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 { 143a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 144a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 145a9c47317SDarrick J. Wong return 1; 146a9c47317SDarrick J. Wong 147a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 148a9c47317SDarrick J. Wong } 149a9c47317SDarrick J. Wong 15006db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 151a9c47317SDarrick J. Wong { 15206db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 15306db49e6STheodore Ts'o 154a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 155a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 156a9c47317SDarrick J. Wong return; 157a9c47317SDarrick J. Wong 158a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 159a9c47317SDarrick J. Wong } 160a9c47317SDarrick J. Wong 1619933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1629933fc0aSTheodore Ts'o { 1639933fc0aSTheodore Ts'o void *ret; 1649933fc0aSTheodore Ts'o 1658be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1669933fc0aSTheodore Ts'o if (!ret) 1679933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1689933fc0aSTheodore Ts'o return ret; 1699933fc0aSTheodore Ts'o } 1709933fc0aSTheodore Ts'o 1719933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1729933fc0aSTheodore Ts'o { 1739933fc0aSTheodore Ts'o void *ret; 1749933fc0aSTheodore Ts'o 1758be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1769933fc0aSTheodore Ts'o if (!ret) 1779933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1789933fc0aSTheodore Ts'o return ret; 1799933fc0aSTheodore Ts'o } 1809933fc0aSTheodore Ts'o 1819933fc0aSTheodore Ts'o void ext4_kvfree(void *ptr) 1829933fc0aSTheodore Ts'o { 1839933fc0aSTheodore Ts'o if (is_vmalloc_addr(ptr)) 1849933fc0aSTheodore Ts'o vfree(ptr); 1859933fc0aSTheodore Ts'o else 1869933fc0aSTheodore Ts'o kfree(ptr); 1879933fc0aSTheodore Ts'o 1889933fc0aSTheodore Ts'o } 1899933fc0aSTheodore Ts'o 1908fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1918fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 192bd81d8eeSLaurent Vivier { 1933a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1948fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1958fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 196bd81d8eeSLaurent Vivier } 197bd81d8eeSLaurent Vivier 1988fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1998fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 200bd81d8eeSLaurent Vivier { 2015272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 2028fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2038fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 204bd81d8eeSLaurent Vivier } 205bd81d8eeSLaurent Vivier 2068fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2078fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 208bd81d8eeSLaurent Vivier { 2095272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2108fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2118fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 212bd81d8eeSLaurent Vivier } 213bd81d8eeSLaurent Vivier 214021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 215560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 216560671a0SAneesh Kumar K.V { 217560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 218560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 219560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 220560671a0SAneesh Kumar K.V } 221560671a0SAneesh Kumar K.V 222560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 223560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 224560671a0SAneesh Kumar K.V { 225560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 226560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 227560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 228560671a0SAneesh Kumar K.V } 229560671a0SAneesh Kumar K.V 230560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 231560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 232560671a0SAneesh Kumar K.V { 233560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 234560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 235560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 236560671a0SAneesh Kumar K.V } 237560671a0SAneesh Kumar K.V 238560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 239560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 240560671a0SAneesh Kumar K.V { 241560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 242560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 243560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 244560671a0SAneesh Kumar K.V } 245560671a0SAneesh Kumar K.V 2468fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2478fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 248bd81d8eeSLaurent Vivier { 2493a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2508fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2518fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 252bd81d8eeSLaurent Vivier } 253bd81d8eeSLaurent Vivier 2548fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2558fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 256bd81d8eeSLaurent Vivier { 2575272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2588fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2598fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 260bd81d8eeSLaurent Vivier } 261bd81d8eeSLaurent Vivier 2628fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2638fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 264bd81d8eeSLaurent Vivier { 2655272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2668fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2678fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 268bd81d8eeSLaurent Vivier } 269bd81d8eeSLaurent Vivier 270021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 271560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 272560671a0SAneesh Kumar K.V { 273560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 274560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 275560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 276560671a0SAneesh Kumar K.V } 277560671a0SAneesh Kumar K.V 278560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 279560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 280560671a0SAneesh Kumar K.V { 281560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 282560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 283560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 284560671a0SAneesh Kumar K.V } 285560671a0SAneesh Kumar K.V 286560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 287560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 288560671a0SAneesh Kumar K.V { 289560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 290560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 291560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 292560671a0SAneesh Kumar K.V } 293560671a0SAneesh Kumar K.V 294560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 295560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 296560671a0SAneesh Kumar K.V { 297560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 298560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 299560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 300560671a0SAneesh Kumar K.V } 301560671a0SAneesh Kumar K.V 302d3d1faf6SCurt Wohlgemuth 3031c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3041c13d5c0STheodore Ts'o unsigned int line) 3051c13d5c0STheodore Ts'o { 3061c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3071c13d5c0STheodore Ts'o 3081c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3091c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3101c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3111c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3121c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3131c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3141c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3151c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3161c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3171c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3181c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3191c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3201c13d5c0STheodore Ts'o } 32166e61a9eSTheodore Ts'o /* 32266e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 32366e61a9eSTheodore Ts'o * started already 32466e61a9eSTheodore Ts'o */ 32566e61a9eSTheodore Ts'o if (!es->s_error_count) 32666e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 327ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3281c13d5c0STheodore Ts'o } 3291c13d5c0STheodore Ts'o 3301c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3311c13d5c0STheodore Ts'o unsigned int line) 3321c13d5c0STheodore Ts'o { 3331c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3341c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3351c13d5c0STheodore Ts'o } 3361c13d5c0STheodore Ts'o 3377c2e7087STheodore Ts'o /* 3387c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 3397c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 3407c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 3417c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 3427c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 3437c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 3447c2e7087STheodore Ts'o */ 3457c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 3467c2e7087STheodore Ts'o { 3477c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 3487c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 3497c2e7087STheodore Ts'o 3507c2e7087STheodore Ts'o return bdi->dev == NULL; 3517c2e7087STheodore Ts'o } 3527c2e7087STheodore Ts'o 35318aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 35418aadd47SBobi Jam { 35518aadd47SBobi Jam struct super_block *sb = journal->j_private; 35618aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 35718aadd47SBobi Jam int error = is_journal_aborted(journal); 3585d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 35918aadd47SBobi Jam 3605d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 36118aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3625d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3635d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3645d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 36518aadd47SBobi Jam list_del_init(&jce->jce_list); 36618aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 36718aadd47SBobi Jam jce->jce_func(sb, jce, error); 36818aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 36918aadd47SBobi Jam } 37018aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 37118aadd47SBobi Jam } 3721c13d5c0STheodore Ts'o 373ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 374ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 375ac27a0ecSDave Kleikamp * 376ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 377617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 378ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 379ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 380ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 381ac27a0ecSDave Kleikamp * write out the superblock safely. 382ac27a0ecSDave Kleikamp * 383dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 384d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 385ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 386ac27a0ecSDave Kleikamp */ 387ac27a0ecSDave Kleikamp 388617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 389ac27a0ecSDave Kleikamp { 390ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 391ac27a0ecSDave Kleikamp return; 392ac27a0ecSDave Kleikamp 393ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 394617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 395ac27a0ecSDave Kleikamp 3964ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 397ac27a0ecSDave Kleikamp if (journal) 398dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 399ac27a0ecSDave Kleikamp } 400ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 401b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4024418e141SDmitry Monakhov /* 4034418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4044418e141SDmitry Monakhov * before ->s_flags update 4054418e141SDmitry Monakhov */ 4064418e141SDmitry Monakhov smp_wmb(); 407ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 408ac27a0ecSDave Kleikamp } 409ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 410617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 411ac27a0ecSDave Kleikamp sb->s_id); 412ac27a0ecSDave Kleikamp } 413ac27a0ecSDave Kleikamp 414efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 415efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 416efbed4dcSTheodore Ts'o "EXT4-fs error") 417efbed4dcSTheodore Ts'o 41812062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 419c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 420ac27a0ecSDave Kleikamp { 4210ff2ea7dSJoe Perches struct va_format vaf; 422ac27a0ecSDave Kleikamp va_list args; 423ac27a0ecSDave Kleikamp 424efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 425ac27a0ecSDave Kleikamp va_start(args, fmt); 4260ff2ea7dSJoe Perches vaf.fmt = fmt; 4270ff2ea7dSJoe Perches vaf.va = &args; 428efbed4dcSTheodore Ts'o printk(KERN_CRIT 429efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4300ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 431ac27a0ecSDave Kleikamp va_end(args); 432efbed4dcSTheodore Ts'o } 433f3fc0210STheodore Ts'o save_error_info(sb, function, line); 434617ba13bSMingming Cao ext4_handle_error(sb); 435ac27a0ecSDave Kleikamp } 436ac27a0ecSDave Kleikamp 437e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 438c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 439273df556SFrank Mayhar const char *fmt, ...) 440273df556SFrank Mayhar { 441273df556SFrank Mayhar va_list args; 442f7c21177STheodore Ts'o struct va_format vaf; 4431c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 444273df556SFrank Mayhar 4451c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4461c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 447efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 448273df556SFrank Mayhar va_start(args, fmt); 449f7c21177STheodore Ts'o vaf.fmt = fmt; 450f7c21177STheodore Ts'o vaf.va = &args; 451c398eda0STheodore Ts'o if (block) 452d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 453d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 454d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 455d9ee81daSJoe Perches block, current->comm, &vaf); 456d9ee81daSJoe Perches else 457d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 458d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 459d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 460d9ee81daSJoe Perches current->comm, &vaf); 461273df556SFrank Mayhar va_end(args); 462efbed4dcSTheodore Ts'o } 463efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 464273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 465273df556SFrank Mayhar } 466273df556SFrank Mayhar 467e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 468f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 469f7c21177STheodore Ts'o const char *fmt, ...) 470273df556SFrank Mayhar { 471273df556SFrank Mayhar va_list args; 472f7c21177STheodore Ts'o struct va_format vaf; 4731c13d5c0STheodore Ts'o struct ext4_super_block *es; 474496ad9aaSAl Viro struct inode *inode = file_inode(file); 475273df556SFrank Mayhar char pathname[80], *path; 476273df556SFrank Mayhar 4771c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4781c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 479efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 480273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 481f9a62d09SDan Carpenter if (IS_ERR(path)) 482273df556SFrank Mayhar path = "(unknown)"; 483f7c21177STheodore Ts'o va_start(args, fmt); 484f7c21177STheodore Ts'o vaf.fmt = fmt; 485f7c21177STheodore Ts'o vaf.va = &args; 486d9ee81daSJoe Perches if (block) 487d9ee81daSJoe Perches printk(KERN_CRIT 488d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 489d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 490d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 491d9ee81daSJoe Perches block, current->comm, path, &vaf); 492d9ee81daSJoe Perches else 493d9ee81daSJoe Perches printk(KERN_CRIT 494d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 495d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 496d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 497d9ee81daSJoe Perches current->comm, path, &vaf); 498273df556SFrank Mayhar va_end(args); 499efbed4dcSTheodore Ts'o } 500efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 501273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 502273df556SFrank Mayhar } 503273df556SFrank Mayhar 504722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 505ac27a0ecSDave Kleikamp char nbuf[16]) 506ac27a0ecSDave Kleikamp { 507ac27a0ecSDave Kleikamp char *errstr = NULL; 508ac27a0ecSDave Kleikamp 509ac27a0ecSDave Kleikamp switch (errno) { 510ac27a0ecSDave Kleikamp case -EIO: 511ac27a0ecSDave Kleikamp errstr = "IO failure"; 512ac27a0ecSDave Kleikamp break; 513ac27a0ecSDave Kleikamp case -ENOMEM: 514ac27a0ecSDave Kleikamp errstr = "Out of memory"; 515ac27a0ecSDave Kleikamp break; 516ac27a0ecSDave Kleikamp case -EROFS: 51778f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 51878f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 519ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 520ac27a0ecSDave Kleikamp else 521ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 522ac27a0ecSDave Kleikamp break; 523ac27a0ecSDave Kleikamp default: 524ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 525ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 526ac27a0ecSDave Kleikamp * NULL. */ 527ac27a0ecSDave Kleikamp if (nbuf) { 528ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 529ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 530ac27a0ecSDave Kleikamp errstr = nbuf; 531ac27a0ecSDave Kleikamp } 532ac27a0ecSDave Kleikamp break; 533ac27a0ecSDave Kleikamp } 534ac27a0ecSDave Kleikamp 535ac27a0ecSDave Kleikamp return errstr; 536ac27a0ecSDave Kleikamp } 537ac27a0ecSDave Kleikamp 538617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 539ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 540ac27a0ecSDave Kleikamp 541c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 542c398eda0STheodore Ts'o unsigned int line, int errno) 543ac27a0ecSDave Kleikamp { 544ac27a0ecSDave Kleikamp char nbuf[16]; 545ac27a0ecSDave Kleikamp const char *errstr; 546ac27a0ecSDave Kleikamp 547ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 548ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 549ac27a0ecSDave Kleikamp * an error. */ 550ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 551ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 552ac27a0ecSDave Kleikamp return; 553ac27a0ecSDave Kleikamp 554efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 555617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 556c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 557c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 558efbed4dcSTheodore Ts'o } 559ac27a0ecSDave Kleikamp 560efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 561617ba13bSMingming Cao ext4_handle_error(sb); 562ac27a0ecSDave Kleikamp } 563ac27a0ecSDave Kleikamp 564ac27a0ecSDave Kleikamp /* 565617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 566ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 567ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 568ac27a0ecSDave Kleikamp * 569ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 570ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 571ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 572ac27a0ecSDave Kleikamp */ 573ac27a0ecSDave Kleikamp 574c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 575c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 576ac27a0ecSDave Kleikamp { 577ac27a0ecSDave Kleikamp va_list args; 578ac27a0ecSDave Kleikamp 5791c13d5c0STheodore Ts'o save_error_info(sb, function, line); 580ac27a0ecSDave Kleikamp va_start(args, fmt); 581c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 582c398eda0STheodore Ts'o function, line); 583ac27a0ecSDave Kleikamp vprintk(fmt, args); 584ac27a0ecSDave Kleikamp printk("\n"); 585ac27a0ecSDave Kleikamp va_end(args); 586ac27a0ecSDave Kleikamp 5871c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 588b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 5894ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 5904418e141SDmitry Monakhov /* 5914418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 5924418e141SDmitry Monakhov * before ->s_flags update 5934418e141SDmitry Monakhov */ 5944418e141SDmitry Monakhov smp_wmb(); 5954418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 596ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 597dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5981c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5991c13d5c0STheodore Ts'o } 6001c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 6011c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 602ac27a0ecSDave Kleikamp } 603ac27a0ecSDave Kleikamp 604e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 605e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 606b31e1552SEric Sandeen { 6070ff2ea7dSJoe Perches struct va_format vaf; 608b31e1552SEric Sandeen va_list args; 609b31e1552SEric Sandeen 610efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 611efbed4dcSTheodore Ts'o return; 612efbed4dcSTheodore Ts'o 613b31e1552SEric Sandeen va_start(args, fmt); 6140ff2ea7dSJoe Perches vaf.fmt = fmt; 6150ff2ea7dSJoe Perches vaf.va = &args; 6160ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 617b31e1552SEric Sandeen va_end(args); 618b31e1552SEric Sandeen } 619b31e1552SEric Sandeen 62012062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 621c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 622ac27a0ecSDave Kleikamp { 6230ff2ea7dSJoe Perches struct va_format vaf; 624ac27a0ecSDave Kleikamp va_list args; 625ac27a0ecSDave Kleikamp 626efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 627efbed4dcSTheodore Ts'o "EXT4-fs warning")) 628efbed4dcSTheodore Ts'o return; 629efbed4dcSTheodore Ts'o 630ac27a0ecSDave Kleikamp va_start(args, fmt); 6310ff2ea7dSJoe Perches vaf.fmt = fmt; 6320ff2ea7dSJoe Perches vaf.va = &args; 6330ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6340ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 635ac27a0ecSDave Kleikamp va_end(args); 636ac27a0ecSDave Kleikamp } 637ac27a0ecSDave Kleikamp 638e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 639e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 640e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 641e29136f8STheodore Ts'o const char *fmt, ...) 6425d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6435d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6445d1b1b3fSAneesh Kumar K.V { 6450ff2ea7dSJoe Perches struct va_format vaf; 6465d1b1b3fSAneesh Kumar K.V va_list args; 6475d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6485d1b1b3fSAneesh Kumar K.V 6491c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6501c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6511c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6520ff2ea7dSJoe Perches 653efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 6545d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6550ff2ea7dSJoe Perches vaf.fmt = fmt; 6560ff2ea7dSJoe Perches vaf.va = &args; 65721149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 658e29136f8STheodore Ts'o sb->s_id, function, line, grp); 659e29136f8STheodore Ts'o if (ino) 6600ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 661e29136f8STheodore Ts'o if (block) 662efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 663efbed4dcSTheodore Ts'o (unsigned long long) block); 6640ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6655d1b1b3fSAneesh Kumar K.V va_end(args); 666efbed4dcSTheodore Ts'o } 6675d1b1b3fSAneesh Kumar K.V 6685d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 669e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6705d1b1b3fSAneesh Kumar K.V return; 6715d1b1b3fSAneesh Kumar K.V } 6721c13d5c0STheodore Ts'o 6735d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6745d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6755d1b1b3fSAneesh Kumar K.V /* 6765d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6775d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6785d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6795d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6805d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 68125985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 6825d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6835d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6845d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6855d1b1b3fSAneesh Kumar K.V */ 6865d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6875d1b1b3fSAneesh Kumar K.V return; 6885d1b1b3fSAneesh Kumar K.V } 6895d1b1b3fSAneesh Kumar K.V 690617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 691ac27a0ecSDave Kleikamp { 692617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 693ac27a0ecSDave Kleikamp 694617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 695ac27a0ecSDave Kleikamp return; 696ac27a0ecSDave Kleikamp 69712062dddSEric Sandeen ext4_warning(sb, 698ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 699ac27a0ecSDave Kleikamp "running e2fsck is recommended", 700617ba13bSMingming Cao EXT4_DYNAMIC_REV); 701ac27a0ecSDave Kleikamp 702617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 703617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 704617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 705ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 706ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 707ac27a0ecSDave Kleikamp 708ac27a0ecSDave Kleikamp /* 709ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 710ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 711ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 712ac27a0ecSDave Kleikamp */ 713ac27a0ecSDave Kleikamp } 714ac27a0ecSDave Kleikamp 715ac27a0ecSDave Kleikamp /* 716ac27a0ecSDave Kleikamp * Open the external journal device 717ac27a0ecSDave Kleikamp */ 718b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 719ac27a0ecSDave Kleikamp { 720ac27a0ecSDave Kleikamp struct block_device *bdev; 721ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 722ac27a0ecSDave Kleikamp 723d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 724ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 725ac27a0ecSDave Kleikamp goto fail; 726ac27a0ecSDave Kleikamp return bdev; 727ac27a0ecSDave Kleikamp 728ac27a0ecSDave Kleikamp fail: 729b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 730ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 731ac27a0ecSDave Kleikamp return NULL; 732ac27a0ecSDave Kleikamp } 733ac27a0ecSDave Kleikamp 734ac27a0ecSDave Kleikamp /* 735ac27a0ecSDave Kleikamp * Release the journal device 736ac27a0ecSDave Kleikamp */ 7374385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 738ac27a0ecSDave Kleikamp { 7394385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 740ac27a0ecSDave Kleikamp } 741ac27a0ecSDave Kleikamp 7424385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 743ac27a0ecSDave Kleikamp { 744ac27a0ecSDave Kleikamp struct block_device *bdev; 745ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 746ac27a0ecSDave Kleikamp if (bdev) { 7474385bab1SAl Viro ext4_blkdev_put(bdev); 748ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 749ac27a0ecSDave Kleikamp } 750ac27a0ecSDave Kleikamp } 751ac27a0ecSDave Kleikamp 752ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 753ac27a0ecSDave Kleikamp { 754617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 755ac27a0ecSDave Kleikamp } 756ac27a0ecSDave Kleikamp 757617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 758ac27a0ecSDave Kleikamp { 759ac27a0ecSDave Kleikamp struct list_head *l; 760ac27a0ecSDave Kleikamp 761b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 762ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 763ac27a0ecSDave Kleikamp 764ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 765ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 766ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 767ac27a0ecSDave Kleikamp printk(KERN_ERR " " 768ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 769ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 770ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 771ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 772ac27a0ecSDave Kleikamp } 773ac27a0ecSDave Kleikamp } 774ac27a0ecSDave Kleikamp 775617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 776ac27a0ecSDave Kleikamp { 777617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 778617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 779ef2cabf7SHidehiro Kawai int i, err; 780ac27a0ecSDave Kleikamp 781857ac889SLukas Czerner ext4_unregister_li_request(sb); 782e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 783e0ccfd95SChristoph Hellwig 7842e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 7852e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 7864c0425ffSMingming Cao 7870390131bSFrank Mayhar if (sbi->s_journal) { 788ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 78947b4a50bSJan Kara sbi->s_journal = NULL; 790ef2cabf7SHidehiro Kawai if (err < 0) 791c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7920390131bSFrank Mayhar } 793d4edac31SJosef Bacik 794d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 7959105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 796d4edac31SJosef Bacik ext4_release_system_zone(sb); 797d4edac31SJosef Bacik ext4_mb_release(sb); 798d4edac31SJosef Bacik ext4_ext_release(sb); 799d4edac31SJosef Bacik ext4_xattr_put_super(sb); 800d4edac31SJosef Bacik 801ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 802617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 803ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 804ac27a0ecSDave Kleikamp } 80558c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 806a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 807a8e25a83SArtem Bityutskiy 808240799cdSTheodore Ts'o if (sbi->s_proc) { 80966acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 8109f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 811240799cdSTheodore Ts'o } 8123197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 813ac27a0ecSDave Kleikamp 814ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 815ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 816f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 8179933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 81857042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 819ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 820ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 82157042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 822ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 823ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 824a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 825ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 826ac27a0ecSDave Kleikamp #endif 827ac27a0ecSDave Kleikamp 828ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 829ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 830ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 831ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 832ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 833ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 834ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 835ac27a0ecSDave Kleikamp 836f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 837ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 838ac27a0ecSDave Kleikamp /* 839ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 840ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 841ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 842ac27a0ecSDave Kleikamp */ 843ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 844f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 845617ba13bSMingming Cao ext4_blkdev_remove(sbi); 846ac27a0ecSDave Kleikamp } 8479c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 8489c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 8499c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 8509c191f70ST Makphaibulchoke } 851c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 852c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 853ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8543197ebdbSTheodore Ts'o /* 8553197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8563197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8573197ebdbSTheodore Ts'o */ 8583197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8593197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 8600441984aSDarrick J. Wong if (sbi->s_chksum_driver) 8610441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 862705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 863ac27a0ecSDave Kleikamp kfree(sbi); 864ac27a0ecSDave Kleikamp } 865ac27a0ecSDave Kleikamp 866e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 867ac27a0ecSDave Kleikamp 868ac27a0ecSDave Kleikamp /* 869ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 870ac27a0ecSDave Kleikamp */ 871617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 872ac27a0ecSDave Kleikamp { 873617ba13bSMingming Cao struct ext4_inode_info *ei; 874ac27a0ecSDave Kleikamp 875e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 876ac27a0ecSDave Kleikamp if (!ei) 877ac27a0ecSDave Kleikamp return NULL; 8780b8e58a1SAndreas Dilger 879ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 880202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 881c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 882c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8839a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 8849a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 88574cd15cdSZheng Liu INIT_LIST_HEAD(&ei->i_es_lru); 886eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 88774cd15cdSZheng Liu ei->i_es_lru_nr = 0; 888d3922a77SZheng Liu ei->i_touch_when = 0; 889d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 890d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 891d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8929d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 8937e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 894d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 895a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 896a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 897a9e7f447SDmitry Monakhov #endif 8988aefcd55STheodore Ts'o ei->jinode = NULL; 8992e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 900744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 901b436b9beSJan Kara ei->i_sync_tid = 0; 902b436b9beSJan Kara ei->i_datasync_tid = 0; 903f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 904e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9052e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 9060b8e58a1SAndreas Dilger 907ac27a0ecSDave Kleikamp return &ei->vfs_inode; 908ac27a0ecSDave Kleikamp } 909ac27a0ecSDave Kleikamp 9107ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9117ff9c073STheodore Ts'o { 9127ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9137ff9c073STheodore Ts'o 9147ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9157ff9c073STheodore Ts'o return drop; 9167ff9c073STheodore Ts'o } 9177ff9c073STheodore Ts'o 918fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 919fa0d7e3dSNick Piggin { 920fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 921fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 922fa0d7e3dSNick Piggin } 923fa0d7e3dSNick Piggin 924617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 925ac27a0ecSDave Kleikamp { 9269f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 927b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 928b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 929b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9309f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9319f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9329f7dd93dSVasily Averin true); 9339f7dd93dSVasily Averin dump_stack(); 9349f7dd93dSVasily Averin } 935fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 936ac27a0ecSDave Kleikamp } 937ac27a0ecSDave Kleikamp 93851cc5068SAlexey Dobriyan static void init_once(void *foo) 939ac27a0ecSDave Kleikamp { 940617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 941ac27a0ecSDave Kleikamp 942ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 943ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9440e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 945ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 946ac27a0ecSDave Kleikamp } 947ac27a0ecSDave Kleikamp 948e67bc2b3SFabian Frederick static int __init init_inodecache(void) 949ac27a0ecSDave Kleikamp { 950617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 951617ba13bSMingming Cao sizeof(struct ext4_inode_info), 952ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 953ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 95420c2df83SPaul Mundt init_once); 955617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 956ac27a0ecSDave Kleikamp return -ENOMEM; 957ac27a0ecSDave Kleikamp return 0; 958ac27a0ecSDave Kleikamp } 959ac27a0ecSDave Kleikamp 960ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 961ac27a0ecSDave Kleikamp { 9628c0a8537SKirill A. Shutemov /* 9638c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 9648c0a8537SKirill A. Shutemov * destroy cache. 9658c0a8537SKirill A. Shutemov */ 9668c0a8537SKirill A. Shutemov rcu_barrier(); 967617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 968ac27a0ecSDave Kleikamp } 969ac27a0ecSDave Kleikamp 9700930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 971ac27a0ecSDave Kleikamp { 9720930fcc1SAl Viro invalidate_inode_buffers(inode); 973dbd5768fSJan Kara clear_inode(inode); 9749f754758SChristoph Hellwig dquot_drop(inode); 975c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 97651865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 97774cd15cdSZheng Liu ext4_es_lru_del(inode); 9788aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9798aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9808aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9818aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9828aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9838aefcd55STheodore Ts'o } 984ac27a0ecSDave Kleikamp } 985ac27a0ecSDave Kleikamp 9861b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9871b961ac0SChristoph Hellwig u64 ino, u32 generation) 988ac27a0ecSDave Kleikamp { 989ac27a0ecSDave Kleikamp struct inode *inode; 990ac27a0ecSDave Kleikamp 991617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 992ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 993617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 994ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 995ac27a0ecSDave Kleikamp 996ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 997ac27a0ecSDave Kleikamp * 998617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 999ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1000ac27a0ecSDave Kleikamp * 1001ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1002ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1003ac27a0ecSDave Kleikamp */ 1004*f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 10051d1fe1eeSDavid Howells if (IS_ERR(inode)) 10061d1fe1eeSDavid Howells return ERR_CAST(inode); 10071d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1008ac27a0ecSDave Kleikamp iput(inode); 1009ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1010ac27a0ecSDave Kleikamp } 10111b961ac0SChristoph Hellwig 10121b961ac0SChristoph Hellwig return inode; 1013ac27a0ecSDave Kleikamp } 10141b961ac0SChristoph Hellwig 10151b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10161b961ac0SChristoph Hellwig int fh_len, int fh_type) 10171b961ac0SChristoph Hellwig { 10181b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10191b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10201b961ac0SChristoph Hellwig } 10211b961ac0SChristoph Hellwig 10221b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10231b961ac0SChristoph Hellwig int fh_len, int fh_type) 10241b961ac0SChristoph Hellwig { 10251b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10261b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1027ac27a0ecSDave Kleikamp } 1028ac27a0ecSDave Kleikamp 1029c39a7f84SToshiyuki Okajima /* 1030c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1031c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1032c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1033c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1034c39a7f84SToshiyuki Okajima */ 10350b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10360b8e58a1SAndreas Dilger gfp_t wait) 1037c39a7f84SToshiyuki Okajima { 1038c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1039c39a7f84SToshiyuki Okajima 1040c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1041c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1042c39a7f84SToshiyuki Okajima return 0; 1043c39a7f84SToshiyuki Okajima if (journal) 1044c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1045c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1046c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1047c39a7f84SToshiyuki Okajima } 1048c39a7f84SToshiyuki Okajima 1049ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1050ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1051ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1052ac27a0ecSDave Kleikamp 1053617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1054617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1055617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1056617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1057617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10586f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1059f00c9e44SJan Kara struct path *path); 10607c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 10617c319d32SAditya Kali int format_id); 1062ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 10637c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type); 1064617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1065617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1066ac27a0ecSDave Kleikamp size_t len, loff_t off); 1067617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1068ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 10697c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 10707c319d32SAditya Kali unsigned int flags); 10717c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1072ac27a0ecSDave Kleikamp 107361e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 107460e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1075617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1076617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1077617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1078617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1079a5b5ee32SJan Kara .write_info = ext4_write_info, 1080a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1081a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1082ac27a0ecSDave Kleikamp }; 1083ac27a0ecSDave Kleikamp 10840d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1085617ba13bSMingming Cao .quota_on = ext4_quota_on, 1086ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1087287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1088287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1089287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1090287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1091287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1092ac27a0ecSDave Kleikamp }; 10937c319d32SAditya Kali 10947c319d32SAditya Kali static const struct quotactl_ops ext4_qctl_sysfile_operations = { 10957c319d32SAditya Kali .quota_on_meta = ext4_quota_on_sysfile, 10967c319d32SAditya Kali .quota_off = ext4_quota_off_sysfile, 10977c319d32SAditya Kali .quota_sync = dquot_quota_sync, 10987c319d32SAditya Kali .get_info = dquot_get_dqinfo, 10997c319d32SAditya Kali .set_info = dquot_set_dqinfo, 11007c319d32SAditya Kali .get_dqblk = dquot_get_dqblk, 11017c319d32SAditya Kali .set_dqblk = dquot_set_dqblk 11027c319d32SAditya Kali }; 1103ac27a0ecSDave Kleikamp #endif 1104ac27a0ecSDave Kleikamp 1105ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1106617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1107617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1108617ba13bSMingming Cao .write_inode = ext4_write_inode, 1109617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11107ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11110930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1112617ba13bSMingming Cao .put_super = ext4_put_super, 1113617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1114c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1115c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1116617ba13bSMingming Cao .statfs = ext4_statfs, 1117617ba13bSMingming Cao .remount_fs = ext4_remount, 1118617ba13bSMingming Cao .show_options = ext4_show_options, 1119ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1120617ba13bSMingming Cao .quota_read = ext4_quota_read, 1121617ba13bSMingming Cao .quota_write = ext4_quota_write, 1122ac27a0ecSDave Kleikamp #endif 1123c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1124ac27a0ecSDave Kleikamp }; 1125ac27a0ecSDave Kleikamp 112639655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11271b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11281b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1129617ba13bSMingming Cao .get_parent = ext4_get_parent, 1130ac27a0ecSDave Kleikamp }; 1131ac27a0ecSDave Kleikamp 1132ac27a0ecSDave Kleikamp enum { 1133ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1134ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 113572578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1136ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 113772578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1138ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1139ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1140ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1141296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1142ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11435a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1144ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1145661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 11461449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 11471449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11485328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1149744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1150fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1151df981d03STheodore Ts'o Opt_max_dir_size_kb, 1152ac27a0ecSDave Kleikamp }; 1153ac27a0ecSDave Kleikamp 1154a447c093SSteven Whitehouse static const match_table_t tokens = { 1155ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1156ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1157ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1158ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1159ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1160ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1161ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1162ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1163ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1164ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1165ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1166ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1167ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1168ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 116972578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 117072578c33STheodore Ts'o {Opt_removed, "orlov"}, 1171ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1172ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1173ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1174ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1175e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11765a916be1STheodore Ts'o {Opt_noload, "noload"}, 117772578c33STheodore Ts'o {Opt_removed, "nobh"}, 117872578c33STheodore Ts'o {Opt_removed, "bh"}, 1179ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 118030773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 118130773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1182ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1183ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1184818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1185818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1186ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1187ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1188ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1189ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11905bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11915bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1192ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1193ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1194ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1195ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1196ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1197ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 11985a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1199ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1200ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1201ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1202ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1203ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 120406705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 120506705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 120625ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1207c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 120864769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1209dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 121036ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 121136ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 12126fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12136fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1214240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1215b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1216afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 121706705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 121806705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1219744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1220744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12215328e635SEric Sandeen {Opt_discard, "discard"}, 12225328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1223fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1224fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1225fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1226df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1227c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1228c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1229c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1230c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1231c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1232f3f12faaSJosef Bacik {Opt_err, NULL}, 1233ac27a0ecSDave Kleikamp }; 1234ac27a0ecSDave Kleikamp 1235617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1236ac27a0ecSDave Kleikamp { 1237617ba13bSMingming Cao ext4_fsblk_t sb_block; 1238ac27a0ecSDave Kleikamp char *options = (char *) *data; 1239ac27a0ecSDave Kleikamp 1240ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1241ac27a0ecSDave Kleikamp return 1; /* Default location */ 12420b8e58a1SAndreas Dilger 1243ac27a0ecSDave Kleikamp options += 3; 12440b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1245ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1246ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12474776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1248ac27a0ecSDave Kleikamp (char *) *data); 1249ac27a0ecSDave Kleikamp return 1; 1250ac27a0ecSDave Kleikamp } 1251ac27a0ecSDave Kleikamp if (*options == ',') 1252ac27a0ecSDave Kleikamp options++; 1253ac27a0ecSDave Kleikamp *data = (void *) options; 12540b8e58a1SAndreas Dilger 1255ac27a0ecSDave Kleikamp return sb_block; 1256ac27a0ecSDave Kleikamp } 1257ac27a0ecSDave Kleikamp 1258b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1259437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1260437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1261b3881f74STheodore Ts'o 126256c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 126356c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 126456c50f11SDmitry Monakhov { 126556c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 126656c50f11SDmitry Monakhov char *qname; 126703dafb5fSChen Gang int ret = -1; 126856c50f11SDmitry Monakhov 126956c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 127056c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 127156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127256c50f11SDmitry Monakhov "Cannot change journaled " 127356c50f11SDmitry Monakhov "quota options when quota turned on"); 127457f73c2cSTheodore Ts'o return -1; 127556c50f11SDmitry Monakhov } 1276262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1277262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1278262b4662SJan Kara "when QUOTA feature is enabled"); 1279262b4662SJan Kara return -1; 1280262b4662SJan Kara } 128156c50f11SDmitry Monakhov qname = match_strdup(args); 128256c50f11SDmitry Monakhov if (!qname) { 128356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128456c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 128557f73c2cSTheodore Ts'o return -1; 128656c50f11SDmitry Monakhov } 128703dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 128803dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 128903dafb5fSChen Gang ret = 1; 129003dafb5fSChen Gang else 129156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129203dafb5fSChen Gang "%s quota file already specified", 129303dafb5fSChen Gang QTYPE2NAME(qtype)); 129403dafb5fSChen Gang goto errout; 129556c50f11SDmitry Monakhov } 129603dafb5fSChen Gang if (strchr(qname, '/')) { 129756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129856c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 129903dafb5fSChen Gang goto errout; 130056c50f11SDmitry Monakhov } 130103dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1302fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 130356c50f11SDmitry Monakhov return 1; 130403dafb5fSChen Gang errout: 130503dafb5fSChen Gang kfree(qname); 130603dafb5fSChen Gang return ret; 130756c50f11SDmitry Monakhov } 130856c50f11SDmitry Monakhov 130956c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 131056c50f11SDmitry Monakhov { 131156c50f11SDmitry Monakhov 131256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 131356c50f11SDmitry Monakhov 131456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 131556c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 131656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 131756c50f11SDmitry Monakhov " when quota turned on"); 131857f73c2cSTheodore Ts'o return -1; 131956c50f11SDmitry Monakhov } 132003dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 132156c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 132256c50f11SDmitry Monakhov return 1; 132356c50f11SDmitry Monakhov } 132456c50f11SDmitry Monakhov #endif 132556c50f11SDmitry Monakhov 132626092bf5STheodore Ts'o #define MOPT_SET 0x0001 132726092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 132826092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 132926092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 133026092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 133126092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 133226092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 133326092bf5STheodore Ts'o #define MOPT_Q 0 133426092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 133526092bf5STheodore Ts'o #else 133626092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 133726092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 133826092bf5STheodore Ts'o #endif 133926092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13408dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13418dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13428dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1343ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 134426092bf5STheodore Ts'o 134526092bf5STheodore Ts'o static const struct mount_opts { 134626092bf5STheodore Ts'o int token; 134726092bf5STheodore Ts'o int mount_opt; 134826092bf5STheodore Ts'o int flags; 134926092bf5STheodore Ts'o } ext4_mount_opts[] = { 135026092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 135126092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 135226092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 135326092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 135426092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 135526092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13568dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13578dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13588dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13598dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 136026092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 136126092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13628dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13638dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13648dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 136559d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 13668dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 13678dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 136826092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13698dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 13708dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13718dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 137226092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 137326092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 137426092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13758dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13768dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13778dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13788dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 137926092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 138026092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 138126092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 138226092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 138326092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 138426092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 138526092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 138626092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 138726092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 138826092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 138926092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 13900efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 13910efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 13920efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 1393ad4eec61SEric Sandeen {Opt_journal_path, 0, MOPT_STRING}, 13940efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 13958dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13968dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13978dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 13988dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 139926092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 140026092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 140126092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 140226092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 140326092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 140426092bf5STheodore Ts'o #else 140526092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 140626092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 140726092bf5STheodore Ts'o #endif 140826092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 140926092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 141026092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 141126092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 141226092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 141326092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 141426092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 141526092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 141626092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 141726092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 141826092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 141926092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 142026092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 142126092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 142226092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 142326092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1424df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 142526092bf5STheodore Ts'o {Opt_err, 0, 0} 142626092bf5STheodore Ts'o }; 142726092bf5STheodore Ts'o 142826092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 142926092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 143026092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 143126092bf5STheodore Ts'o { 143226092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 143326092bf5STheodore Ts'o const struct mount_opts *m; 143408cefc7aSEric W. Biederman kuid_t uid; 143508cefc7aSEric W. Biederman kgid_t gid; 143626092bf5STheodore Ts'o int arg = 0; 143726092bf5STheodore Ts'o 143857f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 143957f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 144057f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 144157f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 144257f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 144357f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 144457f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 144557f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 144657f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 144757f73c2cSTheodore Ts'o #endif 144826092bf5STheodore Ts'o switch (token) { 1449f7048605STheodore Ts'o case Opt_noacl: 1450f7048605STheodore Ts'o case Opt_nouser_xattr: 1451f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1452f7048605STheodore Ts'o break; 145326092bf5STheodore Ts'o case Opt_sb: 145426092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 145526092bf5STheodore Ts'o case Opt_removed: 14565f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 145726092bf5STheodore Ts'o return 1; 145826092bf5STheodore Ts'o case Opt_abort: 145926092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 146026092bf5STheodore Ts'o return 1; 146126092bf5STheodore Ts'o case Opt_i_version: 146226092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 146326092bf5STheodore Ts'o return 1; 146426092bf5STheodore Ts'o } 146526092bf5STheodore Ts'o 14665f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14675f3633e3SJan Kara if (token == m->token) 14685f3633e3SJan Kara break; 14695f3633e3SJan Kara 14705f3633e3SJan Kara if (m->token == Opt_err) { 14715f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 14725f3633e3SJan Kara "or missing value", opt); 14735f3633e3SJan Kara return -1; 14745f3633e3SJan Kara } 14755f3633e3SJan Kara 14768dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 14778dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14788dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 14798dc0aa8cSTheodore Ts'o return -1; 14808dc0aa8cSTheodore Ts'o } 14818dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 14828dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14838dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 14848dc0aa8cSTheodore Ts'o return -1; 14858dc0aa8cSTheodore Ts'o } 14868dc0aa8cSTheodore Ts'o 1487ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 14880efb3b23SJan Kara return -1; 148926092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 149026092bf5STheodore Ts'o return -1; 149126092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 149226092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 149326092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 149426092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 149526092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 149626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 149726092bf5STheodore Ts'o "options when quota turned on"); 149826092bf5STheodore Ts'o return -1; 149926092bf5STheodore Ts'o } 150026092bf5STheodore Ts'o 150126092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 150226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 150326092bf5STheodore Ts'o } else if (token == Opt_commit) { 150426092bf5STheodore Ts'o if (arg == 0) 150526092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 150626092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 150726092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 150826092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 150926092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 151026092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 151126092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1512e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1513e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1514e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1515e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 151626092bf5STheodore Ts'o return -1; 151726092bf5STheodore Ts'o } 151826092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 151926092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 152026092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 152126092bf5STheodore Ts'o if (!args->from) 152226092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 152326092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1524df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1525df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 152626092bf5STheodore Ts'o } else if (token == Opt_stripe) { 152726092bf5STheodore Ts'o sbi->s_stripe = arg; 15280efb3b23SJan Kara } else if (token == Opt_resuid) { 15290efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15300efb3b23SJan Kara if (!uid_valid(uid)) { 15315f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15320efb3b23SJan Kara return -1; 15330efb3b23SJan Kara } 15340efb3b23SJan Kara sbi->s_resuid = uid; 15350efb3b23SJan Kara } else if (token == Opt_resgid) { 15360efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15370efb3b23SJan Kara if (!gid_valid(gid)) { 15385f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15390efb3b23SJan Kara return -1; 15400efb3b23SJan Kara } 15410efb3b23SJan Kara sbi->s_resgid = gid; 15420efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15430efb3b23SJan Kara if (is_remount) { 15440efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15450efb3b23SJan Kara "Cannot specify journal on remount"); 15460efb3b23SJan Kara return -1; 15470efb3b23SJan Kara } 15480efb3b23SJan Kara *journal_devnum = arg; 1549ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1550ad4eec61SEric Sandeen char *journal_path; 1551ad4eec61SEric Sandeen struct inode *journal_inode; 1552ad4eec61SEric Sandeen struct path path; 1553ad4eec61SEric Sandeen int error; 1554ad4eec61SEric Sandeen 1555ad4eec61SEric Sandeen if (is_remount) { 1556ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1557ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1558ad4eec61SEric Sandeen return -1; 1559ad4eec61SEric Sandeen } 1560ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1561ad4eec61SEric Sandeen if (!journal_path) { 1562ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1563ad4eec61SEric Sandeen "journal device string"); 1564ad4eec61SEric Sandeen return -1; 1565ad4eec61SEric Sandeen } 1566ad4eec61SEric Sandeen 1567ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1568ad4eec61SEric Sandeen if (error) { 1569ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1570ad4eec61SEric Sandeen "journal device path: error %d", error); 1571ad4eec61SEric Sandeen kfree(journal_path); 1572ad4eec61SEric Sandeen return -1; 1573ad4eec61SEric Sandeen } 1574ad4eec61SEric Sandeen 1575ad4eec61SEric Sandeen journal_inode = path.dentry->d_inode; 1576ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1577ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1578ad4eec61SEric Sandeen "is not a block device", journal_path); 1579ad4eec61SEric Sandeen path_put(&path); 1580ad4eec61SEric Sandeen kfree(journal_path); 1581ad4eec61SEric Sandeen return -1; 1582ad4eec61SEric Sandeen } 1583ad4eec61SEric Sandeen 1584ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1585ad4eec61SEric Sandeen path_put(&path); 1586ad4eec61SEric Sandeen kfree(journal_path); 15870efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 15880efb3b23SJan Kara if (arg > 7) { 15895f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 15900efb3b23SJan Kara " (must be 0-7)"); 15910efb3b23SJan Kara return -1; 15920efb3b23SJan Kara } 15930efb3b23SJan Kara *journal_ioprio = 15940efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 159526092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 159626092bf5STheodore Ts'o if (is_remount) { 159726092bf5STheodore Ts'o if (!sbi->s_journal) 159826092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 15995f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 160026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 160126092bf5STheodore Ts'o "Cannot change data mode on remount"); 160226092bf5STheodore Ts'o return -1; 160326092bf5STheodore Ts'o } 160426092bf5STheodore Ts'o } else { 160526092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 160626092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 160726092bf5STheodore Ts'o } 160826092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 160926092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 161026092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 161126092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16125f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16135f3633e3SJan Kara "quota options when quota turned on"); 161426092bf5STheodore Ts'o return -1; 161526092bf5STheodore Ts'o } 1616262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1617262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1618262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1619262b4662SJan Kara "Cannot set journaled quota options " 1620262b4662SJan Kara "when QUOTA feature is enabled"); 1621262b4662SJan Kara return -1; 1622262b4662SJan Kara } 162326092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 162426092bf5STheodore Ts'o #endif 162526092bf5STheodore Ts'o } else { 162626092bf5STheodore Ts'o if (!args->from) 162726092bf5STheodore Ts'o arg = 1; 162826092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 162926092bf5STheodore Ts'o arg = !arg; 163026092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 163126092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 163226092bf5STheodore Ts'o "buggy handling of option %s", opt); 163326092bf5STheodore Ts'o WARN_ON(1); 163426092bf5STheodore Ts'o return -1; 163526092bf5STheodore Ts'o } 163626092bf5STheodore Ts'o if (arg != 0) 163726092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 163826092bf5STheodore Ts'o else 163926092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 164026092bf5STheodore Ts'o } 164126092bf5STheodore Ts'o return 1; 164226092bf5STheodore Ts'o } 164326092bf5STheodore Ts'o 1644ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1645c3191067STheodore Ts'o unsigned long *journal_devnum, 1646b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1647661aa520SEric Sandeen int is_remount) 1648ac27a0ecSDave Kleikamp { 1649617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1650ac27a0ecSDave Kleikamp char *p; 1651ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 165226092bf5STheodore Ts'o int token; 1653ac27a0ecSDave Kleikamp 1654ac27a0ecSDave Kleikamp if (!options) 1655ac27a0ecSDave Kleikamp return 1; 1656ac27a0ecSDave Kleikamp 1657ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1658ac27a0ecSDave Kleikamp if (!*p) 1659ac27a0ecSDave Kleikamp continue; 166015121c18SEric Sandeen /* 166115121c18SEric Sandeen * Initialize args struct so we know whether arg was 166215121c18SEric Sandeen * found; some options take optional arguments. 166315121c18SEric Sandeen */ 1664caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1665ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 166626092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 166726092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1668ac27a0ecSDave Kleikamp return 0; 1669ac27a0ecSDave Kleikamp } 1670ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1671262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1672262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1673262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1674262b4662SJan Kara "feature is enabled"); 1675262b4662SJan Kara return 0; 1676262b4662SJan Kara } 1677ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1678482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1679fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1680ac27a0ecSDave Kleikamp 1681482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1682fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1683ac27a0ecSDave Kleikamp 168456c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1685b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1686b31e1552SEric Sandeen "format mixing"); 1687ac27a0ecSDave Kleikamp return 0; 1688ac27a0ecSDave Kleikamp } 1689ac27a0ecSDave Kleikamp 1690ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1691b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1692b31e1552SEric Sandeen "not specified"); 1693ac27a0ecSDave Kleikamp return 0; 1694ac27a0ecSDave Kleikamp } 1695ac27a0ecSDave Kleikamp } 1696ac27a0ecSDave Kleikamp #endif 1697261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1698261cb20cSJan Kara int blocksize = 1699261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1700261cb20cSJan Kara 1701261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1702261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1703261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1704261cb20cSJan Kara return 0; 1705261cb20cSJan Kara } 1706261cb20cSJan Kara } 1707ac27a0ecSDave Kleikamp return 1; 1708ac27a0ecSDave Kleikamp } 1709ac27a0ecSDave Kleikamp 17102adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17112adf6da8STheodore Ts'o struct super_block *sb) 17122adf6da8STheodore Ts'o { 17132adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17142adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17152adf6da8STheodore Ts'o 17162adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17172adf6da8STheodore Ts'o char *fmtname = ""; 17182adf6da8STheodore Ts'o 17192adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17202adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17212adf6da8STheodore Ts'o fmtname = "vfsold"; 17222adf6da8STheodore Ts'o break; 17232adf6da8STheodore Ts'o case QFMT_VFS_V0: 17242adf6da8STheodore Ts'o fmtname = "vfsv0"; 17252adf6da8STheodore Ts'o break; 17262adf6da8STheodore Ts'o case QFMT_VFS_V1: 17272adf6da8STheodore Ts'o fmtname = "vfsv1"; 17282adf6da8STheodore Ts'o break; 17292adf6da8STheodore Ts'o } 17302adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17312adf6da8STheodore Ts'o } 17322adf6da8STheodore Ts'o 17332adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17342adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17352adf6da8STheodore Ts'o 17362adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17372adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17382adf6da8STheodore Ts'o #endif 17392adf6da8STheodore Ts'o } 17402adf6da8STheodore Ts'o 17415a916be1STheodore Ts'o static const char *token2str(int token) 17425a916be1STheodore Ts'o { 174350df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17445a916be1STheodore Ts'o 17455a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17465a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17475a916be1STheodore Ts'o break; 17485a916be1STheodore Ts'o return t->pattern; 17495a916be1STheodore Ts'o } 17505a916be1STheodore Ts'o 17512adf6da8STheodore Ts'o /* 17522adf6da8STheodore Ts'o * Show an option if 17532adf6da8STheodore Ts'o * - it's set to a non-default value OR 17542adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17552adf6da8STheodore Ts'o */ 175666acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 175766acdcf4STheodore Ts'o int nodefs) 17582adf6da8STheodore Ts'o { 17592adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17602adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 176166acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17625a916be1STheodore Ts'o const struct mount_opts *m; 176366acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17642adf6da8STheodore Ts'o 176566acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 176666acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17672adf6da8STheodore Ts'o 17682adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17695a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17705a916be1STheodore Ts'o 17715a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17725a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17735a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17745a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17755a916be1STheodore Ts'o continue; 177666acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17775a916be1STheodore Ts'o continue; /* skip if same as the default */ 17785a916be1STheodore Ts'o if ((want_set && 17795a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17805a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17815a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17825a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17835a916be1STheodore Ts'o } 17845a916be1STheodore Ts'o 178508cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17865a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 178708cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 178808cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 178908cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 17905a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 179108cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 179208cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 179366acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 17945a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 17955a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 17962adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 17975a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 17982adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 17995a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 180066acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18015a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 180266acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18035a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 180466acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18055a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18062adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18075a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 180866acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18095a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 181066acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18112adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18125a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18132adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18145a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18152adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18165a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18175a916be1STheodore Ts'o } 181866acdcf4STheodore Ts'o if (nodefs || 181966acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18205a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18212adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18222adf6da8STheodore Ts'o 182366acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 182466acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18255a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1826df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1827df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18282adf6da8STheodore Ts'o 18292adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18302adf6da8STheodore Ts'o return 0; 18312adf6da8STheodore Ts'o } 18322adf6da8STheodore Ts'o 183366acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 183466acdcf4STheodore Ts'o { 183566acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 183666acdcf4STheodore Ts'o } 183766acdcf4STheodore Ts'o 183866acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 183966acdcf4STheodore Ts'o { 184066acdcf4STheodore Ts'o struct super_block *sb = seq->private; 184166acdcf4STheodore Ts'o int rc; 184266acdcf4STheodore Ts'o 184366acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 184466acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 184566acdcf4STheodore Ts'o seq_puts(seq, "\n"); 184666acdcf4STheodore Ts'o return rc; 184766acdcf4STheodore Ts'o } 184866acdcf4STheodore Ts'o 184966acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 185066acdcf4STheodore Ts'o { 1851d9dda78bSAl Viro return single_open(file, options_seq_show, PDE_DATA(inode)); 185266acdcf4STheodore Ts'o } 185366acdcf4STheodore Ts'o 185466acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 185566acdcf4STheodore Ts'o .owner = THIS_MODULE, 185666acdcf4STheodore Ts'o .open = options_open_fs, 185766acdcf4STheodore Ts'o .read = seq_read, 185866acdcf4STheodore Ts'o .llseek = seq_lseek, 185966acdcf4STheodore Ts'o .release = single_release, 186066acdcf4STheodore Ts'o }; 186166acdcf4STheodore Ts'o 1862617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1863ac27a0ecSDave Kleikamp int read_only) 1864ac27a0ecSDave Kleikamp { 1865617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1866ac27a0ecSDave Kleikamp int res = 0; 1867ac27a0ecSDave Kleikamp 1868617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1869b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1870b31e1552SEric Sandeen "forcing read-only mode"); 1871ac27a0ecSDave Kleikamp res = MS_RDONLY; 1872ac27a0ecSDave Kleikamp } 1873ac27a0ecSDave Kleikamp if (read_only) 1874281b5995STheodore Ts'o goto done; 1875617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1876b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1877b31e1552SEric Sandeen "running e2fsck is recommended"); 1878c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 1879b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1880b31e1552SEric Sandeen "warning: mounting fs with errors, " 1881b31e1552SEric Sandeen "running e2fsck is recommended"); 1882ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1883ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1884ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1885b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1886b31e1552SEric Sandeen "warning: maximal mount count reached, " 1887b31e1552SEric Sandeen "running e2fsck is recommended"); 1888ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1889ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1890ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1891b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1892b31e1552SEric Sandeen "warning: checktime reached, " 1893b31e1552SEric Sandeen "running e2fsck is recommended"); 18940390131bSFrank Mayhar if (!sbi->s_journal) 1895216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1896ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1897617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1898e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1899ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1900617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19010390131bSFrank Mayhar if (sbi->s_journal) 1902617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1903ac27a0ecSDave Kleikamp 1904e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1905281b5995STheodore Ts'o done: 1906ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1907a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1908a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1909ac27a0ecSDave Kleikamp sb->s_blocksize, 1910ac27a0ecSDave Kleikamp sbi->s_groups_count, 1911617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1912617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1913a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1914ac27a0ecSDave Kleikamp 19157abc52c2SDan Magenheimer cleancache_init_fs(sb); 1916ac27a0ecSDave Kleikamp return res; 1917ac27a0ecSDave Kleikamp } 1918ac27a0ecSDave Kleikamp 1919117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1920117fff10STheodore Ts'o { 1921117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1922117fff10STheodore Ts'o struct flex_groups *new_groups; 1923117fff10STheodore Ts'o int size; 1924117fff10STheodore Ts'o 1925117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1926117fff10STheodore Ts'o return 0; 1927117fff10STheodore Ts'o 1928117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1929117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1930117fff10STheodore Ts'o return 0; 1931117fff10STheodore Ts'o 1932117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1933117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1934117fff10STheodore Ts'o if (!new_groups) { 1935117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1936117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1937117fff10STheodore Ts'o return -ENOMEM; 1938117fff10STheodore Ts'o } 1939117fff10STheodore Ts'o 1940117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1941117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1942117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1943117fff10STheodore Ts'o sizeof(struct flex_groups))); 1944117fff10STheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 1945117fff10STheodore Ts'o } 1946117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1947117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1948117fff10STheodore Ts'o return 0; 1949117fff10STheodore Ts'o } 1950117fff10STheodore Ts'o 1951772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1952772cb7c8SJose R. Santos { 1953772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1954772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1955772cb7c8SJose R. Santos ext4_group_t flex_group; 1956117fff10STheodore Ts'o int i, err; 1957772cb7c8SJose R. Santos 1958503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1959d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1960772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1961772cb7c8SJose R. Santos return 1; 1962772cb7c8SJose R. Santos } 1963772cb7c8SJose R. Santos 1964117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1965117fff10STheodore Ts'o if (err) 1966772cb7c8SJose R. Santos goto failed; 1967772cb7c8SJose R. Santos 1968772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 196988b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1970772cb7c8SJose R. Santos 1971772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19727ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19737ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 197490ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 197524aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19767ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19777ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1978772cb7c8SJose R. Santos } 1979772cb7c8SJose R. Santos 1980772cb7c8SJose R. Santos return 1; 1981772cb7c8SJose R. Santos failed: 1982772cb7c8SJose R. Santos return 0; 1983772cb7c8SJose R. Santos } 1984772cb7c8SJose R. Santos 1985feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1986717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1987717d50e4SAndreas Dilger { 1988feb0ab32SDarrick J. Wong int offset; 1989717d50e4SAndreas Dilger __u16 crc = 0; 1990717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1991717d50e4SAndreas Dilger 1992feb0ab32SDarrick J. Wong if ((sbi->s_es->s_feature_ro_compat & 1993feb0ab32SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { 1994feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1995d6a77105STheodore Ts'o __le16 save_csum; 1996feb0ab32SDarrick J. Wong __u32 csum32; 1997feb0ab32SDarrick J. Wong 1998d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 1999feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 2000feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2001feb0ab32SDarrick J. Wong sizeof(le_group)); 2002feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2003feb0ab32SDarrick J. Wong sbi->s_desc_size); 2004d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 2005feb0ab32SDarrick J. Wong 2006feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2007feb0ab32SDarrick J. Wong goto out; 2008feb0ab32SDarrick J. Wong } 2009feb0ab32SDarrick J. Wong 2010feb0ab32SDarrick J. Wong /* old crc16 code */ 2011feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2012feb0ab32SDarrick J. Wong 2013717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2014717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2015717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2016717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2017717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2018717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2019717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2020717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2021717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2022717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2023717d50e4SAndreas Dilger offset); 2024717d50e4SAndreas Dilger 2025feb0ab32SDarrick J. Wong out: 2026717d50e4SAndreas Dilger return cpu_to_le16(crc); 2027717d50e4SAndreas Dilger } 2028717d50e4SAndreas Dilger 2029feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2030717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2031717d50e4SAndreas Dilger { 2032feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2033feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2034feb0ab32SDarrick J. Wong block_group, gdp))) 2035717d50e4SAndreas Dilger return 0; 2036717d50e4SAndreas Dilger 2037717d50e4SAndreas Dilger return 1; 2038717d50e4SAndreas Dilger } 2039717d50e4SAndreas Dilger 2040feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2041feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2042feb0ab32SDarrick J. Wong { 2043feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2044feb0ab32SDarrick J. Wong return; 2045feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2046feb0ab32SDarrick J. Wong } 2047feb0ab32SDarrick J. Wong 2048ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2049bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2050bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2051ac27a0ecSDave Kleikamp { 2052617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2053617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2054617ba13bSMingming Cao ext4_fsblk_t last_block; 2055bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2056bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2057bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2058ce421581SJose R. Santos int flexbg_flag = 0; 2059bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2060ac27a0ecSDave Kleikamp 2061ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2062ce421581SJose R. Santos flexbg_flag = 1; 2063ce421581SJose R. Santos 2064617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2065ac27a0ecSDave Kleikamp 2066197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2067197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2068197cd65aSAkinobu Mita 2069ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2070bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2071ac27a0ecSDave Kleikamp else 2072ac27a0ecSDave Kleikamp last_block = first_block + 2073617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2074ac27a0ecSDave Kleikamp 2075bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2076bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2077bfff6873SLukas Czerner grp = i; 2078bfff6873SLukas Czerner 20798fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20802b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2081b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2082a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2083b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2084ac27a0ecSDave Kleikamp return 0; 2085ac27a0ecSDave Kleikamp } 20868fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20872b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2088b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2089a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2090b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2091ac27a0ecSDave Kleikamp return 0; 2092ac27a0ecSDave Kleikamp } 20938fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2094bd81d8eeSLaurent Vivier if (inode_table < first_block || 20952b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2096b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2097a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2098b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2099ac27a0ecSDave Kleikamp return 0; 2100ac27a0ecSDave Kleikamp } 2101955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2102feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2103b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2104b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2105fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2106fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21077ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2108955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2109717d50e4SAndreas Dilger return 0; 2110717d50e4SAndreas Dilger } 21117ee1ec4cSLi Zefan } 2112955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2113ce421581SJose R. Santos if (!flexbg_flag) 2114617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2115ac27a0ecSDave Kleikamp } 2116bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2117bfff6873SLukas Czerner *first_not_zeroed = grp; 2118ac27a0ecSDave Kleikamp return 1; 2119ac27a0ecSDave Kleikamp } 2120ac27a0ecSDave Kleikamp 2121617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2122ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2123ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2124ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2125ac27a0ecSDave Kleikamp * 2126ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2127ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2128ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2129ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2130ac27a0ecSDave Kleikamp * 2131ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2132ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2133ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2134617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2135ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2136ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2137ac27a0ecSDave Kleikamp */ 2138617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2139617ba13bSMingming Cao struct ext4_super_block *es) 2140ac27a0ecSDave Kleikamp { 2141ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2142ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2143ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2144ac27a0ecSDave Kleikamp int i; 2145ac27a0ecSDave Kleikamp #endif 2146ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2147ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2148ac27a0ecSDave Kleikamp return; 2149ac27a0ecSDave Kleikamp } 2150ac27a0ecSDave Kleikamp 2151a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2152b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2153b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2154a8f48a95SEric Sandeen return; 2155a8f48a95SEric Sandeen } 2156a8f48a95SEric Sandeen 2157d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2158d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2159d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2160d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2161d39195c3SAmir Goldstein return; 2162d39195c3SAmir Goldstein } 2163d39195c3SAmir Goldstein 2164617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2165c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2166c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 216784474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2168ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2169ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2170c25f9bc6SEric Sandeen } 2171ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2172ac27a0ecSDave Kleikamp return; 2173ac27a0ecSDave Kleikamp } 2174ac27a0ecSDave Kleikamp 2175ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2176b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2177ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2178ac27a0ecSDave Kleikamp } 2179ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2180ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2181ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2182ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2183a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2184617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2185617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2186ac27a0ecSDave Kleikamp if (ret < 0) 2187b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2188b31e1552SEric Sandeen "Cannot turn on journaled " 2189b31e1552SEric Sandeen "quota: error %d", ret); 2190ac27a0ecSDave Kleikamp } 2191ac27a0ecSDave Kleikamp } 2192ac27a0ecSDave Kleikamp #endif 2193ac27a0ecSDave Kleikamp 2194ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2195ac27a0ecSDave Kleikamp struct inode *inode; 2196ac27a0ecSDave Kleikamp 219797bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 219897bd42b9SJosef Bacik if (IS_ERR(inode)) { 2199ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2200ac27a0ecSDave Kleikamp break; 2201ac27a0ecSDave Kleikamp } 2202ac27a0ecSDave Kleikamp 2203617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2204871a2931SChristoph Hellwig dquot_initialize(inode); 2205ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2206566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2207b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2208b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 220946e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2210e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2211ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2212721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 221355f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2214617ba13bSMingming Cao ext4_truncate(inode); 2215721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2216ac27a0ecSDave Kleikamp nr_truncates++; 2217ac27a0ecSDave Kleikamp } else { 2218566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2219b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2220b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 222146e665e9SHarvey Harrison __func__, inode->i_ino); 2222ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2223ac27a0ecSDave Kleikamp inode->i_ino); 2224ac27a0ecSDave Kleikamp nr_orphans++; 2225ac27a0ecSDave Kleikamp } 2226ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2227ac27a0ecSDave Kleikamp } 2228ac27a0ecSDave Kleikamp 2229ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2230ac27a0ecSDave Kleikamp 2231ac27a0ecSDave Kleikamp if (nr_orphans) 2232b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2233b31e1552SEric Sandeen PLURAL(nr_orphans)); 2234ac27a0ecSDave Kleikamp if (nr_truncates) 2235b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2236b31e1552SEric Sandeen PLURAL(nr_truncates)); 2237ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2238ac27a0ecSDave Kleikamp /* Turn quotas off */ 2239a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2240ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2241287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2242ac27a0ecSDave Kleikamp } 2243ac27a0ecSDave Kleikamp #endif 2244ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2245ac27a0ecSDave Kleikamp } 22460b8e58a1SAndreas Dilger 2247cd2291a4SEric Sandeen /* 2248cd2291a4SEric Sandeen * Maximal extent format file size. 2249cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2250cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2251cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2252cd2291a4SEric Sandeen * so that won't be a limiting factor. 2253cd2291a4SEric Sandeen * 2254f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2255f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2256f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2257f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2258f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2259f17722f9SLukas Czerner * 2260cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2261cd2291a4SEric Sandeen */ 2262f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2263cd2291a4SEric Sandeen { 2264cd2291a4SEric Sandeen loff_t res; 2265cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2266cd2291a4SEric Sandeen 2267cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2268f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2269cd2291a4SEric Sandeen /* 227090c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2271cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2272cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2273cd2291a4SEric Sandeen */ 2274cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2275cd2291a4SEric Sandeen 2276cd2291a4SEric Sandeen /* total blocks in file system block size */ 2277cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2278cd2291a4SEric Sandeen upper_limit <<= blkbits; 2279cd2291a4SEric Sandeen } 2280cd2291a4SEric Sandeen 2281f17722f9SLukas Czerner /* 2282f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2283f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2284f17722f9SLukas Czerner * size 2285f17722f9SLukas Czerner */ 2286f17722f9SLukas Czerner res = (1LL << 32) - 1; 2287cd2291a4SEric Sandeen res <<= blkbits; 2288cd2291a4SEric Sandeen 2289cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2290cd2291a4SEric Sandeen if (res > upper_limit) 2291cd2291a4SEric Sandeen res = upper_limit; 2292cd2291a4SEric Sandeen 2293cd2291a4SEric Sandeen return res; 2294cd2291a4SEric Sandeen } 2295ac27a0ecSDave Kleikamp 2296ac27a0ecSDave Kleikamp /* 2297cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22980fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22990fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2300ac27a0ecSDave Kleikamp */ 2301f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2302ac27a0ecSDave Kleikamp { 2303617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23040fc1b451SAneesh Kumar K.V int meta_blocks; 23050fc1b451SAneesh Kumar K.V loff_t upper_limit; 23060b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23070b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23080b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23090b8e58a1SAndreas Dilger * 23100b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23110b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23120fc1b451SAneesh Kumar K.V */ 23130fc1b451SAneesh Kumar K.V 2314f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23150fc1b451SAneesh Kumar K.V /* 231690c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23170b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23180b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23190fc1b451SAneesh Kumar K.V */ 23200fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23210fc1b451SAneesh Kumar K.V 23220fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23230fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23240fc1b451SAneesh Kumar K.V 23250fc1b451SAneesh Kumar K.V } else { 23268180a562SAneesh Kumar K.V /* 23278180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23288180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23298180a562SAneesh Kumar K.V * represent total number of blocks in 23308180a562SAneesh Kumar K.V * file system block size 23318180a562SAneesh Kumar K.V */ 23320fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23330fc1b451SAneesh Kumar K.V 23340fc1b451SAneesh Kumar K.V } 23350fc1b451SAneesh Kumar K.V 23360fc1b451SAneesh Kumar K.V /* indirect blocks */ 23370fc1b451SAneesh Kumar K.V meta_blocks = 1; 23380fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23390fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23400fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23410fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23420fc1b451SAneesh Kumar K.V 23430fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23440fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2345ac27a0ecSDave Kleikamp 2346ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2347ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2348ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2349ac27a0ecSDave Kleikamp res <<= bits; 2350ac27a0ecSDave Kleikamp if (res > upper_limit) 2351ac27a0ecSDave Kleikamp res = upper_limit; 23520fc1b451SAneesh Kumar K.V 23530fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23540fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23550fc1b451SAneesh Kumar K.V 2356ac27a0ecSDave Kleikamp return res; 2357ac27a0ecSDave Kleikamp } 2358ac27a0ecSDave Kleikamp 2359617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 236070bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2361ac27a0ecSDave Kleikamp { 2362617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2363fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2364ac27a0ecSDave Kleikamp int has_super = 0; 2365ac27a0ecSDave Kleikamp 2366ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2367ac27a0ecSDave Kleikamp 2368617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2369ac27a0ecSDave Kleikamp nr < first_meta_bg) 237070bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2371ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2372617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2373ac27a0ecSDave Kleikamp has_super = 1; 23740b8e58a1SAndreas Dilger 2375bd63f6b0SDarrick J. Wong /* 2376bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2377bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2378bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2379bd63f6b0SDarrick J. Wong * compensate. 2380bd63f6b0SDarrick J. Wong */ 2381bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2382bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2383bd63f6b0SDarrick J. Wong has_super++; 2384bd63f6b0SDarrick J. Wong 2385617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2386ac27a0ecSDave Kleikamp } 2387ac27a0ecSDave Kleikamp 2388c9de560dSAlex Tomas /** 2389c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2390c9de560dSAlex Tomas * @sbi: In memory super block info 2391c9de560dSAlex Tomas * 2392c9de560dSAlex Tomas * If we have specified it via mount option, then 2393c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2394c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2395c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2396c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2397c9de560dSAlex Tomas * 2398c9de560dSAlex Tomas */ 2399c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2400c9de560dSAlex Tomas { 2401c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2402c9de560dSAlex Tomas unsigned long stripe_width = 2403c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24043eb08658SDan Ehrenberg int ret; 2405c9de560dSAlex Tomas 2406c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24073eb08658SDan Ehrenberg ret = sbi->s_stripe; 24083eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24093eb08658SDan Ehrenberg ret = stripe_width; 24103eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24113eb08658SDan Ehrenberg ret = stride; 24123eb08658SDan Ehrenberg else 24133eb08658SDan Ehrenberg ret = 0; 2414c9de560dSAlex Tomas 24153eb08658SDan Ehrenberg /* 24163eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24173eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24183eb08658SDan Ehrenberg */ 24193eb08658SDan Ehrenberg if (ret <= 1) 24203eb08658SDan Ehrenberg ret = 0; 2421c9de560dSAlex Tomas 24223eb08658SDan Ehrenberg return ret; 2423c9de560dSAlex Tomas } 2424ac27a0ecSDave Kleikamp 24253197ebdbSTheodore Ts'o /* sysfs supprt */ 24263197ebdbSTheodore Ts'o 24273197ebdbSTheodore Ts'o struct ext4_attr { 24283197ebdbSTheodore Ts'o struct attribute attr; 24293197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24303197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24313197ebdbSTheodore Ts'o const char *, size_t); 2432f2d50a65SJan Kara union { 24333197ebdbSTheodore Ts'o int offset; 2434f2d50a65SJan Kara int deprecated_val; 2435f2d50a65SJan Kara } u; 24363197ebdbSTheodore Ts'o }; 24373197ebdbSTheodore Ts'o 243827dd4385SLukas Czerner static int parse_strtoull(const char *buf, 243927dd4385SLukas Czerner unsigned long long max, unsigned long long *value) 244027dd4385SLukas Czerner { 244127dd4385SLukas Czerner int ret; 244227dd4385SLukas Czerner 244327dd4385SLukas Czerner ret = kstrtoull(skip_spaces(buf), 0, value); 244427dd4385SLukas Czerner if (!ret && *value > max) 244527dd4385SLukas Czerner ret = -EINVAL; 244627dd4385SLukas Czerner return ret; 244727dd4385SLukas Czerner } 244827dd4385SLukas Czerner 24493197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24503197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24513197ebdbSTheodore Ts'o char *buf) 24523197ebdbSTheodore Ts'o { 24533197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24547b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24557b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24563197ebdbSTheodore Ts'o } 24573197ebdbSTheodore Ts'o 24583197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24593197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24603197ebdbSTheodore Ts'o { 24613197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24623197ebdbSTheodore Ts'o 2463f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2464f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24653197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24663197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24673197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24683197ebdbSTheodore Ts'o } 24693197ebdbSTheodore Ts'o 24703197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24713197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24723197ebdbSTheodore Ts'o { 24733197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24743197ebdbSTheodore Ts'o 2475f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2476f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24773197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2478a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24793197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2480a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24813197ebdbSTheodore Ts'o } 24823197ebdbSTheodore Ts'o 24833197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24843197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24853197ebdbSTheodore Ts'o const char *buf, size_t count) 24863197ebdbSTheodore Ts'o { 24873197ebdbSTheodore Ts'o unsigned long t; 2488e1091b15SLukas Czerner int ret; 24893197ebdbSTheodore Ts'o 2490e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2491e1091b15SLukas Czerner if (ret) 2492e1091b15SLukas Czerner return ret; 24933197ebdbSTheodore Ts'o 2494e1091b15SLukas Czerner if (t && (!is_power_of_2(t) || t > 0x40000000)) 24953197ebdbSTheodore Ts'o return -EINVAL; 24963197ebdbSTheodore Ts'o 24973197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24983197ebdbSTheodore Ts'o return count; 24993197ebdbSTheodore Ts'o } 25003197ebdbSTheodore Ts'o 25013197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25023197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25033197ebdbSTheodore Ts'o { 2504f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25053197ebdbSTheodore Ts'o 25063197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25073197ebdbSTheodore Ts'o } 25083197ebdbSTheodore Ts'o 25093197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25103197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25113197ebdbSTheodore Ts'o const char *buf, size_t count) 25123197ebdbSTheodore Ts'o { 2513f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25143197ebdbSTheodore Ts'o unsigned long t; 2515e1091b15SLukas Czerner int ret; 25163197ebdbSTheodore Ts'o 2517e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2518e1091b15SLukas Czerner if (ret) 2519e1091b15SLukas Czerner return ret; 25203197ebdbSTheodore Ts'o *ui = t; 25213197ebdbSTheodore Ts'o return count; 25223197ebdbSTheodore Ts'o } 25233197ebdbSTheodore Ts'o 252452c198c6SLukas Czerner static ssize_t es_ui_show(struct ext4_attr *a, 252552c198c6SLukas Czerner struct ext4_sb_info *sbi, char *buf) 252652c198c6SLukas Czerner { 252752c198c6SLukas Czerner 252852c198c6SLukas Czerner unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) + 252952c198c6SLukas Czerner a->u.offset); 253052c198c6SLukas Czerner 253152c198c6SLukas Czerner return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 253252c198c6SLukas Czerner } 253352c198c6SLukas Czerner 253427dd4385SLukas Czerner static ssize_t reserved_clusters_show(struct ext4_attr *a, 253527dd4385SLukas Czerner struct ext4_sb_info *sbi, char *buf) 253627dd4385SLukas Czerner { 253727dd4385SLukas Czerner return snprintf(buf, PAGE_SIZE, "%llu\n", 253827dd4385SLukas Czerner (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); 253927dd4385SLukas Czerner } 254027dd4385SLukas Czerner 254127dd4385SLukas Czerner static ssize_t reserved_clusters_store(struct ext4_attr *a, 254227dd4385SLukas Czerner struct ext4_sb_info *sbi, 254327dd4385SLukas Czerner const char *buf, size_t count) 254427dd4385SLukas Czerner { 254527dd4385SLukas Czerner unsigned long long val; 254627dd4385SLukas Czerner int ret; 254727dd4385SLukas Czerner 254827dd4385SLukas Czerner if (parse_strtoull(buf, -1ULL, &val)) 254927dd4385SLukas Czerner return -EINVAL; 255027dd4385SLukas Czerner ret = ext4_reserve_clusters(sbi, val); 255127dd4385SLukas Czerner 255227dd4385SLukas Czerner return ret ? ret : count; 255327dd4385SLukas Czerner } 255427dd4385SLukas Czerner 25552c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25562c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25572c0544b2STheodore Ts'o const char *buf, size_t count) 25582c0544b2STheodore Ts'o { 25592c0544b2STheodore Ts'o int len = count; 25602c0544b2STheodore Ts'o 25612c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25622c0544b2STheodore Ts'o return -EPERM; 25632c0544b2STheodore Ts'o 25642c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25652c0544b2STheodore Ts'o len--; 25662c0544b2STheodore Ts'o 25672c0544b2STheodore Ts'o if (len) 25682c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25692c0544b2STheodore Ts'o return count; 25702c0544b2STheodore Ts'o } 25712c0544b2STheodore Ts'o 2572f2d50a65SJan Kara static ssize_t sbi_deprecated_show(struct ext4_attr *a, 2573f2d50a65SJan Kara struct ext4_sb_info *sbi, char *buf) 2574f2d50a65SJan Kara { 2575f2d50a65SJan Kara return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); 2576f2d50a65SJan Kara } 2577f2d50a65SJan Kara 25783197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25793197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25803197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25813197ebdbSTheodore Ts'o .show = _show, \ 25823197ebdbSTheodore Ts'o .store = _store, \ 2583f2d50a65SJan Kara .u = { \ 25843197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname),\ 2585f2d50a65SJan Kara }, \ 25863197ebdbSTheodore Ts'o } 258752c198c6SLukas Czerner 258852c198c6SLukas Czerner #define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \ 258952c198c6SLukas Czerner static struct ext4_attr ext4_attr_##_name = { \ 259052c198c6SLukas Czerner .attr = {.name = __stringify(_name), .mode = _mode }, \ 259152c198c6SLukas Czerner .show = _show, \ 259252c198c6SLukas Czerner .store = _store, \ 259352c198c6SLukas Czerner .u = { \ 259452c198c6SLukas Czerner .offset = offsetof(struct ext4_super_block, _elname), \ 259552c198c6SLukas Czerner }, \ 259652c198c6SLukas Czerner } 259752c198c6SLukas Czerner 25983197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25993197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 26003197ebdbSTheodore Ts'o 2601857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 26023197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 26033197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 260452c198c6SLukas Czerner 260552c198c6SLukas Czerner #define EXT4_RO_ATTR_ES_UI(name, elname) \ 260652c198c6SLukas Czerner EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname) 26073197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 26083197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 260952c198c6SLukas Czerner 26103197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 2611f2d50a65SJan Kara #define EXT4_DEPRECATED_ATTR(_name, _val) \ 2612f2d50a65SJan Kara static struct ext4_attr ext4_attr_##_name = { \ 2613f2d50a65SJan Kara .attr = {.name = __stringify(_name), .mode = 0444 }, \ 2614f2d50a65SJan Kara .show = sbi_deprecated_show, \ 2615f2d50a65SJan Kara .u = { \ 2616f2d50a65SJan Kara .deprecated_val = _val, \ 2617f2d50a65SJan Kara }, \ 2618f2d50a65SJan Kara } 26193197ebdbSTheodore Ts'o 26203197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 26213197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 26223197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 262327dd4385SLukas Czerner EXT4_RW_ATTR(reserved_clusters); 26243197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 26253197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 262611013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 26273197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 26283197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 26293197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 26303197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26313197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26323197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 2633f2d50a65SJan Kara EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); 263467a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 26352c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 2636efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 2637efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 2638efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 2639efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 2640efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 2641efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 264252c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 264352c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); 264452c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); 26453197ebdbSTheodore Ts'o 26463197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26473197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26483197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26493197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 265027dd4385SLukas Czerner ATTR_LIST(reserved_clusters), 26513197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 265211013911SAndreas Dilger ATTR_LIST(inode_goal), 26533197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26543197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26553197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26563197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26573197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26583197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 265955138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 266067a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 26612c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 2662efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 2663efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_burst), 2664efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 2665efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 2666efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 2667efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 266852c198c6SLukas Czerner ATTR_LIST(errors_count), 266952c198c6SLukas Czerner ATTR_LIST(first_error_time), 267052c198c6SLukas Czerner ATTR_LIST(last_error_time), 26713197ebdbSTheodore Ts'o NULL, 26723197ebdbSTheodore Ts'o }; 26733197ebdbSTheodore Ts'o 2674857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2675857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 267627ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 26775e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2678857ac889SLukas Czerner 2679857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2680857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 268127ee40dfSLukas Czerner ATTR_LIST(batched_discard), 26825e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2683857ac889SLukas Czerner NULL, 2684857ac889SLukas Czerner }; 2685857ac889SLukas Czerner 26863197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 26873197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 26883197ebdbSTheodore Ts'o { 26893197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26903197ebdbSTheodore Ts'o s_kobj); 26913197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26923197ebdbSTheodore Ts'o 26933197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 26943197ebdbSTheodore Ts'o } 26953197ebdbSTheodore Ts'o 26963197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 26973197ebdbSTheodore Ts'o struct attribute *attr, 26983197ebdbSTheodore Ts'o const char *buf, size_t len) 26993197ebdbSTheodore Ts'o { 27003197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27013197ebdbSTheodore Ts'o s_kobj); 27023197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27033197ebdbSTheodore Ts'o 27043197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 27053197ebdbSTheodore Ts'o } 27063197ebdbSTheodore Ts'o 27073197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 27083197ebdbSTheodore Ts'o { 27093197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27103197ebdbSTheodore Ts'o s_kobj); 27113197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 27123197ebdbSTheodore Ts'o } 27133197ebdbSTheodore Ts'o 271452cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 27153197ebdbSTheodore Ts'o .show = ext4_attr_show, 27163197ebdbSTheodore Ts'o .store = ext4_attr_store, 27173197ebdbSTheodore Ts'o }; 27183197ebdbSTheodore Ts'o 27193197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 27203197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 27213197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 27223197ebdbSTheodore Ts'o .release = ext4_sb_release, 27233197ebdbSTheodore Ts'o }; 27243197ebdbSTheodore Ts'o 2725857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2726857ac889SLukas Czerner { 2727857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2728857ac889SLukas Czerner } 2729857ac889SLukas Czerner 2730c7f72543SLukas Czerner static ssize_t ext4_feat_show(struct kobject *kobj, 2731c7f72543SLukas Czerner struct attribute *attr, char *buf) 2732c7f72543SLukas Czerner { 2733c7f72543SLukas Czerner return snprintf(buf, PAGE_SIZE, "supported\n"); 2734c7f72543SLukas Czerner } 2735c7f72543SLukas Czerner 2736c7f72543SLukas Czerner /* 2737c7f72543SLukas Czerner * We can not use ext4_attr_show/store because it relies on the kobject 2738c7f72543SLukas Czerner * being embedded in the ext4_sb_info structure which is definitely not 2739c7f72543SLukas Czerner * true in this case. 2740c7f72543SLukas Czerner */ 2741c7f72543SLukas Czerner static const struct sysfs_ops ext4_feat_ops = { 2742c7f72543SLukas Czerner .show = ext4_feat_show, 2743c7f72543SLukas Czerner .store = NULL, 2744c7f72543SLukas Czerner }; 2745c7f72543SLukas Czerner 2746857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2747857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2748c7f72543SLukas Czerner .sysfs_ops = &ext4_feat_ops, 2749857ac889SLukas Czerner .release = ext4_feat_release, 2750857ac889SLukas Czerner }; 2751857ac889SLukas Czerner 2752a13fb1a4SEric Sandeen /* 2753a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2754a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2755a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2756a13fb1a4SEric Sandeen * 0 if it cannot be. 2757a13fb1a4SEric Sandeen */ 2758a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2759a13fb1a4SEric Sandeen { 2760a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2761a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2762a13fb1a4SEric Sandeen "Couldn't mount because of " 2763a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2764a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2765a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2766a13fb1a4SEric Sandeen return 0; 2767a13fb1a4SEric Sandeen } 2768a13fb1a4SEric Sandeen 2769a13fb1a4SEric Sandeen if (readonly) 2770a13fb1a4SEric Sandeen return 1; 2771a13fb1a4SEric Sandeen 2772a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2773a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2774a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2775a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2776a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2777a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2778a13fb1a4SEric Sandeen return 0; 2779a13fb1a4SEric Sandeen } 2780a13fb1a4SEric Sandeen /* 2781a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2782a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2783a13fb1a4SEric Sandeen */ 2784a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2785a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2786a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2787a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2788a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2789a13fb1a4SEric Sandeen return 0; 2790a13fb1a4SEric Sandeen } 2791a13fb1a4SEric Sandeen } 2792bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2793bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2794bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2795bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2796bab08ab9STheodore Ts'o "extents feature\n"); 2797bab08ab9STheodore Ts'o return 0; 2798bab08ab9STheodore Ts'o } 27997c319d32SAditya Kali 28007c319d32SAditya Kali #ifndef CONFIG_QUOTA 28017c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 28027c319d32SAditya Kali !readonly) { 28037c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28047c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28057c319d32SAditya Kali "without CONFIG_QUOTA"); 28067c319d32SAditya Kali return 0; 28077c319d32SAditya Kali } 28087c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2809a13fb1a4SEric Sandeen return 1; 2810a13fb1a4SEric Sandeen } 2811a13fb1a4SEric Sandeen 281266e61a9eSTheodore Ts'o /* 281366e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 281466e61a9eSTheodore Ts'o * on the file system 281566e61a9eSTheodore Ts'o */ 281666e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 281766e61a9eSTheodore Ts'o { 281866e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 281966e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 282066e61a9eSTheodore Ts'o struct ext4_super_block *es; 282166e61a9eSTheodore Ts'o 282266e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 282366e61a9eSTheodore Ts'o es = sbi->s_es; 282466e61a9eSTheodore Ts'o 282566e61a9eSTheodore Ts'o if (es->s_error_count) 2826ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2827ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 282866e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 282966e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2830ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 283166e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 283266e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 283366e61a9eSTheodore Ts'o es->s_first_error_func, 283466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 283566e61a9eSTheodore Ts'o if (es->s_first_error_ino) 283666e61a9eSTheodore Ts'o printk(": inode %u", 283766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 283866e61a9eSTheodore Ts'o if (es->s_first_error_block) 283966e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 284066e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 284166e61a9eSTheodore Ts'o printk("\n"); 284266e61a9eSTheodore Ts'o } 284366e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2844ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 284566e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 284666e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 284766e61a9eSTheodore Ts'o es->s_last_error_func, 284866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 284966e61a9eSTheodore Ts'o if (es->s_last_error_ino) 285066e61a9eSTheodore Ts'o printk(": inode %u", 285166e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 285266e61a9eSTheodore Ts'o if (es->s_last_error_block) 285366e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 285466e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 285566e61a9eSTheodore Ts'o printk("\n"); 285666e61a9eSTheodore Ts'o } 285766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 285866e61a9eSTheodore Ts'o } 285966e61a9eSTheodore Ts'o 2860bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2861bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2862bfff6873SLukas Czerner { 2863bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2864bfff6873SLukas Czerner ext4_group_t group, ngroups; 2865bfff6873SLukas Czerner struct super_block *sb; 2866bfff6873SLukas Czerner unsigned long timeout = 0; 2867bfff6873SLukas Czerner int ret = 0; 2868bfff6873SLukas Czerner 2869bfff6873SLukas Czerner sb = elr->lr_super; 2870bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2871bfff6873SLukas Czerner 28728e8ad8a5SJan Kara sb_start_write(sb); 2873bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2874bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2875bfff6873SLukas Czerner if (!gdp) { 2876bfff6873SLukas Czerner ret = 1; 2877bfff6873SLukas Czerner break; 2878bfff6873SLukas Czerner } 2879bfff6873SLukas Czerner 2880bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2881bfff6873SLukas Czerner break; 2882bfff6873SLukas Czerner } 2883bfff6873SLukas Czerner 28847f511862STheodore Ts'o if (group >= ngroups) 2885bfff6873SLukas Czerner ret = 1; 2886bfff6873SLukas Czerner 2887bfff6873SLukas Czerner if (!ret) { 2888bfff6873SLukas Czerner timeout = jiffies; 2889bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2890bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2891bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 289251ce6511SLukas Czerner timeout = (jiffies - timeout) * 289351ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2894bfff6873SLukas Czerner elr->lr_timeout = timeout; 2895bfff6873SLukas Czerner } 2896bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2897bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2898bfff6873SLukas Czerner } 28998e8ad8a5SJan Kara sb_end_write(sb); 2900bfff6873SLukas Czerner 2901bfff6873SLukas Czerner return ret; 2902bfff6873SLukas Czerner } 2903bfff6873SLukas Czerner 2904bfff6873SLukas Czerner /* 2905bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29064ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2907bfff6873SLukas Czerner */ 2908bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2909bfff6873SLukas Czerner { 2910bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2911bfff6873SLukas Czerner 2912bfff6873SLukas Czerner if (!elr) 2913bfff6873SLukas Czerner return; 2914bfff6873SLukas Czerner 2915bfff6873SLukas Czerner sbi = elr->lr_sbi; 2916bfff6873SLukas Czerner 2917bfff6873SLukas Czerner list_del(&elr->lr_request); 2918bfff6873SLukas Czerner sbi->s_li_request = NULL; 2919bfff6873SLukas Czerner kfree(elr); 2920bfff6873SLukas Czerner } 2921bfff6873SLukas Czerner 2922bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2923bfff6873SLukas Czerner { 29241bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29251bb933fbSLukas Czerner if (!ext4_li_info) { 29261bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2927bfff6873SLukas Czerner return; 29281bb933fbSLukas Czerner } 2929bfff6873SLukas Czerner 2930bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29311bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2932bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29331bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2934bfff6873SLukas Czerner } 2935bfff6873SLukas Czerner 29368f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29378f1f7453SEric Sandeen 2938bfff6873SLukas Czerner /* 2939bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2940bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2941bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2942bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2943bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2944bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2945bfff6873SLukas Czerner * next waking time and put itself into sleep. 2946bfff6873SLukas Czerner */ 2947bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2948bfff6873SLukas Czerner { 2949bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2950bfff6873SLukas Czerner struct list_head *pos, *n; 2951bfff6873SLukas Czerner struct ext4_li_request *elr; 29524ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2953bfff6873SLukas Czerner 2954bfff6873SLukas Czerner BUG_ON(NULL == eli); 2955bfff6873SLukas Czerner 2956bfff6873SLukas Czerner cont_thread: 2957bfff6873SLukas Czerner while (true) { 2958bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2959bfff6873SLukas Czerner 2960bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2961bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2962bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2963bfff6873SLukas Czerner goto exit_thread; 2964bfff6873SLukas Czerner } 2965bfff6873SLukas Czerner 2966bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2967bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2968bfff6873SLukas Czerner lr_request); 2969bfff6873SLukas Czerner 2970b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2971b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2972b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2973bfff6873SLukas Czerner ext4_remove_li_request(elr); 2974bfff6873SLukas Czerner continue; 2975bfff6873SLukas Czerner } 2976b2c78cd0STheodore Ts'o } 2977bfff6873SLukas Czerner 2978bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2979bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2980bfff6873SLukas Czerner } 2981bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2982bfff6873SLukas Czerner 2983a0acae0eSTejun Heo try_to_freeze(); 2984bfff6873SLukas Czerner 29854ed5c033SLukas Czerner cur = jiffies; 29864ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2987f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2988bfff6873SLukas Czerner cond_resched(); 2989bfff6873SLukas Czerner continue; 2990bfff6873SLukas Czerner } 2991bfff6873SLukas Czerner 29924ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 29934ed5c033SLukas Czerner 29948f1f7453SEric Sandeen if (kthread_should_stop()) { 29958f1f7453SEric Sandeen ext4_clear_request_list(); 29968f1f7453SEric Sandeen goto exit_thread; 29978f1f7453SEric Sandeen } 2998bfff6873SLukas Czerner } 2999bfff6873SLukas Czerner 3000bfff6873SLukas Czerner exit_thread: 3001bfff6873SLukas Czerner /* 3002bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3003bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3004bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3005bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3006bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3007bfff6873SLukas Czerner * new one. 3008bfff6873SLukas Czerner */ 3009bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3010bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3011bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3012bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3013bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3014bfff6873SLukas Czerner goto cont_thread; 3015bfff6873SLukas Czerner } 3016bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3017bfff6873SLukas Czerner kfree(ext4_li_info); 3018bfff6873SLukas Czerner ext4_li_info = NULL; 3019bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3020bfff6873SLukas Czerner 3021bfff6873SLukas Czerner return 0; 3022bfff6873SLukas Czerner } 3023bfff6873SLukas Czerner 3024bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3025bfff6873SLukas Czerner { 3026bfff6873SLukas Czerner struct list_head *pos, *n; 3027bfff6873SLukas Czerner struct ext4_li_request *elr; 3028bfff6873SLukas Czerner 3029bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3030bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3031bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3032bfff6873SLukas Czerner lr_request); 3033bfff6873SLukas Czerner ext4_remove_li_request(elr); 3034bfff6873SLukas Czerner } 3035bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3036bfff6873SLukas Czerner } 3037bfff6873SLukas Czerner 3038bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3039bfff6873SLukas Czerner { 30408f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30418f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30428f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30438f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3044bfff6873SLukas Czerner ext4_clear_request_list(); 3045bfff6873SLukas Czerner kfree(ext4_li_info); 3046bfff6873SLukas Czerner ext4_li_info = NULL; 304792b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3048bfff6873SLukas Czerner "initialization thread\n", 3049bfff6873SLukas Czerner err); 3050bfff6873SLukas Czerner return err; 3051bfff6873SLukas Czerner } 3052bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3053bfff6873SLukas Czerner return 0; 3054bfff6873SLukas Czerner } 3055bfff6873SLukas Czerner 3056bfff6873SLukas Czerner /* 3057bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3058bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3059bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3060bfff6873SLukas Czerner * groups and return total number of groups. 3061bfff6873SLukas Czerner */ 3062bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3063bfff6873SLukas Czerner { 3064bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3065bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3066bfff6873SLukas Czerner 3067bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3068bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3069bfff6873SLukas Czerner if (!gdp) 3070bfff6873SLukas Czerner continue; 3071bfff6873SLukas Czerner 3072bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3073bfff6873SLukas Czerner break; 3074bfff6873SLukas Czerner } 3075bfff6873SLukas Czerner 3076bfff6873SLukas Czerner return group; 3077bfff6873SLukas Czerner } 3078bfff6873SLukas Czerner 3079bfff6873SLukas Czerner static int ext4_li_info_new(void) 3080bfff6873SLukas Czerner { 3081bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3082bfff6873SLukas Czerner 3083bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3084bfff6873SLukas Czerner if (!eli) 3085bfff6873SLukas Czerner return -ENOMEM; 3086bfff6873SLukas Czerner 3087bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3088bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3089bfff6873SLukas Czerner 3090bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3091bfff6873SLukas Czerner 3092bfff6873SLukas Czerner ext4_li_info = eli; 3093bfff6873SLukas Czerner 3094bfff6873SLukas Czerner return 0; 3095bfff6873SLukas Czerner } 3096bfff6873SLukas Czerner 3097bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3098bfff6873SLukas Czerner ext4_group_t start) 3099bfff6873SLukas Czerner { 3100bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3101bfff6873SLukas Czerner struct ext4_li_request *elr; 3102bfff6873SLukas Czerner 3103bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3104bfff6873SLukas Czerner if (!elr) 3105bfff6873SLukas Czerner return NULL; 3106bfff6873SLukas Czerner 3107bfff6873SLukas Czerner elr->lr_super = sb; 3108bfff6873SLukas Czerner elr->lr_sbi = sbi; 3109bfff6873SLukas Czerner elr->lr_next_group = start; 3110bfff6873SLukas Czerner 3111bfff6873SLukas Czerner /* 3112bfff6873SLukas Czerner * Randomize first schedule time of the request to 3113bfff6873SLukas Czerner * spread the inode table initialization requests 3114bfff6873SLukas Czerner * better. 3115bfff6873SLukas Czerner */ 3116dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3117dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3118bfff6873SLukas Czerner return elr; 3119bfff6873SLukas Czerner } 3120bfff6873SLukas Czerner 31217f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3122bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3123bfff6873SLukas Czerner { 3124bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31257f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3126bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 31276c5a6cb9SAndrew Morton int ret = 0; 3128bfff6873SLukas Czerner 31297f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 313051ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 313151ce6511SLukas Czerner /* 313251ce6511SLukas Czerner * Reset timeout so it can be computed again, because 313351ce6511SLukas Czerner * s_li_wait_mult might have changed. 313451ce6511SLukas Czerner */ 313551ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31367f511862STheodore Ts'o goto out; 313751ce6511SLukas Czerner } 3138bfff6873SLukas Czerner 3139bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3140bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 314155ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31427f511862STheodore Ts'o goto out; 3143bfff6873SLukas Czerner 3144bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31457f511862STheodore Ts'o if (!elr) { 31467f511862STheodore Ts'o ret = -ENOMEM; 31477f511862STheodore Ts'o goto out; 31487f511862STheodore Ts'o } 3149bfff6873SLukas Czerner 3150bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3151bfff6873SLukas Czerner ret = ext4_li_info_new(); 3152bfff6873SLukas Czerner if (ret) 3153bfff6873SLukas Czerner goto out; 3154bfff6873SLukas Czerner } 3155bfff6873SLukas Czerner 3156bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3157bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3158bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3159bfff6873SLukas Czerner 3160bfff6873SLukas Czerner sbi->s_li_request = elr; 316146e4690bSTao Ma /* 316246e4690bSTao Ma * set elr to NULL here since it has been inserted to 316346e4690bSTao Ma * the request_list and the removal and free of it is 316446e4690bSTao Ma * handled by ext4_clear_request_list from now on. 316546e4690bSTao Ma */ 316646e4690bSTao Ma elr = NULL; 3167bfff6873SLukas Czerner 3168bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3169bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3170bfff6873SLukas Czerner if (ret) 3171bfff6873SLukas Czerner goto out; 3172bfff6873SLukas Czerner } 3173bfff6873SLukas Czerner out: 3174bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3175beed5ecbSNicolas Kaiser if (ret) 3176bfff6873SLukas Czerner kfree(elr); 3177bfff6873SLukas Czerner return ret; 3178bfff6873SLukas Czerner } 3179bfff6873SLukas Czerner 3180bfff6873SLukas Czerner /* 3181bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3182bfff6873SLukas Czerner * module unload. 3183bfff6873SLukas Czerner */ 3184bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3185bfff6873SLukas Czerner { 3186bfff6873SLukas Czerner /* 3187bfff6873SLukas Czerner * If thread exited earlier 3188bfff6873SLukas Czerner * there's nothing to be done. 3189bfff6873SLukas Czerner */ 31908f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3191bfff6873SLukas Czerner return; 3192bfff6873SLukas Czerner 31938f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3194bfff6873SLukas Czerner } 3195bfff6873SLukas Czerner 319625ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 319725ed6e8aSDarrick J. Wong { 319825ed6e8aSDarrick J. Wong int ret = 1; 319925ed6e8aSDarrick J. Wong int compat, incompat; 320025ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 320125ed6e8aSDarrick J. Wong 320225ed6e8aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 320325ed6e8aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 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 */ 3511a9c47317SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3512a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 3513a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3514a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3515a9c47317SDarrick J. Wong 3516ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3517ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3518fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3519617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3520fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 352187f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3522fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3523617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3524fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3525ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3526fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 352703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3528fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35292e7842b8SHugh Dickins #endif 3530617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3531fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3532617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3533fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3534617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3535fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3536ac27a0ecSDave Kleikamp 3537617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3538fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3539bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3540fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3541bb4f397aSAneesh Kumar K.V else 3542fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 354345f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3544fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35458b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3546fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3547ac27a0ecSDave Kleikamp 354808cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 354908cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 355030773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 355130773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 355230773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3553ac27a0ecSDave Kleikamp 35548b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3555fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3556ac27a0ecSDave Kleikamp 35571e2462f9SMingming Cao /* 3558dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3559dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3560dd919b98SAneesh Kumar K.V */ 3561bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35628b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3563fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3564dd919b98SAneesh Kumar K.V 356551ce6511SLukas Czerner /* 356651ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 356751ce6511SLukas Czerner * no mount option specified. 356851ce6511SLukas Czerner */ 356951ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 357051ce6511SLukas Czerner 35718b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3572661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 35738b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35748b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35758b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 35768b67f04aSTheodore Ts'o } 35775a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3578b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3579661aa520SEric Sandeen &journal_ioprio, 0)) 3580ac27a0ecSDave Kleikamp goto failed_mount; 3581ac27a0ecSDave Kleikamp 358256889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 358356889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 358456889787STheodore Ts'o "with data=journal disables delayed " 358556889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 358656889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 358756889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 358856889787STheodore Ts'o "both data=journal and delalloc"); 358956889787STheodore Ts'o goto failed_mount; 359056889787STheodore Ts'o } 359156889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 359256889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 35936ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 359456889787STheodore Ts'o goto failed_mount; 359556889787STheodore Ts'o } 359656889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 359756889787STheodore Ts'o clear_opt(sb, DELALLOC); 359856889787STheodore Ts'o } 359956889787STheodore Ts'o 3600ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3601482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3602ac27a0ecSDave Kleikamp 3603617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3604617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3605617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3606617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3607b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3608b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3609b31e1552SEric Sandeen "running e2fsck is recommended"); 3610469108ffSTheodore Tso 3611ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3612ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3613ed3654ebSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, 3614ed3654ebSTheodore Ts'o EXT4_FEATURE_INCOMPAT_64BIT)) { 3615ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3616ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3617ed3654ebSTheodore Ts'o goto failed_mount; 3618ed3654ebSTheodore Ts'o } 3619ed3654ebSTheodore Ts'o } 3620ed3654ebSTheodore Ts'o 36212035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36222035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36232035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36242035e776STheodore Ts'o "using the ext4 subsystem"); 36252035e776STheodore Ts'o else { 36262035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36272035e776STheodore Ts'o "to feature incompatibilities"); 36282035e776STheodore Ts'o goto failed_mount; 36292035e776STheodore Ts'o } 36302035e776STheodore Ts'o } 36312035e776STheodore Ts'o 36322035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36332035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36342035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36352035e776STheodore Ts'o "using the ext4 subsystem"); 36362035e776STheodore Ts'o else { 36372035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36382035e776STheodore Ts'o "to feature incompatibilities"); 36392035e776STheodore Ts'o goto failed_mount; 36402035e776STheodore Ts'o } 36412035e776STheodore Ts'o } 36422035e776STheodore Ts'o 3643469108ffSTheodore Tso /* 3644ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3645ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3646ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3647ac27a0ecSDave Kleikamp */ 3648a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3649ac27a0ecSDave Kleikamp goto failed_mount; 3650a13fb1a4SEric Sandeen 3651261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3652617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3653617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3654b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3655b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3656ac27a0ecSDave Kleikamp goto failed_mount; 3657ac27a0ecSDave Kleikamp } 3658ac27a0ecSDave Kleikamp 3659ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3660ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3661ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3662b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3663ce40733cSAneesh Kumar K.V blocksize); 3664ac27a0ecSDave Kleikamp goto failed_mount; 3665ac27a0ecSDave Kleikamp } 3666ac27a0ecSDave Kleikamp 3667ac27a0ecSDave Kleikamp brelse(bh); 366870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 366970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3670a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3671ac27a0ecSDave Kleikamp if (!bh) { 3672b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3673b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3674ac27a0ecSDave Kleikamp goto failed_mount; 3675ac27a0ecSDave Kleikamp } 36762716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3677ac27a0ecSDave Kleikamp sbi->s_es = es; 3678617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3679b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3680b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3681ac27a0ecSDave Kleikamp goto failed_mount; 3682ac27a0ecSDave Kleikamp } 3683ac27a0ecSDave Kleikamp } 3684ac27a0ecSDave Kleikamp 3685a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3686a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3687f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3688f287a1a5STheodore Ts'o has_huge_files); 3689f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3690ac27a0ecSDave Kleikamp 3691617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3692617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3693617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3694ac27a0ecSDave Kleikamp } else { 3695ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3696ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3697617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 36981330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3699ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3700b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3701b31e1552SEric Sandeen "unsupported inode size: %d", 3702ac27a0ecSDave Kleikamp sbi->s_inode_size); 3703ac27a0ecSDave Kleikamp goto failed_mount; 3704ac27a0ecSDave Kleikamp } 3705ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3706ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3707ac27a0ecSDave Kleikamp } 37080b8e58a1SAndreas Dilger 37090d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 37100d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 37118fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 37120d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3713d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3714b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3715b31e1552SEric Sandeen "unsupported descriptor size %lu", 37160d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37170d1ee42fSAlexandre Ratchov goto failed_mount; 37180d1ee42fSAlexandre Ratchov } 37190d1ee42fSAlexandre Ratchov } else 37200d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37210b8e58a1SAndreas Dilger 3722ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3723ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3724b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3725617ba13bSMingming Cao goto cantfind_ext4; 37260b8e58a1SAndreas Dilger 3727617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3728ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3729617ba13bSMingming Cao goto cantfind_ext4; 3730ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3731ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37320d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3733ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3734ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3735e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3736e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37370b8e58a1SAndreas Dilger 3738ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3739ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3740ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 374123301410STheodore Ts'o if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { 3742f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3743f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3744f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3745f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3746f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 374723301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 374823301410STheodore Ts'o es->s_flags |= 374923301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3750f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3751f99b2589STheodore Ts'o #else 375223301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 375323301410STheodore Ts'o es->s_flags |= 375423301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3755f99b2589STheodore Ts'o #endif 3756f99b2589STheodore Ts'o } 375723301410STheodore Ts'o } 3758ac27a0ecSDave Kleikamp 3759281b5995STheodore Ts'o /* Handle clustersize */ 3760281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3761281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3762281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3763281b5995STheodore Ts'o if (has_bigalloc) { 3764281b5995STheodore Ts'o if (clustersize < blocksize) { 3765281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3766281b5995STheodore Ts'o "cluster size (%d) smaller than " 3767281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3768281b5995STheodore Ts'o goto failed_mount; 3769281b5995STheodore Ts'o } 3770281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3771281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3772281b5995STheodore Ts'o sbi->s_clusters_per_group = 3773281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3774281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3775281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3776281b5995STheodore Ts'o "#clusters per group too big: %lu", 3777281b5995STheodore Ts'o sbi->s_clusters_per_group); 3778281b5995STheodore Ts'o goto failed_mount; 3779281b5995STheodore Ts'o } 3780281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3781281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3782281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3783281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3784281b5995STheodore Ts'o sbi->s_blocks_per_group, 3785281b5995STheodore Ts'o sbi->s_clusters_per_group); 3786281b5995STheodore Ts'o goto failed_mount; 3787281b5995STheodore Ts'o } 3788281b5995STheodore Ts'o } else { 3789281b5995STheodore Ts'o if (clustersize != blocksize) { 3790281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3791281b5995STheodore Ts'o "block size (%d)", clustersize, 3792281b5995STheodore Ts'o blocksize); 3793281b5995STheodore Ts'o clustersize = blocksize; 3794281b5995STheodore Ts'o } 3795ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3796b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3797b31e1552SEric Sandeen "#blocks per group too big: %lu", 3798ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3799ac27a0ecSDave Kleikamp goto failed_mount; 3800ac27a0ecSDave Kleikamp } 3801281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3802281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3803281b5995STheodore Ts'o } 3804281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3805281b5995STheodore Ts'o 3806ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3807b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3808b31e1552SEric Sandeen "#inodes per group too big: %lu", 3809ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3810ac27a0ecSDave Kleikamp goto failed_mount; 3811ac27a0ecSDave Kleikamp } 3812ac27a0ecSDave Kleikamp 3813960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3814960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3815960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3816960fd856STheodore Ts'o 3817bf43d84bSEric Sandeen /* 3818bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3819bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3820bf43d84bSEric Sandeen */ 38215a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 382230ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38235a9ae68aSDarrick J. Wong if (err) { 3824b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3825bf43d84bSEric Sandeen " too large to mount safely on this system"); 3826ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 382790c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3828ac27a0ecSDave Kleikamp goto failed_mount; 3829ac27a0ecSDave Kleikamp } 3830ac27a0ecSDave Kleikamp 3831617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3832617ba13bSMingming Cao goto cantfind_ext4; 3833e7c95593SEric Sandeen 38340f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38350f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38360f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3837b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3838b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38390f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38400f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38410f2ddca6SFrom: Thiemo Nagel } 38420f2ddca6SFrom: Thiemo Nagel 38434ec11028STheodore Ts'o /* 38444ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38454ec11028STheodore Ts'o * of the filesystem. 38464ec11028STheodore Ts'o */ 38474ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3848b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3849b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3850e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38514ec11028STheodore Ts'o ext4_blocks_count(es)); 3852e7c95593SEric Sandeen goto failed_mount; 3853e7c95593SEric Sandeen } 3854bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3855bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3856bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3857bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 38584ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3859b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 38604ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3861b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 38624ec11028STheodore Ts'o ext4_blocks_count(es), 38634ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 38644ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 38654ec11028STheodore Ts'o goto failed_mount; 38664ec11028STheodore Ts'o } 3867bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3868fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3869fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3870617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3871617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3872f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3873f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3874ac27a0ecSDave Kleikamp GFP_KERNEL); 3875ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3876b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 38772cde417dSTheodore Ts'o ret = -ENOMEM; 3878ac27a0ecSDave Kleikamp goto failed_mount; 3879ac27a0ecSDave Kleikamp } 3880ac27a0ecSDave Kleikamp 38819f6200bbSTheodore Ts'o if (ext4_proc_root) 38829f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3883240799cdSTheodore Ts'o 388466acdcf4STheodore Ts'o if (sbi->s_proc) 388566acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 388666acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 388766acdcf4STheodore Ts'o 3888705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3889ac27a0ecSDave Kleikamp 3890ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 389170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3892a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3893ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3894b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3895b31e1552SEric Sandeen "can't read group descriptor %d", i); 3896ac27a0ecSDave Kleikamp db_count = i; 3897ac27a0ecSDave Kleikamp goto failed_mount2; 3898ac27a0ecSDave Kleikamp } 3899ac27a0ecSDave Kleikamp } 3900bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3901b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3902f9ae9cf5STheodore Ts'o goto failed_mount2; 3903ac27a0ecSDave Kleikamp } 3904772cb7c8SJose R. Santos 3905f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3906ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3907ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3908ac27a0ecSDave Kleikamp 390904496411STao Ma init_timer(&sbi->s_err_report); 391004496411STao Ma sbi->s_err_report.function = print_daily_error_info; 391104496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 391204496411STao Ma 3913a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3914eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3915ce7e010aSTheodore Ts'o goto failed_mount3; 3916ce7e010aSTheodore Ts'o 3917c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 391867a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3919c9de560dSAlex Tomas 3920f9ae9cf5STheodore Ts'o /* 3921f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3922f9ae9cf5STheodore Ts'o */ 3923f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3924617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3925617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3926ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3927617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3928262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 39297c319d32SAditya Kali sb->s_qcop = &ext4_qctl_sysfile_operations; 3930262b4662SJan Kara else 3931262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3932ac27a0ecSDave Kleikamp #endif 3933f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3934f2fa2ffcSAneesh Kumar K.V 3935ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39363b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3937ac27a0ecSDave Kleikamp 3938ac27a0ecSDave Kleikamp sb->s_root = NULL; 3939ac27a0ecSDave Kleikamp 3940ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3941617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3942617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3943ac27a0ecSDave Kleikamp 3944c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3945c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3946c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3947c5e06d10SJohann Lombardi goto failed_mount3; 3948c5e06d10SJohann Lombardi 3949ac27a0ecSDave Kleikamp /* 3950ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3951ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3952ac27a0ecSDave Kleikamp */ 3953ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3954617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3955617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3956ac27a0ecSDave Kleikamp goto failed_mount3; 39570390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 39580390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3959b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3960b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3961744692dcSJiaying Zhang goto failed_mount_wq; 3962ac27a0ecSDave Kleikamp } else { 3963fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 39640390131bSFrank Mayhar sbi->s_journal = NULL; 39650390131bSFrank Mayhar needs_recovery = 0; 39660390131bSFrank Mayhar goto no_journal; 3967ac27a0ecSDave Kleikamp } 3968ac27a0ecSDave Kleikamp 3969f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3970eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3971eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3972b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3973744692dcSJiaying Zhang goto failed_mount_wq; 3974eb40a09cSJose R. Santos } 3975eb40a09cSJose R. Santos 397625ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 397725ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 397825ed6e8aSDarrick J. Wong "feature set"); 397925ed6e8aSDarrick J. Wong goto failed_mount_wq; 3980d4da6c9cSLinus Torvalds } 3981818d276cSGirish Shilamkar 3982ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3983ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3984ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3985ac27a0ecSDave Kleikamp case 0: 3986ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 398763f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 398863f57933SAndrew Morton * cope, else JOURNAL_DATA 398963f57933SAndrew Morton */ 3990dab291afSMingming Cao if (jbd2_journal_check_available_features 3991dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3992fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3993ac27a0ecSDave Kleikamp else 3994fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3995ac27a0ecSDave Kleikamp break; 3996ac27a0ecSDave Kleikamp 3997617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3998617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3999dab291afSMingming Cao if (!jbd2_journal_check_available_features 4000dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4001b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4002b31e1552SEric Sandeen "requested data journaling mode"); 4003744692dcSJiaying Zhang goto failed_mount_wq; 4004ac27a0ecSDave Kleikamp } 4005ac27a0ecSDave Kleikamp default: 4006ac27a0ecSDave Kleikamp break; 4007ac27a0ecSDave Kleikamp } 4008b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4009ac27a0ecSDave Kleikamp 401018aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 401118aadd47SBobi Jam 4012ce7e010aSTheodore Ts'o no_journal: 40139c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 40149c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 40159c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40169c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40179c191f70ST Makphaibulchoke goto failed_mount_wq; 40189c191f70ST Makphaibulchoke } 40199c191f70ST Makphaibulchoke } 40209c191f70ST Makphaibulchoke 4021fd89d5f2STejun Heo /* 4022952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4023952fc18eSTheodore Ts'o * superblock if present. 4024952fc18eSTheodore Ts'o */ 4025952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4026952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4027952fc18eSTheodore Ts'o else { 402807aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 402907aa2ea1SLukas Czerner if (err) 4030952fc18eSTheodore Ts'o goto failed_mount_wq; 4031952fc18eSTheodore Ts'o } 4032952fc18eSTheodore Ts'o 4033952fc18eSTheodore Ts'o /* 4034fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4035fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4036fd89d5f2STejun Heo */ 40372e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40382e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40392e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40402e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 404107aa2ea1SLukas Czerner ret = -ENOMEM; 40422e8fa54eSJan Kara goto failed_mount4; 40432e8fa54eSJan Kara } 40442e8fa54eSJan Kara 4045ac27a0ecSDave Kleikamp /* 4046dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4047ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4048ac27a0ecSDave Kleikamp */ 4049ac27a0ecSDave Kleikamp 40501d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 40511d1fe1eeSDavid Howells if (IS_ERR(root)) { 4052b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 40531d1fe1eeSDavid Howells ret = PTR_ERR(root); 405432a9bb57SManish Katiyar root = NULL; 4055ac27a0ecSDave Kleikamp goto failed_mount4; 4056ac27a0ecSDave Kleikamp } 4057ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4058b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 405994bf608aSAl Viro iput(root); 4060ac27a0ecSDave Kleikamp goto failed_mount4; 4061ac27a0ecSDave Kleikamp } 406248fde701SAl Viro sb->s_root = d_make_root(root); 40631d1fe1eeSDavid Howells if (!sb->s_root) { 4064b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 40651d1fe1eeSDavid Howells ret = -ENOMEM; 40661d1fe1eeSDavid Howells goto failed_mount4; 40671d1fe1eeSDavid Howells } 4068ac27a0ecSDave Kleikamp 40697e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 40707e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4071ef7f3835SKalpak Shah 4072ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4073ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 4074ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4075ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4076ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 4077ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 4078ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4079ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4080ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4081ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4082ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4083ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4084ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4085ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4086ef7f3835SKalpak Shah } 4087ef7f3835SKalpak Shah } 4088ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4089ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4090ef7f3835SKalpak Shah sbi->s_inode_size) { 4091ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4092ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4093b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4094b31e1552SEric Sandeen "available"); 4095ef7f3835SKalpak Shah } 4096ef7f3835SKalpak Shah 409730fac0f7SJan Kara err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); 409827dd4385SLukas Czerner if (err) { 409927dd4385SLukas Czerner ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " 410030fac0f7SJan Kara "reserved pool", ext4_calculate_resv_clusters(sb)); 4101f9ae9cf5STheodore Ts'o goto failed_mount4a; 410227dd4385SLukas Czerner } 410327dd4385SLukas Czerner 41046fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 41056fd058f7STheodore Ts'o if (err) { 4106b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4107fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4108f9ae9cf5STheodore Ts'o goto failed_mount4a; 4109f9ae9cf5STheodore Ts'o } 4110f9ae9cf5STheodore Ts'o 4111f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4112f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4113f9ae9cf5STheodore Ts'o if (err) { 4114f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4115f9ae9cf5STheodore Ts'o err); 4116dcf2d804STao Ma goto failed_mount5; 4117c2774d84SAneesh Kumar K.V } 4118c2774d84SAneesh Kumar K.V 4119d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4120d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4121d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4122d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, block); 4123d5e03cbbSTheodore Ts'o if (!err) { 4124d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4125d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4126d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, freei); 4127d5e03cbbSTheodore Ts'o } 4128d5e03cbbSTheodore Ts'o if (!err) 4129d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4130d5e03cbbSTheodore Ts'o ext4_count_dirs(sb)); 4131d5e03cbbSTheodore Ts'o if (!err) 4132d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 4133d5e03cbbSTheodore Ts'o if (err) { 4134d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4135d5e03cbbSTheodore Ts'o goto failed_mount6; 4136d5e03cbbSTheodore Ts'o } 4137d5e03cbbSTheodore Ts'o 4138d5e03cbbSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 4139d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4140d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4141d5e03cbbSTheodore Ts'o "unable to initialize " 4142d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4143d5e03cbbSTheodore Ts'o goto failed_mount6; 4144d5e03cbbSTheodore Ts'o } 4145d5e03cbbSTheodore Ts'o 4146bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4147bfff6873SLukas Czerner if (err) 4148dcf2d804STao Ma goto failed_mount6; 4149bfff6873SLukas Czerner 41503197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 41513197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 41523197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 41533197ebdbSTheodore Ts'o "%s", sb->s_id); 4154dcf2d804STao Ma if (err) 4155dcf2d804STao Ma goto failed_mount7; 41563197ebdbSTheodore Ts'o 41579b2ff357SJan Kara #ifdef CONFIG_QUOTA 41589b2ff357SJan Kara /* Enable quota usage during mount. */ 41599b2ff357SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 41609b2ff357SJan Kara !(sb->s_flags & MS_RDONLY)) { 41619b2ff357SJan Kara err = ext4_enable_quotas(sb); 41629b2ff357SJan Kara if (err) 41639b2ff357SJan Kara goto failed_mount8; 41649b2ff357SJan Kara } 41659b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 41669b2ff357SJan Kara 4167617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4168617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4169617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 41700390131bSFrank Mayhar if (needs_recovery) { 4171b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4172617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 41730390131bSFrank Mayhar } 41740390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 41750390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 41760390131bSFrank Mayhar descr = " journalled data mode"; 41770390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 41780390131bSFrank Mayhar descr = " ordered data mode"; 41790390131bSFrank Mayhar else 41800390131bSFrank Mayhar descr = " writeback data mode"; 41810390131bSFrank Mayhar } else 41820390131bSFrank Mayhar descr = "out journal"; 41830390131bSFrank Mayhar 418479add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 418579add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 418679add3a3SLukas Czerner if (!blk_queue_discard(q)) 418779add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 418879add3a3SLukas Czerner "mounting with \"discard\" option, but " 418979add3a3SLukas Czerner "the device does not support discard"); 419079add3a3SLukas Czerner } 419179add3a3SLukas Czerner 4192d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 41938b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 41948b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4195ac27a0ecSDave Kleikamp 419666e61a9eSTheodore Ts'o if (es->s_error_count) 419766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4198ac27a0ecSDave Kleikamp 4199efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4200efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4201efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4202efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4203efbed4dcSTheodore Ts'o 4204d4c402d9SCurt Wohlgemuth kfree(orig_data); 4205ac27a0ecSDave Kleikamp return 0; 4206ac27a0ecSDave Kleikamp 4207617ba13bSMingming Cao cantfind_ext4: 4208ac27a0ecSDave Kleikamp if (!silent) 4209b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4210ac27a0ecSDave Kleikamp goto failed_mount; 4211ac27a0ecSDave Kleikamp 421272ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 421372ba7450STheodore Ts'o failed_mount8: 421472ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 421572ba7450STheodore Ts'o #endif 4216dcf2d804STao Ma failed_mount7: 4217dcf2d804STao Ma ext4_unregister_li_request(sb); 4218dcf2d804STao Ma failed_mount6: 4219f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4220d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4221d5e03cbbSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 4222d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4223d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4224d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4225d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 422600764937SAzat Khuzhin failed_mount5: 4227f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4228f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4229f9ae9cf5STheodore Ts'o failed_mount4a: 423094bf608aSAl Viro dput(sb->s_root); 423132a9bb57SManish Katiyar sb->s_root = NULL; 423294bf608aSAl Viro failed_mount4: 4233b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 42342e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 42352e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 42364c0425ffSMingming Cao failed_mount_wq: 42370390131bSFrank Mayhar if (sbi->s_journal) { 4238dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 423947b4a50bSJan Kara sbi->s_journal = NULL; 42400390131bSFrank Mayhar } 4241d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4242eb68d0e2SZheng Liu failed_mount3: 42439105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4244c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4245c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4246ac27a0ecSDave Kleikamp failed_mount2: 4247ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4248ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4249f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4250ac27a0ecSDave Kleikamp failed_mount: 42510441984aSDarrick J. Wong if (sbi->s_chksum_driver) 42520441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4253240799cdSTheodore Ts'o if (sbi->s_proc) { 425466acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 42559f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4256240799cdSTheodore Ts'o } 4257ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4258a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4259ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4260ac27a0ecSDave Kleikamp #endif 4261617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4262ac27a0ecSDave Kleikamp brelse(bh); 4263ac27a0ecSDave Kleikamp out_fail: 4264ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4265f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4266ac27a0ecSDave Kleikamp kfree(sbi); 4267dcc7dae3SCyrill Gorcunov out_free_orig: 4268d4c402d9SCurt Wohlgemuth kfree(orig_data); 426907aa2ea1SLukas Czerner return err ? err : ret; 4270ac27a0ecSDave Kleikamp } 4271ac27a0ecSDave Kleikamp 4272ac27a0ecSDave Kleikamp /* 4273ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4274ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4275ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4276ac27a0ecSDave Kleikamp */ 4277617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4278ac27a0ecSDave Kleikamp { 4279617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4280ac27a0ecSDave Kleikamp 4281ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 428230773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 428330773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4284ac27a0ecSDave Kleikamp 4285a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4286ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4287dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4288ac27a0ecSDave Kleikamp else 4289dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 42905bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 42915bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 42925bf5683aSHidehiro Kawai else 42935bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4294a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4295ac27a0ecSDave Kleikamp } 4296ac27a0ecSDave Kleikamp 4297617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4298ac27a0ecSDave Kleikamp unsigned int journal_inum) 4299ac27a0ecSDave Kleikamp { 4300ac27a0ecSDave Kleikamp struct inode *journal_inode; 4301ac27a0ecSDave Kleikamp journal_t *journal; 4302ac27a0ecSDave Kleikamp 43030390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43040390131bSFrank Mayhar 4305ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4306ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4307ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4308ac27a0ecSDave Kleikamp 43091d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43101d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4311b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4312ac27a0ecSDave Kleikamp return NULL; 4313ac27a0ecSDave Kleikamp } 4314ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4315ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4316ac27a0ecSDave Kleikamp iput(journal_inode); 4317b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4318ac27a0ecSDave Kleikamp return NULL; 4319ac27a0ecSDave Kleikamp } 4320ac27a0ecSDave Kleikamp 4321e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4322ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 43231d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4324b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4325ac27a0ecSDave Kleikamp iput(journal_inode); 4326ac27a0ecSDave Kleikamp return NULL; 4327ac27a0ecSDave Kleikamp } 4328ac27a0ecSDave Kleikamp 4329dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4330ac27a0ecSDave Kleikamp if (!journal) { 4331b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4332ac27a0ecSDave Kleikamp iput(journal_inode); 4333ac27a0ecSDave Kleikamp return NULL; 4334ac27a0ecSDave Kleikamp } 4335ac27a0ecSDave Kleikamp journal->j_private = sb; 4336617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4337ac27a0ecSDave Kleikamp return journal; 4338ac27a0ecSDave Kleikamp } 4339ac27a0ecSDave Kleikamp 4340617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4341ac27a0ecSDave Kleikamp dev_t j_dev) 4342ac27a0ecSDave Kleikamp { 4343ac27a0ecSDave Kleikamp struct buffer_head *bh; 4344ac27a0ecSDave Kleikamp journal_t *journal; 4345617ba13bSMingming Cao ext4_fsblk_t start; 4346617ba13bSMingming Cao ext4_fsblk_t len; 4347ac27a0ecSDave Kleikamp int hblock, blocksize; 4348617ba13bSMingming Cao ext4_fsblk_t sb_block; 4349ac27a0ecSDave Kleikamp unsigned long offset; 4350617ba13bSMingming Cao struct ext4_super_block *es; 4351ac27a0ecSDave Kleikamp struct block_device *bdev; 4352ac27a0ecSDave Kleikamp 43530390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43540390131bSFrank Mayhar 4355b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4356ac27a0ecSDave Kleikamp if (bdev == NULL) 4357ac27a0ecSDave Kleikamp return NULL; 4358ac27a0ecSDave Kleikamp 4359ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4360e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4361ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4362b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4363b31e1552SEric Sandeen "blocksize too small for journal device"); 4364ac27a0ecSDave Kleikamp goto out_bdev; 4365ac27a0ecSDave Kleikamp } 4366ac27a0ecSDave Kleikamp 4367617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4368617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4369ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4370ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4371b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4372b31e1552SEric Sandeen "external journal"); 4373ac27a0ecSDave Kleikamp goto out_bdev; 4374ac27a0ecSDave Kleikamp } 4375ac27a0ecSDave Kleikamp 43762716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4377617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4378ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4379617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4380b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4381b31e1552SEric Sandeen "bad superblock"); 4382ac27a0ecSDave Kleikamp brelse(bh); 4383ac27a0ecSDave Kleikamp goto out_bdev; 4384ac27a0ecSDave Kleikamp } 4385ac27a0ecSDave Kleikamp 4386df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4387df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4388df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4389df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4390df4763beSDarrick J. Wong "corrupt superblock"); 4391df4763beSDarrick J. Wong brelse(bh); 4392df4763beSDarrick J. Wong goto out_bdev; 4393df4763beSDarrick J. Wong } 4394df4763beSDarrick J. Wong 4395617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4396b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4397ac27a0ecSDave Kleikamp brelse(bh); 4398ac27a0ecSDave Kleikamp goto out_bdev; 4399ac27a0ecSDave Kleikamp } 4400ac27a0ecSDave Kleikamp 4401bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4402ac27a0ecSDave Kleikamp start = sb_block + 1; 4403ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4404ac27a0ecSDave Kleikamp 4405dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4406ac27a0ecSDave Kleikamp start, len, blocksize); 4407ac27a0ecSDave Kleikamp if (!journal) { 4408b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4409ac27a0ecSDave Kleikamp goto out_bdev; 4410ac27a0ecSDave Kleikamp } 4411ac27a0ecSDave Kleikamp journal->j_private = sb; 44129f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4413ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4414ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4415b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4416ac27a0ecSDave Kleikamp goto out_journal; 4417ac27a0ecSDave Kleikamp } 4418ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4419b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4420b31e1552SEric Sandeen "user (unsupported) - %d", 4421ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4422ac27a0ecSDave Kleikamp goto out_journal; 4423ac27a0ecSDave Kleikamp } 4424617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4425617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4426ac27a0ecSDave Kleikamp return journal; 44270b8e58a1SAndreas Dilger 4428ac27a0ecSDave Kleikamp out_journal: 4429dab291afSMingming Cao jbd2_journal_destroy(journal); 4430ac27a0ecSDave Kleikamp out_bdev: 4431617ba13bSMingming Cao ext4_blkdev_put(bdev); 4432ac27a0ecSDave Kleikamp return NULL; 4433ac27a0ecSDave Kleikamp } 4434ac27a0ecSDave Kleikamp 4435617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4436617ba13bSMingming Cao struct ext4_super_block *es, 4437ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4438ac27a0ecSDave Kleikamp { 4439ac27a0ecSDave Kleikamp journal_t *journal; 4440ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4441ac27a0ecSDave Kleikamp dev_t journal_dev; 4442ac27a0ecSDave Kleikamp int err = 0; 4443ac27a0ecSDave Kleikamp int really_read_only; 4444ac27a0ecSDave Kleikamp 44450390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44460390131bSFrank Mayhar 4447ac27a0ecSDave Kleikamp if (journal_devnum && 4448ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4449b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4450b31e1552SEric Sandeen "numbers have changed"); 4451ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4452ac27a0ecSDave Kleikamp } else 4453ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4454ac27a0ecSDave Kleikamp 4455ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4456ac27a0ecSDave Kleikamp 4457ac27a0ecSDave Kleikamp /* 4458ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4459ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4460ac27a0ecSDave Kleikamp * can get read-write access to the device. 4461ac27a0ecSDave Kleikamp */ 4462617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4463ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4464b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4465b31e1552SEric Sandeen "required on readonly filesystem"); 4466ac27a0ecSDave Kleikamp if (really_read_only) { 4467b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4468b31e1552SEric Sandeen "unavailable, cannot proceed"); 4469ac27a0ecSDave Kleikamp return -EROFS; 4470ac27a0ecSDave Kleikamp } 4471b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4472b31e1552SEric Sandeen "be enabled during recovery"); 4473ac27a0ecSDave Kleikamp } 4474ac27a0ecSDave Kleikamp } 4475ac27a0ecSDave Kleikamp 4476ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4477b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4478b31e1552SEric Sandeen "and inode journals!"); 4479ac27a0ecSDave Kleikamp return -EINVAL; 4480ac27a0ecSDave Kleikamp } 4481ac27a0ecSDave Kleikamp 4482ac27a0ecSDave Kleikamp if (journal_inum) { 4483617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4484ac27a0ecSDave Kleikamp return -EINVAL; 4485ac27a0ecSDave Kleikamp } else { 4486617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4487ac27a0ecSDave Kleikamp return -EINVAL; 4488ac27a0ecSDave Kleikamp } 4489ac27a0ecSDave Kleikamp 449090576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4491b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 44924776004fSTheodore Ts'o 4493617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4494dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 44951c13d5c0STheodore Ts'o if (!err) { 44961c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 44971c13d5c0STheodore Ts'o if (save) 44981c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 44991c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4500dab291afSMingming Cao err = jbd2_journal_load(journal); 45011c13d5c0STheodore Ts'o if (save) 45021c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 45031c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 45041c13d5c0STheodore Ts'o kfree(save); 45051c13d5c0STheodore Ts'o } 4506ac27a0ecSDave Kleikamp 4507ac27a0ecSDave Kleikamp if (err) { 4508b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4509dab291afSMingming Cao jbd2_journal_destroy(journal); 4510ac27a0ecSDave Kleikamp return err; 4511ac27a0ecSDave Kleikamp } 4512ac27a0ecSDave Kleikamp 4513617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4514617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4515ac27a0ecSDave Kleikamp 4516c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4517ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4518ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4519ac27a0ecSDave Kleikamp 4520ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4521e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4522ac27a0ecSDave Kleikamp } 4523ac27a0ecSDave Kleikamp 4524ac27a0ecSDave Kleikamp return 0; 4525ac27a0ecSDave Kleikamp } 4526ac27a0ecSDave Kleikamp 4527e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4528ac27a0ecSDave Kleikamp { 4529e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4530617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4531c4be0c1dSTakashi Sato int error = 0; 4532ac27a0ecSDave Kleikamp 45337c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4534c4be0c1dSTakashi Sato return error; 4535914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4536914258bfSTheodore Ts'o /* 4537914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4538914258bfSTheodore Ts'o * superblock failed. This could happen because the 4539914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4540914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4541914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4542914258bfSTheodore Ts'o * write and hope for the best. 4543914258bfSTheodore Ts'o */ 4544b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4545b31e1552SEric Sandeen "superblock detected"); 4546914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4547914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4548914258bfSTheodore Ts'o } 454971290b36STheodore Ts'o /* 455071290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 455171290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 455271290b36STheodore Ts'o * write time when we are mounting the root file system 455371290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 455471290b36STheodore Ts'o * for people who are east of GMT and who make their clock 455571290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 455671290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 455771290b36STheodore Ts'o * to complain and force a full file system check. 455871290b36STheodore Ts'o */ 455971290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4560ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4561f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4562afc32f7eSTheodore Ts'o es->s_kbytes_written = 4563afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4564afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4565afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4566f613dfcbSTheodore Ts'o else 4567f613dfcbSTheodore Ts'o es->s_kbytes_written = 4568f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4569d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 457057042651STheodore Ts'o ext4_free_blocks_count_set(es, 457157042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 457257042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4573d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 45747f93cff9STheodore Ts'o es->s_free_inodes_count = 45757f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 45765d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4577ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 457806db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4579ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4580914258bfSTheodore Ts'o if (sync) { 4581c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4582c4be0c1dSTakashi Sato if (error) 4583c4be0c1dSTakashi Sato return error; 4584c4be0c1dSTakashi Sato 4585c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4586c4be0c1dSTakashi Sato if (error) { 4587b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4588b31e1552SEric Sandeen "superblock"); 4589914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4590914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4591914258bfSTheodore Ts'o } 4592914258bfSTheodore Ts'o } 4593c4be0c1dSTakashi Sato return error; 4594ac27a0ecSDave Kleikamp } 4595ac27a0ecSDave Kleikamp 4596ac27a0ecSDave Kleikamp /* 4597ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4598ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4599ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4600ac27a0ecSDave Kleikamp */ 4601617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4602617ba13bSMingming Cao struct ext4_super_block *es) 4603ac27a0ecSDave Kleikamp { 4604617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4605ac27a0ecSDave Kleikamp 46060390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 46070390131bSFrank Mayhar BUG_ON(journal != NULL); 46080390131bSFrank Mayhar return; 46090390131bSFrank Mayhar } 4610dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46117ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 46127ffe1ea8SHidehiro Kawai goto out; 46137ffe1ea8SHidehiro Kawai 4614617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4615ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4616617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4617e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4618ac27a0ecSDave Kleikamp } 46197ffe1ea8SHidehiro Kawai 46207ffe1ea8SHidehiro Kawai out: 4621dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4622ac27a0ecSDave Kleikamp } 4623ac27a0ecSDave Kleikamp 4624ac27a0ecSDave Kleikamp /* 4625ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4626ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4627ac27a0ecSDave Kleikamp * main filesystem now. 4628ac27a0ecSDave Kleikamp */ 4629617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4630617ba13bSMingming Cao struct ext4_super_block *es) 4631ac27a0ecSDave Kleikamp { 4632ac27a0ecSDave Kleikamp journal_t *journal; 4633ac27a0ecSDave Kleikamp int j_errno; 4634ac27a0ecSDave Kleikamp const char *errstr; 4635ac27a0ecSDave Kleikamp 46360390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 46370390131bSFrank Mayhar 4638617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4639ac27a0ecSDave Kleikamp 4640ac27a0ecSDave Kleikamp /* 4641ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4642617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4643ac27a0ecSDave Kleikamp */ 4644ac27a0ecSDave Kleikamp 4645dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4646ac27a0ecSDave Kleikamp if (j_errno) { 4647ac27a0ecSDave Kleikamp char nbuf[16]; 4648ac27a0ecSDave Kleikamp 4649617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 465012062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4651ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 465212062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4653ac27a0ecSDave Kleikamp 4654617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4655617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4656e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4657ac27a0ecSDave Kleikamp 4658dab291afSMingming Cao jbd2_journal_clear_err(journal); 4659d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4660ac27a0ecSDave Kleikamp } 4661ac27a0ecSDave Kleikamp } 4662ac27a0ecSDave Kleikamp 4663ac27a0ecSDave Kleikamp /* 4664ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4665ac27a0ecSDave Kleikamp * and wait on the commit. 4666ac27a0ecSDave Kleikamp */ 4667617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4668ac27a0ecSDave Kleikamp { 4669ac27a0ecSDave Kleikamp journal_t *journal; 4670ac27a0ecSDave Kleikamp 4671ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4672ac27a0ecSDave Kleikamp return 0; 4673ac27a0ecSDave Kleikamp 4674617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4675b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4676ac27a0ecSDave Kleikamp } 4677ac27a0ecSDave Kleikamp 4678617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4679ac27a0ecSDave Kleikamp { 468014ce0cb4STheodore Ts'o int ret = 0; 46819eddacf9SJan Kara tid_t target; 468206a407f1SDmitry Monakhov bool needs_barrier = false; 46838d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4684ac27a0ecSDave Kleikamp 46859bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 46862e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4687a1177825SJan Kara /* 4688a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4689a1177825SJan Kara * no dirty dquots 4690a1177825SJan Kara */ 4691a1177825SJan Kara dquot_writeback_dquots(sb, -1); 469206a407f1SDmitry Monakhov /* 469306a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 469406a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 469506a407f1SDmitry Monakhov * transaction_commit will do it for us. 469606a407f1SDmitry Monakhov */ 4697bda32530STheodore Ts'o if (sbi->s_journal) { 469806a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 469906a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 470006a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 470106a407f1SDmitry Monakhov needs_barrier = true; 470206a407f1SDmitry Monakhov 47038d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4704ac27a0ecSDave Kleikamp if (wait) 4705bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4706bda32530STheodore Ts'o target); 47070390131bSFrank Mayhar } 4708bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4709bda32530STheodore Ts'o needs_barrier = true; 471006a407f1SDmitry Monakhov if (needs_barrier) { 471106a407f1SDmitry Monakhov int err; 471206a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 471306a407f1SDmitry Monakhov if (!ret) 471406a407f1SDmitry Monakhov ret = err; 471506a407f1SDmitry Monakhov } 471606a407f1SDmitry Monakhov 471706a407f1SDmitry Monakhov return ret; 471806a407f1SDmitry Monakhov } 471906a407f1SDmitry Monakhov 4720ac27a0ecSDave Kleikamp /* 4721ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4722ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4723be4f27d3SYongqiang Yang * 4724be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 47258e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 47268e8ad8a5SJan Kara * modifications. 4727ac27a0ecSDave Kleikamp */ 4728c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4729ac27a0ecSDave Kleikamp { 4730c4be0c1dSTakashi Sato int error = 0; 4731c4be0c1dSTakashi Sato journal_t *journal; 4732ac27a0ecSDave Kleikamp 47339ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47349ca92389STheodore Ts'o return 0; 47359ca92389STheodore Ts'o 4736c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4737ac27a0ecSDave Kleikamp 4738bb044576STheodore Ts'o if (journal) { 4739ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4740dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47417ffe1ea8SHidehiro Kawai 47427ffe1ea8SHidehiro Kawai /* 4743bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4744bb044576STheodore Ts'o * flush the journal. 47457ffe1ea8SHidehiro Kawai */ 4746c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 47476b0310fbSEric Sandeen if (error < 0) 47486b0310fbSEric Sandeen goto out; 4749bb044576STheodore Ts'o } 4750ac27a0ecSDave Kleikamp 4751ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4752617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4753e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 47546b0310fbSEric Sandeen out: 4755bb044576STheodore Ts'o if (journal) 47568e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4757bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 47586b0310fbSEric Sandeen return error; 4759ac27a0ecSDave Kleikamp } 4760ac27a0ecSDave Kleikamp 4761ac27a0ecSDave Kleikamp /* 4762ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4763ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4764ac27a0ecSDave Kleikamp */ 4765c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4766ac27a0ecSDave Kleikamp { 47679ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47689ca92389STheodore Ts'o return 0; 47699ca92389STheodore Ts'o 47709ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4771617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4772e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4773c4be0c1dSTakashi Sato return 0; 4774ac27a0ecSDave Kleikamp } 4775ac27a0ecSDave Kleikamp 4776673c6100STheodore Ts'o /* 4777673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4778673c6100STheodore Ts'o */ 4779673c6100STheodore Ts'o struct ext4_mount_options { 4780673c6100STheodore Ts'o unsigned long s_mount_opt; 4781a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 478208cefc7aSEric W. Biederman kuid_t s_resuid; 478308cefc7aSEric W. Biederman kgid_t s_resgid; 4784673c6100STheodore Ts'o unsigned long s_commit_interval; 4785673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4786673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4787673c6100STheodore Ts'o int s_jquota_fmt; 4788a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4789673c6100STheodore Ts'o #endif 4790673c6100STheodore Ts'o }; 4791673c6100STheodore Ts'o 4792617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4793ac27a0ecSDave Kleikamp { 4794617ba13bSMingming Cao struct ext4_super_block *es; 4795617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4796ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4797617ba13bSMingming Cao struct ext4_mount_options old_opts; 4798c79d967dSChristoph Hellwig int enable_quota = 0; 47998a266467STheodore Ts'o ext4_group_t g; 4800b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4801c5e06d10SJohann Lombardi int err = 0; 4802ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 480303dafb5fSChen Gang int i, j; 4804ac27a0ecSDave Kleikamp #endif 4805d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4806ac27a0ecSDave Kleikamp 4807ac27a0ecSDave Kleikamp /* Store the original options */ 4808ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4809ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4810a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4811ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4812ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4813ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 481430773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 481530773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4816ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4817ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4818a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 481903dafb5fSChen Gang if (sbi->s_qf_names[i]) { 482003dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 482103dafb5fSChen Gang GFP_KERNEL); 482203dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 482303dafb5fSChen Gang for (j = 0; j < i; j++) 482403dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 48253e36a163SWei Yongjun kfree(orig_data); 482603dafb5fSChen Gang return -ENOMEM; 482703dafb5fSChen Gang } 482803dafb5fSChen Gang } else 482903dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4830ac27a0ecSDave Kleikamp #endif 4831b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4832b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4833ac27a0ecSDave Kleikamp 4834ac27a0ecSDave Kleikamp /* 4835ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4836ac27a0ecSDave Kleikamp */ 4837661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4838ac27a0ecSDave Kleikamp err = -EINVAL; 4839ac27a0ecSDave Kleikamp goto restore_opts; 4840ac27a0ecSDave Kleikamp } 4841ac27a0ecSDave Kleikamp 48426ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 48436ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 48446ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48456ae6514bSPiotr Sarna "both data=journal and delalloc"); 48466ae6514bSPiotr Sarna err = -EINVAL; 48476ae6514bSPiotr Sarna goto restore_opts; 48486ae6514bSPiotr Sarna } 48496ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 48506ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48516ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 48526ae6514bSPiotr Sarna err = -EINVAL; 48536ae6514bSPiotr Sarna goto restore_opts; 48546ae6514bSPiotr Sarna } 48556ae6514bSPiotr Sarna } 48566ae6514bSPiotr Sarna 48574ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4858c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4859ac27a0ecSDave Kleikamp 4860ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4861482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4862ac27a0ecSDave Kleikamp 4863ac27a0ecSDave Kleikamp es = sbi->s_es; 4864ac27a0ecSDave Kleikamp 4865b3881f74STheodore Ts'o if (sbi->s_journal) { 4866617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4867b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4868b3881f74STheodore Ts'o } 4869ac27a0ecSDave Kleikamp 4870661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 48714ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4872ac27a0ecSDave Kleikamp err = -EROFS; 4873ac27a0ecSDave Kleikamp goto restore_opts; 4874ac27a0ecSDave Kleikamp } 4875ac27a0ecSDave Kleikamp 4876ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 487738c03b34STheodore Ts'o err = sync_filesystem(sb); 487838c03b34STheodore Ts'o if (err < 0) 487938c03b34STheodore Ts'o goto restore_opts; 48800f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 48810f0dd62fSChristoph Hellwig if (err < 0) 4882c79d967dSChristoph Hellwig goto restore_opts; 4883c79d967dSChristoph Hellwig 4884ac27a0ecSDave Kleikamp /* 4885ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4886ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4887ac27a0ecSDave Kleikamp */ 4888ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4889ac27a0ecSDave Kleikamp 4890ac27a0ecSDave Kleikamp /* 4891ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4892ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4893ac27a0ecSDave Kleikamp * mark the partition as valid again. 4894ac27a0ecSDave Kleikamp */ 4895617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4896617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4897ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4898ac27a0ecSDave Kleikamp 4899a63c9eb2STheodore Ts'o if (sbi->s_journal) 4900617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4901ac27a0ecSDave Kleikamp } else { 4902a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4903a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4904ac27a0ecSDave Kleikamp err = -EROFS; 4905ac27a0ecSDave Kleikamp goto restore_opts; 4906ac27a0ecSDave Kleikamp } 4907ead6596bSEric Sandeen /* 49088a266467STheodore Ts'o * Make sure the group descriptor checksums 49090b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 49108a266467STheodore Ts'o */ 49118a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 49128a266467STheodore Ts'o struct ext4_group_desc *gdp = 49138a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 49148a266467STheodore Ts'o 4915feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4916b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4917b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 49188a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 49198a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 49208a266467STheodore Ts'o err = -EINVAL; 49218a266467STheodore Ts'o goto restore_opts; 49228a266467STheodore Ts'o } 49238a266467STheodore Ts'o } 49248a266467STheodore Ts'o 49258a266467STheodore Ts'o /* 4926ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4927ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4928ead6596bSEric Sandeen * require a full umount/remount for now. 4929ead6596bSEric Sandeen */ 4930ead6596bSEric Sandeen if (es->s_last_orphan) { 4931b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4932ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4933ead6596bSEric Sandeen "orphan inode list. Please " 4934b31e1552SEric Sandeen "umount/remount instead"); 4935ead6596bSEric Sandeen err = -EINVAL; 4936ead6596bSEric Sandeen goto restore_opts; 4937ead6596bSEric Sandeen } 4938ead6596bSEric Sandeen 4939ac27a0ecSDave Kleikamp /* 4940ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4941ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4942ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4943ac27a0ecSDave Kleikamp * the partition.) 4944ac27a0ecSDave Kleikamp */ 49450390131bSFrank Mayhar if (sbi->s_journal) 4946617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4947ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4948617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4949ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4950c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4951c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4952c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4953c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4954c5e06d10SJohann Lombardi err = -EROFS; 4955c5e06d10SJohann Lombardi goto restore_opts; 4956c5e06d10SJohann Lombardi } 4957c79d967dSChristoph Hellwig enable_quota = 1; 4958ac27a0ecSDave Kleikamp } 4959ac27a0ecSDave Kleikamp } 4960bfff6873SLukas Czerner 4961bfff6873SLukas Czerner /* 4962bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4963bfff6873SLukas Czerner * current settings 4964bfff6873SLukas Czerner */ 4965bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4966bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4967bfff6873SLukas Czerner else { 4968bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4969bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4970bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4971bfff6873SLukas Czerner } 4972bfff6873SLukas Czerner 49736fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4974d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 4975e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 49760390131bSFrank Mayhar 4977ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4978ac27a0ecSDave Kleikamp /* Release old quota file names */ 4979a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4980ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 49817c319d32SAditya Kali if (enable_quota) { 49827c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 49830f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 49847c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 49857c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 49867c319d32SAditya Kali err = ext4_enable_quotas(sb); 498707724f98STheodore Ts'o if (err) 49887c319d32SAditya Kali goto restore_opts; 49897c319d32SAditya Kali } 49907c319d32SAditya Kali } 49917c319d32SAditya Kali #endif 4992d4c402d9SCurt Wohlgemuth 4993d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4994d4c402d9SCurt Wohlgemuth kfree(orig_data); 4995ac27a0ecSDave Kleikamp return 0; 49960b8e58a1SAndreas Dilger 4997ac27a0ecSDave Kleikamp restore_opts: 4998ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4999ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5000a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5001ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5002ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5003ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 500430773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 500530773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5006ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5007ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5008a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5009ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5010ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5011ac27a0ecSDave Kleikamp } 5012ac27a0ecSDave Kleikamp #endif 5013d4c402d9SCurt Wohlgemuth kfree(orig_data); 5014ac27a0ecSDave Kleikamp return err; 5015ac27a0ecSDave Kleikamp } 5016ac27a0ecSDave Kleikamp 5017617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5018ac27a0ecSDave Kleikamp { 5019ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5020617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5021617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 502227dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5023960cc398SPekka Enberg u64 fsid; 5024d02a9391SKazuya Mio s64 bfree; 502527dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5026ac27a0ecSDave Kleikamp 5027952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5028952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5029ac27a0ecSDave Kleikamp 5030617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5031ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5032b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 503357042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 503457042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5035d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 503657042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 503727dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 503827dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 503927dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5040ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5041ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 504252d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5043617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5044960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5045960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5046960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5047960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 50480b8e58a1SAndreas Dilger 5049ac27a0ecSDave Kleikamp return 0; 5050ac27a0ecSDave Kleikamp } 5051ac27a0ecSDave Kleikamp 50520b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 50530b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5054ac27a0ecSDave Kleikamp * Process 1 Process 2 5055617ba13bSMingming Cao * ext4_create() quota_sync() 5056dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5057871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5058dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5059ac27a0ecSDave Kleikamp * 5060ac27a0ecSDave Kleikamp */ 5061ac27a0ecSDave Kleikamp 5062ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5063ac27a0ecSDave Kleikamp 5064ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5065ac27a0ecSDave Kleikamp { 50664c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5067ac27a0ecSDave Kleikamp } 5068ac27a0ecSDave Kleikamp 5069617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5070ac27a0ecSDave Kleikamp { 5071ac27a0ecSDave Kleikamp int ret, err; 5072ac27a0ecSDave Kleikamp handle_t *handle; 5073ac27a0ecSDave Kleikamp struct inode *inode; 5074ac27a0ecSDave Kleikamp 5075ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 50769924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5077617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5078ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5079ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5080ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5081617ba13bSMingming Cao err = ext4_journal_stop(handle); 5082ac27a0ecSDave Kleikamp if (!ret) 5083ac27a0ecSDave Kleikamp ret = err; 5084ac27a0ecSDave Kleikamp return ret; 5085ac27a0ecSDave Kleikamp } 5086ac27a0ecSDave Kleikamp 5087617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5088ac27a0ecSDave Kleikamp { 5089ac27a0ecSDave Kleikamp int ret, err; 5090ac27a0ecSDave Kleikamp handle_t *handle; 5091ac27a0ecSDave Kleikamp 50929924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5093617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5094ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5095ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5096ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5097617ba13bSMingming Cao err = ext4_journal_stop(handle); 5098ac27a0ecSDave Kleikamp if (!ret) 5099ac27a0ecSDave Kleikamp ret = err; 5100ac27a0ecSDave Kleikamp return ret; 5101ac27a0ecSDave Kleikamp } 5102ac27a0ecSDave Kleikamp 5103617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5104ac27a0ecSDave Kleikamp { 5105ac27a0ecSDave Kleikamp int ret, err; 5106ac27a0ecSDave Kleikamp handle_t *handle; 5107ac27a0ecSDave Kleikamp 51089924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5109617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 51109c3013e9SJan Kara if (IS_ERR(handle)) { 51119c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 51129c3013e9SJan Kara dquot_release(dquot); 5113ac27a0ecSDave Kleikamp return PTR_ERR(handle); 51149c3013e9SJan Kara } 5115ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5116617ba13bSMingming Cao err = ext4_journal_stop(handle); 5117ac27a0ecSDave Kleikamp if (!ret) 5118ac27a0ecSDave Kleikamp ret = err; 5119ac27a0ecSDave Kleikamp return ret; 5120ac27a0ecSDave Kleikamp } 5121ac27a0ecSDave Kleikamp 5122617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5123ac27a0ecSDave Kleikamp { 5124262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5125262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5126262b4662SJan Kara 51272c8be6b2SJan Kara /* Are we journaling quotas? */ 5128262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 5129262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5130ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5131617ba13bSMingming Cao return ext4_write_dquot(dquot); 5132ac27a0ecSDave Kleikamp } else { 5133ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5134ac27a0ecSDave Kleikamp } 5135ac27a0ecSDave Kleikamp } 5136ac27a0ecSDave Kleikamp 5137617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5138ac27a0ecSDave Kleikamp { 5139ac27a0ecSDave Kleikamp int ret, err; 5140ac27a0ecSDave Kleikamp handle_t *handle; 5141ac27a0ecSDave Kleikamp 5142ac27a0ecSDave Kleikamp /* Data block + inode block */ 51439924a92aSTheodore Ts'o handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); 5144ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5145ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5146ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5147617ba13bSMingming Cao err = ext4_journal_stop(handle); 5148ac27a0ecSDave Kleikamp if (!ret) 5149ac27a0ecSDave Kleikamp ret = err; 5150ac27a0ecSDave Kleikamp return ret; 5151ac27a0ecSDave Kleikamp } 5152ac27a0ecSDave Kleikamp 5153ac27a0ecSDave Kleikamp /* 5154ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5155ac27a0ecSDave Kleikamp * the quota file and such... 5156ac27a0ecSDave Kleikamp */ 5157617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5158ac27a0ecSDave Kleikamp { 5159287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5160617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5161ac27a0ecSDave Kleikamp } 5162ac27a0ecSDave Kleikamp 5163ac27a0ecSDave Kleikamp /* 5164ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5165ac27a0ecSDave Kleikamp */ 5166617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5167f00c9e44SJan Kara struct path *path) 5168ac27a0ecSDave Kleikamp { 5169ac27a0ecSDave Kleikamp int err; 5170ac27a0ecSDave Kleikamp 5171ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5172ac27a0ecSDave Kleikamp return -EINVAL; 51730623543bSJan Kara 5174ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5175d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5176ac27a0ecSDave Kleikamp return -EXDEV; 51770623543bSJan Kara /* Journaling quota? */ 51780623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 51792b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5180f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5181b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5182b31e1552SEric Sandeen "Quota file not on filesystem root. " 5183b31e1552SEric Sandeen "Journaled quota will not work"); 51840623543bSJan Kara } 51850623543bSJan Kara 51860623543bSJan Kara /* 51870623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 51880623543bSJan Kara * all updates to the file when we bypass pagecache... 51890623543bSJan Kara */ 51900390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 5191f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 51920623543bSJan Kara /* 51930623543bSJan Kara * We don't need to lock updates but journal_flush() could 51940623543bSJan Kara * otherwise be livelocked... 51950623543bSJan Kara */ 51960623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 51977ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 51980623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5199f00c9e44SJan Kara if (err) 52007ffe1ea8SHidehiro Kawai return err; 52017ffe1ea8SHidehiro Kawai } 52020623543bSJan Kara 5203f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5204ac27a0ecSDave Kleikamp } 5205ac27a0ecSDave Kleikamp 52067c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 52077c319d32SAditya Kali unsigned int flags) 52087c319d32SAditya Kali { 52097c319d32SAditya Kali int err; 52107c319d32SAditya Kali struct inode *qf_inode; 5211a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52127c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52137c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52147c319d32SAditya Kali }; 52157c319d32SAditya Kali 52167c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 52177c319d32SAditya Kali 52187c319d32SAditya Kali if (!qf_inums[type]) 52197c319d32SAditya Kali return -EPERM; 52207c319d32SAditya Kali 52217c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 52227c319d32SAditya Kali if (IS_ERR(qf_inode)) { 52237c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 52247c319d32SAditya Kali return PTR_ERR(qf_inode); 52257c319d32SAditya Kali } 52267c319d32SAditya Kali 5227bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5228bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 52297c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 52307c319d32SAditya Kali iput(qf_inode); 52317c319d32SAditya Kali 52327c319d32SAditya Kali return err; 52337c319d32SAditya Kali } 52347c319d32SAditya Kali 52357c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 52367c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 52377c319d32SAditya Kali { 52387c319d32SAditya Kali int type, err = 0; 5239a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52407c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52417c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52427c319d32SAditya Kali }; 52437c319d32SAditya Kali 52447c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5245a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 52467c319d32SAditya Kali if (qf_inums[type]) { 52477c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 52487c319d32SAditya Kali DQUOT_USAGE_ENABLED); 52497c319d32SAditya Kali if (err) { 52507c319d32SAditya Kali ext4_warning(sb, 525172ba7450STheodore Ts'o "Failed to enable quota tracking " 525272ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 525372ba7450STheodore Ts'o "e2fsck to fix.", type, err); 52547c319d32SAditya Kali return err; 52557c319d32SAditya Kali } 52567c319d32SAditya Kali } 52577c319d32SAditya Kali } 52587c319d32SAditya Kali return 0; 52597c319d32SAditya Kali } 52607c319d32SAditya Kali 52617c319d32SAditya Kali /* 52627c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 52637c319d32SAditya Kali */ 52647c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 52657c319d32SAditya Kali int format_id) 52667c319d32SAditya Kali { 52677c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 52687c319d32SAditya Kali return -EINVAL; 52697c319d32SAditya Kali 52707c319d32SAditya Kali /* 52717c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 52727c319d32SAditya Kali */ 52737c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 52747c319d32SAditya Kali } 52757c319d32SAditya Kali 5276ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5277ca0e05e4SDmitry Monakhov { 527821f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 527921f97697SJan Kara handle_t *handle; 528021f97697SJan Kara 528187009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 528287009d86SDmitry Monakhov * Caller already holds s_umount sem */ 528387009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5284ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5285ca0e05e4SDmitry Monakhov 52860b268590SAmir Goldstein if (!inode) 52870b268590SAmir Goldstein goto out; 52880b268590SAmir Goldstein 528921f97697SJan Kara /* Update modification times of quota files when userspace can 529021f97697SJan Kara * start looking at them */ 52919924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 529221f97697SJan Kara if (IS_ERR(handle)) 529321f97697SJan Kara goto out; 529421f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 529521f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 529621f97697SJan Kara ext4_journal_stop(handle); 529721f97697SJan Kara 529821f97697SJan Kara out: 5299ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5300ca0e05e4SDmitry Monakhov } 5301ca0e05e4SDmitry Monakhov 53027c319d32SAditya Kali /* 53037c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 53047c319d32SAditya Kali */ 53057c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 53067c319d32SAditya Kali { 53077c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 53087c319d32SAditya Kali return -EINVAL; 53097c319d32SAditya Kali 53107c319d32SAditya Kali /* Disable only the limits. */ 53117c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 53127c319d32SAditya Kali } 53137c319d32SAditya Kali 5314ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5315ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5316ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5317ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5318617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5319ac27a0ecSDave Kleikamp size_t len, loff_t off) 5320ac27a0ecSDave Kleikamp { 5321ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5322725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5323ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5324ac27a0ecSDave Kleikamp int tocopy; 5325ac27a0ecSDave Kleikamp size_t toread; 5326ac27a0ecSDave Kleikamp struct buffer_head *bh; 5327ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5328ac27a0ecSDave Kleikamp 5329ac27a0ecSDave Kleikamp if (off > i_size) 5330ac27a0ecSDave Kleikamp return 0; 5331ac27a0ecSDave Kleikamp if (off+len > i_size) 5332ac27a0ecSDave Kleikamp len = i_size-off; 5333ac27a0ecSDave Kleikamp toread = len; 5334ac27a0ecSDave Kleikamp while (toread > 0) { 5335ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5336ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 53371c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 53381c215028STheodore Ts'o if (IS_ERR(bh)) 53391c215028STheodore Ts'o return PTR_ERR(bh); 5340ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5341ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5342ac27a0ecSDave Kleikamp else 5343ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5344ac27a0ecSDave Kleikamp brelse(bh); 5345ac27a0ecSDave Kleikamp offset = 0; 5346ac27a0ecSDave Kleikamp toread -= tocopy; 5347ac27a0ecSDave Kleikamp data += tocopy; 5348ac27a0ecSDave Kleikamp blk++; 5349ac27a0ecSDave Kleikamp } 5350ac27a0ecSDave Kleikamp return len; 5351ac27a0ecSDave Kleikamp } 5352ac27a0ecSDave Kleikamp 5353ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5354ac27a0ecSDave Kleikamp * enough credits) */ 5355617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5356ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5357ac27a0ecSDave Kleikamp { 5358ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5359725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 53601c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5361ac27a0ecSDave Kleikamp struct buffer_head *bh; 5362ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5363ac27a0ecSDave Kleikamp 53640390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5365b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5366b31e1552SEric Sandeen " cancelled because transaction is not started", 53679c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 53689c3013e9SJan Kara return -EIO; 53699c3013e9SJan Kara } 537067eeb568SDmitry Monakhov /* 537167eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 537267eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 537367eeb568SDmitry Monakhov */ 537467eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 537567eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 537667eeb568SDmitry Monakhov " cancelled because not block aligned", 537767eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 537867eeb568SDmitry Monakhov return -EIO; 537967eeb568SDmitry Monakhov } 538067eeb568SDmitry Monakhov 53811c215028STheodore Ts'o bh = ext4_bread(handle, inode, blk, 1); 53821c215028STheodore Ts'o if (IS_ERR(bh)) 53831c215028STheodore Ts'o return PTR_ERR(bh); 5384ac27a0ecSDave Kleikamp if (!bh) 5385ac27a0ecSDave Kleikamp goto out; 53865d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5387617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5388ac27a0ecSDave Kleikamp if (err) { 5389ac27a0ecSDave Kleikamp brelse(bh); 53901c215028STheodore Ts'o return err; 5391ac27a0ecSDave Kleikamp } 5392ac27a0ecSDave Kleikamp lock_buffer(bh); 539367eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5394ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5395ac27a0ecSDave Kleikamp unlock_buffer(bh); 53960390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5397ac27a0ecSDave Kleikamp brelse(bh); 5398ac27a0ecSDave Kleikamp out: 539967eeb568SDmitry Monakhov if (inode->i_size < off + len) { 540067eeb568SDmitry Monakhov i_size_write(inode, off + len); 5401617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5402617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 540321f97697SJan Kara } 540467eeb568SDmitry Monakhov return len; 5405ac27a0ecSDave Kleikamp } 5406ac27a0ecSDave Kleikamp 5407ac27a0ecSDave Kleikamp #endif 5408ac27a0ecSDave Kleikamp 5409152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5410152a0836SAl Viro const char *dev_name, void *data) 5411ac27a0ecSDave Kleikamp { 5412152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5413ac27a0ecSDave Kleikamp } 5414ac27a0ecSDave Kleikamp 541537f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 541624b58424STheodore Ts'o static inline void register_as_ext2(void) 541724b58424STheodore Ts'o { 541824b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 541924b58424STheodore Ts'o if (err) 542024b58424STheodore Ts'o printk(KERN_WARNING 542124b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 542224b58424STheodore Ts'o } 542324b58424STheodore Ts'o 542424b58424STheodore Ts'o static inline void unregister_as_ext2(void) 542524b58424STheodore Ts'o { 542624b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 542724b58424STheodore Ts'o } 54282035e776STheodore Ts'o 54292035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 54302035e776STheodore Ts'o { 54312035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 54322035e776STheodore Ts'o return 0; 54332035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54342035e776STheodore Ts'o return 1; 54352035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 54362035e776STheodore Ts'o return 0; 54372035e776STheodore Ts'o return 1; 54382035e776STheodore Ts'o } 543924b58424STheodore Ts'o #else 544024b58424STheodore Ts'o static inline void register_as_ext2(void) { } 544124b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 54422035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 544324b58424STheodore Ts'o #endif 544424b58424STheodore Ts'o 544537f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 544624b58424STheodore Ts'o static inline void register_as_ext3(void) 544724b58424STheodore Ts'o { 544824b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 544924b58424STheodore Ts'o if (err) 545024b58424STheodore Ts'o printk(KERN_WARNING 545124b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 545224b58424STheodore Ts'o } 545324b58424STheodore Ts'o 545424b58424STheodore Ts'o static inline void unregister_as_ext3(void) 545524b58424STheodore Ts'o { 545624b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 545724b58424STheodore Ts'o } 54582035e776STheodore Ts'o 54592035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 54602035e776STheodore Ts'o { 54612035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 54622035e776STheodore Ts'o return 0; 54632035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 54642035e776STheodore Ts'o return 0; 54652035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54662035e776STheodore Ts'o return 1; 54672035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 54682035e776STheodore Ts'o return 0; 54692035e776STheodore Ts'o return 1; 54702035e776STheodore Ts'o } 547124b58424STheodore Ts'o #else 547224b58424STheodore Ts'o static inline void register_as_ext3(void) { } 547324b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 54742035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 547524b58424STheodore Ts'o #endif 547624b58424STheodore Ts'o 547703010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5478ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 547903010a33STheodore Ts'o .name = "ext4", 5480152a0836SAl Viro .mount = ext4_mount, 5481ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5482ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5483ac27a0ecSDave Kleikamp }; 54847f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5485ac27a0ecSDave Kleikamp 54868f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5487857ac889SLukas Czerner { 5488857ac889SLukas Czerner struct ext4_features *ef; 5489857ac889SLukas Czerner int ret = -ENOMEM; 5490857ac889SLukas Czerner 5491857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5492857ac889SLukas Czerner if (!ef) 5493857ac889SLukas Czerner goto out; 5494857ac889SLukas Czerner 5495857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5496857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5497857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5498857ac889SLukas Czerner "features"); 5499857ac889SLukas Czerner if (ret) { 5500857ac889SLukas Czerner kfree(ef); 5501857ac889SLukas Czerner goto out; 5502857ac889SLukas Czerner } 5503857ac889SLukas Czerner 5504857ac889SLukas Czerner ext4_feat = ef; 5505857ac889SLukas Czerner ret = 0; 5506857ac889SLukas Czerner out: 5507857ac889SLukas Czerner return ret; 5508857ac889SLukas Czerner } 5509857ac889SLukas Czerner 55108f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 55118f021222SLukas Czerner { 55128f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 55138f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 55148f021222SLukas Czerner kfree(ext4_feat); 55158f021222SLukas Czerner } 55168f021222SLukas Czerner 5517e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5518e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5519e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5520e9e3bcecSEric Sandeen 55215dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5522ac27a0ecSDave Kleikamp { 5523e9e3bcecSEric Sandeen int i, err; 5524c9de560dSAlex Tomas 552507c0c5d8SAl Viro ext4_li_info = NULL; 552607c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 552707c0c5d8SAl Viro 55289a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 552912e9b892SDmitry Monakhov ext4_check_flag_values(); 5530e9e3bcecSEric Sandeen 5531e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5532e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5533e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5534e9e3bcecSEric Sandeen } 5535e9e3bcecSEric Sandeen 553651865fdaSZheng Liu err = ext4_init_es(); 55376fd058f7STheodore Ts'o if (err) 55386fd058f7STheodore Ts'o return err; 553951865fdaSZheng Liu 554051865fdaSZheng Liu err = ext4_init_pageio(); 554151865fdaSZheng Liu if (err) 554251865fdaSZheng Liu goto out7; 554351865fdaSZheng Liu 55445dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5545bd2d0210STheodore Ts'o if (err) 5546d44651d0SFabrice Jouhaud goto out6; 55473197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 55480e376b1eSTheodore Ts'o if (!ext4_kset) { 55490e376b1eSTheodore Ts'o err = -ENOMEM; 5550dd68314cSTheodore Ts'o goto out5; 55510e376b1eSTheodore Ts'o } 5552d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5553857ac889SLukas Czerner 5554857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5555dd68314cSTheodore Ts'o if (err) 5556dd68314cSTheodore Ts'o goto out4; 5557857ac889SLukas Czerner 55585dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5559ac27a0ecSDave Kleikamp if (err) 5560c9de560dSAlex Tomas goto out2; 55619c191f70ST Makphaibulchoke else 55629c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5563ac27a0ecSDave Kleikamp err = init_inodecache(); 5564ac27a0ecSDave Kleikamp if (err) 5565ac27a0ecSDave Kleikamp goto out1; 556624b58424STheodore Ts'o register_as_ext3(); 55672035e776STheodore Ts'o register_as_ext2(); 556803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5569ac27a0ecSDave Kleikamp if (err) 5570ac27a0ecSDave Kleikamp goto out; 5571bfff6873SLukas Czerner 5572ac27a0ecSDave Kleikamp return 0; 5573ac27a0ecSDave Kleikamp out: 557424b58424STheodore Ts'o unregister_as_ext2(); 557524b58424STheodore Ts'o unregister_as_ext3(); 5576ac27a0ecSDave Kleikamp destroy_inodecache(); 5577ac27a0ecSDave Kleikamp out1: 55789c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 55795dabfc78STheodore Ts'o ext4_exit_mballoc(); 55809c191f70ST Makphaibulchoke out2: 55818f021222SLukas Czerner ext4_exit_feat_adverts(); 55826fd058f7STheodore Ts'o out4: 5583d44651d0SFabrice Jouhaud if (ext4_proc_root) 5584dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5585dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5586d44651d0SFabrice Jouhaud out5: 5587dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5588d44651d0SFabrice Jouhaud out6: 55895dabfc78STheodore Ts'o ext4_exit_pageio(); 559051865fdaSZheng Liu out7: 559151865fdaSZheng Liu ext4_exit_es(); 559251865fdaSZheng Liu 5593ac27a0ecSDave Kleikamp return err; 5594ac27a0ecSDave Kleikamp } 5595ac27a0ecSDave Kleikamp 55965dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5597ac27a0ecSDave Kleikamp { 5598bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 559924b58424STheodore Ts'o unregister_as_ext2(); 560024b58424STheodore Ts'o unregister_as_ext3(); 560103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5602ac27a0ecSDave Kleikamp destroy_inodecache(); 56035dabfc78STheodore Ts'o ext4_exit_mballoc(); 56048f021222SLukas Czerner ext4_exit_feat_adverts(); 56059f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 56063197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 56075dabfc78STheodore Ts'o ext4_exit_system_zone(); 56085dabfc78STheodore Ts'o ext4_exit_pageio(); 5609dd12ed14SEric Sandeen ext4_exit_es(); 5610ac27a0ecSDave Kleikamp } 5611ac27a0ecSDave Kleikamp 5612ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 561383982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5614ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 56155dabfc78STheodore Ts'o module_init(ext4_init_fs) 56165dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5617