1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 417abc52c2SDan Magenheimer #include <linux/cleancache.h> 42ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 43ac27a0ecSDave Kleikamp 44bfff6873SLukas Czerner #include <linux/kthread.h> 45bfff6873SLukas Czerner #include <linux/freezer.h> 46bfff6873SLukas Czerner 473dcf5451SChristoph Hellwig #include "ext4.h" 484a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 493dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 50ac27a0ecSDave Kleikamp #include "xattr.h" 51ac27a0ecSDave Kleikamp #include "acl.h" 523661d286STheodore Ts'o #include "mballoc.h" 53ac27a0ecSDave Kleikamp 549bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 559bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 569bffad1eSTheodore Ts'o 571f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 583197ebdbSTheodore Ts'o static struct kset *ext4_kset; 590b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 600b75a840SLukas Czerner static struct mutex ext4_li_mtx; 610b75a840SLukas Czerner static struct ext4_features *ext4_feat; 629c191f70ST Makphaibulchoke static int ext4_mballoc_ready; 639f6200bbSTheodore Ts'o 64617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 65ac27a0ecSDave Kleikamp unsigned long journal_devnum); 662adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 67e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 68617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 69617ba13bSMingming Cao struct ext4_super_block *es); 70617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 71617ba13bSMingming Cao struct ext4_super_block *es); 72617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 73617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 74617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 75c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 76c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 77152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 78152a0836SAl Viro const char *dev_name, void *data); 792035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 802035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 81d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 82bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 83bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 848f1f7453SEric Sandeen static void ext4_clear_request_list(void); 8527dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *, ext4_fsblk_t); 86ac27a0ecSDave Kleikamp 872035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 882035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 892035e776STheodore Ts'o .owner = THIS_MODULE, 902035e776STheodore Ts'o .name = "ext2", 912035e776STheodore Ts'o .mount = ext4_mount, 922035e776STheodore Ts'o .kill_sb = kill_block_super, 932035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 942035e776STheodore Ts'o }; 957f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 96fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 972035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 982035e776STheodore Ts'o #else 992035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1002035e776STheodore Ts'o #endif 1012035e776STheodore Ts'o 1022035e776STheodore Ts'o 103ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 104ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 105ba69f9abSJan Kara .owner = THIS_MODULE, 106ba69f9abSJan Kara .name = "ext3", 107152a0836SAl Viro .mount = ext4_mount, 108ba69f9abSJan Kara .kill_sb = kill_block_super, 109ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 110ba69f9abSJan Kara }; 1117f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 112fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 113ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 114ba69f9abSJan Kara #else 115ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 116ba69f9abSJan Kara #endif 117bd81d8eeSLaurent Vivier 118d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 119d25425f8SDarrick J. Wong struct ext4_super_block *es) 120d25425f8SDarrick J. Wong { 121d25425f8SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 122d25425f8SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 123d25425f8SDarrick J. Wong return 1; 124d25425f8SDarrick J. Wong 125d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 126d25425f8SDarrick J. Wong } 127d25425f8SDarrick J. Wong 128a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 129a9c47317SDarrick J. Wong struct ext4_super_block *es) 130a9c47317SDarrick J. Wong { 131a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 132a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 133a9c47317SDarrick J. Wong __u32 csum; 134a9c47317SDarrick J. Wong 135a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 136a9c47317SDarrick J. Wong 137a9c47317SDarrick J. Wong return cpu_to_le32(csum); 138a9c47317SDarrick J. Wong } 139a9c47317SDarrick J. Wong 140c197855eSStephen Hemminger static int ext4_superblock_csum_verify(struct super_block *sb, 141a9c47317SDarrick J. Wong struct ext4_super_block *es) 142a9c47317SDarrick J. Wong { 1439aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 144a9c47317SDarrick J. Wong return 1; 145a9c47317SDarrick J. Wong 146a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 147a9c47317SDarrick J. Wong } 148a9c47317SDarrick J. Wong 14906db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 150a9c47317SDarrick J. Wong { 15106db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 15206db49e6STheodore Ts'o 1539aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 154a9c47317SDarrick J. Wong return; 155a9c47317SDarrick J. Wong 156a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 157a9c47317SDarrick J. Wong } 158a9c47317SDarrick J. Wong 1599933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1609933fc0aSTheodore Ts'o { 1619933fc0aSTheodore Ts'o void *ret; 1629933fc0aSTheodore Ts'o 1638be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1649933fc0aSTheodore Ts'o if (!ret) 1659933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1669933fc0aSTheodore Ts'o return ret; 1679933fc0aSTheodore Ts'o } 1689933fc0aSTheodore Ts'o 1699933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1709933fc0aSTheodore Ts'o { 1719933fc0aSTheodore Ts'o void *ret; 1729933fc0aSTheodore Ts'o 1738be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1749933fc0aSTheodore Ts'o if (!ret) 1759933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1769933fc0aSTheodore Ts'o return ret; 1779933fc0aSTheodore Ts'o } 1789933fc0aSTheodore Ts'o 1799933fc0aSTheodore Ts'o void ext4_kvfree(void *ptr) 1809933fc0aSTheodore Ts'o { 1819933fc0aSTheodore Ts'o if (is_vmalloc_addr(ptr)) 1829933fc0aSTheodore Ts'o vfree(ptr); 1839933fc0aSTheodore Ts'o else 1849933fc0aSTheodore Ts'o kfree(ptr); 1859933fc0aSTheodore Ts'o 1869933fc0aSTheodore Ts'o } 1879933fc0aSTheodore Ts'o 1888fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1898fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 190bd81d8eeSLaurent Vivier { 1913a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1928fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1938fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 194bd81d8eeSLaurent Vivier } 195bd81d8eeSLaurent Vivier 1968fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1978fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 198bd81d8eeSLaurent Vivier { 1995272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 2008fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2018fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 202bd81d8eeSLaurent Vivier } 203bd81d8eeSLaurent Vivier 2048fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2058fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 206bd81d8eeSLaurent Vivier { 2075272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2088fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2098fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 210bd81d8eeSLaurent Vivier } 211bd81d8eeSLaurent Vivier 212021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 213560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 214560671a0SAneesh Kumar K.V { 215560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 216560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 217560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 218560671a0SAneesh Kumar K.V } 219560671a0SAneesh Kumar K.V 220560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 221560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 222560671a0SAneesh Kumar K.V { 223560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 224560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 225560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 226560671a0SAneesh Kumar K.V } 227560671a0SAneesh Kumar K.V 228560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 229560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 230560671a0SAneesh Kumar K.V { 231560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 232560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 233560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 234560671a0SAneesh Kumar K.V } 235560671a0SAneesh Kumar K.V 236560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 237560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 238560671a0SAneesh Kumar K.V { 239560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 240560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 241560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 242560671a0SAneesh Kumar K.V } 243560671a0SAneesh Kumar K.V 2448fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2458fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 246bd81d8eeSLaurent Vivier { 2473a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2488fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2498fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 250bd81d8eeSLaurent Vivier } 251bd81d8eeSLaurent Vivier 2528fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2538fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 254bd81d8eeSLaurent Vivier { 2555272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2568fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2578fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 258bd81d8eeSLaurent Vivier } 259bd81d8eeSLaurent Vivier 2608fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2618fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 262bd81d8eeSLaurent Vivier { 2635272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2648fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2658fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 266bd81d8eeSLaurent Vivier } 267bd81d8eeSLaurent Vivier 268021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 269560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 270560671a0SAneesh Kumar K.V { 271560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 272560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 273560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 274560671a0SAneesh Kumar K.V } 275560671a0SAneesh Kumar K.V 276560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 277560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 278560671a0SAneesh Kumar K.V { 279560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 280560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 281560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 282560671a0SAneesh Kumar K.V } 283560671a0SAneesh Kumar K.V 284560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 285560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 286560671a0SAneesh Kumar K.V { 287560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 288560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 289560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 290560671a0SAneesh Kumar K.V } 291560671a0SAneesh Kumar K.V 292560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 293560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 294560671a0SAneesh Kumar K.V { 295560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 296560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 297560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 298560671a0SAneesh Kumar K.V } 299560671a0SAneesh Kumar K.V 300d3d1faf6SCurt Wohlgemuth 3011c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3021c13d5c0STheodore Ts'o unsigned int line) 3031c13d5c0STheodore Ts'o { 3041c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3051c13d5c0STheodore Ts'o 3061c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3071c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3081c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3091c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3101c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3111c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3121c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3131c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3141c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3151c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3161c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3171c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3181c13d5c0STheodore Ts'o } 31966e61a9eSTheodore Ts'o /* 32066e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 32166e61a9eSTheodore Ts'o * started already 32266e61a9eSTheodore Ts'o */ 32366e61a9eSTheodore Ts'o if (!es->s_error_count) 32466e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 325ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3261c13d5c0STheodore Ts'o } 3271c13d5c0STheodore Ts'o 3281c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3291c13d5c0STheodore Ts'o unsigned int line) 3301c13d5c0STheodore Ts'o { 3311c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3321c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3331c13d5c0STheodore Ts'o } 3341c13d5c0STheodore Ts'o 3357c2e7087STheodore Ts'o /* 3367c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 3377c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 3387c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 3397c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 3407c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 3417c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 3427c2e7087STheodore Ts'o */ 3437c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 3447c2e7087STheodore Ts'o { 3457c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 3467c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 3477c2e7087STheodore Ts'o 3487c2e7087STheodore Ts'o return bdi->dev == NULL; 3497c2e7087STheodore Ts'o } 3507c2e7087STheodore Ts'o 35118aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 35218aadd47SBobi Jam { 35318aadd47SBobi Jam struct super_block *sb = journal->j_private; 35418aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 35518aadd47SBobi Jam int error = is_journal_aborted(journal); 3565d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 35718aadd47SBobi Jam 3585d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 35918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3605d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3615d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3625d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 36318aadd47SBobi Jam list_del_init(&jce->jce_list); 36418aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 36518aadd47SBobi Jam jce->jce_func(sb, jce, error); 36618aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 36718aadd47SBobi Jam } 36818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 36918aadd47SBobi Jam } 3701c13d5c0STheodore Ts'o 371ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 372ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 373ac27a0ecSDave Kleikamp * 374ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 375617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 376ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 377ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 378ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 379ac27a0ecSDave Kleikamp * write out the superblock safely. 380ac27a0ecSDave Kleikamp * 381dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 382d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 383ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 384ac27a0ecSDave Kleikamp */ 385ac27a0ecSDave Kleikamp 386617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 387ac27a0ecSDave Kleikamp { 388ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 389ac27a0ecSDave Kleikamp return; 390ac27a0ecSDave Kleikamp 391ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 392617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 393ac27a0ecSDave Kleikamp 3944ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 395ac27a0ecSDave Kleikamp if (journal) 396dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 397ac27a0ecSDave Kleikamp } 398ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 399b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4004418e141SDmitry Monakhov /* 4014418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4024418e141SDmitry Monakhov * before ->s_flags update 4034418e141SDmitry Monakhov */ 4044418e141SDmitry Monakhov smp_wmb(); 405ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 406ac27a0ecSDave Kleikamp } 407ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 408617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 409ac27a0ecSDave Kleikamp sb->s_id); 410ac27a0ecSDave Kleikamp } 411ac27a0ecSDave Kleikamp 412efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 413efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 414efbed4dcSTheodore Ts'o "EXT4-fs error") 415efbed4dcSTheodore Ts'o 41612062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 417c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 418ac27a0ecSDave Kleikamp { 4190ff2ea7dSJoe Perches struct va_format vaf; 420ac27a0ecSDave Kleikamp va_list args; 421ac27a0ecSDave Kleikamp 422efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 423ac27a0ecSDave Kleikamp va_start(args, fmt); 4240ff2ea7dSJoe Perches vaf.fmt = fmt; 4250ff2ea7dSJoe Perches vaf.va = &args; 426efbed4dcSTheodore Ts'o printk(KERN_CRIT 427efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4280ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 429ac27a0ecSDave Kleikamp va_end(args); 430efbed4dcSTheodore Ts'o } 431f3fc0210STheodore Ts'o save_error_info(sb, function, line); 432617ba13bSMingming Cao ext4_handle_error(sb); 433ac27a0ecSDave Kleikamp } 434ac27a0ecSDave Kleikamp 435e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 436c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 437273df556SFrank Mayhar const char *fmt, ...) 438273df556SFrank Mayhar { 439273df556SFrank Mayhar va_list args; 440f7c21177STheodore Ts'o struct va_format vaf; 4411c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 442273df556SFrank Mayhar 4431c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4441c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 445efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 446273df556SFrank Mayhar va_start(args, fmt); 447f7c21177STheodore Ts'o vaf.fmt = fmt; 448f7c21177STheodore Ts'o vaf.va = &args; 449c398eda0STheodore Ts'o if (block) 450d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 451d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 452d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 453d9ee81daSJoe Perches block, current->comm, &vaf); 454d9ee81daSJoe Perches else 455d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 456d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 457d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 458d9ee81daSJoe Perches current->comm, &vaf); 459273df556SFrank Mayhar va_end(args); 460efbed4dcSTheodore Ts'o } 461efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 462273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 463273df556SFrank Mayhar } 464273df556SFrank Mayhar 465e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 466f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 467f7c21177STheodore Ts'o const char *fmt, ...) 468273df556SFrank Mayhar { 469273df556SFrank Mayhar va_list args; 470f7c21177STheodore Ts'o struct va_format vaf; 4711c13d5c0STheodore Ts'o struct ext4_super_block *es; 472496ad9aaSAl Viro struct inode *inode = file_inode(file); 473273df556SFrank Mayhar char pathname[80], *path; 474273df556SFrank Mayhar 4751c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4761c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 477efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 478273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 479f9a62d09SDan Carpenter if (IS_ERR(path)) 480273df556SFrank Mayhar path = "(unknown)"; 481f7c21177STheodore Ts'o va_start(args, fmt); 482f7c21177STheodore Ts'o vaf.fmt = fmt; 483f7c21177STheodore Ts'o vaf.va = &args; 484d9ee81daSJoe Perches if (block) 485d9ee81daSJoe Perches printk(KERN_CRIT 486d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 487d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 488d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 489d9ee81daSJoe Perches block, current->comm, path, &vaf); 490d9ee81daSJoe Perches else 491d9ee81daSJoe Perches printk(KERN_CRIT 492d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 493d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 494d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 495d9ee81daSJoe Perches current->comm, path, &vaf); 496273df556SFrank Mayhar va_end(args); 497efbed4dcSTheodore Ts'o } 498efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 499273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 500273df556SFrank Mayhar } 501273df556SFrank Mayhar 502722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 503ac27a0ecSDave Kleikamp char nbuf[16]) 504ac27a0ecSDave Kleikamp { 505ac27a0ecSDave Kleikamp char *errstr = NULL; 506ac27a0ecSDave Kleikamp 507ac27a0ecSDave Kleikamp switch (errno) { 508ac27a0ecSDave Kleikamp case -EIO: 509ac27a0ecSDave Kleikamp errstr = "IO failure"; 510ac27a0ecSDave Kleikamp break; 511ac27a0ecSDave Kleikamp case -ENOMEM: 512ac27a0ecSDave Kleikamp errstr = "Out of memory"; 513ac27a0ecSDave Kleikamp break; 514ac27a0ecSDave Kleikamp case -EROFS: 51578f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 51678f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 517ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 518ac27a0ecSDave Kleikamp else 519ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 520ac27a0ecSDave Kleikamp break; 521ac27a0ecSDave Kleikamp default: 522ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 523ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 524ac27a0ecSDave Kleikamp * NULL. */ 525ac27a0ecSDave Kleikamp if (nbuf) { 526ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 527ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 528ac27a0ecSDave Kleikamp errstr = nbuf; 529ac27a0ecSDave Kleikamp } 530ac27a0ecSDave Kleikamp break; 531ac27a0ecSDave Kleikamp } 532ac27a0ecSDave Kleikamp 533ac27a0ecSDave Kleikamp return errstr; 534ac27a0ecSDave Kleikamp } 535ac27a0ecSDave Kleikamp 536617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 537ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 538ac27a0ecSDave Kleikamp 539c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 540c398eda0STheodore Ts'o unsigned int line, int errno) 541ac27a0ecSDave Kleikamp { 542ac27a0ecSDave Kleikamp char nbuf[16]; 543ac27a0ecSDave Kleikamp const char *errstr; 544ac27a0ecSDave Kleikamp 545ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 546ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 547ac27a0ecSDave Kleikamp * an error. */ 548ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 549ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 550ac27a0ecSDave Kleikamp return; 551ac27a0ecSDave Kleikamp 552efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 553617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 554c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 555c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 556efbed4dcSTheodore Ts'o } 557ac27a0ecSDave Kleikamp 558efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 559617ba13bSMingming Cao ext4_handle_error(sb); 560ac27a0ecSDave Kleikamp } 561ac27a0ecSDave Kleikamp 562ac27a0ecSDave Kleikamp /* 563617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 564ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 565ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 566ac27a0ecSDave Kleikamp * 567ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 568ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 569ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 570ac27a0ecSDave Kleikamp */ 571ac27a0ecSDave Kleikamp 572c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 573c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 574ac27a0ecSDave Kleikamp { 575ac27a0ecSDave Kleikamp va_list args; 576ac27a0ecSDave Kleikamp 5771c13d5c0STheodore Ts'o save_error_info(sb, function, line); 578ac27a0ecSDave Kleikamp va_start(args, fmt); 579c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 580c398eda0STheodore Ts'o function, line); 581ac27a0ecSDave Kleikamp vprintk(fmt, args); 582ac27a0ecSDave Kleikamp printk("\n"); 583ac27a0ecSDave Kleikamp va_end(args); 584ac27a0ecSDave Kleikamp 5851c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 586b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 5874ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 5884418e141SDmitry Monakhov /* 5894418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 5904418e141SDmitry Monakhov * before ->s_flags update 5914418e141SDmitry Monakhov */ 5924418e141SDmitry Monakhov smp_wmb(); 5934418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 594ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 595dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5961c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5971c13d5c0STheodore Ts'o } 5981c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5991c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 600ac27a0ecSDave Kleikamp } 601ac27a0ecSDave Kleikamp 602e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 603e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 604b31e1552SEric Sandeen { 6050ff2ea7dSJoe Perches struct va_format vaf; 606b31e1552SEric Sandeen va_list args; 607b31e1552SEric Sandeen 608efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 609efbed4dcSTheodore Ts'o return; 610efbed4dcSTheodore Ts'o 611b31e1552SEric Sandeen va_start(args, fmt); 6120ff2ea7dSJoe Perches vaf.fmt = fmt; 6130ff2ea7dSJoe Perches vaf.va = &args; 6140ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 615b31e1552SEric Sandeen va_end(args); 616b31e1552SEric Sandeen } 617b31e1552SEric Sandeen 61812062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 619c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 620ac27a0ecSDave Kleikamp { 6210ff2ea7dSJoe Perches struct va_format vaf; 622ac27a0ecSDave Kleikamp va_list args; 623ac27a0ecSDave Kleikamp 624efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 625efbed4dcSTheodore Ts'o "EXT4-fs warning")) 626efbed4dcSTheodore Ts'o return; 627efbed4dcSTheodore Ts'o 628ac27a0ecSDave Kleikamp va_start(args, fmt); 6290ff2ea7dSJoe Perches vaf.fmt = fmt; 6300ff2ea7dSJoe Perches vaf.va = &args; 6310ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6320ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 633ac27a0ecSDave Kleikamp va_end(args); 634ac27a0ecSDave Kleikamp } 635ac27a0ecSDave Kleikamp 636e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 637e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 638e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 639e29136f8STheodore Ts'o const char *fmt, ...) 6405d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6415d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6425d1b1b3fSAneesh Kumar K.V { 6430ff2ea7dSJoe Perches struct va_format vaf; 6445d1b1b3fSAneesh Kumar K.V va_list args; 6455d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6465d1b1b3fSAneesh Kumar K.V 6471c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6481c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6491c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6500ff2ea7dSJoe Perches 651efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 6525d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6530ff2ea7dSJoe Perches vaf.fmt = fmt; 6540ff2ea7dSJoe Perches vaf.va = &args; 65521149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 656e29136f8STheodore Ts'o sb->s_id, function, line, grp); 657e29136f8STheodore Ts'o if (ino) 6580ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 659e29136f8STheodore Ts'o if (block) 660efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 661efbed4dcSTheodore Ts'o (unsigned long long) block); 6620ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6635d1b1b3fSAneesh Kumar K.V va_end(args); 664efbed4dcSTheodore Ts'o } 6655d1b1b3fSAneesh Kumar K.V 6665d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 667e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6685d1b1b3fSAneesh Kumar K.V return; 6695d1b1b3fSAneesh Kumar K.V } 6701c13d5c0STheodore Ts'o 6715d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6725d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6735d1b1b3fSAneesh Kumar K.V /* 6745d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6755d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6765d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6775d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6785d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 67925985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 6805d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6815d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6825d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6835d1b1b3fSAneesh Kumar K.V */ 6845d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6855d1b1b3fSAneesh Kumar K.V return; 6865d1b1b3fSAneesh Kumar K.V } 6875d1b1b3fSAneesh Kumar K.V 688617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 689ac27a0ecSDave Kleikamp { 690617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 691ac27a0ecSDave Kleikamp 692617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 693ac27a0ecSDave Kleikamp return; 694ac27a0ecSDave Kleikamp 69512062dddSEric Sandeen ext4_warning(sb, 696ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 697ac27a0ecSDave Kleikamp "running e2fsck is recommended", 698617ba13bSMingming Cao EXT4_DYNAMIC_REV); 699ac27a0ecSDave Kleikamp 700617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 701617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 702617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 703ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 704ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 705ac27a0ecSDave Kleikamp 706ac27a0ecSDave Kleikamp /* 707ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 708ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 709ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 710ac27a0ecSDave Kleikamp */ 711ac27a0ecSDave Kleikamp } 712ac27a0ecSDave Kleikamp 713ac27a0ecSDave Kleikamp /* 714ac27a0ecSDave Kleikamp * Open the external journal device 715ac27a0ecSDave Kleikamp */ 716b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 717ac27a0ecSDave Kleikamp { 718ac27a0ecSDave Kleikamp struct block_device *bdev; 719ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 720ac27a0ecSDave Kleikamp 721d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 722ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 723ac27a0ecSDave Kleikamp goto fail; 724ac27a0ecSDave Kleikamp return bdev; 725ac27a0ecSDave Kleikamp 726ac27a0ecSDave Kleikamp fail: 727b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 728ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 729ac27a0ecSDave Kleikamp return NULL; 730ac27a0ecSDave Kleikamp } 731ac27a0ecSDave Kleikamp 732ac27a0ecSDave Kleikamp /* 733ac27a0ecSDave Kleikamp * Release the journal device 734ac27a0ecSDave Kleikamp */ 7354385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 736ac27a0ecSDave Kleikamp { 7374385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 738ac27a0ecSDave Kleikamp } 739ac27a0ecSDave Kleikamp 7404385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 741ac27a0ecSDave Kleikamp { 742ac27a0ecSDave Kleikamp struct block_device *bdev; 743ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 744ac27a0ecSDave Kleikamp if (bdev) { 7454385bab1SAl Viro ext4_blkdev_put(bdev); 746ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 747ac27a0ecSDave Kleikamp } 748ac27a0ecSDave Kleikamp } 749ac27a0ecSDave Kleikamp 750ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 751ac27a0ecSDave Kleikamp { 752617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 753ac27a0ecSDave Kleikamp } 754ac27a0ecSDave Kleikamp 755617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 756ac27a0ecSDave Kleikamp { 757ac27a0ecSDave Kleikamp struct list_head *l; 758ac27a0ecSDave Kleikamp 759b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 760ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 761ac27a0ecSDave Kleikamp 762ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 763ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 764ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 765ac27a0ecSDave Kleikamp printk(KERN_ERR " " 766ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 767ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 768ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 769ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 770ac27a0ecSDave Kleikamp } 771ac27a0ecSDave Kleikamp } 772ac27a0ecSDave Kleikamp 773617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 774ac27a0ecSDave Kleikamp { 775617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 776617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 777ef2cabf7SHidehiro Kawai int i, err; 778ac27a0ecSDave Kleikamp 779857ac889SLukas Czerner ext4_unregister_li_request(sb); 780e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 781e0ccfd95SChristoph Hellwig 7822e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 7832e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 7844c0425ffSMingming Cao 7850390131bSFrank Mayhar if (sbi->s_journal) { 786ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 78747b4a50bSJan Kara sbi->s_journal = NULL; 788ef2cabf7SHidehiro Kawai if (err < 0) 789c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7900390131bSFrank Mayhar } 791d4edac31SJosef Bacik 792d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 7939105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 794d4edac31SJosef Bacik ext4_release_system_zone(sb); 795d4edac31SJosef Bacik ext4_mb_release(sb); 796d4edac31SJosef Bacik ext4_ext_release(sb); 797d4edac31SJosef Bacik ext4_xattr_put_super(sb); 798d4edac31SJosef Bacik 799ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 800617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 801ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 802ac27a0ecSDave Kleikamp } 80358c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 804a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 805a8e25a83SArtem Bityutskiy 806240799cdSTheodore Ts'o if (sbi->s_proc) { 80766acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 8089f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 809240799cdSTheodore Ts'o } 8103197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 811ac27a0ecSDave Kleikamp 812ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 813ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 814f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 8159933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 81657042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 817ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 818ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 81957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 820ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 821ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 822a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 823ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 824ac27a0ecSDave Kleikamp #endif 825ac27a0ecSDave Kleikamp 826ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 827ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 828ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 829ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 830ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 831ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 832ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 833ac27a0ecSDave Kleikamp 834f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 835ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 836ac27a0ecSDave Kleikamp /* 837ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 838ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 839ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 840ac27a0ecSDave Kleikamp */ 841ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 842f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 843617ba13bSMingming Cao ext4_blkdev_remove(sbi); 844ac27a0ecSDave Kleikamp } 8459c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 8469c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 8479c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 8489c191f70ST Makphaibulchoke } 849c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 850c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 851ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8523197ebdbSTheodore Ts'o /* 8533197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8543197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8553197ebdbSTheodore Ts'o */ 8563197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8573197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 8580441984aSDarrick J. Wong if (sbi->s_chksum_driver) 8590441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 860705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 861ac27a0ecSDave Kleikamp kfree(sbi); 862ac27a0ecSDave Kleikamp } 863ac27a0ecSDave Kleikamp 864e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 865ac27a0ecSDave Kleikamp 866ac27a0ecSDave Kleikamp /* 867ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 868ac27a0ecSDave Kleikamp */ 869617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 870ac27a0ecSDave Kleikamp { 871617ba13bSMingming Cao struct ext4_inode_info *ei; 872ac27a0ecSDave Kleikamp 873e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 874ac27a0ecSDave Kleikamp if (!ei) 875ac27a0ecSDave Kleikamp return NULL; 8760b8e58a1SAndreas Dilger 877ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 878202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 879c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 880c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8819a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 8829a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 88374cd15cdSZheng Liu INIT_LIST_HEAD(&ei->i_es_lru); 884eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 88574cd15cdSZheng Liu ei->i_es_lru_nr = 0; 886d3922a77SZheng Liu ei->i_touch_when = 0; 887d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 888d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 889d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8909d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 8917e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 892d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 893a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 894a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 895a9e7f447SDmitry Monakhov #endif 8968aefcd55STheodore Ts'o ei->jinode = NULL; 8972e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 898744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 899b436b9beSJan Kara ei->i_sync_tid = 0; 900b436b9beSJan Kara ei->i_datasync_tid = 0; 901f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 902e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9032e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 9040b8e58a1SAndreas Dilger 905ac27a0ecSDave Kleikamp return &ei->vfs_inode; 906ac27a0ecSDave Kleikamp } 907ac27a0ecSDave Kleikamp 9087ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9097ff9c073STheodore Ts'o { 9107ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9117ff9c073STheodore Ts'o 9127ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9137ff9c073STheodore Ts'o return drop; 9147ff9c073STheodore Ts'o } 9157ff9c073STheodore Ts'o 916fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 917fa0d7e3dSNick Piggin { 918fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 919fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 920fa0d7e3dSNick Piggin } 921fa0d7e3dSNick Piggin 922617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 923ac27a0ecSDave Kleikamp { 9249f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 925b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 926b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 927b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9289f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9299f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9309f7dd93dSVasily Averin true); 9319f7dd93dSVasily Averin dump_stack(); 9329f7dd93dSVasily Averin } 933fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 934ac27a0ecSDave Kleikamp } 935ac27a0ecSDave Kleikamp 93651cc5068SAlexey Dobriyan static void init_once(void *foo) 937ac27a0ecSDave Kleikamp { 938617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 939ac27a0ecSDave Kleikamp 940ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 941ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9420e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 943ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 944ac27a0ecSDave Kleikamp } 945ac27a0ecSDave Kleikamp 946e67bc2b3SFabian Frederick static int __init init_inodecache(void) 947ac27a0ecSDave Kleikamp { 948617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 949617ba13bSMingming Cao sizeof(struct ext4_inode_info), 950ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 951ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 95220c2df83SPaul Mundt init_once); 953617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 954ac27a0ecSDave Kleikamp return -ENOMEM; 955ac27a0ecSDave Kleikamp return 0; 956ac27a0ecSDave Kleikamp } 957ac27a0ecSDave Kleikamp 958ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 959ac27a0ecSDave Kleikamp { 9608c0a8537SKirill A. Shutemov /* 9618c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 9628c0a8537SKirill A. Shutemov * destroy cache. 9638c0a8537SKirill A. Shutemov */ 9648c0a8537SKirill A. Shutemov rcu_barrier(); 965617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 966ac27a0ecSDave Kleikamp } 967ac27a0ecSDave Kleikamp 9680930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 969ac27a0ecSDave Kleikamp { 9700930fcc1SAl Viro invalidate_inode_buffers(inode); 971dbd5768fSJan Kara clear_inode(inode); 9729f754758SChristoph Hellwig dquot_drop(inode); 973c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 97451865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 97574cd15cdSZheng Liu ext4_es_lru_del(inode); 9768aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9778aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9788aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9798aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9808aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9818aefcd55STheodore Ts'o } 982ac27a0ecSDave Kleikamp } 983ac27a0ecSDave Kleikamp 9841b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9851b961ac0SChristoph Hellwig u64 ino, u32 generation) 986ac27a0ecSDave Kleikamp { 987ac27a0ecSDave Kleikamp struct inode *inode; 988ac27a0ecSDave Kleikamp 989617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 990ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 991617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 992ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 993ac27a0ecSDave Kleikamp 994ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 995ac27a0ecSDave Kleikamp * 996617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 997ac27a0ecSDave Kleikamp * deleted, so we should be safe. 998ac27a0ecSDave Kleikamp * 999ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1000ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1001ac27a0ecSDave Kleikamp */ 1002f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 10031d1fe1eeSDavid Howells if (IS_ERR(inode)) 10041d1fe1eeSDavid Howells return ERR_CAST(inode); 10051d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1006ac27a0ecSDave Kleikamp iput(inode); 1007ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1008ac27a0ecSDave Kleikamp } 10091b961ac0SChristoph Hellwig 10101b961ac0SChristoph Hellwig return inode; 1011ac27a0ecSDave Kleikamp } 10121b961ac0SChristoph Hellwig 10131b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10141b961ac0SChristoph Hellwig int fh_len, int fh_type) 10151b961ac0SChristoph Hellwig { 10161b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10171b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10181b961ac0SChristoph Hellwig } 10191b961ac0SChristoph Hellwig 10201b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10211b961ac0SChristoph Hellwig int fh_len, int fh_type) 10221b961ac0SChristoph Hellwig { 10231b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10241b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1025ac27a0ecSDave Kleikamp } 1026ac27a0ecSDave Kleikamp 1027c39a7f84SToshiyuki Okajima /* 1028c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1029c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1030c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1031c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1032c39a7f84SToshiyuki Okajima */ 10330b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10340b8e58a1SAndreas Dilger gfp_t wait) 1035c39a7f84SToshiyuki Okajima { 1036c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1037c39a7f84SToshiyuki Okajima 1038c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1039c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1040c39a7f84SToshiyuki Okajima return 0; 1041c39a7f84SToshiyuki Okajima if (journal) 1042c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1043c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1044c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1045c39a7f84SToshiyuki Okajima } 1046c39a7f84SToshiyuki Okajima 1047ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1048ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1049ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1050ac27a0ecSDave Kleikamp 1051617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1052617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1053617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1054617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1055617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10566f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1057f00c9e44SJan Kara struct path *path); 10587c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 10597c319d32SAditya Kali int format_id); 1060ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 10617c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type); 1062617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1063617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1064ac27a0ecSDave Kleikamp size_t len, loff_t off); 1065617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1066ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 10677c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 10687c319d32SAditya Kali unsigned int flags); 10697c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1070ac27a0ecSDave Kleikamp 107161e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 107260e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1073617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1074617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1075617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1076617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1077a5b5ee32SJan Kara .write_info = ext4_write_info, 1078a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1079a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1080ac27a0ecSDave Kleikamp }; 1081ac27a0ecSDave Kleikamp 10820d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1083617ba13bSMingming Cao .quota_on = ext4_quota_on, 1084ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1085287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1086287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1087287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1088287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1089287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1090ac27a0ecSDave Kleikamp }; 10917c319d32SAditya Kali 10927c319d32SAditya Kali static const struct quotactl_ops ext4_qctl_sysfile_operations = { 10937c319d32SAditya Kali .quota_on_meta = ext4_quota_on_sysfile, 10947c319d32SAditya Kali .quota_off = ext4_quota_off_sysfile, 10957c319d32SAditya Kali .quota_sync = dquot_quota_sync, 10967c319d32SAditya Kali .get_info = dquot_get_dqinfo, 10977c319d32SAditya Kali .set_info = dquot_set_dqinfo, 10987c319d32SAditya Kali .get_dqblk = dquot_get_dqblk, 10997c319d32SAditya Kali .set_dqblk = dquot_set_dqblk 11007c319d32SAditya Kali }; 1101ac27a0ecSDave Kleikamp #endif 1102ac27a0ecSDave Kleikamp 1103ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1104617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1105617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1106617ba13bSMingming Cao .write_inode = ext4_write_inode, 1107617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11087ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11090930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1110617ba13bSMingming Cao .put_super = ext4_put_super, 1111617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1112c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1113c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1114617ba13bSMingming Cao .statfs = ext4_statfs, 1115617ba13bSMingming Cao .remount_fs = ext4_remount, 1116617ba13bSMingming Cao .show_options = ext4_show_options, 1117ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1118617ba13bSMingming Cao .quota_read = ext4_quota_read, 1119617ba13bSMingming Cao .quota_write = ext4_quota_write, 1120ac27a0ecSDave Kleikamp #endif 1121c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1122ac27a0ecSDave Kleikamp }; 1123ac27a0ecSDave Kleikamp 112439655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11251b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11261b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1127617ba13bSMingming Cao .get_parent = ext4_get_parent, 1128ac27a0ecSDave Kleikamp }; 1129ac27a0ecSDave Kleikamp 1130ac27a0ecSDave Kleikamp enum { 1131ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1132ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 113372578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1134ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 113572578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1136ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1137ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1138ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1139296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1140ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11415a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1142ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1143661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 11441449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 11451449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11465328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1147744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1148fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1149df981d03STheodore Ts'o Opt_max_dir_size_kb, 1150ac27a0ecSDave Kleikamp }; 1151ac27a0ecSDave Kleikamp 1152a447c093SSteven Whitehouse static const match_table_t tokens = { 1153ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1154ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1155ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1156ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1157ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1158ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1159ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1160ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1161ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1162ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1163ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1164ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1165ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1166ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 116772578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 116872578c33STheodore Ts'o {Opt_removed, "orlov"}, 1169ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1170ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1171ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1172ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1173e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11745a916be1STheodore Ts'o {Opt_noload, "noload"}, 117572578c33STheodore Ts'o {Opt_removed, "nobh"}, 117672578c33STheodore Ts'o {Opt_removed, "bh"}, 1177ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 117830773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 117930773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1180ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1181ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1182818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1183818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1184ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1185ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1186ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1187ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11885bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11895bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1190ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1191ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1192ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1193ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1194ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1195ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 11965a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1197ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1198ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1199ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1200ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1201ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 120206705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 120306705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 120425ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1205c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 120664769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1207dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 120836ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 120936ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 12106fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12116fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1212240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1213b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1214afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 121506705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 121606705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1217744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1218744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12195328e635SEric Sandeen {Opt_discard, "discard"}, 12205328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1221fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1222fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1223fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1224df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1225c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1226c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1227c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1228c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1229c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1230f3f12faaSJosef Bacik {Opt_err, NULL}, 1231ac27a0ecSDave Kleikamp }; 1232ac27a0ecSDave Kleikamp 1233617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1234ac27a0ecSDave Kleikamp { 1235617ba13bSMingming Cao ext4_fsblk_t sb_block; 1236ac27a0ecSDave Kleikamp char *options = (char *) *data; 1237ac27a0ecSDave Kleikamp 1238ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1239ac27a0ecSDave Kleikamp return 1; /* Default location */ 12400b8e58a1SAndreas Dilger 1241ac27a0ecSDave Kleikamp options += 3; 12420b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1243ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1244ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12454776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1246ac27a0ecSDave Kleikamp (char *) *data); 1247ac27a0ecSDave Kleikamp return 1; 1248ac27a0ecSDave Kleikamp } 1249ac27a0ecSDave Kleikamp if (*options == ',') 1250ac27a0ecSDave Kleikamp options++; 1251ac27a0ecSDave Kleikamp *data = (void *) options; 12520b8e58a1SAndreas Dilger 1253ac27a0ecSDave Kleikamp return sb_block; 1254ac27a0ecSDave Kleikamp } 1255ac27a0ecSDave Kleikamp 1256b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1257437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1258437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1259b3881f74STheodore Ts'o 126056c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 126156c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 126256c50f11SDmitry Monakhov { 126356c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 126456c50f11SDmitry Monakhov char *qname; 126503dafb5fSChen Gang int ret = -1; 126656c50f11SDmitry Monakhov 126756c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 126856c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 126956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127056c50f11SDmitry Monakhov "Cannot change journaled " 127156c50f11SDmitry Monakhov "quota options when quota turned on"); 127257f73c2cSTheodore Ts'o return -1; 127356c50f11SDmitry Monakhov } 1274262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1275262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1276262b4662SJan Kara "when QUOTA feature is enabled"); 1277262b4662SJan Kara return -1; 1278262b4662SJan Kara } 127956c50f11SDmitry Monakhov qname = match_strdup(args); 128056c50f11SDmitry Monakhov if (!qname) { 128156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128256c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 128357f73c2cSTheodore Ts'o return -1; 128456c50f11SDmitry Monakhov } 128503dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 128603dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 128703dafb5fSChen Gang ret = 1; 128803dafb5fSChen Gang else 128956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129003dafb5fSChen Gang "%s quota file already specified", 129103dafb5fSChen Gang QTYPE2NAME(qtype)); 129203dafb5fSChen Gang goto errout; 129356c50f11SDmitry Monakhov } 129403dafb5fSChen Gang if (strchr(qname, '/')) { 129556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129656c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 129703dafb5fSChen Gang goto errout; 129856c50f11SDmitry Monakhov } 129903dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1300fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 130156c50f11SDmitry Monakhov return 1; 130203dafb5fSChen Gang errout: 130303dafb5fSChen Gang kfree(qname); 130403dafb5fSChen Gang return ret; 130556c50f11SDmitry Monakhov } 130656c50f11SDmitry Monakhov 130756c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 130856c50f11SDmitry Monakhov { 130956c50f11SDmitry Monakhov 131056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 131156c50f11SDmitry Monakhov 131256c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 131356c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 131456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 131556c50f11SDmitry Monakhov " when quota turned on"); 131657f73c2cSTheodore Ts'o return -1; 131756c50f11SDmitry Monakhov } 131803dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 131956c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 132056c50f11SDmitry Monakhov return 1; 132156c50f11SDmitry Monakhov } 132256c50f11SDmitry Monakhov #endif 132356c50f11SDmitry Monakhov 132426092bf5STheodore Ts'o #define MOPT_SET 0x0001 132526092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 132626092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 132726092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 132826092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 132926092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 133026092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 133126092bf5STheodore Ts'o #define MOPT_Q 0 133226092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 133326092bf5STheodore Ts'o #else 133426092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 133526092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 133626092bf5STheodore Ts'o #endif 133726092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13388dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13398dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13408dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1341ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 134226092bf5STheodore Ts'o 134326092bf5STheodore Ts'o static const struct mount_opts { 134426092bf5STheodore Ts'o int token; 134526092bf5STheodore Ts'o int mount_opt; 134626092bf5STheodore Ts'o int flags; 134726092bf5STheodore Ts'o } ext4_mount_opts[] = { 134826092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 134926092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 135026092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 135126092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 135226092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 135326092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13548dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13558dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13568dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13578dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 135826092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 135926092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13608dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13618dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13628dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 136359d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 13648dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 13658dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 136626092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13678dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 13688dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13698dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 137026092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 137126092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 137226092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13738dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13748dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13758dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13768dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 137726092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 137826092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 137926092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 138026092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 138126092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 138226092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 138326092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 138426092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 138526092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 138626092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 138726092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 13880efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 13890efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 13900efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 1391ad4eec61SEric Sandeen {Opt_journal_path, 0, MOPT_STRING}, 13920efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 13938dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13948dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13958dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 13968dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 139726092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 139826092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 139926092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 140026092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 140126092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 140226092bf5STheodore Ts'o #else 140326092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 140426092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 140526092bf5STheodore Ts'o #endif 140626092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 140726092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 140826092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 140926092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 141026092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 141126092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 141226092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 141326092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 141426092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 141526092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 141626092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 141726092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 141826092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 141926092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 142026092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 142126092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1422df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 142326092bf5STheodore Ts'o {Opt_err, 0, 0} 142426092bf5STheodore Ts'o }; 142526092bf5STheodore Ts'o 142626092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 142726092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 142826092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 142926092bf5STheodore Ts'o { 143026092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 143126092bf5STheodore Ts'o const struct mount_opts *m; 143208cefc7aSEric W. Biederman kuid_t uid; 143308cefc7aSEric W. Biederman kgid_t gid; 143426092bf5STheodore Ts'o int arg = 0; 143526092bf5STheodore Ts'o 143657f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 143757f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 143857f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 143957f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 144057f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 144157f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 144257f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 144357f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 144457f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 144557f73c2cSTheodore Ts'o #endif 144626092bf5STheodore Ts'o switch (token) { 1447f7048605STheodore Ts'o case Opt_noacl: 1448f7048605STheodore Ts'o case Opt_nouser_xattr: 1449f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1450f7048605STheodore Ts'o break; 145126092bf5STheodore Ts'o case Opt_sb: 145226092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 145326092bf5STheodore Ts'o case Opt_removed: 14545f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 145526092bf5STheodore Ts'o return 1; 145626092bf5STheodore Ts'o case Opt_abort: 145726092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 145826092bf5STheodore Ts'o return 1; 145926092bf5STheodore Ts'o case Opt_i_version: 146026092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 146126092bf5STheodore Ts'o return 1; 146226092bf5STheodore Ts'o } 146326092bf5STheodore Ts'o 14645f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14655f3633e3SJan Kara if (token == m->token) 14665f3633e3SJan Kara break; 14675f3633e3SJan Kara 14685f3633e3SJan Kara if (m->token == Opt_err) { 14695f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 14705f3633e3SJan Kara "or missing value", opt); 14715f3633e3SJan Kara return -1; 14725f3633e3SJan Kara } 14735f3633e3SJan Kara 14748dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 14758dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14768dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 14778dc0aa8cSTheodore Ts'o return -1; 14788dc0aa8cSTheodore Ts'o } 14798dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 14808dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14818dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 14828dc0aa8cSTheodore Ts'o return -1; 14838dc0aa8cSTheodore Ts'o } 14848dc0aa8cSTheodore Ts'o 1485ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 14860efb3b23SJan Kara return -1; 148726092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 148826092bf5STheodore Ts'o return -1; 148926092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 149026092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 149126092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 149226092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 149326092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 149426092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 149526092bf5STheodore Ts'o "options when quota turned on"); 149626092bf5STheodore Ts'o return -1; 149726092bf5STheodore Ts'o } 149826092bf5STheodore Ts'o 149926092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 150026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 150126092bf5STheodore Ts'o } else if (token == Opt_commit) { 150226092bf5STheodore Ts'o if (arg == 0) 150326092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 150426092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 150526092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 150626092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 150726092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 150826092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 150926092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1510e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1511e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1512e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1513e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 151426092bf5STheodore Ts'o return -1; 151526092bf5STheodore Ts'o } 151626092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 151726092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 151826092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 151926092bf5STheodore Ts'o if (!args->from) 152026092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 152126092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1522df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1523df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 152426092bf5STheodore Ts'o } else if (token == Opt_stripe) { 152526092bf5STheodore Ts'o sbi->s_stripe = arg; 15260efb3b23SJan Kara } else if (token == Opt_resuid) { 15270efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15280efb3b23SJan Kara if (!uid_valid(uid)) { 15295f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15300efb3b23SJan Kara return -1; 15310efb3b23SJan Kara } 15320efb3b23SJan Kara sbi->s_resuid = uid; 15330efb3b23SJan Kara } else if (token == Opt_resgid) { 15340efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15350efb3b23SJan Kara if (!gid_valid(gid)) { 15365f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15370efb3b23SJan Kara return -1; 15380efb3b23SJan Kara } 15390efb3b23SJan Kara sbi->s_resgid = gid; 15400efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15410efb3b23SJan Kara if (is_remount) { 15420efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15430efb3b23SJan Kara "Cannot specify journal on remount"); 15440efb3b23SJan Kara return -1; 15450efb3b23SJan Kara } 15460efb3b23SJan Kara *journal_devnum = arg; 1547ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1548ad4eec61SEric Sandeen char *journal_path; 1549ad4eec61SEric Sandeen struct inode *journal_inode; 1550ad4eec61SEric Sandeen struct path path; 1551ad4eec61SEric Sandeen int error; 1552ad4eec61SEric Sandeen 1553ad4eec61SEric Sandeen if (is_remount) { 1554ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1555ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1556ad4eec61SEric Sandeen return -1; 1557ad4eec61SEric Sandeen } 1558ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1559ad4eec61SEric Sandeen if (!journal_path) { 1560ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1561ad4eec61SEric Sandeen "journal device string"); 1562ad4eec61SEric Sandeen return -1; 1563ad4eec61SEric Sandeen } 1564ad4eec61SEric Sandeen 1565ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1566ad4eec61SEric Sandeen if (error) { 1567ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1568ad4eec61SEric Sandeen "journal device path: error %d", error); 1569ad4eec61SEric Sandeen kfree(journal_path); 1570ad4eec61SEric Sandeen return -1; 1571ad4eec61SEric Sandeen } 1572ad4eec61SEric Sandeen 1573ad4eec61SEric Sandeen journal_inode = path.dentry->d_inode; 1574ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1575ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1576ad4eec61SEric Sandeen "is not a block device", journal_path); 1577ad4eec61SEric Sandeen path_put(&path); 1578ad4eec61SEric Sandeen kfree(journal_path); 1579ad4eec61SEric Sandeen return -1; 1580ad4eec61SEric Sandeen } 1581ad4eec61SEric Sandeen 1582ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1583ad4eec61SEric Sandeen path_put(&path); 1584ad4eec61SEric Sandeen kfree(journal_path); 15850efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 15860efb3b23SJan Kara if (arg > 7) { 15875f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 15880efb3b23SJan Kara " (must be 0-7)"); 15890efb3b23SJan Kara return -1; 15900efb3b23SJan Kara } 15910efb3b23SJan Kara *journal_ioprio = 15920efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 159326092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 159426092bf5STheodore Ts'o if (is_remount) { 159526092bf5STheodore Ts'o if (!sbi->s_journal) 159626092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 15975f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 159826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 159926092bf5STheodore Ts'o "Cannot change data mode on remount"); 160026092bf5STheodore Ts'o return -1; 160126092bf5STheodore Ts'o } 160226092bf5STheodore Ts'o } else { 160326092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 160426092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 160526092bf5STheodore Ts'o } 160626092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 160726092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 160826092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 160926092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16105f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16115f3633e3SJan Kara "quota options when quota turned on"); 161226092bf5STheodore Ts'o return -1; 161326092bf5STheodore Ts'o } 1614262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1615262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1616262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1617262b4662SJan Kara "Cannot set journaled quota options " 1618262b4662SJan Kara "when QUOTA feature is enabled"); 1619262b4662SJan Kara return -1; 1620262b4662SJan Kara } 162126092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 162226092bf5STheodore Ts'o #endif 162326092bf5STheodore Ts'o } else { 162426092bf5STheodore Ts'o if (!args->from) 162526092bf5STheodore Ts'o arg = 1; 162626092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 162726092bf5STheodore Ts'o arg = !arg; 162826092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 162926092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 163026092bf5STheodore Ts'o "buggy handling of option %s", opt); 163126092bf5STheodore Ts'o WARN_ON(1); 163226092bf5STheodore Ts'o return -1; 163326092bf5STheodore Ts'o } 163426092bf5STheodore Ts'o if (arg != 0) 163526092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 163626092bf5STheodore Ts'o else 163726092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 163826092bf5STheodore Ts'o } 163926092bf5STheodore Ts'o return 1; 164026092bf5STheodore Ts'o } 164126092bf5STheodore Ts'o 1642ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1643c3191067STheodore Ts'o unsigned long *journal_devnum, 1644b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1645661aa520SEric Sandeen int is_remount) 1646ac27a0ecSDave Kleikamp { 1647617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1648ac27a0ecSDave Kleikamp char *p; 1649ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 165026092bf5STheodore Ts'o int token; 1651ac27a0ecSDave Kleikamp 1652ac27a0ecSDave Kleikamp if (!options) 1653ac27a0ecSDave Kleikamp return 1; 1654ac27a0ecSDave Kleikamp 1655ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1656ac27a0ecSDave Kleikamp if (!*p) 1657ac27a0ecSDave Kleikamp continue; 165815121c18SEric Sandeen /* 165915121c18SEric Sandeen * Initialize args struct so we know whether arg was 166015121c18SEric Sandeen * found; some options take optional arguments. 166115121c18SEric Sandeen */ 1662caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1663ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 166426092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 166526092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1666ac27a0ecSDave Kleikamp return 0; 1667ac27a0ecSDave Kleikamp } 1668ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1669262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1670262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1671262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1672262b4662SJan Kara "feature is enabled"); 1673262b4662SJan Kara return 0; 1674262b4662SJan Kara } 1675ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1676482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1677fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1678ac27a0ecSDave Kleikamp 1679482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1680fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1681ac27a0ecSDave Kleikamp 168256c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1683b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1684b31e1552SEric Sandeen "format mixing"); 1685ac27a0ecSDave Kleikamp return 0; 1686ac27a0ecSDave Kleikamp } 1687ac27a0ecSDave Kleikamp 1688ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1689b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1690b31e1552SEric Sandeen "not specified"); 1691ac27a0ecSDave Kleikamp return 0; 1692ac27a0ecSDave Kleikamp } 1693ac27a0ecSDave Kleikamp } 1694ac27a0ecSDave Kleikamp #endif 1695261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1696261cb20cSJan Kara int blocksize = 1697261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1698261cb20cSJan Kara 1699261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1700261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1701261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1702261cb20cSJan Kara return 0; 1703261cb20cSJan Kara } 1704261cb20cSJan Kara } 1705ac27a0ecSDave Kleikamp return 1; 1706ac27a0ecSDave Kleikamp } 1707ac27a0ecSDave Kleikamp 17082adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17092adf6da8STheodore Ts'o struct super_block *sb) 17102adf6da8STheodore Ts'o { 17112adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17122adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17132adf6da8STheodore Ts'o 17142adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17152adf6da8STheodore Ts'o char *fmtname = ""; 17162adf6da8STheodore Ts'o 17172adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17182adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17192adf6da8STheodore Ts'o fmtname = "vfsold"; 17202adf6da8STheodore Ts'o break; 17212adf6da8STheodore Ts'o case QFMT_VFS_V0: 17222adf6da8STheodore Ts'o fmtname = "vfsv0"; 17232adf6da8STheodore Ts'o break; 17242adf6da8STheodore Ts'o case QFMT_VFS_V1: 17252adf6da8STheodore Ts'o fmtname = "vfsv1"; 17262adf6da8STheodore Ts'o break; 17272adf6da8STheodore Ts'o } 17282adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17292adf6da8STheodore Ts'o } 17302adf6da8STheodore Ts'o 17312adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17322adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17332adf6da8STheodore Ts'o 17342adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17352adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17362adf6da8STheodore Ts'o #endif 17372adf6da8STheodore Ts'o } 17382adf6da8STheodore Ts'o 17395a916be1STheodore Ts'o static const char *token2str(int token) 17405a916be1STheodore Ts'o { 174150df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17425a916be1STheodore Ts'o 17435a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17445a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17455a916be1STheodore Ts'o break; 17465a916be1STheodore Ts'o return t->pattern; 17475a916be1STheodore Ts'o } 17485a916be1STheodore Ts'o 17492adf6da8STheodore Ts'o /* 17502adf6da8STheodore Ts'o * Show an option if 17512adf6da8STheodore Ts'o * - it's set to a non-default value OR 17522adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17532adf6da8STheodore Ts'o */ 175466acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 175566acdcf4STheodore Ts'o int nodefs) 17562adf6da8STheodore Ts'o { 17572adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17582adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 175966acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17605a916be1STheodore Ts'o const struct mount_opts *m; 176166acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17622adf6da8STheodore Ts'o 176366acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 176466acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17652adf6da8STheodore Ts'o 17662adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17675a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17685a916be1STheodore Ts'o 17695a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17705a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17715a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17725a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17735a916be1STheodore Ts'o continue; 177466acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17755a916be1STheodore Ts'o continue; /* skip if same as the default */ 17765a916be1STheodore Ts'o if ((want_set && 17775a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17785a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17795a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17805a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17815a916be1STheodore Ts'o } 17825a916be1STheodore Ts'o 178308cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17845a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 178508cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 178608cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 178708cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 17885a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 178908cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 179008cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 179166acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 17925a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 17935a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 17942adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 17955a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 17962adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 17975a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 179866acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 17995a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 180066acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18015a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 180266acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18035a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18042adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18055a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 180666acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18075a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 180866acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18092adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18105a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18112adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18125a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18132adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18145a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18155a916be1STheodore Ts'o } 181666acdcf4STheodore Ts'o if (nodefs || 181766acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18185a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18192adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18202adf6da8STheodore Ts'o 182166acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 182266acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18235a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1824df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1825df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18262adf6da8STheodore Ts'o 18272adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18282adf6da8STheodore Ts'o return 0; 18292adf6da8STheodore Ts'o } 18302adf6da8STheodore Ts'o 183166acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 183266acdcf4STheodore Ts'o { 183366acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 183466acdcf4STheodore Ts'o } 183566acdcf4STheodore Ts'o 183666acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 183766acdcf4STheodore Ts'o { 183866acdcf4STheodore Ts'o struct super_block *sb = seq->private; 183966acdcf4STheodore Ts'o int rc; 184066acdcf4STheodore Ts'o 184166acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 184266acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 184366acdcf4STheodore Ts'o seq_puts(seq, "\n"); 184466acdcf4STheodore Ts'o return rc; 184566acdcf4STheodore Ts'o } 184666acdcf4STheodore Ts'o 184766acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 184866acdcf4STheodore Ts'o { 1849d9dda78bSAl Viro return single_open(file, options_seq_show, PDE_DATA(inode)); 185066acdcf4STheodore Ts'o } 185166acdcf4STheodore Ts'o 185266acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 185366acdcf4STheodore Ts'o .owner = THIS_MODULE, 185466acdcf4STheodore Ts'o .open = options_open_fs, 185566acdcf4STheodore Ts'o .read = seq_read, 185666acdcf4STheodore Ts'o .llseek = seq_lseek, 185766acdcf4STheodore Ts'o .release = single_release, 185866acdcf4STheodore Ts'o }; 185966acdcf4STheodore Ts'o 1860617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1861ac27a0ecSDave Kleikamp int read_only) 1862ac27a0ecSDave Kleikamp { 1863617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1864ac27a0ecSDave Kleikamp int res = 0; 1865ac27a0ecSDave Kleikamp 1866617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1867b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1868b31e1552SEric Sandeen "forcing read-only mode"); 1869ac27a0ecSDave Kleikamp res = MS_RDONLY; 1870ac27a0ecSDave Kleikamp } 1871ac27a0ecSDave Kleikamp if (read_only) 1872281b5995STheodore Ts'o goto done; 1873617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1874b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1875b31e1552SEric Sandeen "running e2fsck is recommended"); 1876c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 1877b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1878b31e1552SEric Sandeen "warning: mounting fs with errors, " 1879b31e1552SEric Sandeen "running e2fsck is recommended"); 1880ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1881ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1882ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1883b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1884b31e1552SEric Sandeen "warning: maximal mount count reached, " 1885b31e1552SEric Sandeen "running e2fsck is recommended"); 1886ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1887ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1888ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1889b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1890b31e1552SEric Sandeen "warning: checktime reached, " 1891b31e1552SEric Sandeen "running e2fsck is recommended"); 18920390131bSFrank Mayhar if (!sbi->s_journal) 1893216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1894ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1895617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1896e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1897ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1898617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 18990390131bSFrank Mayhar if (sbi->s_journal) 1900617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1901ac27a0ecSDave Kleikamp 1902e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1903281b5995STheodore Ts'o done: 1904ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1905a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1906a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1907ac27a0ecSDave Kleikamp sb->s_blocksize, 1908ac27a0ecSDave Kleikamp sbi->s_groups_count, 1909617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1910617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1911a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1912ac27a0ecSDave Kleikamp 19137abc52c2SDan Magenheimer cleancache_init_fs(sb); 1914ac27a0ecSDave Kleikamp return res; 1915ac27a0ecSDave Kleikamp } 1916ac27a0ecSDave Kleikamp 1917117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1918117fff10STheodore Ts'o { 1919117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1920117fff10STheodore Ts'o struct flex_groups *new_groups; 1921117fff10STheodore Ts'o int size; 1922117fff10STheodore Ts'o 1923117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1924117fff10STheodore Ts'o return 0; 1925117fff10STheodore Ts'o 1926117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1927117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1928117fff10STheodore Ts'o return 0; 1929117fff10STheodore Ts'o 1930117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1931117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1932117fff10STheodore Ts'o if (!new_groups) { 1933117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1934117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1935117fff10STheodore Ts'o return -ENOMEM; 1936117fff10STheodore Ts'o } 1937117fff10STheodore Ts'o 1938117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1939117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1940117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1941117fff10STheodore Ts'o sizeof(struct flex_groups))); 1942117fff10STheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 1943117fff10STheodore Ts'o } 1944117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1945117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1946117fff10STheodore Ts'o return 0; 1947117fff10STheodore Ts'o } 1948117fff10STheodore Ts'o 1949772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1950772cb7c8SJose R. Santos { 1951772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1952772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1953772cb7c8SJose R. Santos ext4_group_t flex_group; 1954117fff10STheodore Ts'o int i, err; 1955772cb7c8SJose R. Santos 1956503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1957d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1958772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1959772cb7c8SJose R. Santos return 1; 1960772cb7c8SJose R. Santos } 1961772cb7c8SJose R. Santos 1962117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1963117fff10STheodore Ts'o if (err) 1964772cb7c8SJose R. Santos goto failed; 1965772cb7c8SJose R. Santos 1966772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 196788b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1968772cb7c8SJose R. Santos 1969772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19707ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19717ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 197290ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 197324aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19747ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19757ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1976772cb7c8SJose R. Santos } 1977772cb7c8SJose R. Santos 1978772cb7c8SJose R. Santos return 1; 1979772cb7c8SJose R. Santos failed: 1980772cb7c8SJose R. Santos return 0; 1981772cb7c8SJose R. Santos } 1982772cb7c8SJose R. Santos 1983feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1984717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1985717d50e4SAndreas Dilger { 1986feb0ab32SDarrick J. Wong int offset; 1987717d50e4SAndreas Dilger __u16 crc = 0; 1988717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1989717d50e4SAndreas Dilger 19909aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 1991feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1992d6a77105STheodore Ts'o __le16 save_csum; 1993feb0ab32SDarrick J. Wong __u32 csum32; 1994feb0ab32SDarrick J. Wong 1995d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 1996feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 1997feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 1998feb0ab32SDarrick J. Wong sizeof(le_group)); 1999feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2000feb0ab32SDarrick J. Wong sbi->s_desc_size); 2001d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 2002feb0ab32SDarrick J. Wong 2003feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2004feb0ab32SDarrick J. Wong goto out; 2005feb0ab32SDarrick J. Wong } 2006feb0ab32SDarrick J. Wong 2007feb0ab32SDarrick J. Wong /* old crc16 code */ 2008813d32f9SDarrick J. Wong if (!(sbi->s_es->s_feature_ro_compat & 2009813d32f9SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM))) 2010813d32f9SDarrick J. Wong return 0; 2011813d32f9SDarrick J. Wong 2012feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2013feb0ab32SDarrick J. Wong 2014717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2015717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2016717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2017717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2018717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2019717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2020717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2021717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2022717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2023717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2024717d50e4SAndreas Dilger offset); 2025717d50e4SAndreas Dilger 2026feb0ab32SDarrick J. Wong out: 2027717d50e4SAndreas Dilger return cpu_to_le16(crc); 2028717d50e4SAndreas Dilger } 2029717d50e4SAndreas Dilger 2030feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2031717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2032717d50e4SAndreas Dilger { 2033feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2034feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2035feb0ab32SDarrick J. Wong block_group, gdp))) 2036717d50e4SAndreas Dilger return 0; 2037717d50e4SAndreas Dilger 2038717d50e4SAndreas Dilger return 1; 2039717d50e4SAndreas Dilger } 2040717d50e4SAndreas Dilger 2041feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2042feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2043feb0ab32SDarrick J. Wong { 2044feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2045feb0ab32SDarrick J. Wong return; 2046feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2047feb0ab32SDarrick J. Wong } 2048feb0ab32SDarrick J. Wong 2049ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2050bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2051bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2052ac27a0ecSDave Kleikamp { 2053617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2054617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2055617ba13bSMingming Cao ext4_fsblk_t last_block; 2056bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2057bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2058bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2059ce421581SJose R. Santos int flexbg_flag = 0; 2060bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2061ac27a0ecSDave Kleikamp 2062ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2063ce421581SJose R. Santos flexbg_flag = 1; 2064ce421581SJose R. Santos 2065617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2066ac27a0ecSDave Kleikamp 2067197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2068197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2069197cd65aSAkinobu Mita 2070ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2071bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2072ac27a0ecSDave Kleikamp else 2073ac27a0ecSDave Kleikamp last_block = first_block + 2074617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2075ac27a0ecSDave Kleikamp 2076bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2077bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2078bfff6873SLukas Czerner grp = i; 2079bfff6873SLukas Czerner 20808fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20812b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2082b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2083a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2084b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2085ac27a0ecSDave Kleikamp return 0; 2086ac27a0ecSDave Kleikamp } 20878fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20882b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2089b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2090a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2091b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2092ac27a0ecSDave Kleikamp return 0; 2093ac27a0ecSDave Kleikamp } 20948fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2095bd81d8eeSLaurent Vivier if (inode_table < first_block || 20962b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2097b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2098a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2099b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2100ac27a0ecSDave Kleikamp return 0; 2101ac27a0ecSDave Kleikamp } 2102955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2103feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2104b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2105b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2106fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2107fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21087ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2109955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2110717d50e4SAndreas Dilger return 0; 2111717d50e4SAndreas Dilger } 21127ee1ec4cSLi Zefan } 2113955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2114ce421581SJose R. Santos if (!flexbg_flag) 2115617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2116ac27a0ecSDave Kleikamp } 2117bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2118bfff6873SLukas Czerner *first_not_zeroed = grp; 2119ac27a0ecSDave Kleikamp return 1; 2120ac27a0ecSDave Kleikamp } 2121ac27a0ecSDave Kleikamp 2122617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2123ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2124ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2125ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2126ac27a0ecSDave Kleikamp * 2127ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2128ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2129ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2130ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2131ac27a0ecSDave Kleikamp * 2132ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2133ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2134ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2135617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2136ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2137ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2138ac27a0ecSDave Kleikamp */ 2139617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2140617ba13bSMingming Cao struct ext4_super_block *es) 2141ac27a0ecSDave Kleikamp { 2142ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2143ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2144ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2145ac27a0ecSDave Kleikamp int i; 2146ac27a0ecSDave Kleikamp #endif 2147ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2148ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2149ac27a0ecSDave Kleikamp return; 2150ac27a0ecSDave Kleikamp } 2151ac27a0ecSDave Kleikamp 2152a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2153b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2154b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2155a8f48a95SEric Sandeen return; 2156a8f48a95SEric Sandeen } 2157a8f48a95SEric Sandeen 2158d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2159d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2160d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2161d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2162d39195c3SAmir Goldstein return; 2163d39195c3SAmir Goldstein } 2164d39195c3SAmir Goldstein 2165617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2166c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2167c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 216884474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2169ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2170ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2171c25f9bc6SEric Sandeen } 2172ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2173ac27a0ecSDave Kleikamp return; 2174ac27a0ecSDave Kleikamp } 2175ac27a0ecSDave Kleikamp 2176ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2177b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2178ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2179ac27a0ecSDave Kleikamp } 2180ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2181ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2182ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2183ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2184a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2185617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2186617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2187ac27a0ecSDave Kleikamp if (ret < 0) 2188b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2189b31e1552SEric Sandeen "Cannot turn on journaled " 2190b31e1552SEric Sandeen "quota: error %d", ret); 2191ac27a0ecSDave Kleikamp } 2192ac27a0ecSDave Kleikamp } 2193ac27a0ecSDave Kleikamp #endif 2194ac27a0ecSDave Kleikamp 2195ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2196ac27a0ecSDave Kleikamp struct inode *inode; 2197ac27a0ecSDave Kleikamp 219897bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 219997bd42b9SJosef Bacik if (IS_ERR(inode)) { 2200ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2201ac27a0ecSDave Kleikamp break; 2202ac27a0ecSDave Kleikamp } 2203ac27a0ecSDave Kleikamp 2204617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2205871a2931SChristoph Hellwig dquot_initialize(inode); 2206ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2207566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2208b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2209b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 221046e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2211e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2212ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2213721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 221455f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2215617ba13bSMingming Cao ext4_truncate(inode); 2216721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2217ac27a0ecSDave Kleikamp nr_truncates++; 2218ac27a0ecSDave Kleikamp } else { 2219566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2220b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2221b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 222246e665e9SHarvey Harrison __func__, inode->i_ino); 2223ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2224ac27a0ecSDave Kleikamp inode->i_ino); 2225ac27a0ecSDave Kleikamp nr_orphans++; 2226ac27a0ecSDave Kleikamp } 2227ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2228ac27a0ecSDave Kleikamp } 2229ac27a0ecSDave Kleikamp 2230ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2231ac27a0ecSDave Kleikamp 2232ac27a0ecSDave Kleikamp if (nr_orphans) 2233b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2234b31e1552SEric Sandeen PLURAL(nr_orphans)); 2235ac27a0ecSDave Kleikamp if (nr_truncates) 2236b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2237b31e1552SEric Sandeen PLURAL(nr_truncates)); 2238ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2239ac27a0ecSDave Kleikamp /* Turn quotas off */ 2240a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2241ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2242287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2243ac27a0ecSDave Kleikamp } 2244ac27a0ecSDave Kleikamp #endif 2245ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2246ac27a0ecSDave Kleikamp } 22470b8e58a1SAndreas Dilger 2248cd2291a4SEric Sandeen /* 2249cd2291a4SEric Sandeen * Maximal extent format file size. 2250cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2251cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2252cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2253cd2291a4SEric Sandeen * so that won't be a limiting factor. 2254cd2291a4SEric Sandeen * 2255f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2256f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2257f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2258f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2259f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2260f17722f9SLukas Czerner * 2261cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2262cd2291a4SEric Sandeen */ 2263f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2264cd2291a4SEric Sandeen { 2265cd2291a4SEric Sandeen loff_t res; 2266cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2267cd2291a4SEric Sandeen 2268cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2269f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2270cd2291a4SEric Sandeen /* 227190c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2272cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2273cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2274cd2291a4SEric Sandeen */ 2275cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2276cd2291a4SEric Sandeen 2277cd2291a4SEric Sandeen /* total blocks in file system block size */ 2278cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2279cd2291a4SEric Sandeen upper_limit <<= blkbits; 2280cd2291a4SEric Sandeen } 2281cd2291a4SEric Sandeen 2282f17722f9SLukas Czerner /* 2283f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2284f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2285f17722f9SLukas Czerner * size 2286f17722f9SLukas Czerner */ 2287f17722f9SLukas Czerner res = (1LL << 32) - 1; 2288cd2291a4SEric Sandeen res <<= blkbits; 2289cd2291a4SEric Sandeen 2290cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2291cd2291a4SEric Sandeen if (res > upper_limit) 2292cd2291a4SEric Sandeen res = upper_limit; 2293cd2291a4SEric Sandeen 2294cd2291a4SEric Sandeen return res; 2295cd2291a4SEric Sandeen } 2296ac27a0ecSDave Kleikamp 2297ac27a0ecSDave Kleikamp /* 2298cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22990fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23000fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2301ac27a0ecSDave Kleikamp */ 2302f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2303ac27a0ecSDave Kleikamp { 2304617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23050fc1b451SAneesh Kumar K.V int meta_blocks; 23060fc1b451SAneesh Kumar K.V loff_t upper_limit; 23070b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23080b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23090b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23100b8e58a1SAndreas Dilger * 23110b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23120b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23130fc1b451SAneesh Kumar K.V */ 23140fc1b451SAneesh Kumar K.V 2315f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23160fc1b451SAneesh Kumar K.V /* 231790c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23180b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23190b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23200fc1b451SAneesh Kumar K.V */ 23210fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23220fc1b451SAneesh Kumar K.V 23230fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23240fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23250fc1b451SAneesh Kumar K.V 23260fc1b451SAneesh Kumar K.V } else { 23278180a562SAneesh Kumar K.V /* 23288180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23298180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23308180a562SAneesh Kumar K.V * represent total number of blocks in 23318180a562SAneesh Kumar K.V * file system block size 23328180a562SAneesh Kumar K.V */ 23330fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23340fc1b451SAneesh Kumar K.V 23350fc1b451SAneesh Kumar K.V } 23360fc1b451SAneesh Kumar K.V 23370fc1b451SAneesh Kumar K.V /* indirect blocks */ 23380fc1b451SAneesh Kumar K.V meta_blocks = 1; 23390fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23400fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23410fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23420fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23430fc1b451SAneesh Kumar K.V 23440fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23450fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2346ac27a0ecSDave Kleikamp 2347ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2348ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2349ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2350ac27a0ecSDave Kleikamp res <<= bits; 2351ac27a0ecSDave Kleikamp if (res > upper_limit) 2352ac27a0ecSDave Kleikamp res = upper_limit; 23530fc1b451SAneesh Kumar K.V 23540fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23550fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23560fc1b451SAneesh Kumar K.V 2357ac27a0ecSDave Kleikamp return res; 2358ac27a0ecSDave Kleikamp } 2359ac27a0ecSDave Kleikamp 2360617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 236170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2362ac27a0ecSDave Kleikamp { 2363617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2364fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2365ac27a0ecSDave Kleikamp int has_super = 0; 2366ac27a0ecSDave Kleikamp 2367ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2368ac27a0ecSDave Kleikamp 2369617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2370ac27a0ecSDave Kleikamp nr < first_meta_bg) 237170bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2372ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2373617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2374ac27a0ecSDave Kleikamp has_super = 1; 23750b8e58a1SAndreas Dilger 2376bd63f6b0SDarrick J. Wong /* 2377bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2378bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2379bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2380bd63f6b0SDarrick J. Wong * compensate. 2381bd63f6b0SDarrick J. Wong */ 2382bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2383bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2384bd63f6b0SDarrick J. Wong has_super++; 2385bd63f6b0SDarrick J. Wong 2386617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2387ac27a0ecSDave Kleikamp } 2388ac27a0ecSDave Kleikamp 2389c9de560dSAlex Tomas /** 2390c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2391c9de560dSAlex Tomas * @sbi: In memory super block info 2392c9de560dSAlex Tomas * 2393c9de560dSAlex Tomas * If we have specified it via mount option, then 2394c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2395c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2396c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2397c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2398c9de560dSAlex Tomas * 2399c9de560dSAlex Tomas */ 2400c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2401c9de560dSAlex Tomas { 2402c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2403c9de560dSAlex Tomas unsigned long stripe_width = 2404c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24053eb08658SDan Ehrenberg int ret; 2406c9de560dSAlex Tomas 2407c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24083eb08658SDan Ehrenberg ret = sbi->s_stripe; 24093eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24103eb08658SDan Ehrenberg ret = stripe_width; 24113eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24123eb08658SDan Ehrenberg ret = stride; 24133eb08658SDan Ehrenberg else 24143eb08658SDan Ehrenberg ret = 0; 2415c9de560dSAlex Tomas 24163eb08658SDan Ehrenberg /* 24173eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24183eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24193eb08658SDan Ehrenberg */ 24203eb08658SDan Ehrenberg if (ret <= 1) 24213eb08658SDan Ehrenberg ret = 0; 2422c9de560dSAlex Tomas 24233eb08658SDan Ehrenberg return ret; 2424c9de560dSAlex Tomas } 2425ac27a0ecSDave Kleikamp 24263197ebdbSTheodore Ts'o /* sysfs supprt */ 24273197ebdbSTheodore Ts'o 24283197ebdbSTheodore Ts'o struct ext4_attr { 24293197ebdbSTheodore Ts'o struct attribute attr; 24303197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24313197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24323197ebdbSTheodore Ts'o const char *, size_t); 2433f2d50a65SJan Kara union { 24343197ebdbSTheodore Ts'o int offset; 2435f2d50a65SJan Kara int deprecated_val; 2436f2d50a65SJan Kara } u; 24373197ebdbSTheodore Ts'o }; 24383197ebdbSTheodore Ts'o 243927dd4385SLukas Czerner static int parse_strtoull(const char *buf, 244027dd4385SLukas Czerner unsigned long long max, unsigned long long *value) 244127dd4385SLukas Czerner { 244227dd4385SLukas Czerner int ret; 244327dd4385SLukas Czerner 244427dd4385SLukas Czerner ret = kstrtoull(skip_spaces(buf), 0, value); 244527dd4385SLukas Czerner if (!ret && *value > max) 244627dd4385SLukas Czerner ret = -EINVAL; 244727dd4385SLukas Czerner return ret; 244827dd4385SLukas Czerner } 244927dd4385SLukas Czerner 24503197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24513197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24523197ebdbSTheodore Ts'o char *buf) 24533197ebdbSTheodore Ts'o { 24543197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24557b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24567b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24573197ebdbSTheodore Ts'o } 24583197ebdbSTheodore Ts'o 24593197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24603197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24613197ebdbSTheodore Ts'o { 24623197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24633197ebdbSTheodore Ts'o 2464f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2465f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24663197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24673197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24683197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24693197ebdbSTheodore Ts'o } 24703197ebdbSTheodore Ts'o 24713197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24723197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24733197ebdbSTheodore Ts'o { 24743197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24753197ebdbSTheodore Ts'o 2476f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2477f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24783197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2479a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24803197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2481a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24823197ebdbSTheodore Ts'o } 24833197ebdbSTheodore Ts'o 24843197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24853197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24863197ebdbSTheodore Ts'o const char *buf, size_t count) 24873197ebdbSTheodore Ts'o { 24883197ebdbSTheodore Ts'o unsigned long t; 2489e1091b15SLukas Czerner int ret; 24903197ebdbSTheodore Ts'o 2491e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2492e1091b15SLukas Czerner if (ret) 2493e1091b15SLukas Czerner return ret; 24943197ebdbSTheodore Ts'o 2495e1091b15SLukas Czerner if (t && (!is_power_of_2(t) || t > 0x40000000)) 24963197ebdbSTheodore Ts'o return -EINVAL; 24973197ebdbSTheodore Ts'o 24983197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24993197ebdbSTheodore Ts'o return count; 25003197ebdbSTheodore Ts'o } 25013197ebdbSTheodore Ts'o 25023197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25033197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25043197ebdbSTheodore Ts'o { 2505f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25063197ebdbSTheodore Ts'o 25073197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25083197ebdbSTheodore Ts'o } 25093197ebdbSTheodore Ts'o 25103197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25113197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25123197ebdbSTheodore Ts'o const char *buf, size_t count) 25133197ebdbSTheodore Ts'o { 2514f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25153197ebdbSTheodore Ts'o unsigned long t; 2516e1091b15SLukas Czerner int ret; 25173197ebdbSTheodore Ts'o 2518e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2519e1091b15SLukas Czerner if (ret) 2520e1091b15SLukas Czerner return ret; 25213197ebdbSTheodore Ts'o *ui = t; 25223197ebdbSTheodore Ts'o return count; 25233197ebdbSTheodore Ts'o } 25243197ebdbSTheodore Ts'o 252552c198c6SLukas Czerner static ssize_t es_ui_show(struct ext4_attr *a, 252652c198c6SLukas Czerner struct ext4_sb_info *sbi, char *buf) 252752c198c6SLukas Czerner { 252852c198c6SLukas Czerner 252952c198c6SLukas Czerner unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) + 253052c198c6SLukas Czerner a->u.offset); 253152c198c6SLukas Czerner 253252c198c6SLukas Czerner return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 253352c198c6SLukas Czerner } 253452c198c6SLukas Czerner 253527dd4385SLukas Czerner static ssize_t reserved_clusters_show(struct ext4_attr *a, 253627dd4385SLukas Czerner struct ext4_sb_info *sbi, char *buf) 253727dd4385SLukas Czerner { 253827dd4385SLukas Czerner return snprintf(buf, PAGE_SIZE, "%llu\n", 253927dd4385SLukas Czerner (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); 254027dd4385SLukas Czerner } 254127dd4385SLukas Czerner 254227dd4385SLukas Czerner static ssize_t reserved_clusters_store(struct ext4_attr *a, 254327dd4385SLukas Czerner struct ext4_sb_info *sbi, 254427dd4385SLukas Czerner const char *buf, size_t count) 254527dd4385SLukas Czerner { 254627dd4385SLukas Czerner unsigned long long val; 254727dd4385SLukas Czerner int ret; 254827dd4385SLukas Czerner 254927dd4385SLukas Czerner if (parse_strtoull(buf, -1ULL, &val)) 255027dd4385SLukas Czerner return -EINVAL; 255127dd4385SLukas Czerner ret = ext4_reserve_clusters(sbi, val); 255227dd4385SLukas Czerner 255327dd4385SLukas Czerner return ret ? ret : count; 255427dd4385SLukas Czerner } 255527dd4385SLukas Czerner 25562c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25572c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25582c0544b2STheodore Ts'o const char *buf, size_t count) 25592c0544b2STheodore Ts'o { 25602c0544b2STheodore Ts'o int len = count; 25612c0544b2STheodore Ts'o 25622c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25632c0544b2STheodore Ts'o return -EPERM; 25642c0544b2STheodore Ts'o 25652c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25662c0544b2STheodore Ts'o len--; 25672c0544b2STheodore Ts'o 25682c0544b2STheodore Ts'o if (len) 25692c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25702c0544b2STheodore Ts'o return count; 25712c0544b2STheodore Ts'o } 25722c0544b2STheodore Ts'o 2573f2d50a65SJan Kara static ssize_t sbi_deprecated_show(struct ext4_attr *a, 2574f2d50a65SJan Kara struct ext4_sb_info *sbi, char *buf) 2575f2d50a65SJan Kara { 2576f2d50a65SJan Kara return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); 2577f2d50a65SJan Kara } 2578f2d50a65SJan Kara 25793197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25803197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25813197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25823197ebdbSTheodore Ts'o .show = _show, \ 25833197ebdbSTheodore Ts'o .store = _store, \ 2584f2d50a65SJan Kara .u = { \ 25853197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname),\ 2586f2d50a65SJan Kara }, \ 25873197ebdbSTheodore Ts'o } 258852c198c6SLukas Czerner 258952c198c6SLukas Czerner #define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \ 259052c198c6SLukas Czerner static struct ext4_attr ext4_attr_##_name = { \ 259152c198c6SLukas Czerner .attr = {.name = __stringify(_name), .mode = _mode }, \ 259252c198c6SLukas Czerner .show = _show, \ 259352c198c6SLukas Czerner .store = _store, \ 259452c198c6SLukas Czerner .u = { \ 259552c198c6SLukas Czerner .offset = offsetof(struct ext4_super_block, _elname), \ 259652c198c6SLukas Czerner }, \ 259752c198c6SLukas Czerner } 259852c198c6SLukas Czerner 25993197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 26003197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 26013197ebdbSTheodore Ts'o 2602857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 26033197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 26043197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 260552c198c6SLukas Czerner 260652c198c6SLukas Czerner #define EXT4_RO_ATTR_ES_UI(name, elname) \ 260752c198c6SLukas Czerner EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname) 26083197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 26093197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 261052c198c6SLukas Czerner 26113197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 2612f2d50a65SJan Kara #define EXT4_DEPRECATED_ATTR(_name, _val) \ 2613f2d50a65SJan Kara static struct ext4_attr ext4_attr_##_name = { \ 2614f2d50a65SJan Kara .attr = {.name = __stringify(_name), .mode = 0444 }, \ 2615f2d50a65SJan Kara .show = sbi_deprecated_show, \ 2616f2d50a65SJan Kara .u = { \ 2617f2d50a65SJan Kara .deprecated_val = _val, \ 2618f2d50a65SJan Kara }, \ 2619f2d50a65SJan Kara } 26203197ebdbSTheodore Ts'o 26213197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 26223197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 26233197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 262427dd4385SLukas Czerner EXT4_RW_ATTR(reserved_clusters); 26253197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 26263197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 262711013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 26283197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 26293197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 26303197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 26313197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26323197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26333197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 2634f2d50a65SJan Kara EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); 263567a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 26362c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 2637efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 2638efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 2639efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 2640efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 2641efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 2642efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 264352c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 264452c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); 264552c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); 26463197ebdbSTheodore Ts'o 26473197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26483197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26493197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26503197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 265127dd4385SLukas Czerner ATTR_LIST(reserved_clusters), 26523197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 265311013911SAndreas Dilger ATTR_LIST(inode_goal), 26543197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26553197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26563197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26573197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26583197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26593197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 266055138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 266167a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 26622c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 2663efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 2664efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_burst), 2665efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 2666efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 2667efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 2668efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 266952c198c6SLukas Czerner ATTR_LIST(errors_count), 267052c198c6SLukas Czerner ATTR_LIST(first_error_time), 267152c198c6SLukas Czerner ATTR_LIST(last_error_time), 26723197ebdbSTheodore Ts'o NULL, 26733197ebdbSTheodore Ts'o }; 26743197ebdbSTheodore Ts'o 2675857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2676857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 267727ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 26785e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2679857ac889SLukas Czerner 2680857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2681857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 268227ee40dfSLukas Czerner ATTR_LIST(batched_discard), 26835e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2684857ac889SLukas Czerner NULL, 2685857ac889SLukas Czerner }; 2686857ac889SLukas Czerner 26873197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 26883197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 26893197ebdbSTheodore Ts'o { 26903197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26913197ebdbSTheodore Ts'o s_kobj); 26923197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26933197ebdbSTheodore Ts'o 26943197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 26953197ebdbSTheodore Ts'o } 26963197ebdbSTheodore Ts'o 26973197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 26983197ebdbSTheodore Ts'o struct attribute *attr, 26993197ebdbSTheodore Ts'o const char *buf, size_t len) 27003197ebdbSTheodore Ts'o { 27013197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27023197ebdbSTheodore Ts'o s_kobj); 27033197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27043197ebdbSTheodore Ts'o 27053197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 27063197ebdbSTheodore Ts'o } 27073197ebdbSTheodore Ts'o 27083197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 27093197ebdbSTheodore Ts'o { 27103197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27113197ebdbSTheodore Ts'o s_kobj); 27123197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 27133197ebdbSTheodore Ts'o } 27143197ebdbSTheodore Ts'o 271552cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 27163197ebdbSTheodore Ts'o .show = ext4_attr_show, 27173197ebdbSTheodore Ts'o .store = ext4_attr_store, 27183197ebdbSTheodore Ts'o }; 27193197ebdbSTheodore Ts'o 27203197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 27213197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 27223197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 27233197ebdbSTheodore Ts'o .release = ext4_sb_release, 27243197ebdbSTheodore Ts'o }; 27253197ebdbSTheodore Ts'o 2726857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2727857ac889SLukas Czerner { 2728857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2729857ac889SLukas Czerner } 2730857ac889SLukas Czerner 2731c7f72543SLukas Czerner static ssize_t ext4_feat_show(struct kobject *kobj, 2732c7f72543SLukas Czerner struct attribute *attr, char *buf) 2733c7f72543SLukas Czerner { 2734c7f72543SLukas Czerner return snprintf(buf, PAGE_SIZE, "supported\n"); 2735c7f72543SLukas Czerner } 2736c7f72543SLukas Czerner 2737c7f72543SLukas Czerner /* 2738c7f72543SLukas Czerner * We can not use ext4_attr_show/store because it relies on the kobject 2739c7f72543SLukas Czerner * being embedded in the ext4_sb_info structure which is definitely not 2740c7f72543SLukas Czerner * true in this case. 2741c7f72543SLukas Czerner */ 2742c7f72543SLukas Czerner static const struct sysfs_ops ext4_feat_ops = { 2743c7f72543SLukas Czerner .show = ext4_feat_show, 2744c7f72543SLukas Czerner .store = NULL, 2745c7f72543SLukas Czerner }; 2746c7f72543SLukas Czerner 2747857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2748857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2749c7f72543SLukas Czerner .sysfs_ops = &ext4_feat_ops, 2750857ac889SLukas Czerner .release = ext4_feat_release, 2751857ac889SLukas Czerner }; 2752857ac889SLukas Czerner 2753a13fb1a4SEric Sandeen /* 2754a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2755a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2756a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2757a13fb1a4SEric Sandeen * 0 if it cannot be. 2758a13fb1a4SEric Sandeen */ 2759a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2760a13fb1a4SEric Sandeen { 2761a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2762a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2763a13fb1a4SEric Sandeen "Couldn't mount because of " 2764a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2765a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2766a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2767a13fb1a4SEric Sandeen return 0; 2768a13fb1a4SEric Sandeen } 2769a13fb1a4SEric Sandeen 2770a13fb1a4SEric Sandeen if (readonly) 2771a13fb1a4SEric Sandeen return 1; 2772a13fb1a4SEric Sandeen 2773a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2774a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2775a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2776a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2777a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2778a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2779a13fb1a4SEric Sandeen return 0; 2780a13fb1a4SEric Sandeen } 2781a13fb1a4SEric Sandeen /* 2782a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2783a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2784a13fb1a4SEric Sandeen */ 2785a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2786a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2787a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2788a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2789a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2790a13fb1a4SEric Sandeen return 0; 2791a13fb1a4SEric Sandeen } 2792a13fb1a4SEric Sandeen } 2793bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2794bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2795bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2796bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2797bab08ab9STheodore Ts'o "extents feature\n"); 2798bab08ab9STheodore Ts'o return 0; 2799bab08ab9STheodore Ts'o } 28007c319d32SAditya Kali 28017c319d32SAditya Kali #ifndef CONFIG_QUOTA 28027c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 28037c319d32SAditya Kali !readonly) { 28047c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28057c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28067c319d32SAditya Kali "without CONFIG_QUOTA"); 28077c319d32SAditya Kali return 0; 28087c319d32SAditya Kali } 28097c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2810a13fb1a4SEric Sandeen return 1; 2811a13fb1a4SEric Sandeen } 2812a13fb1a4SEric Sandeen 281366e61a9eSTheodore Ts'o /* 281466e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 281566e61a9eSTheodore Ts'o * on the file system 281666e61a9eSTheodore Ts'o */ 281766e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 281866e61a9eSTheodore Ts'o { 281966e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 282066e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 282166e61a9eSTheodore Ts'o struct ext4_super_block *es; 282266e61a9eSTheodore Ts'o 282366e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 282466e61a9eSTheodore Ts'o es = sbi->s_es; 282566e61a9eSTheodore Ts'o 282666e61a9eSTheodore Ts'o if (es->s_error_count) 2827ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2828ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 282966e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 283066e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2831ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 283266e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 283366e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 283466e61a9eSTheodore Ts'o es->s_first_error_func, 283566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 283666e61a9eSTheodore Ts'o if (es->s_first_error_ino) 283766e61a9eSTheodore Ts'o printk(": inode %u", 283866e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 283966e61a9eSTheodore Ts'o if (es->s_first_error_block) 284066e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 284166e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 284266e61a9eSTheodore Ts'o printk("\n"); 284366e61a9eSTheodore Ts'o } 284466e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2845ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 284666e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 284766e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 284866e61a9eSTheodore Ts'o es->s_last_error_func, 284966e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 285066e61a9eSTheodore Ts'o if (es->s_last_error_ino) 285166e61a9eSTheodore Ts'o printk(": inode %u", 285266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 285366e61a9eSTheodore Ts'o if (es->s_last_error_block) 285466e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 285566e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 285666e61a9eSTheodore Ts'o printk("\n"); 285766e61a9eSTheodore Ts'o } 285866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 285966e61a9eSTheodore Ts'o } 286066e61a9eSTheodore Ts'o 2861bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2862bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2863bfff6873SLukas Czerner { 2864bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2865bfff6873SLukas Czerner ext4_group_t group, ngroups; 2866bfff6873SLukas Czerner struct super_block *sb; 2867bfff6873SLukas Czerner unsigned long timeout = 0; 2868bfff6873SLukas Czerner int ret = 0; 2869bfff6873SLukas Czerner 2870bfff6873SLukas Czerner sb = elr->lr_super; 2871bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2872bfff6873SLukas Czerner 28738e8ad8a5SJan Kara sb_start_write(sb); 2874bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2875bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2876bfff6873SLukas Czerner if (!gdp) { 2877bfff6873SLukas Czerner ret = 1; 2878bfff6873SLukas Czerner break; 2879bfff6873SLukas Czerner } 2880bfff6873SLukas Czerner 2881bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2882bfff6873SLukas Czerner break; 2883bfff6873SLukas Czerner } 2884bfff6873SLukas Czerner 28857f511862STheodore Ts'o if (group >= ngroups) 2886bfff6873SLukas Czerner ret = 1; 2887bfff6873SLukas Czerner 2888bfff6873SLukas Czerner if (!ret) { 2889bfff6873SLukas Czerner timeout = jiffies; 2890bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2891bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2892bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 289351ce6511SLukas Czerner timeout = (jiffies - timeout) * 289451ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2895bfff6873SLukas Czerner elr->lr_timeout = timeout; 2896bfff6873SLukas Czerner } 2897bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2898bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2899bfff6873SLukas Czerner } 29008e8ad8a5SJan Kara sb_end_write(sb); 2901bfff6873SLukas Czerner 2902bfff6873SLukas Czerner return ret; 2903bfff6873SLukas Czerner } 2904bfff6873SLukas Czerner 2905bfff6873SLukas Czerner /* 2906bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29074ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2908bfff6873SLukas Czerner */ 2909bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2910bfff6873SLukas Czerner { 2911bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2912bfff6873SLukas Czerner 2913bfff6873SLukas Czerner if (!elr) 2914bfff6873SLukas Czerner return; 2915bfff6873SLukas Czerner 2916bfff6873SLukas Czerner sbi = elr->lr_sbi; 2917bfff6873SLukas Czerner 2918bfff6873SLukas Czerner list_del(&elr->lr_request); 2919bfff6873SLukas Czerner sbi->s_li_request = NULL; 2920bfff6873SLukas Czerner kfree(elr); 2921bfff6873SLukas Czerner } 2922bfff6873SLukas Czerner 2923bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2924bfff6873SLukas Czerner { 29251bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29261bb933fbSLukas Czerner if (!ext4_li_info) { 29271bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2928bfff6873SLukas Czerner return; 29291bb933fbSLukas Czerner } 2930bfff6873SLukas Czerner 2931bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29321bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2933bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29341bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2935bfff6873SLukas Czerner } 2936bfff6873SLukas Czerner 29378f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29388f1f7453SEric Sandeen 2939bfff6873SLukas Czerner /* 2940bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2941bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2942bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2943bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2944bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2945bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2946bfff6873SLukas Czerner * next waking time and put itself into sleep. 2947bfff6873SLukas Czerner */ 2948bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2949bfff6873SLukas Czerner { 2950bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2951bfff6873SLukas Czerner struct list_head *pos, *n; 2952bfff6873SLukas Czerner struct ext4_li_request *elr; 29534ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2954bfff6873SLukas Czerner 2955bfff6873SLukas Czerner BUG_ON(NULL == eli); 2956bfff6873SLukas Czerner 2957bfff6873SLukas Czerner cont_thread: 2958bfff6873SLukas Czerner while (true) { 2959bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2960bfff6873SLukas Czerner 2961bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2962bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2963bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2964bfff6873SLukas Czerner goto exit_thread; 2965bfff6873SLukas Czerner } 2966bfff6873SLukas Czerner 2967bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2968bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2969bfff6873SLukas Czerner lr_request); 2970bfff6873SLukas Czerner 2971b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2972b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2973b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2974bfff6873SLukas Czerner ext4_remove_li_request(elr); 2975bfff6873SLukas Czerner continue; 2976bfff6873SLukas Czerner } 2977b2c78cd0STheodore Ts'o } 2978bfff6873SLukas Czerner 2979bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2980bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2981bfff6873SLukas Czerner } 2982bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2983bfff6873SLukas Czerner 2984a0acae0eSTejun Heo try_to_freeze(); 2985bfff6873SLukas Czerner 29864ed5c033SLukas Czerner cur = jiffies; 29874ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2988f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2989bfff6873SLukas Czerner cond_resched(); 2990bfff6873SLukas Czerner continue; 2991bfff6873SLukas Czerner } 2992bfff6873SLukas Czerner 29934ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 29944ed5c033SLukas Czerner 29958f1f7453SEric Sandeen if (kthread_should_stop()) { 29968f1f7453SEric Sandeen ext4_clear_request_list(); 29978f1f7453SEric Sandeen goto exit_thread; 29988f1f7453SEric Sandeen } 2999bfff6873SLukas Czerner } 3000bfff6873SLukas Czerner 3001bfff6873SLukas Czerner exit_thread: 3002bfff6873SLukas Czerner /* 3003bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3004bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3005bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3006bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3007bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3008bfff6873SLukas Czerner * new one. 3009bfff6873SLukas Czerner */ 3010bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3011bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3012bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3013bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3014bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3015bfff6873SLukas Czerner goto cont_thread; 3016bfff6873SLukas Czerner } 3017bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3018bfff6873SLukas Czerner kfree(ext4_li_info); 3019bfff6873SLukas Czerner ext4_li_info = NULL; 3020bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3021bfff6873SLukas Czerner 3022bfff6873SLukas Czerner return 0; 3023bfff6873SLukas Czerner } 3024bfff6873SLukas Czerner 3025bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3026bfff6873SLukas Czerner { 3027bfff6873SLukas Czerner struct list_head *pos, *n; 3028bfff6873SLukas Czerner struct ext4_li_request *elr; 3029bfff6873SLukas Czerner 3030bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3031bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3032bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3033bfff6873SLukas Czerner lr_request); 3034bfff6873SLukas Czerner ext4_remove_li_request(elr); 3035bfff6873SLukas Czerner } 3036bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3037bfff6873SLukas Czerner } 3038bfff6873SLukas Czerner 3039bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3040bfff6873SLukas Czerner { 30418f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30428f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30438f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30448f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3045bfff6873SLukas Czerner ext4_clear_request_list(); 3046bfff6873SLukas Czerner kfree(ext4_li_info); 3047bfff6873SLukas Czerner ext4_li_info = NULL; 304892b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3049bfff6873SLukas Czerner "initialization thread\n", 3050bfff6873SLukas Czerner err); 3051bfff6873SLukas Czerner return err; 3052bfff6873SLukas Czerner } 3053bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3054bfff6873SLukas Czerner return 0; 3055bfff6873SLukas Czerner } 3056bfff6873SLukas Czerner 3057bfff6873SLukas Czerner /* 3058bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3059bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3060bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3061bfff6873SLukas Czerner * groups and return total number of groups. 3062bfff6873SLukas Czerner */ 3063bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3064bfff6873SLukas Czerner { 3065bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3066bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3067bfff6873SLukas Czerner 3068bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3069bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3070bfff6873SLukas Czerner if (!gdp) 3071bfff6873SLukas Czerner continue; 3072bfff6873SLukas Czerner 3073bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3074bfff6873SLukas Czerner break; 3075bfff6873SLukas Czerner } 3076bfff6873SLukas Czerner 3077bfff6873SLukas Czerner return group; 3078bfff6873SLukas Czerner } 3079bfff6873SLukas Czerner 3080bfff6873SLukas Czerner static int ext4_li_info_new(void) 3081bfff6873SLukas Czerner { 3082bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3083bfff6873SLukas Czerner 3084bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3085bfff6873SLukas Czerner if (!eli) 3086bfff6873SLukas Czerner return -ENOMEM; 3087bfff6873SLukas Czerner 3088bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3089bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3090bfff6873SLukas Czerner 3091bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3092bfff6873SLukas Czerner 3093bfff6873SLukas Czerner ext4_li_info = eli; 3094bfff6873SLukas Czerner 3095bfff6873SLukas Czerner return 0; 3096bfff6873SLukas Czerner } 3097bfff6873SLukas Czerner 3098bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3099bfff6873SLukas Czerner ext4_group_t start) 3100bfff6873SLukas Czerner { 3101bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3102bfff6873SLukas Czerner struct ext4_li_request *elr; 3103bfff6873SLukas Czerner 3104bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3105bfff6873SLukas Czerner if (!elr) 3106bfff6873SLukas Czerner return NULL; 3107bfff6873SLukas Czerner 3108bfff6873SLukas Czerner elr->lr_super = sb; 3109bfff6873SLukas Czerner elr->lr_sbi = sbi; 3110bfff6873SLukas Czerner elr->lr_next_group = start; 3111bfff6873SLukas Czerner 3112bfff6873SLukas Czerner /* 3113bfff6873SLukas Czerner * Randomize first schedule time of the request to 3114bfff6873SLukas Czerner * spread the inode table initialization requests 3115bfff6873SLukas Czerner * better. 3116bfff6873SLukas Czerner */ 3117dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3118dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3119bfff6873SLukas Czerner return elr; 3120bfff6873SLukas Czerner } 3121bfff6873SLukas Czerner 31227f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3123bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3124bfff6873SLukas Czerner { 3125bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31267f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3127bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 31286c5a6cb9SAndrew Morton int ret = 0; 3129bfff6873SLukas Czerner 31307f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 313151ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 313251ce6511SLukas Czerner /* 313351ce6511SLukas Czerner * Reset timeout so it can be computed again, because 313451ce6511SLukas Czerner * s_li_wait_mult might have changed. 313551ce6511SLukas Czerner */ 313651ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31377f511862STheodore Ts'o goto out; 313851ce6511SLukas Czerner } 3139bfff6873SLukas Czerner 3140bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3141bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 314255ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31437f511862STheodore Ts'o goto out; 3144bfff6873SLukas Czerner 3145bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31467f511862STheodore Ts'o if (!elr) { 31477f511862STheodore Ts'o ret = -ENOMEM; 31487f511862STheodore Ts'o goto out; 31497f511862STheodore Ts'o } 3150bfff6873SLukas Czerner 3151bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3152bfff6873SLukas Czerner ret = ext4_li_info_new(); 3153bfff6873SLukas Czerner if (ret) 3154bfff6873SLukas Czerner goto out; 3155bfff6873SLukas Czerner } 3156bfff6873SLukas Czerner 3157bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3158bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3159bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3160bfff6873SLukas Czerner 3161bfff6873SLukas Czerner sbi->s_li_request = elr; 316246e4690bSTao Ma /* 316346e4690bSTao Ma * set elr to NULL here since it has been inserted to 316446e4690bSTao Ma * the request_list and the removal and free of it is 316546e4690bSTao Ma * handled by ext4_clear_request_list from now on. 316646e4690bSTao Ma */ 316746e4690bSTao Ma elr = NULL; 3168bfff6873SLukas Czerner 3169bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3170bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3171bfff6873SLukas Czerner if (ret) 3172bfff6873SLukas Czerner goto out; 3173bfff6873SLukas Czerner } 3174bfff6873SLukas Czerner out: 3175bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3176beed5ecbSNicolas Kaiser if (ret) 3177bfff6873SLukas Czerner kfree(elr); 3178bfff6873SLukas Czerner return ret; 3179bfff6873SLukas Czerner } 3180bfff6873SLukas Czerner 3181bfff6873SLukas Czerner /* 3182bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3183bfff6873SLukas Czerner * module unload. 3184bfff6873SLukas Czerner */ 3185bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3186bfff6873SLukas Czerner { 3187bfff6873SLukas Czerner /* 3188bfff6873SLukas Czerner * If thread exited earlier 3189bfff6873SLukas Czerner * there's nothing to be done. 3190bfff6873SLukas Czerner */ 31918f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3192bfff6873SLukas Czerner return; 3193bfff6873SLukas Czerner 31948f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3195bfff6873SLukas Czerner } 3196bfff6873SLukas Czerner 319725ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 319825ed6e8aSDarrick J. Wong { 319925ed6e8aSDarrick J. Wong int ret = 1; 320025ed6e8aSDarrick J. Wong int compat, incompat; 320125ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 320225ed6e8aSDarrick J. Wong 32039aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3204db9ee220SDarrick J. Wong /* journal checksum v3 */ 320525ed6e8aSDarrick J. Wong compat = 0; 3206db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 320725ed6e8aSDarrick J. Wong } else { 320825ed6e8aSDarrick J. Wong /* journal checksum v1 */ 320925ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 321025ed6e8aSDarrick J. Wong incompat = 0; 321125ed6e8aSDarrick J. Wong } 321225ed6e8aSDarrick J. Wong 3213feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3214feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3215feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3216feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 321725ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 321825ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 321925ed6e8aSDarrick J. Wong compat, 0, 322025ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 322125ed6e8aSDarrick J. Wong incompat); 322225ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 322325ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 322425ed6e8aSDarrick J. Wong compat, 0, 322525ed6e8aSDarrick J. Wong incompat); 322625ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 322725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 322825ed6e8aSDarrick J. Wong } else { 3229feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3230feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 323125ed6e8aSDarrick J. Wong } 323225ed6e8aSDarrick J. Wong 323325ed6e8aSDarrick J. Wong return ret; 323425ed6e8aSDarrick J. Wong } 323525ed6e8aSDarrick J. Wong 3236952fc18eSTheodore Ts'o /* 3237952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3238952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3239952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3240952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3241952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3242952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3243952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3244952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3245952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3246952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3247952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3248952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3249952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3250952fc18eSTheodore Ts'o */ 3251952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3252952fc18eSTheodore Ts'o char *buf) 3253952fc18eSTheodore Ts'o { 3254952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3255952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3256952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3257952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3258952fc18eSTheodore Ts'o int s, j, count = 0; 3259952fc18eSTheodore Ts'o 32600548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 32610548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32620548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32630548bbb8STheodore Ts'o 3264952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3265952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3266952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3267952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3268952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3269952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3270952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3271952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3272952fc18eSTheodore Ts'o count++; 3273952fc18eSTheodore Ts'o } 3274952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3275952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3276952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3277952fc18eSTheodore Ts'o count++; 3278952fc18eSTheodore Ts'o } 3279952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3280952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3281952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3282952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3283952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3284952fc18eSTheodore Ts'o count++; 3285952fc18eSTheodore Ts'o } 3286952fc18eSTheodore Ts'o if (i != grp) 3287952fc18eSTheodore Ts'o continue; 3288952fc18eSTheodore Ts'o s = 0; 3289952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3290952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3291952fc18eSTheodore Ts'o count++; 3292952fc18eSTheodore Ts'o } 3293952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3294952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3295952fc18eSTheodore Ts'o count++; 3296952fc18eSTheodore Ts'o } 3297952fc18eSTheodore Ts'o } 3298952fc18eSTheodore Ts'o if (!count) 3299952fc18eSTheodore Ts'o return 0; 3300952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3301952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3302952fc18eSTheodore Ts'o } 3303952fc18eSTheodore Ts'o 3304952fc18eSTheodore Ts'o /* 3305952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3306952fc18eSTheodore Ts'o */ 3307952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3308952fc18eSTheodore Ts'o { 3309952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3310952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3311952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3312952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3313952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3314952fc18eSTheodore Ts'o 3315952fc18eSTheodore Ts'o if (!buf) 3316952fc18eSTheodore Ts'o return -ENOMEM; 3317952fc18eSTheodore Ts'o 3318952fc18eSTheodore Ts'o /* 3319952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3320952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3321952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3322952fc18eSTheodore Ts'o */ 3323952fc18eSTheodore Ts'o 3324952fc18eSTheodore Ts'o /* 3325952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3326952fc18eSTheodore Ts'o */ 3327952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3328952fc18eSTheodore Ts'o 3329952fc18eSTheodore Ts'o /* 3330952fc18eSTheodore Ts'o * Add the overhead found in each block group 3331952fc18eSTheodore Ts'o */ 3332952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3333952fc18eSTheodore Ts'o int blks; 3334952fc18eSTheodore Ts'o 3335952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3336952fc18eSTheodore Ts'o overhead += blks; 3337952fc18eSTheodore Ts'o if (blks) 3338952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3339952fc18eSTheodore Ts'o cond_resched(); 3340952fc18eSTheodore Ts'o } 33410875a2b4SEric Sandeen /* Add the journal blocks as well */ 33420875a2b4SEric Sandeen if (sbi->s_journal) 3343810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33440875a2b4SEric Sandeen 3345952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3346952fc18eSTheodore Ts'o smp_wmb(); 3347952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3348952fc18eSTheodore Ts'o return 0; 3349952fc18eSTheodore Ts'o } 3350952fc18eSTheodore Ts'o 335127dd4385SLukas Czerner 335230fac0f7SJan Kara static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) 335327dd4385SLukas Czerner { 335427dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 335527dd4385SLukas Czerner 335627dd4385SLukas Czerner /* 335730fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 335830fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 335930fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 336030fac0f7SJan Kara * to keep ext2/3 backward compatibility. 336130fac0f7SJan Kara */ 336230fac0f7SJan Kara if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 336330fac0f7SJan Kara return 0; 336430fac0f7SJan Kara /* 336527dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 336627dd4385SLukas Czerner * This should cover the situations where we can not afford to run 336727dd4385SLukas Czerner * out of space like for example punch hole, or converting 3368556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 336927dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 337027dd4385SLukas Czerner * very rare. 337127dd4385SLukas Czerner */ 337230fac0f7SJan Kara resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> 337330fac0f7SJan Kara EXT4_SB(sb)->s_cluster_bits; 337427dd4385SLukas Czerner 337527dd4385SLukas Czerner do_div(resv_clusters, 50); 337627dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 337727dd4385SLukas Czerner 337827dd4385SLukas Czerner return resv_clusters; 337927dd4385SLukas Czerner } 338027dd4385SLukas Czerner 338127dd4385SLukas Czerner 338227dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) 338327dd4385SLukas Czerner { 338427dd4385SLukas Czerner ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> 338527dd4385SLukas Czerner sbi->s_cluster_bits; 338627dd4385SLukas Czerner 338727dd4385SLukas Czerner if (count >= clusters) 338827dd4385SLukas Czerner return -EINVAL; 338927dd4385SLukas Czerner 339027dd4385SLukas Czerner atomic64_set(&sbi->s_resv_clusters, count); 339127dd4385SLukas Czerner return 0; 339227dd4385SLukas Czerner } 339327dd4385SLukas Czerner 3394617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3395ac27a0ecSDave Kleikamp { 3396d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3397ac27a0ecSDave Kleikamp struct buffer_head *bh; 3398617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3399617ba13bSMingming Cao struct ext4_sb_info *sbi; 3400617ba13bSMingming Cao ext4_fsblk_t block; 3401617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 340270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3403ac27a0ecSDave Kleikamp unsigned long offset = 0; 3404ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3405ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3406ac27a0ecSDave Kleikamp struct inode *root; 34079f6200bbSTheodore Ts'o char *cp; 34080390131bSFrank Mayhar const char *descr; 3409dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3410281b5995STheodore Ts'o int blocksize, clustersize; 34114ec11028STheodore Ts'o unsigned int db_count; 34124ec11028STheodore Ts'o unsigned int i; 3413281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3414bd81d8eeSLaurent Vivier __u64 blocks_count; 341507aa2ea1SLukas Czerner int err = 0; 3416b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3417bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3418ac27a0ecSDave Kleikamp 3419ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3420ac27a0ecSDave Kleikamp if (!sbi) 3421dcc7dae3SCyrill Gorcunov goto out_free_orig; 3422705895b6SPekka Enberg 3423705895b6SPekka Enberg sbi->s_blockgroup_lock = 3424705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3425705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3426705895b6SPekka Enberg kfree(sbi); 3427dcc7dae3SCyrill Gorcunov goto out_free_orig; 3428705895b6SPekka Enberg } 3429ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34302c0544b2STheodore Ts'o sbi->s_sb = sb; 3431240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3432d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3433f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3434f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3435f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3436ac27a0ecSDave Kleikamp 34379f6200bbSTheodore Ts'o /* Cleanup superblock name */ 34389f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 34399f6200bbSTheodore Ts'o *cp = '!'; 34409f6200bbSTheodore Ts'o 344107aa2ea1SLukas Czerner /* -EINVAL is default */ 3442dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3443617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3444ac27a0ecSDave Kleikamp if (!blocksize) { 3445b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3446ac27a0ecSDave Kleikamp goto out_fail; 3447ac27a0ecSDave Kleikamp } 3448ac27a0ecSDave Kleikamp 3449ac27a0ecSDave Kleikamp /* 3450617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3451ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3452ac27a0ecSDave Kleikamp */ 3453617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 345470bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 345570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3456ac27a0ecSDave Kleikamp } else { 345770bbb3e0SAndrew Morton logical_sb_block = sb_block; 3458ac27a0ecSDave Kleikamp } 3459ac27a0ecSDave Kleikamp 3460a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3461b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3462ac27a0ecSDave Kleikamp goto out_fail; 3463ac27a0ecSDave Kleikamp } 3464ac27a0ecSDave Kleikamp /* 3465ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3466617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3467ac27a0ecSDave Kleikamp */ 34682716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3469ac27a0ecSDave Kleikamp sbi->s_es = es; 3470ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3471617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3472617ba13bSMingming Cao goto cantfind_ext4; 3473afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3474ac27a0ecSDave Kleikamp 3475feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3476feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3477feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3478feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3479feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3480feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3481feb0ab32SDarrick J. Wong 3482d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3483d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3484d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3485d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3486d25425f8SDarrick J. Wong silent = 1; 3487d25425f8SDarrick J. Wong goto cantfind_ext4; 3488d25425f8SDarrick J. Wong } 3489d25425f8SDarrick J. Wong 34900441984aSDarrick J. Wong /* Load the checksum driver */ 34910441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 34920441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 34930441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 34940441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 34950441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 34960441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 34970441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 34980441984aSDarrick J. Wong goto failed_mount; 34990441984aSDarrick J. Wong } 35000441984aSDarrick J. Wong } 35010441984aSDarrick J. Wong 3502a9c47317SDarrick J. Wong /* Check superblock checksum */ 3503a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3504a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3505a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3506a9c47317SDarrick J. Wong silent = 1; 3507a9c47317SDarrick J. Wong goto cantfind_ext4; 3508a9c47317SDarrick J. Wong } 3509a9c47317SDarrick J. Wong 3510a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 35119aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) 3512a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3513a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3514a9c47317SDarrick J. Wong 3515ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3516ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3517fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3518617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3519fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 352087f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3521fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3522617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3523fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3524ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3525fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 352603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3527fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35282e7842b8SHugh Dickins #endif 352998c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 353098c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 353198c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 353298c1a759SDarrick J. Wong 3533617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3534fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3535617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3536fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3537617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3538fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3539ac27a0ecSDave Kleikamp 3540617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3541fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3542bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3543fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3544bb4f397aSAneesh Kumar K.V else 3545fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 354645f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3547fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35488b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3549fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3550ac27a0ecSDave Kleikamp 355108cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 355208cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 355330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 355430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 355530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3556ac27a0ecSDave Kleikamp 35578b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3558fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3559ac27a0ecSDave Kleikamp 35601e2462f9SMingming Cao /* 3561dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3562dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3563dd919b98SAneesh Kumar K.V */ 3564bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35658b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3566fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3567dd919b98SAneesh Kumar K.V 356851ce6511SLukas Czerner /* 356951ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 357051ce6511SLukas Czerner * no mount option specified. 357151ce6511SLukas Czerner */ 357251ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 357351ce6511SLukas Czerner 35748b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3575661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 35768b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35778b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35788b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 35798b67f04aSTheodore Ts'o } 35805a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3581b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3582661aa520SEric Sandeen &journal_ioprio, 0)) 3583ac27a0ecSDave Kleikamp goto failed_mount; 3584ac27a0ecSDave Kleikamp 358556889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 358656889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 358756889787STheodore Ts'o "with data=journal disables delayed " 358856889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 358956889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 359056889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 359156889787STheodore Ts'o "both data=journal and delalloc"); 359256889787STheodore Ts'o goto failed_mount; 359356889787STheodore Ts'o } 359456889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 359556889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 35966ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 359756889787STheodore Ts'o goto failed_mount; 359856889787STheodore Ts'o } 359956889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 360056889787STheodore Ts'o clear_opt(sb, DELALLOC); 360156889787STheodore Ts'o } 360256889787STheodore Ts'o 3603ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3604482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3605ac27a0ecSDave Kleikamp 3606617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3607617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3608617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3609617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3610b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3611b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3612b31e1552SEric Sandeen "running e2fsck is recommended"); 3613469108ffSTheodore Tso 3614ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3615ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3616ed3654ebSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, 3617ed3654ebSTheodore Ts'o EXT4_FEATURE_INCOMPAT_64BIT)) { 3618ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3619ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3620ed3654ebSTheodore Ts'o goto failed_mount; 3621ed3654ebSTheodore Ts'o } 3622ed3654ebSTheodore Ts'o } 3623ed3654ebSTheodore Ts'o 36242035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36252035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36262035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36272035e776STheodore Ts'o "using the ext4 subsystem"); 36282035e776STheodore Ts'o else { 36292035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36302035e776STheodore Ts'o "to feature incompatibilities"); 36312035e776STheodore Ts'o goto failed_mount; 36322035e776STheodore Ts'o } 36332035e776STheodore Ts'o } 36342035e776STheodore Ts'o 36352035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36362035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36372035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36382035e776STheodore Ts'o "using the ext4 subsystem"); 36392035e776STheodore Ts'o else { 36402035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36412035e776STheodore Ts'o "to feature incompatibilities"); 36422035e776STheodore Ts'o goto failed_mount; 36432035e776STheodore Ts'o } 36442035e776STheodore Ts'o } 36452035e776STheodore Ts'o 3646469108ffSTheodore Tso /* 3647ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3648ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3649ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3650ac27a0ecSDave Kleikamp */ 3651a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3652ac27a0ecSDave Kleikamp goto failed_mount; 3653a13fb1a4SEric Sandeen 3654261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3655617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3656617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3657b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3658b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3659ac27a0ecSDave Kleikamp goto failed_mount; 3660ac27a0ecSDave Kleikamp } 3661ac27a0ecSDave Kleikamp 3662ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3663ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3664ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3665b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3666ce40733cSAneesh Kumar K.V blocksize); 3667ac27a0ecSDave Kleikamp goto failed_mount; 3668ac27a0ecSDave Kleikamp } 3669ac27a0ecSDave Kleikamp 3670ac27a0ecSDave Kleikamp brelse(bh); 367170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 367270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3673a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3674ac27a0ecSDave Kleikamp if (!bh) { 3675b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3676b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3677ac27a0ecSDave Kleikamp goto failed_mount; 3678ac27a0ecSDave Kleikamp } 36792716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3680ac27a0ecSDave Kleikamp sbi->s_es = es; 3681617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3682b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3683b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3684ac27a0ecSDave Kleikamp goto failed_mount; 3685ac27a0ecSDave Kleikamp } 3686ac27a0ecSDave Kleikamp } 3687ac27a0ecSDave Kleikamp 3688a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3689a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3690f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3691f287a1a5STheodore Ts'o has_huge_files); 3692f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3693ac27a0ecSDave Kleikamp 3694617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3695617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3696617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3697ac27a0ecSDave Kleikamp } else { 3698ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3699ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3700617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 37011330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3702ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3703b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3704b31e1552SEric Sandeen "unsupported inode size: %d", 3705ac27a0ecSDave Kleikamp sbi->s_inode_size); 3706ac27a0ecSDave Kleikamp goto failed_mount; 3707ac27a0ecSDave Kleikamp } 3708ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3709ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3710ac27a0ecSDave Kleikamp } 37110b8e58a1SAndreas Dilger 37120d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 37130d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 37148fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 37150d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3716d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3717b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3718b31e1552SEric Sandeen "unsupported descriptor size %lu", 37190d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37200d1ee42fSAlexandre Ratchov goto failed_mount; 37210d1ee42fSAlexandre Ratchov } 37220d1ee42fSAlexandre Ratchov } else 37230d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37240b8e58a1SAndreas Dilger 3725ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3726ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3727b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3728617ba13bSMingming Cao goto cantfind_ext4; 37290b8e58a1SAndreas Dilger 3730617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3731ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3732617ba13bSMingming Cao goto cantfind_ext4; 3733ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3734ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37350d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3736ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3737ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3738e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3739e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37400b8e58a1SAndreas Dilger 3741ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3742ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3743ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 374423301410STheodore Ts'o if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { 3745f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3746f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3747f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3748f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3749f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 375023301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 375123301410STheodore Ts'o es->s_flags |= 375223301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3753f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3754f99b2589STheodore Ts'o #else 375523301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 375623301410STheodore Ts'o es->s_flags |= 375723301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3758f99b2589STheodore Ts'o #endif 3759f99b2589STheodore Ts'o } 376023301410STheodore Ts'o } 3761ac27a0ecSDave Kleikamp 3762281b5995STheodore Ts'o /* Handle clustersize */ 3763281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3764281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3765281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3766281b5995STheodore Ts'o if (has_bigalloc) { 3767281b5995STheodore Ts'o if (clustersize < blocksize) { 3768281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3769281b5995STheodore Ts'o "cluster size (%d) smaller than " 3770281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3771281b5995STheodore Ts'o goto failed_mount; 3772281b5995STheodore Ts'o } 3773281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3774281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3775281b5995STheodore Ts'o sbi->s_clusters_per_group = 3776281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3777281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3778281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3779281b5995STheodore Ts'o "#clusters per group too big: %lu", 3780281b5995STheodore Ts'o sbi->s_clusters_per_group); 3781281b5995STheodore Ts'o goto failed_mount; 3782281b5995STheodore Ts'o } 3783281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3784281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3785281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3786281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3787281b5995STheodore Ts'o sbi->s_blocks_per_group, 3788281b5995STheodore Ts'o sbi->s_clusters_per_group); 3789281b5995STheodore Ts'o goto failed_mount; 3790281b5995STheodore Ts'o } 3791281b5995STheodore Ts'o } else { 3792281b5995STheodore Ts'o if (clustersize != blocksize) { 3793281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3794281b5995STheodore Ts'o "block size (%d)", clustersize, 3795281b5995STheodore Ts'o blocksize); 3796281b5995STheodore Ts'o clustersize = blocksize; 3797281b5995STheodore Ts'o } 3798ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3799b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3800b31e1552SEric Sandeen "#blocks per group too big: %lu", 3801ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3802ac27a0ecSDave Kleikamp goto failed_mount; 3803ac27a0ecSDave Kleikamp } 3804281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3805281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3806281b5995STheodore Ts'o } 3807281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3808281b5995STheodore Ts'o 3809ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3810b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3811b31e1552SEric Sandeen "#inodes per group too big: %lu", 3812ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3813ac27a0ecSDave Kleikamp goto failed_mount; 3814ac27a0ecSDave Kleikamp } 3815ac27a0ecSDave Kleikamp 3816960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3817960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3818960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3819960fd856STheodore Ts'o 3820bf43d84bSEric Sandeen /* 3821bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3822bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3823bf43d84bSEric Sandeen */ 38245a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 382530ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38265a9ae68aSDarrick J. Wong if (err) { 3827b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3828bf43d84bSEric Sandeen " too large to mount safely on this system"); 3829ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 383090c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3831ac27a0ecSDave Kleikamp goto failed_mount; 3832ac27a0ecSDave Kleikamp } 3833ac27a0ecSDave Kleikamp 3834617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3835617ba13bSMingming Cao goto cantfind_ext4; 3836e7c95593SEric Sandeen 38370f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38380f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38390f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3840b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3841b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38420f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38430f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38440f2ddca6SFrom: Thiemo Nagel } 38450f2ddca6SFrom: Thiemo Nagel 38464ec11028STheodore Ts'o /* 38474ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38484ec11028STheodore Ts'o * of the filesystem. 38494ec11028STheodore Ts'o */ 38504ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3851b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3852b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3853e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38544ec11028STheodore Ts'o ext4_blocks_count(es)); 3855e7c95593SEric Sandeen goto failed_mount; 3856e7c95593SEric Sandeen } 3857bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3858bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3859bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3860bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 38614ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3862b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 38634ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3864b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 38654ec11028STheodore Ts'o ext4_blocks_count(es), 38664ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 38674ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 38684ec11028STheodore Ts'o goto failed_mount; 38694ec11028STheodore Ts'o } 3870bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3871fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3872fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3873617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3874617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3875f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3876f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3877ac27a0ecSDave Kleikamp GFP_KERNEL); 3878ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3879b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 38802cde417dSTheodore Ts'o ret = -ENOMEM; 3881ac27a0ecSDave Kleikamp goto failed_mount; 3882ac27a0ecSDave Kleikamp } 3883ac27a0ecSDave Kleikamp 38849f6200bbSTheodore Ts'o if (ext4_proc_root) 38859f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3886240799cdSTheodore Ts'o 388766acdcf4STheodore Ts'o if (sbi->s_proc) 388866acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 388966acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 389066acdcf4STheodore Ts'o 3891705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3892ac27a0ecSDave Kleikamp 3893ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 389470bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3895a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3896ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3897b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3898b31e1552SEric Sandeen "can't read group descriptor %d", i); 3899ac27a0ecSDave Kleikamp db_count = i; 3900ac27a0ecSDave Kleikamp goto failed_mount2; 3901ac27a0ecSDave Kleikamp } 3902ac27a0ecSDave Kleikamp } 3903bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3904b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3905f9ae9cf5STheodore Ts'o goto failed_mount2; 3906ac27a0ecSDave Kleikamp } 3907772cb7c8SJose R. Santos 3908f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3909ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3910ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3911ac27a0ecSDave Kleikamp 391204496411STao Ma init_timer(&sbi->s_err_report); 391304496411STao Ma sbi->s_err_report.function = print_daily_error_info; 391404496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 391504496411STao Ma 3916a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3917eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3918ce7e010aSTheodore Ts'o goto failed_mount3; 3919ce7e010aSTheodore Ts'o 3920c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 392167a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3922c9de560dSAlex Tomas 3923f9ae9cf5STheodore Ts'o /* 3924f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3925f9ae9cf5STheodore Ts'o */ 3926f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3927617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3928617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3929ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3930617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3931262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 39327c319d32SAditya Kali sb->s_qcop = &ext4_qctl_sysfile_operations; 3933262b4662SJan Kara else 3934262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3935ac27a0ecSDave Kleikamp #endif 3936f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3937f2fa2ffcSAneesh Kumar K.V 3938ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39393b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3940ac27a0ecSDave Kleikamp 3941ac27a0ecSDave Kleikamp sb->s_root = NULL; 3942ac27a0ecSDave Kleikamp 3943ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3944617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3945617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3946ac27a0ecSDave Kleikamp 3947c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3948c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3949c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3950c5e06d10SJohann Lombardi goto failed_mount3; 3951c5e06d10SJohann Lombardi 3952ac27a0ecSDave Kleikamp /* 3953ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3954ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3955ac27a0ecSDave Kleikamp */ 3956ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3957617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3958617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3959ac27a0ecSDave Kleikamp goto failed_mount3; 39600390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 39610390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3962b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3963b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3964744692dcSJiaying Zhang goto failed_mount_wq; 3965ac27a0ecSDave Kleikamp } else { 3966fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 39670390131bSFrank Mayhar sbi->s_journal = NULL; 39680390131bSFrank Mayhar needs_recovery = 0; 39690390131bSFrank Mayhar goto no_journal; 3970ac27a0ecSDave Kleikamp } 3971ac27a0ecSDave Kleikamp 3972f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3973eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3974eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3975b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3976744692dcSJiaying Zhang goto failed_mount_wq; 3977eb40a09cSJose R. Santos } 3978eb40a09cSJose R. Santos 397925ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 398025ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 398125ed6e8aSDarrick J. Wong "feature set"); 398225ed6e8aSDarrick J. Wong goto failed_mount_wq; 3983d4da6c9cSLinus Torvalds } 3984818d276cSGirish Shilamkar 3985ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3986ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3987ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3988ac27a0ecSDave Kleikamp case 0: 3989ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 399063f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 399163f57933SAndrew Morton * cope, else JOURNAL_DATA 399263f57933SAndrew Morton */ 3993dab291afSMingming Cao if (jbd2_journal_check_available_features 3994dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3995fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3996ac27a0ecSDave Kleikamp else 3997fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3998ac27a0ecSDave Kleikamp break; 3999ac27a0ecSDave Kleikamp 4000617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4001617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4002dab291afSMingming Cao if (!jbd2_journal_check_available_features 4003dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4004b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4005b31e1552SEric Sandeen "requested data journaling mode"); 4006744692dcSJiaying Zhang goto failed_mount_wq; 4007ac27a0ecSDave Kleikamp } 4008ac27a0ecSDave Kleikamp default: 4009ac27a0ecSDave Kleikamp break; 4010ac27a0ecSDave Kleikamp } 4011b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4012ac27a0ecSDave Kleikamp 401318aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 401418aadd47SBobi Jam 4015ce7e010aSTheodore Ts'o no_journal: 40169c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 40179c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 40189c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40199c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40209c191f70ST Makphaibulchoke goto failed_mount_wq; 40219c191f70ST Makphaibulchoke } 40229c191f70ST Makphaibulchoke } 40239c191f70ST Makphaibulchoke 4024fd89d5f2STejun Heo /* 4025952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4026952fc18eSTheodore Ts'o * superblock if present. 4027952fc18eSTheodore Ts'o */ 4028952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4029952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4030952fc18eSTheodore Ts'o else { 403107aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 403207aa2ea1SLukas Czerner if (err) 4033952fc18eSTheodore Ts'o goto failed_mount_wq; 4034952fc18eSTheodore Ts'o } 4035952fc18eSTheodore Ts'o 4036952fc18eSTheodore Ts'o /* 4037fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4038fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4039fd89d5f2STejun Heo */ 40402e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40412e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40422e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40432e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 404407aa2ea1SLukas Czerner ret = -ENOMEM; 40452e8fa54eSJan Kara goto failed_mount4; 40462e8fa54eSJan Kara } 40472e8fa54eSJan Kara 4048ac27a0ecSDave Kleikamp /* 4049dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4050ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4051ac27a0ecSDave Kleikamp */ 4052ac27a0ecSDave Kleikamp 40531d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 40541d1fe1eeSDavid Howells if (IS_ERR(root)) { 4055b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 40561d1fe1eeSDavid Howells ret = PTR_ERR(root); 405732a9bb57SManish Katiyar root = NULL; 4058ac27a0ecSDave Kleikamp goto failed_mount4; 4059ac27a0ecSDave Kleikamp } 4060ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4061b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 406294bf608aSAl Viro iput(root); 4063ac27a0ecSDave Kleikamp goto failed_mount4; 4064ac27a0ecSDave Kleikamp } 406548fde701SAl Viro sb->s_root = d_make_root(root); 40661d1fe1eeSDavid Howells if (!sb->s_root) { 4067b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 40681d1fe1eeSDavid Howells ret = -ENOMEM; 40691d1fe1eeSDavid Howells goto failed_mount4; 40701d1fe1eeSDavid Howells } 4071ac27a0ecSDave Kleikamp 40727e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 40737e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4074ef7f3835SKalpak Shah 4075ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4076ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 4077ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4078ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4079ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 4080ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 4081ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4082ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4083ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4084ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4085ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4086ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4087ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4088ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4089ef7f3835SKalpak Shah } 4090ef7f3835SKalpak Shah } 4091ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4092ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4093ef7f3835SKalpak Shah sbi->s_inode_size) { 4094ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4095ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4096b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4097b31e1552SEric Sandeen "available"); 4098ef7f3835SKalpak Shah } 4099ef7f3835SKalpak Shah 410030fac0f7SJan Kara err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); 410127dd4385SLukas Czerner if (err) { 410227dd4385SLukas Czerner ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " 410330fac0f7SJan Kara "reserved pool", ext4_calculate_resv_clusters(sb)); 4104f9ae9cf5STheodore Ts'o goto failed_mount4a; 410527dd4385SLukas Czerner } 410627dd4385SLukas Czerner 41076fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 41086fd058f7STheodore Ts'o if (err) { 4109b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4110fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4111f9ae9cf5STheodore Ts'o goto failed_mount4a; 4112f9ae9cf5STheodore Ts'o } 4113f9ae9cf5STheodore Ts'o 4114f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4115f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4116f9ae9cf5STheodore Ts'o if (err) { 4117f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4118f9ae9cf5STheodore Ts'o err); 4119dcf2d804STao Ma goto failed_mount5; 4120c2774d84SAneesh Kumar K.V } 4121c2774d84SAneesh Kumar K.V 4122d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4123d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4124d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4125908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4126908c7f19STejun Heo GFP_KERNEL); 4127d5e03cbbSTheodore Ts'o if (!err) { 4128d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4129d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4130908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4131908c7f19STejun Heo GFP_KERNEL); 4132d5e03cbbSTheodore Ts'o } 4133d5e03cbbSTheodore Ts'o if (!err) 4134d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4135908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4136d5e03cbbSTheodore Ts'o if (!err) 4137908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4138908c7f19STejun Heo GFP_KERNEL); 4139d5e03cbbSTheodore Ts'o if (err) { 4140d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4141d5e03cbbSTheodore Ts'o goto failed_mount6; 4142d5e03cbbSTheodore Ts'o } 4143d5e03cbbSTheodore Ts'o 4144d5e03cbbSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 4145d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4146d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4147d5e03cbbSTheodore Ts'o "unable to initialize " 4148d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4149d5e03cbbSTheodore Ts'o goto failed_mount6; 4150d5e03cbbSTheodore Ts'o } 4151d5e03cbbSTheodore Ts'o 4152bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4153bfff6873SLukas Czerner if (err) 4154dcf2d804STao Ma goto failed_mount6; 4155bfff6873SLukas Czerner 41563197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 41573197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 41583197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 41593197ebdbSTheodore Ts'o "%s", sb->s_id); 4160dcf2d804STao Ma if (err) 4161dcf2d804STao Ma goto failed_mount7; 41623197ebdbSTheodore Ts'o 41639b2ff357SJan Kara #ifdef CONFIG_QUOTA 41649b2ff357SJan Kara /* Enable quota usage during mount. */ 41659b2ff357SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 41669b2ff357SJan Kara !(sb->s_flags & MS_RDONLY)) { 41679b2ff357SJan Kara err = ext4_enable_quotas(sb); 41689b2ff357SJan Kara if (err) 41699b2ff357SJan Kara goto failed_mount8; 41709b2ff357SJan Kara } 41719b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 41729b2ff357SJan Kara 4173617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4174617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4175617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 41760390131bSFrank Mayhar if (needs_recovery) { 4177b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4178617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 41790390131bSFrank Mayhar } 41800390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 41810390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 41820390131bSFrank Mayhar descr = " journalled data mode"; 41830390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 41840390131bSFrank Mayhar descr = " ordered data mode"; 41850390131bSFrank Mayhar else 41860390131bSFrank Mayhar descr = " writeback data mode"; 41870390131bSFrank Mayhar } else 41880390131bSFrank Mayhar descr = "out journal"; 41890390131bSFrank Mayhar 419079add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 419179add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 419279add3a3SLukas Czerner if (!blk_queue_discard(q)) 419379add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 419479add3a3SLukas Czerner "mounting with \"discard\" option, but " 419579add3a3SLukas Czerner "the device does not support discard"); 419679add3a3SLukas Czerner } 419779add3a3SLukas Czerner 4198d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 41998b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 42008b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4201ac27a0ecSDave Kleikamp 420266e61a9eSTheodore Ts'o if (es->s_error_count) 420366e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4204ac27a0ecSDave Kleikamp 4205efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4206efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4207efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4208efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4209efbed4dcSTheodore Ts'o 4210d4c402d9SCurt Wohlgemuth kfree(orig_data); 4211ac27a0ecSDave Kleikamp return 0; 4212ac27a0ecSDave Kleikamp 4213617ba13bSMingming Cao cantfind_ext4: 4214ac27a0ecSDave Kleikamp if (!silent) 4215b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4216ac27a0ecSDave Kleikamp goto failed_mount; 4217ac27a0ecSDave Kleikamp 421872ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 421972ba7450STheodore Ts'o failed_mount8: 422072ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 422172ba7450STheodore Ts'o #endif 4222dcf2d804STao Ma failed_mount7: 4223dcf2d804STao Ma ext4_unregister_li_request(sb); 4224dcf2d804STao Ma failed_mount6: 4225f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4226d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4227d5e03cbbSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 4228d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4229d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4230d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4231d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 423200764937SAzat Khuzhin failed_mount5: 4233f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4234f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4235f9ae9cf5STheodore Ts'o failed_mount4a: 423694bf608aSAl Viro dput(sb->s_root); 423732a9bb57SManish Katiyar sb->s_root = NULL; 423894bf608aSAl Viro failed_mount4: 4239b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 42402e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 42412e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 42424c0425ffSMingming Cao failed_mount_wq: 42430390131bSFrank Mayhar if (sbi->s_journal) { 4244dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 424547b4a50bSJan Kara sbi->s_journal = NULL; 42460390131bSFrank Mayhar } 4247d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4248eb68d0e2SZheng Liu failed_mount3: 42499105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4250c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4251c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4252ac27a0ecSDave Kleikamp failed_mount2: 4253ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4254ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4255f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4256ac27a0ecSDave Kleikamp failed_mount: 42570441984aSDarrick J. Wong if (sbi->s_chksum_driver) 42580441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4259240799cdSTheodore Ts'o if (sbi->s_proc) { 426066acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 42619f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4262240799cdSTheodore Ts'o } 4263ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4264a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4265ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4266ac27a0ecSDave Kleikamp #endif 4267617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4268ac27a0ecSDave Kleikamp brelse(bh); 4269ac27a0ecSDave Kleikamp out_fail: 4270ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4271f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4272ac27a0ecSDave Kleikamp kfree(sbi); 4273dcc7dae3SCyrill Gorcunov out_free_orig: 4274d4c402d9SCurt Wohlgemuth kfree(orig_data); 427507aa2ea1SLukas Czerner return err ? err : ret; 4276ac27a0ecSDave Kleikamp } 4277ac27a0ecSDave Kleikamp 4278ac27a0ecSDave Kleikamp /* 4279ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4280ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4281ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4282ac27a0ecSDave Kleikamp */ 4283617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4284ac27a0ecSDave Kleikamp { 4285617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4286ac27a0ecSDave Kleikamp 4287ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 428830773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 428930773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4290ac27a0ecSDave Kleikamp 4291a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4292ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4293dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4294ac27a0ecSDave Kleikamp else 4295dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 42965bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 42975bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 42985bf5683aSHidehiro Kawai else 42995bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4300a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4301ac27a0ecSDave Kleikamp } 4302ac27a0ecSDave Kleikamp 4303617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4304ac27a0ecSDave Kleikamp unsigned int journal_inum) 4305ac27a0ecSDave Kleikamp { 4306ac27a0ecSDave Kleikamp struct inode *journal_inode; 4307ac27a0ecSDave Kleikamp journal_t *journal; 4308ac27a0ecSDave Kleikamp 43090390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43100390131bSFrank Mayhar 4311ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4312ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4313ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4314ac27a0ecSDave Kleikamp 43151d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43161d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4317b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4318ac27a0ecSDave Kleikamp return NULL; 4319ac27a0ecSDave Kleikamp } 4320ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4321ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4322ac27a0ecSDave Kleikamp iput(journal_inode); 4323b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4324ac27a0ecSDave Kleikamp return NULL; 4325ac27a0ecSDave Kleikamp } 4326ac27a0ecSDave Kleikamp 4327e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4328ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 43291d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4330b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4331ac27a0ecSDave Kleikamp iput(journal_inode); 4332ac27a0ecSDave Kleikamp return NULL; 4333ac27a0ecSDave Kleikamp } 4334ac27a0ecSDave Kleikamp 4335dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4336ac27a0ecSDave Kleikamp if (!journal) { 4337b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4338ac27a0ecSDave Kleikamp iput(journal_inode); 4339ac27a0ecSDave Kleikamp return NULL; 4340ac27a0ecSDave Kleikamp } 4341ac27a0ecSDave Kleikamp journal->j_private = sb; 4342617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4343ac27a0ecSDave Kleikamp return journal; 4344ac27a0ecSDave Kleikamp } 4345ac27a0ecSDave Kleikamp 4346617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4347ac27a0ecSDave Kleikamp dev_t j_dev) 4348ac27a0ecSDave Kleikamp { 4349ac27a0ecSDave Kleikamp struct buffer_head *bh; 4350ac27a0ecSDave Kleikamp journal_t *journal; 4351617ba13bSMingming Cao ext4_fsblk_t start; 4352617ba13bSMingming Cao ext4_fsblk_t len; 4353ac27a0ecSDave Kleikamp int hblock, blocksize; 4354617ba13bSMingming Cao ext4_fsblk_t sb_block; 4355ac27a0ecSDave Kleikamp unsigned long offset; 4356617ba13bSMingming Cao struct ext4_super_block *es; 4357ac27a0ecSDave Kleikamp struct block_device *bdev; 4358ac27a0ecSDave Kleikamp 43590390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43600390131bSFrank Mayhar 4361b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4362ac27a0ecSDave Kleikamp if (bdev == NULL) 4363ac27a0ecSDave Kleikamp return NULL; 4364ac27a0ecSDave Kleikamp 4365ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4366e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4367ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4368b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4369b31e1552SEric Sandeen "blocksize too small for journal device"); 4370ac27a0ecSDave Kleikamp goto out_bdev; 4371ac27a0ecSDave Kleikamp } 4372ac27a0ecSDave Kleikamp 4373617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4374617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4375ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4376ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4377b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4378b31e1552SEric Sandeen "external journal"); 4379ac27a0ecSDave Kleikamp goto out_bdev; 4380ac27a0ecSDave Kleikamp } 4381ac27a0ecSDave Kleikamp 43822716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4383617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4384ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4385617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4386b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4387b31e1552SEric Sandeen "bad superblock"); 4388ac27a0ecSDave Kleikamp brelse(bh); 4389ac27a0ecSDave Kleikamp goto out_bdev; 4390ac27a0ecSDave Kleikamp } 4391ac27a0ecSDave Kleikamp 4392df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4393df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4394df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4395df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4396df4763beSDarrick J. Wong "corrupt superblock"); 4397df4763beSDarrick J. Wong brelse(bh); 4398df4763beSDarrick J. Wong goto out_bdev; 4399df4763beSDarrick J. Wong } 4400df4763beSDarrick J. Wong 4401617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4402b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4403ac27a0ecSDave Kleikamp brelse(bh); 4404ac27a0ecSDave Kleikamp goto out_bdev; 4405ac27a0ecSDave Kleikamp } 4406ac27a0ecSDave Kleikamp 4407bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4408ac27a0ecSDave Kleikamp start = sb_block + 1; 4409ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4410ac27a0ecSDave Kleikamp 4411dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4412ac27a0ecSDave Kleikamp start, len, blocksize); 4413ac27a0ecSDave Kleikamp if (!journal) { 4414b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4415ac27a0ecSDave Kleikamp goto out_bdev; 4416ac27a0ecSDave Kleikamp } 4417ac27a0ecSDave Kleikamp journal->j_private = sb; 44189f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4419ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4420ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4421b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4422ac27a0ecSDave Kleikamp goto out_journal; 4423ac27a0ecSDave Kleikamp } 4424ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4425b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4426b31e1552SEric Sandeen "user (unsupported) - %d", 4427ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4428ac27a0ecSDave Kleikamp goto out_journal; 4429ac27a0ecSDave Kleikamp } 4430617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4431617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4432ac27a0ecSDave Kleikamp return journal; 44330b8e58a1SAndreas Dilger 4434ac27a0ecSDave Kleikamp out_journal: 4435dab291afSMingming Cao jbd2_journal_destroy(journal); 4436ac27a0ecSDave Kleikamp out_bdev: 4437617ba13bSMingming Cao ext4_blkdev_put(bdev); 4438ac27a0ecSDave Kleikamp return NULL; 4439ac27a0ecSDave Kleikamp } 4440ac27a0ecSDave Kleikamp 4441617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4442617ba13bSMingming Cao struct ext4_super_block *es, 4443ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4444ac27a0ecSDave Kleikamp { 4445ac27a0ecSDave Kleikamp journal_t *journal; 4446ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4447ac27a0ecSDave Kleikamp dev_t journal_dev; 4448ac27a0ecSDave Kleikamp int err = 0; 4449ac27a0ecSDave Kleikamp int really_read_only; 4450ac27a0ecSDave Kleikamp 44510390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44520390131bSFrank Mayhar 4453ac27a0ecSDave Kleikamp if (journal_devnum && 4454ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4455b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4456b31e1552SEric Sandeen "numbers have changed"); 4457ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4458ac27a0ecSDave Kleikamp } else 4459ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4460ac27a0ecSDave Kleikamp 4461ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4462ac27a0ecSDave Kleikamp 4463ac27a0ecSDave Kleikamp /* 4464ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4465ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4466ac27a0ecSDave Kleikamp * can get read-write access to the device. 4467ac27a0ecSDave Kleikamp */ 4468617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4469ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4470b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4471b31e1552SEric Sandeen "required on readonly filesystem"); 4472ac27a0ecSDave Kleikamp if (really_read_only) { 4473b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4474b31e1552SEric Sandeen "unavailable, cannot proceed"); 4475ac27a0ecSDave Kleikamp return -EROFS; 4476ac27a0ecSDave Kleikamp } 4477b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4478b31e1552SEric Sandeen "be enabled during recovery"); 4479ac27a0ecSDave Kleikamp } 4480ac27a0ecSDave Kleikamp } 4481ac27a0ecSDave Kleikamp 4482ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4483b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4484b31e1552SEric Sandeen "and inode journals!"); 4485ac27a0ecSDave Kleikamp return -EINVAL; 4486ac27a0ecSDave Kleikamp } 4487ac27a0ecSDave Kleikamp 4488ac27a0ecSDave Kleikamp if (journal_inum) { 4489617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4490ac27a0ecSDave Kleikamp return -EINVAL; 4491ac27a0ecSDave Kleikamp } else { 4492617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4493ac27a0ecSDave Kleikamp return -EINVAL; 4494ac27a0ecSDave Kleikamp } 4495ac27a0ecSDave Kleikamp 449690576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4497b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 44984776004fSTheodore Ts'o 4499617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4500dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 45011c13d5c0STheodore Ts'o if (!err) { 45021c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 45031c13d5c0STheodore Ts'o if (save) 45041c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 45051c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4506dab291afSMingming Cao err = jbd2_journal_load(journal); 45071c13d5c0STheodore Ts'o if (save) 45081c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 45091c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 45101c13d5c0STheodore Ts'o kfree(save); 45111c13d5c0STheodore Ts'o } 4512ac27a0ecSDave Kleikamp 4513ac27a0ecSDave Kleikamp if (err) { 4514b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4515dab291afSMingming Cao jbd2_journal_destroy(journal); 4516ac27a0ecSDave Kleikamp return err; 4517ac27a0ecSDave Kleikamp } 4518ac27a0ecSDave Kleikamp 4519617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4520617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4521ac27a0ecSDave Kleikamp 4522c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4523ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4524ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4525ac27a0ecSDave Kleikamp 4526ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4527e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4528ac27a0ecSDave Kleikamp } 4529ac27a0ecSDave Kleikamp 4530ac27a0ecSDave Kleikamp return 0; 4531ac27a0ecSDave Kleikamp } 4532ac27a0ecSDave Kleikamp 4533e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4534ac27a0ecSDave Kleikamp { 4535e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4536617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4537c4be0c1dSTakashi Sato int error = 0; 4538ac27a0ecSDave Kleikamp 45397c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4540c4be0c1dSTakashi Sato return error; 4541914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4542914258bfSTheodore Ts'o /* 4543914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4544914258bfSTheodore Ts'o * superblock failed. This could happen because the 4545914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4546914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4547914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4548914258bfSTheodore Ts'o * write and hope for the best. 4549914258bfSTheodore Ts'o */ 4550b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4551b31e1552SEric Sandeen "superblock detected"); 4552914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4553914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4554914258bfSTheodore Ts'o } 455571290b36STheodore Ts'o /* 455671290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 455771290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 455871290b36STheodore Ts'o * write time when we are mounting the root file system 455971290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 456071290b36STheodore Ts'o * for people who are east of GMT and who make their clock 456171290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 456271290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 456371290b36STheodore Ts'o * to complain and force a full file system check. 456471290b36STheodore Ts'o */ 456571290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4566ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4567f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4568afc32f7eSTheodore Ts'o es->s_kbytes_written = 4569afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4570afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4571afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4572f613dfcbSTheodore Ts'o else 4573f613dfcbSTheodore Ts'o es->s_kbytes_written = 4574f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4575d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 457657042651STheodore Ts'o ext4_free_blocks_count_set(es, 457757042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 457857042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4579d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 45807f93cff9STheodore Ts'o es->s_free_inodes_count = 45817f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 45825d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4583ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 458406db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4585ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4586914258bfSTheodore Ts'o if (sync) { 4587c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4588c4be0c1dSTakashi Sato if (error) 4589c4be0c1dSTakashi Sato return error; 4590c4be0c1dSTakashi Sato 4591c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4592c4be0c1dSTakashi Sato if (error) { 4593b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4594b31e1552SEric Sandeen "superblock"); 4595914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4596914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4597914258bfSTheodore Ts'o } 4598914258bfSTheodore Ts'o } 4599c4be0c1dSTakashi Sato return error; 4600ac27a0ecSDave Kleikamp } 4601ac27a0ecSDave Kleikamp 4602ac27a0ecSDave Kleikamp /* 4603ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4604ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4605ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4606ac27a0ecSDave Kleikamp */ 4607617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4608617ba13bSMingming Cao struct ext4_super_block *es) 4609ac27a0ecSDave Kleikamp { 4610617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4611ac27a0ecSDave Kleikamp 46120390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 46130390131bSFrank Mayhar BUG_ON(journal != NULL); 46140390131bSFrank Mayhar return; 46150390131bSFrank Mayhar } 4616dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46177ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 46187ffe1ea8SHidehiro Kawai goto out; 46197ffe1ea8SHidehiro Kawai 4620617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4621ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4622617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4623e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4624ac27a0ecSDave Kleikamp } 46257ffe1ea8SHidehiro Kawai 46267ffe1ea8SHidehiro Kawai out: 4627dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4628ac27a0ecSDave Kleikamp } 4629ac27a0ecSDave Kleikamp 4630ac27a0ecSDave Kleikamp /* 4631ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4632ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4633ac27a0ecSDave Kleikamp * main filesystem now. 4634ac27a0ecSDave Kleikamp */ 4635617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4636617ba13bSMingming Cao struct ext4_super_block *es) 4637ac27a0ecSDave Kleikamp { 4638ac27a0ecSDave Kleikamp journal_t *journal; 4639ac27a0ecSDave Kleikamp int j_errno; 4640ac27a0ecSDave Kleikamp const char *errstr; 4641ac27a0ecSDave Kleikamp 46420390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 46430390131bSFrank Mayhar 4644617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4645ac27a0ecSDave Kleikamp 4646ac27a0ecSDave Kleikamp /* 4647ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4648617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4649ac27a0ecSDave Kleikamp */ 4650ac27a0ecSDave Kleikamp 4651dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4652ac27a0ecSDave Kleikamp if (j_errno) { 4653ac27a0ecSDave Kleikamp char nbuf[16]; 4654ac27a0ecSDave Kleikamp 4655617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 465612062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4657ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 465812062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4659ac27a0ecSDave Kleikamp 4660617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4661617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4662e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4663ac27a0ecSDave Kleikamp 4664dab291afSMingming Cao jbd2_journal_clear_err(journal); 4665d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4666ac27a0ecSDave Kleikamp } 4667ac27a0ecSDave Kleikamp } 4668ac27a0ecSDave Kleikamp 4669ac27a0ecSDave Kleikamp /* 4670ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4671ac27a0ecSDave Kleikamp * and wait on the commit. 4672ac27a0ecSDave Kleikamp */ 4673617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4674ac27a0ecSDave Kleikamp { 4675ac27a0ecSDave Kleikamp journal_t *journal; 4676ac27a0ecSDave Kleikamp 4677ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4678ac27a0ecSDave Kleikamp return 0; 4679ac27a0ecSDave Kleikamp 4680617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4681b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4682ac27a0ecSDave Kleikamp } 4683ac27a0ecSDave Kleikamp 4684617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4685ac27a0ecSDave Kleikamp { 468614ce0cb4STheodore Ts'o int ret = 0; 46879eddacf9SJan Kara tid_t target; 468806a407f1SDmitry Monakhov bool needs_barrier = false; 46898d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4690ac27a0ecSDave Kleikamp 46919bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 46922e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4693a1177825SJan Kara /* 4694a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4695a1177825SJan Kara * no dirty dquots 4696a1177825SJan Kara */ 4697a1177825SJan Kara dquot_writeback_dquots(sb, -1); 469806a407f1SDmitry Monakhov /* 469906a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 470006a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 470106a407f1SDmitry Monakhov * transaction_commit will do it for us. 470206a407f1SDmitry Monakhov */ 4703bda32530STheodore Ts'o if (sbi->s_journal) { 470406a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 470506a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 470606a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 470706a407f1SDmitry Monakhov needs_barrier = true; 470806a407f1SDmitry Monakhov 47098d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4710ac27a0ecSDave Kleikamp if (wait) 4711bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4712bda32530STheodore Ts'o target); 47130390131bSFrank Mayhar } 4714bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4715bda32530STheodore Ts'o needs_barrier = true; 471606a407f1SDmitry Monakhov if (needs_barrier) { 471706a407f1SDmitry Monakhov int err; 471806a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 471906a407f1SDmitry Monakhov if (!ret) 472006a407f1SDmitry Monakhov ret = err; 472106a407f1SDmitry Monakhov } 472206a407f1SDmitry Monakhov 472306a407f1SDmitry Monakhov return ret; 472406a407f1SDmitry Monakhov } 472506a407f1SDmitry Monakhov 4726ac27a0ecSDave Kleikamp /* 4727ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4728ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4729be4f27d3SYongqiang Yang * 4730be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 47318e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 47328e8ad8a5SJan Kara * modifications. 4733ac27a0ecSDave Kleikamp */ 4734c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4735ac27a0ecSDave Kleikamp { 4736c4be0c1dSTakashi Sato int error = 0; 4737c4be0c1dSTakashi Sato journal_t *journal; 4738ac27a0ecSDave Kleikamp 47399ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47409ca92389STheodore Ts'o return 0; 47419ca92389STheodore Ts'o 4742c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4743ac27a0ecSDave Kleikamp 4744bb044576STheodore Ts'o if (journal) { 4745ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4746dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47477ffe1ea8SHidehiro Kawai 47487ffe1ea8SHidehiro Kawai /* 4749bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4750bb044576STheodore Ts'o * flush the journal. 47517ffe1ea8SHidehiro Kawai */ 4752c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 47536b0310fbSEric Sandeen if (error < 0) 47546b0310fbSEric Sandeen goto out; 4755bb044576STheodore Ts'o } 4756ac27a0ecSDave Kleikamp 4757ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4758617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4759e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 47606b0310fbSEric Sandeen out: 4761bb044576STheodore Ts'o if (journal) 47628e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4763bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 47646b0310fbSEric Sandeen return error; 4765ac27a0ecSDave Kleikamp } 4766ac27a0ecSDave Kleikamp 4767ac27a0ecSDave Kleikamp /* 4768ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4769ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4770ac27a0ecSDave Kleikamp */ 4771c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4772ac27a0ecSDave Kleikamp { 47739ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47749ca92389STheodore Ts'o return 0; 47759ca92389STheodore Ts'o 47769ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4777617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4778e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4779c4be0c1dSTakashi Sato return 0; 4780ac27a0ecSDave Kleikamp } 4781ac27a0ecSDave Kleikamp 4782673c6100STheodore Ts'o /* 4783673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4784673c6100STheodore Ts'o */ 4785673c6100STheodore Ts'o struct ext4_mount_options { 4786673c6100STheodore Ts'o unsigned long s_mount_opt; 4787a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 478808cefc7aSEric W. Biederman kuid_t s_resuid; 478908cefc7aSEric W. Biederman kgid_t s_resgid; 4790673c6100STheodore Ts'o unsigned long s_commit_interval; 4791673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4792673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4793673c6100STheodore Ts'o int s_jquota_fmt; 4794a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4795673c6100STheodore Ts'o #endif 4796673c6100STheodore Ts'o }; 4797673c6100STheodore Ts'o 4798617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4799ac27a0ecSDave Kleikamp { 4800617ba13bSMingming Cao struct ext4_super_block *es; 4801617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4802ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4803617ba13bSMingming Cao struct ext4_mount_options old_opts; 4804c79d967dSChristoph Hellwig int enable_quota = 0; 48058a266467STheodore Ts'o ext4_group_t g; 4806b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4807c5e06d10SJohann Lombardi int err = 0; 4808ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 480903dafb5fSChen Gang int i, j; 4810ac27a0ecSDave Kleikamp #endif 4811d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4812ac27a0ecSDave Kleikamp 4813ac27a0ecSDave Kleikamp /* Store the original options */ 4814ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4815ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4816a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4817ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4818ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4819ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 482030773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 482130773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4822ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4823ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4824a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 482503dafb5fSChen Gang if (sbi->s_qf_names[i]) { 482603dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 482703dafb5fSChen Gang GFP_KERNEL); 482803dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 482903dafb5fSChen Gang for (j = 0; j < i; j++) 483003dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 48313e36a163SWei Yongjun kfree(orig_data); 483203dafb5fSChen Gang return -ENOMEM; 483303dafb5fSChen Gang } 483403dafb5fSChen Gang } else 483503dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4836ac27a0ecSDave Kleikamp #endif 4837b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4838b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4839ac27a0ecSDave Kleikamp 4840ac27a0ecSDave Kleikamp /* 4841ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4842ac27a0ecSDave Kleikamp */ 4843661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4844ac27a0ecSDave Kleikamp err = -EINVAL; 4845ac27a0ecSDave Kleikamp goto restore_opts; 4846ac27a0ecSDave Kleikamp } 4847ac27a0ecSDave Kleikamp 4848*6b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 4849*6b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 4850*6b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 4851*6b992ff2SDarrick J. Wong "during remount not supported"); 4852*6b992ff2SDarrick J. Wong err = -EINVAL; 4853*6b992ff2SDarrick J. Wong goto restore_opts; 4854*6b992ff2SDarrick J. Wong } 4855*6b992ff2SDarrick J. Wong 48566ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 48576ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 48586ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48596ae6514bSPiotr Sarna "both data=journal and delalloc"); 48606ae6514bSPiotr Sarna err = -EINVAL; 48616ae6514bSPiotr Sarna goto restore_opts; 48626ae6514bSPiotr Sarna } 48636ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 48646ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48656ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 48666ae6514bSPiotr Sarna err = -EINVAL; 48676ae6514bSPiotr Sarna goto restore_opts; 48686ae6514bSPiotr Sarna } 48696ae6514bSPiotr Sarna } 48706ae6514bSPiotr Sarna 48714ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4872c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4873ac27a0ecSDave Kleikamp 4874ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4875482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4876ac27a0ecSDave Kleikamp 4877ac27a0ecSDave Kleikamp es = sbi->s_es; 4878ac27a0ecSDave Kleikamp 4879b3881f74STheodore Ts'o if (sbi->s_journal) { 4880617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4881b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4882b3881f74STheodore Ts'o } 4883ac27a0ecSDave Kleikamp 4884661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 48854ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4886ac27a0ecSDave Kleikamp err = -EROFS; 4887ac27a0ecSDave Kleikamp goto restore_opts; 4888ac27a0ecSDave Kleikamp } 4889ac27a0ecSDave Kleikamp 4890ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 489138c03b34STheodore Ts'o err = sync_filesystem(sb); 489238c03b34STheodore Ts'o if (err < 0) 489338c03b34STheodore Ts'o goto restore_opts; 48940f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 48950f0dd62fSChristoph Hellwig if (err < 0) 4896c79d967dSChristoph Hellwig goto restore_opts; 4897c79d967dSChristoph Hellwig 4898ac27a0ecSDave Kleikamp /* 4899ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4900ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4901ac27a0ecSDave Kleikamp */ 4902ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4903ac27a0ecSDave Kleikamp 4904ac27a0ecSDave Kleikamp /* 4905ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4906ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4907ac27a0ecSDave Kleikamp * mark the partition as valid again. 4908ac27a0ecSDave Kleikamp */ 4909617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4910617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4911ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4912ac27a0ecSDave Kleikamp 4913a63c9eb2STheodore Ts'o if (sbi->s_journal) 4914617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4915ac27a0ecSDave Kleikamp } else { 4916a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4917a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4918ac27a0ecSDave Kleikamp err = -EROFS; 4919ac27a0ecSDave Kleikamp goto restore_opts; 4920ac27a0ecSDave Kleikamp } 4921ead6596bSEric Sandeen /* 49228a266467STheodore Ts'o * Make sure the group descriptor checksums 49230b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 49248a266467STheodore Ts'o */ 49258a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 49268a266467STheodore Ts'o struct ext4_group_desc *gdp = 49278a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 49288a266467STheodore Ts'o 4929feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4930b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4931b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 49328a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 49338a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 49348a266467STheodore Ts'o err = -EINVAL; 49358a266467STheodore Ts'o goto restore_opts; 49368a266467STheodore Ts'o } 49378a266467STheodore Ts'o } 49388a266467STheodore Ts'o 49398a266467STheodore Ts'o /* 4940ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4941ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4942ead6596bSEric Sandeen * require a full umount/remount for now. 4943ead6596bSEric Sandeen */ 4944ead6596bSEric Sandeen if (es->s_last_orphan) { 4945b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4946ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4947ead6596bSEric Sandeen "orphan inode list. Please " 4948b31e1552SEric Sandeen "umount/remount instead"); 4949ead6596bSEric Sandeen err = -EINVAL; 4950ead6596bSEric Sandeen goto restore_opts; 4951ead6596bSEric Sandeen } 4952ead6596bSEric Sandeen 4953ac27a0ecSDave Kleikamp /* 4954ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4955ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4956ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4957ac27a0ecSDave Kleikamp * the partition.) 4958ac27a0ecSDave Kleikamp */ 49590390131bSFrank Mayhar if (sbi->s_journal) 4960617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4961ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4962617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4963ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4964c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4965c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4966c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4967c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4968c5e06d10SJohann Lombardi err = -EROFS; 4969c5e06d10SJohann Lombardi goto restore_opts; 4970c5e06d10SJohann Lombardi } 4971c79d967dSChristoph Hellwig enable_quota = 1; 4972ac27a0ecSDave Kleikamp } 4973ac27a0ecSDave Kleikamp } 4974bfff6873SLukas Czerner 4975bfff6873SLukas Czerner /* 4976bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4977bfff6873SLukas Czerner * current settings 4978bfff6873SLukas Czerner */ 4979bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4980bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4981bfff6873SLukas Czerner else { 4982bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4983bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4984bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4985bfff6873SLukas Czerner } 4986bfff6873SLukas Czerner 49876fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4988d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 4989e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 49900390131bSFrank Mayhar 4991ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4992ac27a0ecSDave Kleikamp /* Release old quota file names */ 4993a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4994ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 49957c319d32SAditya Kali if (enable_quota) { 49967c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 49970f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 49987c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 49997c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 50007c319d32SAditya Kali err = ext4_enable_quotas(sb); 500107724f98STheodore Ts'o if (err) 50027c319d32SAditya Kali goto restore_opts; 50037c319d32SAditya Kali } 50047c319d32SAditya Kali } 50057c319d32SAditya Kali #endif 5006d4c402d9SCurt Wohlgemuth 5007d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5008d4c402d9SCurt Wohlgemuth kfree(orig_data); 5009ac27a0ecSDave Kleikamp return 0; 50100b8e58a1SAndreas Dilger 5011ac27a0ecSDave Kleikamp restore_opts: 5012ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5013ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5014a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5015ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5016ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5017ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 501830773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 501930773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5020ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5021ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5022a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5023ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5024ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5025ac27a0ecSDave Kleikamp } 5026ac27a0ecSDave Kleikamp #endif 5027d4c402d9SCurt Wohlgemuth kfree(orig_data); 5028ac27a0ecSDave Kleikamp return err; 5029ac27a0ecSDave Kleikamp } 5030ac27a0ecSDave Kleikamp 5031617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5032ac27a0ecSDave Kleikamp { 5033ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5034617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5035617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 503627dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5037960cc398SPekka Enberg u64 fsid; 5038d02a9391SKazuya Mio s64 bfree; 503927dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5040ac27a0ecSDave Kleikamp 5041952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5042952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5043ac27a0ecSDave Kleikamp 5044617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5045ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5046b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 504757042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 504857042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5049d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 505057042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 505127dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 505227dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 505327dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5054ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5055ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 505652d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5057617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5058960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5059960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5060960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5061960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 50620b8e58a1SAndreas Dilger 5063ac27a0ecSDave Kleikamp return 0; 5064ac27a0ecSDave Kleikamp } 5065ac27a0ecSDave Kleikamp 50660b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 50670b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5068ac27a0ecSDave Kleikamp * Process 1 Process 2 5069617ba13bSMingming Cao * ext4_create() quota_sync() 5070dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5071871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5072dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5073ac27a0ecSDave Kleikamp * 5074ac27a0ecSDave Kleikamp */ 5075ac27a0ecSDave Kleikamp 5076ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5077ac27a0ecSDave Kleikamp 5078ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5079ac27a0ecSDave Kleikamp { 50804c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5081ac27a0ecSDave Kleikamp } 5082ac27a0ecSDave Kleikamp 5083617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5084ac27a0ecSDave Kleikamp { 5085ac27a0ecSDave Kleikamp int ret, err; 5086ac27a0ecSDave Kleikamp handle_t *handle; 5087ac27a0ecSDave Kleikamp struct inode *inode; 5088ac27a0ecSDave Kleikamp 5089ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 50909924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5091617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5092ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5093ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5094ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5095617ba13bSMingming Cao err = ext4_journal_stop(handle); 5096ac27a0ecSDave Kleikamp if (!ret) 5097ac27a0ecSDave Kleikamp ret = err; 5098ac27a0ecSDave Kleikamp return ret; 5099ac27a0ecSDave Kleikamp } 5100ac27a0ecSDave Kleikamp 5101617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5102ac27a0ecSDave Kleikamp { 5103ac27a0ecSDave Kleikamp int ret, err; 5104ac27a0ecSDave Kleikamp handle_t *handle; 5105ac27a0ecSDave Kleikamp 51069924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5107617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5108ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5109ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5110ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5111617ba13bSMingming Cao err = ext4_journal_stop(handle); 5112ac27a0ecSDave Kleikamp if (!ret) 5113ac27a0ecSDave Kleikamp ret = err; 5114ac27a0ecSDave Kleikamp return ret; 5115ac27a0ecSDave Kleikamp } 5116ac27a0ecSDave Kleikamp 5117617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5118ac27a0ecSDave Kleikamp { 5119ac27a0ecSDave Kleikamp int ret, err; 5120ac27a0ecSDave Kleikamp handle_t *handle; 5121ac27a0ecSDave Kleikamp 51229924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5123617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 51249c3013e9SJan Kara if (IS_ERR(handle)) { 51259c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 51269c3013e9SJan Kara dquot_release(dquot); 5127ac27a0ecSDave Kleikamp return PTR_ERR(handle); 51289c3013e9SJan Kara } 5129ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5130617ba13bSMingming Cao err = ext4_journal_stop(handle); 5131ac27a0ecSDave Kleikamp if (!ret) 5132ac27a0ecSDave Kleikamp ret = err; 5133ac27a0ecSDave Kleikamp return ret; 5134ac27a0ecSDave Kleikamp } 5135ac27a0ecSDave Kleikamp 5136617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5137ac27a0ecSDave Kleikamp { 5138262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5139262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5140262b4662SJan Kara 51412c8be6b2SJan Kara /* Are we journaling quotas? */ 5142262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 5143262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5144ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5145617ba13bSMingming Cao return ext4_write_dquot(dquot); 5146ac27a0ecSDave Kleikamp } else { 5147ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5148ac27a0ecSDave Kleikamp } 5149ac27a0ecSDave Kleikamp } 5150ac27a0ecSDave Kleikamp 5151617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5152ac27a0ecSDave Kleikamp { 5153ac27a0ecSDave Kleikamp int ret, err; 5154ac27a0ecSDave Kleikamp handle_t *handle; 5155ac27a0ecSDave Kleikamp 5156ac27a0ecSDave Kleikamp /* Data block + inode block */ 51579924a92aSTheodore Ts'o handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); 5158ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5159ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5160ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5161617ba13bSMingming Cao err = ext4_journal_stop(handle); 5162ac27a0ecSDave Kleikamp if (!ret) 5163ac27a0ecSDave Kleikamp ret = err; 5164ac27a0ecSDave Kleikamp return ret; 5165ac27a0ecSDave Kleikamp } 5166ac27a0ecSDave Kleikamp 5167ac27a0ecSDave Kleikamp /* 5168ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5169ac27a0ecSDave Kleikamp * the quota file and such... 5170ac27a0ecSDave Kleikamp */ 5171617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5172ac27a0ecSDave Kleikamp { 5173287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5174617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5175ac27a0ecSDave Kleikamp } 5176ac27a0ecSDave Kleikamp 5177ac27a0ecSDave Kleikamp /* 5178ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5179ac27a0ecSDave Kleikamp */ 5180617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5181f00c9e44SJan Kara struct path *path) 5182ac27a0ecSDave Kleikamp { 5183ac27a0ecSDave Kleikamp int err; 5184ac27a0ecSDave Kleikamp 5185ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5186ac27a0ecSDave Kleikamp return -EINVAL; 51870623543bSJan Kara 5188ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5189d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5190ac27a0ecSDave Kleikamp return -EXDEV; 51910623543bSJan Kara /* Journaling quota? */ 51920623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 51932b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5194f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5195b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5196b31e1552SEric Sandeen "Quota file not on filesystem root. " 5197b31e1552SEric Sandeen "Journaled quota will not work"); 51980623543bSJan Kara } 51990623543bSJan Kara 52000623543bSJan Kara /* 52010623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 52020623543bSJan Kara * all updates to the file when we bypass pagecache... 52030623543bSJan Kara */ 52040390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 5205f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 52060623543bSJan Kara /* 52070623543bSJan Kara * We don't need to lock updates but journal_flush() could 52080623543bSJan Kara * otherwise be livelocked... 52090623543bSJan Kara */ 52100623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 52117ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 52120623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5213f00c9e44SJan Kara if (err) 52147ffe1ea8SHidehiro Kawai return err; 52157ffe1ea8SHidehiro Kawai } 52160623543bSJan Kara 5217f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5218ac27a0ecSDave Kleikamp } 5219ac27a0ecSDave Kleikamp 52207c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 52217c319d32SAditya Kali unsigned int flags) 52227c319d32SAditya Kali { 52237c319d32SAditya Kali int err; 52247c319d32SAditya Kali struct inode *qf_inode; 5225a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52267c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52277c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52287c319d32SAditya Kali }; 52297c319d32SAditya Kali 52307c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 52317c319d32SAditya Kali 52327c319d32SAditya Kali if (!qf_inums[type]) 52337c319d32SAditya Kali return -EPERM; 52347c319d32SAditya Kali 52357c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 52367c319d32SAditya Kali if (IS_ERR(qf_inode)) { 52377c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 52387c319d32SAditya Kali return PTR_ERR(qf_inode); 52397c319d32SAditya Kali } 52407c319d32SAditya Kali 5241bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5242bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 52437c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 52447c319d32SAditya Kali iput(qf_inode); 52457c319d32SAditya Kali 52467c319d32SAditya Kali return err; 52477c319d32SAditya Kali } 52487c319d32SAditya Kali 52497c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 52507c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 52517c319d32SAditya Kali { 52527c319d32SAditya Kali int type, err = 0; 5253a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52547c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52557c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52567c319d32SAditya Kali }; 52577c319d32SAditya Kali 52587c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5259a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 52607c319d32SAditya Kali if (qf_inums[type]) { 52617c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 52627c319d32SAditya Kali DQUOT_USAGE_ENABLED); 52637c319d32SAditya Kali if (err) { 52647c319d32SAditya Kali ext4_warning(sb, 526572ba7450STheodore Ts'o "Failed to enable quota tracking " 526672ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 526772ba7450STheodore Ts'o "e2fsck to fix.", type, err); 52687c319d32SAditya Kali return err; 52697c319d32SAditya Kali } 52707c319d32SAditya Kali } 52717c319d32SAditya Kali } 52727c319d32SAditya Kali return 0; 52737c319d32SAditya Kali } 52747c319d32SAditya Kali 52757c319d32SAditya Kali /* 52767c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 52777c319d32SAditya Kali */ 52787c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 52797c319d32SAditya Kali int format_id) 52807c319d32SAditya Kali { 52817c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 52827c319d32SAditya Kali return -EINVAL; 52837c319d32SAditya Kali 52847c319d32SAditya Kali /* 52857c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 52867c319d32SAditya Kali */ 52877c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 52887c319d32SAditya Kali } 52897c319d32SAditya Kali 5290ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5291ca0e05e4SDmitry Monakhov { 529221f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 529321f97697SJan Kara handle_t *handle; 529421f97697SJan Kara 529587009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 529687009d86SDmitry Monakhov * Caller already holds s_umount sem */ 529787009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5298ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5299ca0e05e4SDmitry Monakhov 53000b268590SAmir Goldstein if (!inode) 53010b268590SAmir Goldstein goto out; 53020b268590SAmir Goldstein 530321f97697SJan Kara /* Update modification times of quota files when userspace can 530421f97697SJan Kara * start looking at them */ 53059924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 530621f97697SJan Kara if (IS_ERR(handle)) 530721f97697SJan Kara goto out; 530821f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 530921f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 531021f97697SJan Kara ext4_journal_stop(handle); 531121f97697SJan Kara 531221f97697SJan Kara out: 5313ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5314ca0e05e4SDmitry Monakhov } 5315ca0e05e4SDmitry Monakhov 53167c319d32SAditya Kali /* 53177c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 53187c319d32SAditya Kali */ 53197c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 53207c319d32SAditya Kali { 53217c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 53227c319d32SAditya Kali return -EINVAL; 53237c319d32SAditya Kali 53247c319d32SAditya Kali /* Disable only the limits. */ 53257c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 53267c319d32SAditya Kali } 53277c319d32SAditya Kali 5328ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5329ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5330ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5331ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5332617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5333ac27a0ecSDave Kleikamp size_t len, loff_t off) 5334ac27a0ecSDave Kleikamp { 5335ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5336725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5337ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5338ac27a0ecSDave Kleikamp int tocopy; 5339ac27a0ecSDave Kleikamp size_t toread; 5340ac27a0ecSDave Kleikamp struct buffer_head *bh; 5341ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5342ac27a0ecSDave Kleikamp 5343ac27a0ecSDave Kleikamp if (off > i_size) 5344ac27a0ecSDave Kleikamp return 0; 5345ac27a0ecSDave Kleikamp if (off+len > i_size) 5346ac27a0ecSDave Kleikamp len = i_size-off; 5347ac27a0ecSDave Kleikamp toread = len; 5348ac27a0ecSDave Kleikamp while (toread > 0) { 5349ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5350ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 53511c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 53521c215028STheodore Ts'o if (IS_ERR(bh)) 53531c215028STheodore Ts'o return PTR_ERR(bh); 5354ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5355ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5356ac27a0ecSDave Kleikamp else 5357ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5358ac27a0ecSDave Kleikamp brelse(bh); 5359ac27a0ecSDave Kleikamp offset = 0; 5360ac27a0ecSDave Kleikamp toread -= tocopy; 5361ac27a0ecSDave Kleikamp data += tocopy; 5362ac27a0ecSDave Kleikamp blk++; 5363ac27a0ecSDave Kleikamp } 5364ac27a0ecSDave Kleikamp return len; 5365ac27a0ecSDave Kleikamp } 5366ac27a0ecSDave Kleikamp 5367ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5368ac27a0ecSDave Kleikamp * enough credits) */ 5369617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5370ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5371ac27a0ecSDave Kleikamp { 5372ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5373725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 53741c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5375ac27a0ecSDave Kleikamp struct buffer_head *bh; 5376ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5377ac27a0ecSDave Kleikamp 53780390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5379b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5380b31e1552SEric Sandeen " cancelled because transaction is not started", 53819c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 53829c3013e9SJan Kara return -EIO; 53839c3013e9SJan Kara } 538467eeb568SDmitry Monakhov /* 538567eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 538667eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 538767eeb568SDmitry Monakhov */ 538867eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 538967eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 539067eeb568SDmitry Monakhov " cancelled because not block aligned", 539167eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 539267eeb568SDmitry Monakhov return -EIO; 539367eeb568SDmitry Monakhov } 539467eeb568SDmitry Monakhov 53951c215028STheodore Ts'o bh = ext4_bread(handle, inode, blk, 1); 53961c215028STheodore Ts'o if (IS_ERR(bh)) 53971c215028STheodore Ts'o return PTR_ERR(bh); 5398ac27a0ecSDave Kleikamp if (!bh) 5399ac27a0ecSDave Kleikamp goto out; 54005d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5401617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5402ac27a0ecSDave Kleikamp if (err) { 5403ac27a0ecSDave Kleikamp brelse(bh); 54041c215028STheodore Ts'o return err; 5405ac27a0ecSDave Kleikamp } 5406ac27a0ecSDave Kleikamp lock_buffer(bh); 540767eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5408ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5409ac27a0ecSDave Kleikamp unlock_buffer(bh); 54100390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5411ac27a0ecSDave Kleikamp brelse(bh); 5412ac27a0ecSDave Kleikamp out: 541367eeb568SDmitry Monakhov if (inode->i_size < off + len) { 541467eeb568SDmitry Monakhov i_size_write(inode, off + len); 5415617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5416617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 541721f97697SJan Kara } 541867eeb568SDmitry Monakhov return len; 5419ac27a0ecSDave Kleikamp } 5420ac27a0ecSDave Kleikamp 5421ac27a0ecSDave Kleikamp #endif 5422ac27a0ecSDave Kleikamp 5423152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5424152a0836SAl Viro const char *dev_name, void *data) 5425ac27a0ecSDave Kleikamp { 5426152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5427ac27a0ecSDave Kleikamp } 5428ac27a0ecSDave Kleikamp 542937f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 543024b58424STheodore Ts'o static inline void register_as_ext2(void) 543124b58424STheodore Ts'o { 543224b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 543324b58424STheodore Ts'o if (err) 543424b58424STheodore Ts'o printk(KERN_WARNING 543524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 543624b58424STheodore Ts'o } 543724b58424STheodore Ts'o 543824b58424STheodore Ts'o static inline void unregister_as_ext2(void) 543924b58424STheodore Ts'o { 544024b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 544124b58424STheodore Ts'o } 54422035e776STheodore Ts'o 54432035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 54442035e776STheodore Ts'o { 54452035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 54462035e776STheodore Ts'o return 0; 54472035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54482035e776STheodore Ts'o return 1; 54492035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 54502035e776STheodore Ts'o return 0; 54512035e776STheodore Ts'o return 1; 54522035e776STheodore Ts'o } 545324b58424STheodore Ts'o #else 545424b58424STheodore Ts'o static inline void register_as_ext2(void) { } 545524b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 54562035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 545724b58424STheodore Ts'o #endif 545824b58424STheodore Ts'o 545937f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 546024b58424STheodore Ts'o static inline void register_as_ext3(void) 546124b58424STheodore Ts'o { 546224b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 546324b58424STheodore Ts'o if (err) 546424b58424STheodore Ts'o printk(KERN_WARNING 546524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 546624b58424STheodore Ts'o } 546724b58424STheodore Ts'o 546824b58424STheodore Ts'o static inline void unregister_as_ext3(void) 546924b58424STheodore Ts'o { 547024b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 547124b58424STheodore Ts'o } 54722035e776STheodore Ts'o 54732035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 54742035e776STheodore Ts'o { 54752035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 54762035e776STheodore Ts'o return 0; 54772035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 54782035e776STheodore Ts'o return 0; 54792035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54802035e776STheodore Ts'o return 1; 54812035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 54822035e776STheodore Ts'o return 0; 54832035e776STheodore Ts'o return 1; 54842035e776STheodore Ts'o } 548524b58424STheodore Ts'o #else 548624b58424STheodore Ts'o static inline void register_as_ext3(void) { } 548724b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 54882035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 548924b58424STheodore Ts'o #endif 549024b58424STheodore Ts'o 549103010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5492ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 549303010a33STheodore Ts'o .name = "ext4", 5494152a0836SAl Viro .mount = ext4_mount, 5495ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5496ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5497ac27a0ecSDave Kleikamp }; 54987f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5499ac27a0ecSDave Kleikamp 55008f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5501857ac889SLukas Czerner { 5502857ac889SLukas Czerner struct ext4_features *ef; 5503857ac889SLukas Czerner int ret = -ENOMEM; 5504857ac889SLukas Czerner 5505857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5506857ac889SLukas Czerner if (!ef) 5507857ac889SLukas Czerner goto out; 5508857ac889SLukas Czerner 5509857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5510857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5511857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5512857ac889SLukas Czerner "features"); 5513857ac889SLukas Czerner if (ret) { 5514857ac889SLukas Czerner kfree(ef); 5515857ac889SLukas Czerner goto out; 5516857ac889SLukas Czerner } 5517857ac889SLukas Czerner 5518857ac889SLukas Czerner ext4_feat = ef; 5519857ac889SLukas Czerner ret = 0; 5520857ac889SLukas Czerner out: 5521857ac889SLukas Czerner return ret; 5522857ac889SLukas Czerner } 5523857ac889SLukas Czerner 55248f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 55258f021222SLukas Czerner { 55268f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 55278f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 55288f021222SLukas Czerner kfree(ext4_feat); 55298f021222SLukas Czerner } 55308f021222SLukas Czerner 5531e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5532e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5533e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5534e9e3bcecSEric Sandeen 55355dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5536ac27a0ecSDave Kleikamp { 5537e9e3bcecSEric Sandeen int i, err; 5538c9de560dSAlex Tomas 553907c0c5d8SAl Viro ext4_li_info = NULL; 554007c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 554107c0c5d8SAl Viro 55429a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 554312e9b892SDmitry Monakhov ext4_check_flag_values(); 5544e9e3bcecSEric Sandeen 5545e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5546e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5547e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5548e9e3bcecSEric Sandeen } 5549e9e3bcecSEric Sandeen 555051865fdaSZheng Liu err = ext4_init_es(); 55516fd058f7STheodore Ts'o if (err) 55526fd058f7STheodore Ts'o return err; 555351865fdaSZheng Liu 555451865fdaSZheng Liu err = ext4_init_pageio(); 555551865fdaSZheng Liu if (err) 555651865fdaSZheng Liu goto out7; 555751865fdaSZheng Liu 55585dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5559bd2d0210STheodore Ts'o if (err) 5560d44651d0SFabrice Jouhaud goto out6; 55613197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 55620e376b1eSTheodore Ts'o if (!ext4_kset) { 55630e376b1eSTheodore Ts'o err = -ENOMEM; 5564dd68314cSTheodore Ts'o goto out5; 55650e376b1eSTheodore Ts'o } 5566d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5567857ac889SLukas Czerner 5568857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5569dd68314cSTheodore Ts'o if (err) 5570dd68314cSTheodore Ts'o goto out4; 5571857ac889SLukas Czerner 55725dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5573ac27a0ecSDave Kleikamp if (err) 5574c9de560dSAlex Tomas goto out2; 55759c191f70ST Makphaibulchoke else 55769c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5577ac27a0ecSDave Kleikamp err = init_inodecache(); 5578ac27a0ecSDave Kleikamp if (err) 5579ac27a0ecSDave Kleikamp goto out1; 558024b58424STheodore Ts'o register_as_ext3(); 55812035e776STheodore Ts'o register_as_ext2(); 558203010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5583ac27a0ecSDave Kleikamp if (err) 5584ac27a0ecSDave Kleikamp goto out; 5585bfff6873SLukas Czerner 5586ac27a0ecSDave Kleikamp return 0; 5587ac27a0ecSDave Kleikamp out: 558824b58424STheodore Ts'o unregister_as_ext2(); 558924b58424STheodore Ts'o unregister_as_ext3(); 5590ac27a0ecSDave Kleikamp destroy_inodecache(); 5591ac27a0ecSDave Kleikamp out1: 55929c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 55935dabfc78STheodore Ts'o ext4_exit_mballoc(); 55949c191f70ST Makphaibulchoke out2: 55958f021222SLukas Czerner ext4_exit_feat_adverts(); 55966fd058f7STheodore Ts'o out4: 5597d44651d0SFabrice Jouhaud if (ext4_proc_root) 5598dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5599dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5600d44651d0SFabrice Jouhaud out5: 5601dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5602d44651d0SFabrice Jouhaud out6: 56035dabfc78STheodore Ts'o ext4_exit_pageio(); 560451865fdaSZheng Liu out7: 560551865fdaSZheng Liu ext4_exit_es(); 560651865fdaSZheng Liu 5607ac27a0ecSDave Kleikamp return err; 5608ac27a0ecSDave Kleikamp } 5609ac27a0ecSDave Kleikamp 56105dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5611ac27a0ecSDave Kleikamp { 5612bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 561324b58424STheodore Ts'o unregister_as_ext2(); 561424b58424STheodore Ts'o unregister_as_ext3(); 561503010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5616ac27a0ecSDave Kleikamp destroy_inodecache(); 56175dabfc78STheodore Ts'o ext4_exit_mballoc(); 56188f021222SLukas Czerner ext4_exit_feat_adverts(); 56199f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 56203197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 56215dabfc78STheodore Ts'o ext4_exit_system_zone(); 56225dabfc78STheodore Ts'o ext4_exit_pageio(); 5623dd12ed14SEric Sandeen ext4_exit_es(); 5624ac27a0ecSDave Kleikamp } 5625ac27a0ecSDave Kleikamp 5626ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 562783982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5628ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 56295dabfc78STheodore Ts'o module_init(ext4_init_fs) 56305dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5631