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 */ 10041d1fe1eeSDavid Howells inode = ext4_iget(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 11269ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11279ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11289ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11299ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11309ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11317ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11320930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1133bda32530STheodore Ts'o .sync_fs = ext4_sync_fs, 1134*bb044576STheodore Ts'o .freeze_fs = ext4_freeze, 1135*bb044576STheodore Ts'o .unfreeze_fs = ext4_unfreeze, 11369ca92389STheodore Ts'o .put_super = ext4_put_super, 11379ca92389STheodore Ts'o .statfs = ext4_statfs, 11389ca92389STheodore Ts'o .remount_fs = ext4_remount, 11399ca92389STheodore Ts'o .show_options = ext4_show_options, 11409ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 11419ca92389STheodore Ts'o .quota_read = ext4_quota_read, 11429ca92389STheodore Ts'o .quota_write = ext4_quota_write, 11439ca92389STheodore Ts'o #endif 11449ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 11459ca92389STheodore Ts'o }; 11469ca92389STheodore Ts'o 114739655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11481b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11491b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1150617ba13bSMingming Cao .get_parent = ext4_get_parent, 1151ac27a0ecSDave Kleikamp }; 1152ac27a0ecSDave Kleikamp 1153ac27a0ecSDave Kleikamp enum { 1154ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1155ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 115672578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1157ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 115872578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1159ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1160ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1161ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1162296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1163ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11645a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1165ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1166661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 11671449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 11681449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11695328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1170744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1171fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1172df981d03STheodore Ts'o Opt_max_dir_size_kb, 1173ac27a0ecSDave Kleikamp }; 1174ac27a0ecSDave Kleikamp 1175a447c093SSteven Whitehouse static const match_table_t tokens = { 1176ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1177ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1178ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1179ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1180ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1181ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1182ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1183ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1184ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1185ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1186ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1187ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1188ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1189ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 119072578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 119172578c33STheodore Ts'o {Opt_removed, "orlov"}, 1192ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1193ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1194ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1195ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1196e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11975a916be1STheodore Ts'o {Opt_noload, "noload"}, 119872578c33STheodore Ts'o {Opt_removed, "nobh"}, 119972578c33STheodore Ts'o {Opt_removed, "bh"}, 1200ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 120130773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 120230773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1203ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1204ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1205818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1206818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1207ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1208ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1209ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1210ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12115bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12125bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1213ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1214ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1215ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1216ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1217ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1218ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12195a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1220ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1221ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1222ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1223ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1224ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 122506705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 122606705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 122725ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1228c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 122964769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1230dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 123136ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 123236ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 12336fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12346fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1235240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1236b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1237afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 123806705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 123906705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1240744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1241744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12425328e635SEric Sandeen {Opt_discard, "discard"}, 12435328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1244fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1245fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1246fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1247df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1248c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1249c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1250c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1251c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1252c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1253f3f12faaSJosef Bacik {Opt_err, NULL}, 1254ac27a0ecSDave Kleikamp }; 1255ac27a0ecSDave Kleikamp 1256617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1257ac27a0ecSDave Kleikamp { 1258617ba13bSMingming Cao ext4_fsblk_t sb_block; 1259ac27a0ecSDave Kleikamp char *options = (char *) *data; 1260ac27a0ecSDave Kleikamp 1261ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1262ac27a0ecSDave Kleikamp return 1; /* Default location */ 12630b8e58a1SAndreas Dilger 1264ac27a0ecSDave Kleikamp options += 3; 12650b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1266ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1267ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12684776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1269ac27a0ecSDave Kleikamp (char *) *data); 1270ac27a0ecSDave Kleikamp return 1; 1271ac27a0ecSDave Kleikamp } 1272ac27a0ecSDave Kleikamp if (*options == ',') 1273ac27a0ecSDave Kleikamp options++; 1274ac27a0ecSDave Kleikamp *data = (void *) options; 12750b8e58a1SAndreas Dilger 1276ac27a0ecSDave Kleikamp return sb_block; 1277ac27a0ecSDave Kleikamp } 1278ac27a0ecSDave Kleikamp 1279b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1280437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1281437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1282b3881f74STheodore Ts'o 128356c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 128456c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 128556c50f11SDmitry Monakhov { 128656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 128756c50f11SDmitry Monakhov char *qname; 128803dafb5fSChen Gang int ret = -1; 128956c50f11SDmitry Monakhov 129056c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 129156c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 129256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129356c50f11SDmitry Monakhov "Cannot change journaled " 129456c50f11SDmitry Monakhov "quota options when quota turned on"); 129557f73c2cSTheodore Ts'o return -1; 129656c50f11SDmitry Monakhov } 1297262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1298262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1299262b4662SJan Kara "when QUOTA feature is enabled"); 1300262b4662SJan Kara return -1; 1301262b4662SJan Kara } 130256c50f11SDmitry Monakhov qname = match_strdup(args); 130356c50f11SDmitry Monakhov if (!qname) { 130456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 130556c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 130657f73c2cSTheodore Ts'o return -1; 130756c50f11SDmitry Monakhov } 130803dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 130903dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 131003dafb5fSChen Gang ret = 1; 131103dafb5fSChen Gang else 131256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 131303dafb5fSChen Gang "%s quota file already specified", 131403dafb5fSChen Gang QTYPE2NAME(qtype)); 131503dafb5fSChen Gang goto errout; 131656c50f11SDmitry Monakhov } 131703dafb5fSChen Gang if (strchr(qname, '/')) { 131856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 131956c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 132003dafb5fSChen Gang goto errout; 132156c50f11SDmitry Monakhov } 132203dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1323fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 132456c50f11SDmitry Monakhov return 1; 132503dafb5fSChen Gang errout: 132603dafb5fSChen Gang kfree(qname); 132703dafb5fSChen Gang return ret; 132856c50f11SDmitry Monakhov } 132956c50f11SDmitry Monakhov 133056c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 133156c50f11SDmitry Monakhov { 133256c50f11SDmitry Monakhov 133356c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 133456c50f11SDmitry Monakhov 133556c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 133656c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 133756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 133856c50f11SDmitry Monakhov " when quota turned on"); 133957f73c2cSTheodore Ts'o return -1; 134056c50f11SDmitry Monakhov } 134103dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 134256c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 134356c50f11SDmitry Monakhov return 1; 134456c50f11SDmitry Monakhov } 134556c50f11SDmitry Monakhov #endif 134656c50f11SDmitry Monakhov 134726092bf5STheodore Ts'o #define MOPT_SET 0x0001 134826092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 134926092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 135026092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 135126092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 135226092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 135326092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 135426092bf5STheodore Ts'o #define MOPT_Q 0 135526092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 135626092bf5STheodore Ts'o #else 135726092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 135826092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 135926092bf5STheodore Ts'o #endif 136026092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13618dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13628dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13638dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1364ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 136526092bf5STheodore Ts'o 136626092bf5STheodore Ts'o static const struct mount_opts { 136726092bf5STheodore Ts'o int token; 136826092bf5STheodore Ts'o int mount_opt; 136926092bf5STheodore Ts'o int flags; 137026092bf5STheodore Ts'o } ext4_mount_opts[] = { 137126092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 137226092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 137326092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 137426092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 137526092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 137626092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13778dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13788dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13798dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13808dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 138126092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 138226092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13838dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13848dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13858dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 138659d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 13878dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 13888dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 138926092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13908dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 13918dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13928dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 139326092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 139426092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 139526092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13968dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13978dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13988dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13998dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 140026092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 140126092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 140226092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 140326092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 140426092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 140526092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 140626092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 140726092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 140826092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 140926092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 141026092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 14110efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 14120efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 14130efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 1414ad4eec61SEric Sandeen {Opt_journal_path, 0, MOPT_STRING}, 14150efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 14168dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14178dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14188dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 14198dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 142026092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 142126092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 142226092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 142326092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 142426092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 142526092bf5STheodore Ts'o #else 142626092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 142726092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 142826092bf5STheodore Ts'o #endif 142926092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 143026092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 143126092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 143226092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 143326092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 143426092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 143526092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 143626092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 143726092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 143826092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 143926092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 144026092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 144126092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 144226092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 144326092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 144426092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1445df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 144626092bf5STheodore Ts'o {Opt_err, 0, 0} 144726092bf5STheodore Ts'o }; 144826092bf5STheodore Ts'o 144926092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 145026092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 145126092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 145226092bf5STheodore Ts'o { 145326092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 145426092bf5STheodore Ts'o const struct mount_opts *m; 145508cefc7aSEric W. Biederman kuid_t uid; 145608cefc7aSEric W. Biederman kgid_t gid; 145726092bf5STheodore Ts'o int arg = 0; 145826092bf5STheodore Ts'o 145957f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 146057f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 146157f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 146257f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 146357f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 146457f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 146557f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 146657f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 146757f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 146857f73c2cSTheodore Ts'o #endif 146926092bf5STheodore Ts'o switch (token) { 1470f7048605STheodore Ts'o case Opt_noacl: 1471f7048605STheodore Ts'o case Opt_nouser_xattr: 1472f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1473f7048605STheodore Ts'o break; 147426092bf5STheodore Ts'o case Opt_sb: 147526092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 147626092bf5STheodore Ts'o case Opt_removed: 14775f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 147826092bf5STheodore Ts'o return 1; 147926092bf5STheodore Ts'o case Opt_abort: 148026092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 148126092bf5STheodore Ts'o return 1; 148226092bf5STheodore Ts'o case Opt_i_version: 148326092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 148426092bf5STheodore Ts'o return 1; 148526092bf5STheodore Ts'o } 148626092bf5STheodore Ts'o 14875f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14885f3633e3SJan Kara if (token == m->token) 14895f3633e3SJan Kara break; 14905f3633e3SJan Kara 14915f3633e3SJan Kara if (m->token == Opt_err) { 14925f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 14935f3633e3SJan Kara "or missing value", opt); 14945f3633e3SJan Kara return -1; 14955f3633e3SJan Kara } 14965f3633e3SJan Kara 14978dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 14988dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14998dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 15008dc0aa8cSTheodore Ts'o return -1; 15018dc0aa8cSTheodore Ts'o } 15028dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 15038dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 15048dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 15058dc0aa8cSTheodore Ts'o return -1; 15068dc0aa8cSTheodore Ts'o } 15078dc0aa8cSTheodore Ts'o 1508ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 15090efb3b23SJan Kara return -1; 151026092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 151126092bf5STheodore Ts'o return -1; 151226092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 151326092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 151426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 151526092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 151626092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 151726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 151826092bf5STheodore Ts'o "options when quota turned on"); 151926092bf5STheodore Ts'o return -1; 152026092bf5STheodore Ts'o } 152126092bf5STheodore Ts'o 152226092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 152326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 152426092bf5STheodore Ts'o } else if (token == Opt_commit) { 152526092bf5STheodore Ts'o if (arg == 0) 152626092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 152726092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 152826092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 152926092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 153026092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 153126092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 153226092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1533e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1534e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1535e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1536e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 153726092bf5STheodore Ts'o return -1; 153826092bf5STheodore Ts'o } 153926092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 154026092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 154126092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 154226092bf5STheodore Ts'o if (!args->from) 154326092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 154426092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1545df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1546df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 154726092bf5STheodore Ts'o } else if (token == Opt_stripe) { 154826092bf5STheodore Ts'o sbi->s_stripe = arg; 15490efb3b23SJan Kara } else if (token == Opt_resuid) { 15500efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15510efb3b23SJan Kara if (!uid_valid(uid)) { 15525f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15530efb3b23SJan Kara return -1; 15540efb3b23SJan Kara } 15550efb3b23SJan Kara sbi->s_resuid = uid; 15560efb3b23SJan Kara } else if (token == Opt_resgid) { 15570efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15580efb3b23SJan Kara if (!gid_valid(gid)) { 15595f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15600efb3b23SJan Kara return -1; 15610efb3b23SJan Kara } 15620efb3b23SJan Kara sbi->s_resgid = gid; 15630efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15640efb3b23SJan Kara if (is_remount) { 15650efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15660efb3b23SJan Kara "Cannot specify journal on remount"); 15670efb3b23SJan Kara return -1; 15680efb3b23SJan Kara } 15690efb3b23SJan Kara *journal_devnum = arg; 1570ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1571ad4eec61SEric Sandeen char *journal_path; 1572ad4eec61SEric Sandeen struct inode *journal_inode; 1573ad4eec61SEric Sandeen struct path path; 1574ad4eec61SEric Sandeen int error; 1575ad4eec61SEric Sandeen 1576ad4eec61SEric Sandeen if (is_remount) { 1577ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1578ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1579ad4eec61SEric Sandeen return -1; 1580ad4eec61SEric Sandeen } 1581ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1582ad4eec61SEric Sandeen if (!journal_path) { 1583ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1584ad4eec61SEric Sandeen "journal device string"); 1585ad4eec61SEric Sandeen return -1; 1586ad4eec61SEric Sandeen } 1587ad4eec61SEric Sandeen 1588ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1589ad4eec61SEric Sandeen if (error) { 1590ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1591ad4eec61SEric Sandeen "journal device path: error %d", error); 1592ad4eec61SEric Sandeen kfree(journal_path); 1593ad4eec61SEric Sandeen return -1; 1594ad4eec61SEric Sandeen } 1595ad4eec61SEric Sandeen 1596ad4eec61SEric Sandeen journal_inode = path.dentry->d_inode; 1597ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1598ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1599ad4eec61SEric Sandeen "is not a block device", journal_path); 1600ad4eec61SEric Sandeen path_put(&path); 1601ad4eec61SEric Sandeen kfree(journal_path); 1602ad4eec61SEric Sandeen return -1; 1603ad4eec61SEric Sandeen } 1604ad4eec61SEric Sandeen 1605ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1606ad4eec61SEric Sandeen path_put(&path); 1607ad4eec61SEric Sandeen kfree(journal_path); 16080efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 16090efb3b23SJan Kara if (arg > 7) { 16105f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 16110efb3b23SJan Kara " (must be 0-7)"); 16120efb3b23SJan Kara return -1; 16130efb3b23SJan Kara } 16140efb3b23SJan Kara *journal_ioprio = 16150efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 161626092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 161726092bf5STheodore Ts'o if (is_remount) { 161826092bf5STheodore Ts'o if (!sbi->s_journal) 161926092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 16205f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 162126092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 162226092bf5STheodore Ts'o "Cannot change data mode on remount"); 162326092bf5STheodore Ts'o return -1; 162426092bf5STheodore Ts'o } 162526092bf5STheodore Ts'o } else { 162626092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 162726092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 162826092bf5STheodore Ts'o } 162926092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 163026092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 163126092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 163226092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16335f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16345f3633e3SJan Kara "quota options when quota turned on"); 163526092bf5STheodore Ts'o return -1; 163626092bf5STheodore Ts'o } 1637262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1638262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1639262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1640262b4662SJan Kara "Cannot set journaled quota options " 1641262b4662SJan Kara "when QUOTA feature is enabled"); 1642262b4662SJan Kara return -1; 1643262b4662SJan Kara } 164426092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 164526092bf5STheodore Ts'o #endif 164626092bf5STheodore Ts'o } else { 164726092bf5STheodore Ts'o if (!args->from) 164826092bf5STheodore Ts'o arg = 1; 164926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 165026092bf5STheodore Ts'o arg = !arg; 165126092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 165226092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 165326092bf5STheodore Ts'o "buggy handling of option %s", opt); 165426092bf5STheodore Ts'o WARN_ON(1); 165526092bf5STheodore Ts'o return -1; 165626092bf5STheodore Ts'o } 165726092bf5STheodore Ts'o if (arg != 0) 165826092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 165926092bf5STheodore Ts'o else 166026092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 166126092bf5STheodore Ts'o } 166226092bf5STheodore Ts'o return 1; 166326092bf5STheodore Ts'o } 166426092bf5STheodore Ts'o 1665ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1666c3191067STheodore Ts'o unsigned long *journal_devnum, 1667b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1668661aa520SEric Sandeen int is_remount) 1669ac27a0ecSDave Kleikamp { 1670617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1671ac27a0ecSDave Kleikamp char *p; 1672ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 167326092bf5STheodore Ts'o int token; 1674ac27a0ecSDave Kleikamp 1675ac27a0ecSDave Kleikamp if (!options) 1676ac27a0ecSDave Kleikamp return 1; 1677ac27a0ecSDave Kleikamp 1678ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1679ac27a0ecSDave Kleikamp if (!*p) 1680ac27a0ecSDave Kleikamp continue; 168115121c18SEric Sandeen /* 168215121c18SEric Sandeen * Initialize args struct so we know whether arg was 168315121c18SEric Sandeen * found; some options take optional arguments. 168415121c18SEric Sandeen */ 1685caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1686ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 168726092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 168826092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1689ac27a0ecSDave Kleikamp return 0; 1690ac27a0ecSDave Kleikamp } 1691ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1692262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1693262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1694262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1695262b4662SJan Kara "feature is enabled"); 1696262b4662SJan Kara return 0; 1697262b4662SJan Kara } 1698ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1699482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1700fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1701ac27a0ecSDave Kleikamp 1702482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1703fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1704ac27a0ecSDave Kleikamp 170556c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1706b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1707b31e1552SEric Sandeen "format mixing"); 1708ac27a0ecSDave Kleikamp return 0; 1709ac27a0ecSDave Kleikamp } 1710ac27a0ecSDave Kleikamp 1711ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1712b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1713b31e1552SEric Sandeen "not specified"); 1714ac27a0ecSDave Kleikamp return 0; 1715ac27a0ecSDave Kleikamp } 1716ac27a0ecSDave Kleikamp } 1717ac27a0ecSDave Kleikamp #endif 1718261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1719261cb20cSJan Kara int blocksize = 1720261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1721261cb20cSJan Kara 1722261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1723261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1724261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1725261cb20cSJan Kara return 0; 1726261cb20cSJan Kara } 1727261cb20cSJan Kara } 1728ac27a0ecSDave Kleikamp return 1; 1729ac27a0ecSDave Kleikamp } 1730ac27a0ecSDave Kleikamp 17312adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17322adf6da8STheodore Ts'o struct super_block *sb) 17332adf6da8STheodore Ts'o { 17342adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17352adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17362adf6da8STheodore Ts'o 17372adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17382adf6da8STheodore Ts'o char *fmtname = ""; 17392adf6da8STheodore Ts'o 17402adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17412adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17422adf6da8STheodore Ts'o fmtname = "vfsold"; 17432adf6da8STheodore Ts'o break; 17442adf6da8STheodore Ts'o case QFMT_VFS_V0: 17452adf6da8STheodore Ts'o fmtname = "vfsv0"; 17462adf6da8STheodore Ts'o break; 17472adf6da8STheodore Ts'o case QFMT_VFS_V1: 17482adf6da8STheodore Ts'o fmtname = "vfsv1"; 17492adf6da8STheodore Ts'o break; 17502adf6da8STheodore Ts'o } 17512adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17522adf6da8STheodore Ts'o } 17532adf6da8STheodore Ts'o 17542adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17552adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17562adf6da8STheodore Ts'o 17572adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17582adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17592adf6da8STheodore Ts'o #endif 17602adf6da8STheodore Ts'o } 17612adf6da8STheodore Ts'o 17625a916be1STheodore Ts'o static const char *token2str(int token) 17635a916be1STheodore Ts'o { 176450df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17655a916be1STheodore Ts'o 17665a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17675a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17685a916be1STheodore Ts'o break; 17695a916be1STheodore Ts'o return t->pattern; 17705a916be1STheodore Ts'o } 17715a916be1STheodore Ts'o 17722adf6da8STheodore Ts'o /* 17732adf6da8STheodore Ts'o * Show an option if 17742adf6da8STheodore Ts'o * - it's set to a non-default value OR 17752adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17762adf6da8STheodore Ts'o */ 177766acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 177866acdcf4STheodore Ts'o int nodefs) 17792adf6da8STheodore Ts'o { 17802adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17812adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 178266acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17835a916be1STheodore Ts'o const struct mount_opts *m; 178466acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17852adf6da8STheodore Ts'o 178666acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 178766acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17882adf6da8STheodore Ts'o 17892adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17905a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17915a916be1STheodore Ts'o 17925a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17935a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17945a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17955a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17965a916be1STheodore Ts'o continue; 179766acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17985a916be1STheodore Ts'o continue; /* skip if same as the default */ 17995a916be1STheodore Ts'o if ((want_set && 18005a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 18015a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 18025a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 18035a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 18045a916be1STheodore Ts'o } 18055a916be1STheodore Ts'o 180608cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 18075a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 180808cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 180908cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 181008cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 18115a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 181208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 181308cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 181466acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 18155a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18165a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18172adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18185a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18192adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18205a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 182166acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18225a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 182366acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18245a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 182566acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18265a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18272adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18285a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 182966acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18305a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 183166acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18322adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18335a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18342adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18355a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18362adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18375a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18385a916be1STheodore Ts'o } 183966acdcf4STheodore Ts'o if (nodefs || 184066acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18415a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18422adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18432adf6da8STheodore Ts'o 184466acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 184566acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18465a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1847df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1848df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18492adf6da8STheodore Ts'o 18502adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18512adf6da8STheodore Ts'o return 0; 18522adf6da8STheodore Ts'o } 18532adf6da8STheodore Ts'o 185466acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 185566acdcf4STheodore Ts'o { 185666acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 185766acdcf4STheodore Ts'o } 185866acdcf4STheodore Ts'o 185966acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 186066acdcf4STheodore Ts'o { 186166acdcf4STheodore Ts'o struct super_block *sb = seq->private; 186266acdcf4STheodore Ts'o int rc; 186366acdcf4STheodore Ts'o 186466acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 186566acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 186666acdcf4STheodore Ts'o seq_puts(seq, "\n"); 186766acdcf4STheodore Ts'o return rc; 186866acdcf4STheodore Ts'o } 186966acdcf4STheodore Ts'o 187066acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 187166acdcf4STheodore Ts'o { 1872d9dda78bSAl Viro return single_open(file, options_seq_show, PDE_DATA(inode)); 187366acdcf4STheodore Ts'o } 187466acdcf4STheodore Ts'o 187566acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 187666acdcf4STheodore Ts'o .owner = THIS_MODULE, 187766acdcf4STheodore Ts'o .open = options_open_fs, 187866acdcf4STheodore Ts'o .read = seq_read, 187966acdcf4STheodore Ts'o .llseek = seq_lseek, 188066acdcf4STheodore Ts'o .release = single_release, 188166acdcf4STheodore Ts'o }; 188266acdcf4STheodore Ts'o 1883617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1884ac27a0ecSDave Kleikamp int read_only) 1885ac27a0ecSDave Kleikamp { 1886617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1887ac27a0ecSDave Kleikamp int res = 0; 1888ac27a0ecSDave Kleikamp 1889617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1890b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1891b31e1552SEric Sandeen "forcing read-only mode"); 1892ac27a0ecSDave Kleikamp res = MS_RDONLY; 1893ac27a0ecSDave Kleikamp } 1894ac27a0ecSDave Kleikamp if (read_only) 1895281b5995STheodore Ts'o goto done; 1896617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1897b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1898b31e1552SEric Sandeen "running e2fsck is recommended"); 1899c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 1900b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1901b31e1552SEric Sandeen "warning: mounting fs with errors, " 1902b31e1552SEric Sandeen "running e2fsck is recommended"); 1903ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1904ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1905ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1906b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1907b31e1552SEric Sandeen "warning: maximal mount count reached, " 1908b31e1552SEric Sandeen "running e2fsck is recommended"); 1909ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1910ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1911ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1912b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1913b31e1552SEric Sandeen "warning: checktime reached, " 1914b31e1552SEric Sandeen "running e2fsck is recommended"); 19150390131bSFrank Mayhar if (!sbi->s_journal) 1916216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1917ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1918617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1919e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1920ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1921617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19220390131bSFrank Mayhar if (sbi->s_journal) 1923617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1924ac27a0ecSDave Kleikamp 1925e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1926281b5995STheodore Ts'o done: 1927ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1928a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1929a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1930ac27a0ecSDave Kleikamp sb->s_blocksize, 1931ac27a0ecSDave Kleikamp sbi->s_groups_count, 1932617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1933617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1934a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1935ac27a0ecSDave Kleikamp 19367abc52c2SDan Magenheimer cleancache_init_fs(sb); 1937ac27a0ecSDave Kleikamp return res; 1938ac27a0ecSDave Kleikamp } 1939ac27a0ecSDave Kleikamp 1940117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1941117fff10STheodore Ts'o { 1942117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1943117fff10STheodore Ts'o struct flex_groups *new_groups; 1944117fff10STheodore Ts'o int size; 1945117fff10STheodore Ts'o 1946117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1947117fff10STheodore Ts'o return 0; 1948117fff10STheodore Ts'o 1949117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1950117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1951117fff10STheodore Ts'o return 0; 1952117fff10STheodore Ts'o 1953117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1954117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1955117fff10STheodore Ts'o if (!new_groups) { 1956117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1957117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1958117fff10STheodore Ts'o return -ENOMEM; 1959117fff10STheodore Ts'o } 1960117fff10STheodore Ts'o 1961117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1962117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1963117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1964117fff10STheodore Ts'o sizeof(struct flex_groups))); 1965117fff10STheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 1966117fff10STheodore Ts'o } 1967117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1968117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1969117fff10STheodore Ts'o return 0; 1970117fff10STheodore Ts'o } 1971117fff10STheodore Ts'o 1972772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1973772cb7c8SJose R. Santos { 1974772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1975772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1976772cb7c8SJose R. Santos ext4_group_t flex_group; 1977117fff10STheodore Ts'o int i, err; 1978772cb7c8SJose R. Santos 1979503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1980d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1981772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1982772cb7c8SJose R. Santos return 1; 1983772cb7c8SJose R. Santos } 1984772cb7c8SJose R. Santos 1985117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1986117fff10STheodore Ts'o if (err) 1987772cb7c8SJose R. Santos goto failed; 1988772cb7c8SJose R. Santos 1989772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 199088b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1991772cb7c8SJose R. Santos 1992772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19937ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19947ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 199590ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 199624aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19977ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19987ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1999772cb7c8SJose R. Santos } 2000772cb7c8SJose R. Santos 2001772cb7c8SJose R. Santos return 1; 2002772cb7c8SJose R. Santos failed: 2003772cb7c8SJose R. Santos return 0; 2004772cb7c8SJose R. Santos } 2005772cb7c8SJose R. Santos 2006feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 2007717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2008717d50e4SAndreas Dilger { 2009feb0ab32SDarrick J. Wong int offset; 2010717d50e4SAndreas Dilger __u16 crc = 0; 2011717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2012717d50e4SAndreas Dilger 2013feb0ab32SDarrick J. Wong if ((sbi->s_es->s_feature_ro_compat & 2014feb0ab32SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { 2015feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2016d6a77105STheodore Ts'o __le16 save_csum; 2017feb0ab32SDarrick J. Wong __u32 csum32; 2018feb0ab32SDarrick J. Wong 2019d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 2020feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 2021feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2022feb0ab32SDarrick J. Wong sizeof(le_group)); 2023feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2024feb0ab32SDarrick J. Wong sbi->s_desc_size); 2025d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 2026feb0ab32SDarrick J. Wong 2027feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2028feb0ab32SDarrick J. Wong goto out; 2029feb0ab32SDarrick J. Wong } 2030feb0ab32SDarrick J. Wong 2031feb0ab32SDarrick J. Wong /* old crc16 code */ 2032feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2033feb0ab32SDarrick J. Wong 2034717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2035717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2036717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2037717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2038717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2039717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2040717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2041717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2042717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2043717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2044717d50e4SAndreas Dilger offset); 2045717d50e4SAndreas Dilger 2046feb0ab32SDarrick J. Wong out: 2047717d50e4SAndreas Dilger return cpu_to_le16(crc); 2048717d50e4SAndreas Dilger } 2049717d50e4SAndreas Dilger 2050feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2051717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2052717d50e4SAndreas Dilger { 2053feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2054feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2055feb0ab32SDarrick J. Wong block_group, gdp))) 2056717d50e4SAndreas Dilger return 0; 2057717d50e4SAndreas Dilger 2058717d50e4SAndreas Dilger return 1; 2059717d50e4SAndreas Dilger } 2060717d50e4SAndreas Dilger 2061feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2062feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2063feb0ab32SDarrick J. Wong { 2064feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2065feb0ab32SDarrick J. Wong return; 2066feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2067feb0ab32SDarrick J. Wong } 2068feb0ab32SDarrick J. Wong 2069ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2070bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2071bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2072ac27a0ecSDave Kleikamp { 2073617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2074617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2075617ba13bSMingming Cao ext4_fsblk_t last_block; 2076bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2077bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2078bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2079ce421581SJose R. Santos int flexbg_flag = 0; 2080bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2081ac27a0ecSDave Kleikamp 2082ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2083ce421581SJose R. Santos flexbg_flag = 1; 2084ce421581SJose R. Santos 2085617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2086ac27a0ecSDave Kleikamp 2087197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2088197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2089197cd65aSAkinobu Mita 2090ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2091bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2092ac27a0ecSDave Kleikamp else 2093ac27a0ecSDave Kleikamp last_block = first_block + 2094617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2095ac27a0ecSDave Kleikamp 2096bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2097bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2098bfff6873SLukas Czerner grp = i; 2099bfff6873SLukas Czerner 21008fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 21012b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2102b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2103a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2104b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2105ac27a0ecSDave Kleikamp return 0; 2106ac27a0ecSDave Kleikamp } 21078fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 21082b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2109b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2110a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2111b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2112ac27a0ecSDave Kleikamp return 0; 2113ac27a0ecSDave Kleikamp } 21148fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2115bd81d8eeSLaurent Vivier if (inode_table < first_block || 21162b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2117b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2118a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2119b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2120ac27a0ecSDave Kleikamp return 0; 2121ac27a0ecSDave Kleikamp } 2122955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2123feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2124b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2125b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2126fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2127fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21287ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2129955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2130717d50e4SAndreas Dilger return 0; 2131717d50e4SAndreas Dilger } 21327ee1ec4cSLi Zefan } 2133955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2134ce421581SJose R. Santos if (!flexbg_flag) 2135617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2136ac27a0ecSDave Kleikamp } 2137bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2138bfff6873SLukas Czerner *first_not_zeroed = grp; 2139ac27a0ecSDave Kleikamp return 1; 2140ac27a0ecSDave Kleikamp } 2141ac27a0ecSDave Kleikamp 2142617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2143ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2144ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2145ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2146ac27a0ecSDave Kleikamp * 2147ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2148ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2149ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2150ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2151ac27a0ecSDave Kleikamp * 2152ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2153ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2154ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2155617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2156ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2157ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2158ac27a0ecSDave Kleikamp */ 2159617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2160617ba13bSMingming Cao struct ext4_super_block *es) 2161ac27a0ecSDave Kleikamp { 2162ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2163ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2164ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2165ac27a0ecSDave Kleikamp int i; 2166ac27a0ecSDave Kleikamp #endif 2167ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2168ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2169ac27a0ecSDave Kleikamp return; 2170ac27a0ecSDave Kleikamp } 2171ac27a0ecSDave Kleikamp 2172a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2173b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2174b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2175a8f48a95SEric Sandeen return; 2176a8f48a95SEric Sandeen } 2177a8f48a95SEric Sandeen 2178d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2179d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2180d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2181d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2182d39195c3SAmir Goldstein return; 2183d39195c3SAmir Goldstein } 2184d39195c3SAmir Goldstein 2185617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2186c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2187c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 218884474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2189ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2190ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2191c25f9bc6SEric Sandeen } 2192ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2193ac27a0ecSDave Kleikamp return; 2194ac27a0ecSDave Kleikamp } 2195ac27a0ecSDave Kleikamp 2196ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2197b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2198ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2199ac27a0ecSDave Kleikamp } 2200ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2201ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2202ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2203ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2204a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2205617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2206617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2207ac27a0ecSDave Kleikamp if (ret < 0) 2208b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2209b31e1552SEric Sandeen "Cannot turn on journaled " 2210b31e1552SEric Sandeen "quota: error %d", ret); 2211ac27a0ecSDave Kleikamp } 2212ac27a0ecSDave Kleikamp } 2213ac27a0ecSDave Kleikamp #endif 2214ac27a0ecSDave Kleikamp 2215ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2216ac27a0ecSDave Kleikamp struct inode *inode; 2217ac27a0ecSDave Kleikamp 221897bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 221997bd42b9SJosef Bacik if (IS_ERR(inode)) { 2220ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2221ac27a0ecSDave Kleikamp break; 2222ac27a0ecSDave Kleikamp } 2223ac27a0ecSDave Kleikamp 2224617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2225871a2931SChristoph Hellwig dquot_initialize(inode); 2226ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2227566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2228b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2229b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 223046e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2231e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2232ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2233721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 223455f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2235617ba13bSMingming Cao ext4_truncate(inode); 2236721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2237ac27a0ecSDave Kleikamp nr_truncates++; 2238ac27a0ecSDave Kleikamp } else { 2239566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2240b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2241b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 224246e665e9SHarvey Harrison __func__, inode->i_ino); 2243ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2244ac27a0ecSDave Kleikamp inode->i_ino); 2245ac27a0ecSDave Kleikamp nr_orphans++; 2246ac27a0ecSDave Kleikamp } 2247ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2248ac27a0ecSDave Kleikamp } 2249ac27a0ecSDave Kleikamp 2250ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2251ac27a0ecSDave Kleikamp 2252ac27a0ecSDave Kleikamp if (nr_orphans) 2253b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2254b31e1552SEric Sandeen PLURAL(nr_orphans)); 2255ac27a0ecSDave Kleikamp if (nr_truncates) 2256b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2257b31e1552SEric Sandeen PLURAL(nr_truncates)); 2258ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2259ac27a0ecSDave Kleikamp /* Turn quotas off */ 2260a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2261ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2262287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2263ac27a0ecSDave Kleikamp } 2264ac27a0ecSDave Kleikamp #endif 2265ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2266ac27a0ecSDave Kleikamp } 22670b8e58a1SAndreas Dilger 2268cd2291a4SEric Sandeen /* 2269cd2291a4SEric Sandeen * Maximal extent format file size. 2270cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2271cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2272cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2273cd2291a4SEric Sandeen * so that won't be a limiting factor. 2274cd2291a4SEric Sandeen * 2275f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2276f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2277f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2278f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2279f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2280f17722f9SLukas Czerner * 2281cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2282cd2291a4SEric Sandeen */ 2283f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2284cd2291a4SEric Sandeen { 2285cd2291a4SEric Sandeen loff_t res; 2286cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2287cd2291a4SEric Sandeen 2288cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2289f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2290cd2291a4SEric Sandeen /* 229190c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2292cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2293cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2294cd2291a4SEric Sandeen */ 2295cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2296cd2291a4SEric Sandeen 2297cd2291a4SEric Sandeen /* total blocks in file system block size */ 2298cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2299cd2291a4SEric Sandeen upper_limit <<= blkbits; 2300cd2291a4SEric Sandeen } 2301cd2291a4SEric Sandeen 2302f17722f9SLukas Czerner /* 2303f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2304f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2305f17722f9SLukas Czerner * size 2306f17722f9SLukas Czerner */ 2307f17722f9SLukas Czerner res = (1LL << 32) - 1; 2308cd2291a4SEric Sandeen res <<= blkbits; 2309cd2291a4SEric Sandeen 2310cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2311cd2291a4SEric Sandeen if (res > upper_limit) 2312cd2291a4SEric Sandeen res = upper_limit; 2313cd2291a4SEric Sandeen 2314cd2291a4SEric Sandeen return res; 2315cd2291a4SEric Sandeen } 2316ac27a0ecSDave Kleikamp 2317ac27a0ecSDave Kleikamp /* 2318cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23190fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23200fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2321ac27a0ecSDave Kleikamp */ 2322f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2323ac27a0ecSDave Kleikamp { 2324617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23250fc1b451SAneesh Kumar K.V int meta_blocks; 23260fc1b451SAneesh Kumar K.V loff_t upper_limit; 23270b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23280b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23290b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23300b8e58a1SAndreas Dilger * 23310b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23320b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23330fc1b451SAneesh Kumar K.V */ 23340fc1b451SAneesh Kumar K.V 2335f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23360fc1b451SAneesh Kumar K.V /* 233790c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23380b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23390b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23400fc1b451SAneesh Kumar K.V */ 23410fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23420fc1b451SAneesh Kumar K.V 23430fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23440fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23450fc1b451SAneesh Kumar K.V 23460fc1b451SAneesh Kumar K.V } else { 23478180a562SAneesh Kumar K.V /* 23488180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23498180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23508180a562SAneesh Kumar K.V * represent total number of blocks in 23518180a562SAneesh Kumar K.V * file system block size 23528180a562SAneesh Kumar K.V */ 23530fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23540fc1b451SAneesh Kumar K.V 23550fc1b451SAneesh Kumar K.V } 23560fc1b451SAneesh Kumar K.V 23570fc1b451SAneesh Kumar K.V /* indirect blocks */ 23580fc1b451SAneesh Kumar K.V meta_blocks = 1; 23590fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23600fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23610fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23620fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23630fc1b451SAneesh Kumar K.V 23640fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23650fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2366ac27a0ecSDave Kleikamp 2367ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2368ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2369ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2370ac27a0ecSDave Kleikamp res <<= bits; 2371ac27a0ecSDave Kleikamp if (res > upper_limit) 2372ac27a0ecSDave Kleikamp res = upper_limit; 23730fc1b451SAneesh Kumar K.V 23740fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23750fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23760fc1b451SAneesh Kumar K.V 2377ac27a0ecSDave Kleikamp return res; 2378ac27a0ecSDave Kleikamp } 2379ac27a0ecSDave Kleikamp 2380617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 238170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2382ac27a0ecSDave Kleikamp { 2383617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2384fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2385ac27a0ecSDave Kleikamp int has_super = 0; 2386ac27a0ecSDave Kleikamp 2387ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2388ac27a0ecSDave Kleikamp 2389617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2390ac27a0ecSDave Kleikamp nr < first_meta_bg) 239170bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2392ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2393617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2394ac27a0ecSDave Kleikamp has_super = 1; 23950b8e58a1SAndreas Dilger 2396bd63f6b0SDarrick J. Wong /* 2397bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2398bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2399bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2400bd63f6b0SDarrick J. Wong * compensate. 2401bd63f6b0SDarrick J. Wong */ 2402bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2403bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2404bd63f6b0SDarrick J. Wong has_super++; 2405bd63f6b0SDarrick J. Wong 2406617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2407ac27a0ecSDave Kleikamp } 2408ac27a0ecSDave Kleikamp 2409c9de560dSAlex Tomas /** 2410c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2411c9de560dSAlex Tomas * @sbi: In memory super block info 2412c9de560dSAlex Tomas * 2413c9de560dSAlex Tomas * If we have specified it via mount option, then 2414c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2415c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2416c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2417c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2418c9de560dSAlex Tomas * 2419c9de560dSAlex Tomas */ 2420c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2421c9de560dSAlex Tomas { 2422c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2423c9de560dSAlex Tomas unsigned long stripe_width = 2424c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24253eb08658SDan Ehrenberg int ret; 2426c9de560dSAlex Tomas 2427c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24283eb08658SDan Ehrenberg ret = sbi->s_stripe; 24293eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24303eb08658SDan Ehrenberg ret = stripe_width; 24313eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24323eb08658SDan Ehrenberg ret = stride; 24333eb08658SDan Ehrenberg else 24343eb08658SDan Ehrenberg ret = 0; 2435c9de560dSAlex Tomas 24363eb08658SDan Ehrenberg /* 24373eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24383eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24393eb08658SDan Ehrenberg */ 24403eb08658SDan Ehrenberg if (ret <= 1) 24413eb08658SDan Ehrenberg ret = 0; 2442c9de560dSAlex Tomas 24433eb08658SDan Ehrenberg return ret; 2444c9de560dSAlex Tomas } 2445ac27a0ecSDave Kleikamp 24463197ebdbSTheodore Ts'o /* sysfs supprt */ 24473197ebdbSTheodore Ts'o 24483197ebdbSTheodore Ts'o struct ext4_attr { 24493197ebdbSTheodore Ts'o struct attribute attr; 24503197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24513197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24523197ebdbSTheodore Ts'o const char *, size_t); 2453f2d50a65SJan Kara union { 24543197ebdbSTheodore Ts'o int offset; 2455f2d50a65SJan Kara int deprecated_val; 2456f2d50a65SJan Kara } u; 24573197ebdbSTheodore Ts'o }; 24583197ebdbSTheodore Ts'o 245927dd4385SLukas Czerner static int parse_strtoull(const char *buf, 246027dd4385SLukas Czerner unsigned long long max, unsigned long long *value) 246127dd4385SLukas Czerner { 246227dd4385SLukas Czerner int ret; 246327dd4385SLukas Czerner 246427dd4385SLukas Czerner ret = kstrtoull(skip_spaces(buf), 0, value); 246527dd4385SLukas Czerner if (!ret && *value > max) 246627dd4385SLukas Czerner ret = -EINVAL; 246727dd4385SLukas Czerner return ret; 246827dd4385SLukas Czerner } 246927dd4385SLukas Czerner 24703197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24713197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24723197ebdbSTheodore Ts'o char *buf) 24733197ebdbSTheodore Ts'o { 24743197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24757b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24767b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24773197ebdbSTheodore Ts'o } 24783197ebdbSTheodore Ts'o 24793197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24803197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24813197ebdbSTheodore Ts'o { 24823197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24833197ebdbSTheodore Ts'o 2484f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2485f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24863197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24873197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24883197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24893197ebdbSTheodore Ts'o } 24903197ebdbSTheodore Ts'o 24913197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24923197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24933197ebdbSTheodore Ts'o { 24943197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24953197ebdbSTheodore Ts'o 2496f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2497f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24983197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2499a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 25003197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2501a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 25023197ebdbSTheodore Ts'o } 25033197ebdbSTheodore Ts'o 25043197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 25053197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25063197ebdbSTheodore Ts'o const char *buf, size_t count) 25073197ebdbSTheodore Ts'o { 25083197ebdbSTheodore Ts'o unsigned long t; 2509e1091b15SLukas Czerner int ret; 25103197ebdbSTheodore Ts'o 2511e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2512e1091b15SLukas Czerner if (ret) 2513e1091b15SLukas Czerner return ret; 25143197ebdbSTheodore Ts'o 2515e1091b15SLukas Czerner if (t && (!is_power_of_2(t) || t > 0x40000000)) 25163197ebdbSTheodore Ts'o return -EINVAL; 25173197ebdbSTheodore Ts'o 25183197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 25193197ebdbSTheodore Ts'o return count; 25203197ebdbSTheodore Ts'o } 25213197ebdbSTheodore Ts'o 25223197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25233197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25243197ebdbSTheodore Ts'o { 2525f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25263197ebdbSTheodore Ts'o 25273197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25283197ebdbSTheodore Ts'o } 25293197ebdbSTheodore Ts'o 25303197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25313197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25323197ebdbSTheodore Ts'o const char *buf, size_t count) 25333197ebdbSTheodore Ts'o { 2534f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25353197ebdbSTheodore Ts'o unsigned long t; 2536e1091b15SLukas Czerner int ret; 25373197ebdbSTheodore Ts'o 2538e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2539e1091b15SLukas Czerner if (ret) 2540e1091b15SLukas Czerner return ret; 25413197ebdbSTheodore Ts'o *ui = t; 25423197ebdbSTheodore Ts'o return count; 25433197ebdbSTheodore Ts'o } 25443197ebdbSTheodore Ts'o 254552c198c6SLukas Czerner static ssize_t es_ui_show(struct ext4_attr *a, 254652c198c6SLukas Czerner struct ext4_sb_info *sbi, char *buf) 254752c198c6SLukas Czerner { 254852c198c6SLukas Czerner 254952c198c6SLukas Czerner unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) + 255052c198c6SLukas Czerner a->u.offset); 255152c198c6SLukas Czerner 255252c198c6SLukas Czerner return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 255352c198c6SLukas Czerner } 255452c198c6SLukas Czerner 255527dd4385SLukas Czerner static ssize_t reserved_clusters_show(struct ext4_attr *a, 255627dd4385SLukas Czerner struct ext4_sb_info *sbi, char *buf) 255727dd4385SLukas Czerner { 255827dd4385SLukas Czerner return snprintf(buf, PAGE_SIZE, "%llu\n", 255927dd4385SLukas Czerner (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); 256027dd4385SLukas Czerner } 256127dd4385SLukas Czerner 256227dd4385SLukas Czerner static ssize_t reserved_clusters_store(struct ext4_attr *a, 256327dd4385SLukas Czerner struct ext4_sb_info *sbi, 256427dd4385SLukas Czerner const char *buf, size_t count) 256527dd4385SLukas Czerner { 256627dd4385SLukas Czerner unsigned long long val; 256727dd4385SLukas Czerner int ret; 256827dd4385SLukas Czerner 256927dd4385SLukas Czerner if (parse_strtoull(buf, -1ULL, &val)) 257027dd4385SLukas Czerner return -EINVAL; 257127dd4385SLukas Czerner ret = ext4_reserve_clusters(sbi, val); 257227dd4385SLukas Czerner 257327dd4385SLukas Czerner return ret ? ret : count; 257427dd4385SLukas Czerner } 257527dd4385SLukas Czerner 25762c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25772c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25782c0544b2STheodore Ts'o const char *buf, size_t count) 25792c0544b2STheodore Ts'o { 25802c0544b2STheodore Ts'o int len = count; 25812c0544b2STheodore Ts'o 25822c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25832c0544b2STheodore Ts'o return -EPERM; 25842c0544b2STheodore Ts'o 25852c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25862c0544b2STheodore Ts'o len--; 25872c0544b2STheodore Ts'o 25882c0544b2STheodore Ts'o if (len) 25892c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25902c0544b2STheodore Ts'o return count; 25912c0544b2STheodore Ts'o } 25922c0544b2STheodore Ts'o 2593f2d50a65SJan Kara static ssize_t sbi_deprecated_show(struct ext4_attr *a, 2594f2d50a65SJan Kara struct ext4_sb_info *sbi, char *buf) 2595f2d50a65SJan Kara { 2596f2d50a65SJan Kara return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); 2597f2d50a65SJan Kara } 2598f2d50a65SJan Kara 25993197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 26003197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 26013197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 26023197ebdbSTheodore Ts'o .show = _show, \ 26033197ebdbSTheodore Ts'o .store = _store, \ 2604f2d50a65SJan Kara .u = { \ 26053197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname),\ 2606f2d50a65SJan Kara }, \ 26073197ebdbSTheodore Ts'o } 260852c198c6SLukas Czerner 260952c198c6SLukas Czerner #define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \ 261052c198c6SLukas Czerner static struct ext4_attr ext4_attr_##_name = { \ 261152c198c6SLukas Czerner .attr = {.name = __stringify(_name), .mode = _mode }, \ 261252c198c6SLukas Czerner .show = _show, \ 261352c198c6SLukas Czerner .store = _store, \ 261452c198c6SLukas Czerner .u = { \ 261552c198c6SLukas Czerner .offset = offsetof(struct ext4_super_block, _elname), \ 261652c198c6SLukas Czerner }, \ 261752c198c6SLukas Czerner } 261852c198c6SLukas Czerner 26193197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 26203197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 26213197ebdbSTheodore Ts'o 2622857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 26233197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 26243197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 262552c198c6SLukas Czerner 262652c198c6SLukas Czerner #define EXT4_RO_ATTR_ES_UI(name, elname) \ 262752c198c6SLukas Czerner EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname) 26283197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 26293197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 263052c198c6SLukas Czerner 26313197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 2632f2d50a65SJan Kara #define EXT4_DEPRECATED_ATTR(_name, _val) \ 2633f2d50a65SJan Kara static struct ext4_attr ext4_attr_##_name = { \ 2634f2d50a65SJan Kara .attr = {.name = __stringify(_name), .mode = 0444 }, \ 2635f2d50a65SJan Kara .show = sbi_deprecated_show, \ 2636f2d50a65SJan Kara .u = { \ 2637f2d50a65SJan Kara .deprecated_val = _val, \ 2638f2d50a65SJan Kara }, \ 2639f2d50a65SJan Kara } 26403197ebdbSTheodore Ts'o 26413197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 26423197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 26433197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 264427dd4385SLukas Czerner EXT4_RW_ATTR(reserved_clusters); 26453197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 26463197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 264711013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 26483197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 26493197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 26503197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 26513197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26523197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26533197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 2654f2d50a65SJan Kara EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); 265567a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 26562c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 2657efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 2658efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 2659efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 2660efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 2661efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 2662efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 266352c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 266452c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); 266552c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); 26663197ebdbSTheodore Ts'o 26673197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26683197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26693197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26703197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 267127dd4385SLukas Czerner ATTR_LIST(reserved_clusters), 26723197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 267311013911SAndreas Dilger ATTR_LIST(inode_goal), 26743197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26753197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26763197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26773197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26783197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26793197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 268055138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 268167a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 26822c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 2683efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 2684efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_burst), 2685efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 2686efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 2687efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 2688efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 268952c198c6SLukas Czerner ATTR_LIST(errors_count), 269052c198c6SLukas Czerner ATTR_LIST(first_error_time), 269152c198c6SLukas Czerner ATTR_LIST(last_error_time), 26923197ebdbSTheodore Ts'o NULL, 26933197ebdbSTheodore Ts'o }; 26943197ebdbSTheodore Ts'o 2695857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2696857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 269727ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 26985e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2699857ac889SLukas Czerner 2700857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2701857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 270227ee40dfSLukas Czerner ATTR_LIST(batched_discard), 27035e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2704857ac889SLukas Czerner NULL, 2705857ac889SLukas Czerner }; 2706857ac889SLukas Czerner 27073197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 27083197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 27093197ebdbSTheodore Ts'o { 27103197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27113197ebdbSTheodore Ts'o s_kobj); 27123197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27133197ebdbSTheodore Ts'o 27143197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 27153197ebdbSTheodore Ts'o } 27163197ebdbSTheodore Ts'o 27173197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 27183197ebdbSTheodore Ts'o struct attribute *attr, 27193197ebdbSTheodore Ts'o const char *buf, size_t len) 27203197ebdbSTheodore Ts'o { 27213197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27223197ebdbSTheodore Ts'o s_kobj); 27233197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27243197ebdbSTheodore Ts'o 27253197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 27263197ebdbSTheodore Ts'o } 27273197ebdbSTheodore Ts'o 27283197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 27293197ebdbSTheodore Ts'o { 27303197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27313197ebdbSTheodore Ts'o s_kobj); 27323197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 27333197ebdbSTheodore Ts'o } 27343197ebdbSTheodore Ts'o 273552cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 27363197ebdbSTheodore Ts'o .show = ext4_attr_show, 27373197ebdbSTheodore Ts'o .store = ext4_attr_store, 27383197ebdbSTheodore Ts'o }; 27393197ebdbSTheodore Ts'o 27403197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 27413197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 27423197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 27433197ebdbSTheodore Ts'o .release = ext4_sb_release, 27443197ebdbSTheodore Ts'o }; 27453197ebdbSTheodore Ts'o 2746857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2747857ac889SLukas Czerner { 2748857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2749857ac889SLukas Czerner } 2750857ac889SLukas Czerner 2751c7f72543SLukas Czerner static ssize_t ext4_feat_show(struct kobject *kobj, 2752c7f72543SLukas Czerner struct attribute *attr, char *buf) 2753c7f72543SLukas Czerner { 2754c7f72543SLukas Czerner return snprintf(buf, PAGE_SIZE, "supported\n"); 2755c7f72543SLukas Czerner } 2756c7f72543SLukas Czerner 2757c7f72543SLukas Czerner /* 2758c7f72543SLukas Czerner * We can not use ext4_attr_show/store because it relies on the kobject 2759c7f72543SLukas Czerner * being embedded in the ext4_sb_info structure which is definitely not 2760c7f72543SLukas Czerner * true in this case. 2761c7f72543SLukas Czerner */ 2762c7f72543SLukas Czerner static const struct sysfs_ops ext4_feat_ops = { 2763c7f72543SLukas Czerner .show = ext4_feat_show, 2764c7f72543SLukas Czerner .store = NULL, 2765c7f72543SLukas Czerner }; 2766c7f72543SLukas Czerner 2767857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2768857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2769c7f72543SLukas Czerner .sysfs_ops = &ext4_feat_ops, 2770857ac889SLukas Czerner .release = ext4_feat_release, 2771857ac889SLukas Czerner }; 2772857ac889SLukas Czerner 2773a13fb1a4SEric Sandeen /* 2774a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2775a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2776a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2777a13fb1a4SEric Sandeen * 0 if it cannot be. 2778a13fb1a4SEric Sandeen */ 2779a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2780a13fb1a4SEric Sandeen { 2781a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2782a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2783a13fb1a4SEric Sandeen "Couldn't mount because of " 2784a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2785a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2786a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2787a13fb1a4SEric Sandeen return 0; 2788a13fb1a4SEric Sandeen } 2789a13fb1a4SEric Sandeen 2790a13fb1a4SEric Sandeen if (readonly) 2791a13fb1a4SEric Sandeen return 1; 2792a13fb1a4SEric Sandeen 2793a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2794a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2795a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2796a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2797a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2798a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2799a13fb1a4SEric Sandeen return 0; 2800a13fb1a4SEric Sandeen } 2801a13fb1a4SEric Sandeen /* 2802a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2803a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2804a13fb1a4SEric Sandeen */ 2805a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2806a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2807a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2808a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2809a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2810a13fb1a4SEric Sandeen return 0; 2811a13fb1a4SEric Sandeen } 2812a13fb1a4SEric Sandeen } 2813bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2814bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2815bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2816bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2817bab08ab9STheodore Ts'o "extents feature\n"); 2818bab08ab9STheodore Ts'o return 0; 2819bab08ab9STheodore Ts'o } 28207c319d32SAditya Kali 28217c319d32SAditya Kali #ifndef CONFIG_QUOTA 28227c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 28237c319d32SAditya Kali !readonly) { 28247c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28257c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28267c319d32SAditya Kali "without CONFIG_QUOTA"); 28277c319d32SAditya Kali return 0; 28287c319d32SAditya Kali } 28297c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2830a13fb1a4SEric Sandeen return 1; 2831a13fb1a4SEric Sandeen } 2832a13fb1a4SEric Sandeen 283366e61a9eSTheodore Ts'o /* 283466e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 283566e61a9eSTheodore Ts'o * on the file system 283666e61a9eSTheodore Ts'o */ 283766e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 283866e61a9eSTheodore Ts'o { 283966e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 284066e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 284166e61a9eSTheodore Ts'o struct ext4_super_block *es; 284266e61a9eSTheodore Ts'o 284366e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 284466e61a9eSTheodore Ts'o es = sbi->s_es; 284566e61a9eSTheodore Ts'o 284666e61a9eSTheodore Ts'o if (es->s_error_count) 2847ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2848ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 284966e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 285066e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2851ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 285266e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 285366e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 285466e61a9eSTheodore Ts'o es->s_first_error_func, 285566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 285666e61a9eSTheodore Ts'o if (es->s_first_error_ino) 285766e61a9eSTheodore Ts'o printk(": inode %u", 285866e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 285966e61a9eSTheodore Ts'o if (es->s_first_error_block) 286066e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 286166e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 286266e61a9eSTheodore Ts'o printk("\n"); 286366e61a9eSTheodore Ts'o } 286466e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2865ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 286666e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 286766e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 286866e61a9eSTheodore Ts'o es->s_last_error_func, 286966e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 287066e61a9eSTheodore Ts'o if (es->s_last_error_ino) 287166e61a9eSTheodore Ts'o printk(": inode %u", 287266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 287366e61a9eSTheodore Ts'o if (es->s_last_error_block) 287466e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 287566e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 287666e61a9eSTheodore Ts'o printk("\n"); 287766e61a9eSTheodore Ts'o } 287866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 287966e61a9eSTheodore Ts'o } 288066e61a9eSTheodore Ts'o 2881bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2882bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2883bfff6873SLukas Czerner { 2884bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2885bfff6873SLukas Czerner ext4_group_t group, ngroups; 2886bfff6873SLukas Czerner struct super_block *sb; 2887bfff6873SLukas Czerner unsigned long timeout = 0; 2888bfff6873SLukas Czerner int ret = 0; 2889bfff6873SLukas Czerner 2890bfff6873SLukas Czerner sb = elr->lr_super; 2891bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2892bfff6873SLukas Czerner 28938e8ad8a5SJan Kara sb_start_write(sb); 2894bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2895bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2896bfff6873SLukas Czerner if (!gdp) { 2897bfff6873SLukas Czerner ret = 1; 2898bfff6873SLukas Czerner break; 2899bfff6873SLukas Czerner } 2900bfff6873SLukas Czerner 2901bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2902bfff6873SLukas Czerner break; 2903bfff6873SLukas Czerner } 2904bfff6873SLukas Czerner 29057f511862STheodore Ts'o if (group >= ngroups) 2906bfff6873SLukas Czerner ret = 1; 2907bfff6873SLukas Czerner 2908bfff6873SLukas Czerner if (!ret) { 2909bfff6873SLukas Czerner timeout = jiffies; 2910bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2911bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2912bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 291351ce6511SLukas Czerner timeout = (jiffies - timeout) * 291451ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2915bfff6873SLukas Czerner elr->lr_timeout = timeout; 2916bfff6873SLukas Czerner } 2917bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2918bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2919bfff6873SLukas Czerner } 29208e8ad8a5SJan Kara sb_end_write(sb); 2921bfff6873SLukas Czerner 2922bfff6873SLukas Czerner return ret; 2923bfff6873SLukas Czerner } 2924bfff6873SLukas Czerner 2925bfff6873SLukas Czerner /* 2926bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29274ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2928bfff6873SLukas Czerner */ 2929bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2930bfff6873SLukas Czerner { 2931bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2932bfff6873SLukas Czerner 2933bfff6873SLukas Czerner if (!elr) 2934bfff6873SLukas Czerner return; 2935bfff6873SLukas Czerner 2936bfff6873SLukas Czerner sbi = elr->lr_sbi; 2937bfff6873SLukas Czerner 2938bfff6873SLukas Czerner list_del(&elr->lr_request); 2939bfff6873SLukas Czerner sbi->s_li_request = NULL; 2940bfff6873SLukas Czerner kfree(elr); 2941bfff6873SLukas Czerner } 2942bfff6873SLukas Czerner 2943bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2944bfff6873SLukas Czerner { 29451bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29461bb933fbSLukas Czerner if (!ext4_li_info) { 29471bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2948bfff6873SLukas Czerner return; 29491bb933fbSLukas Czerner } 2950bfff6873SLukas Czerner 2951bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29521bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2953bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29541bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2955bfff6873SLukas Czerner } 2956bfff6873SLukas Czerner 29578f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29588f1f7453SEric Sandeen 2959bfff6873SLukas Czerner /* 2960bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2961bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2962bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2963bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2964bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2965bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2966bfff6873SLukas Czerner * next waking time and put itself into sleep. 2967bfff6873SLukas Czerner */ 2968bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2969bfff6873SLukas Czerner { 2970bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2971bfff6873SLukas Czerner struct list_head *pos, *n; 2972bfff6873SLukas Czerner struct ext4_li_request *elr; 29734ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2974bfff6873SLukas Czerner 2975bfff6873SLukas Czerner BUG_ON(NULL == eli); 2976bfff6873SLukas Czerner 2977bfff6873SLukas Czerner cont_thread: 2978bfff6873SLukas Czerner while (true) { 2979bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2980bfff6873SLukas Czerner 2981bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2982bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2983bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2984bfff6873SLukas Czerner goto exit_thread; 2985bfff6873SLukas Czerner } 2986bfff6873SLukas Czerner 2987bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2988bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2989bfff6873SLukas Czerner lr_request); 2990bfff6873SLukas Czerner 2991b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2992b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2993b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2994bfff6873SLukas Czerner ext4_remove_li_request(elr); 2995bfff6873SLukas Czerner continue; 2996bfff6873SLukas Czerner } 2997b2c78cd0STheodore Ts'o } 2998bfff6873SLukas Czerner 2999bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3000bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3001bfff6873SLukas Czerner } 3002bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3003bfff6873SLukas Czerner 3004a0acae0eSTejun Heo try_to_freeze(); 3005bfff6873SLukas Czerner 30064ed5c033SLukas Czerner cur = jiffies; 30074ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3008f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3009bfff6873SLukas Czerner cond_resched(); 3010bfff6873SLukas Czerner continue; 3011bfff6873SLukas Czerner } 3012bfff6873SLukas Czerner 30134ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 30144ed5c033SLukas Czerner 30158f1f7453SEric Sandeen if (kthread_should_stop()) { 30168f1f7453SEric Sandeen ext4_clear_request_list(); 30178f1f7453SEric Sandeen goto exit_thread; 30188f1f7453SEric Sandeen } 3019bfff6873SLukas Czerner } 3020bfff6873SLukas Czerner 3021bfff6873SLukas Czerner exit_thread: 3022bfff6873SLukas Czerner /* 3023bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3024bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3025bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3026bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3027bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3028bfff6873SLukas Czerner * new one. 3029bfff6873SLukas Czerner */ 3030bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3031bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3032bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3033bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3034bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3035bfff6873SLukas Czerner goto cont_thread; 3036bfff6873SLukas Czerner } 3037bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3038bfff6873SLukas Czerner kfree(ext4_li_info); 3039bfff6873SLukas Czerner ext4_li_info = NULL; 3040bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3041bfff6873SLukas Czerner 3042bfff6873SLukas Czerner return 0; 3043bfff6873SLukas Czerner } 3044bfff6873SLukas Czerner 3045bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3046bfff6873SLukas Czerner { 3047bfff6873SLukas Czerner struct list_head *pos, *n; 3048bfff6873SLukas Czerner struct ext4_li_request *elr; 3049bfff6873SLukas Czerner 3050bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3051bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3052bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3053bfff6873SLukas Czerner lr_request); 3054bfff6873SLukas Czerner ext4_remove_li_request(elr); 3055bfff6873SLukas Czerner } 3056bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3057bfff6873SLukas Czerner } 3058bfff6873SLukas Czerner 3059bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3060bfff6873SLukas Czerner { 30618f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30628f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30638f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30648f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3065bfff6873SLukas Czerner ext4_clear_request_list(); 3066bfff6873SLukas Czerner kfree(ext4_li_info); 3067bfff6873SLukas Czerner ext4_li_info = NULL; 306892b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3069bfff6873SLukas Czerner "initialization thread\n", 3070bfff6873SLukas Czerner err); 3071bfff6873SLukas Czerner return err; 3072bfff6873SLukas Czerner } 3073bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3074bfff6873SLukas Czerner return 0; 3075bfff6873SLukas Czerner } 3076bfff6873SLukas Czerner 3077bfff6873SLukas Czerner /* 3078bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3079bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3080bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3081bfff6873SLukas Czerner * groups and return total number of groups. 3082bfff6873SLukas Czerner */ 3083bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3084bfff6873SLukas Czerner { 3085bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3086bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3087bfff6873SLukas Czerner 3088bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3089bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3090bfff6873SLukas Czerner if (!gdp) 3091bfff6873SLukas Czerner continue; 3092bfff6873SLukas Czerner 3093bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3094bfff6873SLukas Czerner break; 3095bfff6873SLukas Czerner } 3096bfff6873SLukas Czerner 3097bfff6873SLukas Czerner return group; 3098bfff6873SLukas Czerner } 3099bfff6873SLukas Czerner 3100bfff6873SLukas Czerner static int ext4_li_info_new(void) 3101bfff6873SLukas Czerner { 3102bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3103bfff6873SLukas Czerner 3104bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3105bfff6873SLukas Czerner if (!eli) 3106bfff6873SLukas Czerner return -ENOMEM; 3107bfff6873SLukas Czerner 3108bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3109bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3110bfff6873SLukas Czerner 3111bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3112bfff6873SLukas Czerner 3113bfff6873SLukas Czerner ext4_li_info = eli; 3114bfff6873SLukas Czerner 3115bfff6873SLukas Czerner return 0; 3116bfff6873SLukas Czerner } 3117bfff6873SLukas Czerner 3118bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3119bfff6873SLukas Czerner ext4_group_t start) 3120bfff6873SLukas Czerner { 3121bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3122bfff6873SLukas Czerner struct ext4_li_request *elr; 3123bfff6873SLukas Czerner 3124bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3125bfff6873SLukas Czerner if (!elr) 3126bfff6873SLukas Czerner return NULL; 3127bfff6873SLukas Czerner 3128bfff6873SLukas Czerner elr->lr_super = sb; 3129bfff6873SLukas Czerner elr->lr_sbi = sbi; 3130bfff6873SLukas Czerner elr->lr_next_group = start; 3131bfff6873SLukas Czerner 3132bfff6873SLukas Czerner /* 3133bfff6873SLukas Czerner * Randomize first schedule time of the request to 3134bfff6873SLukas Czerner * spread the inode table initialization requests 3135bfff6873SLukas Czerner * better. 3136bfff6873SLukas Czerner */ 3137dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3138dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3139bfff6873SLukas Czerner return elr; 3140bfff6873SLukas Czerner } 3141bfff6873SLukas Czerner 31427f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3143bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3144bfff6873SLukas Czerner { 3145bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31467f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3147bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 31486c5a6cb9SAndrew Morton int ret = 0; 3149bfff6873SLukas Czerner 31507f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 315151ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 315251ce6511SLukas Czerner /* 315351ce6511SLukas Czerner * Reset timeout so it can be computed again, because 315451ce6511SLukas Czerner * s_li_wait_mult might have changed. 315551ce6511SLukas Czerner */ 315651ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31577f511862STheodore Ts'o goto out; 315851ce6511SLukas Czerner } 3159bfff6873SLukas Czerner 3160bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3161bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 316255ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31637f511862STheodore Ts'o goto out; 3164bfff6873SLukas Czerner 3165bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31667f511862STheodore Ts'o if (!elr) { 31677f511862STheodore Ts'o ret = -ENOMEM; 31687f511862STheodore Ts'o goto out; 31697f511862STheodore Ts'o } 3170bfff6873SLukas Czerner 3171bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3172bfff6873SLukas Czerner ret = ext4_li_info_new(); 3173bfff6873SLukas Czerner if (ret) 3174bfff6873SLukas Czerner goto out; 3175bfff6873SLukas Czerner } 3176bfff6873SLukas Czerner 3177bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3178bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3179bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3180bfff6873SLukas Czerner 3181bfff6873SLukas Czerner sbi->s_li_request = elr; 318246e4690bSTao Ma /* 318346e4690bSTao Ma * set elr to NULL here since it has been inserted to 318446e4690bSTao Ma * the request_list and the removal and free of it is 318546e4690bSTao Ma * handled by ext4_clear_request_list from now on. 318646e4690bSTao Ma */ 318746e4690bSTao Ma elr = NULL; 3188bfff6873SLukas Czerner 3189bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3190bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3191bfff6873SLukas Czerner if (ret) 3192bfff6873SLukas Czerner goto out; 3193bfff6873SLukas Czerner } 3194bfff6873SLukas Czerner out: 3195bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3196beed5ecbSNicolas Kaiser if (ret) 3197bfff6873SLukas Czerner kfree(elr); 3198bfff6873SLukas Czerner return ret; 3199bfff6873SLukas Czerner } 3200bfff6873SLukas Czerner 3201bfff6873SLukas Czerner /* 3202bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3203bfff6873SLukas Czerner * module unload. 3204bfff6873SLukas Czerner */ 3205bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3206bfff6873SLukas Czerner { 3207bfff6873SLukas Czerner /* 3208bfff6873SLukas Czerner * If thread exited earlier 3209bfff6873SLukas Czerner * there's nothing to be done. 3210bfff6873SLukas Czerner */ 32118f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3212bfff6873SLukas Czerner return; 3213bfff6873SLukas Czerner 32148f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3215bfff6873SLukas Czerner } 3216bfff6873SLukas Czerner 321725ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 321825ed6e8aSDarrick J. Wong { 321925ed6e8aSDarrick J. Wong int ret = 1; 322025ed6e8aSDarrick J. Wong int compat, incompat; 322125ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 322225ed6e8aSDarrick J. Wong 322325ed6e8aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 322425ed6e8aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 3225db9ee220SDarrick J. Wong /* journal checksum v3 */ 322625ed6e8aSDarrick J. Wong compat = 0; 3227db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 322825ed6e8aSDarrick J. Wong } else { 322925ed6e8aSDarrick J. Wong /* journal checksum v1 */ 323025ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 323125ed6e8aSDarrick J. Wong incompat = 0; 323225ed6e8aSDarrick J. Wong } 323325ed6e8aSDarrick J. Wong 3234feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3235feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3236feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3237feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 323825ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 323925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 324025ed6e8aSDarrick J. Wong compat, 0, 324125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 324225ed6e8aSDarrick J. Wong incompat); 324325ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 324425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 324525ed6e8aSDarrick J. Wong compat, 0, 324625ed6e8aSDarrick J. Wong incompat); 324725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 324825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 324925ed6e8aSDarrick J. Wong } else { 3250feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3251feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 325225ed6e8aSDarrick J. Wong } 325325ed6e8aSDarrick J. Wong 325425ed6e8aSDarrick J. Wong return ret; 325525ed6e8aSDarrick J. Wong } 325625ed6e8aSDarrick J. Wong 3257952fc18eSTheodore Ts'o /* 3258952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3259952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3260952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3261952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3262952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3263952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3264952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3265952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3266952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3267952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3268952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3269952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3270952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3271952fc18eSTheodore Ts'o */ 3272952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3273952fc18eSTheodore Ts'o char *buf) 3274952fc18eSTheodore Ts'o { 3275952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3276952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3277952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3278952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3279952fc18eSTheodore Ts'o int s, j, count = 0; 3280952fc18eSTheodore Ts'o 32810548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 32820548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32830548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32840548bbb8STheodore Ts'o 3285952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3286952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3287952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3288952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3289952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3290952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3291952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3292952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3293952fc18eSTheodore Ts'o count++; 3294952fc18eSTheodore Ts'o } 3295952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3296952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3297952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3298952fc18eSTheodore Ts'o count++; 3299952fc18eSTheodore Ts'o } 3300952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3301952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3302952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3303952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3304952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3305952fc18eSTheodore Ts'o count++; 3306952fc18eSTheodore Ts'o } 3307952fc18eSTheodore Ts'o if (i != grp) 3308952fc18eSTheodore Ts'o continue; 3309952fc18eSTheodore Ts'o s = 0; 3310952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3311952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3312952fc18eSTheodore Ts'o count++; 3313952fc18eSTheodore Ts'o } 3314952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3315952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3316952fc18eSTheodore Ts'o count++; 3317952fc18eSTheodore Ts'o } 3318952fc18eSTheodore Ts'o } 3319952fc18eSTheodore Ts'o if (!count) 3320952fc18eSTheodore Ts'o return 0; 3321952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3322952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3323952fc18eSTheodore Ts'o } 3324952fc18eSTheodore Ts'o 3325952fc18eSTheodore Ts'o /* 3326952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3327952fc18eSTheodore Ts'o */ 3328952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3329952fc18eSTheodore Ts'o { 3330952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3331952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3332952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3333952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3334952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3335952fc18eSTheodore Ts'o 3336952fc18eSTheodore Ts'o if (!buf) 3337952fc18eSTheodore Ts'o return -ENOMEM; 3338952fc18eSTheodore Ts'o 3339952fc18eSTheodore Ts'o /* 3340952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3341952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3342952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3343952fc18eSTheodore Ts'o */ 3344952fc18eSTheodore Ts'o 3345952fc18eSTheodore Ts'o /* 3346952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3347952fc18eSTheodore Ts'o */ 3348952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3349952fc18eSTheodore Ts'o 3350952fc18eSTheodore Ts'o /* 3351952fc18eSTheodore Ts'o * Add the overhead found in each block group 3352952fc18eSTheodore Ts'o */ 3353952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3354952fc18eSTheodore Ts'o int blks; 3355952fc18eSTheodore Ts'o 3356952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3357952fc18eSTheodore Ts'o overhead += blks; 3358952fc18eSTheodore Ts'o if (blks) 3359952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3360952fc18eSTheodore Ts'o cond_resched(); 3361952fc18eSTheodore Ts'o } 33620875a2b4SEric Sandeen /* Add the journal blocks as well */ 33630875a2b4SEric Sandeen if (sbi->s_journal) 3364810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33650875a2b4SEric Sandeen 3366952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3367952fc18eSTheodore Ts'o smp_wmb(); 3368952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3369952fc18eSTheodore Ts'o return 0; 3370952fc18eSTheodore Ts'o } 3371952fc18eSTheodore Ts'o 337227dd4385SLukas Czerner 337330fac0f7SJan Kara static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) 337427dd4385SLukas Czerner { 337527dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 337627dd4385SLukas Czerner 337727dd4385SLukas Czerner /* 337830fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 337930fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 338030fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 338130fac0f7SJan Kara * to keep ext2/3 backward compatibility. 338230fac0f7SJan Kara */ 338330fac0f7SJan Kara if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 338430fac0f7SJan Kara return 0; 338530fac0f7SJan Kara /* 338627dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 338727dd4385SLukas Czerner * This should cover the situations where we can not afford to run 338827dd4385SLukas Czerner * out of space like for example punch hole, or converting 3389556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 339027dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 339127dd4385SLukas Czerner * very rare. 339227dd4385SLukas Czerner */ 339330fac0f7SJan Kara resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> 339430fac0f7SJan Kara EXT4_SB(sb)->s_cluster_bits; 339527dd4385SLukas Czerner 339627dd4385SLukas Czerner do_div(resv_clusters, 50); 339727dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 339827dd4385SLukas Czerner 339927dd4385SLukas Czerner return resv_clusters; 340027dd4385SLukas Czerner } 340127dd4385SLukas Czerner 340227dd4385SLukas Czerner 340327dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) 340427dd4385SLukas Czerner { 340527dd4385SLukas Czerner ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> 340627dd4385SLukas Czerner sbi->s_cluster_bits; 340727dd4385SLukas Czerner 340827dd4385SLukas Czerner if (count >= clusters) 340927dd4385SLukas Czerner return -EINVAL; 341027dd4385SLukas Czerner 341127dd4385SLukas Czerner atomic64_set(&sbi->s_resv_clusters, count); 341227dd4385SLukas Czerner return 0; 341327dd4385SLukas Czerner } 341427dd4385SLukas Czerner 3415617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3416ac27a0ecSDave Kleikamp { 3417d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3418ac27a0ecSDave Kleikamp struct buffer_head *bh; 3419617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3420617ba13bSMingming Cao struct ext4_sb_info *sbi; 3421617ba13bSMingming Cao ext4_fsblk_t block; 3422617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 342370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3424ac27a0ecSDave Kleikamp unsigned long offset = 0; 3425ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3426ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3427ac27a0ecSDave Kleikamp struct inode *root; 34289f6200bbSTheodore Ts'o char *cp; 34290390131bSFrank Mayhar const char *descr; 3430dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3431281b5995STheodore Ts'o int blocksize, clustersize; 34324ec11028STheodore Ts'o unsigned int db_count; 34334ec11028STheodore Ts'o unsigned int i; 3434281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3435bd81d8eeSLaurent Vivier __u64 blocks_count; 343607aa2ea1SLukas Czerner int err = 0; 3437b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3438bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3439ac27a0ecSDave Kleikamp 3440ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3441ac27a0ecSDave Kleikamp if (!sbi) 3442dcc7dae3SCyrill Gorcunov goto out_free_orig; 3443705895b6SPekka Enberg 3444705895b6SPekka Enberg sbi->s_blockgroup_lock = 3445705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3446705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3447705895b6SPekka Enberg kfree(sbi); 3448dcc7dae3SCyrill Gorcunov goto out_free_orig; 3449705895b6SPekka Enberg } 3450ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34512c0544b2STheodore Ts'o sbi->s_sb = sb; 3452240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3453d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3454f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3455f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3456f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3457ac27a0ecSDave Kleikamp 34589f6200bbSTheodore Ts'o /* Cleanup superblock name */ 34599f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 34609f6200bbSTheodore Ts'o *cp = '!'; 34619f6200bbSTheodore Ts'o 346207aa2ea1SLukas Czerner /* -EINVAL is default */ 3463dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3464617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3465ac27a0ecSDave Kleikamp if (!blocksize) { 3466b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3467ac27a0ecSDave Kleikamp goto out_fail; 3468ac27a0ecSDave Kleikamp } 3469ac27a0ecSDave Kleikamp 3470ac27a0ecSDave Kleikamp /* 3471617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3472ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3473ac27a0ecSDave Kleikamp */ 3474617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 347570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 347670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3477ac27a0ecSDave Kleikamp } else { 347870bbb3e0SAndrew Morton logical_sb_block = sb_block; 3479ac27a0ecSDave Kleikamp } 3480ac27a0ecSDave Kleikamp 3481a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3482b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3483ac27a0ecSDave Kleikamp goto out_fail; 3484ac27a0ecSDave Kleikamp } 3485ac27a0ecSDave Kleikamp /* 3486ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3487617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3488ac27a0ecSDave Kleikamp */ 34892716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3490ac27a0ecSDave Kleikamp sbi->s_es = es; 3491ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3492617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3493617ba13bSMingming Cao goto cantfind_ext4; 3494afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3495ac27a0ecSDave Kleikamp 3496feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3497feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3498feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3499feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3500feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3501feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3502feb0ab32SDarrick J. Wong 3503d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3504d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3505d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3506d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3507d25425f8SDarrick J. Wong silent = 1; 3508d25425f8SDarrick J. Wong goto cantfind_ext4; 3509d25425f8SDarrick J. Wong } 3510d25425f8SDarrick J. Wong 35110441984aSDarrick J. Wong /* Load the checksum driver */ 35120441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 35130441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 35140441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 35150441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 35160441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 35170441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 35180441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 35190441984aSDarrick J. Wong goto failed_mount; 35200441984aSDarrick J. Wong } 35210441984aSDarrick J. Wong } 35220441984aSDarrick J. Wong 3523a9c47317SDarrick J. Wong /* Check superblock checksum */ 3524a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3525a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3526a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3527a9c47317SDarrick J. Wong silent = 1; 3528a9c47317SDarrick J. Wong goto cantfind_ext4; 3529a9c47317SDarrick J. Wong } 3530a9c47317SDarrick J. Wong 3531a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3532a9c47317SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3533a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 3534a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3535a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3536a9c47317SDarrick J. Wong 3537ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3538ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3539fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3540617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3541fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 354287f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3543fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3544617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3545fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3546ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3547fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 354803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3549fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35502e7842b8SHugh Dickins #endif 3551617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3552fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3553617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3554fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3555617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3556fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3557ac27a0ecSDave Kleikamp 3558617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3559fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3560bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3561fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3562bb4f397aSAneesh Kumar K.V else 3563fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 356445f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3565fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35668b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3567fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3568ac27a0ecSDave Kleikamp 356908cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 357008cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 357130773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 357230773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 357330773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3574ac27a0ecSDave Kleikamp 35758b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3576fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3577ac27a0ecSDave Kleikamp 35781e2462f9SMingming Cao /* 3579dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3580dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3581dd919b98SAneesh Kumar K.V */ 3582bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35838b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3584fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3585dd919b98SAneesh Kumar K.V 358651ce6511SLukas Czerner /* 358751ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 358851ce6511SLukas Czerner * no mount option specified. 358951ce6511SLukas Czerner */ 359051ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 359151ce6511SLukas Czerner 35928b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3593661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 35948b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35958b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35968b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 35978b67f04aSTheodore Ts'o } 35985a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3599b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3600661aa520SEric Sandeen &journal_ioprio, 0)) 3601ac27a0ecSDave Kleikamp goto failed_mount; 3602ac27a0ecSDave Kleikamp 360356889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 360456889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 360556889787STheodore Ts'o "with data=journal disables delayed " 360656889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 360756889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 360856889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 360956889787STheodore Ts'o "both data=journal and delalloc"); 361056889787STheodore Ts'o goto failed_mount; 361156889787STheodore Ts'o } 361256889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 361356889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 36146ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 361556889787STheodore Ts'o goto failed_mount; 361656889787STheodore Ts'o } 361756889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 361856889787STheodore Ts'o clear_opt(sb, DELALLOC); 361956889787STheodore Ts'o } 362056889787STheodore Ts'o 3621ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3622482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3623ac27a0ecSDave Kleikamp 3624617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3625617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3626617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3627617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3628b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3629b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3630b31e1552SEric Sandeen "running e2fsck is recommended"); 3631469108ffSTheodore Tso 3632ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3633ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3634ed3654ebSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, 3635ed3654ebSTheodore Ts'o EXT4_FEATURE_INCOMPAT_64BIT)) { 3636ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3637ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3638ed3654ebSTheodore Ts'o goto failed_mount; 3639ed3654ebSTheodore Ts'o } 3640ed3654ebSTheodore Ts'o } 3641ed3654ebSTheodore Ts'o 36422035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36432035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36442035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36452035e776STheodore Ts'o "using the ext4 subsystem"); 36462035e776STheodore Ts'o else { 36472035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36482035e776STheodore Ts'o "to feature incompatibilities"); 36492035e776STheodore Ts'o goto failed_mount; 36502035e776STheodore Ts'o } 36512035e776STheodore Ts'o } 36522035e776STheodore Ts'o 36532035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36542035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36552035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36562035e776STheodore Ts'o "using the ext4 subsystem"); 36572035e776STheodore Ts'o else { 36582035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36592035e776STheodore Ts'o "to feature incompatibilities"); 36602035e776STheodore Ts'o goto failed_mount; 36612035e776STheodore Ts'o } 36622035e776STheodore Ts'o } 36632035e776STheodore Ts'o 3664469108ffSTheodore Tso /* 3665ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3666ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3667ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3668ac27a0ecSDave Kleikamp */ 3669a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3670ac27a0ecSDave Kleikamp goto failed_mount; 3671a13fb1a4SEric Sandeen 3672261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3673617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3674617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3675b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3676b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3677ac27a0ecSDave Kleikamp goto failed_mount; 3678ac27a0ecSDave Kleikamp } 3679ac27a0ecSDave Kleikamp 3680ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3681ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3682ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3683b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3684ce40733cSAneesh Kumar K.V blocksize); 3685ac27a0ecSDave Kleikamp goto failed_mount; 3686ac27a0ecSDave Kleikamp } 3687ac27a0ecSDave Kleikamp 3688ac27a0ecSDave Kleikamp brelse(bh); 368970bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 369070bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3691a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3692ac27a0ecSDave Kleikamp if (!bh) { 3693b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3694b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3695ac27a0ecSDave Kleikamp goto failed_mount; 3696ac27a0ecSDave Kleikamp } 36972716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3698ac27a0ecSDave Kleikamp sbi->s_es = es; 3699617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3700b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3701b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3702ac27a0ecSDave Kleikamp goto failed_mount; 3703ac27a0ecSDave Kleikamp } 3704ac27a0ecSDave Kleikamp } 3705ac27a0ecSDave Kleikamp 3706a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3707a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3708f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3709f287a1a5STheodore Ts'o has_huge_files); 3710f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3711ac27a0ecSDave Kleikamp 3712617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3713617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3714617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3715ac27a0ecSDave Kleikamp } else { 3716ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3717ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3718617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 37191330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3720ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3721b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3722b31e1552SEric Sandeen "unsupported inode size: %d", 3723ac27a0ecSDave Kleikamp sbi->s_inode_size); 3724ac27a0ecSDave Kleikamp goto failed_mount; 3725ac27a0ecSDave Kleikamp } 3726ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3727ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3728ac27a0ecSDave Kleikamp } 37290b8e58a1SAndreas Dilger 37300d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 37310d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 37328fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 37330d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3734d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3735b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3736b31e1552SEric Sandeen "unsupported descriptor size %lu", 37370d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37380d1ee42fSAlexandre Ratchov goto failed_mount; 37390d1ee42fSAlexandre Ratchov } 37400d1ee42fSAlexandre Ratchov } else 37410d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37420b8e58a1SAndreas Dilger 3743ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3744ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3745b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3746617ba13bSMingming Cao goto cantfind_ext4; 37470b8e58a1SAndreas Dilger 3748617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3749ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3750617ba13bSMingming Cao goto cantfind_ext4; 3751ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3752ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37530d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3754ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3755ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3756e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3757e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37580b8e58a1SAndreas Dilger 3759ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3760ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3761ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 376223301410STheodore Ts'o if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { 3763f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3764f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3765f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3766f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3767f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 376823301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 376923301410STheodore Ts'o es->s_flags |= 377023301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3771f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3772f99b2589STheodore Ts'o #else 377323301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 377423301410STheodore Ts'o es->s_flags |= 377523301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3776f99b2589STheodore Ts'o #endif 3777f99b2589STheodore Ts'o } 377823301410STheodore Ts'o } 3779ac27a0ecSDave Kleikamp 3780281b5995STheodore Ts'o /* Handle clustersize */ 3781281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3782281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3783281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3784281b5995STheodore Ts'o if (has_bigalloc) { 3785281b5995STheodore Ts'o if (clustersize < blocksize) { 3786281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3787281b5995STheodore Ts'o "cluster size (%d) smaller than " 3788281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3789281b5995STheodore Ts'o goto failed_mount; 3790281b5995STheodore Ts'o } 3791281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3792281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3793281b5995STheodore Ts'o sbi->s_clusters_per_group = 3794281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3795281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3796281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3797281b5995STheodore Ts'o "#clusters per group too big: %lu", 3798281b5995STheodore Ts'o sbi->s_clusters_per_group); 3799281b5995STheodore Ts'o goto failed_mount; 3800281b5995STheodore Ts'o } 3801281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3802281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3803281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3804281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3805281b5995STheodore Ts'o sbi->s_blocks_per_group, 3806281b5995STheodore Ts'o sbi->s_clusters_per_group); 3807281b5995STheodore Ts'o goto failed_mount; 3808281b5995STheodore Ts'o } 3809281b5995STheodore Ts'o } else { 3810281b5995STheodore Ts'o if (clustersize != blocksize) { 3811281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3812281b5995STheodore Ts'o "block size (%d)", clustersize, 3813281b5995STheodore Ts'o blocksize); 3814281b5995STheodore Ts'o clustersize = blocksize; 3815281b5995STheodore Ts'o } 3816ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3817b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3818b31e1552SEric Sandeen "#blocks per group too big: %lu", 3819ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3820ac27a0ecSDave Kleikamp goto failed_mount; 3821ac27a0ecSDave Kleikamp } 3822281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3823281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3824281b5995STheodore Ts'o } 3825281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3826281b5995STheodore Ts'o 3827ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3828b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3829b31e1552SEric Sandeen "#inodes per group too big: %lu", 3830ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3831ac27a0ecSDave Kleikamp goto failed_mount; 3832ac27a0ecSDave Kleikamp } 3833ac27a0ecSDave Kleikamp 3834960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3835960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3836960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3837960fd856STheodore Ts'o 3838bf43d84bSEric Sandeen /* 3839bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3840bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3841bf43d84bSEric Sandeen */ 38425a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 384330ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38445a9ae68aSDarrick J. Wong if (err) { 3845b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3846bf43d84bSEric Sandeen " too large to mount safely on this system"); 3847ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 384890c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3849ac27a0ecSDave Kleikamp goto failed_mount; 3850ac27a0ecSDave Kleikamp } 3851ac27a0ecSDave Kleikamp 3852617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3853617ba13bSMingming Cao goto cantfind_ext4; 3854e7c95593SEric Sandeen 38550f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38560f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38570f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3858b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3859b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38600f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38610f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38620f2ddca6SFrom: Thiemo Nagel } 38630f2ddca6SFrom: Thiemo Nagel 38644ec11028STheodore Ts'o /* 38654ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38664ec11028STheodore Ts'o * of the filesystem. 38674ec11028STheodore Ts'o */ 38684ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3869b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3870b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3871e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38724ec11028STheodore Ts'o ext4_blocks_count(es)); 3873e7c95593SEric Sandeen goto failed_mount; 3874e7c95593SEric Sandeen } 3875bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3876bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3877bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3878bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 38794ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3880b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 38814ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3882b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 38834ec11028STheodore Ts'o ext4_blocks_count(es), 38844ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 38854ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 38864ec11028STheodore Ts'o goto failed_mount; 38874ec11028STheodore Ts'o } 3888bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3889fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3890fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3891617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3892617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3893f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3894f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3895ac27a0ecSDave Kleikamp GFP_KERNEL); 3896ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3897b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 38982cde417dSTheodore Ts'o ret = -ENOMEM; 3899ac27a0ecSDave Kleikamp goto failed_mount; 3900ac27a0ecSDave Kleikamp } 3901ac27a0ecSDave Kleikamp 39029f6200bbSTheodore Ts'o if (ext4_proc_root) 39039f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3904240799cdSTheodore Ts'o 390566acdcf4STheodore Ts'o if (sbi->s_proc) 390666acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 390766acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 390866acdcf4STheodore Ts'o 3909705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3910ac27a0ecSDave Kleikamp 3911ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 391270bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3913a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3914ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3915b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3916b31e1552SEric Sandeen "can't read group descriptor %d", i); 3917ac27a0ecSDave Kleikamp db_count = i; 3918ac27a0ecSDave Kleikamp goto failed_mount2; 3919ac27a0ecSDave Kleikamp } 3920ac27a0ecSDave Kleikamp } 3921bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3922b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3923f9ae9cf5STheodore Ts'o goto failed_mount2; 3924ac27a0ecSDave Kleikamp } 3925772cb7c8SJose R. Santos 3926f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3927ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3928ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3929ac27a0ecSDave Kleikamp 393004496411STao Ma init_timer(&sbi->s_err_report); 393104496411STao Ma sbi->s_err_report.function = print_daily_error_info; 393204496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 393304496411STao Ma 3934a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3935eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3936ce7e010aSTheodore Ts'o goto failed_mount3; 3937ce7e010aSTheodore Ts'o 3938c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 393967a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3940c9de560dSAlex Tomas 3941f9ae9cf5STheodore Ts'o /* 3942f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3943f9ae9cf5STheodore Ts'o */ 3944f9ae9cf5STheodore Ts'o if (!test_opt(sb, NOLOAD) && 3945f9ae9cf5STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3946f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3947f9ae9cf5STheodore Ts'o else 3948f9ae9cf5STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3949617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3950617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3951ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3952617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3953262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 39547c319d32SAditya Kali sb->s_qcop = &ext4_qctl_sysfile_operations; 3955262b4662SJan Kara else 3956262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3957ac27a0ecSDave Kleikamp #endif 3958f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3959f2fa2ffcSAneesh Kumar K.V 3960ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39613b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3962ac27a0ecSDave Kleikamp 3963ac27a0ecSDave Kleikamp sb->s_root = NULL; 3964ac27a0ecSDave Kleikamp 3965ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3966617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3967617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3968ac27a0ecSDave Kleikamp 3969c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3970c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3971c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3972c5e06d10SJohann Lombardi goto failed_mount3; 3973c5e06d10SJohann Lombardi 3974ac27a0ecSDave Kleikamp /* 3975ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3976ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3977ac27a0ecSDave Kleikamp */ 3978ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3979617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3980617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3981ac27a0ecSDave Kleikamp goto failed_mount3; 39820390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 39830390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3984b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3985b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3986744692dcSJiaying Zhang goto failed_mount_wq; 3987ac27a0ecSDave Kleikamp } else { 3988fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 39890390131bSFrank Mayhar sbi->s_journal = NULL; 39900390131bSFrank Mayhar needs_recovery = 0; 39910390131bSFrank Mayhar goto no_journal; 3992ac27a0ecSDave Kleikamp } 3993ac27a0ecSDave Kleikamp 3994f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3995eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3996eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3997b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3998744692dcSJiaying Zhang goto failed_mount_wq; 3999eb40a09cSJose R. Santos } 4000eb40a09cSJose R. Santos 400125ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 400225ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 400325ed6e8aSDarrick J. Wong "feature set"); 400425ed6e8aSDarrick J. Wong goto failed_mount_wq; 4005d4da6c9cSLinus Torvalds } 4006818d276cSGirish Shilamkar 4007ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4008ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4009ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4010ac27a0ecSDave Kleikamp case 0: 4011ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 401263f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 401363f57933SAndrew Morton * cope, else JOURNAL_DATA 401463f57933SAndrew Morton */ 4015dab291afSMingming Cao if (jbd2_journal_check_available_features 4016dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 4017fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4018ac27a0ecSDave Kleikamp else 4019fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4020ac27a0ecSDave Kleikamp break; 4021ac27a0ecSDave Kleikamp 4022617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4023617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4024dab291afSMingming Cao if (!jbd2_journal_check_available_features 4025dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4026b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4027b31e1552SEric Sandeen "requested data journaling mode"); 4028744692dcSJiaying Zhang goto failed_mount_wq; 4029ac27a0ecSDave Kleikamp } 4030ac27a0ecSDave Kleikamp default: 4031ac27a0ecSDave Kleikamp break; 4032ac27a0ecSDave Kleikamp } 4033b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4034ac27a0ecSDave Kleikamp 403518aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 403618aadd47SBobi Jam 4037ce7e010aSTheodore Ts'o no_journal: 40389c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 40399c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 40409c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40419c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40429c191f70ST Makphaibulchoke goto failed_mount_wq; 40439c191f70ST Makphaibulchoke } 40449c191f70ST Makphaibulchoke } 40459c191f70ST Makphaibulchoke 4046fd89d5f2STejun Heo /* 4047952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4048952fc18eSTheodore Ts'o * superblock if present. 4049952fc18eSTheodore Ts'o */ 4050952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4051952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4052952fc18eSTheodore Ts'o else { 405307aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 405407aa2ea1SLukas Czerner if (err) 4055952fc18eSTheodore Ts'o goto failed_mount_wq; 4056952fc18eSTheodore Ts'o } 4057952fc18eSTheodore Ts'o 4058952fc18eSTheodore Ts'o /* 4059fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4060fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4061fd89d5f2STejun Heo */ 40622e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40632e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40642e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40652e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 406607aa2ea1SLukas Czerner ret = -ENOMEM; 40672e8fa54eSJan Kara goto failed_mount4; 40682e8fa54eSJan Kara } 40692e8fa54eSJan Kara 4070ac27a0ecSDave Kleikamp /* 4071dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4072ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4073ac27a0ecSDave Kleikamp */ 4074ac27a0ecSDave Kleikamp 40751d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 40761d1fe1eeSDavid Howells if (IS_ERR(root)) { 4077b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 40781d1fe1eeSDavid Howells ret = PTR_ERR(root); 407932a9bb57SManish Katiyar root = NULL; 4080ac27a0ecSDave Kleikamp goto failed_mount4; 4081ac27a0ecSDave Kleikamp } 4082ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4083b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 408494bf608aSAl Viro iput(root); 4085ac27a0ecSDave Kleikamp goto failed_mount4; 4086ac27a0ecSDave Kleikamp } 408748fde701SAl Viro sb->s_root = d_make_root(root); 40881d1fe1eeSDavid Howells if (!sb->s_root) { 4089b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 40901d1fe1eeSDavid Howells ret = -ENOMEM; 40911d1fe1eeSDavid Howells goto failed_mount4; 40921d1fe1eeSDavid Howells } 4093ac27a0ecSDave Kleikamp 40947e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 40957e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4096ef7f3835SKalpak Shah 4097ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4098ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 4099ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4100ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4101ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 4102ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 4103ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4104ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4105ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4106ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4107ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4108ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4109ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4110ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4111ef7f3835SKalpak Shah } 4112ef7f3835SKalpak Shah } 4113ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4114ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4115ef7f3835SKalpak Shah sbi->s_inode_size) { 4116ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4117ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4118b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4119b31e1552SEric Sandeen "available"); 4120ef7f3835SKalpak Shah } 4121ef7f3835SKalpak Shah 412230fac0f7SJan Kara err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); 412327dd4385SLukas Czerner if (err) { 412427dd4385SLukas Czerner ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " 412530fac0f7SJan Kara "reserved pool", ext4_calculate_resv_clusters(sb)); 4126f9ae9cf5STheodore Ts'o goto failed_mount4a; 412727dd4385SLukas Czerner } 412827dd4385SLukas Czerner 41296fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 41306fd058f7STheodore Ts'o if (err) { 4131b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4132fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4133f9ae9cf5STheodore Ts'o goto failed_mount4a; 4134f9ae9cf5STheodore Ts'o } 4135f9ae9cf5STheodore Ts'o 4136f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4137f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4138f9ae9cf5STheodore Ts'o if (err) { 4139f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4140f9ae9cf5STheodore Ts'o err); 4141dcf2d804STao Ma goto failed_mount5; 4142c2774d84SAneesh Kumar K.V } 4143c2774d84SAneesh Kumar K.V 4144d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4145d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4146d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4147d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, block); 4148d5e03cbbSTheodore Ts'o if (!err) { 4149d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4150d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4151d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, freei); 4152d5e03cbbSTheodore Ts'o } 4153d5e03cbbSTheodore Ts'o if (!err) 4154d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4155d5e03cbbSTheodore Ts'o ext4_count_dirs(sb)); 4156d5e03cbbSTheodore Ts'o if (!err) 4157d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 4158d5e03cbbSTheodore Ts'o if (err) { 4159d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4160d5e03cbbSTheodore Ts'o goto failed_mount6; 4161d5e03cbbSTheodore Ts'o } 4162d5e03cbbSTheodore Ts'o 4163d5e03cbbSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 4164d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4165d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4166d5e03cbbSTheodore Ts'o "unable to initialize " 4167d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4168d5e03cbbSTheodore Ts'o goto failed_mount6; 4169d5e03cbbSTheodore Ts'o } 4170d5e03cbbSTheodore Ts'o 4171bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4172bfff6873SLukas Czerner if (err) 4173dcf2d804STao Ma goto failed_mount6; 4174bfff6873SLukas Czerner 41753197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 41763197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 41773197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 41783197ebdbSTheodore Ts'o "%s", sb->s_id); 4179dcf2d804STao Ma if (err) 4180dcf2d804STao Ma goto failed_mount7; 41813197ebdbSTheodore Ts'o 41829b2ff357SJan Kara #ifdef CONFIG_QUOTA 41839b2ff357SJan Kara /* Enable quota usage during mount. */ 41849b2ff357SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 41859b2ff357SJan Kara !(sb->s_flags & MS_RDONLY)) { 41869b2ff357SJan Kara err = ext4_enable_quotas(sb); 41879b2ff357SJan Kara if (err) 41889b2ff357SJan Kara goto failed_mount8; 41899b2ff357SJan Kara } 41909b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 41919b2ff357SJan Kara 4192617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4193617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4194617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 41950390131bSFrank Mayhar if (needs_recovery) { 4196b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4197617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 41980390131bSFrank Mayhar } 41990390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 42000390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 42010390131bSFrank Mayhar descr = " journalled data mode"; 42020390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 42030390131bSFrank Mayhar descr = " ordered data mode"; 42040390131bSFrank Mayhar else 42050390131bSFrank Mayhar descr = " writeback data mode"; 42060390131bSFrank Mayhar } else 42070390131bSFrank Mayhar descr = "out journal"; 42080390131bSFrank Mayhar 420979add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 421079add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 421179add3a3SLukas Czerner if (!blk_queue_discard(q)) 421279add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 421379add3a3SLukas Czerner "mounting with \"discard\" option, but " 421479add3a3SLukas Czerner "the device does not support discard"); 421579add3a3SLukas Czerner } 421679add3a3SLukas Czerner 4217d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 42188b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 42198b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4220ac27a0ecSDave Kleikamp 422166e61a9eSTheodore Ts'o if (es->s_error_count) 422266e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4223ac27a0ecSDave Kleikamp 4224efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4225efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4226efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4227efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4228efbed4dcSTheodore Ts'o 4229d4c402d9SCurt Wohlgemuth kfree(orig_data); 4230ac27a0ecSDave Kleikamp return 0; 4231ac27a0ecSDave Kleikamp 4232617ba13bSMingming Cao cantfind_ext4: 4233ac27a0ecSDave Kleikamp if (!silent) 4234b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4235ac27a0ecSDave Kleikamp goto failed_mount; 4236ac27a0ecSDave Kleikamp 423772ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 423872ba7450STheodore Ts'o failed_mount8: 423972ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 424072ba7450STheodore Ts'o #endif 4241dcf2d804STao Ma failed_mount7: 4242dcf2d804STao Ma ext4_unregister_li_request(sb); 4243dcf2d804STao Ma failed_mount6: 4244f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4245d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4246d5e03cbbSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 4247d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4248d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4249d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4250d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 425100764937SAzat Khuzhin failed_mount5: 4252f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4253f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4254f9ae9cf5STheodore Ts'o failed_mount4a: 425594bf608aSAl Viro dput(sb->s_root); 425632a9bb57SManish Katiyar sb->s_root = NULL; 425794bf608aSAl Viro failed_mount4: 4258b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 42592e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 42602e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 42614c0425ffSMingming Cao failed_mount_wq: 42620390131bSFrank Mayhar if (sbi->s_journal) { 4263dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 426447b4a50bSJan Kara sbi->s_journal = NULL; 42650390131bSFrank Mayhar } 4266d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4267eb68d0e2SZheng Liu failed_mount3: 42689105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4269c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4270c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4271ac27a0ecSDave Kleikamp failed_mount2: 4272ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4273ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4274f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4275ac27a0ecSDave Kleikamp failed_mount: 42760441984aSDarrick J. Wong if (sbi->s_chksum_driver) 42770441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4278240799cdSTheodore Ts'o if (sbi->s_proc) { 427966acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 42809f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4281240799cdSTheodore Ts'o } 4282ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4283a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4284ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4285ac27a0ecSDave Kleikamp #endif 4286617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4287ac27a0ecSDave Kleikamp brelse(bh); 4288ac27a0ecSDave Kleikamp out_fail: 4289ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4290f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4291ac27a0ecSDave Kleikamp kfree(sbi); 4292dcc7dae3SCyrill Gorcunov out_free_orig: 4293d4c402d9SCurt Wohlgemuth kfree(orig_data); 429407aa2ea1SLukas Czerner return err ? err : ret; 4295ac27a0ecSDave Kleikamp } 4296ac27a0ecSDave Kleikamp 4297ac27a0ecSDave Kleikamp /* 4298ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4299ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4300ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4301ac27a0ecSDave Kleikamp */ 4302617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4303ac27a0ecSDave Kleikamp { 4304617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4305ac27a0ecSDave Kleikamp 4306ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 430730773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 430830773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4309ac27a0ecSDave Kleikamp 4310a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4311ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4312dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4313ac27a0ecSDave Kleikamp else 4314dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 43155bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 43165bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 43175bf5683aSHidehiro Kawai else 43185bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4319a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4320ac27a0ecSDave Kleikamp } 4321ac27a0ecSDave Kleikamp 4322617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4323ac27a0ecSDave Kleikamp unsigned int journal_inum) 4324ac27a0ecSDave Kleikamp { 4325ac27a0ecSDave Kleikamp struct inode *journal_inode; 4326ac27a0ecSDave Kleikamp journal_t *journal; 4327ac27a0ecSDave Kleikamp 43280390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43290390131bSFrank Mayhar 4330ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4331ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4332ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4333ac27a0ecSDave Kleikamp 43341d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43351d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4336b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4337ac27a0ecSDave Kleikamp return NULL; 4338ac27a0ecSDave Kleikamp } 4339ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4340ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4341ac27a0ecSDave Kleikamp iput(journal_inode); 4342b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4343ac27a0ecSDave Kleikamp return NULL; 4344ac27a0ecSDave Kleikamp } 4345ac27a0ecSDave Kleikamp 4346e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4347ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 43481d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4349b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4350ac27a0ecSDave Kleikamp iput(journal_inode); 4351ac27a0ecSDave Kleikamp return NULL; 4352ac27a0ecSDave Kleikamp } 4353ac27a0ecSDave Kleikamp 4354dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4355ac27a0ecSDave Kleikamp if (!journal) { 4356b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4357ac27a0ecSDave Kleikamp iput(journal_inode); 4358ac27a0ecSDave Kleikamp return NULL; 4359ac27a0ecSDave Kleikamp } 4360ac27a0ecSDave Kleikamp journal->j_private = sb; 4361617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4362ac27a0ecSDave Kleikamp return journal; 4363ac27a0ecSDave Kleikamp } 4364ac27a0ecSDave Kleikamp 4365617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4366ac27a0ecSDave Kleikamp dev_t j_dev) 4367ac27a0ecSDave Kleikamp { 4368ac27a0ecSDave Kleikamp struct buffer_head *bh; 4369ac27a0ecSDave Kleikamp journal_t *journal; 4370617ba13bSMingming Cao ext4_fsblk_t start; 4371617ba13bSMingming Cao ext4_fsblk_t len; 4372ac27a0ecSDave Kleikamp int hblock, blocksize; 4373617ba13bSMingming Cao ext4_fsblk_t sb_block; 4374ac27a0ecSDave Kleikamp unsigned long offset; 4375617ba13bSMingming Cao struct ext4_super_block *es; 4376ac27a0ecSDave Kleikamp struct block_device *bdev; 4377ac27a0ecSDave Kleikamp 43780390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43790390131bSFrank Mayhar 4380b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4381ac27a0ecSDave Kleikamp if (bdev == NULL) 4382ac27a0ecSDave Kleikamp return NULL; 4383ac27a0ecSDave Kleikamp 4384ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4385e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4386ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4387b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4388b31e1552SEric Sandeen "blocksize too small for journal device"); 4389ac27a0ecSDave Kleikamp goto out_bdev; 4390ac27a0ecSDave Kleikamp } 4391ac27a0ecSDave Kleikamp 4392617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4393617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4394ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4395ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4396b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4397b31e1552SEric Sandeen "external journal"); 4398ac27a0ecSDave Kleikamp goto out_bdev; 4399ac27a0ecSDave Kleikamp } 4400ac27a0ecSDave Kleikamp 44012716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4402617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4403ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4404617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4405b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4406b31e1552SEric Sandeen "bad superblock"); 4407ac27a0ecSDave Kleikamp brelse(bh); 4408ac27a0ecSDave Kleikamp goto out_bdev; 4409ac27a0ecSDave Kleikamp } 4410ac27a0ecSDave Kleikamp 4411df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4412df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4413df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4414df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4415df4763beSDarrick J. Wong "corrupt superblock"); 4416df4763beSDarrick J. Wong brelse(bh); 4417df4763beSDarrick J. Wong goto out_bdev; 4418df4763beSDarrick J. Wong } 4419df4763beSDarrick J. Wong 4420617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4421b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4422ac27a0ecSDave Kleikamp brelse(bh); 4423ac27a0ecSDave Kleikamp goto out_bdev; 4424ac27a0ecSDave Kleikamp } 4425ac27a0ecSDave Kleikamp 4426bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4427ac27a0ecSDave Kleikamp start = sb_block + 1; 4428ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4429ac27a0ecSDave Kleikamp 4430dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4431ac27a0ecSDave Kleikamp start, len, blocksize); 4432ac27a0ecSDave Kleikamp if (!journal) { 4433b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4434ac27a0ecSDave Kleikamp goto out_bdev; 4435ac27a0ecSDave Kleikamp } 4436ac27a0ecSDave Kleikamp journal->j_private = sb; 44379f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4438ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4439ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4440b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4441ac27a0ecSDave Kleikamp goto out_journal; 4442ac27a0ecSDave Kleikamp } 4443ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4444b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4445b31e1552SEric Sandeen "user (unsupported) - %d", 4446ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4447ac27a0ecSDave Kleikamp goto out_journal; 4448ac27a0ecSDave Kleikamp } 4449617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4450617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4451ac27a0ecSDave Kleikamp return journal; 44520b8e58a1SAndreas Dilger 4453ac27a0ecSDave Kleikamp out_journal: 4454dab291afSMingming Cao jbd2_journal_destroy(journal); 4455ac27a0ecSDave Kleikamp out_bdev: 4456617ba13bSMingming Cao ext4_blkdev_put(bdev); 4457ac27a0ecSDave Kleikamp return NULL; 4458ac27a0ecSDave Kleikamp } 4459ac27a0ecSDave Kleikamp 4460617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4461617ba13bSMingming Cao struct ext4_super_block *es, 4462ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4463ac27a0ecSDave Kleikamp { 4464ac27a0ecSDave Kleikamp journal_t *journal; 4465ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4466ac27a0ecSDave Kleikamp dev_t journal_dev; 4467ac27a0ecSDave Kleikamp int err = 0; 4468ac27a0ecSDave Kleikamp int really_read_only; 4469ac27a0ecSDave Kleikamp 44700390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44710390131bSFrank Mayhar 4472ac27a0ecSDave Kleikamp if (journal_devnum && 4473ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4474b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4475b31e1552SEric Sandeen "numbers have changed"); 4476ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4477ac27a0ecSDave Kleikamp } else 4478ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4479ac27a0ecSDave Kleikamp 4480ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4481ac27a0ecSDave Kleikamp 4482ac27a0ecSDave Kleikamp /* 4483ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4484ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4485ac27a0ecSDave Kleikamp * can get read-write access to the device. 4486ac27a0ecSDave Kleikamp */ 4487617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4488ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4489b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4490b31e1552SEric Sandeen "required on readonly filesystem"); 4491ac27a0ecSDave Kleikamp if (really_read_only) { 4492b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4493b31e1552SEric Sandeen "unavailable, cannot proceed"); 4494ac27a0ecSDave Kleikamp return -EROFS; 4495ac27a0ecSDave Kleikamp } 4496b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4497b31e1552SEric Sandeen "be enabled during recovery"); 4498ac27a0ecSDave Kleikamp } 4499ac27a0ecSDave Kleikamp } 4500ac27a0ecSDave Kleikamp 4501ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4502b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4503b31e1552SEric Sandeen "and inode journals!"); 4504ac27a0ecSDave Kleikamp return -EINVAL; 4505ac27a0ecSDave Kleikamp } 4506ac27a0ecSDave Kleikamp 4507ac27a0ecSDave Kleikamp if (journal_inum) { 4508617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4509ac27a0ecSDave Kleikamp return -EINVAL; 4510ac27a0ecSDave Kleikamp } else { 4511617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4512ac27a0ecSDave Kleikamp return -EINVAL; 4513ac27a0ecSDave Kleikamp } 4514ac27a0ecSDave Kleikamp 451590576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4516b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 45174776004fSTheodore Ts'o 4518617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4519dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 45201c13d5c0STheodore Ts'o if (!err) { 45211c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 45221c13d5c0STheodore Ts'o if (save) 45231c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 45241c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4525dab291afSMingming Cao err = jbd2_journal_load(journal); 45261c13d5c0STheodore Ts'o if (save) 45271c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 45281c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 45291c13d5c0STheodore Ts'o kfree(save); 45301c13d5c0STheodore Ts'o } 4531ac27a0ecSDave Kleikamp 4532ac27a0ecSDave Kleikamp if (err) { 4533b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4534dab291afSMingming Cao jbd2_journal_destroy(journal); 4535ac27a0ecSDave Kleikamp return err; 4536ac27a0ecSDave Kleikamp } 4537ac27a0ecSDave Kleikamp 4538617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4539617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4540ac27a0ecSDave Kleikamp 4541c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4542ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4543ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4544ac27a0ecSDave Kleikamp 4545ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4546e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4547ac27a0ecSDave Kleikamp } 4548ac27a0ecSDave Kleikamp 4549ac27a0ecSDave Kleikamp return 0; 4550ac27a0ecSDave Kleikamp } 4551ac27a0ecSDave Kleikamp 4552e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4553ac27a0ecSDave Kleikamp { 4554e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4555617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4556c4be0c1dSTakashi Sato int error = 0; 4557ac27a0ecSDave Kleikamp 45587c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4559c4be0c1dSTakashi Sato return error; 4560914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4561914258bfSTheodore Ts'o /* 4562914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4563914258bfSTheodore Ts'o * superblock failed. This could happen because the 4564914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4565914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4566914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4567914258bfSTheodore Ts'o * write and hope for the best. 4568914258bfSTheodore Ts'o */ 4569b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4570b31e1552SEric Sandeen "superblock detected"); 4571914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4572914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4573914258bfSTheodore Ts'o } 457471290b36STheodore Ts'o /* 457571290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 457671290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 457771290b36STheodore Ts'o * write time when we are mounting the root file system 457871290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 457971290b36STheodore Ts'o * for people who are east of GMT and who make their clock 458071290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 458171290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 458271290b36STheodore Ts'o * to complain and force a full file system check. 458371290b36STheodore Ts'o */ 458471290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4585ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4586f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4587afc32f7eSTheodore Ts'o es->s_kbytes_written = 4588afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4589afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4590afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4591f613dfcbSTheodore Ts'o else 4592f613dfcbSTheodore Ts'o es->s_kbytes_written = 4593f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4594d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 459557042651STheodore Ts'o ext4_free_blocks_count_set(es, 459657042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 459757042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4598d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 45997f93cff9STheodore Ts'o es->s_free_inodes_count = 46007f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 46015d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4602ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 460306db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4604ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4605914258bfSTheodore Ts'o if (sync) { 4606c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4607c4be0c1dSTakashi Sato if (error) 4608c4be0c1dSTakashi Sato return error; 4609c4be0c1dSTakashi Sato 4610c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4611c4be0c1dSTakashi Sato if (error) { 4612b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4613b31e1552SEric Sandeen "superblock"); 4614914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4615914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4616914258bfSTheodore Ts'o } 4617914258bfSTheodore Ts'o } 4618c4be0c1dSTakashi Sato return error; 4619ac27a0ecSDave Kleikamp } 4620ac27a0ecSDave Kleikamp 4621ac27a0ecSDave Kleikamp /* 4622ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4623ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4624ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4625ac27a0ecSDave Kleikamp */ 4626617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4627617ba13bSMingming Cao struct ext4_super_block *es) 4628ac27a0ecSDave Kleikamp { 4629617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4630ac27a0ecSDave Kleikamp 46310390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 46320390131bSFrank Mayhar BUG_ON(journal != NULL); 46330390131bSFrank Mayhar return; 46340390131bSFrank Mayhar } 4635dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46367ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 46377ffe1ea8SHidehiro Kawai goto out; 46387ffe1ea8SHidehiro Kawai 4639617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4640ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4641617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4642e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4643ac27a0ecSDave Kleikamp } 46447ffe1ea8SHidehiro Kawai 46457ffe1ea8SHidehiro Kawai out: 4646dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4647ac27a0ecSDave Kleikamp } 4648ac27a0ecSDave Kleikamp 4649ac27a0ecSDave Kleikamp /* 4650ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4651ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4652ac27a0ecSDave Kleikamp * main filesystem now. 4653ac27a0ecSDave Kleikamp */ 4654617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4655617ba13bSMingming Cao struct ext4_super_block *es) 4656ac27a0ecSDave Kleikamp { 4657ac27a0ecSDave Kleikamp journal_t *journal; 4658ac27a0ecSDave Kleikamp int j_errno; 4659ac27a0ecSDave Kleikamp const char *errstr; 4660ac27a0ecSDave Kleikamp 46610390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 46620390131bSFrank Mayhar 4663617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4664ac27a0ecSDave Kleikamp 4665ac27a0ecSDave Kleikamp /* 4666ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4667617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4668ac27a0ecSDave Kleikamp */ 4669ac27a0ecSDave Kleikamp 4670dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4671ac27a0ecSDave Kleikamp if (j_errno) { 4672ac27a0ecSDave Kleikamp char nbuf[16]; 4673ac27a0ecSDave Kleikamp 4674617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 467512062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4676ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 467712062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4678ac27a0ecSDave Kleikamp 4679617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4680617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4681e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4682ac27a0ecSDave Kleikamp 4683dab291afSMingming Cao jbd2_journal_clear_err(journal); 4684d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4685ac27a0ecSDave Kleikamp } 4686ac27a0ecSDave Kleikamp } 4687ac27a0ecSDave Kleikamp 4688ac27a0ecSDave Kleikamp /* 4689ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4690ac27a0ecSDave Kleikamp * and wait on the commit. 4691ac27a0ecSDave Kleikamp */ 4692617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4693ac27a0ecSDave Kleikamp { 4694ac27a0ecSDave Kleikamp journal_t *journal; 4695ac27a0ecSDave Kleikamp 4696ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4697ac27a0ecSDave Kleikamp return 0; 4698ac27a0ecSDave Kleikamp 4699617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4700b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4701ac27a0ecSDave Kleikamp } 4702ac27a0ecSDave Kleikamp 4703617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4704ac27a0ecSDave Kleikamp { 470514ce0cb4STheodore Ts'o int ret = 0; 47069eddacf9SJan Kara tid_t target; 470706a407f1SDmitry Monakhov bool needs_barrier = false; 47088d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4709ac27a0ecSDave Kleikamp 47109bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 47112e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4712a1177825SJan Kara /* 4713a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4714a1177825SJan Kara * no dirty dquots 4715a1177825SJan Kara */ 4716a1177825SJan Kara dquot_writeback_dquots(sb, -1); 471706a407f1SDmitry Monakhov /* 471806a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 471906a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 472006a407f1SDmitry Monakhov * transaction_commit will do it for us. 472106a407f1SDmitry Monakhov */ 4722bda32530STheodore Ts'o if (sbi->s_journal) { 472306a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 472406a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 472506a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 472606a407f1SDmitry Monakhov needs_barrier = true; 472706a407f1SDmitry Monakhov 47288d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4729ac27a0ecSDave Kleikamp if (wait) 4730bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4731bda32530STheodore Ts'o target); 47320390131bSFrank Mayhar } 4733bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4734bda32530STheodore Ts'o needs_barrier = true; 473506a407f1SDmitry Monakhov if (needs_barrier) { 473606a407f1SDmitry Monakhov int err; 473706a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 473806a407f1SDmitry Monakhov if (!ret) 473906a407f1SDmitry Monakhov ret = err; 474006a407f1SDmitry Monakhov } 474106a407f1SDmitry Monakhov 474206a407f1SDmitry Monakhov return ret; 474306a407f1SDmitry Monakhov } 474406a407f1SDmitry Monakhov 4745ac27a0ecSDave Kleikamp /* 4746ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4747ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4748be4f27d3SYongqiang Yang * 4749be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 47508e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 47518e8ad8a5SJan Kara * modifications. 4752ac27a0ecSDave Kleikamp */ 4753c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4754ac27a0ecSDave Kleikamp { 4755c4be0c1dSTakashi Sato int error = 0; 4756c4be0c1dSTakashi Sato journal_t *journal; 4757ac27a0ecSDave Kleikamp 47589ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47599ca92389STheodore Ts'o return 0; 47609ca92389STheodore Ts'o 4761c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4762ac27a0ecSDave Kleikamp 4763*bb044576STheodore Ts'o if (journal) { 4764ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4765dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47667ffe1ea8SHidehiro Kawai 47677ffe1ea8SHidehiro Kawai /* 4768*bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4769*bb044576STheodore Ts'o * flush the journal. 47707ffe1ea8SHidehiro Kawai */ 4771c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 47726b0310fbSEric Sandeen if (error < 0) 47736b0310fbSEric Sandeen goto out; 4774*bb044576STheodore Ts'o } 4775ac27a0ecSDave Kleikamp 4776ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4777617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4778e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 47796b0310fbSEric Sandeen out: 4780*bb044576STheodore Ts'o if (journal) 47818e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4782*bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 47836b0310fbSEric Sandeen return error; 4784ac27a0ecSDave Kleikamp } 4785ac27a0ecSDave Kleikamp 4786ac27a0ecSDave Kleikamp /* 4787ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4788ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4789ac27a0ecSDave Kleikamp */ 4790c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4791ac27a0ecSDave Kleikamp { 47929ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47939ca92389STheodore Ts'o return 0; 47949ca92389STheodore Ts'o 47959ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4796617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4797e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4798c4be0c1dSTakashi Sato return 0; 4799ac27a0ecSDave Kleikamp } 4800ac27a0ecSDave Kleikamp 4801673c6100STheodore Ts'o /* 4802673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4803673c6100STheodore Ts'o */ 4804673c6100STheodore Ts'o struct ext4_mount_options { 4805673c6100STheodore Ts'o unsigned long s_mount_opt; 4806a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 480708cefc7aSEric W. Biederman kuid_t s_resuid; 480808cefc7aSEric W. Biederman kgid_t s_resgid; 4809673c6100STheodore Ts'o unsigned long s_commit_interval; 4810673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4811673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4812673c6100STheodore Ts'o int s_jquota_fmt; 4813a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4814673c6100STheodore Ts'o #endif 4815673c6100STheodore Ts'o }; 4816673c6100STheodore Ts'o 4817617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4818ac27a0ecSDave Kleikamp { 4819617ba13bSMingming Cao struct ext4_super_block *es; 4820617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4821ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4822617ba13bSMingming Cao struct ext4_mount_options old_opts; 4823c79d967dSChristoph Hellwig int enable_quota = 0; 48248a266467STheodore Ts'o ext4_group_t g; 4825b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4826c5e06d10SJohann Lombardi int err = 0; 4827ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 482803dafb5fSChen Gang int i, j; 4829ac27a0ecSDave Kleikamp #endif 4830d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4831ac27a0ecSDave Kleikamp 4832ac27a0ecSDave Kleikamp /* Store the original options */ 4833ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4834ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4835a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4836ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4837ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4838ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 483930773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 484030773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4841ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4842ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4843a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 484403dafb5fSChen Gang if (sbi->s_qf_names[i]) { 484503dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 484603dafb5fSChen Gang GFP_KERNEL); 484703dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 484803dafb5fSChen Gang for (j = 0; j < i; j++) 484903dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 48503e36a163SWei Yongjun kfree(orig_data); 485103dafb5fSChen Gang return -ENOMEM; 485203dafb5fSChen Gang } 485303dafb5fSChen Gang } else 485403dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4855ac27a0ecSDave Kleikamp #endif 4856b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4857b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4858ac27a0ecSDave Kleikamp 4859ac27a0ecSDave Kleikamp /* 4860ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4861ac27a0ecSDave Kleikamp */ 4862661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4863ac27a0ecSDave Kleikamp err = -EINVAL; 4864ac27a0ecSDave Kleikamp goto restore_opts; 4865ac27a0ecSDave Kleikamp } 4866ac27a0ecSDave Kleikamp 48676ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 48686ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 48696ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48706ae6514bSPiotr Sarna "both data=journal and delalloc"); 48716ae6514bSPiotr Sarna err = -EINVAL; 48726ae6514bSPiotr Sarna goto restore_opts; 48736ae6514bSPiotr Sarna } 48746ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 48756ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48766ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 48776ae6514bSPiotr Sarna err = -EINVAL; 48786ae6514bSPiotr Sarna goto restore_opts; 48796ae6514bSPiotr Sarna } 48806ae6514bSPiotr Sarna } 48816ae6514bSPiotr Sarna 48824ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4883c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4884ac27a0ecSDave Kleikamp 4885ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4886482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4887ac27a0ecSDave Kleikamp 4888ac27a0ecSDave Kleikamp es = sbi->s_es; 4889ac27a0ecSDave Kleikamp 4890b3881f74STheodore Ts'o if (sbi->s_journal) { 4891617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4892b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4893b3881f74STheodore Ts'o } 4894ac27a0ecSDave Kleikamp 4895661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 48964ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4897ac27a0ecSDave Kleikamp err = -EROFS; 4898ac27a0ecSDave Kleikamp goto restore_opts; 4899ac27a0ecSDave Kleikamp } 4900ac27a0ecSDave Kleikamp 4901ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 490238c03b34STheodore Ts'o err = sync_filesystem(sb); 490338c03b34STheodore Ts'o if (err < 0) 490438c03b34STheodore Ts'o goto restore_opts; 49050f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 49060f0dd62fSChristoph Hellwig if (err < 0) 4907c79d967dSChristoph Hellwig goto restore_opts; 4908c79d967dSChristoph Hellwig 4909ac27a0ecSDave Kleikamp /* 4910ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4911ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4912ac27a0ecSDave Kleikamp */ 4913ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4914ac27a0ecSDave Kleikamp 4915ac27a0ecSDave Kleikamp /* 4916ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4917ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4918ac27a0ecSDave Kleikamp * mark the partition as valid again. 4919ac27a0ecSDave Kleikamp */ 4920617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4921617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4922ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4923ac27a0ecSDave Kleikamp 4924a63c9eb2STheodore Ts'o if (sbi->s_journal) 4925617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4926ac27a0ecSDave Kleikamp } else { 4927a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4928a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4929ac27a0ecSDave Kleikamp err = -EROFS; 4930ac27a0ecSDave Kleikamp goto restore_opts; 4931ac27a0ecSDave Kleikamp } 4932ead6596bSEric Sandeen /* 49338a266467STheodore Ts'o * Make sure the group descriptor checksums 49340b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 49358a266467STheodore Ts'o */ 49368a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 49378a266467STheodore Ts'o struct ext4_group_desc *gdp = 49388a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 49398a266467STheodore Ts'o 4940feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4941b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4942b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 49438a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 49448a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 49458a266467STheodore Ts'o err = -EINVAL; 49468a266467STheodore Ts'o goto restore_opts; 49478a266467STheodore Ts'o } 49488a266467STheodore Ts'o } 49498a266467STheodore Ts'o 49508a266467STheodore Ts'o /* 4951ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4952ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4953ead6596bSEric Sandeen * require a full umount/remount for now. 4954ead6596bSEric Sandeen */ 4955ead6596bSEric Sandeen if (es->s_last_orphan) { 4956b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4957ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4958ead6596bSEric Sandeen "orphan inode list. Please " 4959b31e1552SEric Sandeen "umount/remount instead"); 4960ead6596bSEric Sandeen err = -EINVAL; 4961ead6596bSEric Sandeen goto restore_opts; 4962ead6596bSEric Sandeen } 4963ead6596bSEric Sandeen 4964ac27a0ecSDave Kleikamp /* 4965ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4966ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4967ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4968ac27a0ecSDave Kleikamp * the partition.) 4969ac27a0ecSDave Kleikamp */ 49700390131bSFrank Mayhar if (sbi->s_journal) 4971617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4972ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4973617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4974ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4975c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4976c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4977c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4978c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4979c5e06d10SJohann Lombardi err = -EROFS; 4980c5e06d10SJohann Lombardi goto restore_opts; 4981c5e06d10SJohann Lombardi } 4982c79d967dSChristoph Hellwig enable_quota = 1; 4983ac27a0ecSDave Kleikamp } 4984ac27a0ecSDave Kleikamp } 4985bfff6873SLukas Czerner 4986bfff6873SLukas Czerner /* 4987bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4988bfff6873SLukas Czerner * current settings 4989bfff6873SLukas Czerner */ 4990bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4991bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4992bfff6873SLukas Czerner else { 4993bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4994bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4995bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4996bfff6873SLukas Czerner } 4997bfff6873SLukas Czerner 49986fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4999d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 5000e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 50010390131bSFrank Mayhar 5002ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5003ac27a0ecSDave Kleikamp /* Release old quota file names */ 5004a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5005ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 50067c319d32SAditya Kali if (enable_quota) { 50077c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 50080f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 50097c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 50107c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 50117c319d32SAditya Kali err = ext4_enable_quotas(sb); 501207724f98STheodore Ts'o if (err) 50137c319d32SAditya Kali goto restore_opts; 50147c319d32SAditya Kali } 50157c319d32SAditya Kali } 50167c319d32SAditya Kali #endif 5017d4c402d9SCurt Wohlgemuth 5018d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5019d4c402d9SCurt Wohlgemuth kfree(orig_data); 5020ac27a0ecSDave Kleikamp return 0; 50210b8e58a1SAndreas Dilger 5022ac27a0ecSDave Kleikamp restore_opts: 5023ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5024ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5025a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5026ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5027ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5028ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 502930773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 503030773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5031ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5032ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5033a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5034ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5035ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5036ac27a0ecSDave Kleikamp } 5037ac27a0ecSDave Kleikamp #endif 5038d4c402d9SCurt Wohlgemuth kfree(orig_data); 5039ac27a0ecSDave Kleikamp return err; 5040ac27a0ecSDave Kleikamp } 5041ac27a0ecSDave Kleikamp 5042617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5043ac27a0ecSDave Kleikamp { 5044ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5045617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5046617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 504727dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5048960cc398SPekka Enberg u64 fsid; 5049d02a9391SKazuya Mio s64 bfree; 505027dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5051ac27a0ecSDave Kleikamp 5052952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5053952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5054ac27a0ecSDave Kleikamp 5055617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5056ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5057b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 505857042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 505957042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5060d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 506157042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 506227dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 506327dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 506427dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5065ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5066ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 506752d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5068617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5069960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5070960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5071960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5072960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 50730b8e58a1SAndreas Dilger 5074ac27a0ecSDave Kleikamp return 0; 5075ac27a0ecSDave Kleikamp } 5076ac27a0ecSDave Kleikamp 50770b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 50780b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5079ac27a0ecSDave Kleikamp * Process 1 Process 2 5080617ba13bSMingming Cao * ext4_create() quota_sync() 5081dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5082871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5083dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5084ac27a0ecSDave Kleikamp * 5085ac27a0ecSDave Kleikamp */ 5086ac27a0ecSDave Kleikamp 5087ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5088ac27a0ecSDave Kleikamp 5089ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5090ac27a0ecSDave Kleikamp { 50914c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5092ac27a0ecSDave Kleikamp } 5093ac27a0ecSDave Kleikamp 5094617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5095ac27a0ecSDave Kleikamp { 5096ac27a0ecSDave Kleikamp int ret, err; 5097ac27a0ecSDave Kleikamp handle_t *handle; 5098ac27a0ecSDave Kleikamp struct inode *inode; 5099ac27a0ecSDave Kleikamp 5100ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 51019924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5102617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5103ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5104ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5105ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5106617ba13bSMingming Cao err = ext4_journal_stop(handle); 5107ac27a0ecSDave Kleikamp if (!ret) 5108ac27a0ecSDave Kleikamp ret = err; 5109ac27a0ecSDave Kleikamp return ret; 5110ac27a0ecSDave Kleikamp } 5111ac27a0ecSDave Kleikamp 5112617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5113ac27a0ecSDave Kleikamp { 5114ac27a0ecSDave Kleikamp int ret, err; 5115ac27a0ecSDave Kleikamp handle_t *handle; 5116ac27a0ecSDave Kleikamp 51179924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5118617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5119ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5120ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5121ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5122617ba13bSMingming Cao err = ext4_journal_stop(handle); 5123ac27a0ecSDave Kleikamp if (!ret) 5124ac27a0ecSDave Kleikamp ret = err; 5125ac27a0ecSDave Kleikamp return ret; 5126ac27a0ecSDave Kleikamp } 5127ac27a0ecSDave Kleikamp 5128617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5129ac27a0ecSDave Kleikamp { 5130ac27a0ecSDave Kleikamp int ret, err; 5131ac27a0ecSDave Kleikamp handle_t *handle; 5132ac27a0ecSDave Kleikamp 51339924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5134617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 51359c3013e9SJan Kara if (IS_ERR(handle)) { 51369c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 51379c3013e9SJan Kara dquot_release(dquot); 5138ac27a0ecSDave Kleikamp return PTR_ERR(handle); 51399c3013e9SJan Kara } 5140ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5141617ba13bSMingming Cao err = ext4_journal_stop(handle); 5142ac27a0ecSDave Kleikamp if (!ret) 5143ac27a0ecSDave Kleikamp ret = err; 5144ac27a0ecSDave Kleikamp return ret; 5145ac27a0ecSDave Kleikamp } 5146ac27a0ecSDave Kleikamp 5147617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5148ac27a0ecSDave Kleikamp { 5149262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5150262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5151262b4662SJan Kara 51522c8be6b2SJan Kara /* Are we journaling quotas? */ 5153262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 5154262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5155ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5156617ba13bSMingming Cao return ext4_write_dquot(dquot); 5157ac27a0ecSDave Kleikamp } else { 5158ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5159ac27a0ecSDave Kleikamp } 5160ac27a0ecSDave Kleikamp } 5161ac27a0ecSDave Kleikamp 5162617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5163ac27a0ecSDave Kleikamp { 5164ac27a0ecSDave Kleikamp int ret, err; 5165ac27a0ecSDave Kleikamp handle_t *handle; 5166ac27a0ecSDave Kleikamp 5167ac27a0ecSDave Kleikamp /* Data block + inode block */ 51689924a92aSTheodore Ts'o handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); 5169ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5170ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5171ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5172617ba13bSMingming Cao err = ext4_journal_stop(handle); 5173ac27a0ecSDave Kleikamp if (!ret) 5174ac27a0ecSDave Kleikamp ret = err; 5175ac27a0ecSDave Kleikamp return ret; 5176ac27a0ecSDave Kleikamp } 5177ac27a0ecSDave Kleikamp 5178ac27a0ecSDave Kleikamp /* 5179ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5180ac27a0ecSDave Kleikamp * the quota file and such... 5181ac27a0ecSDave Kleikamp */ 5182617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5183ac27a0ecSDave Kleikamp { 5184287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5185617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5186ac27a0ecSDave Kleikamp } 5187ac27a0ecSDave Kleikamp 5188ac27a0ecSDave Kleikamp /* 5189ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5190ac27a0ecSDave Kleikamp */ 5191617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5192f00c9e44SJan Kara struct path *path) 5193ac27a0ecSDave Kleikamp { 5194ac27a0ecSDave Kleikamp int err; 5195ac27a0ecSDave Kleikamp 5196ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5197ac27a0ecSDave Kleikamp return -EINVAL; 51980623543bSJan Kara 5199ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5200d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5201ac27a0ecSDave Kleikamp return -EXDEV; 52020623543bSJan Kara /* Journaling quota? */ 52030623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 52042b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5205f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5206b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5207b31e1552SEric Sandeen "Quota file not on filesystem root. " 5208b31e1552SEric Sandeen "Journaled quota will not work"); 52090623543bSJan Kara } 52100623543bSJan Kara 52110623543bSJan Kara /* 52120623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 52130623543bSJan Kara * all updates to the file when we bypass pagecache... 52140623543bSJan Kara */ 52150390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 5216f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 52170623543bSJan Kara /* 52180623543bSJan Kara * We don't need to lock updates but journal_flush() could 52190623543bSJan Kara * otherwise be livelocked... 52200623543bSJan Kara */ 52210623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 52227ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 52230623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5224f00c9e44SJan Kara if (err) 52257ffe1ea8SHidehiro Kawai return err; 52267ffe1ea8SHidehiro Kawai } 52270623543bSJan Kara 5228f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5229ac27a0ecSDave Kleikamp } 5230ac27a0ecSDave Kleikamp 52317c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 52327c319d32SAditya Kali unsigned int flags) 52337c319d32SAditya Kali { 52347c319d32SAditya Kali int err; 52357c319d32SAditya Kali struct inode *qf_inode; 5236a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52377c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52387c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52397c319d32SAditya Kali }; 52407c319d32SAditya Kali 52417c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 52427c319d32SAditya Kali 52437c319d32SAditya Kali if (!qf_inums[type]) 52447c319d32SAditya Kali return -EPERM; 52457c319d32SAditya Kali 52467c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 52477c319d32SAditya Kali if (IS_ERR(qf_inode)) { 52487c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 52497c319d32SAditya Kali return PTR_ERR(qf_inode); 52507c319d32SAditya Kali } 52517c319d32SAditya Kali 5252bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5253bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 52547c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 52557c319d32SAditya Kali iput(qf_inode); 52567c319d32SAditya Kali 52577c319d32SAditya Kali return err; 52587c319d32SAditya Kali } 52597c319d32SAditya Kali 52607c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 52617c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 52627c319d32SAditya Kali { 52637c319d32SAditya Kali int type, err = 0; 5264a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52657c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52667c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52677c319d32SAditya Kali }; 52687c319d32SAditya Kali 52697c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5270a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 52717c319d32SAditya Kali if (qf_inums[type]) { 52727c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 52737c319d32SAditya Kali DQUOT_USAGE_ENABLED); 52747c319d32SAditya Kali if (err) { 52757c319d32SAditya Kali ext4_warning(sb, 527672ba7450STheodore Ts'o "Failed to enable quota tracking " 527772ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 527872ba7450STheodore Ts'o "e2fsck to fix.", type, err); 52797c319d32SAditya Kali return err; 52807c319d32SAditya Kali } 52817c319d32SAditya Kali } 52827c319d32SAditya Kali } 52837c319d32SAditya Kali return 0; 52847c319d32SAditya Kali } 52857c319d32SAditya Kali 52867c319d32SAditya Kali /* 52877c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 52887c319d32SAditya Kali */ 52897c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 52907c319d32SAditya Kali int format_id) 52917c319d32SAditya Kali { 52927c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 52937c319d32SAditya Kali return -EINVAL; 52947c319d32SAditya Kali 52957c319d32SAditya Kali /* 52967c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 52977c319d32SAditya Kali */ 52987c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 52997c319d32SAditya Kali } 53007c319d32SAditya Kali 5301ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5302ca0e05e4SDmitry Monakhov { 530321f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 530421f97697SJan Kara handle_t *handle; 530521f97697SJan Kara 530687009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 530787009d86SDmitry Monakhov * Caller already holds s_umount sem */ 530887009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5309ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5310ca0e05e4SDmitry Monakhov 53110b268590SAmir Goldstein if (!inode) 53120b268590SAmir Goldstein goto out; 53130b268590SAmir Goldstein 531421f97697SJan Kara /* Update modification times of quota files when userspace can 531521f97697SJan Kara * start looking at them */ 53169924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 531721f97697SJan Kara if (IS_ERR(handle)) 531821f97697SJan Kara goto out; 531921f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 532021f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 532121f97697SJan Kara ext4_journal_stop(handle); 532221f97697SJan Kara 532321f97697SJan Kara out: 5324ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5325ca0e05e4SDmitry Monakhov } 5326ca0e05e4SDmitry Monakhov 53277c319d32SAditya Kali /* 53287c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 53297c319d32SAditya Kali */ 53307c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 53317c319d32SAditya Kali { 53327c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 53337c319d32SAditya Kali return -EINVAL; 53347c319d32SAditya Kali 53357c319d32SAditya Kali /* Disable only the limits. */ 53367c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 53377c319d32SAditya Kali } 53387c319d32SAditya Kali 5339ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5340ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5341ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5342ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5343617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5344ac27a0ecSDave Kleikamp size_t len, loff_t off) 5345ac27a0ecSDave Kleikamp { 5346ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5347725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5348ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5349ac27a0ecSDave Kleikamp int tocopy; 5350ac27a0ecSDave Kleikamp size_t toread; 5351ac27a0ecSDave Kleikamp struct buffer_head *bh; 5352ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5353ac27a0ecSDave Kleikamp 5354ac27a0ecSDave Kleikamp if (off > i_size) 5355ac27a0ecSDave Kleikamp return 0; 5356ac27a0ecSDave Kleikamp if (off+len > i_size) 5357ac27a0ecSDave Kleikamp len = i_size-off; 5358ac27a0ecSDave Kleikamp toread = len; 5359ac27a0ecSDave Kleikamp while (toread > 0) { 5360ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5361ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 53621c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 53631c215028STheodore Ts'o if (IS_ERR(bh)) 53641c215028STheodore Ts'o return PTR_ERR(bh); 5365ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5366ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5367ac27a0ecSDave Kleikamp else 5368ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5369ac27a0ecSDave Kleikamp brelse(bh); 5370ac27a0ecSDave Kleikamp offset = 0; 5371ac27a0ecSDave Kleikamp toread -= tocopy; 5372ac27a0ecSDave Kleikamp data += tocopy; 5373ac27a0ecSDave Kleikamp blk++; 5374ac27a0ecSDave Kleikamp } 5375ac27a0ecSDave Kleikamp return len; 5376ac27a0ecSDave Kleikamp } 5377ac27a0ecSDave Kleikamp 5378ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5379ac27a0ecSDave Kleikamp * enough credits) */ 5380617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5381ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5382ac27a0ecSDave Kleikamp { 5383ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5384725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 53851c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5386ac27a0ecSDave Kleikamp struct buffer_head *bh; 5387ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5388ac27a0ecSDave Kleikamp 53890390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5390b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5391b31e1552SEric Sandeen " cancelled because transaction is not started", 53929c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 53939c3013e9SJan Kara return -EIO; 53949c3013e9SJan Kara } 539567eeb568SDmitry Monakhov /* 539667eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 539767eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 539867eeb568SDmitry Monakhov */ 539967eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 540067eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 540167eeb568SDmitry Monakhov " cancelled because not block aligned", 540267eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 540367eeb568SDmitry Monakhov return -EIO; 540467eeb568SDmitry Monakhov } 540567eeb568SDmitry Monakhov 54061c215028STheodore Ts'o bh = ext4_bread(handle, inode, blk, 1); 54071c215028STheodore Ts'o if (IS_ERR(bh)) 54081c215028STheodore Ts'o return PTR_ERR(bh); 5409ac27a0ecSDave Kleikamp if (!bh) 5410ac27a0ecSDave Kleikamp goto out; 54115d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5412617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5413ac27a0ecSDave Kleikamp if (err) { 5414ac27a0ecSDave Kleikamp brelse(bh); 54151c215028STheodore Ts'o return err; 5416ac27a0ecSDave Kleikamp } 5417ac27a0ecSDave Kleikamp lock_buffer(bh); 541867eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5419ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5420ac27a0ecSDave Kleikamp unlock_buffer(bh); 54210390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5422ac27a0ecSDave Kleikamp brelse(bh); 5423ac27a0ecSDave Kleikamp out: 542467eeb568SDmitry Monakhov if (inode->i_size < off + len) { 542567eeb568SDmitry Monakhov i_size_write(inode, off + len); 5426617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5427617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 542821f97697SJan Kara } 542967eeb568SDmitry Monakhov return len; 5430ac27a0ecSDave Kleikamp } 5431ac27a0ecSDave Kleikamp 5432ac27a0ecSDave Kleikamp #endif 5433ac27a0ecSDave Kleikamp 5434152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5435152a0836SAl Viro const char *dev_name, void *data) 5436ac27a0ecSDave Kleikamp { 5437152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5438ac27a0ecSDave Kleikamp } 5439ac27a0ecSDave Kleikamp 544037f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 544124b58424STheodore Ts'o static inline void register_as_ext2(void) 544224b58424STheodore Ts'o { 544324b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 544424b58424STheodore Ts'o if (err) 544524b58424STheodore Ts'o printk(KERN_WARNING 544624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 544724b58424STheodore Ts'o } 544824b58424STheodore Ts'o 544924b58424STheodore Ts'o static inline void unregister_as_ext2(void) 545024b58424STheodore Ts'o { 545124b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 545224b58424STheodore Ts'o } 54532035e776STheodore Ts'o 54542035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 54552035e776STheodore Ts'o { 54562035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 54572035e776STheodore Ts'o return 0; 54582035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54592035e776STheodore Ts'o return 1; 54602035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 54612035e776STheodore Ts'o return 0; 54622035e776STheodore Ts'o return 1; 54632035e776STheodore Ts'o } 546424b58424STheodore Ts'o #else 546524b58424STheodore Ts'o static inline void register_as_ext2(void) { } 546624b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 54672035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 546824b58424STheodore Ts'o #endif 546924b58424STheodore Ts'o 547037f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 547124b58424STheodore Ts'o static inline void register_as_ext3(void) 547224b58424STheodore Ts'o { 547324b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 547424b58424STheodore Ts'o if (err) 547524b58424STheodore Ts'o printk(KERN_WARNING 547624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 547724b58424STheodore Ts'o } 547824b58424STheodore Ts'o 547924b58424STheodore Ts'o static inline void unregister_as_ext3(void) 548024b58424STheodore Ts'o { 548124b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 548224b58424STheodore Ts'o } 54832035e776STheodore Ts'o 54842035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 54852035e776STheodore Ts'o { 54862035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 54872035e776STheodore Ts'o return 0; 54882035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 54892035e776STheodore Ts'o return 0; 54902035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54912035e776STheodore Ts'o return 1; 54922035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 54932035e776STheodore Ts'o return 0; 54942035e776STheodore Ts'o return 1; 54952035e776STheodore Ts'o } 549624b58424STheodore Ts'o #else 549724b58424STheodore Ts'o static inline void register_as_ext3(void) { } 549824b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 54992035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 550024b58424STheodore Ts'o #endif 550124b58424STheodore Ts'o 550203010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5503ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 550403010a33STheodore Ts'o .name = "ext4", 5505152a0836SAl Viro .mount = ext4_mount, 5506ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5507ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5508ac27a0ecSDave Kleikamp }; 55097f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5510ac27a0ecSDave Kleikamp 55118f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5512857ac889SLukas Czerner { 5513857ac889SLukas Czerner struct ext4_features *ef; 5514857ac889SLukas Czerner int ret = -ENOMEM; 5515857ac889SLukas Czerner 5516857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5517857ac889SLukas Czerner if (!ef) 5518857ac889SLukas Czerner goto out; 5519857ac889SLukas Czerner 5520857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5521857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5522857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5523857ac889SLukas Czerner "features"); 5524857ac889SLukas Czerner if (ret) { 5525857ac889SLukas Czerner kfree(ef); 5526857ac889SLukas Czerner goto out; 5527857ac889SLukas Czerner } 5528857ac889SLukas Czerner 5529857ac889SLukas Czerner ext4_feat = ef; 5530857ac889SLukas Czerner ret = 0; 5531857ac889SLukas Czerner out: 5532857ac889SLukas Czerner return ret; 5533857ac889SLukas Czerner } 5534857ac889SLukas Czerner 55358f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 55368f021222SLukas Czerner { 55378f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 55388f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 55398f021222SLukas Czerner kfree(ext4_feat); 55408f021222SLukas Czerner } 55418f021222SLukas Czerner 5542e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5543e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5544e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5545e9e3bcecSEric Sandeen 55465dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5547ac27a0ecSDave Kleikamp { 5548e9e3bcecSEric Sandeen int i, err; 5549c9de560dSAlex Tomas 555007c0c5d8SAl Viro ext4_li_info = NULL; 555107c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 555207c0c5d8SAl Viro 55539a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 555412e9b892SDmitry Monakhov ext4_check_flag_values(); 5555e9e3bcecSEric Sandeen 5556e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5557e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5558e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5559e9e3bcecSEric Sandeen } 5560e9e3bcecSEric Sandeen 556151865fdaSZheng Liu err = ext4_init_es(); 55626fd058f7STheodore Ts'o if (err) 55636fd058f7STheodore Ts'o return err; 556451865fdaSZheng Liu 556551865fdaSZheng Liu err = ext4_init_pageio(); 556651865fdaSZheng Liu if (err) 556751865fdaSZheng Liu goto out7; 556851865fdaSZheng Liu 55695dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5570bd2d0210STheodore Ts'o if (err) 5571d44651d0SFabrice Jouhaud goto out6; 55723197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 55730e376b1eSTheodore Ts'o if (!ext4_kset) { 55740e376b1eSTheodore Ts'o err = -ENOMEM; 5575dd68314cSTheodore Ts'o goto out5; 55760e376b1eSTheodore Ts'o } 5577d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5578857ac889SLukas Czerner 5579857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5580dd68314cSTheodore Ts'o if (err) 5581dd68314cSTheodore Ts'o goto out4; 5582857ac889SLukas Czerner 55835dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5584ac27a0ecSDave Kleikamp if (err) 5585c9de560dSAlex Tomas goto out2; 55869c191f70ST Makphaibulchoke else 55879c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5588ac27a0ecSDave Kleikamp err = init_inodecache(); 5589ac27a0ecSDave Kleikamp if (err) 5590ac27a0ecSDave Kleikamp goto out1; 559124b58424STheodore Ts'o register_as_ext3(); 55922035e776STheodore Ts'o register_as_ext2(); 559303010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5594ac27a0ecSDave Kleikamp if (err) 5595ac27a0ecSDave Kleikamp goto out; 5596bfff6873SLukas Czerner 5597ac27a0ecSDave Kleikamp return 0; 5598ac27a0ecSDave Kleikamp out: 559924b58424STheodore Ts'o unregister_as_ext2(); 560024b58424STheodore Ts'o unregister_as_ext3(); 5601ac27a0ecSDave Kleikamp destroy_inodecache(); 5602ac27a0ecSDave Kleikamp out1: 56039c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 56045dabfc78STheodore Ts'o ext4_exit_mballoc(); 56059c191f70ST Makphaibulchoke out2: 56068f021222SLukas Czerner ext4_exit_feat_adverts(); 56076fd058f7STheodore Ts'o out4: 5608d44651d0SFabrice Jouhaud if (ext4_proc_root) 5609dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5610dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5611d44651d0SFabrice Jouhaud out5: 5612dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5613d44651d0SFabrice Jouhaud out6: 56145dabfc78STheodore Ts'o ext4_exit_pageio(); 561551865fdaSZheng Liu out7: 561651865fdaSZheng Liu ext4_exit_es(); 561751865fdaSZheng Liu 5618ac27a0ecSDave Kleikamp return err; 5619ac27a0ecSDave Kleikamp } 5620ac27a0ecSDave Kleikamp 56215dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5622ac27a0ecSDave Kleikamp { 5623bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 562424b58424STheodore Ts'o unregister_as_ext2(); 562524b58424STheodore Ts'o unregister_as_ext3(); 562603010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5627ac27a0ecSDave Kleikamp destroy_inodecache(); 56285dabfc78STheodore Ts'o ext4_exit_mballoc(); 56298f021222SLukas Czerner ext4_exit_feat_adverts(); 56309f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 56313197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 56325dabfc78STheodore Ts'o ext4_exit_system_zone(); 56335dabfc78STheodore Ts'o ext4_exit_pageio(); 5634dd12ed14SEric Sandeen ext4_exit_es(); 5635ac27a0ecSDave Kleikamp } 5636ac27a0ecSDave Kleikamp 5637ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 563883982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5639ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 56405dabfc78STheodore Ts'o module_init(ext4_init_fs) 56415dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5642