) 2595b03a2f7eSAndreas Dilger 2596b03a2f7eSAndreas Dilger #define EXT4_ERROR_INODE_BLOCK(inode, block, fmt, a...) \ 2597b03a2f7eSAndreas Dilger ext4_error_inode((inode), __func__, __LINE__, (block), (fmt), ## a) 2598b03a2f7eSAndreas Dilger 2599b03a2f7eSAndreas Dilger #define EXT4_ERROR_FILE(file, block, fmt, a...) \ 2600b03a2f7eSAndreas Dilger ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a) 2601b03a2f7eSAndreas Dilger 2602e7c96e8eSJoe Perches #ifdef CONFIG_PRINTK 2603e7c96e8eSJoe Perches 2604e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 2605e7c96e8eSJoe Perches __ext4_error_inode(inode, func, line, block, fmt, ##__VA_ARGS__) 2606e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 2607e7c96e8eSJoe Perches __ext4_error_file(file, func, line, block, fmt, ##__VA_ARGS__) 2608e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 2609e7c96e8eSJoe Perches __ext4_error(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2610e7c96e8eSJoe Perches #define ext4_abort(sb, fmt, ...) \ 2611e7c96e8eSJoe Perches __ext4_abort(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2612e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 2613e7c96e8eSJoe Perches __ext4_warning(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2614b03a2f7eSAndreas Dilger #define ext4_warning_inode(inode, fmt, ...) \ 2615b03a2f7eSAndreas Dilger __ext4_warning_inode(inode, __func__, __LINE__, fmt, ##__VA_ARGS__) 2616e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 2617e7c96e8eSJoe Perches __ext4_msg(sb, level, fmt, ##__VA_ARGS__) 2618e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 2619e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, __func__, __LINE__, msg) 2620e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 2621e7c96e8eSJoe Perches __ext4_grp_locked_error(__func__, __LINE__, sb, grp, ino, block, \ 2622e7c96e8eSJoe Perches fmt, ##__VA_ARGS__) 2623e7c96e8eSJoe Perches 2624e7c96e8eSJoe Perches #else 2625e7c96e8eSJoe Perches 2626e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 2627e7c96e8eSJoe Perches do { \ 2628e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2629e7c96e8eSJoe Perches __ext4_error_inode(inode, "", 0, block, " "); \ 2630e7c96e8eSJoe Perches } while (0) 2631e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 2632e7c96e8eSJoe Perches do { \ 2633e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2634e7c96e8eSJoe Perches __ext4_error_file(file, "", 0, block, " "); \ 2635e7c96e8eSJoe Perches } while (0) 2636e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 2637e7c96e8eSJoe Perches do { \ 2638e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2639e7c96e8eSJoe Perches __ext4_error(sb, "", 0, " "); \ 2640e7c96e8eSJoe Perches } while (0) 2641e7c96e8eSJoe Perches #define ext4_abort(sb, fmt, ...) \ 2642e7c96e8eSJoe Perches do { \ 2643e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2644e7c96e8eSJoe Perches __ext4_abort(sb, "", 0, " "); \ 2645e7c96e8eSJoe Perches } while (0) 2646e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 2647e7c96e8eSJoe Perches do { \ 2648e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2649e7c96e8eSJoe Perches __ext4_warning(sb, "", 0, " "); \ 2650e7c96e8eSJoe Perches } while (0) 2651b03a2f7eSAndreas Dilger #define ext4_warning_inode(inode, fmt, ...) \ 2652b03a2f7eSAndreas Dilger do { \ 2653b03a2f7eSAndreas Dilger no_printk(fmt, ##__VA_ARGS__); \ 2654b03a2f7eSAndreas Dilger __ext4_warning_inode(inode, "", 0, " "); \ 2655b03a2f7eSAndreas Dilger } while (0) 2656e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 2657e7c96e8eSJoe Perches do { \ 2658e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2659e7c96e8eSJoe Perches __ext4_msg(sb, "", " "); \ 2660e7c96e8eSJoe Perches } while (0) 2661e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 2662e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, "", 0, "") 2663e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 2664e7c96e8eSJoe Perches do { \ 2665e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2666e7c96e8eSJoe Perches __ext4_grp_locked_error("", 0, sb, grp, ino, block, " "); \ 2667e7c96e8eSJoe Perches } while (0) 2668e7c96e8eSJoe Perches 2669e7c96e8eSJoe Perches #endif 2670e7c96e8eSJoe Perches 26713dcf5451SChristoph Hellwig extern void ext4_update_dynamic_rev(struct super_block *sb); 26723dcf5451SChristoph Hellwig extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb, 26733dcf5451SChristoph Hellwig __u32 compat); 26743dcf5451SChristoph Hellwig extern int ext4_update_rocompat_feature(handle_t *handle, 26753dcf5451SChristoph Hellwig struct super_block *sb, __u32 rocompat); 26763dcf5451SChristoph Hellwig extern int ext4_update_incompat_feature(handle_t *handle, 26773dcf5451SChristoph Hellwig struct super_block *sb, __u32 incompat); 26783dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 26793dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 26803dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 26813dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 26823dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_table(struct super_block *sb, 26833dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 2684021b65bbSTheodore Ts'o extern __u32 ext4_free_group_clusters(struct super_block *sb, 2685560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2686560671a0SAneesh Kumar K.V extern __u32 ext4_free_inodes_count(struct super_block *sb, 2687560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2688560671a0SAneesh Kumar K.V extern __u32 ext4_used_dirs_count(struct super_block *sb, 2689560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2690560671a0SAneesh Kumar K.V extern __u32 ext4_itable_unused_count(struct super_block *sb, 2691560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 26923dcf5451SChristoph Hellwig extern void ext4_block_bitmap_set(struct super_block *sb, 26933dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 26943dcf5451SChristoph Hellwig extern void ext4_inode_bitmap_set(struct super_block *sb, 26953dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 26963dcf5451SChristoph Hellwig extern void ext4_inode_table_set(struct super_block *sb, 26973dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 2698021b65bbSTheodore Ts'o extern void ext4_free_group_clusters_set(struct super_block *sb, 2699021b65bbSTheodore Ts'o struct ext4_group_desc *bg, 2700021b65bbSTheodore Ts'o __u32 count); 2701560671a0SAneesh Kumar K.V extern void ext4_free_inodes_set(struct super_block *sb, 2702560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2703560671a0SAneesh Kumar K.V extern void ext4_used_dirs_set(struct super_block *sb, 2704560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2705560671a0SAneesh Kumar K.V extern void ext4_itable_unused_set(struct super_block *sb, 2706560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2707feb0ab32SDarrick J. Wong extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group, 2708bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 2709feb0ab32SDarrick J. Wong extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group, 2710bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 27117f511862STheodore Ts'o extern int ext4_register_li_request(struct super_block *sb, 27127f511862STheodore Ts'o ext4_group_t first_not_zeroed); 27133dcf5451SChristoph Hellwig 27149aa5d32bSDmitry Monakhov static inline int ext4_has_metadata_csum(struct super_block *sb) 27159aa5d32bSDmitry Monakhov { 2716e2b911c5SDarrick J. Wong WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) && 27179aa5d32bSDmitry Monakhov !EXT4_SB(sb)->s_chksum_driver); 27189aa5d32bSDmitry Monakhov 2719dec214d0STahsin Erdogan return ext4_has_feature_metadata_csum(sb) && 2720dec214d0STahsin Erdogan (EXT4_SB(sb)->s_chksum_driver != NULL); 27219aa5d32bSDmitry Monakhov } 2722dec214d0STahsin Erdogan 2723dec214d0STahsin Erdogan static inline int ext4_has_group_desc_csum(struct super_block *sb) 2724dec214d0STahsin Erdogan { 2725dec214d0STahsin Erdogan return ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb); 2726dec214d0STahsin Erdogan } 2727dec214d0STahsin Erdogan 27283dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) 27293dcf5451SChristoph Hellwig { 27303dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) | 27313dcf5451SChristoph Hellwig le32_to_cpu(es->s_blocks_count_lo); 27323dcf5451SChristoph Hellwig } 27333dcf5451SChristoph Hellwig 27343dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) 27353dcf5451SChristoph Hellwig { 27363dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) | 27373dcf5451SChristoph Hellwig le32_to_cpu(es->s_r_blocks_count_lo); 27383dcf5451SChristoph Hellwig } 27393dcf5451SChristoph Hellwig 27403dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) 27413dcf5451SChristoph Hellwig { 27423dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) | 27433dcf5451SChristoph Hellwig le32_to_cpu(es->s_free_blocks_count_lo); 27443dcf5451SChristoph Hellwig } 27453dcf5451SChristoph Hellwig 27463dcf5451SChristoph Hellwig static inline void ext4_blocks_count_set(struct ext4_super_block *es, 27473dcf5451SChristoph Hellwig ext4_fsblk_t blk) 27483dcf5451SChristoph Hellwig { 27493dcf5451SChristoph Hellwig es->s_blocks_count_lo = cpu_to_le32((u32)blk); 27503dcf5451SChristoph Hellwig es->s_blocks_count_hi = cpu_to_le32(blk >> 32); 27513dcf5451SChristoph Hellwig } 27523dcf5451SChristoph Hellwig 27533dcf5451SChristoph Hellwig static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, 27543dcf5451SChristoph Hellwig ext4_fsblk_t blk) 27553dcf5451SChristoph Hellwig { 27563dcf5451SChristoph Hellwig es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); 27573dcf5451SChristoph Hellwig es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); 27583dcf5451SChristoph Hellwig } 27593dcf5451SChristoph Hellwig 27603dcf5451SChristoph Hellwig static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, 27613dcf5451SChristoph Hellwig ext4_fsblk_t blk) 27623dcf5451SChristoph Hellwig { 27633dcf5451SChristoph Hellwig es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); 27643dcf5451SChristoph Hellwig es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); 27653dcf5451SChristoph Hellwig } 27663dcf5451SChristoph Hellwig 2767e08ac99fSArtem Blagodarenko static inline loff_t ext4_isize(struct super_block *sb, 2768e08ac99fSArtem Blagodarenko struct ext4_inode *raw_inode) 27693dcf5451SChristoph Hellwig { 2770e08ac99fSArtem Blagodarenko if (ext4_has_feature_largedir(sb) || 2771e08ac99fSArtem Blagodarenko S_ISREG(le16_to_cpu(raw_inode->i_mode))) 27723dcf5451SChristoph Hellwig return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | 27733dcf5451SChristoph Hellwig le32_to_cpu(raw_inode->i_size_lo); 2774e08ac99fSArtem Blagodarenko 277506a279d6STheodore Ts'o return (loff_t) le32_to_cpu(raw_inode->i_size_lo); 27763dcf5451SChristoph Hellwig } 27773dcf5451SChristoph Hellwig 27783dcf5451SChristoph Hellwig static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) 27793dcf5451SChristoph Hellwig { 27803dcf5451SChristoph Hellwig raw_inode->i_size_lo = cpu_to_le32(i_size); 27813dcf5451SChristoph Hellwig raw_inode->i_size_high = cpu_to_le32(i_size >> 32); 27823dcf5451SChristoph Hellwig } 27833dcf5451SChristoph Hellwig 27843dcf5451SChristoph Hellwig static inline 27853dcf5451SChristoph Hellwig struct ext4_group_info *ext4_get_group_info(struct super_block *sb, 27863dcf5451SChristoph Hellwig ext4_group_t group) 27873dcf5451SChristoph Hellwig { 27883dcf5451SChristoph Hellwig struct ext4_group_info ***grp_info; 27893dcf5451SChristoph Hellwig long indexv, indexh; 27902f2e09ebSTheodore Ts'o BUG_ON(group >= EXT4_SB(sb)->s_groups_count); 27913dcf5451SChristoph Hellwig grp_info = EXT4_SB(sb)->s_group_info; 27923dcf5451SChristoph Hellwig indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); 27933dcf5451SChristoph Hellwig indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); 27943dcf5451SChristoph Hellwig return grp_info[indexv][indexh]; 27953dcf5451SChristoph Hellwig } 27963dcf5451SChristoph Hellwig 27978df9675fSTheodore Ts'o /* 27988df9675fSTheodore Ts'o * Reading s_groups_count requires using smp_rmb() afterwards. See 27998df9675fSTheodore Ts'o * the locking protocol documented in the comments of ext4_group_add() 28008df9675fSTheodore Ts'o * in resize.c 28018df9675fSTheodore Ts'o */ 28028df9675fSTheodore Ts'o static inline ext4_group_t ext4_get_groups_count(struct super_block *sb) 28038df9675fSTheodore Ts'o { 28048df9675fSTheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 28058df9675fSTheodore Ts'o 28068df9675fSTheodore Ts'o smp_rmb(); 28078df9675fSTheodore Ts'o return ngroups; 28088df9675fSTheodore Ts'o } 28093dcf5451SChristoph Hellwig 2810772cb7c8SJose R. Santos static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, 2811772cb7c8SJose R. Santos ext4_group_t block_group) 2812772cb7c8SJose R. Santos { 2813772cb7c8SJose R. Santos return block_group >> sbi->s_log_groups_per_flex; 2814772cb7c8SJose R. Santos } 2815772cb7c8SJose R. Santos 2816772cb7c8SJose R. Santos static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi) 2817772cb7c8SJose R. Santos { 2818772cb7c8SJose R. Santos return 1 << sbi->s_log_groups_per_flex; 2819772cb7c8SJose R. Santos } 2820772cb7c8SJose R. Santos 28213dcf5451SChristoph Hellwig #define ext4_std_error(sb, errno) \ 28223dcf5451SChristoph Hellwig do { \ 28233dcf5451SChristoph Hellwig if ((errno)) \ 2824c398eda0STheodore Ts'o __ext4_std_error((sb), __func__, __LINE__, (errno)); \ 28253dcf5451SChristoph Hellwig } while (0) 28263dcf5451SChristoph Hellwig 2827a30d542aSAneesh Kumar K.V #ifdef CONFIG_SMP 2828df55c99dSTheodore Ts'o /* Each CPU can accumulate percpu_counter_batch clusters in their local 2829df55c99dSTheodore Ts'o * counters. So we need to make sure we have free clusters more 2830179f7ebfSEric Dumazet * than percpu_counter_batch * nr_cpu_ids. Also add a window of 4 times. 2831a30d542aSAneesh Kumar K.V */ 2832df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids)) 2833a30d542aSAneesh Kumar K.V #else 2834df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK 0 2835a30d542aSAneesh Kumar K.V #endif 2836a30d542aSAneesh Kumar K.V 283790e775b7SJan Kara /* Update i_disksize. Requires i_mutex to avoid races with truncate */ 2838cf17fea6SAneesh Kumar K.V static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize) 2839cf17fea6SAneesh Kumar K.V { 284090e775b7SJan Kara WARN_ON_ONCE(S_ISREG(inode->i_mode) && 28415955102cSAl Viro !inode_is_locked(inode)); 2842cf17fea6SAneesh Kumar K.V down_write(&EXT4_I(inode)->i_data_sem); 2843cf17fea6SAneesh Kumar K.V if (newsize > EXT4_I(inode)->i_disksize) 2844cf17fea6SAneesh Kumar K.V EXT4_I(inode)->i_disksize = newsize; 2845cf17fea6SAneesh Kumar K.V up_write(&EXT4_I(inode)->i_data_sem); 284690e775b7SJan Kara } 284790e775b7SJan Kara 28484631dbf6SDmitry Monakhov /* Update i_size, i_disksize. Requires i_mutex to avoid races with truncate */ 28494631dbf6SDmitry Monakhov static inline int ext4_update_inode_size(struct inode *inode, loff_t newsize) 28504631dbf6SDmitry Monakhov { 28514631dbf6SDmitry Monakhov int changed = 0; 28524631dbf6SDmitry Monakhov 28534631dbf6SDmitry Monakhov if (newsize > inode->i_size) { 28544631dbf6SDmitry Monakhov i_size_write(inode, newsize); 28554631dbf6SDmitry Monakhov changed = 1; 28564631dbf6SDmitry Monakhov } 28574631dbf6SDmitry Monakhov if (newsize > EXT4_I(inode)->i_disksize) { 28584631dbf6SDmitry Monakhov ext4_update_i_disksize(inode, newsize); 28594631dbf6SDmitry Monakhov changed |= 2; 28604631dbf6SDmitry Monakhov } 28614631dbf6SDmitry Monakhov return changed; 28624631dbf6SDmitry Monakhov } 28634631dbf6SDmitry Monakhov 286401127848SJan Kara int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset, 286501127848SJan Kara loff_t len); 286601127848SJan Kara 28675d1b1b3fSAneesh Kumar K.V struct ext4_group_info { 28685d1b1b3fSAneesh Kumar K.V unsigned long bb_state; 28695d1b1b3fSAneesh Kumar K.V struct rb_root bb_free_root; 2870a36b4498SEric Sandeen ext4_grpblk_t bb_first_free; /* first free block */ 2871a36b4498SEric Sandeen ext4_grpblk_t bb_free; /* total free blocks */ 2872a36b4498SEric Sandeen ext4_grpblk_t bb_fragments; /* nr of freespace fragments */ 28738a57d9d6SCurt Wohlgemuth ext4_grpblk_t bb_largest_free_order;/* order of largest frag in BG */ 28745d1b1b3fSAneesh Kumar K.V struct list_head bb_prealloc_list; 28755d1b1b3fSAneesh Kumar K.V #ifdef DOUBLE_CHECK 28765d1b1b3fSAneesh Kumar K.V void *bb_bitmap; 28775d1b1b3fSAneesh Kumar K.V #endif 28785d1b1b3fSAneesh Kumar K.V struct rw_semaphore alloc_sem; 2879a36b4498SEric Sandeen ext4_grpblk_t bb_counters[]; /* Nr of free power-of-two-block 2880a36b4498SEric Sandeen * regions, index is order. 2881a36b4498SEric Sandeen * bb_counters[3] = 5 means 2882a36b4498SEric Sandeen * 5 free 8-block regions. */ 28835d1b1b3fSAneesh Kumar K.V }; 28845d1b1b3fSAneesh Kumar K.V 28855d1b1b3fSAneesh Kumar K.V #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 28863d56b8d2STao Ma #define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1 2887163a203dSDarrick J. Wong #define EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT 2 288887a39389SDarrick J. Wong #define EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT 3 2889db79e6d1SWang Shilong #define EXT4_GROUP_INFO_BBITMAP_CORRUPT \ 2890db79e6d1SWang Shilong (1 << EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT) 2891db79e6d1SWang Shilong #define EXT4_GROUP_INFO_IBITMAP_CORRUPT \ 2892db79e6d1SWang Shilong (1 << EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT) 28935d1b1b3fSAneesh Kumar K.V 28945d1b1b3fSAneesh Kumar K.V #define EXT4_MB_GRP_NEED_INIT(grp) \ 28955d1b1b3fSAneesh Kumar K.V (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) 2896163a203dSDarrick J. Wong #define EXT4_MB_GRP_BBITMAP_CORRUPT(grp) \ 2897163a203dSDarrick J. Wong (test_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 289887a39389SDarrick J. Wong #define EXT4_MB_GRP_IBITMAP_CORRUPT(grp) \ 289987a39389SDarrick J. Wong (test_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 29005d1b1b3fSAneesh Kumar K.V 29013d56b8d2STao Ma #define EXT4_MB_GRP_WAS_TRIMMED(grp) \ 29023d56b8d2STao Ma (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 29033d56b8d2STao Ma #define EXT4_MB_GRP_SET_TRIMMED(grp) \ 29043d56b8d2STao Ma (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 29053d56b8d2STao Ma #define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \ 29063d56b8d2STao Ma (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 29073d56b8d2STao Ma 290850797481STheodore Ts'o #define EXT4_MAX_CONTENTION 8 290950797481STheodore Ts'o #define EXT4_CONTENTION_THRESHOLD 2 291050797481STheodore Ts'o 2911955ce5f5SAneesh Kumar K.V static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb, 2912955ce5f5SAneesh Kumar K.V ext4_group_t group) 2913955ce5f5SAneesh Kumar K.V { 2914955ce5f5SAneesh Kumar K.V return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group); 2915955ce5f5SAneesh Kumar K.V } 2916955ce5f5SAneesh Kumar K.V 291750797481STheodore Ts'o /* 291850797481STheodore Ts'o * Returns true if the filesystem is busy enough that attempts to 291950797481STheodore Ts'o * access the block group locks has run into contention. 292050797481STheodore Ts'o */ 292150797481STheodore Ts'o static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi) 292250797481STheodore Ts'o { 292350797481STheodore Ts'o return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD); 292450797481STheodore Ts'o } 292550797481STheodore Ts'o 29265d1b1b3fSAneesh Kumar K.V static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group) 29275d1b1b3fSAneesh Kumar K.V { 292850797481STheodore Ts'o spinlock_t *lock = ext4_group_lock_ptr(sb, group); 292950797481STheodore Ts'o if (spin_trylock(lock)) 293050797481STheodore Ts'o /* 293150797481STheodore Ts'o * We're able to grab the lock right away, so drop the 293250797481STheodore Ts'o * lock contention counter. 293350797481STheodore Ts'o */ 293450797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0); 293550797481STheodore Ts'o else { 293650797481STheodore Ts'o /* 293750797481STheodore Ts'o * The lock is busy, so bump the contention counter, 293850797481STheodore Ts'o * and then wait on the spin lock. 293950797481STheodore Ts'o */ 294050797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1, 294150797481STheodore Ts'o EXT4_MAX_CONTENTION); 294250797481STheodore Ts'o spin_lock(lock); 294350797481STheodore Ts'o } 29445d1b1b3fSAneesh Kumar K.V } 29455d1b1b3fSAneesh Kumar K.V 29465d1b1b3fSAneesh Kumar K.V static inline void ext4_unlock_group(struct super_block *sb, 29475d1b1b3fSAneesh Kumar K.V ext4_group_t group) 29485d1b1b3fSAneesh Kumar K.V { 2949955ce5f5SAneesh Kumar K.V spin_unlock(ext4_group_lock_ptr(sb, group)); 29505d1b1b3fSAneesh Kumar K.V } 29515d1b1b3fSAneesh Kumar K.V 29523dcf5451SChristoph Hellwig /* 29531f7d1e77STheodore Ts'o * Block validity checking 29541f7d1e77STheodore Ts'o */ 29551f7d1e77STheodore Ts'o #define ext4_check_indirect_blockref(inode, bh) \ 29561f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 29571f7d1e77STheodore Ts'o (__le32 *)(bh)->b_data, \ 29581f7d1e77STheodore Ts'o EXT4_ADDR_PER_BLOCK((inode)->i_sb)) 29591f7d1e77STheodore Ts'o 29601f7d1e77STheodore Ts'o #define ext4_ind_check_inode(inode) \ 29611f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 29621f7d1e77STheodore Ts'o EXT4_I(inode)->i_data, \ 29631f7d1e77STheodore Ts'o EXT4_NDIR_BLOCKS) 29641f7d1e77STheodore Ts'o 29651f7d1e77STheodore Ts'o /* 29663dcf5451SChristoph Hellwig * Inodes and files operations 29673dcf5451SChristoph Hellwig */ 29683dcf5451SChristoph Hellwig 29693dcf5451SChristoph Hellwig /* dir.c */ 29703dcf5451SChristoph Hellwig extern const struct file_operations ext4_dir_operations; 29713dcf5451SChristoph Hellwig 29723dcf5451SChristoph Hellwig /* file.c */ 29733dcf5451SChristoph Hellwig extern const struct inode_operations ext4_file_inode_operations; 29743dcf5451SChristoph Hellwig extern const struct file_operations ext4_file_operations; 2975e0d10bfaSToshiyuki Okajima extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin); 29763dcf5451SChristoph Hellwig 297795eaefbdSTheodore Ts'o /* inline.c */ 297895eaefbdSTheodore Ts'o extern int ext4_get_max_inline_size(struct inode *inode); 297995eaefbdSTheodore Ts'o extern int ext4_find_inline_data_nolock(struct inode *inode); 298095eaefbdSTheodore Ts'o extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, 298195eaefbdSTheodore Ts'o unsigned int len); 298295eaefbdSTheodore Ts'o extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); 298395eaefbdSTheodore Ts'o 298495eaefbdSTheodore Ts'o extern int ext4_readpage_inline(struct inode *inode, struct page *page); 298595eaefbdSTheodore Ts'o extern int ext4_try_to_write_inline_data(struct address_space *mapping, 298695eaefbdSTheodore Ts'o struct inode *inode, 298795eaefbdSTheodore Ts'o loff_t pos, unsigned len, 298895eaefbdSTheodore Ts'o unsigned flags, 298995eaefbdSTheodore Ts'o struct page **pagep); 299095eaefbdSTheodore Ts'o extern int ext4_write_inline_data_end(struct inode *inode, 299195eaefbdSTheodore Ts'o loff_t pos, unsigned len, 299295eaefbdSTheodore Ts'o unsigned copied, 299395eaefbdSTheodore Ts'o struct page *page); 299495eaefbdSTheodore Ts'o extern struct buffer_head * 299595eaefbdSTheodore Ts'o ext4_journalled_write_inline_data(struct inode *inode, 299695eaefbdSTheodore Ts'o unsigned len, 299795eaefbdSTheodore Ts'o struct page *page); 299895eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_begin(struct address_space *mapping, 299995eaefbdSTheodore Ts'o struct inode *inode, 300095eaefbdSTheodore Ts'o loff_t pos, unsigned len, 300195eaefbdSTheodore Ts'o unsigned flags, 300295eaefbdSTheodore Ts'o struct page **pagep, 300395eaefbdSTheodore Ts'o void **fsdata); 300495eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, 300595eaefbdSTheodore Ts'o unsigned len, unsigned copied, 300695eaefbdSTheodore Ts'o struct page *page); 30075b643f9cSTheodore Ts'o extern int ext4_try_add_inline_entry(handle_t *handle, 30085b643f9cSTheodore Ts'o struct ext4_filename *fname, 300956a04915STheodore Ts'o struct inode *dir, struct inode *inode); 301095eaefbdSTheodore Ts'o extern int ext4_try_create_inline_dir(handle_t *handle, 301195eaefbdSTheodore Ts'o struct inode *parent, 301295eaefbdSTheodore Ts'o struct inode *inode); 301395eaefbdSTheodore Ts'o extern int ext4_read_inline_dir(struct file *filp, 3014725bebb2SAl Viro struct dir_context *ctx, 301595eaefbdSTheodore Ts'o int *has_inline_data); 30168af0f082STao Ma extern int htree_inlinedir_to_tree(struct file *dir_file, 30178af0f082STao Ma struct inode *dir, ext4_lblk_t block, 30188af0f082STao Ma struct dx_hash_info *hinfo, 30198af0f082STao Ma __u32 start_hash, __u32 start_minor_hash, 30208af0f082STao Ma int *has_inline_data); 302195eaefbdSTheodore Ts'o extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, 30225b643f9cSTheodore Ts'o struct ext4_filename *fname, 302395eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **res_dir, 302495eaefbdSTheodore Ts'o int *has_inline_data); 302595eaefbdSTheodore Ts'o extern int ext4_delete_inline_entry(handle_t *handle, 302695eaefbdSTheodore Ts'o struct inode *dir, 302795eaefbdSTheodore Ts'o struct ext4_dir_entry_2 *de_del, 302895eaefbdSTheodore Ts'o struct buffer_head *bh, 302995eaefbdSTheodore Ts'o int *has_inline_data); 3030a7550b30SJaegeuk Kim extern bool empty_inline_dir(struct inode *dir, int *has_inline_data); 303195eaefbdSTheodore Ts'o extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, 303295eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **parent_de, 303395eaefbdSTheodore Ts'o int *retval); 303495eaefbdSTheodore Ts'o extern int ext4_inline_data_fiemap(struct inode *inode, 303595eaefbdSTheodore Ts'o struct fiemap_extent_info *fieinfo, 3036d952d69eSDmitry Monakhov int *has_inline, __u64 start, __u64 len); 30377046ae35SAndreas Gruenbacher 30387046ae35SAndreas Gruenbacher struct iomap; 30397046ae35SAndreas Gruenbacher extern int ext4_inline_data_iomap(struct inode *inode, struct iomap *iomap); 30407046ae35SAndreas Gruenbacher 304101daf945STheodore Ts'o extern int ext4_inline_data_truncate(struct inode *inode, int *has_inline); 304295eaefbdSTheodore Ts'o 304395eaefbdSTheodore Ts'o extern int ext4_convert_inline_data(struct inode *inode); 304495eaefbdSTheodore Ts'o 304583447ccbSZheng Liu static inline int ext4_has_inline_data(struct inode *inode) 304683447ccbSZheng Liu { 304783447ccbSZheng Liu return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) && 304883447ccbSZheng Liu EXT4_I(inode)->i_inline_off; 304983447ccbSZheng Liu } 305083447ccbSZheng Liu 30513dcf5451SChristoph Hellwig /* namei.c */ 30523dcf5451SChristoph Hellwig extern const struct inode_operations ext4_dir_inode_operations; 30533dcf5451SChristoph Hellwig extern const struct inode_operations ext4_special_inode_operations; 3054596397b7STheodore Ts'o extern struct dentry *ext4_get_parent(struct dentry *child); 3055a774f9c2STao Ma extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode, 3056a774f9c2STao Ma struct ext4_dir_entry_2 *de, 3057a774f9c2STao Ma int blocksize, int csum_size, 3058a774f9c2STao Ma unsigned int parent_ino, int dotdot_real_len); 30593c47d541STao Ma extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t, 30603c47d541STao Ma unsigned int blocksize); 30613c47d541STao Ma extern int ext4_handle_dirty_dirent_node(handle_t *handle, 30623c47d541STao Ma struct inode *inode, 30633c47d541STao Ma struct buffer_head *bh); 30648af0f082STao Ma #define S_SHIFT 12 3065381cebfeSDan Carpenter static const unsigned char ext4_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = { 30668af0f082STao Ma [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE, 30678af0f082STao Ma [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR, 30688af0f082STao Ma [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV, 30698af0f082STao Ma [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV, 30708af0f082STao Ma [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO, 30718af0f082STao Ma [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK, 30728af0f082STao Ma [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK, 30738af0f082STao Ma }; 30748af0f082STao Ma 30758af0f082STao Ma static inline void ext4_set_de_type(struct super_block *sb, 30768af0f082STao Ma struct ext4_dir_entry_2 *de, 30778af0f082STao Ma umode_t mode) { 3078e2b911c5SDarrick J. Wong if (ext4_has_feature_filetype(sb)) 30798af0f082STao Ma de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; 30808af0f082STao Ma } 30818af0f082STao Ma 3082f64e02feSTheodore Ts'o /* readpages.c */ 3083f64e02feSTheodore Ts'o extern int ext4_mpage_readpages(struct address_space *mapping, 3084f64e02feSTheodore Ts'o struct list_head *pages, struct page *page, 3085ac22b46aSJens Axboe unsigned nr_pages, bool is_readahead); 30863dcf5451SChristoph Hellwig 30873dcf5451SChristoph Hellwig /* symlink.c */ 3088a7a67e8aSAl Viro extern const struct inode_operations ext4_encrypted_symlink_inode_operations; 30893dcf5451SChristoph Hellwig extern const struct inode_operations ext4_symlink_inode_operations; 30903dcf5451SChristoph Hellwig extern const struct inode_operations ext4_fast_symlink_inode_operations; 30913dcf5451SChristoph Hellwig 3092b5799018STheodore Ts'o /* sysfs.c */ 3093b5799018STheodore Ts'o extern int ext4_register_sysfs(struct super_block *sb); 3094ebd173beSTheodore Ts'o extern void ext4_unregister_sysfs(struct super_block *sb); 3095b5799018STheodore Ts'o extern int __init ext4_init_sysfs(void); 3096b5799018STheodore Ts'o extern void ext4_exit_sysfs(void); 3097b5799018STheodore Ts'o 30986fd058f7STheodore Ts'o /* block_validity */ 30996fd058f7STheodore Ts'o extern void ext4_release_system_zone(struct super_block *sb); 31006fd058f7STheodore Ts'o extern int ext4_setup_system_zone(struct super_block *sb); 31015dabfc78STheodore Ts'o extern int __init ext4_init_system_zone(void); 31025dabfc78STheodore Ts'o extern void ext4_exit_system_zone(void); 31036fd058f7STheodore Ts'o extern int ext4_data_block_valid(struct ext4_sb_info *sbi, 31046fd058f7STheodore Ts'o ext4_fsblk_t start_blk, 31056fd058f7STheodore Ts'o unsigned int count); 31061f7d1e77STheodore Ts'o extern int ext4_check_blockref(const char *, unsigned int, 31071f7d1e77STheodore Ts'o struct inode *, __le32 *, unsigned int); 31086fd058f7STheodore Ts'o 31093dcf5451SChristoph Hellwig /* extents.c */ 31104a092d73STheodore Ts'o struct ext4_ext_path; 31114a092d73STheodore Ts'o struct ext4_extent; 31124a092d73STheodore Ts'o 3113d7b2a00cSZheng Liu /* 3114d7b2a00cSZheng Liu * Maximum number of logical blocks in a file; ext4_extent's ee_block is 3115d7b2a00cSZheng Liu * __le32. 3116d7b2a00cSZheng Liu */ 3117d7b2a00cSZheng Liu #define EXT_MAX_BLOCKS 0xffffffff 3118d7b2a00cSZheng Liu 31193dcf5451SChristoph Hellwig extern int ext4_ext_tree_init(handle_t *handle, struct inode *); 31203dcf5451SChristoph Hellwig extern int ext4_ext_writepage_trans_blocks(struct inode *, int); 3121fffb2739SJan Kara extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents); 3122e35fd660STheodore Ts'o extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, 3123e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 3124d0abb36dSTheodore Ts'o extern int ext4_ext_truncate(handle_t *, struct inode *); 312526a4c0c6STheodore Ts'o extern int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start, 312626a4c0c6STheodore Ts'o ext4_lblk_t end); 31273dcf5451SChristoph Hellwig extern void ext4_ext_init(struct super_block *); 31283dcf5451SChristoph Hellwig extern void ext4_ext_release(struct super_block *); 31292fe17c10SChristoph Hellwig extern long ext4_fallocate(struct file *file, int mode, loff_t offset, 31303dcf5451SChristoph Hellwig loff_t len); 31316b523df4SJan Kara extern int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode, 31326b523df4SJan Kara loff_t offset, ssize_t len); 3133e35fd660STheodore Ts'o extern int ext4_map_blocks(handle_t *handle, struct inode *inode, 3134e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 31354a092d73STheodore Ts'o extern int ext4_ext_calc_metadata_amount(struct inode *inode, 31364a092d73STheodore Ts'o ext4_lblk_t lblocks); 31374a092d73STheodore Ts'o extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode, 31384a092d73STheodore Ts'o int num, 31394a092d73STheodore Ts'o struct ext4_ext_path *path); 31404a092d73STheodore Ts'o extern int ext4_can_extents_be_merged(struct inode *inode, 31414a092d73STheodore Ts'o struct ext4_extent *ex1, 31424a092d73STheodore Ts'o struct ext4_extent *ex2); 31434a092d73STheodore Ts'o extern int ext4_ext_insert_extent(handle_t *, struct inode *, 3144dfe50809STheodore Ts'o struct ext4_ext_path **, 31454a092d73STheodore Ts'o struct ext4_extent *, int); 3146ed8a1a76STheodore Ts'o extern struct ext4_ext_path *ext4_find_extent(struct inode *, ext4_lblk_t, 3147705912caSTheodore Ts'o struct ext4_ext_path **, 3148107a7bd3STheodore Ts'o int flags); 31494a092d73STheodore Ts'o extern void ext4_ext_drop_refs(struct ext4_ext_path *); 31504a092d73STheodore Ts'o extern int ext4_ext_check_inode(struct inode *inode); 3151fcf6b1b7SDmitry Monakhov extern ext4_lblk_t ext4_ext_next_allocated_block(struct ext4_ext_path *path); 31523a06d778SAneesh Kumar K.V extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 31533a06d778SAneesh Kumar K.V __u64 start, __u64 len); 31547869a4a6STheodore Ts'o extern int ext4_ext_precache(struct inode *inode); 31559eb79482SNamjae Jeon extern int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len); 3156331573feSNamjae Jeon extern int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len); 3157fcf6b1b7SDmitry Monakhov extern int ext4_swap_extents(handle_t *handle, struct inode *inode1, 3158fcf6b1b7SDmitry Monakhov struct inode *inode2, ext4_lblk_t lblk1, 3159fcf6b1b7SDmitry Monakhov ext4_lblk_t lblk2, ext4_lblk_t count, 3160fcf6b1b7SDmitry Monakhov int mark_unwritten,int *err); 31610b02f4c0SEric Whitney extern int ext4_clu_mapped(struct inode *inode, ext4_lblk_t lclu); 31624a092d73STheodore Ts'o 3163748de673SAkira Fujita /* move_extent.c */ 3164393d1d1dSDr. Tilmann Bubeck extern void ext4_double_down_write_data_sem(struct inode *first, 3165393d1d1dSDr. Tilmann Bubeck struct inode *second); 3166393d1d1dSDr. Tilmann Bubeck extern void ext4_double_up_write_data_sem(struct inode *orig_inode, 3167393d1d1dSDr. Tilmann Bubeck struct inode *donor_inode); 3168748de673SAkira Fujita extern int ext4_move_extents(struct file *o_filp, struct file *d_filp, 3169748de673SAkira Fujita __u64 start_orig, __u64 start_donor, 3170748de673SAkira Fujita __u64 len, __u64 *moved_len); 3171748de673SAkira Fujita 3172bd2d0210STheodore Ts'o /* page-io.c */ 31735dabfc78STheodore Ts'o extern int __init ext4_init_pageio(void); 31745dabfc78STheodore Ts'o extern void ext4_exit_pageio(void); 3175bd2d0210STheodore Ts'o extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags); 317697a851edSJan Kara extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end); 317797a851edSJan Kara extern int ext4_put_io_end(ext4_io_end_t *io_end); 317897a851edSJan Kara extern void ext4_put_io_end_defer(ext4_io_end_t *io_end); 317997a851edSJan Kara extern void ext4_io_submit_init(struct ext4_io_submit *io, 318097a851edSJan Kara struct writeback_control *wbc); 31812e8fa54eSJan Kara extern void ext4_end_io_rsv_work(struct work_struct *work); 3182bd2d0210STheodore Ts'o extern void ext4_io_submit(struct ext4_io_submit *io); 3183bd2d0210STheodore Ts'o extern int ext4_bio_write_page(struct ext4_io_submit *io, 3184bd2d0210STheodore Ts'o struct page *page, 3185bd2d0210STheodore Ts'o int len, 31861c8349a1SNamjae Jeon struct writeback_control *wbc, 31871c8349a1SNamjae Jeon bool keep_towrite); 31883a06d778SAneesh Kumar K.V 3189c5e06d10SJohann Lombardi /* mmp.c */ 3190c5e06d10SJohann Lombardi extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t); 3191c5e06d10SJohann Lombardi 31923613d228SJan Kara /* 319348fc7f7eSAdam Buchbinder * Add new method to test whether block and inode bitmaps are properly 31942ccb5fb9SAneesh Kumar K.V * initialized. With uninit_bg reading the block from disk is not enough 31952ccb5fb9SAneesh Kumar K.V * to mark the bitmap uptodate. We need to also zero-out the bitmap 31962ccb5fb9SAneesh Kumar K.V */ 31972ccb5fb9SAneesh Kumar K.V #define BH_BITMAP_UPTODATE BH_JBDPrivateStart 31982ccb5fb9SAneesh Kumar K.V 31992ccb5fb9SAneesh Kumar K.V static inline int bitmap_uptodate(struct buffer_head *bh) 32002ccb5fb9SAneesh Kumar K.V { 32012ccb5fb9SAneesh Kumar K.V return (buffer_uptodate(bh) && 32022ccb5fb9SAneesh Kumar K.V test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state)); 32032ccb5fb9SAneesh Kumar K.V } 32042ccb5fb9SAneesh Kumar K.V static inline void set_bitmap_uptodate(struct buffer_head *bh) 32052ccb5fb9SAneesh Kumar K.V { 32062ccb5fb9SAneesh Kumar K.V set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state); 32072ccb5fb9SAneesh Kumar K.V } 32082ccb5fb9SAneesh Kumar K.V 3209731eb1a0SAkinobu Mita #define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1) 3210731eb1a0SAkinobu Mita 3211e9e3bcecSEric Sandeen /* For ioend & aio unwritten conversion wait queues */ 3212e9e3bcecSEric Sandeen #define EXT4_WQ_HASH_SZ 37 3213e9e3bcecSEric Sandeen #define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\ 3214e9e3bcecSEric Sandeen EXT4_WQ_HASH_SZ]) 3215e9e3bcecSEric Sandeen extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 3216e9e3bcecSEric Sandeen 32178f82f840SYongqiang Yang extern int ext4_resize_begin(struct super_block *sb); 32188f82f840SYongqiang Yang extern void ext4_resize_end(struct super_block *sb); 32198f82f840SYongqiang Yang 322074c66bcbSJan Kara static inline void ext4_set_io_unwritten_flag(struct inode *inode, 322174c66bcbSJan Kara struct ext4_io_end *io_end) 322274c66bcbSJan Kara { 322374c66bcbSJan Kara if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) { 322474c66bcbSJan Kara io_end->flag |= EXT4_IO_END_UNWRITTEN; 322574c66bcbSJan Kara atomic_inc(&EXT4_I(inode)->i_unwritten); 322674c66bcbSJan Kara } 322774c66bcbSJan Kara } 322874c66bcbSJan Kara 322974c66bcbSJan Kara static inline void ext4_clear_io_unwritten_flag(ext4_io_end_t *io_end) 323074c66bcbSJan Kara { 323174c66bcbSJan Kara struct inode *inode = io_end->inode; 323274c66bcbSJan Kara 323374c66bcbSJan Kara if (io_end->flag & EXT4_IO_END_UNWRITTEN) { 323474c66bcbSJan Kara io_end->flag &= ~EXT4_IO_END_UNWRITTEN; 323574c66bcbSJan Kara /* Wake up anyone waiting on unwritten extent conversion */ 323674c66bcbSJan Kara if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten)) 323774c66bcbSJan Kara wake_up_all(ext4_ioend_wq(inode)); 323874c66bcbSJan Kara } 323974c66bcbSJan Kara } 324074c66bcbSJan Kara 32418ff6daa1SChristoph Hellwig extern const struct iomap_ops ext4_iomap_ops; 3242364443cbSJan Kara 32433dcf5451SChristoph Hellwig #endif /* __KERNEL__ */ 32443dcf5451SChristoph Hellwig 32456a797d27SDarrick J. Wong #define EFSBADCRC EBADMSG /* Bad CRC detected */ 32466a797d27SDarrick J. Wong #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 32476a797d27SDarrick J. Wong 32483dcf5451SChristoph Hellwig #endif /* _EXT4_H */ 3249