13dcf5451SChristoph Hellwig /* 23dcf5451SChristoph Hellwig * ext4.h 33dcf5451SChristoph Hellwig * 43dcf5451SChristoph Hellwig * Copyright (C) 1992, 1993, 1994, 1995 53dcf5451SChristoph Hellwig * Remy Card (card@masi.ibp.fr) 63dcf5451SChristoph Hellwig * Laboratoire MASI - Institut Blaise Pascal 73dcf5451SChristoph Hellwig * Universite Pierre et Marie Curie (Paris VI) 83dcf5451SChristoph Hellwig * 93dcf5451SChristoph Hellwig * from 103dcf5451SChristoph Hellwig * 113dcf5451SChristoph Hellwig * linux/include/linux/minix_fs.h 123dcf5451SChristoph Hellwig * 133dcf5451SChristoph Hellwig * Copyright (C) 1991, 1992 Linus Torvalds 143dcf5451SChristoph Hellwig */ 153dcf5451SChristoph Hellwig 163dcf5451SChristoph Hellwig #ifndef _EXT4_H 173dcf5451SChristoph Hellwig #define _EXT4_H 183dcf5451SChristoph Hellwig 193dcf5451SChristoph Hellwig #include <linux/types.h> 203dcf5451SChristoph Hellwig #include <linux/blkdev.h> 213dcf5451SChristoph Hellwig #include <linux/magic.h> 222ccb5fb9SAneesh Kumar K.V #include <linux/jbd2.h> 2360e58e0fSMingming Cao #include <linux/quota.h> 24d444c3c3STheodore Ts'o #include <linux/rwsem.h> 25d444c3c3STheodore Ts'o #include <linux/rbtree.h> 26d444c3c3STheodore Ts'o #include <linux/seqlock.h> 27d444c3c3STheodore Ts'o #include <linux/mutex.h> 28ca0faba0STheodore Ts'o #include <linux/timer.h> 29a4dad1aeSDavid Turner #include <linux/version.h> 30ca0faba0STheodore Ts'o #include <linux/wait.h> 31174cd4b1SIngo Molnar #include <linux/sched/signal.h> 32ca0faba0STheodore Ts'o #include <linux/blockgroup_lock.h> 33ca0faba0STheodore Ts'o #include <linux/percpu_counter.h> 34efbed4dcSTheodore Ts'o #include <linux/ratelimit.h> 350441984aSDarrick J. Wong #include <crypto/hash.h> 3646f47e48SEric Biggers #ifdef CONFIG_EXT4_FS_ENCRYPTION 3746f47e48SEric Biggers #include <linux/fscrypt_supp.h> 3846f47e48SEric Biggers #else 3946f47e48SEric Biggers #include <linux/fscrypt_notsupp.h> 4046f47e48SEric Biggers #endif 41a633f5a3SLukas Czerner #include <linux/falloc.h> 42c8585c6fSDaeho Jeong #include <linux/percpu-rwsem.h> 434d92dc0fSBen Hutchings #ifdef __KERNEL__ 444d92dc0fSBen Hutchings #include <linux/compat.h> 454d92dc0fSBen Hutchings #endif 463dcf5451SChristoph Hellwig 473dcf5451SChristoph Hellwig /* 488a35694eSShen Feng * The fourth extended filesystem constants/structures 493dcf5451SChristoph Hellwig */ 503dcf5451SChristoph Hellwig 513dcf5451SChristoph Hellwig /* 52a2821e34SAihua Zhang * with AGGRESSIVE_CHECK allocator runs consistency checks over 53a2821e34SAihua Zhang * structures. these checks slow things down a lot 54a2821e34SAihua Zhang */ 55a2821e34SAihua Zhang #define AGGRESSIVE_CHECK__ 56a2821e34SAihua Zhang 57a2821e34SAihua Zhang /* 58a2821e34SAihua Zhang * with DOUBLE_CHECK defined mballoc creates persistent in-core 59a2821e34SAihua Zhang * bitmaps, maintains and uses them to check for double allocations 60a2821e34SAihua Zhang */ 61a2821e34SAihua Zhang #define DOUBLE_CHECK__ 62a2821e34SAihua Zhang 63a2821e34SAihua Zhang /* 643dcf5451SChristoph Hellwig * Define EXT4FS_DEBUG to produce debug messages 653dcf5451SChristoph Hellwig */ 663dcf5451SChristoph Hellwig #undef EXT4FS_DEBUG 673dcf5451SChristoph Hellwig 683dcf5451SChristoph Hellwig /* 693dcf5451SChristoph Hellwig * Debug code 703dcf5451SChristoph Hellwig */ 713dcf5451SChristoph Hellwig #ifdef EXT4FS_DEBUG 723dcf5451SChristoph Hellwig #define ext4_debug(f, a...) \ 733dcf5451SChristoph Hellwig do { \ 743dcf5451SChristoph Hellwig printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ 754db9c54aSStoyan Gaydarov __FILE__, __LINE__, __func__); \ 763dcf5451SChristoph Hellwig printk(KERN_DEBUG f, ## a); \ 773dcf5451SChristoph Hellwig } while (0) 783dcf5451SChristoph Hellwig #else 79ace36ad4SJoe Perches #define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) 803dcf5451SChristoph Hellwig #endif 813dcf5451SChristoph Hellwig 824a092d73STheodore Ts'o /* 834a092d73STheodore Ts'o * Turn on EXT_DEBUG to get lots of info about extents operations. 844a092d73STheodore Ts'o */ 854a092d73STheodore Ts'o #define EXT_DEBUG__ 864a092d73STheodore Ts'o #ifdef EXT_DEBUG 874a092d73STheodore Ts'o #define ext_debug(fmt, ...) printk(fmt, ##__VA_ARGS__) 884a092d73STheodore Ts'o #else 894a092d73STheodore Ts'o #define ext_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) 904a092d73STheodore Ts'o #endif 914a092d73STheodore Ts'o 92d444c3c3STheodore Ts'o /* data type for block offset of block group */ 93d444c3c3STheodore Ts'o typedef int ext4_grpblk_t; 94d444c3c3STheodore Ts'o 95d444c3c3STheodore Ts'o /* data type for filesystem-wide blocks number */ 96d444c3c3STheodore Ts'o typedef unsigned long long ext4_fsblk_t; 97d444c3c3STheodore Ts'o 98d444c3c3STheodore Ts'o /* data type for file logical block number */ 99d444c3c3STheodore Ts'o typedef __u32 ext4_lblk_t; 100d444c3c3STheodore Ts'o 101d444c3c3STheodore Ts'o /* data type for block group number */ 102d444c3c3STheodore Ts'o typedef unsigned int ext4_group_t; 103d444c3c3STheodore Ts'o 104331573feSNamjae Jeon enum SHIFT_DIRECTION { 105331573feSNamjae Jeon SHIFT_LEFT = 0, 106331573feSNamjae Jeon SHIFT_RIGHT, 107331573feSNamjae Jeon }; 108331573feSNamjae Jeon 109296c355cSTheodore Ts'o /* 110296c355cSTheodore Ts'o * Flags used in mballoc's allocation_context flags field. 111296c355cSTheodore Ts'o * 112296c355cSTheodore Ts'o * Also used to show what's going on for debugging purposes when the 113296c355cSTheodore Ts'o * flag field is exported via the traceport interface 114296c355cSTheodore Ts'o */ 115d444c3c3STheodore Ts'o 1163dcf5451SChristoph Hellwig /* prefer goal again. length */ 1170ef90db9STheodore Ts'o #define EXT4_MB_HINT_MERGE 0x0001 1183dcf5451SChristoph Hellwig /* blocks already reserved */ 1190ef90db9STheodore Ts'o #define EXT4_MB_HINT_RESERVED 0x0002 1203dcf5451SChristoph Hellwig /* metadata is being allocated */ 1210ef90db9STheodore Ts'o #define EXT4_MB_HINT_METADATA 0x0004 1223dcf5451SChristoph Hellwig /* first blocks in the file */ 1230ef90db9STheodore Ts'o #define EXT4_MB_HINT_FIRST 0x0008 1243dcf5451SChristoph Hellwig /* search for the best chunk */ 1250ef90db9STheodore Ts'o #define EXT4_MB_HINT_BEST 0x0010 1263dcf5451SChristoph Hellwig /* data is being allocated */ 1270ef90db9STheodore Ts'o #define EXT4_MB_HINT_DATA 0x0020 1283dcf5451SChristoph Hellwig /* don't preallocate (for tails) */ 1290ef90db9STheodore Ts'o #define EXT4_MB_HINT_NOPREALLOC 0x0040 1303dcf5451SChristoph Hellwig /* allocate for locality group */ 1310ef90db9STheodore Ts'o #define EXT4_MB_HINT_GROUP_ALLOC 0x0080 1323dcf5451SChristoph Hellwig /* allocate goal blocks or none */ 1330ef90db9STheodore Ts'o #define EXT4_MB_HINT_GOAL_ONLY 0x0100 1343dcf5451SChristoph Hellwig /* goal is meaningful */ 1350ef90db9STheodore Ts'o #define EXT4_MB_HINT_TRY_GOAL 0x0200 136d2a17637SMingming Cao /* blocks already pre-reserved by delayed allocation */ 1370ef90db9STheodore Ts'o #define EXT4_MB_DELALLOC_RESERVED 0x0400 1384ba74d00STheodore Ts'o /* We are doing stream allocation */ 1394ba74d00STheodore Ts'o #define EXT4_MB_STREAM_ALLOC 0x0800 14055f020dbSAllison Henderson /* Use reserved root blocks if needed */ 14155f020dbSAllison Henderson #define EXT4_MB_USE_ROOT_BLOCKS 0x1000 14227dd4385SLukas Czerner /* Use blocks from reserved pool */ 14327dd4385SLukas Czerner #define EXT4_MB_USE_RESERVED 0x2000 1443dcf5451SChristoph Hellwig 1453dcf5451SChristoph Hellwig struct ext4_allocation_request { 1463dcf5451SChristoph Hellwig /* target inode for block we're allocating */ 1473dcf5451SChristoph Hellwig struct inode *inode; 1483dcf5451SChristoph Hellwig /* how many blocks we want to allocate */ 149498e5f24STheodore Ts'o unsigned int len; 150726447d8SEric Sandeen /* logical block in target inode */ 151726447d8SEric Sandeen ext4_lblk_t logical; 152726447d8SEric Sandeen /* the closest logical allocated block to the left */ 153726447d8SEric Sandeen ext4_lblk_t lleft; 154726447d8SEric Sandeen /* the closest logical allocated block to the right */ 155726447d8SEric Sandeen ext4_lblk_t lright; 156726447d8SEric Sandeen /* phys. target (a hint) */ 157726447d8SEric Sandeen ext4_fsblk_t goal; 158726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the left */ 159726447d8SEric Sandeen ext4_fsblk_t pleft; 160726447d8SEric Sandeen /* phys. block for the closest logical allocated block to the right */ 161726447d8SEric Sandeen ext4_fsblk_t pright; 1623dcf5451SChristoph Hellwig /* flags. see above EXT4_MB_HINT_* */ 163498e5f24STheodore Ts'o unsigned int flags; 1643dcf5451SChristoph Hellwig }; 1653dcf5451SChristoph Hellwig 1663dcf5451SChristoph Hellwig /* 167e35fd660STheodore Ts'o * Logical to physical block mapping, used by ext4_map_blocks() 168e35fd660STheodore Ts'o * 169e35fd660STheodore Ts'o * This structure is used to pass requests into ext4_map_blocks() as 170e35fd660STheodore Ts'o * well as to store the information returned by ext4_map_blocks(). It 171e35fd660STheodore Ts'o * takes less room on the stack than a struct buffer_head. 172e35fd660STheodore Ts'o */ 173e35fd660STheodore Ts'o #define EXT4_MAP_NEW (1 << BH_New) 174e35fd660STheodore Ts'o #define EXT4_MAP_MAPPED (1 << BH_Mapped) 175e35fd660STheodore Ts'o #define EXT4_MAP_UNWRITTEN (1 << BH_Unwritten) 176e35fd660STheodore Ts'o #define EXT4_MAP_BOUNDARY (1 << BH_Boundary) 177e35fd660STheodore Ts'o #define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\ 178cbd7584eSJan Kara EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY) 179e35fd660STheodore Ts'o 180e35fd660STheodore Ts'o struct ext4_map_blocks { 181e35fd660STheodore Ts'o ext4_fsblk_t m_pblk; 182e35fd660STheodore Ts'o ext4_lblk_t m_lblk; 183e35fd660STheodore Ts'o unsigned int m_len; 184e35fd660STheodore Ts'o unsigned int m_flags; 185e35fd660STheodore Ts'o }; 186e35fd660STheodore Ts'o 187e35fd660STheodore Ts'o /* 188bd2d0210STheodore Ts'o * Flags for ext4_io_end->flags 189bd2d0210STheodore Ts'o */ 190bd2d0210STheodore Ts'o #define EXT4_IO_END_UNWRITTEN 0x0001 191bd2d0210STheodore Ts'o 1924188188bSCurt Wohlgemuth /* 193556615dcSLukas Czerner * For converting unwritten extents on a work queue. 'handle' is used for 1946b523df4SJan Kara * buffered writeback. 1954188188bSCurt Wohlgemuth */ 1960031462bSMingming Cao typedef struct ext4_io_end { 1975b3ff237Sjiayingz@google.com (Jiaying Zhang) struct list_head list; /* per-file finished IO list */ 1986b523df4SJan Kara handle_t *handle; /* handle reserved for extent 1996b523df4SJan Kara * conversion */ 2000031462bSMingming Cao struct inode *inode; /* file being written to */ 201b0857d30SJan Kara struct bio *bio; /* Linked list of completed 202b0857d30SJan Kara * bios covering the extent */ 2038d5d02e6SMingming Cao unsigned int flag; /* unwritten or not */ 2043bd6ad7bSJan Kara atomic_t count; /* reference counter */ 205a1de02dcSEric Sandeen loff_t offset; /* offset in the file */ 206a1de02dcSEric Sandeen ssize_t size; /* size of the extent */ 2070031462bSMingming Cao } ext4_io_end_t; 2080031462bSMingming Cao 209bd2d0210STheodore Ts'o struct ext4_io_submit { 2105a33911fSTejun Heo struct writeback_control *io_wbc; 211bd2d0210STheodore Ts'o struct bio *io_bio; 212bd2d0210STheodore Ts'o ext4_io_end_t *io_end; 213bd2d0210STheodore Ts'o sector_t io_next_block; 214bd2d0210STheodore Ts'o }; 215bd2d0210STheodore Ts'o 216b3a3ca8cSTheodore Ts'o /* 2173dcf5451SChristoph Hellwig * Special inodes numbers 2183dcf5451SChristoph Hellwig */ 2193dcf5451SChristoph Hellwig #define EXT4_BAD_INO 1 /* Bad blocks inode */ 2203dcf5451SChristoph Hellwig #define EXT4_ROOT_INO 2 /* Root inode */ 221ae812306SAditya Kali #define EXT4_USR_QUOTA_INO 3 /* User quota inode */ 222ae812306SAditya Kali #define EXT4_GRP_QUOTA_INO 4 /* Group quota inode */ 2233dcf5451SChristoph Hellwig #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ 2243dcf5451SChristoph Hellwig #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ 2253dcf5451SChristoph Hellwig #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ 2263dcf5451SChristoph Hellwig #define EXT4_JOURNAL_INO 8 /* Journal inode */ 2273dcf5451SChristoph Hellwig 2283dcf5451SChristoph Hellwig /* First non-reserved inode for old ext4 filesystems */ 2293dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_FIRST_INO 11 2303dcf5451SChristoph Hellwig 2313dcf5451SChristoph Hellwig /* 2323dcf5451SChristoph Hellwig * Maximal count of links to a file 2333dcf5451SChristoph Hellwig */ 2343dcf5451SChristoph Hellwig #define EXT4_LINK_MAX 65000 2353dcf5451SChristoph Hellwig 2363dcf5451SChristoph Hellwig /* 2373dcf5451SChristoph Hellwig * Macro-instructions used to manage several block sizes 2383dcf5451SChristoph Hellwig */ 2393dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_SIZE 1024 2403dcf5451SChristoph Hellwig #define EXT4_MAX_BLOCK_SIZE 65536 2413dcf5451SChristoph Hellwig #define EXT4_MIN_BLOCK_LOG_SIZE 10 242fb1813f4SCurt Wohlgemuth #define EXT4_MAX_BLOCK_LOG_SIZE 16 2439e47a4c9STheodore Ts'o #define EXT4_MAX_CLUSTER_LOG_SIZE 30 2443dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2453dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) 2463dcf5451SChristoph Hellwig #else 2473dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) 2483dcf5451SChristoph Hellwig #endif 2493dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32)) 250281b5995STheodore Ts'o #define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \ 251281b5995STheodore Ts'o EXT4_SB(s)->s_cluster_bits) 2523dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2533dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) 254281b5995STheodore Ts'o # define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits) 2553dcf5451SChristoph Hellwig #else 2563dcf5451SChristoph Hellwig # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) 2573dcf5451SChristoph Hellwig #endif 2583dcf5451SChristoph Hellwig #ifdef __KERNEL__ 2593dcf5451SChristoph Hellwig #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) 2603dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) 2613dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) 2623dcf5451SChristoph Hellwig #else 2633dcf5451SChristoph Hellwig #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 2643dcf5451SChristoph Hellwig EXT4_GOOD_OLD_INODE_SIZE : \ 2653dcf5451SChristoph Hellwig (s)->s_inode_size) 2663dcf5451SChristoph Hellwig #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ 2673dcf5451SChristoph Hellwig EXT4_GOOD_OLD_FIRST_INO : \ 2683dcf5451SChristoph Hellwig (s)->s_first_ino) 2693dcf5451SChristoph Hellwig #endif 2703dcf5451SChristoph Hellwig #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) 271518eaa63SFabian Frederick #define EXT4_MAX_BLOCKS(size, offset, blkbits) \ 272518eaa63SFabian Frederick ((EXT4_BLOCK_ALIGN(size + offset, blkbits) >> blkbits) - (offset >> \ 273518eaa63SFabian Frederick blkbits)) 2743dcf5451SChristoph Hellwig 275d5b8f310STheodore Ts'o /* Translate a block number to a cluster number */ 276d5b8f310STheodore Ts'o #define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits) 277d5b8f310STheodore Ts'o /* Translate a cluster number to a block number */ 278d5b8f310STheodore Ts'o #define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits) 279d5b8f310STheodore Ts'o /* Translate # of blks to # of clusters */ 280d5b8f310STheodore Ts'o #define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \ 281d5b8f310STheodore Ts'o (sbi)->s_cluster_bits) 282f5a44db5STheodore Ts'o /* Mask out the low bits to get the starting block of the cluster */ 283f5a44db5STheodore Ts'o #define EXT4_PBLK_CMASK(s, pblk) ((pblk) & \ 284f5a44db5STheodore Ts'o ~((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 285f5a44db5STheodore Ts'o #define EXT4_LBLK_CMASK(s, lblk) ((lblk) & \ 286f5a44db5STheodore Ts'o ~((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 287f5a44db5STheodore Ts'o /* Get the cluster offset */ 288f5a44db5STheodore Ts'o #define EXT4_PBLK_COFF(s, pblk) ((pblk) & \ 289f5a44db5STheodore Ts'o ((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) 290f5a44db5STheodore Ts'o #define EXT4_LBLK_COFF(s, lblk) ((lblk) & \ 291f5a44db5STheodore Ts'o ((ext4_lblk_t) (s)->s_cluster_ratio - 1)) 292d5b8f310STheodore Ts'o 2933dcf5451SChristoph Hellwig /* 2943dcf5451SChristoph Hellwig * Structure of a blocks group descriptor 2953dcf5451SChristoph Hellwig */ 2963dcf5451SChristoph Hellwig struct ext4_group_desc 2973dcf5451SChristoph Hellwig { 2983dcf5451SChristoph Hellwig __le32 bg_block_bitmap_lo; /* Blocks bitmap block */ 2993dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ 3003dcf5451SChristoph Hellwig __le32 bg_inode_table_lo; /* Inodes table block */ 301560671a0SAneesh Kumar K.V __le16 bg_free_blocks_count_lo;/* Free blocks count */ 302560671a0SAneesh Kumar K.V __le16 bg_free_inodes_count_lo;/* Free inodes count */ 303560671a0SAneesh Kumar K.V __le16 bg_used_dirs_count_lo; /* Directories count */ 3043dcf5451SChristoph Hellwig __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ 305e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_lo; /* Exclude bitmap for snapshots */ 306e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+bbitmap) LE */ 307e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+ibitmap) LE */ 308560671a0SAneesh Kumar K.V __le16 bg_itable_unused_lo; /* Unused inodes count */ 3093dcf5451SChristoph Hellwig __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ 3103dcf5451SChristoph Hellwig __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ 3113dcf5451SChristoph Hellwig __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ 3123dcf5451SChristoph Hellwig __le32 bg_inode_table_hi; /* Inodes table block MSB */ 3133dcf5451SChristoph Hellwig __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */ 3143dcf5451SChristoph Hellwig __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */ 3153dcf5451SChristoph Hellwig __le16 bg_used_dirs_count_hi; /* Directories count MSB */ 3163dcf5451SChristoph Hellwig __le16 bg_itable_unused_hi; /* Unused inodes count MSB */ 317e6153918SDarrick J. Wong __le32 bg_exclude_bitmap_hi; /* Exclude bitmap block MSB */ 318e6153918SDarrick J. Wong __le16 bg_block_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+bbitmap) BE */ 319e6153918SDarrick J. Wong __le16 bg_inode_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+ibitmap) BE */ 320e6153918SDarrick J. Wong __u32 bg_reserved; 3213dcf5451SChristoph Hellwig }; 3223dcf5451SChristoph Hellwig 32341a246d1SDarrick J. Wong #define EXT4_BG_INODE_BITMAP_CSUM_HI_END \ 32441a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \ 32541a246d1SDarrick J. Wong sizeof(__le16)) 32641a246d1SDarrick J. Wong #define EXT4_BG_BLOCK_BITMAP_CSUM_HI_END \ 32741a246d1SDarrick J. Wong (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \ 32841a246d1SDarrick J. Wong sizeof(__le16)) 32941a246d1SDarrick J. Wong 330772cb7c8SJose R. Santos /* 331772cb7c8SJose R. Santos * Structure of a flex block group info 332772cb7c8SJose R. Santos */ 333772cb7c8SJose R. Santos 334772cb7c8SJose R. Santos struct flex_groups { 33590ba983fSTheodore Ts'o atomic64_t free_clusters; 3369f24e420STheodore Ts'o atomic_t free_inodes; 3377d39db14STheodore Ts'o atomic_t used_dirs; 338772cb7c8SJose R. Santos }; 339772cb7c8SJose R. Santos 3403dcf5451SChristoph Hellwig #define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ 3413dcf5451SChristoph Hellwig #define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ 3423dcf5451SChristoph Hellwig #define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ 3433dcf5451SChristoph Hellwig 3443dcf5451SChristoph Hellwig /* 3453dcf5451SChristoph Hellwig * Macro-instructions used to manage group descriptors 3463dcf5451SChristoph Hellwig */ 3473dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE 32 3483dcf5451SChristoph Hellwig #define EXT4_MIN_DESC_SIZE_64BIT 64 3493dcf5451SChristoph Hellwig #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE 3503dcf5451SChristoph Hellwig #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) 3513dcf5451SChristoph Hellwig #ifdef __KERNEL__ 3523dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) 353281b5995STheodore Ts'o # define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group) 3543dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) 3553dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) 3563dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) 3573dcf5451SChristoph Hellwig #else 3583dcf5451SChristoph Hellwig # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) 3593dcf5451SChristoph Hellwig # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) 3603dcf5451SChristoph Hellwig # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) 3613dcf5451SChristoph Hellwig #endif 3623dcf5451SChristoph Hellwig 3633dcf5451SChristoph Hellwig /* 3643dcf5451SChristoph Hellwig * Constants relative to the data blocks 3653dcf5451SChristoph Hellwig */ 3663dcf5451SChristoph Hellwig #define EXT4_NDIR_BLOCKS 12 3673dcf5451SChristoph Hellwig #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS 3683dcf5451SChristoph Hellwig #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) 3693dcf5451SChristoph Hellwig #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) 3703dcf5451SChristoph Hellwig #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) 3713dcf5451SChristoph Hellwig 3723dcf5451SChristoph Hellwig /* 3733dcf5451SChristoph Hellwig * Inode flags 3743dcf5451SChristoph Hellwig */ 3753dcf5451SChristoph Hellwig #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ 3763dcf5451SChristoph Hellwig #define EXT4_UNRM_FL 0x00000002 /* Undelete */ 3773dcf5451SChristoph Hellwig #define EXT4_COMPR_FL 0x00000004 /* Compress file */ 3783dcf5451SChristoph Hellwig #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ 3793dcf5451SChristoph Hellwig #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ 3803dcf5451SChristoph Hellwig #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ 3813dcf5451SChristoph Hellwig #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ 3823dcf5451SChristoph Hellwig #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ 3833dcf5451SChristoph Hellwig /* Reserved for compression usage... */ 3843dcf5451SChristoph Hellwig #define EXT4_DIRTY_FL 0x00000100 3853dcf5451SChristoph Hellwig #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 3863dcf5451SChristoph Hellwig #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ 3873edc18d8STheodore Ts'o /* nb: was previously EXT2_ECOMPR_FL */ 3883edc18d8STheodore Ts'o #define EXT4_ENCRYPT_FL 0x00000800 /* encrypted file */ 3893dcf5451SChristoph Hellwig /* End compression flags --- maybe not all used */ 3903dcf5451SChristoph Hellwig #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ 3913dcf5451SChristoph Hellwig #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ 3923dcf5451SChristoph Hellwig #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ 3933dcf5451SChristoph Hellwig #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 3943dcf5451SChristoph Hellwig #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ 3953dcf5451SChristoph Hellwig #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 3963dcf5451SChristoph Hellwig #define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ 3973dcf5451SChristoph Hellwig #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ 398f710b4b9STheodore Ts'o #define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ 399c8d46e41SJiaying Zhang #define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */ 40067cf5b09STao Ma #define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */ 4018b4953e1STheodore Ts'o #define EXT4_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ 4023dcf5451SChristoph Hellwig #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ 4033dcf5451SChristoph Hellwig 404040cb378SLi Xi #define EXT4_FL_USER_VISIBLE 0x304BDFFF /* User visible flags */ 405f8011d93SJan Kara #define EXT4_FL_USER_MODIFIABLE 0x204BC0FF /* User modifiable flags */ 4063dcf5451SChristoph Hellwig 407d14e7683SJan Kara /* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */ 4089b7365fcSLi Xi #define EXT4_FL_XFLAG_VISIBLE (EXT4_SYNC_FL | \ 4099b7365fcSLi Xi EXT4_IMMUTABLE_FL | \ 4109b7365fcSLi Xi EXT4_APPEND_FL | \ 4119b7365fcSLi Xi EXT4_NODUMP_FL | \ 4129b7365fcSLi Xi EXT4_NOATIME_FL | \ 4139b7365fcSLi Xi EXT4_PROJINHERIT_FL) 4149b7365fcSLi Xi 4158fa43a81SDuane Griffin /* Flags that should be inherited by new inodes from their parent. */ 4168fa43a81SDuane Griffin #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\ 4171cd9f097STheodore Ts'o EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\ 4188fa43a81SDuane Griffin EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\ 419040cb378SLi Xi EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL |\ 420040cb378SLi Xi EXT4_PROJINHERIT_FL) 4218fa43a81SDuane Griffin 4222dc6b0d4SDuane Griffin /* Flags that are appropriate for regular files (all but dir-specific ones). */ 4232dc6b0d4SDuane Griffin #define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL)) 4242dc6b0d4SDuane Griffin 4252dc6b0d4SDuane Griffin /* Flags that are appropriate for non-directories/regular files. */ 4262dc6b0d4SDuane Griffin #define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL) 4272dc6b0d4SDuane Griffin 4282dc6b0d4SDuane Griffin /* Mask out flags that are inappropriate for the given type of inode. */ 4292dc6b0d4SDuane Griffin static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags) 4302dc6b0d4SDuane Griffin { 4312dc6b0d4SDuane Griffin if (S_ISDIR(mode)) 4322dc6b0d4SDuane Griffin return flags; 4332dc6b0d4SDuane Griffin else if (S_ISREG(mode)) 4342dc6b0d4SDuane Griffin return flags & EXT4_REG_FLMASK; 4352dc6b0d4SDuane Griffin else 4362dc6b0d4SDuane Griffin return flags & EXT4_OTHER_FLMASK; 4372dc6b0d4SDuane Griffin } 4382dc6b0d4SDuane Griffin 43912e9b892SDmitry Monakhov /* 44012e9b892SDmitry Monakhov * Inode flags used for atomic set/get 44112e9b892SDmitry Monakhov */ 44212e9b892SDmitry Monakhov enum { 44312e9b892SDmitry Monakhov EXT4_INODE_SECRM = 0, /* Secure deletion */ 44412e9b892SDmitry Monakhov EXT4_INODE_UNRM = 1, /* Undelete */ 44512e9b892SDmitry Monakhov EXT4_INODE_COMPR = 2, /* Compress file */ 44612e9b892SDmitry Monakhov EXT4_INODE_SYNC = 3, /* Synchronous updates */ 44712e9b892SDmitry Monakhov EXT4_INODE_IMMUTABLE = 4, /* Immutable file */ 44812e9b892SDmitry Monakhov EXT4_INODE_APPEND = 5, /* writes to file may only append */ 44912e9b892SDmitry Monakhov EXT4_INODE_NODUMP = 6, /* do not dump file */ 45012e9b892SDmitry Monakhov EXT4_INODE_NOATIME = 7, /* do not update atime */ 45112e9b892SDmitry Monakhov /* Reserved for compression usage... */ 45212e9b892SDmitry Monakhov EXT4_INODE_DIRTY = 8, 45312e9b892SDmitry Monakhov EXT4_INODE_COMPRBLK = 9, /* One or more compressed clusters */ 45412e9b892SDmitry Monakhov EXT4_INODE_NOCOMPR = 10, /* Don't compress */ 455f542fbe8STheodore Ts'o EXT4_INODE_ENCRYPT = 11, /* Encrypted file */ 45612e9b892SDmitry Monakhov /* End compression flags --- maybe not all used */ 45712e9b892SDmitry Monakhov EXT4_INODE_INDEX = 12, /* hash-indexed directory */ 45812e9b892SDmitry Monakhov EXT4_INODE_IMAGIC = 13, /* AFS directory */ 45912e9b892SDmitry Monakhov EXT4_INODE_JOURNAL_DATA = 14, /* file data should be journaled */ 46012e9b892SDmitry Monakhov EXT4_INODE_NOTAIL = 15, /* file tail should not be merged */ 46112e9b892SDmitry Monakhov EXT4_INODE_DIRSYNC = 16, /* dirsync behaviour (directories only) */ 46212e9b892SDmitry Monakhov EXT4_INODE_TOPDIR = 17, /* Top of directory hierarchies*/ 46312e9b892SDmitry Monakhov EXT4_INODE_HUGE_FILE = 18, /* Set to each huge file */ 46412e9b892SDmitry Monakhov EXT4_INODE_EXTENTS = 19, /* Inode uses extents */ 46512e9b892SDmitry Monakhov EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */ 46612e9b892SDmitry Monakhov EXT4_INODE_EOFBLOCKS = 22, /* Blocks allocated beyond EOF */ 46767cf5b09STao Ma EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */ 4688b4953e1STheodore Ts'o EXT4_INODE_PROJINHERIT = 29, /* Create with parents projid */ 46912e9b892SDmitry Monakhov EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */ 47012e9b892SDmitry Monakhov }; 47112e9b892SDmitry Monakhov 47212e9b892SDmitry Monakhov /* 4739a4c8019SCarlos Maiolino * Since it's pretty easy to mix up bit numbers and hex values, we use a 4749a4c8019SCarlos Maiolino * build-time check to make sure that EXT4_XXX_FL is consistent with respect to 4759a4c8019SCarlos Maiolino * EXT4_INODE_XXX. If all is well, the macros will be dropped, so, it won't cost 4769a4c8019SCarlos Maiolino * any extra space in the compiled kernel image, otherwise, the build will fail. 4779a4c8019SCarlos Maiolino * It's important that these values are the same, since we are using 4789a4c8019SCarlos Maiolino * EXT4_INODE_XXX to test for flag values, but EXT4_XXX_FL must be consistent 4799a4c8019SCarlos Maiolino * with the values of FS_XXX_FL defined in include/linux/fs.h and the on-disk 4809a4c8019SCarlos Maiolino * values found in ext2, ext3 and ext4 filesystems, and of course the values 4819a4c8019SCarlos Maiolino * defined in e2fsprogs. 48212e9b892SDmitry Monakhov * 48312e9b892SDmitry Monakhov * It's not paranoia if the Murphy's Law really *is* out to get you. :-) 48412e9b892SDmitry Monakhov */ 4859a4c8019SCarlos Maiolino #define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG)) 4869a4c8019SCarlos Maiolino #define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG)) 4879a4c8019SCarlos Maiolino 48812e9b892SDmitry Monakhov static inline void ext4_check_flag_values(void) 48912e9b892SDmitry Monakhov { 49012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SECRM); 49112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(UNRM); 49212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPR); 49312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(SYNC); 49412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMMUTABLE); 49512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(APPEND); 49612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NODUMP); 49712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOATIME); 49812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRTY); 49912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(COMPRBLK); 50012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOCOMPR); 5013edc18d8STheodore Ts'o CHECK_FLAG_VALUE(ENCRYPT); 50212e9b892SDmitry Monakhov CHECK_FLAG_VALUE(INDEX); 50312e9b892SDmitry Monakhov CHECK_FLAG_VALUE(IMAGIC); 50412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(JOURNAL_DATA); 50512e9b892SDmitry Monakhov CHECK_FLAG_VALUE(NOTAIL); 50612e9b892SDmitry Monakhov CHECK_FLAG_VALUE(DIRSYNC); 50712e9b892SDmitry Monakhov CHECK_FLAG_VALUE(TOPDIR); 50812e9b892SDmitry Monakhov CHECK_FLAG_VALUE(HUGE_FILE); 50912e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EXTENTS); 51012e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EA_INODE); 51112e9b892SDmitry Monakhov CHECK_FLAG_VALUE(EOFBLOCKS); 51267cf5b09STao Ma CHECK_FLAG_VALUE(INLINE_DATA); 5138b4953e1STheodore Ts'o CHECK_FLAG_VALUE(PROJINHERIT); 51412e9b892SDmitry Monakhov CHECK_FLAG_VALUE(RESERVED); 51512e9b892SDmitry Monakhov } 51612e9b892SDmitry Monakhov 5173dcf5451SChristoph Hellwig /* Used to pass group descriptor data when online resize is done */ 5183dcf5451SChristoph Hellwig struct ext4_new_group_input { 5193dcf5451SChristoph Hellwig __u32 group; /* Group number for this data */ 5203dcf5451SChristoph Hellwig __u64 block_bitmap; /* Absolute block number of block bitmap */ 5213dcf5451SChristoph Hellwig __u64 inode_bitmap; /* Absolute block number of inode bitmap */ 5223dcf5451SChristoph Hellwig __u64 inode_table; /* Absolute block number of inode table start */ 5233dcf5451SChristoph Hellwig __u32 blocks_count; /* Total number of blocks in this group */ 5243dcf5451SChristoph Hellwig __u16 reserved_blocks; /* Number of reserved blocks in this group */ 5253dcf5451SChristoph Hellwig __u16 unused; 5263dcf5451SChristoph Hellwig }; 5273dcf5451SChristoph Hellwig 5284d92dc0fSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 5294d92dc0fSBen Hutchings struct compat_ext4_new_group_input { 5304d92dc0fSBen Hutchings u32 group; 5314d92dc0fSBen Hutchings compat_u64 block_bitmap; 5324d92dc0fSBen Hutchings compat_u64 inode_bitmap; 5334d92dc0fSBen Hutchings compat_u64 inode_table; 5344d92dc0fSBen Hutchings u32 blocks_count; 5354d92dc0fSBen Hutchings u16 reserved_blocks; 5364d92dc0fSBen Hutchings u16 unused; 5374d92dc0fSBen Hutchings }; 5384d92dc0fSBen Hutchings #endif 5394d92dc0fSBen Hutchings 5403dcf5451SChristoph Hellwig /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ 5413dcf5451SChristoph Hellwig struct ext4_new_group_data { 5423dcf5451SChristoph Hellwig __u32 group; 5433dcf5451SChristoph Hellwig __u64 block_bitmap; 5443dcf5451SChristoph Hellwig __u64 inode_bitmap; 5453dcf5451SChristoph Hellwig __u64 inode_table; 5463dcf5451SChristoph Hellwig __u32 blocks_count; 5473dcf5451SChristoph Hellwig __u16 reserved_blocks; 5483dcf5451SChristoph Hellwig __u16 unused; 5493dcf5451SChristoph Hellwig __u32 free_blocks_count; 5503dcf5451SChristoph Hellwig }; 5513dcf5451SChristoph Hellwig 55233afdcc5SYongqiang Yang /* Indexes used to index group tables in ext4_new_group_data */ 55333afdcc5SYongqiang Yang enum { 55433afdcc5SYongqiang Yang BLOCK_BITMAP = 0, /* block bitmap */ 55533afdcc5SYongqiang Yang INODE_BITMAP, /* inode bitmap */ 55633afdcc5SYongqiang Yang INODE_TABLE, /* inode tables */ 55733afdcc5SYongqiang Yang GROUP_TABLE_COUNT, 55833afdcc5SYongqiang Yang }; 55933afdcc5SYongqiang Yang 5603dcf5451SChristoph Hellwig /* 56179e83036SEric Sandeen * Flags used by ext4_map_blocks() 5623dcf5451SChristoph Hellwig */ 563556615dcSLukas Czerner /* Allocate any needed blocks and/or convert an unwritten 564c2177057STheodore Ts'o extent to be an initialized ext4 */ 5652ac3b6e0STheodore Ts'o #define EXT4_GET_BLOCKS_CREATE 0x0001 566556615dcSLukas Czerner /* Request the creation of an unwritten extent */ 567556615dcSLukas Czerner #define EXT4_GET_BLOCKS_UNWRIT_EXT 0x0002 568556615dcSLukas Czerner #define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT (EXT4_GET_BLOCKS_UNWRIT_EXT|\ 569c2177057STheodore Ts'o EXT4_GET_BLOCKS_CREATE) 57027dd4385SLukas Czerner /* Caller is from the delayed allocation writeout path 57127dd4385SLukas Czerner * finally doing the actual allocation of delayed blocks */ 57203f5d8bcSJan Kara #define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004 5730031462bSMingming Cao /* caller is from the direct IO path, request to creation of an 574556615dcSLukas Czerner unwritten extents if not allocated, split the unwritten 5750031462bSMingming Cao extent if blocks has been preallocated already*/ 576c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_PRE_IO 0x0008 5771296cc85SAneesh Kumar K.V #define EXT4_GET_BLOCKS_CONVERT 0x0010 578c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\ 579556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 580c7064ef1SJiaying Zhang /* Convert extent to initialized after IO complete */ 581c7064ef1SJiaying Zhang #define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\ 582556615dcSLukas Czerner EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) 58327dd4385SLukas Czerner /* Eventual metadata allocation (due to growing extent tree) 58427dd4385SLukas Czerner * should not fail, so try to use reserved blocks for that.*/ 58527dd4385SLukas Czerner #define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020 586556b27abSVivek Haldar /* Don't normalize allocation size (used for fallocate) */ 587556b27abSVivek Haldar #define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040 588a4e5d88bSDmitry Monakhov /* Request will not result in inode size update (user for fallocate) */ 589a4e5d88bSDmitry Monakhov #define EXT4_GET_BLOCKS_KEEP_SIZE 0x0080 590b8a86845SLukas Czerner /* Convert written extents to unwritten */ 5912dcba478SJan Kara #define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN 0x0100 592c86d8db3SJan Kara /* Write zeros to newly created written extents */ 593c86d8db3SJan Kara #define EXT4_GET_BLOCKS_ZERO 0x0200 594c86d8db3SJan Kara #define EXT4_GET_BLOCKS_CREATE_ZERO (EXT4_GET_BLOCKS_CREATE |\ 595c86d8db3SJan Kara EXT4_GET_BLOCKS_ZERO) 596ee0876bcSJan Kara /* Caller will submit data before dropping transaction handle. This 597ee0876bcSJan Kara * allows jbd2 to avoid submitting data before commit. */ 598ee0876bcSJan Kara #define EXT4_GET_BLOCKS_IO_SUBMIT 0x0400 5993dcf5451SChristoph Hellwig 6003dcf5451SChristoph Hellwig /* 6017869a4a6STheodore Ts'o * The bit position of these flags must not overlap with any of the 602ed8a1a76STheodore Ts'o * EXT4_GET_BLOCKS_*. They are used by ext4_find_extent(), 603107a7bd3STheodore Ts'o * read_extent_tree_block(), ext4_split_extent_at(), 6047869a4a6STheodore Ts'o * ext4_ext_insert_extent(), and ext4_ext_create_new_leaf(). 6057869a4a6STheodore Ts'o * EXT4_EX_NOCACHE is used to indicate that the we shouldn't be 6067869a4a6STheodore Ts'o * caching the extents when reading from the extent tree while a 6077869a4a6STheodore Ts'o * truncate or punch hole operation is in progress. 608107a7bd3STheodore Ts'o */ 609d26e2c4dSTheodore Ts'o #define EXT4_EX_NOCACHE 0x40000000 610d26e2c4dSTheodore Ts'o #define EXT4_EX_FORCE_CACHE 0x20000000 611107a7bd3STheodore Ts'o 612107a7bd3STheodore Ts'o /* 613e6362609STheodore Ts'o * Flags used by ext4_free_blocks 614e6362609STheodore Ts'o */ 615e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_METADATA 0x0001 616e6362609STheodore Ts'o #define EXT4_FREE_BLOCKS_FORGET 0x0002 6171f2acb60STheodore Ts'o #define EXT4_FREE_BLOCKS_VALIDATED 0x0004 6187132de74SMaxim Patlasov #define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008 61984130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010 62084130193STheodore Ts'o #define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020 621e6362609STheodore Ts'o 622e6362609STheodore Ts'o /* 6233dcf5451SChristoph Hellwig * ioctl commands 6243dcf5451SChristoph Hellwig */ 6253dcf5451SChristoph Hellwig #define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS 6263dcf5451SChristoph Hellwig #define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS 6273dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION _IOR('f', 3, long) 6283dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION _IOW('f', 4, long) 6293dcf5451SChristoph Hellwig #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION 6303dcf5451SChristoph Hellwig #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION 6313dcf5451SChristoph Hellwig #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) 6323dcf5451SChristoph Hellwig #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) 6338eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) 6348eea80d5STheodore Ts'o #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) 6358eea80d5STheodore Ts'o #define EXT4_IOC_MIGRATE _IO('f', 9) 636ccd2506bSTheodore Ts'o /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */ 6378eea80d5STheodore Ts'o /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ 638ccd2506bSTheodore Ts'o #define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12) 639748de673SAkira Fujita #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent) 64019c5246dSYongqiang Yang #define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) 641393d1d1dSDr. Tilmann Bubeck #define EXT4_IOC_SWAP_BOOT _IO('f', 17) 6427869a4a6STheodore Ts'o #define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18) 643a7550b30SJaegeuk Kim #define EXT4_IOC_SET_ENCRYPTION_POLICY FS_IOC_SET_ENCRYPTION_POLICY 644a7550b30SJaegeuk Kim #define EXT4_IOC_GET_ENCRYPTION_PWSALT FS_IOC_GET_ENCRYPTION_PWSALT 645a7550b30SJaegeuk Kim #define EXT4_IOC_GET_ENCRYPTION_POLICY FS_IOC_GET_ENCRYPTION_POLICY 6463dcf5451SChristoph Hellwig 6479b7365fcSLi Xi #ifndef FS_IOC_FSGETXATTR 6489b7365fcSLi Xi /* Until the uapi changes get merged for project quota... */ 6499b7365fcSLi Xi 6509b7365fcSLi Xi #define FS_IOC_FSGETXATTR _IOR('X', 31, struct fsxattr) 6519b7365fcSLi Xi #define FS_IOC_FSSETXATTR _IOW('X', 32, struct fsxattr) 6529b7365fcSLi Xi 6539b7365fcSLi Xi /* 6549b7365fcSLi Xi * Structure for FS_IOC_FSGETXATTR and FS_IOC_FSSETXATTR. 6559b7365fcSLi Xi */ 6569b7365fcSLi Xi struct fsxattr { 6579b7365fcSLi Xi __u32 fsx_xflags; /* xflags field value (get/set) */ 6589b7365fcSLi Xi __u32 fsx_extsize; /* extsize field value (get/set)*/ 6599b7365fcSLi Xi __u32 fsx_nextents; /* nextents field value (get) */ 6609b7365fcSLi Xi __u32 fsx_projid; /* project identifier (get/set) */ 6619b7365fcSLi Xi unsigned char fsx_pad[12]; 6629b7365fcSLi Xi }; 6639b7365fcSLi Xi 6649b7365fcSLi Xi /* 6659b7365fcSLi Xi * Flags for the fsx_xflags field 6669b7365fcSLi Xi */ 6679b7365fcSLi Xi #define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */ 6689b7365fcSLi Xi #define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */ 6699b7365fcSLi Xi #define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */ 6709b7365fcSLi Xi #define FS_XFLAG_APPEND 0x00000010 /* all writes append */ 6719b7365fcSLi Xi #define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */ 6729b7365fcSLi Xi #define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */ 6739b7365fcSLi Xi #define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */ 6749b7365fcSLi Xi #define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */ 6759b7365fcSLi Xi #define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */ 6769b7365fcSLi Xi #define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */ 6779b7365fcSLi Xi #define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */ 6789b7365fcSLi Xi #define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */ 6799b7365fcSLi Xi #define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */ 6809b7365fcSLi Xi #define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ 6819b7365fcSLi Xi #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ 6829b7365fcSLi Xi #endif /* !defined(FS_IOC_FSGETXATTR) */ 6839b7365fcSLi Xi 6849b7365fcSLi Xi #define EXT4_IOC_FSGETXATTR FS_IOC_FSGETXATTR 6859b7365fcSLi Xi #define EXT4_IOC_FSSETXATTR FS_IOC_FSSETXATTR 6869b7365fcSLi Xi 687e9be2ac7STheodore Ts'o #define EXT4_IOC_SHUTDOWN _IOR ('X', 125, __u32) 688783d9485STheodore Ts'o 689783d9485STheodore Ts'o /* 690783d9485STheodore Ts'o * Flags for going down operation 691783d9485STheodore Ts'o */ 692783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_DEFAULT 0x0 /* going down */ 693783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */ 694783d9485STheodore Ts'o #define EXT4_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */ 695783d9485STheodore Ts'o 696783d9485STheodore Ts'o 697899ad0ceSBen Hutchings #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 6983dcf5451SChristoph Hellwig /* 6993dcf5451SChristoph Hellwig * ioctl commands in 32 bit emulation 7003dcf5451SChristoph Hellwig */ 7013dcf5451SChristoph Hellwig #define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS 7023dcf5451SChristoph Hellwig #define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS 7033dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) 7043dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) 7053dcf5451SChristoph Hellwig #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) 7063dcf5451SChristoph Hellwig #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) 7073dcf5451SChristoph Hellwig #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) 7084d92dc0fSBen Hutchings #define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input) 7093dcf5451SChristoph Hellwig #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION 7103dcf5451SChristoph Hellwig #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION 711899ad0ceSBen Hutchings #endif 7123dcf5451SChristoph Hellwig 713b595076aSUwe Kleine-König /* Max physical block we can address w/o extents */ 714fb0a387dSEric Sandeen #define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF 715fb0a387dSEric Sandeen 7163dcf5451SChristoph Hellwig /* 7173dcf5451SChristoph Hellwig * Structure of an inode on the disk 7183dcf5451SChristoph Hellwig */ 7193dcf5451SChristoph Hellwig struct ext4_inode { 7203dcf5451SChristoph Hellwig __le16 i_mode; /* File mode */ 7213dcf5451SChristoph Hellwig __le16 i_uid; /* Low 16 bits of Owner Uid */ 7223dcf5451SChristoph Hellwig __le32 i_size_lo; /* Size in bytes */ 7233dcf5451SChristoph Hellwig __le32 i_atime; /* Access time */ 7243dcf5451SChristoph Hellwig __le32 i_ctime; /* Inode Change time */ 7253dcf5451SChristoph Hellwig __le32 i_mtime; /* Modification time */ 7263dcf5451SChristoph Hellwig __le32 i_dtime; /* Deletion Time */ 7273dcf5451SChristoph Hellwig __le16 i_gid; /* Low 16 bits of Group Id */ 7283dcf5451SChristoph Hellwig __le16 i_links_count; /* Links count */ 7293dcf5451SChristoph Hellwig __le32 i_blocks_lo; /* Blocks count */ 7303dcf5451SChristoph Hellwig __le32 i_flags; /* File flags */ 7313dcf5451SChristoph Hellwig union { 7323dcf5451SChristoph Hellwig struct { 7333dcf5451SChristoph Hellwig __le32 l_i_version; 7343dcf5451SChristoph Hellwig } linux1; 7353dcf5451SChristoph Hellwig struct { 7363dcf5451SChristoph Hellwig __u32 h_i_translator; 7373dcf5451SChristoph Hellwig } hurd1; 7383dcf5451SChristoph Hellwig struct { 7393dcf5451SChristoph Hellwig __u32 m_i_reserved1; 7403dcf5451SChristoph Hellwig } masix1; 7413dcf5451SChristoph Hellwig } osd1; /* OS dependent 1 */ 7423dcf5451SChristoph Hellwig __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ 7433dcf5451SChristoph Hellwig __le32 i_generation; /* File version (for NFS) */ 7443dcf5451SChristoph Hellwig __le32 i_file_acl_lo; /* File ACL */ 7453dcf5451SChristoph Hellwig __le32 i_size_high; 7463dcf5451SChristoph Hellwig __le32 i_obso_faddr; /* Obsoleted fragment address */ 7473dcf5451SChristoph Hellwig union { 7483dcf5451SChristoph Hellwig struct { 7493dcf5451SChristoph Hellwig __le16 l_i_blocks_high; /* were l_i_reserved1 */ 7503dcf5451SChristoph Hellwig __le16 l_i_file_acl_high; 7513dcf5451SChristoph Hellwig __le16 l_i_uid_high; /* these 2 fields */ 7523dcf5451SChristoph Hellwig __le16 l_i_gid_high; /* were reserved2[0] */ 753e6153918SDarrick J. Wong __le16 l_i_checksum_lo;/* crc32c(uuid+inum+inode) LE */ 754e6153918SDarrick J. Wong __le16 l_i_reserved; 7553dcf5451SChristoph Hellwig } linux2; 7563dcf5451SChristoph Hellwig struct { 7573dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 7583dcf5451SChristoph Hellwig __u16 h_i_mode_high; 7593dcf5451SChristoph Hellwig __u16 h_i_uid_high; 7603dcf5451SChristoph Hellwig __u16 h_i_gid_high; 7613dcf5451SChristoph Hellwig __u32 h_i_author; 7623dcf5451SChristoph Hellwig } hurd2; 7633dcf5451SChristoph Hellwig struct { 7643dcf5451SChristoph Hellwig __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ 7653dcf5451SChristoph Hellwig __le16 m_i_file_acl_high; 7663dcf5451SChristoph Hellwig __u32 m_i_reserved2[2]; 7673dcf5451SChristoph Hellwig } masix2; 7683dcf5451SChristoph Hellwig } osd2; /* OS dependent 2 */ 7693dcf5451SChristoph Hellwig __le16 i_extra_isize; 770e6153918SDarrick J. Wong __le16 i_checksum_hi; /* crc32c(uuid+inum+inode) BE */ 7713dcf5451SChristoph Hellwig __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ 7723dcf5451SChristoph Hellwig __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ 7733dcf5451SChristoph Hellwig __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ 7743dcf5451SChristoph Hellwig __le32 i_crtime; /* File Creation time */ 7753dcf5451SChristoph Hellwig __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ 7763dcf5451SChristoph Hellwig __le32 i_version_hi; /* high 32 bits for 64-bit version */ 7778b4953e1STheodore Ts'o __le32 i_projid; /* Project ID */ 7783dcf5451SChristoph Hellwig }; 7793dcf5451SChristoph Hellwig 780748de673SAkira Fujita struct move_extent { 781748de673SAkira Fujita __u32 reserved; /* should be zero */ 782748de673SAkira Fujita __u32 donor_fd; /* donor file descriptor */ 783748de673SAkira Fujita __u64 orig_start; /* logical start offset in block for orig */ 784748de673SAkira Fujita __u64 donor_start; /* logical start offset in block for donor */ 785748de673SAkira Fujita __u64 len; /* block length to be moved */ 786748de673SAkira Fujita __u64 moved_len; /* moved block length */ 787748de673SAkira Fujita }; 7883dcf5451SChristoph Hellwig 7893dcf5451SChristoph Hellwig #define EXT4_EPOCH_BITS 2 7903dcf5451SChristoph Hellwig #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) 7913dcf5451SChristoph Hellwig #define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) 7923dcf5451SChristoph Hellwig 7933dcf5451SChristoph Hellwig /* 7943dcf5451SChristoph Hellwig * Extended fields will fit into an inode if the filesystem was formatted 7953dcf5451SChristoph Hellwig * with large inodes (-I 256 or larger) and there are not currently any EAs 7963dcf5451SChristoph Hellwig * consuming all of the available space. For new inodes we always reserve 7973dcf5451SChristoph Hellwig * enough space for the kernel's known extended fields, but for inodes 7983dcf5451SChristoph Hellwig * created with an old kernel this might not have been the case. None of 7993dcf5451SChristoph Hellwig * the extended inode fields is critical for correct filesystem operation. 8003dcf5451SChristoph Hellwig * This macro checks if a certain field fits in the inode. Note that 8013dcf5451SChristoph Hellwig * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize 8023dcf5451SChristoph Hellwig */ 8033dcf5451SChristoph Hellwig #define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \ 8043dcf5451SChristoph Hellwig ((offsetof(typeof(*ext4_inode), field) + \ 8053dcf5451SChristoph Hellwig sizeof((ext4_inode)->field)) \ 8063dcf5451SChristoph Hellwig <= (EXT4_GOOD_OLD_INODE_SIZE + \ 8073dcf5451SChristoph Hellwig (einode)->i_extra_isize)) \ 8083dcf5451SChristoph Hellwig 809a4dad1aeSDavid Turner /* 810a4dad1aeSDavid Turner * We use an encoding that preserves the times for extra epoch "00": 811a4dad1aeSDavid Turner * 812a4dad1aeSDavid Turner * extra msb of adjust for signed 813a4dad1aeSDavid Turner * epoch 32-bit 32-bit tv_sec to 814a4dad1aeSDavid Turner * bits time decoded 64-bit tv_sec 64-bit tv_sec valid time range 815a4dad1aeSDavid Turner * 0 0 1 -0x80000000..-0x00000001 0x000000000 1901-12-13..1969-12-31 816a4dad1aeSDavid Turner * 0 0 0 0x000000000..0x07fffffff 0x000000000 1970-01-01..2038-01-19 817a4dad1aeSDavid Turner * 0 1 1 0x080000000..0x0ffffffff 0x100000000 2038-01-19..2106-02-07 818a4dad1aeSDavid Turner * 0 1 0 0x100000000..0x17fffffff 0x100000000 2106-02-07..2174-02-25 819a4dad1aeSDavid Turner * 1 0 1 0x180000000..0x1ffffffff 0x200000000 2174-02-25..2242-03-16 820a4dad1aeSDavid Turner * 1 0 0 0x200000000..0x27fffffff 0x200000000 2242-03-16..2310-04-04 821a4dad1aeSDavid Turner * 1 1 1 0x280000000..0x2ffffffff 0x300000000 2310-04-04..2378-04-22 822a4dad1aeSDavid Turner * 1 1 0 0x300000000..0x37fffffff 0x300000000 2378-04-22..2446-05-10 823a4dad1aeSDavid Turner * 824a4dad1aeSDavid Turner * Note that previous versions of the kernel on 64-bit systems would 825a4dad1aeSDavid Turner * incorrectly use extra epoch bits 1,1 for dates between 1901 and 826a4dad1aeSDavid Turner * 1970. e2fsck will correct this, assuming that it is run on the 827a4dad1aeSDavid Turner * affected filesystem before 2242. 828a4dad1aeSDavid Turner */ 829a4dad1aeSDavid Turner 8303dcf5451SChristoph Hellwig static inline __le32 ext4_encode_extra_time(struct timespec *time) 8313dcf5451SChristoph Hellwig { 832a4dad1aeSDavid Turner u32 extra = sizeof(time->tv_sec) > 4 ? 833a4dad1aeSDavid Turner ((time->tv_sec - (s32)time->tv_sec) >> 32) & EXT4_EPOCH_MASK : 0; 834a4dad1aeSDavid Turner return cpu_to_le32(extra | (time->tv_nsec << EXT4_EPOCH_BITS)); 8353dcf5451SChristoph Hellwig } 8363dcf5451SChristoph Hellwig 8373dcf5451SChristoph Hellwig static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra) 8383dcf5451SChristoph Hellwig { 839a4dad1aeSDavid Turner if (unlikely(sizeof(time->tv_sec) > 4 && 840a4dad1aeSDavid Turner (extra & cpu_to_le32(EXT4_EPOCH_MASK)))) { 841eaa093d2SChristoph Hellwig 842eaa093d2SChristoph Hellwig #if 1 843a4dad1aeSDavid Turner /* Handle legacy encoding of pre-1970 dates with epoch 844eaa093d2SChristoph Hellwig * bits 1,1. (This backwards compatibility may be removed 845eaa093d2SChristoph Hellwig * at the discretion of the ext4 developers.) 846a4dad1aeSDavid Turner */ 847a4dad1aeSDavid Turner u64 extra_bits = le32_to_cpu(extra) & EXT4_EPOCH_MASK; 848a4dad1aeSDavid Turner if (extra_bits == 3 && ((time->tv_sec) & 0x80000000) != 0) 849a4dad1aeSDavid Turner extra_bits = 0; 850a4dad1aeSDavid Turner time->tv_sec += extra_bits << 32; 851a4dad1aeSDavid Turner #else 852a4dad1aeSDavid Turner time->tv_sec += (u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32; 853a4dad1aeSDavid Turner #endif 854a4dad1aeSDavid Turner } 855c1fccc06STheodore Ts'o time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; 8563dcf5451SChristoph Hellwig } 8573dcf5451SChristoph Hellwig 8583dcf5451SChristoph Hellwig #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ 8593dcf5451SChristoph Hellwig do { \ 8603dcf5451SChristoph Hellwig (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ 8613dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ 8623dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 8633dcf5451SChristoph Hellwig ext4_encode_extra_time(&(inode)->xtime); \ 8643dcf5451SChristoph Hellwig } while (0) 8653dcf5451SChristoph Hellwig 8663dcf5451SChristoph Hellwig #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ 8673dcf5451SChristoph Hellwig do { \ 8683dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 8693dcf5451SChristoph Hellwig (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \ 8703dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 8713dcf5451SChristoph Hellwig (raw_inode)->xtime ## _extra = \ 8723dcf5451SChristoph Hellwig ext4_encode_extra_time(&(einode)->xtime); \ 8733dcf5451SChristoph Hellwig } while (0) 8743dcf5451SChristoph Hellwig 8753dcf5451SChristoph Hellwig #define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \ 8763dcf5451SChristoph Hellwig do { \ 8773dcf5451SChristoph Hellwig (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \ 8783dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ 8793dcf5451SChristoph Hellwig ext4_decode_extra_time(&(inode)->xtime, \ 8803dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 881af0b44a1SEric Sandeen else \ 882af0b44a1SEric Sandeen (inode)->xtime.tv_nsec = 0; \ 8833dcf5451SChristoph Hellwig } while (0) 8843dcf5451SChristoph Hellwig 8853dcf5451SChristoph Hellwig #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ 8863dcf5451SChristoph Hellwig do { \ 8873dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ 8883dcf5451SChristoph Hellwig (einode)->xtime.tv_sec = \ 8893dcf5451SChristoph Hellwig (signed)le32_to_cpu((raw_inode)->xtime); \ 89019ea8060STheodore Ts'o else \ 89119ea8060STheodore Ts'o (einode)->xtime.tv_sec = 0; \ 8923dcf5451SChristoph Hellwig if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ 8933dcf5451SChristoph Hellwig ext4_decode_extra_time(&(einode)->xtime, \ 8943dcf5451SChristoph Hellwig raw_inode->xtime ## _extra); \ 895af0b44a1SEric Sandeen else \ 896af0b44a1SEric Sandeen (einode)->xtime.tv_nsec = 0; \ 8973dcf5451SChristoph Hellwig } while (0) 8983dcf5451SChristoph Hellwig 8993dcf5451SChristoph Hellwig #define i_disk_version osd1.linux1.l_i_version 9003dcf5451SChristoph Hellwig 9013dcf5451SChristoph Hellwig #if defined(__KERNEL__) || defined(__linux__) 9023dcf5451SChristoph Hellwig #define i_reserved1 osd1.linux1.l_i_reserved1 9033dcf5451SChristoph Hellwig #define i_file_acl_high osd2.linux2.l_i_file_acl_high 9043dcf5451SChristoph Hellwig #define i_blocks_high osd2.linux2.l_i_blocks_high 9053dcf5451SChristoph Hellwig #define i_uid_low i_uid 9063dcf5451SChristoph Hellwig #define i_gid_low i_gid 9073dcf5451SChristoph Hellwig #define i_uid_high osd2.linux2.l_i_uid_high 9083dcf5451SChristoph Hellwig #define i_gid_high osd2.linux2.l_i_gid_high 909e6153918SDarrick J. Wong #define i_checksum_lo osd2.linux2.l_i_checksum_lo 9103dcf5451SChristoph Hellwig 9113dcf5451SChristoph Hellwig #elif defined(__GNU__) 9123dcf5451SChristoph Hellwig 9133dcf5451SChristoph Hellwig #define i_translator osd1.hurd1.h_i_translator 9143dcf5451SChristoph Hellwig #define i_uid_high osd2.hurd2.h_i_uid_high 9153dcf5451SChristoph Hellwig #define i_gid_high osd2.hurd2.h_i_gid_high 9163dcf5451SChristoph Hellwig #define i_author osd2.hurd2.h_i_author 9173dcf5451SChristoph Hellwig 9183dcf5451SChristoph Hellwig #elif defined(__masix__) 9193dcf5451SChristoph Hellwig 9203dcf5451SChristoph Hellwig #define i_reserved1 osd1.masix1.m_i_reserved1 9213dcf5451SChristoph Hellwig #define i_file_acl_high osd2.masix2.m_i_file_acl_high 9223dcf5451SChristoph Hellwig #define i_reserved2 osd2.masix2.m_i_reserved2 9233dcf5451SChristoph Hellwig 9243dcf5451SChristoph Hellwig #endif /* defined(__KERNEL__) || defined(__linux__) */ 9253dcf5451SChristoph Hellwig 926c0677e6dSZheng Liu #include "extents_status.h" 927c0677e6dSZheng Liu 928d444c3c3STheodore Ts'o /* 929daf647d2STheodore Ts'o * Lock subclasses for i_data_sem in the ext4_inode_info structure. 930daf647d2STheodore Ts'o * 931daf647d2STheodore Ts'o * These are needed to avoid lockdep false positives when we need to 932daf647d2STheodore Ts'o * allocate blocks to the quota inode during ext4_map_blocks(), while 933daf647d2STheodore Ts'o * holding i_data_sem for a normal (non-quota) inode. Since we don't 934daf647d2STheodore Ts'o * do quota tracking for the quota inode, this avoids deadlock (as 935daf647d2STheodore Ts'o * well as infinite recursion, since it isn't turtles all the way 936daf647d2STheodore Ts'o * down...) 937daf647d2STheodore Ts'o * 938daf647d2STheodore Ts'o * I_DATA_SEM_NORMAL - Used for most inodes 939daf647d2STheodore Ts'o * I_DATA_SEM_OTHER - Used by move_inode.c for the second normal inode 940daf647d2STheodore Ts'o * where the second inode has larger inode number 941daf647d2STheodore Ts'o * than the first 942daf647d2STheodore Ts'o * I_DATA_SEM_QUOTA - Used for quota inodes only 943daf647d2STheodore Ts'o */ 944daf647d2STheodore Ts'o enum { 945daf647d2STheodore Ts'o I_DATA_SEM_NORMAL = 0, 946daf647d2STheodore Ts'o I_DATA_SEM_OTHER, 947daf647d2STheodore Ts'o I_DATA_SEM_QUOTA, 948daf647d2STheodore Ts'o }; 949daf647d2STheodore Ts'o 950daf647d2STheodore Ts'o 951daf647d2STheodore Ts'o /* 952d444c3c3STheodore Ts'o * fourth extended file system inode data in memory 953d444c3c3STheodore Ts'o */ 954d444c3c3STheodore Ts'o struct ext4_inode_info { 955d444c3c3STheodore Ts'o __le32 i_data[15]; /* unconverted */ 956d444c3c3STheodore Ts'o __u32 i_dtime; 95712e9b892SDmitry Monakhov ext4_fsblk_t i_file_acl; 958d444c3c3STheodore Ts'o 959d444c3c3STheodore Ts'o /* 960d444c3c3STheodore Ts'o * i_block_group is the number of the block group which contains 961d444c3c3STheodore Ts'o * this file's inode. Constant across the lifetime of the inode, 962a627b0a7SEric Whitney * it is used for making block allocation decisions - we try to 963d444c3c3STheodore Ts'o * place a file's data blocks near its inode block, and new inodes 964d444c3c3STheodore Ts'o * near to their parent directory's inode. 965d444c3c3STheodore Ts'o */ 966d444c3c3STheodore Ts'o ext4_group_t i_block_group; 9678a2005d3STheodore Ts'o ext4_lblk_t i_dir_start_lookup; 968353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 96919f5fb7aSTheodore Ts'o unsigned long i_state_flags; /* Dynamic state flags */ 970353eb83cSTheodore Ts'o #endif 97112e9b892SDmitry Monakhov unsigned long i_flags; 972d444c3c3STheodore Ts'o 973d444c3c3STheodore Ts'o /* 974d444c3c3STheodore Ts'o * Extended attributes can be read independently of the main file 975d444c3c3STheodore Ts'o * data. Taking i_mutex even when reading would cause contention 976d444c3c3STheodore Ts'o * between readers of EAs and writers of regular file data, so 977d444c3c3STheodore Ts'o * instead we synchronize on xattr_sem when reading or changing 978d444c3c3STheodore Ts'o * EAs. 979d444c3c3STheodore Ts'o */ 980d444c3c3STheodore Ts'o struct rw_semaphore xattr_sem; 981d444c3c3STheodore Ts'o 982d444c3c3STheodore Ts'o struct list_head i_orphan; /* unlinked but open inodes */ 983d444c3c3STheodore Ts'o 984d444c3c3STheodore Ts'o /* 985d444c3c3STheodore Ts'o * i_disksize keeps track of what the inode size is ON DISK, not 986d444c3c3STheodore Ts'o * in memory. During truncate, i_size is set to the new size by 987d444c3c3STheodore Ts'o * the VFS prior to calling ext4_truncate(), but the filesystem won't 988d444c3c3STheodore Ts'o * set i_disksize to 0 until the truncate is actually under way. 989d444c3c3STheodore Ts'o * 990d444c3c3STheodore Ts'o * The intent is that i_disksize always represents the blocks which 991d444c3c3STheodore Ts'o * are used by this file. This allows recovery to restart truncate 992d444c3c3STheodore Ts'o * on orphans if we crash during truncate. We actually write i_disksize 993d444c3c3STheodore Ts'o * into the on-disk inode when writing inodes out, instead of i_size. 994d444c3c3STheodore Ts'o * 995d444c3c3STheodore Ts'o * The only time when i_disksize and i_size may be different is when 996d444c3c3STheodore Ts'o * a truncate is in progress. The only things which change i_disksize 997d444c3c3STheodore Ts'o * are ext4_get_block (growth) and ext4_truncate (shrinkth). 998d444c3c3STheodore Ts'o */ 999d444c3c3STheodore Ts'o loff_t i_disksize; 1000d444c3c3STheodore Ts'o 1001d444c3c3STheodore Ts'o /* 1002d444c3c3STheodore Ts'o * i_data_sem is for serialising ext4_truncate() against 1003d444c3c3STheodore Ts'o * ext4_getblock(). In the 2.4 ext2 design, great chunks of inode's 1004d444c3c3STheodore Ts'o * data tree are chopped off during truncate. We can't do that in 1005d444c3c3STheodore Ts'o * ext4 because whenever we perform intermediate commits during 1006d444c3c3STheodore Ts'o * truncate, the inode and all the metadata blocks *must* be in a 1007d444c3c3STheodore Ts'o * consistent state which allows truncation of the orphans to restart 1008d444c3c3STheodore Ts'o * during recovery. Hence we must fix the get_block-vs-truncate race 1009d444c3c3STheodore Ts'o * by other means, so we have i_data_sem. 1010d444c3c3STheodore Ts'o */ 1011d444c3c3STheodore Ts'o struct rw_semaphore i_data_sem; 1012ea3d7209SJan Kara /* 1013ea3d7209SJan Kara * i_mmap_sem is for serializing page faults with truncate / punch hole 1014ea3d7209SJan Kara * operations. We have to make sure that new page cannot be faulted in 1015ea3d7209SJan Kara * a section of the inode that is being punched. We cannot easily use 1016ea3d7209SJan Kara * i_data_sem for this since we need protection for the whole punch 1017ea3d7209SJan Kara * operation and i_data_sem ranks below transaction start so we have 1018ea3d7209SJan Kara * to occasionally drop it. 1019ea3d7209SJan Kara */ 1020ea3d7209SJan Kara struct rw_semaphore i_mmap_sem; 1021d444c3c3STheodore Ts'o struct inode vfs_inode; 10228aefcd55STheodore Ts'o struct jbd2_inode *jinode; 1023d444c3c3STheodore Ts'o 1024202ee5dfSTheodore Ts'o spinlock_t i_raw_lock; /* protects updates to the raw inode */ 1025202ee5dfSTheodore Ts'o 1026d444c3c3STheodore Ts'o /* 1027d444c3c3STheodore Ts'o * File creation time. Its function is same as that of 1028d444c3c3STheodore Ts'o * struct timespec i_{a,c,m}time in the generic inode. 1029d444c3c3STheodore Ts'o */ 1030d444c3c3STheodore Ts'o struct timespec i_crtime; 1031d444c3c3STheodore Ts'o 1032d444c3c3STheodore Ts'o /* mballoc */ 1033d444c3c3STheodore Ts'o struct list_head i_prealloc_list; 1034d444c3c3STheodore Ts'o spinlock_t i_prealloc_lock; 1035d444c3c3STheodore Ts'o 1036c0677e6dSZheng Liu /* extents status tree */ 1037c0677e6dSZheng Liu struct ext4_es_tree i_es_tree; 1038c0677e6dSZheng Liu rwlock_t i_es_lock; 1039edaa53caSZheng Liu struct list_head i_es_list; 1040eb68d0e2SZheng Liu unsigned int i_es_all_nr; /* protected by i_es_lock */ 1041edaa53caSZheng Liu unsigned int i_es_shk_nr; /* protected by i_es_lock */ 1042dd475925SJan Kara ext4_lblk_t i_es_shrink_lblk; /* Offset where we start searching for 1043dd475925SJan Kara extents to shrink. Protected by 1044dd475925SJan Kara i_es_lock */ 1045c0677e6dSZheng Liu 1046d444c3c3STheodore Ts'o /* ialloc */ 1047d444c3c3STheodore Ts'o ext4_group_t i_last_alloc_group; 1048d444c3c3STheodore Ts'o 1049d444c3c3STheodore Ts'o /* allocation reservation info for delalloc */ 1050a627b0a7SEric Whitney /* In case of bigalloc, this refer to clusters rather than blocks */ 1051d444c3c3STheodore Ts'o unsigned int i_reserved_data_blocks; 105201f49d0bSTheodore Ts'o ext4_lblk_t i_da_metadata_calc_last_lblock; 10539d0be502STheodore Ts'o int i_da_metadata_calc_len; 1054d444c3c3STheodore Ts'o 1055d444c3c3STheodore Ts'o /* on-disk additional length */ 1056d444c3c3STheodore Ts'o __u16 i_extra_isize; 1057d444c3c3STheodore Ts'o 105867cf5b09STao Ma /* Indicate the inline data space. */ 105967cf5b09STao Ma u16 i_inline_off; 106067cf5b09STao Ma u16 i_inline_size; 106167cf5b09STao Ma 1062a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1063a9e7f447SDmitry Monakhov /* quota space reservation, managed internally by quota code */ 1064a9e7f447SDmitry Monakhov qsize_t i_reserved_quota; 1065a9e7f447SDmitry Monakhov #endif 10668d5d02e6SMingming Cao 10672e8fa54eSJan Kara /* Lock protecting lists below */ 1068744692dcSJiaying Zhang spinlock_t i_completed_io_lock; 10692e8fa54eSJan Kara /* 10702e8fa54eSJan Kara * Completed IOs that need unwritten extents handling and have 10712e8fa54eSJan Kara * transaction reserved 10722e8fa54eSJan Kara */ 10732e8fa54eSJan Kara struct list_head i_rsv_conversion_list; 10742e8fa54eSJan Kara struct work_struct i_rsv_conversion_work; 1075600be30aSJan Kara atomic_t i_unwritten; /* Nr. of inflight conversions pending */ 10768a2005d3STheodore Ts'o 10778a2005d3STheodore Ts'o spinlock_t i_block_reservation_lock; 1078b436b9beSJan Kara 1079b436b9beSJan Kara /* 1080b436b9beSJan Kara * Transactions that contain inode's metadata needed to complete 1081b436b9beSJan Kara * fsync and fdatasync, respectively. 1082b436b9beSJan Kara */ 1083b436b9beSJan Kara tid_t i_sync_tid; 1084b436b9beSJan Kara tid_t i_datasync_tid; 1085814525f4SDarrick J. Wong 108696c7e0d9SJan Kara #ifdef CONFIG_QUOTA 108796c7e0d9SJan Kara struct dquot *i_dquot[MAXQUOTAS]; 108896c7e0d9SJan Kara #endif 108996c7e0d9SJan Kara 1090814525f4SDarrick J. Wong /* Precomputed uuid+inum+igen checksum for seeding inode checksums */ 1091814525f4SDarrick J. Wong __u32 i_csum_seed; 1092b30ab0e0SMichael Halcrow 1093040cb378SLi Xi kprojid_t i_projid; 1094d444c3c3STheodore Ts'o }; 1095d444c3c3STheodore Ts'o 1096d444c3c3STheodore Ts'o /* 10973dcf5451SChristoph Hellwig * File system states 10983dcf5451SChristoph Hellwig */ 10993dcf5451SChristoph Hellwig #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ 11003dcf5451SChristoph Hellwig #define EXT4_ERROR_FS 0x0002 /* Errors detected */ 11013dcf5451SChristoph Hellwig #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ 11023dcf5451SChristoph Hellwig 11033dcf5451SChristoph Hellwig /* 11043dcf5451SChristoph Hellwig * Misc. filesystem flags 11053dcf5451SChristoph Hellwig */ 11063dcf5451SChristoph Hellwig #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ 11073dcf5451SChristoph Hellwig #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ 11083dcf5451SChristoph Hellwig #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ 11093dcf5451SChristoph Hellwig 11103dcf5451SChristoph Hellwig /* 111168911009SLukas Czerner * Mount flags set via mount options or defaults 11123dcf5451SChristoph Hellwig */ 1113cdb7ee4cSTahsin Erdogan #define EXT4_MOUNT_NO_MBCACHE 0x00001 /* Do not use mbcache */ 11143dcf5451SChristoph Hellwig #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ 11153dcf5451SChristoph Hellwig #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ 11163dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ 11173dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ 11183dcf5451SChristoph Hellwig #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ 111939ef17f1STheodore Ts'o #define EXT4_MOUNT_ERRORS_MASK 0x00070 11203dcf5451SChristoph Hellwig #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ 11213dcf5451SChristoph Hellwig #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ 1122923ae0ffSRoss Zwisler #ifdef CONFIG_FS_DAX 1123923ae0ffSRoss Zwisler #define EXT4_MOUNT_DAX 0x00200 /* Direct Access */ 1124923ae0ffSRoss Zwisler #else 1125923ae0ffSRoss Zwisler #define EXT4_MOUNT_DAX 0 1126923ae0ffSRoss Zwisler #endif 11273dcf5451SChristoph Hellwig #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ 11283dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ 11293dcf5451SChristoph Hellwig #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ 11303dcf5451SChristoph Hellwig #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ 11313dcf5451SChristoph Hellwig #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ 11323dcf5451SChristoph Hellwig #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ 11333dcf5451SChristoph Hellwig #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ 11343dcf5451SChristoph Hellwig #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ 1135afd4672dSTheodore Ts'o #define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000 /* No auto delalloc mapping */ 11363dcf5451SChristoph Hellwig #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ 113749da9392SJan Kara #define EXT4_MOUNT_QUOTA 0x40000 /* Some quota option set */ 113849da9392SJan Kara #define EXT4_MOUNT_USRQUOTA 0x80000 /* "old" user quota, 113949da9392SJan Kara * enable enforcement for hidden 114049da9392SJan Kara * quota files */ 114149da9392SJan Kara #define EXT4_MOUNT_GRPQUOTA 0x100000 /* "old" group quota, enable 114249da9392SJan Kara * enforcement for hidden quota 114349da9392SJan Kara * files */ 114449da9392SJan Kara #define EXT4_MOUNT_PRJQUOTA 0x200000 /* Enable project quota 114549da9392SJan Kara * enforcement */ 1146744692dcSJiaying Zhang #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */ 1147d4da6c9cSLinus Torvalds #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ 11483dcf5451SChristoph Hellwig #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ 114964769240SAlex Tomas #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ 11505bf5683aSHidehiro Kawai #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ 11516fd058f7STheodore Ts'o #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ 11525328e635SEric Sandeen #define EXT4_MOUNT_DISCARD 0x40000000 /* Issue DISCARD requests */ 1153bfff6873SLukas Czerner #define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000 /* Initialize uninitialized itables */ 11545bf5683aSHidehiro Kawai 115568911009SLukas Czerner /* 115668911009SLukas Czerner * Mount flags set either automatically (could not be set by mount option) 115768911009SLukas Czerner * based on per file system feature or property or in special cases such as 115868911009SLukas Czerner * distinguishing between explicit mount option definition and default. 115968911009SLukas Czerner */ 116056889787STheodore Ts'o #define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001 /* User explicitly 116156889787STheodore Ts'o specified delalloc */ 116268911009SLukas Czerner #define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002 /* We have standard group 116368911009SLukas Czerner size of blocksize * 8 116468911009SLukas Czerner blocks */ 1165ed3654ebSTheodore Ts'o #define EXT4_MOUNT2_HURD_COMPAT 0x00000004 /* Support HURD-castrated 1166ed3654ebSTheodore Ts'o file systems */ 116756889787STheodore Ts'o 11681e381f60SDmitry Monakhov #define EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM 0x00000008 /* User explicitly 11691e381f60SDmitry Monakhov specified journal checksum */ 11701e381f60SDmitry Monakhov 1171fd8c37ecSTheodore Ts'o #define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \ 1172fd8c37ecSTheodore Ts'o ~EXT4_MOUNT_##opt 1173fd8c37ecSTheodore Ts'o #define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \ 1174fd8c37ecSTheodore Ts'o EXT4_MOUNT_##opt 11753dcf5451SChristoph Hellwig #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ 11763dcf5451SChristoph Hellwig EXT4_MOUNT_##opt) 11773dcf5451SChristoph Hellwig 1178a2595b8aSTheodore Ts'o #define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \ 1179a2595b8aSTheodore Ts'o ~EXT4_MOUNT2_##opt 1180a2595b8aSTheodore Ts'o #define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \ 1181a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt 1182a2595b8aSTheodore Ts'o #define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \ 1183a2595b8aSTheodore Ts'o EXT4_MOUNT2_##opt) 1184a2595b8aSTheodore Ts'o 1185597d508cSAkinobu Mita #define ext4_test_and_set_bit __test_and_set_bit_le 1186597d508cSAkinobu Mita #define ext4_set_bit __set_bit_le 11873dcf5451SChristoph Hellwig #define ext4_set_bit_atomic ext2_set_bit_atomic 1188597d508cSAkinobu Mita #define ext4_test_and_clear_bit __test_and_clear_bit_le 1189597d508cSAkinobu Mita #define ext4_clear_bit __clear_bit_le 11903dcf5451SChristoph Hellwig #define ext4_clear_bit_atomic ext2_clear_bit_atomic 119150e0168cSAkinobu Mita #define ext4_test_bit test_bit_le 119250e0168cSAkinobu Mita #define ext4_find_next_zero_bit find_next_zero_bit_le 119350e0168cSAkinobu Mita #define ext4_find_next_bit find_next_bit_le 11943dcf5451SChristoph Hellwig 1195c3e94d1dSYongqiang Yang extern void ext4_set_bits(void *bm, int cur, int len); 1196c3e94d1dSYongqiang Yang 11973dcf5451SChristoph Hellwig /* 11983dcf5451SChristoph Hellwig * Maximal mount counts between two filesystem checks 11993dcf5451SChristoph Hellwig */ 12003dcf5451SChristoph Hellwig #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ 12013dcf5451SChristoph Hellwig #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ 12023dcf5451SChristoph Hellwig 12033dcf5451SChristoph Hellwig /* 12043dcf5451SChristoph Hellwig * Behaviour when detecting errors 12053dcf5451SChristoph Hellwig */ 12063dcf5451SChristoph Hellwig #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ 12073dcf5451SChristoph Hellwig #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ 12083dcf5451SChristoph Hellwig #define EXT4_ERRORS_PANIC 3 /* Panic */ 12093dcf5451SChristoph Hellwig #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE 12103dcf5451SChristoph Hellwig 1211e6153918SDarrick J. Wong /* Metadata checksum algorithm codes */ 1212e6153918SDarrick J. Wong #define EXT4_CRC32C_CHKSUM 1 1213e6153918SDarrick J. Wong 12143dcf5451SChristoph Hellwig /* 12153dcf5451SChristoph Hellwig * Structure of the super block 12163dcf5451SChristoph Hellwig */ 12173dcf5451SChristoph Hellwig struct ext4_super_block { 12183dcf5451SChristoph Hellwig /*00*/ __le32 s_inodes_count; /* Inodes count */ 12193dcf5451SChristoph Hellwig __le32 s_blocks_count_lo; /* Blocks count */ 12203dcf5451SChristoph Hellwig __le32 s_r_blocks_count_lo; /* Reserved blocks count */ 12213dcf5451SChristoph Hellwig __le32 s_free_blocks_count_lo; /* Free blocks count */ 12223dcf5451SChristoph Hellwig /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ 12233dcf5451SChristoph Hellwig __le32 s_first_data_block; /* First Data Block */ 12243dcf5451SChristoph Hellwig __le32 s_log_block_size; /* Block size */ 1225281b5995STheodore Ts'o __le32 s_log_cluster_size; /* Allocation cluster size */ 12263dcf5451SChristoph Hellwig /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ 1227281b5995STheodore Ts'o __le32 s_clusters_per_group; /* # Clusters per group */ 12283dcf5451SChristoph Hellwig __le32 s_inodes_per_group; /* # Inodes per group */ 12293dcf5451SChristoph Hellwig __le32 s_mtime; /* Mount time */ 12303dcf5451SChristoph Hellwig /*30*/ __le32 s_wtime; /* Write time */ 12313dcf5451SChristoph Hellwig __le16 s_mnt_count; /* Mount count */ 12323dcf5451SChristoph Hellwig __le16 s_max_mnt_count; /* Maximal mount count */ 12333dcf5451SChristoph Hellwig __le16 s_magic; /* Magic signature */ 12343dcf5451SChristoph Hellwig __le16 s_state; /* File system state */ 12353dcf5451SChristoph Hellwig __le16 s_errors; /* Behaviour when detecting errors */ 12363dcf5451SChristoph Hellwig __le16 s_minor_rev_level; /* minor revision level */ 12373dcf5451SChristoph Hellwig /*40*/ __le32 s_lastcheck; /* time of last check */ 12383dcf5451SChristoph Hellwig __le32 s_checkinterval; /* max. time between checks */ 12393dcf5451SChristoph Hellwig __le32 s_creator_os; /* OS */ 12403dcf5451SChristoph Hellwig __le32 s_rev_level; /* Revision level */ 12413dcf5451SChristoph Hellwig /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ 12423dcf5451SChristoph Hellwig __le16 s_def_resgid; /* Default gid for reserved blocks */ 12433dcf5451SChristoph Hellwig /* 12443dcf5451SChristoph Hellwig * These fields are for EXT4_DYNAMIC_REV superblocks only. 12453dcf5451SChristoph Hellwig * 12463dcf5451SChristoph Hellwig * Note: the difference between the compatible feature set and 12473dcf5451SChristoph Hellwig * the incompatible feature set is that if there is a bit set 12483dcf5451SChristoph Hellwig * in the incompatible feature set that the kernel doesn't 12493dcf5451SChristoph Hellwig * know about, it should refuse to mount the filesystem. 12503dcf5451SChristoph Hellwig * 12513dcf5451SChristoph Hellwig * e2fsck's requirements are more strict; if it doesn't know 12523dcf5451SChristoph Hellwig * about a feature in either the compatible or incompatible 12533dcf5451SChristoph Hellwig * feature set, it must abort and not try to meddle with 12543dcf5451SChristoph Hellwig * things it doesn't understand... 12553dcf5451SChristoph Hellwig */ 12563dcf5451SChristoph Hellwig __le32 s_first_ino; /* First non-reserved inode */ 12573dcf5451SChristoph Hellwig __le16 s_inode_size; /* size of inode structure */ 12583dcf5451SChristoph Hellwig __le16 s_block_group_nr; /* block group # of this superblock */ 12593dcf5451SChristoph Hellwig __le32 s_feature_compat; /* compatible feature set */ 12603dcf5451SChristoph Hellwig /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ 12613dcf5451SChristoph Hellwig __le32 s_feature_ro_compat; /* readonly-compatible feature set */ 12623dcf5451SChristoph Hellwig /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ 12633dcf5451SChristoph Hellwig /*78*/ char s_volume_name[16]; /* volume name */ 12643dcf5451SChristoph Hellwig /*88*/ char s_last_mounted[64]; /* directory where last mounted */ 12653dcf5451SChristoph Hellwig /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ 12663dcf5451SChristoph Hellwig /* 12673dcf5451SChristoph Hellwig * Performance hints. Directory preallocation should only 12683dcf5451SChristoph Hellwig * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. 12693dcf5451SChristoph Hellwig */ 12703dcf5451SChristoph Hellwig __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 12713dcf5451SChristoph Hellwig __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 12723dcf5451SChristoph Hellwig __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ 12733dcf5451SChristoph Hellwig /* 12743dcf5451SChristoph Hellwig * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. 12753dcf5451SChristoph Hellwig */ 12763dcf5451SChristoph Hellwig /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 12773dcf5451SChristoph Hellwig /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ 12783dcf5451SChristoph Hellwig __le32 s_journal_dev; /* device number of journal file */ 12793dcf5451SChristoph Hellwig __le32 s_last_orphan; /* start of list of inodes to delete */ 12803dcf5451SChristoph Hellwig __le32 s_hash_seed[4]; /* HTREE hash seed */ 12813dcf5451SChristoph Hellwig __u8 s_def_hash_version; /* Default hash version to use */ 128289eeddf0STheodore Ts'o __u8 s_jnl_backup_type; 12833dcf5451SChristoph Hellwig __le16 s_desc_size; /* size of group descriptor */ 12843dcf5451SChristoph Hellwig /*100*/ __le32 s_default_mount_opts; 12853dcf5451SChristoph Hellwig __le32 s_first_meta_bg; /* First metablock block group */ 12863dcf5451SChristoph Hellwig __le32 s_mkfs_time; /* When the filesystem was created */ 12873dcf5451SChristoph Hellwig __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ 12883dcf5451SChristoph Hellwig /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ 12893dcf5451SChristoph Hellwig /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ 12903dcf5451SChristoph Hellwig __le32 s_r_blocks_count_hi; /* Reserved blocks count */ 12913dcf5451SChristoph Hellwig __le32 s_free_blocks_count_hi; /* Free blocks count */ 12923dcf5451SChristoph Hellwig __le16 s_min_extra_isize; /* All inodes have at least # bytes */ 12933dcf5451SChristoph Hellwig __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ 12943dcf5451SChristoph Hellwig __le32 s_flags; /* Miscellaneous flags */ 12953dcf5451SChristoph Hellwig __le16 s_raid_stride; /* RAID stride */ 1296c5e06d10SJohann Lombardi __le16 s_mmp_update_interval; /* # seconds to wait in MMP checking */ 12973dcf5451SChristoph Hellwig __le64 s_mmp_block; /* Block for multi-mount protection */ 12983dcf5451SChristoph Hellwig __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ 1299772cb7c8SJose R. Santos __u8 s_log_groups_per_flex; /* FLEX_BG group size */ 1300e6153918SDarrick J. Wong __u8 s_checksum_type; /* metadata checksum algorithm used */ 1301f542fbe8STheodore Ts'o __u8 s_encryption_level; /* versioning level for encryption */ 1302f542fbe8STheodore Ts'o __u8 s_reserved_pad; /* Padding to next 32bits */ 1303afc32f7eSTheodore Ts'o __le64 s_kbytes_written; /* nr of lifetime kilobytes written */ 13044a9cdec7STheodore Ts'o __le32 s_snapshot_inum; /* Inode number of active snapshot */ 13054a9cdec7STheodore Ts'o __le32 s_snapshot_id; /* sequential ID of active snapshot */ 13064a9cdec7STheodore Ts'o __le64 s_snapshot_r_blocks_count; /* reserved blocks for active 13074a9cdec7STheodore Ts'o snapshot's future use */ 13084a9cdec7STheodore Ts'o __le32 s_snapshot_list; /* inode number of the head of the 13094a9cdec7STheodore Ts'o on-disk snapshot list */ 13101c13d5c0STheodore Ts'o #define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count) 13111c13d5c0STheodore Ts'o __le32 s_error_count; /* number of fs errors */ 13121c13d5c0STheodore Ts'o __le32 s_first_error_time; /* first time an error happened */ 13131c13d5c0STheodore Ts'o __le32 s_first_error_ino; /* inode involved in first error */ 13141c13d5c0STheodore Ts'o __le64 s_first_error_block; /* block involved of first error */ 13151c13d5c0STheodore Ts'o __u8 s_first_error_func[32]; /* function where the error happened */ 13161c13d5c0STheodore Ts'o __le32 s_first_error_line; /* line number where error happened */ 13171c13d5c0STheodore Ts'o __le32 s_last_error_time; /* most recent time of an error */ 13181c13d5c0STheodore Ts'o __le32 s_last_error_ino; /* inode involved in last error */ 13191c13d5c0STheodore Ts'o __le32 s_last_error_line; /* line number where error happened */ 13201c13d5c0STheodore Ts'o __le64 s_last_error_block; /* block involved of last error */ 13211c13d5c0STheodore Ts'o __u8 s_last_error_func[32]; /* function where the error happened */ 13228b67f04aSTheodore Ts'o #define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts) 13238b67f04aSTheodore Ts'o __u8 s_mount_opts[64]; 1324281b5995STheodore Ts'o __le32 s_usr_quota_inum; /* inode for tracking user quota */ 1325281b5995STheodore Ts'o __le32 s_grp_quota_inum; /* inode for tracking group quota */ 1326281b5995STheodore Ts'o __le32 s_overhead_clusters; /* overhead blocks/clusters in fs */ 13271beeef1bSDarrick J. Wong __le32 s_backup_bgs[2]; /* groups with sparse_super2 SBs */ 13283edc18d8STheodore Ts'o __u8 s_encrypt_algos[4]; /* Encryption algorithms in use */ 1329f542fbe8STheodore Ts'o __u8 s_encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ 1330f542fbe8STheodore Ts'o __le32 s_lpf_ino; /* Location of the lost+found inode */ 13318b4953e1STheodore Ts'o __le32 s_prj_quota_inum; /* inode for tracking project quota */ 13328c81bd8fSDarrick J. Wong __le32 s_checksum_seed; /* crc32c(uuid) if csum_seed set */ 13338c81bd8fSDarrick J. Wong __le32 s_reserved[98]; /* Padding to the end of the block */ 1334e6153918SDarrick J. Wong __le32 s_checksum; /* crc32c(superblock) */ 13353dcf5451SChristoph Hellwig }; 13363dcf5451SChristoph Hellwig 13371c13d5c0STheodore Ts'o #define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START) 13381c13d5c0STheodore Ts'o 13393dcf5451SChristoph Hellwig #ifdef __KERNEL__ 1340bc0b0d6dSTheodore Ts'o 1341bc0b0d6dSTheodore Ts'o /* 13424ab2f15bSTheodore Ts'o * run-time mount flags 1343bc0b0d6dSTheodore Ts'o */ 1344bc0b0d6dSTheodore Ts'o #define EXT4_MF_MNTDIR_SAMPLED 0x0001 13454ab2f15bSTheodore Ts'o #define EXT4_MF_FS_ABORTED 0x0002 /* Fatal error detected */ 13466ddb2447STheodore Ts'o #define EXT4_MF_TEST_DUMMY_ENCRYPTION 0x0004 13476ddb2447STheodore Ts'o 13486ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 13496ddb2447STheodore Ts'o #define DUMMY_ENCRYPTION_ENABLED(sbi) (unlikely((sbi)->s_mount_flags & \ 13506ddb2447STheodore Ts'o EXT4_MF_TEST_DUMMY_ENCRYPTION)) 13516ddb2447STheodore Ts'o #else 13526ddb2447STheodore Ts'o #define DUMMY_ENCRYPTION_ENABLED(sbi) (0) 13536ddb2447STheodore Ts'o #endif 1354bc0b0d6dSTheodore Ts'o 1355a2d4a646SJan Kara /* Number of quota types we support */ 1356689c958cSLi Xi #define EXT4_MAXQUOTAS 3 1357a2d4a646SJan Kara 1358ca0faba0STheodore Ts'o /* 1359ca0faba0STheodore Ts'o * fourth extended-fs super-block data in memory 1360ca0faba0STheodore Ts'o */ 1361ca0faba0STheodore Ts'o struct ext4_sb_info { 1362ca0faba0STheodore Ts'o unsigned long s_desc_size; /* Size of a group descriptor in bytes */ 1363ca0faba0STheodore Ts'o unsigned long s_inodes_per_block;/* Number of inodes per block */ 1364ca0faba0STheodore Ts'o unsigned long s_blocks_per_group;/* Number of blocks in a group */ 1365281b5995STheodore Ts'o unsigned long s_clusters_per_group; /* Number of clusters in a group */ 1366ca0faba0STheodore Ts'o unsigned long s_inodes_per_group;/* Number of inodes in a group */ 1367ca0faba0STheodore Ts'o unsigned long s_itb_per_group; /* Number of inode table blocks per group */ 1368ca0faba0STheodore Ts'o unsigned long s_gdb_count; /* Number of group descriptor blocks */ 1369ca0faba0STheodore Ts'o unsigned long s_desc_per_block; /* Number of group descriptors per block */ 1370ca0faba0STheodore Ts'o ext4_group_t s_groups_count; /* Number of groups in the fs */ 1371fb0a387dSEric Sandeen ext4_group_t s_blockfile_groups;/* Groups acceptable for non-extent files */ 1372952fc18eSTheodore Ts'o unsigned long s_overhead; /* # of fs overhead clusters */ 1373281b5995STheodore Ts'o unsigned int s_cluster_ratio; /* Number of blocks per cluster */ 1374281b5995STheodore Ts'o unsigned int s_cluster_bits; /* log2 of s_cluster_ratio */ 1375ca0faba0STheodore Ts'o loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ 1376ca0faba0STheodore Ts'o struct buffer_head * s_sbh; /* Buffer containing the super block */ 1377ca0faba0STheodore Ts'o struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ 1378ca0faba0STheodore Ts'o struct buffer_head **s_group_desc; 13797f4520ccSTheodore Ts'o unsigned int s_mount_opt; 1380a2595b8aSTheodore Ts'o unsigned int s_mount_opt2; 1381bc0b0d6dSTheodore Ts'o unsigned int s_mount_flags; 13825a916be1STheodore Ts'o unsigned int s_def_mount_opt; 1383ca0faba0STheodore Ts'o ext4_fsblk_t s_sb_block; 138427dd4385SLukas Czerner atomic64_t s_resv_clusters; 138508cefc7aSEric W. Biederman kuid_t s_resuid; 138608cefc7aSEric W. Biederman kgid_t s_resgid; 1387ca0faba0STheodore Ts'o unsigned short s_mount_state; 1388ca0faba0STheodore Ts'o unsigned short s_pad; 1389ca0faba0STheodore Ts'o int s_addr_per_block_bits; 1390ca0faba0STheodore Ts'o int s_desc_per_block_bits; 1391ca0faba0STheodore Ts'o int s_inode_size; 1392ca0faba0STheodore Ts'o int s_first_ino; 1393ca0faba0STheodore Ts'o unsigned int s_inode_readahead_blks; 139411013911SAndreas Dilger unsigned int s_inode_goal; 1395ca0faba0STheodore Ts'o spinlock_t s_next_gen_lock; 1396ca0faba0STheodore Ts'o u32 s_next_generation; 1397ca0faba0STheodore Ts'o u32 s_hash_seed[4]; 1398ca0faba0STheodore Ts'o int s_def_hash_version; 1399ca0faba0STheodore Ts'o int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */ 140057042651STheodore Ts'o struct percpu_counter s_freeclusters_counter; 1401ca0faba0STheodore Ts'o struct percpu_counter s_freeinodes_counter; 1402ca0faba0STheodore Ts'o struct percpu_counter s_dirs_counter; 140357042651STheodore Ts'o struct percpu_counter s_dirtyclusters_counter; 1404ca0faba0STheodore Ts'o struct blockgroup_lock *s_blockgroup_lock; 1405ca0faba0STheodore Ts'o struct proc_dir_entry *s_proc; 1406ca0faba0STheodore Ts'o struct kobject s_kobj; 1407ca0faba0STheodore Ts'o struct completion s_kobj_unregister; 14082c0544b2STheodore Ts'o struct super_block *s_sb; 1409ca0faba0STheodore Ts'o 1410ca0faba0STheodore Ts'o /* Journaling */ 1411ca0faba0STheodore Ts'o struct journal_s *s_journal; 1412ca0faba0STheodore Ts'o struct list_head s_orphan; 1413ca0faba0STheodore Ts'o struct mutex s_orphan_lock; 14149549a168STheodore Ts'o unsigned long s_ext4_flags; /* Ext4 superblock flags */ 1415ca0faba0STheodore Ts'o unsigned long s_commit_interval; 1416ca0faba0STheodore Ts'o u32 s_max_batch_time; 1417ca0faba0STheodore Ts'o u32 s_min_batch_time; 1418ca0faba0STheodore Ts'o struct block_device *journal_bdev; 1419ca0faba0STheodore Ts'o #ifdef CONFIG_QUOTA 1420a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; /* Names of quota files with journalled quota */ 1421ca0faba0STheodore Ts'o int s_jquota_fmt; /* Format of quota to use */ 1422ca0faba0STheodore Ts'o #endif 1423ca0faba0STheodore Ts'o unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ 14246fd058f7STheodore Ts'o struct rb_root system_blks; 1425ca0faba0STheodore Ts'o 1426ca0faba0STheodore Ts'o #ifdef EXTENTS_STATS 1427ca0faba0STheodore Ts'o /* ext4 extents stats */ 1428ca0faba0STheodore Ts'o unsigned long s_ext_min; 1429ca0faba0STheodore Ts'o unsigned long s_ext_max; 1430ca0faba0STheodore Ts'o unsigned long s_depth_max; 1431ca0faba0STheodore Ts'o spinlock_t s_ext_stats_lock; 1432ca0faba0STheodore Ts'o unsigned long s_ext_blocks; 1433ca0faba0STheodore Ts'o unsigned long s_ext_extents; 1434ca0faba0STheodore Ts'o #endif 1435ca0faba0STheodore Ts'o 1436ca0faba0STheodore Ts'o /* for buddy allocator */ 1437ca0faba0STheodore Ts'o struct ext4_group_info ***s_group_info; 1438ca0faba0STheodore Ts'o struct inode *s_buddy_cache; 1439ca0faba0STheodore Ts'o spinlock_t s_md_lock; 1440ca0faba0STheodore Ts'o unsigned short *s_mb_offsets; 1441ca0faba0STheodore Ts'o unsigned int *s_mb_maxs; 144228623c2fSTheodore Ts'o unsigned int s_group_info_size; 1443d08854f5STheodore Ts'o unsigned int s_mb_free_pending; 1444a0154344SDaeho Jeong struct list_head s_freed_data_list; /* List of blocks to be freed 1445a0154344SDaeho Jeong after commit completed */ 1446ca0faba0STheodore Ts'o 1447ca0faba0STheodore Ts'o /* tunables */ 1448ca0faba0STheodore Ts'o unsigned long s_stripe; 1449ca0faba0STheodore Ts'o unsigned int s_mb_stream_request; 1450ca0faba0STheodore Ts'o unsigned int s_mb_max_to_scan; 1451ca0faba0STheodore Ts'o unsigned int s_mb_min_to_scan; 1452ca0faba0STheodore Ts'o unsigned int s_mb_stats; 1453ca0faba0STheodore Ts'o unsigned int s_mb_order2_reqs; 1454ca0faba0STheodore Ts'o unsigned int s_mb_group_prealloc; 1455df981d03STheodore Ts'o unsigned int s_max_dir_size_kb; 1456ca0faba0STheodore Ts'o /* where last allocation was done - for stream allocation */ 1457ca0faba0STheodore Ts'o unsigned long s_mb_last_group; 1458ca0faba0STheodore Ts'o unsigned long s_mb_last_start; 1459ca0faba0STheodore Ts'o 1460ca0faba0STheodore Ts'o /* stats for buddy allocator */ 1461ca0faba0STheodore Ts'o atomic_t s_bal_reqs; /* number of reqs with len > 1 */ 1462ca0faba0STheodore Ts'o atomic_t s_bal_success; /* we found long enough chunks */ 1463ca0faba0STheodore Ts'o atomic_t s_bal_allocated; /* in blocks */ 1464ca0faba0STheodore Ts'o atomic_t s_bal_ex_scanned; /* total extents scanned */ 1465ca0faba0STheodore Ts'o atomic_t s_bal_goals; /* goal hits */ 1466ca0faba0STheodore Ts'o atomic_t s_bal_breaks; /* too long searches */ 1467ca0faba0STheodore Ts'o atomic_t s_bal_2orders; /* 2^order hits */ 1468ca0faba0STheodore Ts'o spinlock_t s_bal_lock; 1469ca0faba0STheodore Ts'o unsigned long s_mb_buddies_generated; 1470ca0faba0STheodore Ts'o unsigned long long s_mb_generation_time; 1471ca0faba0STheodore Ts'o atomic_t s_mb_lost_chunks; 1472ca0faba0STheodore Ts'o atomic_t s_mb_preallocated; 1473ca0faba0STheodore Ts'o atomic_t s_mb_discarded; 147450797481STheodore Ts'o atomic_t s_lock_busy; 1475ca0faba0STheodore Ts'o 1476ca0faba0STheodore Ts'o /* locality groups */ 1477003cb608STejun Heo struct ext4_locality_group __percpu *s_locality_groups; 1478ca0faba0STheodore Ts'o 1479ca0faba0STheodore Ts'o /* for write statistics */ 1480ca0faba0STheodore Ts'o unsigned long s_sectors_written_start; 1481ca0faba0STheodore Ts'o u64 s_kbytes_written; 1482ca0faba0STheodore Ts'o 148367a5da56SZheng Liu /* the size of zero-out chunk */ 148467a5da56SZheng Liu unsigned int s_extent_max_zeroout_kb; 148567a5da56SZheng Liu 1486ca0faba0STheodore Ts'o unsigned int s_log_groups_per_flex; 1487ca0faba0STheodore Ts'o struct flex_groups *s_flex_groups; 1488117fff10STheodore Ts'o ext4_group_t s_flex_groups_allocated; 14894c0425ffSMingming Cao 14902e8fa54eSJan Kara /* workqueue for reserved extent conversions (buffered io) */ 14912e8fa54eSJan Kara struct workqueue_struct *rsv_conversion_wq; 149266e61a9eSTheodore Ts'o 149366e61a9eSTheodore Ts'o /* timer for periodic error stats printing */ 149466e61a9eSTheodore Ts'o struct timer_list s_err_report; 1495bfff6873SLukas Czerner 1496bfff6873SLukas Czerner /* Lazy inode table initialization info */ 1497bfff6873SLukas Czerner struct ext4_li_request *s_li_request; 1498bfff6873SLukas Czerner /* Wait multiplier for lazy initialization thread */ 1499bfff6873SLukas Czerner unsigned int s_li_wait_mult; 1500c5e06d10SJohann Lombardi 1501c5e06d10SJohann Lombardi /* Kernel thread for multiple mount protection */ 1502c5e06d10SJohann Lombardi struct task_struct *s_mmp_tsk; 15033d56b8d2STao Ma 15043d56b8d2STao Ma /* record the last minlen when FITRIM is called. */ 15053d56b8d2STao Ma atomic_t s_last_trim_minblks; 15060441984aSDarrick J. Wong 15070441984aSDarrick J. Wong /* Reference to checksum algorithm driver via cryptoapi */ 15080441984aSDarrick J. Wong struct crypto_shash *s_chksum_driver; 1509a9c47317SDarrick J. Wong 1510a9c47317SDarrick J. Wong /* Precomputed FS UUID checksum for seeding other checksums */ 1511a9c47317SDarrick J. Wong __u32 s_csum_seed; 151274cd15cdSZheng Liu 151374cd15cdSZheng Liu /* Reclaim extents from extent status tree */ 151474cd15cdSZheng Liu struct shrinker s_es_shrinker; 1515dd475925SJan Kara struct list_head s_es_list; /* List of inodes with reclaimable extents */ 1516edaa53caSZheng Liu long s_es_nr_inode; 1517eb68d0e2SZheng Liu struct ext4_es_stats s_es_stats; 151847387409STahsin Erdogan struct mb_cache *s_ea_block_cache; 1519dec214d0STahsin Erdogan struct mb_cache *s_ea_inode_cache; 1520edaa53caSZheng Liu spinlock_t s_es_lock ____cacheline_aligned_in_smp; 1521efbed4dcSTheodore Ts'o 1522efbed4dcSTheodore Ts'o /* Ratelimit ext4 messages. */ 1523efbed4dcSTheodore Ts'o struct ratelimit_state s_err_ratelimit_state; 1524efbed4dcSTheodore Ts'o struct ratelimit_state s_warning_ratelimit_state; 1525efbed4dcSTheodore Ts'o struct ratelimit_state s_msg_ratelimit_state; 1526c8585c6fSDaeho Jeong 1527c8585c6fSDaeho Jeong /* Barrier between changing inodes' journal flags and writepages ops. */ 1528c8585c6fSDaeho Jeong struct percpu_rw_semaphore s_journal_flag_rwsem; 1529ca0faba0STheodore Ts'o }; 1530ca0faba0STheodore Ts'o 15313dcf5451SChristoph Hellwig static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) 15323dcf5451SChristoph Hellwig { 15333dcf5451SChristoph Hellwig return sb->s_fs_info; 15343dcf5451SChristoph Hellwig } 15353dcf5451SChristoph Hellwig static inline struct ext4_inode_info *EXT4_I(struct inode *inode) 15363dcf5451SChristoph Hellwig { 15373dcf5451SChristoph Hellwig return container_of(inode, struct ext4_inode_info, vfs_inode); 15383dcf5451SChristoph Hellwig } 15393dcf5451SChristoph Hellwig 15403dcf5451SChristoph Hellwig static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) 15413dcf5451SChristoph Hellwig { 15423dcf5451SChristoph Hellwig return ino == EXT4_ROOT_INO || 15437c319d32SAditya Kali ino == EXT4_USR_QUOTA_INO || 15447c319d32SAditya Kali ino == EXT4_GRP_QUOTA_INO || 1545393d1d1dSDr. Tilmann Bubeck ino == EXT4_BOOT_LOADER_INO || 15463dcf5451SChristoph Hellwig ino == EXT4_JOURNAL_INO || 15473dcf5451SChristoph Hellwig ino == EXT4_RESIZE_INO || 15483dcf5451SChristoph Hellwig (ino >= EXT4_FIRST_INO(sb) && 15493dcf5451SChristoph Hellwig ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); 15503dcf5451SChristoph Hellwig } 155119f5fb7aSTheodore Ts'o 155219f5fb7aSTheodore Ts'o /* 155319f5fb7aSTheodore Ts'o * Inode dynamic state flags 155419f5fb7aSTheodore Ts'o */ 155519f5fb7aSTheodore Ts'o enum { 155619f5fb7aSTheodore Ts'o EXT4_STATE_JDATA, /* journaled data exists */ 155719f5fb7aSTheodore Ts'o EXT4_STATE_NEW, /* inode is newly created */ 155819f5fb7aSTheodore Ts'o EXT4_STATE_XATTR, /* has in-inode xattrs */ 155919f5fb7aSTheodore Ts'o EXT4_STATE_NO_EXPAND, /* No space for expansion */ 156019f5fb7aSTheodore Ts'o EXT4_STATE_DA_ALLOC_CLOSE, /* Alloc DA blks on close */ 156119f5fb7aSTheodore Ts'o EXT4_STATE_EXT_MIGRATE, /* Inode is migrating */ 156219f5fb7aSTheodore Ts'o EXT4_STATE_DIO_UNWRITTEN, /* need convert on dio done*/ 156314ece102SFrank Mayhar EXT4_STATE_NEWENTRY, /* File just added to dir */ 156417335dccSDmitry Monakhov EXT4_STATE_DIOREAD_LOCK, /* Disable support for dio read 156517335dccSDmitry Monakhov nolocking */ 156667cf5b09STao Ma EXT4_STATE_MAY_INLINE_DATA, /* may have in-inode data */ 15677869a4a6STheodore Ts'o EXT4_STATE_EXT_PRECACHED, /* extents have been precached */ 1568a6d05676STahsin Erdogan EXT4_STATE_LUSTRE_EA_INODE, /* Lustre-style ea_inode */ 156919f5fb7aSTheodore Ts'o }; 157019f5fb7aSTheodore Ts'o 1571353eb83cSTheodore Ts'o #define EXT4_INODE_BIT_FNS(name, field, offset) \ 157212e9b892SDmitry Monakhov static inline int ext4_test_inode_##name(struct inode *inode, int bit) \ 157312e9b892SDmitry Monakhov { \ 1574353eb83cSTheodore Ts'o return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 157512e9b892SDmitry Monakhov } \ 157612e9b892SDmitry Monakhov static inline void ext4_set_inode_##name(struct inode *inode, int bit) \ 157712e9b892SDmitry Monakhov { \ 1578353eb83cSTheodore Ts'o set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 157912e9b892SDmitry Monakhov } \ 158012e9b892SDmitry Monakhov static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \ 158112e9b892SDmitry Monakhov { \ 1582353eb83cSTheodore Ts'o clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ 158319f5fb7aSTheodore Ts'o } 158419f5fb7aSTheodore Ts'o 15853f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 15863f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 15873f61c0ccSAndreas Dilger static inline int ext4_test_inode_flag(struct inode *inode, int bit); 15883f61c0ccSAndreas Dilger static inline void ext4_set_inode_flag(struct inode *inode, int bit); 15893f61c0ccSAndreas Dilger static inline void ext4_clear_inode_flag(struct inode *inode, int bit); 1590353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(flag, flags, 0) 15913f61c0ccSAndreas Dilger 15923f61c0ccSAndreas Dilger /* Add these declarations here only so that these functions can be 15933f61c0ccSAndreas Dilger * found by name. Otherwise, they are very hard to locate. */ 15943f61c0ccSAndreas Dilger static inline int ext4_test_inode_state(struct inode *inode, int bit); 15953f61c0ccSAndreas Dilger static inline void ext4_set_inode_state(struct inode *inode, int bit); 15963f61c0ccSAndreas Dilger static inline void ext4_clear_inode_state(struct inode *inode, int bit); 1597353eb83cSTheodore Ts'o #if (BITS_PER_LONG < 64) 1598353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, state_flags, 0) 1599353eb83cSTheodore Ts'o 1600353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1601353eb83cSTheodore Ts'o { 1602353eb83cSTheodore Ts'o (ei)->i_state_flags = 0; 1603353eb83cSTheodore Ts'o } 1604353eb83cSTheodore Ts'o #else 1605353eb83cSTheodore Ts'o EXT4_INODE_BIT_FNS(state, flags, 32) 1606353eb83cSTheodore Ts'o 1607353eb83cSTheodore Ts'o static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) 1608353eb83cSTheodore Ts'o { 1609353eb83cSTheodore Ts'o /* We depend on the fact that callers will set i_flags */ 1610353eb83cSTheodore Ts'o } 1611353eb83cSTheodore Ts'o #endif 16123dcf5451SChristoph Hellwig #else 16133dcf5451SChristoph Hellwig /* Assume that user mode programs are passing in an ext4fs superblock, not 16143dcf5451SChristoph Hellwig * a kernel struct super_block. This will allow us to call the feature-test 16153dcf5451SChristoph Hellwig * macros from user land. */ 16163dcf5451SChristoph Hellwig #define EXT4_SB(sb) (sb) 16173dcf5451SChristoph Hellwig #endif 16183dcf5451SChristoph Hellwig 1619b30ab0e0SMichael Halcrow /* 1620b30ab0e0SMichael Halcrow * Returns true if the inode is inode is encrypted 1621b30ab0e0SMichael Halcrow */ 16223dcf5451SChristoph Hellwig #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime 16233dcf5451SChristoph Hellwig 16243dcf5451SChristoph Hellwig /* 16253dcf5451SChristoph Hellwig * Codes for operating systems 16263dcf5451SChristoph Hellwig */ 16273dcf5451SChristoph Hellwig #define EXT4_OS_LINUX 0 16283dcf5451SChristoph Hellwig #define EXT4_OS_HURD 1 16293dcf5451SChristoph Hellwig #define EXT4_OS_MASIX 2 16303dcf5451SChristoph Hellwig #define EXT4_OS_FREEBSD 3 16313dcf5451SChristoph Hellwig #define EXT4_OS_LITES 4 16323dcf5451SChristoph Hellwig 16333dcf5451SChristoph Hellwig /* 16343dcf5451SChristoph Hellwig * Revision levels 16353dcf5451SChristoph Hellwig */ 16363dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ 16373dcf5451SChristoph Hellwig #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ 16383dcf5451SChristoph Hellwig 16393dcf5451SChristoph Hellwig #define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV 16403dcf5451SChristoph Hellwig #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV 16413dcf5451SChristoph Hellwig 16423dcf5451SChristoph Hellwig #define EXT4_GOOD_OLD_INODE_SIZE 128 16433dcf5451SChristoph Hellwig 16443dcf5451SChristoph Hellwig /* 16453dcf5451SChristoph Hellwig * Feature set definitions 16463dcf5451SChristoph Hellwig */ 16473dcf5451SChristoph Hellwig 16483dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 16493dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 16503dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 16513dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 16523dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 16533dcf5451SChristoph Hellwig #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 16541beeef1bSDarrick J. Wong #define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200 16553dcf5451SChristoph Hellwig 16563dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 16573dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 16583dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 16593dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 16603dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 16613dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 16623dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 1663ae812306SAditya Kali #define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100 1664281b5995STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200 1665e6153918SDarrick J. Wong /* 1666e6153918SDarrick J. Wong * METADATA_CSUM also enables group descriptor checksums (GDT_CSUM). When 1667e6153918SDarrick J. Wong * METADATA_CSUM is set, group descriptor checksums use the same algorithm as 1668e6153918SDarrick J. Wong * all other data structures' checksums. However, the METADATA_CSUM and 1669e6153918SDarrick J. Wong * GDT_CSUM bits are mutually exclusive. 1670e6153918SDarrick J. Wong */ 16719b90e5e0STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400 16722cb5cc8bSDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000 16738b4953e1STheodore Ts'o #define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000 16743dcf5451SChristoph Hellwig 16753dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 16763dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 16773dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ 16783dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ 16793dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 16803dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ 16813dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 16823dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 16833dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 1684f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */ 1685f710b4b9STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */ 16868c81bd8fSDarrick J. Wong #define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000 16879b90e5e0STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ 168867cf5b09STao Ma #define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ 16893edc18d8STheodore Ts'o #define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 16903dcf5451SChristoph Hellwig 1691e2b911c5SDarrick J. Wong #define EXT4_FEATURE_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_compat & \ 1695e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_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_compat |= \ 1700e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_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_compat &= \ 1705e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ 1706e2b911c5SDarrick J. Wong } 1707e2b911c5SDarrick J. Wong 1708e2b911c5SDarrick J. Wong #define EXT4_FEATURE_RO_COMPAT_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_ro_compat & \ 1712e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##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_ro_compat |= \ 1717e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##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_ro_compat &= \ 1722e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ 1723e2b911c5SDarrick J. Wong } 1724e2b911c5SDarrick J. Wong 1725e2b911c5SDarrick J. Wong #define EXT4_FEATURE_INCOMPAT_FUNCS(name, flagname) \ 1726e2b911c5SDarrick J. Wong static inline bool ext4_has_feature_##name(struct super_block *sb) \ 1727e2b911c5SDarrick J. Wong { \ 1728e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ 1729e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname)) != 0); \ 1730e2b911c5SDarrick J. Wong } \ 1731e2b911c5SDarrick J. Wong static inline void ext4_set_feature_##name(struct super_block *sb) \ 1732e2b911c5SDarrick J. Wong { \ 1733e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_incompat |= \ 1734e2b911c5SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ 1735e2b911c5SDarrick J. Wong } \ 1736e2b911c5SDarrick J. Wong static inline void ext4_clear_feature_##name(struct super_block *sb) \ 1737e2b911c5SDarrick J. Wong { \ 1738e2b911c5SDarrick J. Wong EXT4_SB(sb)->s_es->s_feature_incompat &= \ 1739e2b911c5SDarrick J. Wong ~cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ 1740e2b911c5SDarrick J. Wong } 1741e2b911c5SDarrick J. Wong 1742e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(dir_prealloc, DIR_PREALLOC) 1743e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(imagic_inodes, IMAGIC_INODES) 1744e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(journal, HAS_JOURNAL) 1745e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(xattr, EXT_ATTR) 1746e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(resize_inode, RESIZE_INODE) 1747e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(dir_index, DIR_INDEX) 1748e2b911c5SDarrick J. Wong EXT4_FEATURE_COMPAT_FUNCS(sparse_super2, SPARSE_SUPER2) 1749e2b911c5SDarrick J. Wong 1750e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(sparse_super, SPARSE_SUPER) 1751e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(large_file, LARGE_FILE) 1752e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(btree_dir, BTREE_DIR) 1753e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(huge_file, HUGE_FILE) 1754e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(gdt_csum, GDT_CSUM) 1755e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(dir_nlink, DIR_NLINK) 1756e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(extra_isize, EXTRA_ISIZE) 1757e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(quota, QUOTA) 1758e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(bigalloc, BIGALLOC) 1759e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(metadata_csum, METADATA_CSUM) 1760e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(readonly, READONLY) 1761e2b911c5SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_FUNCS(project, PROJECT) 1762e2b911c5SDarrick J. Wong 1763e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(compression, COMPRESSION) 1764e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(filetype, FILETYPE) 1765e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(journal_needs_recovery, RECOVER) 1766e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(journal_dev, JOURNAL_DEV) 1767e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(meta_bg, META_BG) 1768e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(extents, EXTENTS) 1769e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT) 1770e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(mmp, MMP) 1771e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(flex_bg, FLEX_BG) 1772e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(ea_inode, EA_INODE) 1773e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(dirdata, DIRDATA) 1774e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, CSUM_SEED) 1775e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(largedir, LARGEDIR) 1776e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, INLINE_DATA) 1777e2b911c5SDarrick J. Wong EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT) 1778e2b911c5SDarrick J. Wong 17792035e776STheodore Ts'o #define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 17802035e776STheodore Ts'o #define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 17812035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 17822035e776STheodore Ts'o #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 17832035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 17842035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 17852035e776STheodore Ts'o 17862035e776STheodore Ts'o #define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 17872035e776STheodore Ts'o #define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 17882035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_RECOVER| \ 17892035e776STheodore Ts'o EXT4_FEATURE_INCOMPAT_META_BG) 17902035e776STheodore Ts'o #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 17912035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 17922035e776STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BTREE_DIR) 17932035e776STheodore Ts'o 1794e2b911c5SDarrick J. Wong #define EXT4_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR 17953dcf5451SChristoph Hellwig #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ 17963dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_RECOVER| \ 17973dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_META_BG| \ 17983dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_EXTENTS| \ 17993dcf5451SChristoph Hellwig EXT4_FEATURE_INCOMPAT_64BIT| \ 1800c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_FLEX_BG| \ 1801e50e5129SAndreas Dilger EXT4_FEATURE_INCOMPAT_EA_INODE| \ 1802f08225d1STao Ma EXT4_FEATURE_INCOMPAT_MMP | \ 18036ddb2447STheodore Ts'o EXT4_FEATURE_INCOMPAT_INLINE_DATA | \ 18048c81bd8fSDarrick J. Wong EXT4_FEATURE_INCOMPAT_ENCRYPT | \ 1805e08ac99fSArtem Blagodarenko EXT4_FEATURE_INCOMPAT_CSUM_SEED | \ 1806e08ac99fSArtem Blagodarenko EXT4_FEATURE_INCOMPAT_LARGEDIR) 18073dcf5451SChristoph Hellwig #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ 18083dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ 18093dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ 18103dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ 18113dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ 18123dcf5451SChristoph Hellwig EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ 18136f16b606STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\ 1814e93376c2SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_BIGALLOC |\ 18157c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\ 1816040cb378SLi Xi EXT4_FEATURE_RO_COMPAT_QUOTA |\ 1817040cb378SLi Xi EXT4_FEATURE_RO_COMPAT_PROJECT) 18183dcf5451SChristoph Hellwig 1819e2b911c5SDarrick J. Wong #define EXTN_FEATURE_FUNCS(ver) \ 1820e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_compat_features(struct super_block *sb) \ 1821e2b911c5SDarrick J. Wong { \ 1822e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_compat & \ 1823e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_COMPAT_SUPP)) != 0); \ 1824e2b911c5SDarrick J. Wong } \ 1825e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_ro_compat_features(struct super_block *sb) \ 1826e2b911c5SDarrick J. Wong { \ 1827e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ 1828e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_RO_COMPAT_SUPP)) != 0); \ 1829e2b911c5SDarrick J. Wong } \ 1830e2b911c5SDarrick J. Wong static inline bool ext4_has_unknown_ext##ver##_incompat_features(struct super_block *sb) \ 1831e2b911c5SDarrick J. Wong { \ 1832e2b911c5SDarrick J. Wong return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ 1833e2b911c5SDarrick J. Wong cpu_to_le32(~EXT##ver##_FEATURE_INCOMPAT_SUPP)) != 0); \ 1834e2b911c5SDarrick J. Wong } 1835e2b911c5SDarrick J. Wong 1836e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(2) 1837e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(3) 1838e2b911c5SDarrick J. Wong EXTN_FEATURE_FUNCS(4) 1839e2b911c5SDarrick J. Wong 1840e2b911c5SDarrick J. Wong static inline bool ext4_has_compat_features(struct super_block *sb) 1841e2b911c5SDarrick J. Wong { 1842e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_compat != 0); 1843e2b911c5SDarrick J. Wong } 1844e2b911c5SDarrick J. Wong static inline bool ext4_has_ro_compat_features(struct super_block *sb) 1845e2b911c5SDarrick J. Wong { 1846e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_ro_compat != 0); 1847e2b911c5SDarrick J. Wong } 1848e2b911c5SDarrick J. Wong static inline bool ext4_has_incompat_features(struct super_block *sb) 1849e2b911c5SDarrick J. Wong { 1850e2b911c5SDarrick J. Wong return (EXT4_SB(sb)->s_es->s_feature_incompat != 0); 1851e2b911c5SDarrick J. Wong } 1852e2b911c5SDarrick J. Wong 18533dcf5451SChristoph Hellwig /* 18549549a168STheodore Ts'o * Superblock flags 18559549a168STheodore Ts'o */ 18569549a168STheodore Ts'o #define EXT4_FLAGS_RESIZING 0 18570db1ff22STheodore Ts'o #define EXT4_FLAGS_SHUTDOWN 1 18580db1ff22STheodore Ts'o 18590db1ff22STheodore Ts'o static inline int ext4_forced_shutdown(struct ext4_sb_info *sbi) 18600db1ff22STheodore Ts'o { 18610db1ff22STheodore Ts'o return test_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 18620db1ff22STheodore Ts'o } 18639549a168STheodore Ts'o 18649549a168STheodore Ts'o 18659549a168STheodore Ts'o /* 18663dcf5451SChristoph Hellwig * Default values for user and/or group using reserved blocks 18673dcf5451SChristoph Hellwig */ 18683dcf5451SChristoph Hellwig #define EXT4_DEF_RESUID 0 18693dcf5451SChristoph Hellwig #define EXT4_DEF_RESGID 0 18703dcf5451SChristoph Hellwig 1871040cb378SLi Xi /* 1872040cb378SLi Xi * Default project ID 1873040cb378SLi Xi */ 1874040cb378SLi Xi #define EXT4_DEF_PROJID 0 1875040cb378SLi Xi 1876240799cdSTheodore Ts'o #define EXT4_DEF_INODE_READAHEAD_BLKS 32 1877240799cdSTheodore Ts'o 18783dcf5451SChristoph Hellwig /* 18793dcf5451SChristoph Hellwig * Default mount options 18803dcf5451SChristoph Hellwig */ 18813dcf5451SChristoph Hellwig #define EXT4_DEFM_DEBUG 0x0001 18823dcf5451SChristoph Hellwig #define EXT4_DEFM_BSDGROUPS 0x0002 18833dcf5451SChristoph Hellwig #define EXT4_DEFM_XATTR_USER 0x0004 18843dcf5451SChristoph Hellwig #define EXT4_DEFM_ACL 0x0008 18853dcf5451SChristoph Hellwig #define EXT4_DEFM_UID16 0x0010 18863dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE 0x0060 18873dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_DATA 0x0020 18883dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_ORDERED 0x0040 18893dcf5451SChristoph Hellwig #define EXT4_DEFM_JMODE_WBACK 0x0060 18908b67f04aSTheodore Ts'o #define EXT4_DEFM_NOBARRIER 0x0100 18918b67f04aSTheodore Ts'o #define EXT4_DEFM_BLOCK_VALIDITY 0x0200 18928b67f04aSTheodore Ts'o #define EXT4_DEFM_DISCARD 0x0400 18938b67f04aSTheodore Ts'o #define EXT4_DEFM_NODELALLOC 0x0800 18943dcf5451SChristoph Hellwig 18953dcf5451SChristoph Hellwig /* 189630773840STheodore Ts'o * Default journal batch times 189730773840STheodore Ts'o */ 189830773840STheodore Ts'o #define EXT4_DEF_MIN_BATCH_TIME 0 189930773840STheodore Ts'o #define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ 190030773840STheodore Ts'o 190130773840STheodore Ts'o /* 1902a4912123STheodore Ts'o * Minimum number of groups in a flexgroup before we separate out 1903a4912123STheodore Ts'o * directories into the first block group of a flexgroup 1904a4912123STheodore Ts'o */ 1905a4912123STheodore Ts'o #define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4 1906a4912123STheodore Ts'o 1907a4912123STheodore Ts'o /* 19083dcf5451SChristoph Hellwig * Structure of a directory entry 19093dcf5451SChristoph Hellwig */ 19103dcf5451SChristoph Hellwig #define EXT4_NAME_LEN 255 19113dcf5451SChristoph Hellwig 19123dcf5451SChristoph Hellwig struct ext4_dir_entry { 19133dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 19143dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 19153dcf5451SChristoph Hellwig __le16 name_len; /* Name length */ 19163dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 19173dcf5451SChristoph Hellwig }; 19183dcf5451SChristoph Hellwig 19193dcf5451SChristoph Hellwig /* 19203dcf5451SChristoph Hellwig * The new version of the directory entry. Since EXT4 structures are 19213dcf5451SChristoph Hellwig * stored in intel byte order, and the name_len field could never be 19223dcf5451SChristoph Hellwig * bigger than 255 chars, it's safe to reclaim the extra byte for the 19233dcf5451SChristoph Hellwig * file_type field. 19243dcf5451SChristoph Hellwig */ 19253dcf5451SChristoph Hellwig struct ext4_dir_entry_2 { 19263dcf5451SChristoph Hellwig __le32 inode; /* Inode number */ 19273dcf5451SChristoph Hellwig __le16 rec_len; /* Directory entry length */ 19283dcf5451SChristoph Hellwig __u8 name_len; /* Name length */ 19293dcf5451SChristoph Hellwig __u8 file_type; 19303dcf5451SChristoph Hellwig char name[EXT4_NAME_LEN]; /* File name */ 19313dcf5451SChristoph Hellwig }; 19323dcf5451SChristoph Hellwig 19333dcf5451SChristoph Hellwig /* 1934e6153918SDarrick J. Wong * This is a bogus directory entry at the end of each leaf block that 1935e6153918SDarrick J. Wong * records checksums. 1936e6153918SDarrick J. Wong */ 1937e6153918SDarrick J. Wong struct ext4_dir_entry_tail { 1938e6153918SDarrick J. Wong __le32 det_reserved_zero1; /* Pretend to be unused */ 1939e6153918SDarrick J. Wong __le16 det_rec_len; /* 12 */ 1940e6153918SDarrick J. Wong __u8 det_reserved_zero2; /* Zero name length */ 1941e6153918SDarrick J. Wong __u8 det_reserved_ft; /* 0xDE, fake file type */ 1942e6153918SDarrick J. Wong __le32 det_checksum; /* crc32c(uuid+inum+dirblock) */ 1943e6153918SDarrick J. Wong }; 1944e6153918SDarrick J. Wong 19453c47d541STao Ma #define EXT4_DIRENT_TAIL(block, blocksize) \ 19463c47d541STao Ma ((struct ext4_dir_entry_tail *)(((void *)(block)) + \ 19473c47d541STao Ma ((blocksize) - \ 19483c47d541STao Ma sizeof(struct ext4_dir_entry_tail)))) 19493c47d541STao Ma 1950e6153918SDarrick J. Wong /* 19513dcf5451SChristoph Hellwig * Ext4 directory file types. Only the low 3 bits are used. The 19523dcf5451SChristoph Hellwig * other bits are reserved for now. 19533dcf5451SChristoph Hellwig */ 19543dcf5451SChristoph Hellwig #define EXT4_FT_UNKNOWN 0 19553dcf5451SChristoph Hellwig #define EXT4_FT_REG_FILE 1 19563dcf5451SChristoph Hellwig #define EXT4_FT_DIR 2 19573dcf5451SChristoph Hellwig #define EXT4_FT_CHRDEV 3 19583dcf5451SChristoph Hellwig #define EXT4_FT_BLKDEV 4 19593dcf5451SChristoph Hellwig #define EXT4_FT_FIFO 5 19603dcf5451SChristoph Hellwig #define EXT4_FT_SOCK 6 19613dcf5451SChristoph Hellwig #define EXT4_FT_SYMLINK 7 19623dcf5451SChristoph Hellwig 19633dcf5451SChristoph Hellwig #define EXT4_FT_MAX 8 19643dcf5451SChristoph Hellwig 1965e6153918SDarrick J. Wong #define EXT4_FT_DIR_CSUM 0xDE 1966e6153918SDarrick J. Wong 19673dcf5451SChristoph Hellwig /* 19683dcf5451SChristoph Hellwig * EXT4_DIR_PAD defines the directory entries boundaries 19693dcf5451SChristoph Hellwig * 19703dcf5451SChristoph Hellwig * NOTE: It must be a multiple of 4 19713dcf5451SChristoph Hellwig */ 19723dcf5451SChristoph Hellwig #define EXT4_DIR_PAD 4 19733dcf5451SChristoph Hellwig #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) 19743dcf5451SChristoph Hellwig #define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \ 19753dcf5451SChristoph Hellwig ~EXT4_DIR_ROUND) 19763dcf5451SChristoph Hellwig #define EXT4_MAX_REC_LEN ((1<<16)-1) 19773dcf5451SChristoph Hellwig 19783dcf5451SChristoph Hellwig /* 19790cfc9255SEric Sandeen * If we ever get support for fs block sizes > page_size, we'll need 19800cfc9255SEric Sandeen * to remove the #if statements in the next two functions... 19810cfc9255SEric Sandeen */ 19820cfc9255SEric Sandeen static inline unsigned int 19830cfc9255SEric Sandeen ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize) 19840cfc9255SEric Sandeen { 19850cfc9255SEric Sandeen unsigned len = le16_to_cpu(dlen); 19860cfc9255SEric Sandeen 1987ea1754a0SKirill A. Shutemov #if (PAGE_SIZE >= 65536) 19880cfc9255SEric Sandeen if (len == EXT4_MAX_REC_LEN || len == 0) 19890cfc9255SEric Sandeen return blocksize; 19900cfc9255SEric Sandeen return (len & 65532) | ((len & 3) << 16); 19910cfc9255SEric Sandeen #else 19920cfc9255SEric Sandeen return len; 19930cfc9255SEric Sandeen #endif 19940cfc9255SEric Sandeen } 19950cfc9255SEric Sandeen 19960cfc9255SEric Sandeen static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize) 19970cfc9255SEric Sandeen { 19980cfc9255SEric Sandeen if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3)) 19990cfc9255SEric Sandeen BUG(); 2000ea1754a0SKirill A. Shutemov #if (PAGE_SIZE >= 65536) 20010cfc9255SEric Sandeen if (len < 65536) 20020cfc9255SEric Sandeen return cpu_to_le16(len); 20030cfc9255SEric Sandeen if (len == blocksize) { 20040cfc9255SEric Sandeen if (blocksize == 65536) 20050cfc9255SEric Sandeen return cpu_to_le16(EXT4_MAX_REC_LEN); 20060cfc9255SEric Sandeen else 20070cfc9255SEric Sandeen return cpu_to_le16(0); 20080cfc9255SEric Sandeen } 20090cfc9255SEric Sandeen return cpu_to_le16((len & 65532) | ((len >> 16) & 3)); 20100cfc9255SEric Sandeen #else 20110cfc9255SEric Sandeen return cpu_to_le16(len); 20120cfc9255SEric Sandeen #endif 20130cfc9255SEric Sandeen } 20140cfc9255SEric Sandeen 20150cfc9255SEric Sandeen /* 20163dcf5451SChristoph Hellwig * Hash Tree Directory indexing 20173dcf5451SChristoph Hellwig * (c) Daniel Phillips, 2001 20183dcf5451SChristoph Hellwig */ 20193dcf5451SChristoph Hellwig 2020e2b911c5SDarrick J. Wong #define is_dx(dir) (ext4_has_feature_dir_index((dir)->i_sb) && \ 202112e9b892SDmitry Monakhov ext4_test_inode_flag((dir), EXT4_INODE_INDEX)) 2022c7414892SAndreas Dilger #define EXT4_DIR_LINK_MAX(dir) unlikely((dir)->i_nlink >= EXT4_LINK_MAX && \ 2023c7414892SAndreas Dilger !(ext4_has_feature_dir_nlink((dir)->i_sb) && is_dx(dir))) 20243dcf5451SChristoph Hellwig #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) 20253dcf5451SChristoph Hellwig 20263dcf5451SChristoph Hellwig /* Legal values for the dx_root hash_version field: */ 20273dcf5451SChristoph Hellwig 20283dcf5451SChristoph Hellwig #define DX_HASH_LEGACY 0 20293dcf5451SChristoph Hellwig #define DX_HASH_HALF_MD4 1 20303dcf5451SChristoph Hellwig #define DX_HASH_TEA 2 2031f99b2589STheodore Ts'o #define DX_HASH_LEGACY_UNSIGNED 3 2032f99b2589STheodore Ts'o #define DX_HASH_HALF_MD4_UNSIGNED 4 2033f99b2589STheodore Ts'o #define DX_HASH_TEA_UNSIGNED 5 20343dcf5451SChristoph Hellwig 20350441984aSDarrick J. Wong static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc, 20360441984aSDarrick J. Wong const void *address, unsigned int length) 20370441984aSDarrick J. Wong { 20380441984aSDarrick J. Wong struct { 20390441984aSDarrick J. Wong struct shash_desc shash; 20403108b54bSTheodore Ts'o char ctx[4]; 20410441984aSDarrick J. Wong } desc; 20420441984aSDarrick J. Wong int err; 20430441984aSDarrick J. Wong 20443108b54bSTheodore Ts'o BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx)); 20453108b54bSTheodore Ts'o 20460441984aSDarrick J. Wong desc.shash.tfm = sbi->s_chksum_driver; 20470441984aSDarrick J. Wong desc.shash.flags = 0; 20480441984aSDarrick J. Wong *(u32 *)desc.ctx = crc; 20490441984aSDarrick J. Wong 20500441984aSDarrick J. Wong err = crypto_shash_update(&desc.shash, address, length); 20510441984aSDarrick J. Wong BUG_ON(err); 20520441984aSDarrick J. Wong 20530441984aSDarrick J. Wong return *(u32 *)desc.ctx; 20540441984aSDarrick J. Wong } 20550441984aSDarrick J. Wong 20563dcf5451SChristoph Hellwig #ifdef __KERNEL__ 20573dcf5451SChristoph Hellwig 20583dcf5451SChristoph Hellwig /* hash info structure used by the directory hash */ 20593dcf5451SChristoph Hellwig struct dx_hash_info 20603dcf5451SChristoph Hellwig { 20613dcf5451SChristoph Hellwig u32 hash; 20623dcf5451SChristoph Hellwig u32 minor_hash; 20633dcf5451SChristoph Hellwig int hash_version; 20643dcf5451SChristoph Hellwig u32 *seed; 20653dcf5451SChristoph Hellwig }; 20663dcf5451SChristoph Hellwig 2067d1f5273eSFan Yong 2068d1f5273eSFan Yong /* 32 and 64 bit signed EOF for dx directories */ 2069d1f5273eSFan Yong #define EXT4_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1) 2070d1f5273eSFan Yong #define EXT4_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1) 2071d1f5273eSFan Yong 20723dcf5451SChristoph Hellwig 20733dcf5451SChristoph Hellwig /* 20743dcf5451SChristoph Hellwig * Control parameters used by ext4_htree_next_block 20753dcf5451SChristoph Hellwig */ 20763dcf5451SChristoph Hellwig #define HASH_NB_ALWAYS 1 20773dcf5451SChristoph Hellwig 20785b643f9cSTheodore Ts'o struct ext4_filename { 20795b643f9cSTheodore Ts'o const struct qstr *usr_fname; 2080a7550b30SJaegeuk Kim struct fscrypt_str disk_name; 20815b643f9cSTheodore Ts'o struct dx_hash_info hinfo; 20825b643f9cSTheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 2083a7550b30SJaegeuk Kim struct fscrypt_str crypto_buf; 20845b643f9cSTheodore Ts'o #endif 20855b643f9cSTheodore Ts'o }; 20865b643f9cSTheodore Ts'o 20875b643f9cSTheodore Ts'o #define fname_name(p) ((p)->disk_name.name) 20885b643f9cSTheodore Ts'o #define fname_len(p) ((p)->disk_name.len) 20893dcf5451SChristoph Hellwig 20903dcf5451SChristoph Hellwig /* 20913dcf5451SChristoph Hellwig * Describe an inode's exact location on disk and in memory 20923dcf5451SChristoph Hellwig */ 20933dcf5451SChristoph Hellwig struct ext4_iloc 20943dcf5451SChristoph Hellwig { 20953dcf5451SChristoph Hellwig struct buffer_head *bh; 20963dcf5451SChristoph Hellwig unsigned long offset; 20973dcf5451SChristoph Hellwig ext4_group_t block_group; 20983dcf5451SChristoph Hellwig }; 20993dcf5451SChristoph Hellwig 21003dcf5451SChristoph Hellwig static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) 21013dcf5451SChristoph Hellwig { 21023dcf5451SChristoph Hellwig return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); 21033dcf5451SChristoph Hellwig } 21043dcf5451SChristoph Hellwig 2105dec214d0STahsin Erdogan static inline bool ext4_is_quota_file(struct inode *inode) 2106dec214d0STahsin Erdogan { 2107dec214d0STahsin Erdogan return IS_NOQUOTA(inode) && 2108dec214d0STahsin Erdogan !(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL); 2109dec214d0STahsin Erdogan } 211002749a4cSTahsin Erdogan 21113dcf5451SChristoph Hellwig /* 21123dcf5451SChristoph Hellwig * This structure is stuffed into the struct file's private_data field 21133dcf5451SChristoph Hellwig * for directories. It is where we put information so that we can do 21143dcf5451SChristoph Hellwig * readdir operations in hash tree order. 21153dcf5451SChristoph Hellwig */ 21163dcf5451SChristoph Hellwig struct dir_private_info { 21173dcf5451SChristoph Hellwig struct rb_root root; 21183dcf5451SChristoph Hellwig struct rb_node *curr_node; 21193dcf5451SChristoph Hellwig struct fname *extra_fname; 21203dcf5451SChristoph Hellwig loff_t last_pos; 21213dcf5451SChristoph Hellwig __u32 curr_hash; 21223dcf5451SChristoph Hellwig __u32 curr_minor_hash; 21233dcf5451SChristoph Hellwig __u32 next_hash; 21243dcf5451SChristoph Hellwig }; 21253dcf5451SChristoph Hellwig 21263dcf5451SChristoph Hellwig /* calculate the first block number of the group */ 21273dcf5451SChristoph Hellwig static inline ext4_fsblk_t 21283dcf5451SChristoph Hellwig ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) 21293dcf5451SChristoph Hellwig { 21303dcf5451SChristoph Hellwig return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + 21313dcf5451SChristoph Hellwig le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); 21323dcf5451SChristoph Hellwig } 21333dcf5451SChristoph Hellwig 21343dcf5451SChristoph Hellwig /* 21353dcf5451SChristoph Hellwig * Special error return code only used by dx_probe() and its callers. 21363dcf5451SChristoph Hellwig */ 213736de9286STheodore Ts'o #define ERR_BAD_DX_DIR (-(MAX_ERRNO - 1)) 21383dcf5451SChristoph Hellwig 2139e08ac99fSArtem Blagodarenko /* htree levels for ext4 */ 2140e08ac99fSArtem Blagodarenko #define EXT4_HTREE_LEVEL_COMPAT 2 2141e08ac99fSArtem Blagodarenko #define EXT4_HTREE_LEVEL 3 2142e08ac99fSArtem Blagodarenko 2143e08ac99fSArtem Blagodarenko static inline int ext4_dir_htree_level(struct super_block *sb) 2144e08ac99fSArtem Blagodarenko { 2145e08ac99fSArtem Blagodarenko return ext4_has_feature_largedir(sb) ? 2146e08ac99fSArtem Blagodarenko EXT4_HTREE_LEVEL : EXT4_HTREE_LEVEL_COMPAT; 2147e08ac99fSArtem Blagodarenko } 2148e08ac99fSArtem Blagodarenko 21493dcf5451SChristoph Hellwig /* 2150bfff6873SLukas Czerner * Timeout and state flag for lazy initialization inode thread. 2151bfff6873SLukas Czerner */ 2152bfff6873SLukas Czerner #define EXT4_DEF_LI_WAIT_MULT 10 2153bfff6873SLukas Czerner #define EXT4_DEF_LI_MAX_START_DELAY 5 2154bfff6873SLukas Czerner #define EXT4_LAZYINIT_QUIT 0x0001 2155bfff6873SLukas Czerner #define EXT4_LAZYINIT_RUNNING 0x0002 2156bfff6873SLukas Czerner 2157bfff6873SLukas Czerner /* 2158bfff6873SLukas Czerner * Lazy inode table initialization info 2159bfff6873SLukas Czerner */ 2160bfff6873SLukas Czerner struct ext4_lazy_init { 2161bfff6873SLukas Czerner unsigned long li_state; 2162bfff6873SLukas Czerner struct list_head li_request_list; 2163bfff6873SLukas Czerner struct mutex li_list_mtx; 2164bfff6873SLukas Czerner }; 2165bfff6873SLukas Czerner 2166bfff6873SLukas Czerner struct ext4_li_request { 2167bfff6873SLukas Czerner struct super_block *lr_super; 2168bfff6873SLukas Czerner struct ext4_sb_info *lr_sbi; 2169bfff6873SLukas Czerner ext4_group_t lr_next_group; 2170bfff6873SLukas Czerner struct list_head lr_request; 2171bfff6873SLukas Czerner unsigned long lr_next_sched; 2172bfff6873SLukas Czerner unsigned long lr_timeout; 2173bfff6873SLukas Czerner }; 2174bfff6873SLukas Czerner 2175857ac889SLukas Czerner struct ext4_features { 2176857ac889SLukas Czerner struct kobject f_kobj; 2177857ac889SLukas Czerner struct completion f_kobj_unregister; 2178857ac889SLukas Czerner }; 2179857ac889SLukas Czerner 2180bfff6873SLukas Czerner /* 2181c5e06d10SJohann Lombardi * This structure will be used for multiple mount protection. It will be 2182c5e06d10SJohann Lombardi * written into the block number saved in the s_mmp_block field in the 2183c5e06d10SJohann Lombardi * superblock. Programs that check MMP should assume that if 2184c5e06d10SJohann Lombardi * SEQ_FSCK (or any unknown code above SEQ_MAX) is present then it is NOT safe 2185c5e06d10SJohann Lombardi * to use the filesystem, regardless of how old the timestamp is. 2186c5e06d10SJohann Lombardi */ 2187c5e06d10SJohann Lombardi #define EXT4_MMP_MAGIC 0x004D4D50U /* ASCII for MMP */ 2188c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U /* mmp_seq value for clean unmount */ 2189c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_FSCK 0xE24D4D50U /* mmp_seq value when being fscked */ 2190c5e06d10SJohann Lombardi #define EXT4_MMP_SEQ_MAX 0xE24D4D4FU /* maximum valid mmp_seq value */ 2191c5e06d10SJohann Lombardi 2192c5e06d10SJohann Lombardi struct mmp_struct { 2193c5e06d10SJohann Lombardi __le32 mmp_magic; /* Magic number for MMP */ 2194c5e06d10SJohann Lombardi __le32 mmp_seq; /* Sequence no. updated periodically */ 2195c5e06d10SJohann Lombardi 2196c5e06d10SJohann Lombardi /* 2197c5e06d10SJohann Lombardi * mmp_time, mmp_nodename & mmp_bdevname are only used for information 2198c5e06d10SJohann Lombardi * purposes and do not affect the correctness of the algorithm 2199c5e06d10SJohann Lombardi */ 2200c5e06d10SJohann Lombardi __le64 mmp_time; /* Time last updated */ 2201c5e06d10SJohann Lombardi char mmp_nodename[64]; /* Node which last updated MMP block */ 2202c5e06d10SJohann Lombardi char mmp_bdevname[32]; /* Bdev which last updated MMP block */ 2203c5e06d10SJohann Lombardi 2204c5e06d10SJohann Lombardi /* 2205c5e06d10SJohann Lombardi * mmp_check_interval is used to verify if the MMP block has been 2206c5e06d10SJohann Lombardi * updated on the block device. The value is updated based on the 2207c5e06d10SJohann Lombardi * maximum time to write the MMP block during an update cycle. 2208c5e06d10SJohann Lombardi */ 2209c5e06d10SJohann Lombardi __le16 mmp_check_interval; 2210c5e06d10SJohann Lombardi 2211c5e06d10SJohann Lombardi __le16 mmp_pad1; 2212e6153918SDarrick J. Wong __le32 mmp_pad2[226]; 2213e6153918SDarrick J. Wong __le32 mmp_checksum; /* crc32c(uuid+mmp_block) */ 2214c5e06d10SJohann Lombardi }; 2215c5e06d10SJohann Lombardi 2216c5e06d10SJohann Lombardi /* arguments passed to the mmp thread */ 2217c5e06d10SJohann Lombardi struct mmpd_data { 2218c5e06d10SJohann Lombardi struct buffer_head *bh; /* bh from initial read_mmp_block() */ 2219c5e06d10SJohann Lombardi struct super_block *sb; /* super block of the fs */ 2220c5e06d10SJohann Lombardi }; 2221c5e06d10SJohann Lombardi 2222c5e06d10SJohann Lombardi /* 2223c5e06d10SJohann Lombardi * Check interval multiplier 2224c5e06d10SJohann Lombardi * The MMP block is written every update interval and initially checked every 2225c5e06d10SJohann Lombardi * update interval x the multiplier (the value is then adapted based on the 2226c5e06d10SJohann Lombardi * write latency). The reason is that writes can be delayed under load and we 2227c5e06d10SJohann Lombardi * don't want readers to incorrectly assume that the filesystem is no longer 2228c5e06d10SJohann Lombardi * in use. 2229c5e06d10SJohann Lombardi */ 2230c5e06d10SJohann Lombardi #define EXT4_MMP_CHECK_MULT 2UL 2231c5e06d10SJohann Lombardi 2232c5e06d10SJohann Lombardi /* 2233c5e06d10SJohann Lombardi * Minimum interval for MMP checking in seconds. 2234c5e06d10SJohann Lombardi */ 2235c5e06d10SJohann Lombardi #define EXT4_MMP_MIN_CHECK_INTERVAL 5UL 2236c5e06d10SJohann Lombardi 2237c5e06d10SJohann Lombardi /* 2238c5e06d10SJohann Lombardi * Maximum interval for MMP checking in seconds. 2239c5e06d10SJohann Lombardi */ 2240c5e06d10SJohann Lombardi #define EXT4_MMP_MAX_CHECK_INTERVAL 300UL 2241c5e06d10SJohann Lombardi 2242c5e06d10SJohann Lombardi /* 22433dcf5451SChristoph Hellwig * Function prototypes 22443dcf5451SChristoph Hellwig */ 22453dcf5451SChristoph Hellwig 22463dcf5451SChristoph Hellwig /* 22473dcf5451SChristoph Hellwig * Ok, these declarations are also in <linux/kernel.h> but none of the 22483dcf5451SChristoph Hellwig * ext4 source programs needs to include it so they are duplicated here. 22493dcf5451SChristoph Hellwig */ 22503dcf5451SChristoph Hellwig # define NORET_TYPE /**/ 22513dcf5451SChristoph Hellwig # define ATTRIB_NORET __attribute__((noreturn)) 22523dcf5451SChristoph Hellwig # define NORET_AND noreturn, 22533dcf5451SChristoph Hellwig 2254498e5f24STheodore Ts'o /* bitmap.c */ 2255f6fb99caSTheodore Ts'o extern unsigned int ext4_count_free(char *bitmap, unsigned numchars); 225641a246d1SDarrick J. Wong void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 225741a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 225841a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 225941a246d1SDarrick J. Wong int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 226041a246d1SDarrick J. Wong struct ext4_group_desc *gdp, 226141a246d1SDarrick J. Wong struct buffer_head *bh, int sz); 2262fa77dcfaSDarrick J. Wong void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group, 2263fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 226479f1ba49STao Ma struct buffer_head *bh); 2265fa77dcfaSDarrick J. Wong int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, 2266fa77dcfaSDarrick J. Wong struct ext4_group_desc *gdp, 226779f1ba49STao Ma struct buffer_head *bh); 2268498e5f24STheodore Ts'o 22693dcf5451SChristoph Hellwig /* balloc.c */ 2270bd86298eSLukas Czerner extern void ext4_get_group_no_and_offset(struct super_block *sb, 2271bd86298eSLukas Czerner ext4_fsblk_t blocknr, 2272bd86298eSLukas Czerner ext4_group_t *blockgrpp, 2273bd86298eSLukas Czerner ext4_grpblk_t *offsetp); 2274bd86298eSLukas Czerner extern ext4_group_t ext4_get_group_number(struct super_block *sb, 2275bd86298eSLukas Czerner ext4_fsblk_t block); 2276bd86298eSLukas Czerner 22773dcf5451SChristoph Hellwig extern unsigned int ext4_block_group(struct super_block *sb, 22783dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 22793dcf5451SChristoph Hellwig extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, 22803dcf5451SChristoph Hellwig ext4_fsblk_t blocknr); 22813dcf5451SChristoph Hellwig extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); 22823dcf5451SChristoph Hellwig extern unsigned long ext4_bg_num_gdb(struct super_block *sb, 22833dcf5451SChristoph Hellwig ext4_group_t group); 22847061eba7SAneesh Kumar K.V extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, 228555f020dbSAllison Henderson ext4_fsblk_t goal, 228655f020dbSAllison Henderson unsigned int flags, 228755f020dbSAllison Henderson unsigned long *count, 228855f020dbSAllison Henderson int *errp); 2289e7d5f315STheodore Ts'o extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi, 2290e7d5f315STheodore Ts'o s64 nclusters, unsigned int flags); 22915dee5437STheodore Ts'o extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *); 22923dcf5451SChristoph Hellwig extern void ext4_check_blocks_bitmap(struct super_block *); 22933dcf5451SChristoph Hellwig extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, 22943dcf5451SChristoph Hellwig ext4_group_t block_group, 22953dcf5451SChristoph Hellwig struct buffer_head ** bh); 22963dcf5451SChristoph Hellwig extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); 2297813e5727STheodore Ts'o 2298813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb, 2299813e5727STheodore Ts'o ext4_group_t block_group); 2300813e5727STheodore Ts'o extern int ext4_wait_block_bitmap(struct super_block *sb, 2301813e5727STheodore Ts'o ext4_group_t block_group, 2302813e5727STheodore Ts'o struct buffer_head *bh); 2303813e5727STheodore Ts'o extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, 2304bb23c20aSTheodore Ts'o ext4_group_t block_group); 2305cff1dfd7STheodore Ts'o extern unsigned ext4_free_clusters_after_init(struct super_block *sb, 2306fd034a84STheodore Ts'o ext4_group_t block_group, 2307fd034a84STheodore Ts'o struct ext4_group_desc *gdp); 2308f86186b4SEric Sandeen ext4_fsblk_t ext4_inode_to_goal_block(struct inode *); 23093dcf5451SChristoph Hellwig 2310a7550b30SJaegeuk Kim static inline bool ext4_encrypted_inode(struct inode *inode) 2311d5d0e8c7SMichael Halcrow { 2312a7550b30SJaegeuk Kim return ext4_test_inode_flag(inode, EXT4_INODE_ENCRYPT); 2313d5d0e8c7SMichael Halcrow } 2314a7550b30SJaegeuk Kim 2315a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 2316a7550b30SJaegeuk Kim static inline int ext4_fname_setup_filename(struct inode *dir, 2317a7550b30SJaegeuk Kim const struct qstr *iname, 2318a7550b30SJaegeuk Kim int lookup, struct ext4_filename *fname) 2319a7550b30SJaegeuk Kim { 2320a7550b30SJaegeuk Kim struct fscrypt_name name; 2321a7550b30SJaegeuk Kim int err; 2322a7550b30SJaegeuk Kim 2323a7550b30SJaegeuk Kim memset(fname, 0, sizeof(struct ext4_filename)); 2324a7550b30SJaegeuk Kim 2325a7550b30SJaegeuk Kim err = fscrypt_setup_filename(dir, iname, lookup, &name); 2326a7550b30SJaegeuk Kim 2327a7550b30SJaegeuk Kim fname->usr_fname = name.usr_fname; 2328a7550b30SJaegeuk Kim fname->disk_name = name.disk_name; 2329a7550b30SJaegeuk Kim fname->hinfo.hash = name.hash; 2330a7550b30SJaegeuk Kim fname->hinfo.minor_hash = name.minor_hash; 2331a7550b30SJaegeuk Kim fname->crypto_buf = name.crypto_buf; 2332a7550b30SJaegeuk Kim return err; 2333a7550b30SJaegeuk Kim } 2334a7550b30SJaegeuk Kim 2335a7550b30SJaegeuk Kim static inline void ext4_fname_free_filename(struct ext4_filename *fname) 2336a7550b30SJaegeuk Kim { 2337a7550b30SJaegeuk Kim struct fscrypt_name name; 2338a7550b30SJaegeuk Kim 2339a7550b30SJaegeuk Kim name.crypto_buf = fname->crypto_buf; 2340a7550b30SJaegeuk Kim fscrypt_free_filename(&name); 2341a7550b30SJaegeuk Kim 2342a7550b30SJaegeuk Kim fname->crypto_buf.name = NULL; 2343a7550b30SJaegeuk Kim fname->usr_fname = NULL; 2344a7550b30SJaegeuk Kim fname->disk_name.name = NULL; 2345a7550b30SJaegeuk Kim } 2346a7550b30SJaegeuk Kim #else 23475b643f9cSTheodore Ts'o static inline int ext4_fname_setup_filename(struct inode *dir, 23485b643f9cSTheodore Ts'o const struct qstr *iname, 23495b643f9cSTheodore Ts'o int lookup, struct ext4_filename *fname) 23505b643f9cSTheodore Ts'o { 23515b643f9cSTheodore Ts'o fname->usr_fname = iname; 23525b643f9cSTheodore Ts'o fname->disk_name.name = (unsigned char *) iname->name; 23535b643f9cSTheodore Ts'o fname->disk_name.len = iname->len; 23545b643f9cSTheodore Ts'o return 0; 23555b643f9cSTheodore Ts'o } 23565b643f9cSTheodore Ts'o static inline void ext4_fname_free_filename(struct ext4_filename *fname) { } 2357a7550b30SJaegeuk Kim 2358d5d0e8c7SMichael Halcrow #endif 2359d5d0e8c7SMichael Halcrow 23603dcf5451SChristoph Hellwig /* dir.c */ 236160fd4da3STheodore Ts'o extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *, 2362f7c21177STheodore Ts'o struct file *, 23633dcf5451SChristoph Hellwig struct ext4_dir_entry_2 *, 2364226ba972STao Ma struct buffer_head *, char *, int, 2365226ba972STao Ma unsigned int); 2366226ba972STao Ma #define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \ 2367f7c21177STheodore Ts'o unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \ 2368226ba972STao Ma (de), (bh), (buf), (size), (offset))) 23693dcf5451SChristoph Hellwig extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, 23703dcf5451SChristoph Hellwig __u32 minor_hash, 23712f61830aSTheodore Ts'o struct ext4_dir_entry_2 *dirent, 2372a7550b30SJaegeuk Kim struct fscrypt_str *ent_name); 23733dcf5451SChristoph Hellwig extern void ext4_htree_free_dir_info(struct dir_private_info *p); 2374978fef91STao Ma extern int ext4_find_dest_de(struct inode *dir, struct inode *inode, 2375978fef91STao Ma struct buffer_head *bh, 2376978fef91STao Ma void *buf, int buf_size, 23775b643f9cSTheodore Ts'o struct ext4_filename *fname, 2378978fef91STao Ma struct ext4_dir_entry_2 **dest_de); 23791bc0af60SEric Biggers void ext4_insert_dentry(struct inode *inode, 2380978fef91STao Ma struct ext4_dir_entry_2 *de, 2381978fef91STao Ma int buf_size, 23825b643f9cSTheodore Ts'o struct ext4_filename *fname); 2383978fef91STao Ma static inline void ext4_update_dx_flag(struct inode *inode) 2384978fef91STao Ma { 2385e2b911c5SDarrick J. Wong if (!ext4_has_feature_dir_index(inode->i_sb)) 2386978fef91STao Ma ext4_clear_inode_flag(inode, EXT4_INODE_INDEX); 2387978fef91STao Ma } 2388d6006186SEric Biggers static const unsigned char ext4_filetype_table[] = { 238965d165d9STao Ma DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK 239065d165d9STao Ma }; 239165d165d9STao Ma 239265d165d9STao Ma static inline unsigned char get_dtype(struct super_block *sb, int filetype) 239365d165d9STao Ma { 2394e2b911c5SDarrick J. Wong if (!ext4_has_feature_filetype(sb) || filetype >= EXT4_FT_MAX) 239565d165d9STao Ma return DT_UNKNOWN; 239665d165d9STao Ma 239765d165d9STao Ma return ext4_filetype_table[filetype]; 239865d165d9STao Ma } 239940b163f1SDarrick J. Wong extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh, 240040b163f1SDarrick J. Wong void *buf, int buf_size); 24013dcf5451SChristoph Hellwig 24023dcf5451SChristoph Hellwig /* fsync.c */ 240302c24a82SJosef Bacik extern int ext4_sync_file(struct file *, loff_t, loff_t, int); 24043dcf5451SChristoph Hellwig 24053dcf5451SChristoph Hellwig /* hash.c */ 24063dcf5451SChristoph Hellwig extern int ext4fs_dirhash(const char *name, int len, struct 24073dcf5451SChristoph Hellwig dx_hash_info *hinfo); 24083dcf5451SChristoph Hellwig 24093dcf5451SChristoph Hellwig /* ialloc.c */ 24101139575aSTheodore Ts'o extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t, 24115cb81dabSDmitry Monakhov const struct qstr *qstr, __u32 goal, 24121b917ed8STahsin Erdogan uid_t *owner, __u32 i_flags, 24131b917ed8STahsin Erdogan int handle_type, unsigned int line_no, 24141b917ed8STahsin Erdogan int nblocks); 24151139575aSTheodore Ts'o 24161b917ed8STahsin Erdogan #define ext4_new_inode(handle, dir, mode, qstr, goal, owner, i_flags) \ 24171139575aSTheodore Ts'o __ext4_new_inode((handle), (dir), (mode), (qstr), (goal), (owner), \ 24181b917ed8STahsin Erdogan i_flags, 0, 0, 0) 24191139575aSTheodore Ts'o #define ext4_new_inode_start_handle(dir, mode, qstr, goal, owner, \ 24201139575aSTheodore Ts'o type, nblocks) \ 24211139575aSTheodore Ts'o __ext4_new_inode(NULL, (dir), (mode), (qstr), (goal), (owner), \ 24221b917ed8STahsin Erdogan 0, (type), __LINE__, (nblocks)) 24231139575aSTheodore Ts'o 24241139575aSTheodore Ts'o 24253dcf5451SChristoph Hellwig extern void ext4_free_inode(handle_t *, struct inode *); 24263dcf5451SChristoph Hellwig extern struct inode * ext4_orphan_get(struct super_block *, unsigned long); 24273dcf5451SChristoph Hellwig extern unsigned long ext4_count_free_inodes(struct super_block *); 24283dcf5451SChristoph Hellwig extern unsigned long ext4_count_dirs(struct super_block *); 24293dcf5451SChristoph Hellwig extern void ext4_check_inodes_bitmap(struct super_block *); 243061d08673STheodore Ts'o extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap); 2431bfff6873SLukas Czerner extern int ext4_init_inode_table(struct super_block *sb, 2432bfff6873SLukas Czerner ext4_group_t group, int barrier); 2433813e5727STheodore Ts'o extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate); 24343dcf5451SChristoph Hellwig 24353dcf5451SChristoph Hellwig /* mballoc.c */ 2436ebd173beSTheodore Ts'o extern const struct file_operations ext4_seq_mb_groups_fops; 24373dcf5451SChristoph Hellwig extern long ext4_mb_stats; 24383dcf5451SChristoph Hellwig extern long ext4_mb_max_to_scan; 24399d99012fSAkira Fujita extern int ext4_mb_init(struct super_block *); 24403dcf5451SChristoph Hellwig extern int ext4_mb_release(struct super_block *); 24413dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, 24423dcf5451SChristoph Hellwig struct ext4_allocation_request *, int *); 24433dcf5451SChristoph Hellwig extern int ext4_mb_reserve_blocks(struct super_block *, int); 2444c2ea3fdeSTheodore Ts'o extern void ext4_discard_preallocations(struct inode *); 24455dabfc78STheodore Ts'o extern int __init ext4_init_mballoc(void); 24465dabfc78STheodore Ts'o extern void ext4_exit_mballoc(void); 244744338711STheodore Ts'o extern void ext4_free_blocks(handle_t *handle, struct inode *inode, 2448e6362609STheodore Ts'o struct buffer_head *bh, ext4_fsblk_t block, 2449e6362609STheodore Ts'o unsigned long count, int flags); 245028623c2fSTheodore Ts'o extern int ext4_mb_alloc_groupinfo(struct super_block *sb, 245128623c2fSTheodore Ts'o ext4_group_t ngroups); 2452920313a7SAneesh Kumar K.V extern int ext4_mb_add_groupinfo(struct super_block *sb, 24535f21b0e6SFrederic Bohe ext4_group_t i, struct ext4_group_desc *desc); 2454cc7365dfSYongqiang Yang extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, 24552846e820SAmir Goldstein ext4_fsblk_t block, unsigned long count); 24567360d173SLukas Czerner extern int ext4_trim_fs(struct super_block *, struct fstrim_range *); 2457a0154344SDaeho Jeong extern void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid); 24587360d173SLukas Czerner 24593dcf5451SChristoph Hellwig /* inode.c */ 2460f348c252STheodore Ts'o int ext4_inode_is_fast_symlink(struct inode *inode); 246110560082STheodore Ts'o struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int); 24621c215028STheodore Ts'o struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int); 24639699d4f9STahsin Erdogan int ext4_bread_batch(struct inode *inode, ext4_lblk_t block, int bh_count, 24649699d4f9STahsin Erdogan bool wait, struct buffer_head **bhs); 2465705965bdSJan Kara int ext4_get_block_unwritten(struct inode *inode, sector_t iblock, 2466f19d5870STao Ma struct buffer_head *bh_result, int create); 24676873fa0dSEric Sandeen int ext4_get_block(struct inode *inode, sector_t iblock, 24686873fa0dSEric Sandeen struct buffer_head *bh_result, int create); 2469705965bdSJan Kara int ext4_dio_get_block(struct inode *inode, sector_t iblock, 2470705965bdSJan Kara struct buffer_head *bh_result, int create); 24719c3569b5STao Ma int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, 24729c3569b5STao Ma struct buffer_head *bh, int create); 2473f19d5870STao Ma int ext4_walk_page_buffers(handle_t *handle, 2474f19d5870STao Ma struct buffer_head *head, 2475f19d5870STao Ma unsigned from, 2476f19d5870STao Ma unsigned to, 2477f19d5870STao Ma int *partial, 2478f19d5870STao Ma int (*fn)(handle_t *handle, 2479f19d5870STao Ma struct buffer_head *bh)); 2480f19d5870STao Ma int do_journal_get_write_access(handle_t *handle, 2481f19d5870STao Ma struct buffer_head *bh); 24829c3569b5STao Ma #define FALL_BACK_TO_NONDELALLOC 1 24839c3569b5STao Ma #define CONVERT_INLINE_DATA 2 24843dcf5451SChristoph Hellwig 24853dcf5451SChristoph Hellwig extern struct inode *ext4_iget(struct super_block *, unsigned long); 2486f4bb2981STheodore Ts'o extern struct inode *ext4_iget_normal(struct super_block *, unsigned long); 2487a9185b41SChristoph Hellwig extern int ext4_write_inode(struct inode *, struct writeback_control *); 24883dcf5451SChristoph Hellwig extern int ext4_setattr(struct dentry *, struct iattr *); 2489a528d35eSDavid Howells extern int ext4_getattr(const struct path *, struct kstat *, u32, unsigned int); 24900930fcc1SAl Viro extern void ext4_evict_inode(struct inode *); 24910930fcc1SAl Viro extern void ext4_clear_inode(struct inode *); 249299652ea5SDavid Howells extern int ext4_file_getattr(const struct path *, struct kstat *, u32, unsigned int); 24933dcf5451SChristoph Hellwig extern int ext4_sync_inode(handle_t *, struct inode *); 2494aa385729SChristoph Hellwig extern void ext4_dirty_inode(struct inode *, int); 24953dcf5451SChristoph Hellwig extern int ext4_change_inode_journal_flag(struct inode *, int); 24963dcf5451SChristoph Hellwig extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); 2497a361293fSJan Kara extern int ext4_inode_attach_jinode(struct inode *inode); 249891ef4cafSDuane Griffin extern int ext4_can_truncate(struct inode *inode); 24992c98eb5eSTheodore Ts'o extern int ext4_truncate(struct inode *); 2500aeb2817aSAshish Sangwan extern int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length); 2501487caeefSJan Kara extern int ext4_truncate_restart_trans(handle_t *, struct inode *, int nblocks); 25023dcf5451SChristoph Hellwig extern void ext4_set_inode_flags(struct inode *); 2503ccd2506bSTheodore Ts'o extern int ext4_alloc_da_blocks(struct inode *inode); 25043dcf5451SChristoph Hellwig extern void ext4_set_aops(struct inode *inode); 25053dcf5451SChristoph Hellwig extern int ext4_writepage_trans_blocks(struct inode *); 2506f3bd1f3fSMingming Cao extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); 2507a87dd18cSLukas Czerner extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode, 2508a87dd18cSLukas Czerner loff_t lstart, loff_t lend); 250911bac800SDave Jiang extern int ext4_page_mkwrite(struct vm_fault *vmf); 251011bac800SDave Jiang extern int ext4_filemap_fault(struct vm_fault *vmf); 2511a9e7f447SDmitry Monakhov extern qsize_t *ext4_get_reserved_space(struct inode *inode); 2512040cb378SLi Xi extern int ext4_get_projid(struct inode *inode, kprojid_t *projid); 25135f634d06SAneesh Kumar K.V extern void ext4_da_update_reserve_space(struct inode *inode, 25145f634d06SAneesh Kumar K.V int used, int quota_claim); 251553085facSJan Kara extern int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk, 251653085facSJan Kara ext4_fsblk_t pblk, ext4_lblk_t len); 25172d90c160SJan Kara extern int ext4_get_next_extent(struct inode *inode, ext4_lblk_t lblk, 25182d90c160SJan Kara unsigned int map_len, 25192d90c160SJan Kara struct extent_status *result); 2520dae1e52cSAmir Goldstein 2521dae1e52cSAmir Goldstein /* indirect.c */ 2522dae1e52cSAmir Goldstein extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, 2523dae1e52cSAmir Goldstein struct ext4_map_blocks *map, int flags); 2524dae1e52cSAmir Goldstein extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock); 2525fa55a0edSJan Kara extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks); 2526819c4920STheodore Ts'o extern void ext4_ind_truncate(handle_t *, struct inode *inode); 25274f579ae7SLukas Czerner extern int ext4_ind_remove_space(handle_t *handle, struct inode *inode, 25284f579ae7SLukas Czerner ext4_lblk_t start, ext4_lblk_t end); 2529ff9893dcSAmir Goldstein 25303dcf5451SChristoph Hellwig /* ioctl.c */ 25313dcf5451SChristoph Hellwig extern long ext4_ioctl(struct file *, unsigned int, unsigned long); 25323dcf5451SChristoph Hellwig extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long); 25333dcf5451SChristoph Hellwig 25343dcf5451SChristoph Hellwig /* migrate.c */ 25352a43a878SAneesh Kumar K.V extern int ext4_ext_migrate(struct inode *); 25360d14b098SLukas Czerner extern int ext4_ind_migrate(struct inode *inode); 25373d0518f4SWei Yongjun 25383dcf5451SChristoph Hellwig /* namei.c */ 2539b0336e8dSDarrick J. Wong extern int ext4_dirent_csum_verify(struct inode *inode, 2540b0336e8dSDarrick J. Wong struct ext4_dir_entry *dirent); 25413dcf5451SChristoph Hellwig extern int ext4_orphan_add(handle_t *, struct inode *); 25423dcf5451SChristoph Hellwig extern int ext4_orphan_del(handle_t *, struct inode *); 25433dcf5451SChristoph Hellwig extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, 25443dcf5451SChristoph Hellwig __u32 start_minor_hash, __u32 *next_hash); 25455b643f9cSTheodore Ts'o extern int ext4_search_dir(struct buffer_head *bh, 25467335cd3bSTao Ma char *search_buf, 25477335cd3bSTao Ma int buf_size, 25487335cd3bSTao Ma struct inode *dir, 25495b643f9cSTheodore Ts'o struct ext4_filename *fname, 25507335cd3bSTao Ma unsigned int offset, 25517335cd3bSTao Ma struct ext4_dir_entry_2 **res_dir); 255205019a9eSTao Ma extern int ext4_generic_delete_entry(handle_t *handle, 255305019a9eSTao Ma struct inode *dir, 255405019a9eSTao Ma struct ext4_dir_entry_2 *de_del, 255505019a9eSTao Ma struct buffer_head *bh, 255605019a9eSTao Ma void *entry_buf, 255705019a9eSTao Ma int buf_size, 255805019a9eSTao Ma int csum_size); 2559a7550b30SJaegeuk Kim extern bool ext4_empty_dir(struct inode *inode); 25603dcf5451SChristoph Hellwig 25613dcf5451SChristoph Hellwig /* resize.c */ 25623dcf5451SChristoph Hellwig extern int ext4_group_add(struct super_block *sb, 25633dcf5451SChristoph Hellwig struct ext4_new_group_data *input); 25643dcf5451SChristoph Hellwig extern int ext4_group_extend(struct super_block *sb, 25653dcf5451SChristoph Hellwig struct ext4_super_block *es, 25663dcf5451SChristoph Hellwig ext4_fsblk_t n_blocks_count); 256719c5246dSYongqiang Yang extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count); 25683dcf5451SChristoph Hellwig 25693dcf5451SChristoph Hellwig /* super.c */ 2570ebd173beSTheodore Ts'o extern int ext4_seq_options_show(struct seq_file *seq, void *offset); 2571952fc18eSTheodore Ts'o extern int ext4_calculate_overhead(struct super_block *sb); 257206db49e6STheodore Ts'o extern void ext4_superblock_csum_set(struct super_block *sb); 25739933fc0aSTheodore Ts'o extern void *ext4_kvmalloc(size_t size, gfp_t flags); 25749933fc0aSTheodore Ts'o extern void *ext4_kvzalloc(size_t size, gfp_t flags); 2575117fff10STheodore Ts'o extern int ext4_alloc_flex_bg_array(struct super_block *sb, 2576117fff10STheodore Ts'o ext4_group_t ngroup); 2577722887ddSTheodore Ts'o extern const char *ext4_decode_error(struct super_block *sb, int errno, 2578722887ddSTheodore Ts'o char nbuf[16]); 2579e7c96e8eSJoe Perches 2580b9075fa9SJoe Perches extern __printf(4, 5) 2581b9075fa9SJoe Perches void __ext4_error(struct super_block *, const char *, unsigned int, 2582b9075fa9SJoe Perches const char *, ...); 2583b9075fa9SJoe Perches extern __printf(5, 6) 2584e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *, const char *, unsigned int, ext4_fsblk_t, 2585b9075fa9SJoe Perches const char *, ...); 2586b9075fa9SJoe Perches extern __printf(5, 6) 2587e7c96e8eSJoe Perches void __ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t, 2588b9075fa9SJoe Perches const char *, ...); 2589c398eda0STheodore Ts'o extern void __ext4_std_error(struct super_block *, const char *, 2590c398eda0STheodore Ts'o unsigned int, int); 2591b9075fa9SJoe Perches extern __printf(4, 5) 2592b9075fa9SJoe Perches void __ext4_abort(struct super_block *, const char *, unsigned int, 2593b9075fa9SJoe Perches const char *, ...); 2594b9075fa9SJoe Perches extern __printf(4, 5) 2595b9075fa9SJoe Perches void __ext4_warning(struct super_block *, const char *, unsigned int, 2596b9075fa9SJoe Perches const char *, ...); 2597b03a2f7eSAndreas Dilger extern __printf(4, 5) 2598b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 2599b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...); 2600b9075fa9SJoe Perches extern __printf(3, 4) 2601e7c96e8eSJoe Perches void __ext4_msg(struct super_block *, const char *, const char *, ...); 2602c5e06d10SJohann Lombardi extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp, 2603c5e06d10SJohann Lombardi const char *, unsigned int, const char *); 2604b9075fa9SJoe Perches extern __printf(7, 8) 2605b9075fa9SJoe Perches void __ext4_grp_locked_error(const char *, unsigned int, 2606b9075fa9SJoe Perches struct super_block *, ext4_group_t, 2607b9075fa9SJoe Perches unsigned long, ext4_fsblk_t, 2608b9075fa9SJoe Perches const char *, ...); 2609e7c96e8eSJoe Perches 2610b03a2f7eSAndreas Dilger #define EXT4_ERROR_INODE(inode, fmt, a...) \ 2611b03a2f7eSAndreas Dilger ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a) 2612b03a2f7eSAndreas Dilger 2613b03a2f7eSAndreas Dilger #define EXT4_ERROR_INODE_BLOCK(inode, block, fmt, a...) \ 2614b03a2f7eSAndreas Dilger ext4_error_inode((inode), __func__, __LINE__, (block), (fmt), ## a) 2615b03a2f7eSAndreas Dilger 2616b03a2f7eSAndreas Dilger #define EXT4_ERROR_FILE(file, block, fmt, a...) \ 2617b03a2f7eSAndreas Dilger ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a) 2618b03a2f7eSAndreas Dilger 2619e7c96e8eSJoe Perches #ifdef CONFIG_PRINTK 2620e7c96e8eSJoe Perches 2621e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 2622e7c96e8eSJoe Perches __ext4_error_inode(inode, func, line, block, fmt, ##__VA_ARGS__) 2623e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 2624e7c96e8eSJoe Perches __ext4_error_file(file, func, line, block, fmt, ##__VA_ARGS__) 2625e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 2626e7c96e8eSJoe Perches __ext4_error(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2627e7c96e8eSJoe Perches #define ext4_abort(sb, fmt, ...) \ 2628e7c96e8eSJoe Perches __ext4_abort(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2629e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 2630e7c96e8eSJoe Perches __ext4_warning(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) 2631b03a2f7eSAndreas Dilger #define ext4_warning_inode(inode, fmt, ...) \ 2632b03a2f7eSAndreas Dilger __ext4_warning_inode(inode, __func__, __LINE__, fmt, ##__VA_ARGS__) 2633e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 2634e7c96e8eSJoe Perches __ext4_msg(sb, level, fmt, ##__VA_ARGS__) 2635e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 2636e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, __func__, __LINE__, msg) 2637e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 2638e7c96e8eSJoe Perches __ext4_grp_locked_error(__func__, __LINE__, sb, grp, ino, block, \ 2639e7c96e8eSJoe Perches fmt, ##__VA_ARGS__) 2640e7c96e8eSJoe Perches 2641e7c96e8eSJoe Perches #else 2642e7c96e8eSJoe Perches 2643e7c96e8eSJoe Perches #define ext4_error_inode(inode, func, line, block, fmt, ...) \ 2644e7c96e8eSJoe Perches do { \ 2645e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2646e7c96e8eSJoe Perches __ext4_error_inode(inode, "", 0, block, " "); \ 2647e7c96e8eSJoe Perches } while (0) 2648e7c96e8eSJoe Perches #define ext4_error_file(file, func, line, block, fmt, ...) \ 2649e7c96e8eSJoe Perches do { \ 2650e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2651e7c96e8eSJoe Perches __ext4_error_file(file, "", 0, block, " "); \ 2652e7c96e8eSJoe Perches } while (0) 2653e7c96e8eSJoe Perches #define ext4_error(sb, fmt, ...) \ 2654e7c96e8eSJoe Perches do { \ 2655e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2656e7c96e8eSJoe Perches __ext4_error(sb, "", 0, " "); \ 2657e7c96e8eSJoe Perches } while (0) 2658e7c96e8eSJoe Perches #define ext4_abort(sb, fmt, ...) \ 2659e7c96e8eSJoe Perches do { \ 2660e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2661e7c96e8eSJoe Perches __ext4_abort(sb, "", 0, " "); \ 2662e7c96e8eSJoe Perches } while (0) 2663e7c96e8eSJoe Perches #define ext4_warning(sb, fmt, ...) \ 2664e7c96e8eSJoe Perches do { \ 2665e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2666e7c96e8eSJoe Perches __ext4_warning(sb, "", 0, " "); \ 2667e7c96e8eSJoe Perches } while (0) 2668b03a2f7eSAndreas Dilger #define ext4_warning_inode(inode, fmt, ...) \ 2669b03a2f7eSAndreas Dilger do { \ 2670b03a2f7eSAndreas Dilger no_printk(fmt, ##__VA_ARGS__); \ 2671b03a2f7eSAndreas Dilger __ext4_warning_inode(inode, "", 0, " "); \ 2672b03a2f7eSAndreas Dilger } while (0) 2673e7c96e8eSJoe Perches #define ext4_msg(sb, level, fmt, ...) \ 2674e7c96e8eSJoe Perches do { \ 2675e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2676e7c96e8eSJoe Perches __ext4_msg(sb, "", " "); \ 2677e7c96e8eSJoe Perches } while (0) 2678e7c96e8eSJoe Perches #define dump_mmp_msg(sb, mmp, msg) \ 2679e7c96e8eSJoe Perches __dump_mmp_msg(sb, mmp, "", 0, "") 2680e7c96e8eSJoe Perches #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ 2681e7c96e8eSJoe Perches do { \ 2682e7c96e8eSJoe Perches no_printk(fmt, ##__VA_ARGS__); \ 2683e7c96e8eSJoe Perches __ext4_grp_locked_error("", 0, sb, grp, ino, block, " "); \ 2684e7c96e8eSJoe Perches } while (0) 2685e7c96e8eSJoe Perches 2686e7c96e8eSJoe Perches #endif 2687e7c96e8eSJoe Perches 26883dcf5451SChristoph Hellwig extern void ext4_update_dynamic_rev(struct super_block *sb); 26893dcf5451SChristoph Hellwig extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb, 26903dcf5451SChristoph Hellwig __u32 compat); 26913dcf5451SChristoph Hellwig extern int ext4_update_rocompat_feature(handle_t *handle, 26923dcf5451SChristoph Hellwig struct super_block *sb, __u32 rocompat); 26933dcf5451SChristoph Hellwig extern int ext4_update_incompat_feature(handle_t *handle, 26943dcf5451SChristoph Hellwig struct super_block *sb, __u32 incompat); 26953dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 26963dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 26973dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 26983dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 26993dcf5451SChristoph Hellwig extern ext4_fsblk_t ext4_inode_table(struct super_block *sb, 27003dcf5451SChristoph Hellwig struct ext4_group_desc *bg); 2701021b65bbSTheodore Ts'o extern __u32 ext4_free_group_clusters(struct super_block *sb, 2702560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2703560671a0SAneesh Kumar K.V extern __u32 ext4_free_inodes_count(struct super_block *sb, 2704560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2705560671a0SAneesh Kumar K.V extern __u32 ext4_used_dirs_count(struct super_block *sb, 2706560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 2707560671a0SAneesh Kumar K.V extern __u32 ext4_itable_unused_count(struct super_block *sb, 2708560671a0SAneesh Kumar K.V struct ext4_group_desc *bg); 27093dcf5451SChristoph Hellwig extern void ext4_block_bitmap_set(struct super_block *sb, 27103dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 27113dcf5451SChristoph Hellwig extern void ext4_inode_bitmap_set(struct super_block *sb, 27123dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 27133dcf5451SChristoph Hellwig extern void ext4_inode_table_set(struct super_block *sb, 27143dcf5451SChristoph Hellwig struct ext4_group_desc *bg, ext4_fsblk_t blk); 2715021b65bbSTheodore Ts'o extern void ext4_free_group_clusters_set(struct super_block *sb, 2716021b65bbSTheodore Ts'o struct ext4_group_desc *bg, 2717021b65bbSTheodore Ts'o __u32 count); 2718560671a0SAneesh Kumar K.V extern void ext4_free_inodes_set(struct super_block *sb, 2719560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2720560671a0SAneesh Kumar K.V extern void ext4_used_dirs_set(struct super_block *sb, 2721560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2722560671a0SAneesh Kumar K.V extern void ext4_itable_unused_set(struct super_block *sb, 2723560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count); 2724feb0ab32SDarrick J. Wong extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group, 2725bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 2726feb0ab32SDarrick J. Wong extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group, 2727bb23c20aSTheodore Ts'o struct ext4_group_desc *gdp); 27287f511862STheodore Ts'o extern int ext4_register_li_request(struct super_block *sb, 27297f511862STheodore Ts'o ext4_group_t first_not_zeroed); 27303dcf5451SChristoph Hellwig 27319aa5d32bSDmitry Monakhov static inline int ext4_has_metadata_csum(struct super_block *sb) 27329aa5d32bSDmitry Monakhov { 2733e2b911c5SDarrick J. Wong WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) && 27349aa5d32bSDmitry Monakhov !EXT4_SB(sb)->s_chksum_driver); 27359aa5d32bSDmitry Monakhov 2736dec214d0STahsin Erdogan return ext4_has_feature_metadata_csum(sb) && 2737dec214d0STahsin Erdogan (EXT4_SB(sb)->s_chksum_driver != NULL); 27389aa5d32bSDmitry Monakhov } 2739dec214d0STahsin Erdogan 2740dec214d0STahsin Erdogan static inline int ext4_has_group_desc_csum(struct super_block *sb) 2741dec214d0STahsin Erdogan { 2742dec214d0STahsin Erdogan return ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb); 2743dec214d0STahsin Erdogan } 2744dec214d0STahsin Erdogan 27453dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) 27463dcf5451SChristoph Hellwig { 27473dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) | 27483dcf5451SChristoph Hellwig le32_to_cpu(es->s_blocks_count_lo); 27493dcf5451SChristoph Hellwig } 27503dcf5451SChristoph Hellwig 27513dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) 27523dcf5451SChristoph Hellwig { 27533dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) | 27543dcf5451SChristoph Hellwig le32_to_cpu(es->s_r_blocks_count_lo); 27553dcf5451SChristoph Hellwig } 27563dcf5451SChristoph Hellwig 27573dcf5451SChristoph Hellwig static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) 27583dcf5451SChristoph Hellwig { 27593dcf5451SChristoph Hellwig return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) | 27603dcf5451SChristoph Hellwig le32_to_cpu(es->s_free_blocks_count_lo); 27613dcf5451SChristoph Hellwig } 27623dcf5451SChristoph Hellwig 27633dcf5451SChristoph Hellwig static inline void ext4_blocks_count_set(struct ext4_super_block *es, 27643dcf5451SChristoph Hellwig ext4_fsblk_t blk) 27653dcf5451SChristoph Hellwig { 27663dcf5451SChristoph Hellwig es->s_blocks_count_lo = cpu_to_le32((u32)blk); 27673dcf5451SChristoph Hellwig es->s_blocks_count_hi = cpu_to_le32(blk >> 32); 27683dcf5451SChristoph Hellwig } 27693dcf5451SChristoph Hellwig 27703dcf5451SChristoph Hellwig static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, 27713dcf5451SChristoph Hellwig ext4_fsblk_t blk) 27723dcf5451SChristoph Hellwig { 27733dcf5451SChristoph Hellwig es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); 27743dcf5451SChristoph Hellwig es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); 27753dcf5451SChristoph Hellwig } 27763dcf5451SChristoph Hellwig 27773dcf5451SChristoph Hellwig static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, 27783dcf5451SChristoph Hellwig ext4_fsblk_t blk) 27793dcf5451SChristoph Hellwig { 27803dcf5451SChristoph Hellwig es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); 27813dcf5451SChristoph Hellwig es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); 27823dcf5451SChristoph Hellwig } 27833dcf5451SChristoph Hellwig 2784e08ac99fSArtem Blagodarenko static inline loff_t ext4_isize(struct super_block *sb, 2785e08ac99fSArtem Blagodarenko struct ext4_inode *raw_inode) 27863dcf5451SChristoph Hellwig { 2787e08ac99fSArtem Blagodarenko if (ext4_has_feature_largedir(sb) || 2788e08ac99fSArtem Blagodarenko S_ISREG(le16_to_cpu(raw_inode->i_mode))) 27893dcf5451SChristoph Hellwig return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | 27903dcf5451SChristoph Hellwig le32_to_cpu(raw_inode->i_size_lo); 2791e08ac99fSArtem Blagodarenko 279206a279d6STheodore Ts'o return (loff_t) le32_to_cpu(raw_inode->i_size_lo); 27933dcf5451SChristoph Hellwig } 27943dcf5451SChristoph Hellwig 27953dcf5451SChristoph Hellwig static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) 27963dcf5451SChristoph Hellwig { 27973dcf5451SChristoph Hellwig raw_inode->i_size_lo = cpu_to_le32(i_size); 27983dcf5451SChristoph Hellwig raw_inode->i_size_high = cpu_to_le32(i_size >> 32); 27993dcf5451SChristoph Hellwig } 28003dcf5451SChristoph Hellwig 28013dcf5451SChristoph Hellwig static inline 28023dcf5451SChristoph Hellwig struct ext4_group_info *ext4_get_group_info(struct super_block *sb, 28033dcf5451SChristoph Hellwig ext4_group_t group) 28043dcf5451SChristoph Hellwig { 28053dcf5451SChristoph Hellwig struct ext4_group_info ***grp_info; 28063dcf5451SChristoph Hellwig long indexv, indexh; 28072f2e09ebSTheodore Ts'o BUG_ON(group >= EXT4_SB(sb)->s_groups_count); 28083dcf5451SChristoph Hellwig grp_info = EXT4_SB(sb)->s_group_info; 28093dcf5451SChristoph Hellwig indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); 28103dcf5451SChristoph Hellwig indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); 28113dcf5451SChristoph Hellwig return grp_info[indexv][indexh]; 28123dcf5451SChristoph Hellwig } 28133dcf5451SChristoph Hellwig 28148df9675fSTheodore Ts'o /* 28158df9675fSTheodore Ts'o * Reading s_groups_count requires using smp_rmb() afterwards. See 28168df9675fSTheodore Ts'o * the locking protocol documented in the comments of ext4_group_add() 28178df9675fSTheodore Ts'o * in resize.c 28188df9675fSTheodore Ts'o */ 28198df9675fSTheodore Ts'o static inline ext4_group_t ext4_get_groups_count(struct super_block *sb) 28208df9675fSTheodore Ts'o { 28218df9675fSTheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 28228df9675fSTheodore Ts'o 28238df9675fSTheodore Ts'o smp_rmb(); 28248df9675fSTheodore Ts'o return ngroups; 28258df9675fSTheodore Ts'o } 28263dcf5451SChristoph Hellwig 2827772cb7c8SJose R. Santos static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, 2828772cb7c8SJose R. Santos ext4_group_t block_group) 2829772cb7c8SJose R. Santos { 2830772cb7c8SJose R. Santos return block_group >> sbi->s_log_groups_per_flex; 2831772cb7c8SJose R. Santos } 2832772cb7c8SJose R. Santos 2833772cb7c8SJose R. Santos static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi) 2834772cb7c8SJose R. Santos { 2835772cb7c8SJose R. Santos return 1 << sbi->s_log_groups_per_flex; 2836772cb7c8SJose R. Santos } 2837772cb7c8SJose R. Santos 28383dcf5451SChristoph Hellwig #define ext4_std_error(sb, errno) \ 28393dcf5451SChristoph Hellwig do { \ 28403dcf5451SChristoph Hellwig if ((errno)) \ 2841c398eda0STheodore Ts'o __ext4_std_error((sb), __func__, __LINE__, (errno)); \ 28423dcf5451SChristoph Hellwig } while (0) 28433dcf5451SChristoph Hellwig 2844a30d542aSAneesh Kumar K.V #ifdef CONFIG_SMP 2845df55c99dSTheodore Ts'o /* Each CPU can accumulate percpu_counter_batch clusters in their local 2846df55c99dSTheodore Ts'o * counters. So we need to make sure we have free clusters more 2847179f7ebfSEric Dumazet * than percpu_counter_batch * nr_cpu_ids. Also add a window of 4 times. 2848a30d542aSAneesh Kumar K.V */ 2849df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids)) 2850a30d542aSAneesh Kumar K.V #else 2851df55c99dSTheodore Ts'o #define EXT4_FREECLUSTERS_WATERMARK 0 2852a30d542aSAneesh Kumar K.V #endif 2853a30d542aSAneesh Kumar K.V 285490e775b7SJan Kara /* Update i_disksize. Requires i_mutex to avoid races with truncate */ 2855cf17fea6SAneesh Kumar K.V static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize) 2856cf17fea6SAneesh Kumar K.V { 285790e775b7SJan Kara WARN_ON_ONCE(S_ISREG(inode->i_mode) && 28585955102cSAl Viro !inode_is_locked(inode)); 2859cf17fea6SAneesh Kumar K.V down_write(&EXT4_I(inode)->i_data_sem); 2860cf17fea6SAneesh Kumar K.V if (newsize > EXT4_I(inode)->i_disksize) 2861cf17fea6SAneesh Kumar K.V EXT4_I(inode)->i_disksize = newsize; 2862cf17fea6SAneesh Kumar K.V up_write(&EXT4_I(inode)->i_data_sem); 286390e775b7SJan Kara } 286490e775b7SJan Kara 28654631dbf6SDmitry Monakhov /* Update i_size, i_disksize. Requires i_mutex to avoid races with truncate */ 28664631dbf6SDmitry Monakhov static inline int ext4_update_inode_size(struct inode *inode, loff_t newsize) 28674631dbf6SDmitry Monakhov { 28684631dbf6SDmitry Monakhov int changed = 0; 28694631dbf6SDmitry Monakhov 28704631dbf6SDmitry Monakhov if (newsize > inode->i_size) { 28714631dbf6SDmitry Monakhov i_size_write(inode, newsize); 28724631dbf6SDmitry Monakhov changed = 1; 28734631dbf6SDmitry Monakhov } 28744631dbf6SDmitry Monakhov if (newsize > EXT4_I(inode)->i_disksize) { 28754631dbf6SDmitry Monakhov ext4_update_i_disksize(inode, newsize); 28764631dbf6SDmitry Monakhov changed |= 2; 28774631dbf6SDmitry Monakhov } 28784631dbf6SDmitry Monakhov return changed; 28794631dbf6SDmitry Monakhov } 28804631dbf6SDmitry Monakhov 288101127848SJan Kara int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset, 288201127848SJan Kara loff_t len); 288301127848SJan Kara 28845d1b1b3fSAneesh Kumar K.V struct ext4_group_info { 28855d1b1b3fSAneesh Kumar K.V unsigned long bb_state; 28865d1b1b3fSAneesh Kumar K.V struct rb_root bb_free_root; 2887a36b4498SEric Sandeen ext4_grpblk_t bb_first_free; /* first free block */ 2888a36b4498SEric Sandeen ext4_grpblk_t bb_free; /* total free blocks */ 2889a36b4498SEric Sandeen ext4_grpblk_t bb_fragments; /* nr of freespace fragments */ 28908a57d9d6SCurt Wohlgemuth ext4_grpblk_t bb_largest_free_order;/* order of largest frag in BG */ 28915d1b1b3fSAneesh Kumar K.V struct list_head bb_prealloc_list; 28925d1b1b3fSAneesh Kumar K.V #ifdef DOUBLE_CHECK 28935d1b1b3fSAneesh Kumar K.V void *bb_bitmap; 28945d1b1b3fSAneesh Kumar K.V #endif 28955d1b1b3fSAneesh Kumar K.V struct rw_semaphore alloc_sem; 2896a36b4498SEric Sandeen ext4_grpblk_t bb_counters[]; /* Nr of free power-of-two-block 2897a36b4498SEric Sandeen * regions, index is order. 2898a36b4498SEric Sandeen * bb_counters[3] = 5 means 2899a36b4498SEric Sandeen * 5 free 8-block regions. */ 29005d1b1b3fSAneesh Kumar K.V }; 29015d1b1b3fSAneesh Kumar K.V 29025d1b1b3fSAneesh Kumar K.V #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 29033d56b8d2STao Ma #define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1 2904163a203dSDarrick J. Wong #define EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT 2 290587a39389SDarrick J. Wong #define EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT 3 29065d1b1b3fSAneesh Kumar K.V 29075d1b1b3fSAneesh Kumar K.V #define EXT4_MB_GRP_NEED_INIT(grp) \ 29085d1b1b3fSAneesh Kumar K.V (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) 2909163a203dSDarrick J. Wong #define EXT4_MB_GRP_BBITMAP_CORRUPT(grp) \ 2910163a203dSDarrick J. Wong (test_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 291187a39389SDarrick J. Wong #define EXT4_MB_GRP_IBITMAP_CORRUPT(grp) \ 291287a39389SDarrick J. Wong (test_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &((grp)->bb_state))) 29135d1b1b3fSAneesh Kumar K.V 29143d56b8d2STao Ma #define EXT4_MB_GRP_WAS_TRIMMED(grp) \ 29153d56b8d2STao Ma (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 29163d56b8d2STao Ma #define EXT4_MB_GRP_SET_TRIMMED(grp) \ 29173d56b8d2STao Ma (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 29183d56b8d2STao Ma #define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \ 29193d56b8d2STao Ma (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) 29203d56b8d2STao Ma 292150797481STheodore Ts'o #define EXT4_MAX_CONTENTION 8 292250797481STheodore Ts'o #define EXT4_CONTENTION_THRESHOLD 2 292350797481STheodore Ts'o 2924955ce5f5SAneesh Kumar K.V static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb, 2925955ce5f5SAneesh Kumar K.V ext4_group_t group) 2926955ce5f5SAneesh Kumar K.V { 2927955ce5f5SAneesh Kumar K.V return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group); 2928955ce5f5SAneesh Kumar K.V } 2929955ce5f5SAneesh Kumar K.V 293050797481STheodore Ts'o /* 293150797481STheodore Ts'o * Returns true if the filesystem is busy enough that attempts to 293250797481STheodore Ts'o * access the block group locks has run into contention. 293350797481STheodore Ts'o */ 293450797481STheodore Ts'o static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi) 293550797481STheodore Ts'o { 293650797481STheodore Ts'o return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD); 293750797481STheodore Ts'o } 293850797481STheodore Ts'o 29395d1b1b3fSAneesh Kumar K.V static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group) 29405d1b1b3fSAneesh Kumar K.V { 294150797481STheodore Ts'o spinlock_t *lock = ext4_group_lock_ptr(sb, group); 294250797481STheodore Ts'o if (spin_trylock(lock)) 294350797481STheodore Ts'o /* 294450797481STheodore Ts'o * We're able to grab the lock right away, so drop the 294550797481STheodore Ts'o * lock contention counter. 294650797481STheodore Ts'o */ 294750797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0); 294850797481STheodore Ts'o else { 294950797481STheodore Ts'o /* 295050797481STheodore Ts'o * The lock is busy, so bump the contention counter, 295150797481STheodore Ts'o * and then wait on the spin lock. 295250797481STheodore Ts'o */ 295350797481STheodore Ts'o atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1, 295450797481STheodore Ts'o EXT4_MAX_CONTENTION); 295550797481STheodore Ts'o spin_lock(lock); 295650797481STheodore Ts'o } 29575d1b1b3fSAneesh Kumar K.V } 29585d1b1b3fSAneesh Kumar K.V 29595d1b1b3fSAneesh Kumar K.V static inline void ext4_unlock_group(struct super_block *sb, 29605d1b1b3fSAneesh Kumar K.V ext4_group_t group) 29615d1b1b3fSAneesh Kumar K.V { 2962955ce5f5SAneesh Kumar K.V spin_unlock(ext4_group_lock_ptr(sb, group)); 29635d1b1b3fSAneesh Kumar K.V } 29645d1b1b3fSAneesh Kumar K.V 29653dcf5451SChristoph Hellwig /* 29661f7d1e77STheodore Ts'o * Block validity checking 29671f7d1e77STheodore Ts'o */ 29681f7d1e77STheodore Ts'o #define ext4_check_indirect_blockref(inode, bh) \ 29691f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 29701f7d1e77STheodore Ts'o (__le32 *)(bh)->b_data, \ 29711f7d1e77STheodore Ts'o EXT4_ADDR_PER_BLOCK((inode)->i_sb)) 29721f7d1e77STheodore Ts'o 29731f7d1e77STheodore Ts'o #define ext4_ind_check_inode(inode) \ 29741f7d1e77STheodore Ts'o ext4_check_blockref(__func__, __LINE__, inode, \ 29751f7d1e77STheodore Ts'o EXT4_I(inode)->i_data, \ 29761f7d1e77STheodore Ts'o EXT4_NDIR_BLOCKS) 29771f7d1e77STheodore Ts'o 29781f7d1e77STheodore Ts'o /* 29793dcf5451SChristoph Hellwig * Inodes and files operations 29803dcf5451SChristoph Hellwig */ 29813dcf5451SChristoph Hellwig 29823dcf5451SChristoph Hellwig /* dir.c */ 29833dcf5451SChristoph Hellwig extern const struct file_operations ext4_dir_operations; 29843dcf5451SChristoph Hellwig 29853dcf5451SChristoph Hellwig /* file.c */ 29863dcf5451SChristoph Hellwig extern const struct inode_operations ext4_file_inode_operations; 29873dcf5451SChristoph Hellwig extern const struct file_operations ext4_file_operations; 2988e0d10bfaSToshiyuki Okajima extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin); 29893dcf5451SChristoph Hellwig 299095eaefbdSTheodore Ts'o /* inline.c */ 299195eaefbdSTheodore Ts'o extern int ext4_get_max_inline_size(struct inode *inode); 299295eaefbdSTheodore Ts'o extern int ext4_find_inline_data_nolock(struct inode *inode); 299395eaefbdSTheodore Ts'o extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, 299495eaefbdSTheodore Ts'o unsigned int len); 299595eaefbdSTheodore Ts'o extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); 299695eaefbdSTheodore Ts'o 299795eaefbdSTheodore Ts'o extern int ext4_readpage_inline(struct inode *inode, struct page *page); 299895eaefbdSTheodore Ts'o extern int ext4_try_to_write_inline_data(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 extern int ext4_write_inline_data_end(struct inode *inode, 300495eaefbdSTheodore Ts'o loff_t pos, unsigned len, 300595eaefbdSTheodore Ts'o unsigned copied, 300695eaefbdSTheodore Ts'o struct page *page); 300795eaefbdSTheodore Ts'o extern struct buffer_head * 300895eaefbdSTheodore Ts'o ext4_journalled_write_inline_data(struct inode *inode, 300995eaefbdSTheodore Ts'o unsigned len, 301095eaefbdSTheodore Ts'o struct page *page); 301195eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_begin(struct address_space *mapping, 301295eaefbdSTheodore Ts'o struct inode *inode, 301395eaefbdSTheodore Ts'o loff_t pos, unsigned len, 301495eaefbdSTheodore Ts'o unsigned flags, 301595eaefbdSTheodore Ts'o struct page **pagep, 301695eaefbdSTheodore Ts'o void **fsdata); 301795eaefbdSTheodore Ts'o extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, 301895eaefbdSTheodore Ts'o unsigned len, unsigned copied, 301995eaefbdSTheodore Ts'o struct page *page); 30205b643f9cSTheodore Ts'o extern int ext4_try_add_inline_entry(handle_t *handle, 30215b643f9cSTheodore Ts'o struct ext4_filename *fname, 302256a04915STheodore Ts'o struct inode *dir, struct inode *inode); 302395eaefbdSTheodore Ts'o extern int ext4_try_create_inline_dir(handle_t *handle, 302495eaefbdSTheodore Ts'o struct inode *parent, 302595eaefbdSTheodore Ts'o struct inode *inode); 302695eaefbdSTheodore Ts'o extern int ext4_read_inline_dir(struct file *filp, 3027725bebb2SAl Viro struct dir_context *ctx, 302895eaefbdSTheodore Ts'o int *has_inline_data); 30298af0f082STao Ma extern int htree_inlinedir_to_tree(struct file *dir_file, 30308af0f082STao Ma struct inode *dir, ext4_lblk_t block, 30318af0f082STao Ma struct dx_hash_info *hinfo, 30328af0f082STao Ma __u32 start_hash, __u32 start_minor_hash, 30338af0f082STao Ma int *has_inline_data); 303495eaefbdSTheodore Ts'o extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, 30355b643f9cSTheodore Ts'o struct ext4_filename *fname, 303695eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **res_dir, 303795eaefbdSTheodore Ts'o int *has_inline_data); 303895eaefbdSTheodore Ts'o extern int ext4_delete_inline_entry(handle_t *handle, 303995eaefbdSTheodore Ts'o struct inode *dir, 304095eaefbdSTheodore Ts'o struct ext4_dir_entry_2 *de_del, 304195eaefbdSTheodore Ts'o struct buffer_head *bh, 304295eaefbdSTheodore Ts'o int *has_inline_data); 3043a7550b30SJaegeuk Kim extern bool empty_inline_dir(struct inode *dir, int *has_inline_data); 304495eaefbdSTheodore Ts'o extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, 304595eaefbdSTheodore Ts'o struct ext4_dir_entry_2 **parent_de, 304695eaefbdSTheodore Ts'o int *retval); 304795eaefbdSTheodore Ts'o extern int ext4_inline_data_fiemap(struct inode *inode, 304895eaefbdSTheodore Ts'o struct fiemap_extent_info *fieinfo, 3049d952d69eSDmitry Monakhov int *has_inline, __u64 start, __u64 len); 305095eaefbdSTheodore Ts'o extern int ext4_try_to_evict_inline_data(handle_t *handle, 305195eaefbdSTheodore Ts'o struct inode *inode, 305295eaefbdSTheodore Ts'o int needed); 305301daf945STheodore Ts'o extern int ext4_inline_data_truncate(struct inode *inode, int *has_inline); 305495eaefbdSTheodore Ts'o 305595eaefbdSTheodore Ts'o extern int ext4_convert_inline_data(struct inode *inode); 305695eaefbdSTheodore Ts'o 305783447ccbSZheng Liu static inline int ext4_has_inline_data(struct inode *inode) 305883447ccbSZheng Liu { 305983447ccbSZheng Liu return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) && 306083447ccbSZheng Liu EXT4_I(inode)->i_inline_off; 306183447ccbSZheng Liu } 306283447ccbSZheng Liu 30633dcf5451SChristoph Hellwig /* namei.c */ 30643dcf5451SChristoph Hellwig extern const struct inode_operations ext4_dir_inode_operations; 30653dcf5451SChristoph Hellwig extern const struct inode_operations ext4_special_inode_operations; 3066596397b7STheodore Ts'o extern struct dentry *ext4_get_parent(struct dentry *child); 3067a774f9c2STao Ma extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode, 3068a774f9c2STao Ma struct ext4_dir_entry_2 *de, 3069a774f9c2STao Ma int blocksize, int csum_size, 3070a774f9c2STao Ma unsigned int parent_ino, int dotdot_real_len); 30713c47d541STao Ma extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t, 30723c47d541STao Ma unsigned int blocksize); 30733c47d541STao Ma extern int ext4_handle_dirty_dirent_node(handle_t *handle, 30743c47d541STao Ma struct inode *inode, 30753c47d541STao Ma struct buffer_head *bh); 30768af0f082STao Ma #define S_SHIFT 12 3077381cebfeSDan Carpenter static const unsigned char ext4_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = { 30788af0f082STao Ma [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE, 30798af0f082STao Ma [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR, 30808af0f082STao Ma [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV, 30818af0f082STao Ma [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV, 30828af0f082STao Ma [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO, 30838af0f082STao Ma [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK, 30848af0f082STao Ma [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK, 30858af0f082STao Ma }; 30868af0f082STao Ma 30878af0f082STao Ma static inline void ext4_set_de_type(struct super_block *sb, 30888af0f082STao Ma struct ext4_dir_entry_2 *de, 30898af0f082STao Ma umode_t mode) { 3090e2b911c5SDarrick J. Wong if (ext4_has_feature_filetype(sb)) 30918af0f082STao Ma de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; 30928af0f082STao Ma } 30938af0f082STao Ma 3094f64e02feSTheodore Ts'o /* readpages.c */ 3095f64e02feSTheodore Ts'o extern int ext4_mpage_readpages(struct address_space *mapping, 3096f64e02feSTheodore Ts'o struct list_head *pages, struct page *page, 3097f64e02feSTheodore Ts'o unsigned nr_pages); 30983dcf5451SChristoph Hellwig 30993dcf5451SChristoph Hellwig /* symlink.c */ 3100a7a67e8aSAl Viro extern const struct inode_operations ext4_encrypted_symlink_inode_operations; 31013dcf5451SChristoph Hellwig extern const struct inode_operations ext4_symlink_inode_operations; 31023dcf5451SChristoph Hellwig extern const struct inode_operations ext4_fast_symlink_inode_operations; 31033dcf5451SChristoph Hellwig 3104b5799018STheodore Ts'o /* sysfs.c */ 3105b5799018STheodore Ts'o extern int ext4_register_sysfs(struct super_block *sb); 3106ebd173beSTheodore Ts'o extern void ext4_unregister_sysfs(struct super_block *sb); 3107b5799018STheodore Ts'o extern int __init ext4_init_sysfs(void); 3108b5799018STheodore Ts'o extern void ext4_exit_sysfs(void); 3109b5799018STheodore Ts'o 31106fd058f7STheodore Ts'o /* block_validity */ 31116fd058f7STheodore Ts'o extern void ext4_release_system_zone(struct super_block *sb); 31126fd058f7STheodore Ts'o extern int ext4_setup_system_zone(struct super_block *sb); 31135dabfc78STheodore Ts'o extern int __init ext4_init_system_zone(void); 31145dabfc78STheodore Ts'o extern void ext4_exit_system_zone(void); 31156fd058f7STheodore Ts'o extern int ext4_data_block_valid(struct ext4_sb_info *sbi, 31166fd058f7STheodore Ts'o ext4_fsblk_t start_blk, 31176fd058f7STheodore Ts'o unsigned int count); 31181f7d1e77STheodore Ts'o extern int ext4_check_blockref(const char *, unsigned int, 31191f7d1e77STheodore Ts'o struct inode *, __le32 *, unsigned int); 31206fd058f7STheodore Ts'o 31213dcf5451SChristoph Hellwig /* extents.c */ 31224a092d73STheodore Ts'o struct ext4_ext_path; 31234a092d73STheodore Ts'o struct ext4_extent; 31244a092d73STheodore Ts'o 3125d7b2a00cSZheng Liu /* 3126d7b2a00cSZheng Liu * Maximum number of logical blocks in a file; ext4_extent's ee_block is 3127d7b2a00cSZheng Liu * __le32. 3128d7b2a00cSZheng Liu */ 3129d7b2a00cSZheng Liu #define EXT_MAX_BLOCKS 0xffffffff 3130d7b2a00cSZheng Liu 31313dcf5451SChristoph Hellwig extern int ext4_ext_tree_init(handle_t *handle, struct inode *); 31323dcf5451SChristoph Hellwig extern int ext4_ext_writepage_trans_blocks(struct inode *, int); 3133fffb2739SJan Kara extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents); 3134e35fd660STheodore Ts'o extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, 3135e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 3136d0abb36dSTheodore Ts'o extern int ext4_ext_truncate(handle_t *, struct inode *); 313726a4c0c6STheodore Ts'o extern int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start, 313826a4c0c6STheodore Ts'o ext4_lblk_t end); 31393dcf5451SChristoph Hellwig extern void ext4_ext_init(struct super_block *); 31403dcf5451SChristoph Hellwig extern void ext4_ext_release(struct super_block *); 31412fe17c10SChristoph Hellwig extern long ext4_fallocate(struct file *file, int mode, loff_t offset, 31423dcf5451SChristoph Hellwig loff_t len); 31436b523df4SJan Kara extern int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode, 31446b523df4SJan Kara loff_t offset, ssize_t len); 3145e35fd660STheodore Ts'o extern int ext4_map_blocks(handle_t *handle, struct inode *inode, 3146e35fd660STheodore Ts'o struct ext4_map_blocks *map, int flags); 31474a092d73STheodore Ts'o extern int ext4_ext_calc_metadata_amount(struct inode *inode, 31484a092d73STheodore Ts'o ext4_lblk_t lblocks); 31494a092d73STheodore Ts'o extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode, 31504a092d73STheodore Ts'o int num, 31514a092d73STheodore Ts'o struct ext4_ext_path *path); 31524a092d73STheodore Ts'o extern int ext4_can_extents_be_merged(struct inode *inode, 31534a092d73STheodore Ts'o struct ext4_extent *ex1, 31544a092d73STheodore Ts'o struct ext4_extent *ex2); 31554a092d73STheodore Ts'o extern int ext4_ext_insert_extent(handle_t *, struct inode *, 3156dfe50809STheodore Ts'o struct ext4_ext_path **, 31574a092d73STheodore Ts'o struct ext4_extent *, int); 3158ed8a1a76STheodore Ts'o extern struct ext4_ext_path *ext4_find_extent(struct inode *, ext4_lblk_t, 3159705912caSTheodore Ts'o struct ext4_ext_path **, 3160107a7bd3STheodore Ts'o int flags); 31614a092d73STheodore Ts'o extern void ext4_ext_drop_refs(struct ext4_ext_path *); 31624a092d73STheodore Ts'o extern int ext4_ext_check_inode(struct inode *inode); 3163f7fec032SZheng Liu extern int ext4_find_delalloc_range(struct inode *inode, 3164f7fec032SZheng Liu ext4_lblk_t lblk_start, 3165f7fec032SZheng Liu ext4_lblk_t lblk_end); 31664a092d73STheodore Ts'o extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk); 3167fcf6b1b7SDmitry Monakhov extern ext4_lblk_t ext4_ext_next_allocated_block(struct ext4_ext_path *path); 31683a06d778SAneesh Kumar K.V extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 31693a06d778SAneesh Kumar K.V __u64 start, __u64 len); 31707869a4a6STheodore Ts'o extern int ext4_ext_precache(struct inode *inode); 31719eb79482SNamjae Jeon extern int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len); 3172331573feSNamjae Jeon extern int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len); 3173fcf6b1b7SDmitry Monakhov extern int ext4_swap_extents(handle_t *handle, struct inode *inode1, 3174fcf6b1b7SDmitry Monakhov struct inode *inode2, ext4_lblk_t lblk1, 3175fcf6b1b7SDmitry Monakhov ext4_lblk_t lblk2, ext4_lblk_t count, 3176fcf6b1b7SDmitry Monakhov int mark_unwritten,int *err); 31774a092d73STheodore Ts'o 3178748de673SAkira Fujita /* move_extent.c */ 3179393d1d1dSDr. Tilmann Bubeck extern void ext4_double_down_write_data_sem(struct inode *first, 3180393d1d1dSDr. Tilmann Bubeck struct inode *second); 3181393d1d1dSDr. Tilmann Bubeck extern void ext4_double_up_write_data_sem(struct inode *orig_inode, 3182393d1d1dSDr. Tilmann Bubeck struct inode *donor_inode); 3183748de673SAkira Fujita extern int ext4_move_extents(struct file *o_filp, struct file *d_filp, 3184748de673SAkira Fujita __u64 start_orig, __u64 start_donor, 3185748de673SAkira Fujita __u64 len, __u64 *moved_len); 3186748de673SAkira Fujita 3187bd2d0210STheodore Ts'o /* page-io.c */ 31885dabfc78STheodore Ts'o extern int __init ext4_init_pageio(void); 31895dabfc78STheodore Ts'o extern void ext4_exit_pageio(void); 3190bd2d0210STheodore Ts'o extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags); 319197a851edSJan Kara extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end); 319297a851edSJan Kara extern int ext4_put_io_end(ext4_io_end_t *io_end); 319397a851edSJan Kara extern void ext4_put_io_end_defer(ext4_io_end_t *io_end); 319497a851edSJan Kara extern void ext4_io_submit_init(struct ext4_io_submit *io, 319597a851edSJan Kara struct writeback_control *wbc); 31962e8fa54eSJan Kara extern void ext4_end_io_rsv_work(struct work_struct *work); 3197bd2d0210STheodore Ts'o extern void ext4_io_submit(struct ext4_io_submit *io); 3198bd2d0210STheodore Ts'o extern int ext4_bio_write_page(struct ext4_io_submit *io, 3199bd2d0210STheodore Ts'o struct page *page, 3200bd2d0210STheodore Ts'o int len, 32011c8349a1SNamjae Jeon struct writeback_control *wbc, 32021c8349a1SNamjae Jeon bool keep_towrite); 32033a06d778SAneesh Kumar K.V 3204c5e06d10SJohann Lombardi /* mmp.c */ 3205c5e06d10SJohann Lombardi extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t); 3206c5e06d10SJohann Lombardi 32073613d228SJan Kara /* 320848fc7f7eSAdam Buchbinder * Add new method to test whether block and inode bitmaps are properly 32092ccb5fb9SAneesh Kumar K.V * initialized. With uninit_bg reading the block from disk is not enough 32102ccb5fb9SAneesh Kumar K.V * to mark the bitmap uptodate. We need to also zero-out the bitmap 32112ccb5fb9SAneesh Kumar K.V */ 32122ccb5fb9SAneesh Kumar K.V #define BH_BITMAP_UPTODATE BH_JBDPrivateStart 32132ccb5fb9SAneesh Kumar K.V 32142ccb5fb9SAneesh Kumar K.V static inline int bitmap_uptodate(struct buffer_head *bh) 32152ccb5fb9SAneesh Kumar K.V { 32162ccb5fb9SAneesh Kumar K.V return (buffer_uptodate(bh) && 32172ccb5fb9SAneesh Kumar K.V test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state)); 32182ccb5fb9SAneesh Kumar K.V } 32192ccb5fb9SAneesh Kumar K.V static inline void set_bitmap_uptodate(struct buffer_head *bh) 32202ccb5fb9SAneesh Kumar K.V { 32212ccb5fb9SAneesh Kumar K.V set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state); 32222ccb5fb9SAneesh Kumar K.V } 32232ccb5fb9SAneesh Kumar K.V 322417335dccSDmitry Monakhov /* 322517335dccSDmitry Monakhov * Disable DIO read nolock optimization, so new dioreaders will be forced 322617335dccSDmitry Monakhov * to grab i_mutex 322717335dccSDmitry Monakhov */ 322817335dccSDmitry Monakhov static inline void ext4_inode_block_unlocked_dio(struct inode *inode) 322917335dccSDmitry Monakhov { 323017335dccSDmitry Monakhov ext4_set_inode_state(inode, EXT4_STATE_DIOREAD_LOCK); 323117335dccSDmitry Monakhov smp_mb(); 323217335dccSDmitry Monakhov } 323317335dccSDmitry Monakhov static inline void ext4_inode_resume_unlocked_dio(struct inode *inode) 323417335dccSDmitry Monakhov { 323517335dccSDmitry Monakhov smp_mb(); 323617335dccSDmitry Monakhov ext4_clear_inode_state(inode, EXT4_STATE_DIOREAD_LOCK); 323717335dccSDmitry Monakhov } 323817335dccSDmitry Monakhov 3239731eb1a0SAkinobu Mita #define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1) 3240731eb1a0SAkinobu Mita 3241e9e3bcecSEric Sandeen /* For ioend & aio unwritten conversion wait queues */ 3242e9e3bcecSEric Sandeen #define EXT4_WQ_HASH_SZ 37 3243e9e3bcecSEric Sandeen #define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\ 3244e9e3bcecSEric Sandeen EXT4_WQ_HASH_SZ]) 3245e9e3bcecSEric Sandeen extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 3246e9e3bcecSEric Sandeen 32478f82f840SYongqiang Yang extern int ext4_resize_begin(struct super_block *sb); 32488f82f840SYongqiang Yang extern void ext4_resize_end(struct super_block *sb); 32498f82f840SYongqiang Yang 325074c66bcbSJan Kara static inline void ext4_set_io_unwritten_flag(struct inode *inode, 325174c66bcbSJan Kara struct ext4_io_end *io_end) 325274c66bcbSJan Kara { 325374c66bcbSJan Kara if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) { 325474c66bcbSJan Kara io_end->flag |= EXT4_IO_END_UNWRITTEN; 325574c66bcbSJan Kara atomic_inc(&EXT4_I(inode)->i_unwritten); 325674c66bcbSJan Kara } 325774c66bcbSJan Kara } 325874c66bcbSJan Kara 325974c66bcbSJan Kara static inline void ext4_clear_io_unwritten_flag(ext4_io_end_t *io_end) 326074c66bcbSJan Kara { 326174c66bcbSJan Kara struct inode *inode = io_end->inode; 326274c66bcbSJan Kara 326374c66bcbSJan Kara if (io_end->flag & EXT4_IO_END_UNWRITTEN) { 326474c66bcbSJan Kara io_end->flag &= ~EXT4_IO_END_UNWRITTEN; 326574c66bcbSJan Kara /* Wake up anyone waiting on unwritten extent conversion */ 326674c66bcbSJan Kara if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten)) 326774c66bcbSJan Kara wake_up_all(ext4_ioend_wq(inode)); 326874c66bcbSJan Kara } 326974c66bcbSJan Kara } 327074c66bcbSJan Kara 32718ff6daa1SChristoph Hellwig extern const struct iomap_ops ext4_iomap_ops; 3272364443cbSJan Kara 32733dcf5451SChristoph Hellwig #endif /* __KERNEL__ */ 32743dcf5451SChristoph Hellwig 32756a797d27SDarrick J. Wong #define EFSBADCRC EBADMSG /* Bad CRC detected */ 32766a797d27SDarrick J. Wong #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 32776a797d27SDarrick J. Wong 32783dcf5451SChristoph Hellwig #endif /* _EXT4_H */ 3279