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); 7306a407f1SDmitry Monakhov static int ext4_sync_fs_nojournal(struct super_block *sb, int wait); 74617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 75617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 76c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 77c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 78152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 79152a0836SAl Viro const char *dev_name, void *data); 802035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 812035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 82d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 83bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 84bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 858f1f7453SEric Sandeen static void ext4_clear_request_list(void); 8627dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *, ext4_fsblk_t); 87ac27a0ecSDave Kleikamp 882035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 892035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 902035e776STheodore Ts'o .owner = THIS_MODULE, 912035e776STheodore Ts'o .name = "ext2", 922035e776STheodore Ts'o .mount = ext4_mount, 932035e776STheodore Ts'o .kill_sb = kill_block_super, 942035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 952035e776STheodore Ts'o }; 967f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 97fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 982035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 992035e776STheodore Ts'o #else 1002035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1012035e776STheodore Ts'o #endif 1022035e776STheodore Ts'o 1032035e776STheodore Ts'o 104ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 105ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 106ba69f9abSJan Kara .owner = THIS_MODULE, 107ba69f9abSJan Kara .name = "ext3", 108152a0836SAl Viro .mount = ext4_mount, 109ba69f9abSJan Kara .kill_sb = kill_block_super, 110ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 111ba69f9abSJan Kara }; 1127f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 113fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 114ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 115ba69f9abSJan Kara #else 116ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 117ba69f9abSJan Kara #endif 118bd81d8eeSLaurent Vivier 119d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 120d25425f8SDarrick J. Wong struct ext4_super_block *es) 121d25425f8SDarrick J. Wong { 122d25425f8SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 123d25425f8SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 124d25425f8SDarrick J. Wong return 1; 125d25425f8SDarrick J. Wong 126d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 127d25425f8SDarrick J. Wong } 128d25425f8SDarrick J. Wong 129a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 130a9c47317SDarrick J. Wong struct ext4_super_block *es) 131a9c47317SDarrick J. Wong { 132a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 133a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 134a9c47317SDarrick J. Wong __u32 csum; 135a9c47317SDarrick J. Wong 136a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 137a9c47317SDarrick J. Wong 138a9c47317SDarrick J. Wong return cpu_to_le32(csum); 139a9c47317SDarrick J. Wong } 140a9c47317SDarrick J. Wong 141a9c47317SDarrick J. Wong int ext4_superblock_csum_verify(struct super_block *sb, 142a9c47317SDarrick J. Wong struct ext4_super_block *es) 143a9c47317SDarrick J. Wong { 144a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 145a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 146a9c47317SDarrick J. Wong return 1; 147a9c47317SDarrick J. Wong 148a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 149a9c47317SDarrick J. Wong } 150a9c47317SDarrick J. Wong 15106db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 152a9c47317SDarrick J. Wong { 15306db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 15406db49e6STheodore Ts'o 155a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 156a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 157a9c47317SDarrick J. Wong return; 158a9c47317SDarrick J. Wong 159a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 160a9c47317SDarrick J. Wong } 161a9c47317SDarrick J. Wong 1629933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1639933fc0aSTheodore Ts'o { 1649933fc0aSTheodore Ts'o void *ret; 1659933fc0aSTheodore Ts'o 1668be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1679933fc0aSTheodore Ts'o if (!ret) 1689933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1699933fc0aSTheodore Ts'o return ret; 1709933fc0aSTheodore Ts'o } 1719933fc0aSTheodore Ts'o 1729933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1739933fc0aSTheodore Ts'o { 1749933fc0aSTheodore Ts'o void *ret; 1759933fc0aSTheodore Ts'o 1768be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1779933fc0aSTheodore Ts'o if (!ret) 1789933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1799933fc0aSTheodore Ts'o return ret; 1809933fc0aSTheodore Ts'o } 1819933fc0aSTheodore Ts'o 1829933fc0aSTheodore Ts'o void ext4_kvfree(void *ptr) 1839933fc0aSTheodore Ts'o { 1849933fc0aSTheodore Ts'o if (is_vmalloc_addr(ptr)) 1859933fc0aSTheodore Ts'o vfree(ptr); 1869933fc0aSTheodore Ts'o else 1879933fc0aSTheodore Ts'o kfree(ptr); 1889933fc0aSTheodore Ts'o 1899933fc0aSTheodore Ts'o } 1909933fc0aSTheodore Ts'o 1918fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1928fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 193bd81d8eeSLaurent Vivier { 1943a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1958fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1968fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 197bd81d8eeSLaurent Vivier } 198bd81d8eeSLaurent Vivier 1998fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 2008fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 201bd81d8eeSLaurent Vivier { 2025272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 2038fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2048fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 205bd81d8eeSLaurent Vivier } 206bd81d8eeSLaurent Vivier 2078fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2088fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 209bd81d8eeSLaurent Vivier { 2105272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2118fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2128fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 213bd81d8eeSLaurent Vivier } 214bd81d8eeSLaurent Vivier 215021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 216560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 217560671a0SAneesh Kumar K.V { 218560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 219560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 220560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 221560671a0SAneesh Kumar K.V } 222560671a0SAneesh Kumar K.V 223560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 224560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 225560671a0SAneesh Kumar K.V { 226560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 227560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 228560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 229560671a0SAneesh Kumar K.V } 230560671a0SAneesh Kumar K.V 231560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 232560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 233560671a0SAneesh Kumar K.V { 234560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 235560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 236560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 237560671a0SAneesh Kumar K.V } 238560671a0SAneesh Kumar K.V 239560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 240560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 241560671a0SAneesh Kumar K.V { 242560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 243560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 244560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 245560671a0SAneesh Kumar K.V } 246560671a0SAneesh Kumar K.V 2478fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2488fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 249bd81d8eeSLaurent Vivier { 2503a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2518fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2528fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 253bd81d8eeSLaurent Vivier } 254bd81d8eeSLaurent Vivier 2558fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2568fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 257bd81d8eeSLaurent Vivier { 2585272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2598fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2608fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 261bd81d8eeSLaurent Vivier } 262bd81d8eeSLaurent Vivier 2638fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2648fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 265bd81d8eeSLaurent Vivier { 2665272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2678fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2688fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 269bd81d8eeSLaurent Vivier } 270bd81d8eeSLaurent Vivier 271021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 272560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 273560671a0SAneesh Kumar K.V { 274560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 275560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 276560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 277560671a0SAneesh Kumar K.V } 278560671a0SAneesh Kumar K.V 279560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 280560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 281560671a0SAneesh Kumar K.V { 282560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 283560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 284560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 285560671a0SAneesh Kumar K.V } 286560671a0SAneesh Kumar K.V 287560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 288560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 289560671a0SAneesh Kumar K.V { 290560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 291560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 292560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 293560671a0SAneesh Kumar K.V } 294560671a0SAneesh Kumar K.V 295560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 296560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 297560671a0SAneesh Kumar K.V { 298560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 299560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 300560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 301560671a0SAneesh Kumar K.V } 302560671a0SAneesh Kumar K.V 303d3d1faf6SCurt Wohlgemuth 3041c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3051c13d5c0STheodore Ts'o unsigned int line) 3061c13d5c0STheodore Ts'o { 3071c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3081c13d5c0STheodore Ts'o 3091c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3101c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3111c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3121c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3131c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3141c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3151c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3161c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3171c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3181c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3191c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3201c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3211c13d5c0STheodore Ts'o } 32266e61a9eSTheodore Ts'o /* 32366e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 32466e61a9eSTheodore Ts'o * started already 32566e61a9eSTheodore Ts'o */ 32666e61a9eSTheodore Ts'o if (!es->s_error_count) 32766e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 328ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3291c13d5c0STheodore Ts'o } 3301c13d5c0STheodore Ts'o 3311c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3321c13d5c0STheodore Ts'o unsigned int line) 3331c13d5c0STheodore Ts'o { 3341c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3351c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3361c13d5c0STheodore Ts'o } 3371c13d5c0STheodore Ts'o 3387c2e7087STheodore Ts'o /* 3397c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 3407c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 3417c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 3427c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 3437c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 3447c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 3457c2e7087STheodore Ts'o */ 3467c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 3477c2e7087STheodore Ts'o { 3487c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 3497c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 3507c2e7087STheodore Ts'o 3517c2e7087STheodore Ts'o return bdi->dev == NULL; 3527c2e7087STheodore Ts'o } 3537c2e7087STheodore Ts'o 35418aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 35518aadd47SBobi Jam { 35618aadd47SBobi Jam struct super_block *sb = journal->j_private; 35718aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 35818aadd47SBobi Jam int error = is_journal_aborted(journal); 3595d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 36018aadd47SBobi Jam 3615d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 36218aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3635d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3645d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3655d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 36618aadd47SBobi Jam list_del_init(&jce->jce_list); 36718aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 36818aadd47SBobi Jam jce->jce_func(sb, jce, error); 36918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 37018aadd47SBobi Jam } 37118aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 37218aadd47SBobi Jam } 3731c13d5c0STheodore Ts'o 374ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 375ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 376ac27a0ecSDave Kleikamp * 377ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 378617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 379ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 380ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 381ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 382ac27a0ecSDave Kleikamp * write out the superblock safely. 383ac27a0ecSDave Kleikamp * 384dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 385d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 386ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 387ac27a0ecSDave Kleikamp */ 388ac27a0ecSDave Kleikamp 389617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 390ac27a0ecSDave Kleikamp { 391ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 392ac27a0ecSDave Kleikamp return; 393ac27a0ecSDave Kleikamp 394ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 395617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 396ac27a0ecSDave Kleikamp 3974ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 398ac27a0ecSDave Kleikamp if (journal) 399dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 400ac27a0ecSDave Kleikamp } 401ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 402b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4034418e141SDmitry Monakhov /* 4044418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4054418e141SDmitry Monakhov * before ->s_flags update 4064418e141SDmitry Monakhov */ 4074418e141SDmitry Monakhov smp_wmb(); 408ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 409ac27a0ecSDave Kleikamp } 410ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 411617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 412ac27a0ecSDave Kleikamp sb->s_id); 413ac27a0ecSDave Kleikamp } 414ac27a0ecSDave Kleikamp 415efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 416efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 417efbed4dcSTheodore Ts'o "EXT4-fs error") 418efbed4dcSTheodore Ts'o 41912062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 420c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 421ac27a0ecSDave Kleikamp { 4220ff2ea7dSJoe Perches struct va_format vaf; 423ac27a0ecSDave Kleikamp va_list args; 424ac27a0ecSDave Kleikamp 425efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 426ac27a0ecSDave Kleikamp va_start(args, fmt); 4270ff2ea7dSJoe Perches vaf.fmt = fmt; 4280ff2ea7dSJoe Perches vaf.va = &args; 429efbed4dcSTheodore Ts'o printk(KERN_CRIT 430efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4310ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 432ac27a0ecSDave Kleikamp va_end(args); 433efbed4dcSTheodore Ts'o } 434f3fc0210STheodore Ts'o save_error_info(sb, function, line); 435617ba13bSMingming Cao ext4_handle_error(sb); 436ac27a0ecSDave Kleikamp } 437ac27a0ecSDave Kleikamp 438e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 439c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 440273df556SFrank Mayhar const char *fmt, ...) 441273df556SFrank Mayhar { 442273df556SFrank Mayhar va_list args; 443f7c21177STheodore Ts'o struct va_format vaf; 4441c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 445273df556SFrank Mayhar 4461c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4471c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 448efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 449273df556SFrank Mayhar va_start(args, fmt); 450f7c21177STheodore Ts'o vaf.fmt = fmt; 451f7c21177STheodore Ts'o vaf.va = &args; 452c398eda0STheodore Ts'o if (block) 453d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 454d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 455d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 456d9ee81daSJoe Perches block, current->comm, &vaf); 457d9ee81daSJoe Perches else 458d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 459d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 460d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 461d9ee81daSJoe Perches current->comm, &vaf); 462273df556SFrank Mayhar va_end(args); 463efbed4dcSTheodore Ts'o } 464efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 465273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 466273df556SFrank Mayhar } 467273df556SFrank Mayhar 468e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 469f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 470f7c21177STheodore Ts'o const char *fmt, ...) 471273df556SFrank Mayhar { 472273df556SFrank Mayhar va_list args; 473f7c21177STheodore Ts'o struct va_format vaf; 4741c13d5c0STheodore Ts'o struct ext4_super_block *es; 475496ad9aaSAl Viro struct inode *inode = file_inode(file); 476273df556SFrank Mayhar char pathname[80], *path; 477273df556SFrank Mayhar 4781c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4791c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 480efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 481273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 482f9a62d09SDan Carpenter if (IS_ERR(path)) 483273df556SFrank Mayhar path = "(unknown)"; 484f7c21177STheodore Ts'o va_start(args, fmt); 485f7c21177STheodore Ts'o vaf.fmt = fmt; 486f7c21177STheodore Ts'o vaf.va = &args; 487d9ee81daSJoe Perches if (block) 488d9ee81daSJoe Perches printk(KERN_CRIT 489d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 490d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 491d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 492d9ee81daSJoe Perches block, current->comm, path, &vaf); 493d9ee81daSJoe Perches else 494d9ee81daSJoe Perches printk(KERN_CRIT 495d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 496d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 497d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 498d9ee81daSJoe Perches current->comm, path, &vaf); 499273df556SFrank Mayhar va_end(args); 500efbed4dcSTheodore Ts'o } 501efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 502273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 503273df556SFrank Mayhar } 504273df556SFrank Mayhar 505722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 506ac27a0ecSDave Kleikamp char nbuf[16]) 507ac27a0ecSDave Kleikamp { 508ac27a0ecSDave Kleikamp char *errstr = NULL; 509ac27a0ecSDave Kleikamp 510ac27a0ecSDave Kleikamp switch (errno) { 511ac27a0ecSDave Kleikamp case -EIO: 512ac27a0ecSDave Kleikamp errstr = "IO failure"; 513ac27a0ecSDave Kleikamp break; 514ac27a0ecSDave Kleikamp case -ENOMEM: 515ac27a0ecSDave Kleikamp errstr = "Out of memory"; 516ac27a0ecSDave Kleikamp break; 517ac27a0ecSDave Kleikamp case -EROFS: 51878f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 51978f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 520ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 521ac27a0ecSDave Kleikamp else 522ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 523ac27a0ecSDave Kleikamp break; 524ac27a0ecSDave Kleikamp default: 525ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 526ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 527ac27a0ecSDave Kleikamp * NULL. */ 528ac27a0ecSDave Kleikamp if (nbuf) { 529ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 530ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 531ac27a0ecSDave Kleikamp errstr = nbuf; 532ac27a0ecSDave Kleikamp } 533ac27a0ecSDave Kleikamp break; 534ac27a0ecSDave Kleikamp } 535ac27a0ecSDave Kleikamp 536ac27a0ecSDave Kleikamp return errstr; 537ac27a0ecSDave Kleikamp } 538ac27a0ecSDave Kleikamp 539617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 540ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 541ac27a0ecSDave Kleikamp 542c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 543c398eda0STheodore Ts'o unsigned int line, int errno) 544ac27a0ecSDave Kleikamp { 545ac27a0ecSDave Kleikamp char nbuf[16]; 546ac27a0ecSDave Kleikamp const char *errstr; 547ac27a0ecSDave Kleikamp 548ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 549ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 550ac27a0ecSDave Kleikamp * an error. */ 551ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 552ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 553ac27a0ecSDave Kleikamp return; 554ac27a0ecSDave Kleikamp 555efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 556617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 557c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 558c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 559efbed4dcSTheodore Ts'o } 560ac27a0ecSDave Kleikamp 561efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 562617ba13bSMingming Cao ext4_handle_error(sb); 563ac27a0ecSDave Kleikamp } 564ac27a0ecSDave Kleikamp 565ac27a0ecSDave Kleikamp /* 566617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 567ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 568ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 569ac27a0ecSDave Kleikamp * 570ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 571ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 572ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 573ac27a0ecSDave Kleikamp */ 574ac27a0ecSDave Kleikamp 575c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 576c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 577ac27a0ecSDave Kleikamp { 578ac27a0ecSDave Kleikamp va_list args; 579ac27a0ecSDave Kleikamp 5801c13d5c0STheodore Ts'o save_error_info(sb, function, line); 581ac27a0ecSDave Kleikamp va_start(args, fmt); 582c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 583c398eda0STheodore Ts'o function, line); 584ac27a0ecSDave Kleikamp vprintk(fmt, args); 585ac27a0ecSDave Kleikamp printk("\n"); 586ac27a0ecSDave Kleikamp va_end(args); 587ac27a0ecSDave Kleikamp 5881c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 589b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 5904ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 5914418e141SDmitry Monakhov /* 5924418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 5934418e141SDmitry Monakhov * before ->s_flags update 5944418e141SDmitry Monakhov */ 5954418e141SDmitry Monakhov smp_wmb(); 5964418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 597ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 598dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5991c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6001c13d5c0STheodore Ts'o } 6011c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 6021c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 603ac27a0ecSDave Kleikamp } 604ac27a0ecSDave Kleikamp 605e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 606e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 607b31e1552SEric Sandeen { 6080ff2ea7dSJoe Perches struct va_format vaf; 609b31e1552SEric Sandeen va_list args; 610b31e1552SEric Sandeen 611efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 612efbed4dcSTheodore Ts'o return; 613efbed4dcSTheodore Ts'o 614b31e1552SEric Sandeen va_start(args, fmt); 6150ff2ea7dSJoe Perches vaf.fmt = fmt; 6160ff2ea7dSJoe Perches vaf.va = &args; 6170ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 618b31e1552SEric Sandeen va_end(args); 619b31e1552SEric Sandeen } 620b31e1552SEric Sandeen 62112062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 622c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 623ac27a0ecSDave Kleikamp { 6240ff2ea7dSJoe Perches struct va_format vaf; 625ac27a0ecSDave Kleikamp va_list args; 626ac27a0ecSDave Kleikamp 627efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 628efbed4dcSTheodore Ts'o "EXT4-fs warning")) 629efbed4dcSTheodore Ts'o return; 630efbed4dcSTheodore Ts'o 631ac27a0ecSDave Kleikamp va_start(args, fmt); 6320ff2ea7dSJoe Perches vaf.fmt = fmt; 6330ff2ea7dSJoe Perches vaf.va = &args; 6340ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6350ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 636ac27a0ecSDave Kleikamp va_end(args); 637ac27a0ecSDave Kleikamp } 638ac27a0ecSDave Kleikamp 639e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 640e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 641e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 642e29136f8STheodore Ts'o const char *fmt, ...) 6435d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6445d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6455d1b1b3fSAneesh Kumar K.V { 6460ff2ea7dSJoe Perches struct va_format vaf; 6475d1b1b3fSAneesh Kumar K.V va_list args; 6485d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6495d1b1b3fSAneesh Kumar K.V 6501c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6511c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6521c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6530ff2ea7dSJoe Perches 654efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 6555d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6560ff2ea7dSJoe Perches vaf.fmt = fmt; 6570ff2ea7dSJoe Perches vaf.va = &args; 65821149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 659e29136f8STheodore Ts'o sb->s_id, function, line, grp); 660e29136f8STheodore Ts'o if (ino) 6610ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 662e29136f8STheodore Ts'o if (block) 663efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 664efbed4dcSTheodore Ts'o (unsigned long long) block); 6650ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6665d1b1b3fSAneesh Kumar K.V va_end(args); 667efbed4dcSTheodore Ts'o } 6685d1b1b3fSAneesh Kumar K.V 6695d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 670e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6715d1b1b3fSAneesh Kumar K.V return; 6725d1b1b3fSAneesh Kumar K.V } 6731c13d5c0STheodore Ts'o 6745d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6755d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6765d1b1b3fSAneesh Kumar K.V /* 6775d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6785d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6795d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6805d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6815d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 68225985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 6835d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6845d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6855d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6865d1b1b3fSAneesh Kumar K.V */ 6875d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6885d1b1b3fSAneesh Kumar K.V return; 6895d1b1b3fSAneesh Kumar K.V } 6905d1b1b3fSAneesh Kumar K.V 691617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 692ac27a0ecSDave Kleikamp { 693617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 694ac27a0ecSDave Kleikamp 695617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 696ac27a0ecSDave Kleikamp return; 697ac27a0ecSDave Kleikamp 69812062dddSEric Sandeen ext4_warning(sb, 699ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 700ac27a0ecSDave Kleikamp "running e2fsck is recommended", 701617ba13bSMingming Cao EXT4_DYNAMIC_REV); 702ac27a0ecSDave Kleikamp 703617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 704617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 705617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 706ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 707ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 708ac27a0ecSDave Kleikamp 709ac27a0ecSDave Kleikamp /* 710ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 711ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 712ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 713ac27a0ecSDave Kleikamp */ 714ac27a0ecSDave Kleikamp } 715ac27a0ecSDave Kleikamp 716ac27a0ecSDave Kleikamp /* 717ac27a0ecSDave Kleikamp * Open the external journal device 718ac27a0ecSDave Kleikamp */ 719b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 720ac27a0ecSDave Kleikamp { 721ac27a0ecSDave Kleikamp struct block_device *bdev; 722ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 723ac27a0ecSDave Kleikamp 724d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 725ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 726ac27a0ecSDave Kleikamp goto fail; 727ac27a0ecSDave Kleikamp return bdev; 728ac27a0ecSDave Kleikamp 729ac27a0ecSDave Kleikamp fail: 730b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 731ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 732ac27a0ecSDave Kleikamp return NULL; 733ac27a0ecSDave Kleikamp } 734ac27a0ecSDave Kleikamp 735ac27a0ecSDave Kleikamp /* 736ac27a0ecSDave Kleikamp * Release the journal device 737ac27a0ecSDave Kleikamp */ 7384385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 739ac27a0ecSDave Kleikamp { 7404385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 741ac27a0ecSDave Kleikamp } 742ac27a0ecSDave Kleikamp 7434385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 744ac27a0ecSDave Kleikamp { 745ac27a0ecSDave Kleikamp struct block_device *bdev; 746ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 747ac27a0ecSDave Kleikamp if (bdev) { 7484385bab1SAl Viro ext4_blkdev_put(bdev); 749ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 750ac27a0ecSDave Kleikamp } 751ac27a0ecSDave Kleikamp } 752ac27a0ecSDave Kleikamp 753ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 754ac27a0ecSDave Kleikamp { 755617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 756ac27a0ecSDave Kleikamp } 757ac27a0ecSDave Kleikamp 758617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 759ac27a0ecSDave Kleikamp { 760ac27a0ecSDave Kleikamp struct list_head *l; 761ac27a0ecSDave Kleikamp 762b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 763ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 764ac27a0ecSDave Kleikamp 765ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 766ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 767ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 768ac27a0ecSDave Kleikamp printk(KERN_ERR " " 769ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 770ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 771ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 772ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 773ac27a0ecSDave Kleikamp } 774ac27a0ecSDave Kleikamp } 775ac27a0ecSDave Kleikamp 776617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 777ac27a0ecSDave Kleikamp { 778617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 779617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 780ef2cabf7SHidehiro Kawai int i, err; 781ac27a0ecSDave Kleikamp 782857ac889SLukas Czerner ext4_unregister_li_request(sb); 783e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 784e0ccfd95SChristoph Hellwig 7852e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 7862e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 7874c0425ffSMingming Cao 7880390131bSFrank Mayhar if (sbi->s_journal) { 789ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 79047b4a50bSJan Kara sbi->s_journal = NULL; 791ef2cabf7SHidehiro Kawai if (err < 0) 792c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7930390131bSFrank Mayhar } 794d4edac31SJosef Bacik 795d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 7969105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 797d4edac31SJosef Bacik ext4_release_system_zone(sb); 798d4edac31SJosef Bacik ext4_mb_release(sb); 799d4edac31SJosef Bacik ext4_ext_release(sb); 800d4edac31SJosef Bacik ext4_xattr_put_super(sb); 801d4edac31SJosef Bacik 802ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 803617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 804ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 805ac27a0ecSDave Kleikamp } 80658c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 807a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 808a8e25a83SArtem Bityutskiy 809240799cdSTheodore Ts'o if (sbi->s_proc) { 81066acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 8119f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 812240799cdSTheodore Ts'o } 8133197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 814ac27a0ecSDave Kleikamp 815ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 816ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 817f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 8189933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 81957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 820ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 821ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 82257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 8231ac6466fSTheodore Ts'o percpu_counter_destroy(&sbi->s_extent_cache_cnt); 824ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 825ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 826ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 827ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 828ac27a0ecSDave Kleikamp #endif 829ac27a0ecSDave Kleikamp 830ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 831ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 832ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 833ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 834ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 835ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 836ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 837ac27a0ecSDave Kleikamp 838f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 839ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 840ac27a0ecSDave Kleikamp /* 841ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 842ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 843ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 844ac27a0ecSDave Kleikamp */ 845ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 846f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 847617ba13bSMingming Cao ext4_blkdev_remove(sbi); 848ac27a0ecSDave Kleikamp } 8499c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 8509c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 8519c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 8529c191f70ST Makphaibulchoke } 853c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 854c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 855ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8563197ebdbSTheodore Ts'o /* 8573197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8583197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8593197ebdbSTheodore Ts'o */ 8603197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8613197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 8620441984aSDarrick J. Wong if (sbi->s_chksum_driver) 8630441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 864705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 865ac27a0ecSDave Kleikamp kfree(sbi); 866ac27a0ecSDave Kleikamp } 867ac27a0ecSDave Kleikamp 868e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 869ac27a0ecSDave Kleikamp 870ac27a0ecSDave Kleikamp /* 871ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 872ac27a0ecSDave Kleikamp */ 873617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 874ac27a0ecSDave Kleikamp { 875617ba13bSMingming Cao struct ext4_inode_info *ei; 876ac27a0ecSDave Kleikamp 877e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 878ac27a0ecSDave Kleikamp if (!ei) 879ac27a0ecSDave Kleikamp return NULL; 8800b8e58a1SAndreas Dilger 881ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 882202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 883c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 884c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8859a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 8869a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 88774cd15cdSZheng Liu INIT_LIST_HEAD(&ei->i_es_lru); 88874cd15cdSZheng Liu ei->i_es_lru_nr = 0; 889d3922a77SZheng Liu ei->i_touch_when = 0; 890d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 891d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 892d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8939d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 8947e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 895d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 896a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 897a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 898a9e7f447SDmitry Monakhov #endif 8998aefcd55STheodore Ts'o ei->jinode = NULL; 9002e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 901744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 902b436b9beSJan Kara ei->i_sync_tid = 0; 903b436b9beSJan Kara ei->i_datasync_tid = 0; 904f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 905e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9062e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 9070b8e58a1SAndreas Dilger 908ac27a0ecSDave Kleikamp return &ei->vfs_inode; 909ac27a0ecSDave Kleikamp } 910ac27a0ecSDave Kleikamp 9117ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9127ff9c073STheodore Ts'o { 9137ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9147ff9c073STheodore Ts'o 9157ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9167ff9c073STheodore Ts'o return drop; 9177ff9c073STheodore Ts'o } 9187ff9c073STheodore Ts'o 919fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 920fa0d7e3dSNick Piggin { 921fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 922fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 923fa0d7e3dSNick Piggin } 924fa0d7e3dSNick Piggin 925617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 926ac27a0ecSDave Kleikamp { 9279f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 928b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 929b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 930b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9319f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9329f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9339f7dd93dSVasily Averin true); 9349f7dd93dSVasily Averin dump_stack(); 9359f7dd93dSVasily Averin } 936fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 937ac27a0ecSDave Kleikamp } 938ac27a0ecSDave Kleikamp 93951cc5068SAlexey Dobriyan static void init_once(void *foo) 940ac27a0ecSDave Kleikamp { 941617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 942ac27a0ecSDave Kleikamp 943ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 944ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9450e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 946ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 947ac27a0ecSDave Kleikamp } 948ac27a0ecSDave Kleikamp 949e67bc2b3SFabian Frederick static int __init init_inodecache(void) 950ac27a0ecSDave Kleikamp { 951617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 952617ba13bSMingming Cao sizeof(struct ext4_inode_info), 953ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 954ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 95520c2df83SPaul Mundt init_once); 956617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 957ac27a0ecSDave Kleikamp return -ENOMEM; 958ac27a0ecSDave Kleikamp return 0; 959ac27a0ecSDave Kleikamp } 960ac27a0ecSDave Kleikamp 961ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 962ac27a0ecSDave Kleikamp { 9638c0a8537SKirill A. Shutemov /* 9648c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 9658c0a8537SKirill A. Shutemov * destroy cache. 9668c0a8537SKirill A. Shutemov */ 9678c0a8537SKirill A. Shutemov rcu_barrier(); 968617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 969ac27a0ecSDave Kleikamp } 970ac27a0ecSDave Kleikamp 9710930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 972ac27a0ecSDave Kleikamp { 9730930fcc1SAl Viro invalidate_inode_buffers(inode); 974dbd5768fSJan Kara clear_inode(inode); 9759f754758SChristoph Hellwig dquot_drop(inode); 976c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 97751865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 97874cd15cdSZheng Liu ext4_es_lru_del(inode); 9798aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9808aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9818aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9828aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9838aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9848aefcd55STheodore Ts'o } 985ac27a0ecSDave Kleikamp } 986ac27a0ecSDave Kleikamp 9871b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9881b961ac0SChristoph Hellwig u64 ino, u32 generation) 989ac27a0ecSDave Kleikamp { 990ac27a0ecSDave Kleikamp struct inode *inode; 991ac27a0ecSDave Kleikamp 992617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 993ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 994617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 995ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 996ac27a0ecSDave Kleikamp 997ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 998ac27a0ecSDave Kleikamp * 999617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1000ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1001ac27a0ecSDave Kleikamp * 1002ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1003ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1004ac27a0ecSDave Kleikamp */ 10051d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10061d1fe1eeSDavid Howells if (IS_ERR(inode)) 10071d1fe1eeSDavid Howells return ERR_CAST(inode); 10081d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1009ac27a0ecSDave Kleikamp iput(inode); 1010ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1011ac27a0ecSDave Kleikamp } 10121b961ac0SChristoph Hellwig 10131b961ac0SChristoph Hellwig return inode; 1014ac27a0ecSDave Kleikamp } 10151b961ac0SChristoph Hellwig 10161b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10171b961ac0SChristoph Hellwig int fh_len, int fh_type) 10181b961ac0SChristoph Hellwig { 10191b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10201b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10211b961ac0SChristoph Hellwig } 10221b961ac0SChristoph Hellwig 10231b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10241b961ac0SChristoph Hellwig int fh_len, int fh_type) 10251b961ac0SChristoph Hellwig { 10261b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10271b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1028ac27a0ecSDave Kleikamp } 1029ac27a0ecSDave Kleikamp 1030c39a7f84SToshiyuki Okajima /* 1031c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1032c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1033c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1034c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1035c39a7f84SToshiyuki Okajima */ 10360b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10370b8e58a1SAndreas Dilger gfp_t wait) 1038c39a7f84SToshiyuki Okajima { 1039c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1040c39a7f84SToshiyuki Okajima 1041c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1042c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1043c39a7f84SToshiyuki Okajima return 0; 1044c39a7f84SToshiyuki Okajima if (journal) 1045c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1046c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1047c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1048c39a7f84SToshiyuki Okajima } 1049c39a7f84SToshiyuki Okajima 1050ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1051ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1052ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1053ac27a0ecSDave Kleikamp 1054617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1055617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1056617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1057617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1058617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10596f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1060f00c9e44SJan Kara struct path *path); 10617c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 10627c319d32SAditya Kali int format_id); 1063ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 10647c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type); 1065617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1066617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1067ac27a0ecSDave Kleikamp size_t len, loff_t off); 1068617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1069ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 10707c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 10717c319d32SAditya Kali unsigned int flags); 10727c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1073ac27a0ecSDave Kleikamp 107461e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 107560e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1076617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1077617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1078617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1079617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1080a5b5ee32SJan Kara .write_info = ext4_write_info, 1081a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1082a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1083ac27a0ecSDave Kleikamp }; 1084ac27a0ecSDave Kleikamp 10850d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1086617ba13bSMingming Cao .quota_on = ext4_quota_on, 1087ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1088287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1089287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1090287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1091287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1092287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1093ac27a0ecSDave Kleikamp }; 10947c319d32SAditya Kali 10957c319d32SAditya Kali static const struct quotactl_ops ext4_qctl_sysfile_operations = { 10967c319d32SAditya Kali .quota_on_meta = ext4_quota_on_sysfile, 10977c319d32SAditya Kali .quota_off = ext4_quota_off_sysfile, 10987c319d32SAditya Kali .quota_sync = dquot_quota_sync, 10997c319d32SAditya Kali .get_info = dquot_get_dqinfo, 11007c319d32SAditya Kali .set_info = dquot_set_dqinfo, 11017c319d32SAditya Kali .get_dqblk = dquot_get_dqblk, 11027c319d32SAditya Kali .set_dqblk = dquot_set_dqblk 11037c319d32SAditya Kali }; 1104ac27a0ecSDave Kleikamp #endif 1105ac27a0ecSDave Kleikamp 1106ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1107617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1108617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1109617ba13bSMingming Cao .write_inode = ext4_write_inode, 1110617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11117ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11120930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1113617ba13bSMingming Cao .put_super = ext4_put_super, 1114617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1115c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1116c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1117617ba13bSMingming Cao .statfs = ext4_statfs, 1118617ba13bSMingming Cao .remount_fs = ext4_remount, 1119617ba13bSMingming Cao .show_options = ext4_show_options, 1120ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1121617ba13bSMingming Cao .quota_read = ext4_quota_read, 1122617ba13bSMingming Cao .quota_write = ext4_quota_write, 1123ac27a0ecSDave Kleikamp #endif 1124c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1125ac27a0ecSDave Kleikamp }; 1126ac27a0ecSDave Kleikamp 11279ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11289ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11299ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11309ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11319ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11327ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11330930fcc1SAl Viro .evict_inode = ext4_evict_inode, 113406a407f1SDmitry Monakhov .sync_fs = ext4_sync_fs_nojournal, 11359ca92389STheodore Ts'o .put_super = ext4_put_super, 11369ca92389STheodore Ts'o .statfs = ext4_statfs, 11379ca92389STheodore Ts'o .remount_fs = ext4_remount, 11389ca92389STheodore Ts'o .show_options = ext4_show_options, 11399ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 11409ca92389STheodore Ts'o .quota_read = ext4_quota_read, 11419ca92389STheodore Ts'o .quota_write = ext4_quota_write, 11429ca92389STheodore Ts'o #endif 11439ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 11449ca92389STheodore Ts'o }; 11459ca92389STheodore Ts'o 114639655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11471b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11481b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1149617ba13bSMingming Cao .get_parent = ext4_get_parent, 1150ac27a0ecSDave Kleikamp }; 1151ac27a0ecSDave Kleikamp 1152ac27a0ecSDave Kleikamp enum { 1153ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1154ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 115572578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1156ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 115772578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1158ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1159ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1160ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1161296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1162ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11635a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1164ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1165661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 11661449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 11671449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11685328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1169744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1170fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1171df981d03STheodore Ts'o Opt_max_dir_size_kb, 1172ac27a0ecSDave Kleikamp }; 1173ac27a0ecSDave Kleikamp 1174a447c093SSteven Whitehouse static const match_table_t tokens = { 1175ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1176ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1177ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1178ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1179ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1180ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1181ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1182ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1183ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1184ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1185ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1186ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1187ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1188ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 118972578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 119072578c33STheodore Ts'o {Opt_removed, "orlov"}, 1191ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1192ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1193ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1194ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1195e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11965a916be1STheodore Ts'o {Opt_noload, "noload"}, 119772578c33STheodore Ts'o {Opt_removed, "nobh"}, 119872578c33STheodore Ts'o {Opt_removed, "bh"}, 1199ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 120030773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 120130773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1202ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1203ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1204818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1205818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1206ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1207ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1208ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1209ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12105bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12115bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1212ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1213ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1214ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1215ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1216ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1217ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12185a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1219ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1220ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1221ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1222ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1223ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 122406705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 122506705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 122625ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1227c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 122864769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1229dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 123036ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 123136ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 12326fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12336fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1234240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1235b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1236afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 123706705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 123806705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1239744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1240744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12415328e635SEric Sandeen {Opt_discard, "discard"}, 12425328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1243fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1244fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1245fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1246df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1247c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1248c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1249c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1250c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1251c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1252f3f12faaSJosef Bacik {Opt_err, NULL}, 1253ac27a0ecSDave Kleikamp }; 1254ac27a0ecSDave Kleikamp 1255617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1256ac27a0ecSDave Kleikamp { 1257617ba13bSMingming Cao ext4_fsblk_t sb_block; 1258ac27a0ecSDave Kleikamp char *options = (char *) *data; 1259ac27a0ecSDave Kleikamp 1260ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1261ac27a0ecSDave Kleikamp return 1; /* Default location */ 12620b8e58a1SAndreas Dilger 1263ac27a0ecSDave Kleikamp options += 3; 12640b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1265ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1266ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12674776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1268ac27a0ecSDave Kleikamp (char *) *data); 1269ac27a0ecSDave Kleikamp return 1; 1270ac27a0ecSDave Kleikamp } 1271ac27a0ecSDave Kleikamp if (*options == ',') 1272ac27a0ecSDave Kleikamp options++; 1273ac27a0ecSDave Kleikamp *data = (void *) options; 12740b8e58a1SAndreas Dilger 1275ac27a0ecSDave Kleikamp return sb_block; 1276ac27a0ecSDave Kleikamp } 1277ac27a0ecSDave Kleikamp 1278b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1279437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1280437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1281b3881f74STheodore Ts'o 128256c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 128356c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 128456c50f11SDmitry Monakhov { 128556c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 128656c50f11SDmitry Monakhov char *qname; 128703dafb5fSChen Gang int ret = -1; 128856c50f11SDmitry Monakhov 128956c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 129056c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 129156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129256c50f11SDmitry Monakhov "Cannot change journaled " 129356c50f11SDmitry Monakhov "quota options when quota turned on"); 129457f73c2cSTheodore Ts'o return -1; 129556c50f11SDmitry Monakhov } 1296262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1297262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1298262b4662SJan Kara "when QUOTA feature is enabled"); 1299262b4662SJan Kara return -1; 1300262b4662SJan Kara } 130156c50f11SDmitry Monakhov qname = match_strdup(args); 130256c50f11SDmitry Monakhov if (!qname) { 130356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 130456c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 130557f73c2cSTheodore Ts'o return -1; 130656c50f11SDmitry Monakhov } 130703dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 130803dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 130903dafb5fSChen Gang ret = 1; 131003dafb5fSChen Gang else 131156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 131203dafb5fSChen Gang "%s quota file already specified", 131303dafb5fSChen Gang QTYPE2NAME(qtype)); 131403dafb5fSChen Gang goto errout; 131556c50f11SDmitry Monakhov } 131603dafb5fSChen Gang if (strchr(qname, '/')) { 131756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 131856c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 131903dafb5fSChen Gang goto errout; 132056c50f11SDmitry Monakhov } 132103dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1322fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 132356c50f11SDmitry Monakhov return 1; 132403dafb5fSChen Gang errout: 132503dafb5fSChen Gang kfree(qname); 132603dafb5fSChen Gang return ret; 132756c50f11SDmitry Monakhov } 132856c50f11SDmitry Monakhov 132956c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 133056c50f11SDmitry Monakhov { 133156c50f11SDmitry Monakhov 133256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 133356c50f11SDmitry Monakhov 133456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 133556c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 133656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 133756c50f11SDmitry Monakhov " when quota turned on"); 133857f73c2cSTheodore Ts'o return -1; 133956c50f11SDmitry Monakhov } 134003dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 134156c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 134256c50f11SDmitry Monakhov return 1; 134356c50f11SDmitry Monakhov } 134456c50f11SDmitry Monakhov #endif 134556c50f11SDmitry Monakhov 134626092bf5STheodore Ts'o #define MOPT_SET 0x0001 134726092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 134826092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 134926092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 135026092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 135126092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 135226092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 135326092bf5STheodore Ts'o #define MOPT_Q 0 135426092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 135526092bf5STheodore Ts'o #else 135626092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 135726092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 135826092bf5STheodore Ts'o #endif 135926092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13608dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13618dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13628dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1363ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 136426092bf5STheodore Ts'o 136526092bf5STheodore Ts'o static const struct mount_opts { 136626092bf5STheodore Ts'o int token; 136726092bf5STheodore Ts'o int mount_opt; 136826092bf5STheodore Ts'o int flags; 136926092bf5STheodore Ts'o } ext4_mount_opts[] = { 137026092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 137126092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 137226092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 137326092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 137426092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 137526092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13768dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13778dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13788dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13798dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 138026092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 138126092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13828dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13838dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13848dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 138559d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 13868dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 13878dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 138826092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13898dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 13908dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13918dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 139226092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 139326092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 139426092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13958dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13968dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13978dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13988dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 139926092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 140026092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 140126092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 140226092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 140326092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 140426092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 140526092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 140626092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 140726092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 140826092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 140926092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 14100efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 14110efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 14120efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 1413ad4eec61SEric Sandeen {Opt_journal_path, 0, MOPT_STRING}, 14140efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 14158dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14168dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14178dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 14188dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 141926092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 142026092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 142126092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 142226092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 142326092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 142426092bf5STheodore Ts'o #else 142526092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 142626092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 142726092bf5STheodore Ts'o #endif 142826092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 142926092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 143026092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 143126092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 143226092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 143326092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 143426092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 143526092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 143626092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 143726092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 143826092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 143926092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 144026092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 144126092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 144226092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 144326092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1444df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 144526092bf5STheodore Ts'o {Opt_err, 0, 0} 144626092bf5STheodore Ts'o }; 144726092bf5STheodore Ts'o 144826092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 144926092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 145026092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 145126092bf5STheodore Ts'o { 145226092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 145326092bf5STheodore Ts'o const struct mount_opts *m; 145408cefc7aSEric W. Biederman kuid_t uid; 145508cefc7aSEric W. Biederman kgid_t gid; 145626092bf5STheodore Ts'o int arg = 0; 145726092bf5STheodore Ts'o 145857f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 145957f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 146057f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 146157f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 146257f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 146357f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 146457f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 146557f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 146657f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 146757f73c2cSTheodore Ts'o #endif 146826092bf5STheodore Ts'o switch (token) { 1469f7048605STheodore Ts'o case Opt_noacl: 1470f7048605STheodore Ts'o case Opt_nouser_xattr: 1471f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1472f7048605STheodore Ts'o break; 147326092bf5STheodore Ts'o case Opt_sb: 147426092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 147526092bf5STheodore Ts'o case Opt_removed: 14765f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 147726092bf5STheodore Ts'o return 1; 147826092bf5STheodore Ts'o case Opt_abort: 147926092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 148026092bf5STheodore Ts'o return 1; 148126092bf5STheodore Ts'o case Opt_i_version: 148226092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 148326092bf5STheodore Ts'o return 1; 148426092bf5STheodore Ts'o } 148526092bf5STheodore Ts'o 14865f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14875f3633e3SJan Kara if (token == m->token) 14885f3633e3SJan Kara break; 14895f3633e3SJan Kara 14905f3633e3SJan Kara if (m->token == Opt_err) { 14915f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 14925f3633e3SJan Kara "or missing value", opt); 14935f3633e3SJan Kara return -1; 14945f3633e3SJan Kara } 14955f3633e3SJan Kara 14968dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 14978dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14988dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 14998dc0aa8cSTheodore Ts'o return -1; 15008dc0aa8cSTheodore Ts'o } 15018dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 15028dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 15038dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 15048dc0aa8cSTheodore Ts'o return -1; 15058dc0aa8cSTheodore Ts'o } 15068dc0aa8cSTheodore Ts'o 1507ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 15080efb3b23SJan Kara return -1; 150926092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 151026092bf5STheodore Ts'o return -1; 151126092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 151226092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 151326092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 151426092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 151526092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 151626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 151726092bf5STheodore Ts'o "options when quota turned on"); 151826092bf5STheodore Ts'o return -1; 151926092bf5STheodore Ts'o } 152026092bf5STheodore Ts'o 152126092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 152226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 152326092bf5STheodore Ts'o } else if (token == Opt_commit) { 152426092bf5STheodore Ts'o if (arg == 0) 152526092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 152626092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 152726092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 152826092bf5STheodore Ts'o if (arg == 0) 152926092bf5STheodore Ts'o arg = EXT4_DEF_MAX_BATCH_TIME; 153026092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 153126092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 153226092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 153326092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1534e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1535e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1536e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1537e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 153826092bf5STheodore Ts'o return -1; 153926092bf5STheodore Ts'o } 154026092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 154126092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 154226092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 154326092bf5STheodore Ts'o if (!args->from) 154426092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 154526092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1546df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1547df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 154826092bf5STheodore Ts'o } else if (token == Opt_stripe) { 154926092bf5STheodore Ts'o sbi->s_stripe = arg; 15500efb3b23SJan Kara } else if (token == Opt_resuid) { 15510efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15520efb3b23SJan Kara if (!uid_valid(uid)) { 15535f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15540efb3b23SJan Kara return -1; 15550efb3b23SJan Kara } 15560efb3b23SJan Kara sbi->s_resuid = uid; 15570efb3b23SJan Kara } else if (token == Opt_resgid) { 15580efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15590efb3b23SJan Kara if (!gid_valid(gid)) { 15605f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15610efb3b23SJan Kara return -1; 15620efb3b23SJan Kara } 15630efb3b23SJan Kara sbi->s_resgid = gid; 15640efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15650efb3b23SJan Kara if (is_remount) { 15660efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15670efb3b23SJan Kara "Cannot specify journal on remount"); 15680efb3b23SJan Kara return -1; 15690efb3b23SJan Kara } 15700efb3b23SJan Kara *journal_devnum = arg; 1571ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1572ad4eec61SEric Sandeen char *journal_path; 1573ad4eec61SEric Sandeen struct inode *journal_inode; 1574ad4eec61SEric Sandeen struct path path; 1575ad4eec61SEric Sandeen int error; 1576ad4eec61SEric Sandeen 1577ad4eec61SEric Sandeen if (is_remount) { 1578ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1579ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1580ad4eec61SEric Sandeen return -1; 1581ad4eec61SEric Sandeen } 1582ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1583ad4eec61SEric Sandeen if (!journal_path) { 1584ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1585ad4eec61SEric Sandeen "journal device string"); 1586ad4eec61SEric Sandeen return -1; 1587ad4eec61SEric Sandeen } 1588ad4eec61SEric Sandeen 1589ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1590ad4eec61SEric Sandeen if (error) { 1591ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1592ad4eec61SEric Sandeen "journal device path: error %d", error); 1593ad4eec61SEric Sandeen kfree(journal_path); 1594ad4eec61SEric Sandeen return -1; 1595ad4eec61SEric Sandeen } 1596ad4eec61SEric Sandeen 1597ad4eec61SEric Sandeen journal_inode = path.dentry->d_inode; 1598ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1599ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1600ad4eec61SEric Sandeen "is not a block device", journal_path); 1601ad4eec61SEric Sandeen path_put(&path); 1602ad4eec61SEric Sandeen kfree(journal_path); 1603ad4eec61SEric Sandeen return -1; 1604ad4eec61SEric Sandeen } 1605ad4eec61SEric Sandeen 1606ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1607ad4eec61SEric Sandeen path_put(&path); 1608ad4eec61SEric Sandeen kfree(journal_path); 16090efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 16100efb3b23SJan Kara if (arg > 7) { 16115f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 16120efb3b23SJan Kara " (must be 0-7)"); 16130efb3b23SJan Kara return -1; 16140efb3b23SJan Kara } 16150efb3b23SJan Kara *journal_ioprio = 16160efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 161726092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 161826092bf5STheodore Ts'o if (is_remount) { 161926092bf5STheodore Ts'o if (!sbi->s_journal) 162026092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 16215f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 162226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 162326092bf5STheodore Ts'o "Cannot change data mode on remount"); 162426092bf5STheodore Ts'o return -1; 162526092bf5STheodore Ts'o } 162626092bf5STheodore Ts'o } else { 162726092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 162826092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 162926092bf5STheodore Ts'o } 163026092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 163126092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 163226092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 163326092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16345f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16355f3633e3SJan Kara "quota options when quota turned on"); 163626092bf5STheodore Ts'o return -1; 163726092bf5STheodore Ts'o } 1638262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1639262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1640262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1641262b4662SJan Kara "Cannot set journaled quota options " 1642262b4662SJan Kara "when QUOTA feature is enabled"); 1643262b4662SJan Kara return -1; 1644262b4662SJan Kara } 164526092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 164626092bf5STheodore Ts'o #endif 164726092bf5STheodore Ts'o } else { 164826092bf5STheodore Ts'o if (!args->from) 164926092bf5STheodore Ts'o arg = 1; 165026092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 165126092bf5STheodore Ts'o arg = !arg; 165226092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 165326092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 165426092bf5STheodore Ts'o "buggy handling of option %s", opt); 165526092bf5STheodore Ts'o WARN_ON(1); 165626092bf5STheodore Ts'o return -1; 165726092bf5STheodore Ts'o } 165826092bf5STheodore Ts'o if (arg != 0) 165926092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 166026092bf5STheodore Ts'o else 166126092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 166226092bf5STheodore Ts'o } 166326092bf5STheodore Ts'o return 1; 166426092bf5STheodore Ts'o } 166526092bf5STheodore Ts'o 1666ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1667c3191067STheodore Ts'o unsigned long *journal_devnum, 1668b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1669661aa520SEric Sandeen int is_remount) 1670ac27a0ecSDave Kleikamp { 1671617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1672ac27a0ecSDave Kleikamp char *p; 1673ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 167426092bf5STheodore Ts'o int token; 1675ac27a0ecSDave Kleikamp 1676ac27a0ecSDave Kleikamp if (!options) 1677ac27a0ecSDave Kleikamp return 1; 1678ac27a0ecSDave Kleikamp 1679ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1680ac27a0ecSDave Kleikamp if (!*p) 1681ac27a0ecSDave Kleikamp continue; 168215121c18SEric Sandeen /* 168315121c18SEric Sandeen * Initialize args struct so we know whether arg was 168415121c18SEric Sandeen * found; some options take optional arguments. 168515121c18SEric Sandeen */ 1686caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1687ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 168826092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 168926092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1690ac27a0ecSDave Kleikamp return 0; 1691ac27a0ecSDave Kleikamp } 1692ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1693262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1694262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1695262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1696262b4662SJan Kara "feature is enabled"); 1697262b4662SJan Kara return 0; 1698262b4662SJan Kara } 1699ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1700482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1701fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1702ac27a0ecSDave Kleikamp 1703482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1704fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1705ac27a0ecSDave Kleikamp 170656c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1707b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1708b31e1552SEric Sandeen "format mixing"); 1709ac27a0ecSDave Kleikamp return 0; 1710ac27a0ecSDave Kleikamp } 1711ac27a0ecSDave Kleikamp 1712ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1713b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1714b31e1552SEric Sandeen "not specified"); 1715ac27a0ecSDave Kleikamp return 0; 1716ac27a0ecSDave Kleikamp } 1717ac27a0ecSDave Kleikamp } else { 1718ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1719b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 17202c8be6b2SJan Kara "specified with no journaling " 1721b31e1552SEric Sandeen "enabled"); 1722ac27a0ecSDave Kleikamp return 0; 1723ac27a0ecSDave Kleikamp } 1724ac27a0ecSDave Kleikamp } 1725ac27a0ecSDave Kleikamp #endif 1726261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1727261cb20cSJan Kara int blocksize = 1728261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1729261cb20cSJan Kara 1730261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1731261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1732261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1733261cb20cSJan Kara return 0; 1734261cb20cSJan Kara } 1735261cb20cSJan Kara } 1736ac27a0ecSDave Kleikamp return 1; 1737ac27a0ecSDave Kleikamp } 1738ac27a0ecSDave Kleikamp 17392adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17402adf6da8STheodore Ts'o struct super_block *sb) 17412adf6da8STheodore Ts'o { 17422adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17432adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17442adf6da8STheodore Ts'o 17452adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17462adf6da8STheodore Ts'o char *fmtname = ""; 17472adf6da8STheodore Ts'o 17482adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17492adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17502adf6da8STheodore Ts'o fmtname = "vfsold"; 17512adf6da8STheodore Ts'o break; 17522adf6da8STheodore Ts'o case QFMT_VFS_V0: 17532adf6da8STheodore Ts'o fmtname = "vfsv0"; 17542adf6da8STheodore Ts'o break; 17552adf6da8STheodore Ts'o case QFMT_VFS_V1: 17562adf6da8STheodore Ts'o fmtname = "vfsv1"; 17572adf6da8STheodore Ts'o break; 17582adf6da8STheodore Ts'o } 17592adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17602adf6da8STheodore Ts'o } 17612adf6da8STheodore Ts'o 17622adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17632adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17642adf6da8STheodore Ts'o 17652adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17662adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17672adf6da8STheodore Ts'o #endif 17682adf6da8STheodore Ts'o } 17692adf6da8STheodore Ts'o 17705a916be1STheodore Ts'o static const char *token2str(int token) 17715a916be1STheodore Ts'o { 177250df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17735a916be1STheodore Ts'o 17745a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17755a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17765a916be1STheodore Ts'o break; 17775a916be1STheodore Ts'o return t->pattern; 17785a916be1STheodore Ts'o } 17795a916be1STheodore Ts'o 17802adf6da8STheodore Ts'o /* 17812adf6da8STheodore Ts'o * Show an option if 17822adf6da8STheodore Ts'o * - it's set to a non-default value OR 17832adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17842adf6da8STheodore Ts'o */ 178566acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 178666acdcf4STheodore Ts'o int nodefs) 17872adf6da8STheodore Ts'o { 17882adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17892adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 179066acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17915a916be1STheodore Ts'o const struct mount_opts *m; 179266acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17932adf6da8STheodore Ts'o 179466acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 179566acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17962adf6da8STheodore Ts'o 17972adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17985a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17995a916be1STheodore Ts'o 18005a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 18015a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 18025a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 18035a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 18045a916be1STheodore Ts'o continue; 180566acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 18065a916be1STheodore Ts'o continue; /* skip if same as the default */ 18075a916be1STheodore Ts'o if ((want_set && 18085a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 18095a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 18105a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 18115a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 18125a916be1STheodore Ts'o } 18135a916be1STheodore Ts'o 181408cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 18155a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 181608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 181708cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 181808cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 18195a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 182008cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 182108cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 182266acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 18235a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18245a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18252adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18265a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18272adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18285a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 182966acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18305a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 183166acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18325a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 183366acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18345a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18352adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18365a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 183766acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18385a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 183966acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18402adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18415a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18422adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18435a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18442adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18455a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18465a916be1STheodore Ts'o } 184766acdcf4STheodore Ts'o if (nodefs || 184866acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18495a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18502adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18512adf6da8STheodore Ts'o 185266acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 185366acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18545a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1855df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1856df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18572adf6da8STheodore Ts'o 18582adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18592adf6da8STheodore Ts'o return 0; 18602adf6da8STheodore Ts'o } 18612adf6da8STheodore Ts'o 186266acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 186366acdcf4STheodore Ts'o { 186466acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 186566acdcf4STheodore Ts'o } 186666acdcf4STheodore Ts'o 186766acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 186866acdcf4STheodore Ts'o { 186966acdcf4STheodore Ts'o struct super_block *sb = seq->private; 187066acdcf4STheodore Ts'o int rc; 187166acdcf4STheodore Ts'o 187266acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 187366acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 187466acdcf4STheodore Ts'o seq_puts(seq, "\n"); 187566acdcf4STheodore Ts'o return rc; 187666acdcf4STheodore Ts'o } 187766acdcf4STheodore Ts'o 187866acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 187966acdcf4STheodore Ts'o { 1880d9dda78bSAl Viro return single_open(file, options_seq_show, PDE_DATA(inode)); 188166acdcf4STheodore Ts'o } 188266acdcf4STheodore Ts'o 188366acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 188466acdcf4STheodore Ts'o .owner = THIS_MODULE, 188566acdcf4STheodore Ts'o .open = options_open_fs, 188666acdcf4STheodore Ts'o .read = seq_read, 188766acdcf4STheodore Ts'o .llseek = seq_lseek, 188866acdcf4STheodore Ts'o .release = single_release, 188966acdcf4STheodore Ts'o }; 189066acdcf4STheodore Ts'o 1891617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1892ac27a0ecSDave Kleikamp int read_only) 1893ac27a0ecSDave Kleikamp { 1894617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1895ac27a0ecSDave Kleikamp int res = 0; 1896ac27a0ecSDave Kleikamp 1897617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1898b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1899b31e1552SEric Sandeen "forcing read-only mode"); 1900ac27a0ecSDave Kleikamp res = MS_RDONLY; 1901ac27a0ecSDave Kleikamp } 1902ac27a0ecSDave Kleikamp if (read_only) 1903281b5995STheodore Ts'o goto done; 1904617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1905b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1906b31e1552SEric Sandeen "running e2fsck is recommended"); 1907617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1908b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1909b31e1552SEric Sandeen "warning: mounting fs with errors, " 1910b31e1552SEric Sandeen "running e2fsck is recommended"); 1911ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1912ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1913ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1914b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1915b31e1552SEric Sandeen "warning: maximal mount count reached, " 1916b31e1552SEric Sandeen "running e2fsck is recommended"); 1917ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1918ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1919ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1920b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1921b31e1552SEric Sandeen "warning: checktime reached, " 1922b31e1552SEric Sandeen "running e2fsck is recommended"); 19230390131bSFrank Mayhar if (!sbi->s_journal) 1924216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1925ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1926617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1927e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1928ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1929617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19300390131bSFrank Mayhar if (sbi->s_journal) 1931617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1932ac27a0ecSDave Kleikamp 1933e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1934281b5995STheodore Ts'o done: 1935ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1936a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1937a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1938ac27a0ecSDave Kleikamp sb->s_blocksize, 1939ac27a0ecSDave Kleikamp sbi->s_groups_count, 1940617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1941617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1942a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1943ac27a0ecSDave Kleikamp 19447abc52c2SDan Magenheimer cleancache_init_fs(sb); 1945ac27a0ecSDave Kleikamp return res; 1946ac27a0ecSDave Kleikamp } 1947ac27a0ecSDave Kleikamp 1948117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1949117fff10STheodore Ts'o { 1950117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1951117fff10STheodore Ts'o struct flex_groups *new_groups; 1952117fff10STheodore Ts'o int size; 1953117fff10STheodore Ts'o 1954117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1955117fff10STheodore Ts'o return 0; 1956117fff10STheodore Ts'o 1957117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1958117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1959117fff10STheodore Ts'o return 0; 1960117fff10STheodore Ts'o 1961117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1962117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1963117fff10STheodore Ts'o if (!new_groups) { 1964117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1965117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1966117fff10STheodore Ts'o return -ENOMEM; 1967117fff10STheodore Ts'o } 1968117fff10STheodore Ts'o 1969117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1970117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1971117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1972117fff10STheodore Ts'o sizeof(struct flex_groups))); 1973117fff10STheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 1974117fff10STheodore Ts'o } 1975117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1976117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1977117fff10STheodore Ts'o return 0; 1978117fff10STheodore Ts'o } 1979117fff10STheodore Ts'o 1980772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1981772cb7c8SJose R. Santos { 1982772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1983772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1984772cb7c8SJose R. Santos ext4_group_t flex_group; 1985117fff10STheodore Ts'o int i, err; 1986772cb7c8SJose R. Santos 1987503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1988d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1989772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1990772cb7c8SJose R. Santos return 1; 1991772cb7c8SJose R. Santos } 1992772cb7c8SJose R. Santos 1993117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1994117fff10STheodore Ts'o if (err) 1995772cb7c8SJose R. Santos goto failed; 1996772cb7c8SJose R. Santos 1997772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 199888b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1999772cb7c8SJose R. Santos 2000772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 20017ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 20027ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 200390ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 200424aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 20057ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 20067ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2007772cb7c8SJose R. Santos } 2008772cb7c8SJose R. Santos 2009772cb7c8SJose R. Santos return 1; 2010772cb7c8SJose R. Santos failed: 2011772cb7c8SJose R. Santos return 0; 2012772cb7c8SJose R. Santos } 2013772cb7c8SJose R. Santos 2014feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 2015717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2016717d50e4SAndreas Dilger { 2017feb0ab32SDarrick J. Wong int offset; 2018717d50e4SAndreas Dilger __u16 crc = 0; 2019717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2020717d50e4SAndreas Dilger 2021feb0ab32SDarrick J. Wong if ((sbi->s_es->s_feature_ro_compat & 2022feb0ab32SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { 2023feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2024d6a77105STheodore Ts'o __le16 save_csum; 2025feb0ab32SDarrick J. Wong __u32 csum32; 2026feb0ab32SDarrick J. Wong 2027d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 2028feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 2029feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2030feb0ab32SDarrick J. Wong sizeof(le_group)); 2031feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2032feb0ab32SDarrick J. Wong sbi->s_desc_size); 2033d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 2034feb0ab32SDarrick J. Wong 2035feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2036feb0ab32SDarrick J. Wong goto out; 2037feb0ab32SDarrick J. Wong } 2038feb0ab32SDarrick J. Wong 2039feb0ab32SDarrick J. Wong /* old crc16 code */ 2040feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2041feb0ab32SDarrick J. Wong 2042717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2043717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2044717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2045717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2046717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2047717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2048717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2049717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2050717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2051717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2052717d50e4SAndreas Dilger offset); 2053717d50e4SAndreas Dilger 2054feb0ab32SDarrick J. Wong out: 2055717d50e4SAndreas Dilger return cpu_to_le16(crc); 2056717d50e4SAndreas Dilger } 2057717d50e4SAndreas Dilger 2058feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2059717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2060717d50e4SAndreas Dilger { 2061feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2062feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2063feb0ab32SDarrick J. Wong block_group, gdp))) 2064717d50e4SAndreas Dilger return 0; 2065717d50e4SAndreas Dilger 2066717d50e4SAndreas Dilger return 1; 2067717d50e4SAndreas Dilger } 2068717d50e4SAndreas Dilger 2069feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2070feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2071feb0ab32SDarrick J. Wong { 2072feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2073feb0ab32SDarrick J. Wong return; 2074feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2075feb0ab32SDarrick J. Wong } 2076feb0ab32SDarrick J. Wong 2077ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2078bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2079bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2080ac27a0ecSDave Kleikamp { 2081617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2082617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2083617ba13bSMingming Cao ext4_fsblk_t last_block; 2084bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2085bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2086bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2087ce421581SJose R. Santos int flexbg_flag = 0; 2088bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2089ac27a0ecSDave Kleikamp 2090ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2091ce421581SJose R. Santos flexbg_flag = 1; 2092ce421581SJose R. Santos 2093617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2094ac27a0ecSDave Kleikamp 2095197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2096197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2097197cd65aSAkinobu Mita 2098ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2099bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2100ac27a0ecSDave Kleikamp else 2101ac27a0ecSDave Kleikamp last_block = first_block + 2102617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2103ac27a0ecSDave Kleikamp 2104bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2105bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2106bfff6873SLukas Czerner grp = i; 2107bfff6873SLukas Czerner 21088fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 21092b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2110b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2111a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2112b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2113ac27a0ecSDave Kleikamp return 0; 2114ac27a0ecSDave Kleikamp } 21158fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 21162b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2117b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2118a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2119b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2120ac27a0ecSDave Kleikamp return 0; 2121ac27a0ecSDave Kleikamp } 21228fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2123bd81d8eeSLaurent Vivier if (inode_table < first_block || 21242b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2125b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2126a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2127b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2128ac27a0ecSDave Kleikamp return 0; 2129ac27a0ecSDave Kleikamp } 2130955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2131feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2132b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2133b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2134fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2135fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21367ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2137955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2138717d50e4SAndreas Dilger return 0; 2139717d50e4SAndreas Dilger } 21407ee1ec4cSLi Zefan } 2141955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2142ce421581SJose R. Santos if (!flexbg_flag) 2143617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2144ac27a0ecSDave Kleikamp } 2145bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2146bfff6873SLukas Czerner *first_not_zeroed = grp; 2147ac27a0ecSDave Kleikamp 21485dee5437STheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 21495dee5437STheodore Ts'o EXT4_C2B(sbi, ext4_count_free_clusters(sb))); 2150617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2151ac27a0ecSDave Kleikamp return 1; 2152ac27a0ecSDave Kleikamp } 2153ac27a0ecSDave Kleikamp 2154617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2155ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2156ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2157ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2158ac27a0ecSDave Kleikamp * 2159ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2160ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2161ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2162ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2163ac27a0ecSDave Kleikamp * 2164ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2165ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2166ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2167617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2168ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2169ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2170ac27a0ecSDave Kleikamp */ 2171617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2172617ba13bSMingming Cao struct ext4_super_block *es) 2173ac27a0ecSDave Kleikamp { 2174ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2175ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2176ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2177ac27a0ecSDave Kleikamp int i; 2178ac27a0ecSDave Kleikamp #endif 2179ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2180ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2181ac27a0ecSDave Kleikamp return; 2182ac27a0ecSDave Kleikamp } 2183ac27a0ecSDave Kleikamp 2184a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2185b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2186b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2187a8f48a95SEric Sandeen return; 2188a8f48a95SEric Sandeen } 2189a8f48a95SEric Sandeen 2190d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2191d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2192d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2193d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2194d39195c3SAmir Goldstein return; 2195d39195c3SAmir Goldstein } 2196d39195c3SAmir Goldstein 2197617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2198c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2199c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 2200ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2201ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2202ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2203c25f9bc6SEric Sandeen } 2204ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2205ac27a0ecSDave Kleikamp return; 2206ac27a0ecSDave Kleikamp } 2207ac27a0ecSDave Kleikamp 2208ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2209b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2210ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2211ac27a0ecSDave Kleikamp } 2212ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2213ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2214ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2215ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2216ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2217617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2218617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2219ac27a0ecSDave Kleikamp if (ret < 0) 2220b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2221b31e1552SEric Sandeen "Cannot turn on journaled " 2222b31e1552SEric Sandeen "quota: error %d", ret); 2223ac27a0ecSDave Kleikamp } 2224ac27a0ecSDave Kleikamp } 2225ac27a0ecSDave Kleikamp #endif 2226ac27a0ecSDave Kleikamp 2227ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2228ac27a0ecSDave Kleikamp struct inode *inode; 2229ac27a0ecSDave Kleikamp 223097bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 223197bd42b9SJosef Bacik if (IS_ERR(inode)) { 2232ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2233ac27a0ecSDave Kleikamp break; 2234ac27a0ecSDave Kleikamp } 2235ac27a0ecSDave Kleikamp 2236617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2237871a2931SChristoph Hellwig dquot_initialize(inode); 2238ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2239566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2240b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2241b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 224246e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2243e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2244ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2245721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 224655f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2247617ba13bSMingming Cao ext4_truncate(inode); 2248721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2249ac27a0ecSDave Kleikamp nr_truncates++; 2250ac27a0ecSDave Kleikamp } else { 2251566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2252b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2253b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 225446e665e9SHarvey Harrison __func__, inode->i_ino); 2255ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2256ac27a0ecSDave Kleikamp inode->i_ino); 2257ac27a0ecSDave Kleikamp nr_orphans++; 2258ac27a0ecSDave Kleikamp } 2259ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2260ac27a0ecSDave Kleikamp } 2261ac27a0ecSDave Kleikamp 2262ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2263ac27a0ecSDave Kleikamp 2264ac27a0ecSDave Kleikamp if (nr_orphans) 2265b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2266b31e1552SEric Sandeen PLURAL(nr_orphans)); 2267ac27a0ecSDave Kleikamp if (nr_truncates) 2268b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2269b31e1552SEric Sandeen PLURAL(nr_truncates)); 2270ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2271ac27a0ecSDave Kleikamp /* Turn quotas off */ 2272ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2273ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2274287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2275ac27a0ecSDave Kleikamp } 2276ac27a0ecSDave Kleikamp #endif 2277ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2278ac27a0ecSDave Kleikamp } 22790b8e58a1SAndreas Dilger 2280cd2291a4SEric Sandeen /* 2281cd2291a4SEric Sandeen * Maximal extent format file size. 2282cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2283cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2284cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2285cd2291a4SEric Sandeen * so that won't be a limiting factor. 2286cd2291a4SEric Sandeen * 2287f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2288f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2289f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2290f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2291f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2292f17722f9SLukas Czerner * 2293cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2294cd2291a4SEric Sandeen */ 2295f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2296cd2291a4SEric Sandeen { 2297cd2291a4SEric Sandeen loff_t res; 2298cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2299cd2291a4SEric Sandeen 2300cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2301f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2302cd2291a4SEric Sandeen /* 230390c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2304cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2305cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2306cd2291a4SEric Sandeen */ 2307cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2308cd2291a4SEric Sandeen 2309cd2291a4SEric Sandeen /* total blocks in file system block size */ 2310cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2311cd2291a4SEric Sandeen upper_limit <<= blkbits; 2312cd2291a4SEric Sandeen } 2313cd2291a4SEric Sandeen 2314f17722f9SLukas Czerner /* 2315f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2316f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2317f17722f9SLukas Czerner * size 2318f17722f9SLukas Czerner */ 2319f17722f9SLukas Czerner res = (1LL << 32) - 1; 2320cd2291a4SEric Sandeen res <<= blkbits; 2321cd2291a4SEric Sandeen 2322cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2323cd2291a4SEric Sandeen if (res > upper_limit) 2324cd2291a4SEric Sandeen res = upper_limit; 2325cd2291a4SEric Sandeen 2326cd2291a4SEric Sandeen return res; 2327cd2291a4SEric Sandeen } 2328ac27a0ecSDave Kleikamp 2329ac27a0ecSDave Kleikamp /* 2330cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23310fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23320fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2333ac27a0ecSDave Kleikamp */ 2334f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2335ac27a0ecSDave Kleikamp { 2336617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23370fc1b451SAneesh Kumar K.V int meta_blocks; 23380fc1b451SAneesh Kumar K.V loff_t upper_limit; 23390b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23400b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23410b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23420b8e58a1SAndreas Dilger * 23430b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23440b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23450fc1b451SAneesh Kumar K.V */ 23460fc1b451SAneesh Kumar K.V 2347f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23480fc1b451SAneesh Kumar K.V /* 234990c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23500b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23510b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23520fc1b451SAneesh Kumar K.V */ 23530fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23540fc1b451SAneesh Kumar K.V 23550fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23560fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23570fc1b451SAneesh Kumar K.V 23580fc1b451SAneesh Kumar K.V } else { 23598180a562SAneesh Kumar K.V /* 23608180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23618180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23628180a562SAneesh Kumar K.V * represent total number of blocks in 23638180a562SAneesh Kumar K.V * file system block size 23648180a562SAneesh Kumar K.V */ 23650fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23660fc1b451SAneesh Kumar K.V 23670fc1b451SAneesh Kumar K.V } 23680fc1b451SAneesh Kumar K.V 23690fc1b451SAneesh Kumar K.V /* indirect blocks */ 23700fc1b451SAneesh Kumar K.V meta_blocks = 1; 23710fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23720fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23730fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23740fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23750fc1b451SAneesh Kumar K.V 23760fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23770fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2378ac27a0ecSDave Kleikamp 2379ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2380ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2381ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2382ac27a0ecSDave Kleikamp res <<= bits; 2383ac27a0ecSDave Kleikamp if (res > upper_limit) 2384ac27a0ecSDave Kleikamp res = upper_limit; 23850fc1b451SAneesh Kumar K.V 23860fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23870fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23880fc1b451SAneesh Kumar K.V 2389ac27a0ecSDave Kleikamp return res; 2390ac27a0ecSDave Kleikamp } 2391ac27a0ecSDave Kleikamp 2392617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 239370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2394ac27a0ecSDave Kleikamp { 2395617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2396fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2397ac27a0ecSDave Kleikamp int has_super = 0; 2398ac27a0ecSDave Kleikamp 2399ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2400ac27a0ecSDave Kleikamp 2401617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2402ac27a0ecSDave Kleikamp nr < first_meta_bg) 240370bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2404ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2405617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2406ac27a0ecSDave Kleikamp has_super = 1; 24070b8e58a1SAndreas Dilger 2408*bd63f6b0SDarrick J. Wong /* 2409*bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2410*bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2411*bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2412*bd63f6b0SDarrick J. Wong * compensate. 2413*bd63f6b0SDarrick J. Wong */ 2414*bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2415*bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2416*bd63f6b0SDarrick J. Wong has_super++; 2417*bd63f6b0SDarrick J. Wong 2418617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2419ac27a0ecSDave Kleikamp } 2420ac27a0ecSDave Kleikamp 2421c9de560dSAlex Tomas /** 2422c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2423c9de560dSAlex Tomas * @sbi: In memory super block info 2424c9de560dSAlex Tomas * 2425c9de560dSAlex Tomas * If we have specified it via mount option, then 2426c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2427c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2428c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2429c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2430c9de560dSAlex Tomas * 2431c9de560dSAlex Tomas */ 2432c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2433c9de560dSAlex Tomas { 2434c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2435c9de560dSAlex Tomas unsigned long stripe_width = 2436c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24373eb08658SDan Ehrenberg int ret; 2438c9de560dSAlex Tomas 2439c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24403eb08658SDan Ehrenberg ret = sbi->s_stripe; 24413eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24423eb08658SDan Ehrenberg ret = stripe_width; 24433eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24443eb08658SDan Ehrenberg ret = stride; 24453eb08658SDan Ehrenberg else 24463eb08658SDan Ehrenberg ret = 0; 2447c9de560dSAlex Tomas 24483eb08658SDan Ehrenberg /* 24493eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24503eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24513eb08658SDan Ehrenberg */ 24523eb08658SDan Ehrenberg if (ret <= 1) 24533eb08658SDan Ehrenberg ret = 0; 2454c9de560dSAlex Tomas 24553eb08658SDan Ehrenberg return ret; 2456c9de560dSAlex Tomas } 2457ac27a0ecSDave Kleikamp 24583197ebdbSTheodore Ts'o /* sysfs supprt */ 24593197ebdbSTheodore Ts'o 24603197ebdbSTheodore Ts'o struct ext4_attr { 24613197ebdbSTheodore Ts'o struct attribute attr; 24623197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24633197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24643197ebdbSTheodore Ts'o const char *, size_t); 2465f2d50a65SJan Kara union { 24663197ebdbSTheodore Ts'o int offset; 2467f2d50a65SJan Kara int deprecated_val; 2468f2d50a65SJan Kara } u; 24693197ebdbSTheodore Ts'o }; 24703197ebdbSTheodore Ts'o 247127dd4385SLukas Czerner static int parse_strtoull(const char *buf, 247227dd4385SLukas Czerner unsigned long long max, unsigned long long *value) 247327dd4385SLukas Czerner { 247427dd4385SLukas Czerner int ret; 247527dd4385SLukas Czerner 247627dd4385SLukas Czerner ret = kstrtoull(skip_spaces(buf), 0, value); 247727dd4385SLukas Czerner if (!ret && *value > max) 247827dd4385SLukas Czerner ret = -EINVAL; 247927dd4385SLukas Czerner return ret; 248027dd4385SLukas Czerner } 248127dd4385SLukas Czerner 24823197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24833197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24843197ebdbSTheodore Ts'o char *buf) 24853197ebdbSTheodore Ts'o { 24863197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24877b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24887b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24893197ebdbSTheodore Ts'o } 24903197ebdbSTheodore Ts'o 24913197ebdbSTheodore Ts'o static ssize_t session_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, "%lu\n", 24993197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 25003197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 25013197ebdbSTheodore Ts'o } 25023197ebdbSTheodore Ts'o 25033197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 25043197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25053197ebdbSTheodore Ts'o { 25063197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 25073197ebdbSTheodore Ts'o 2508f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2509f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 25103197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2511a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 25123197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2513a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 25143197ebdbSTheodore Ts'o } 25153197ebdbSTheodore Ts'o 25163197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 25173197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25183197ebdbSTheodore Ts'o const char *buf, size_t count) 25193197ebdbSTheodore Ts'o { 25203197ebdbSTheodore Ts'o unsigned long t; 2521e1091b15SLukas Czerner int ret; 25223197ebdbSTheodore Ts'o 2523e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2524e1091b15SLukas Czerner if (ret) 2525e1091b15SLukas Czerner return ret; 25263197ebdbSTheodore Ts'o 2527e1091b15SLukas Czerner if (t && (!is_power_of_2(t) || t > 0x40000000)) 25283197ebdbSTheodore Ts'o return -EINVAL; 25293197ebdbSTheodore Ts'o 25303197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 25313197ebdbSTheodore Ts'o return count; 25323197ebdbSTheodore Ts'o } 25333197ebdbSTheodore Ts'o 25343197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25353197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25363197ebdbSTheodore Ts'o { 2537f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25383197ebdbSTheodore Ts'o 25393197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25403197ebdbSTheodore Ts'o } 25413197ebdbSTheodore Ts'o 25423197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25433197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25443197ebdbSTheodore Ts'o const char *buf, size_t count) 25453197ebdbSTheodore Ts'o { 2546f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25473197ebdbSTheodore Ts'o unsigned long t; 2548e1091b15SLukas Czerner int ret; 25493197ebdbSTheodore Ts'o 2550e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2551e1091b15SLukas Czerner if (ret) 2552e1091b15SLukas Czerner return ret; 25533197ebdbSTheodore Ts'o *ui = t; 25543197ebdbSTheodore Ts'o return count; 25553197ebdbSTheodore Ts'o } 25563197ebdbSTheodore Ts'o 255727dd4385SLukas Czerner static ssize_t reserved_clusters_show(struct ext4_attr *a, 255827dd4385SLukas Czerner struct ext4_sb_info *sbi, char *buf) 255927dd4385SLukas Czerner { 256027dd4385SLukas Czerner return snprintf(buf, PAGE_SIZE, "%llu\n", 256127dd4385SLukas Czerner (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); 256227dd4385SLukas Czerner } 256327dd4385SLukas Czerner 256427dd4385SLukas Czerner static ssize_t reserved_clusters_store(struct ext4_attr *a, 256527dd4385SLukas Czerner struct ext4_sb_info *sbi, 256627dd4385SLukas Czerner const char *buf, size_t count) 256727dd4385SLukas Czerner { 256827dd4385SLukas Czerner unsigned long long val; 256927dd4385SLukas Czerner int ret; 257027dd4385SLukas Czerner 257127dd4385SLukas Czerner if (parse_strtoull(buf, -1ULL, &val)) 257227dd4385SLukas Czerner return -EINVAL; 257327dd4385SLukas Czerner ret = ext4_reserve_clusters(sbi, val); 257427dd4385SLukas Czerner 257527dd4385SLukas Czerner return ret ? ret : count; 257627dd4385SLukas Czerner } 257727dd4385SLukas Czerner 25782c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25792c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25802c0544b2STheodore Ts'o const char *buf, size_t count) 25812c0544b2STheodore Ts'o { 25822c0544b2STheodore Ts'o int len = count; 25832c0544b2STheodore Ts'o 25842c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25852c0544b2STheodore Ts'o return -EPERM; 25862c0544b2STheodore Ts'o 25872c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25882c0544b2STheodore Ts'o len--; 25892c0544b2STheodore Ts'o 25902c0544b2STheodore Ts'o if (len) 25912c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25922c0544b2STheodore Ts'o return count; 25932c0544b2STheodore Ts'o } 25942c0544b2STheodore Ts'o 2595f2d50a65SJan Kara static ssize_t sbi_deprecated_show(struct ext4_attr *a, 2596f2d50a65SJan Kara struct ext4_sb_info *sbi, char *buf) 2597f2d50a65SJan Kara { 2598f2d50a65SJan Kara return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); 2599f2d50a65SJan Kara } 2600f2d50a65SJan Kara 26013197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 26023197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 26033197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 26043197ebdbSTheodore Ts'o .show = _show, \ 26053197ebdbSTheodore Ts'o .store = _store, \ 2606f2d50a65SJan Kara .u = { \ 26073197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname),\ 2608f2d50a65SJan Kara }, \ 26093197ebdbSTheodore Ts'o } 26103197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 26113197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 26123197ebdbSTheodore Ts'o 2613857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 26143197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 26153197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 26163197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 26173197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 26183197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 2619f2d50a65SJan Kara #define EXT4_DEPRECATED_ATTR(_name, _val) \ 2620f2d50a65SJan Kara static struct ext4_attr ext4_attr_##_name = { \ 2621f2d50a65SJan Kara .attr = {.name = __stringify(_name), .mode = 0444 }, \ 2622f2d50a65SJan Kara .show = sbi_deprecated_show, \ 2623f2d50a65SJan Kara .u = { \ 2624f2d50a65SJan Kara .deprecated_val = _val, \ 2625f2d50a65SJan Kara }, \ 2626f2d50a65SJan Kara } 26273197ebdbSTheodore Ts'o 26283197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 26293197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 26303197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 263127dd4385SLukas Czerner EXT4_RW_ATTR(reserved_clusters); 26323197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 26333197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 263411013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 26353197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 26363197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 26373197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 26383197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26393197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26403197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 2641f2d50a65SJan Kara EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); 264267a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 26432c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 2644efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 2645efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 2646efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 2647efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 2648efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 2649efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 26503197ebdbSTheodore Ts'o 26513197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26523197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26533197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26543197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 265527dd4385SLukas Czerner ATTR_LIST(reserved_clusters), 26563197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 265711013911SAndreas Dilger ATTR_LIST(inode_goal), 26583197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26593197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26603197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26613197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26623197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26633197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 266455138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 266567a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 26662c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 2667efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 2668efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_burst), 2669efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 2670efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 2671efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 2672efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 26733197ebdbSTheodore Ts'o NULL, 26743197ebdbSTheodore Ts'o }; 26753197ebdbSTheodore Ts'o 2676857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2677857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 267827ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 26795e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2680857ac889SLukas Czerner 2681857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2682857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 268327ee40dfSLukas Czerner ATTR_LIST(batched_discard), 26845e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2685857ac889SLukas Czerner NULL, 2686857ac889SLukas Czerner }; 2687857ac889SLukas Czerner 26883197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 26893197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 26903197ebdbSTheodore Ts'o { 26913197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26923197ebdbSTheodore Ts'o s_kobj); 26933197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26943197ebdbSTheodore Ts'o 26953197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 26963197ebdbSTheodore Ts'o } 26973197ebdbSTheodore Ts'o 26983197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 26993197ebdbSTheodore Ts'o struct attribute *attr, 27003197ebdbSTheodore Ts'o const char *buf, size_t len) 27013197ebdbSTheodore Ts'o { 27023197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27033197ebdbSTheodore Ts'o s_kobj); 27043197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27053197ebdbSTheodore Ts'o 27063197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 27073197ebdbSTheodore Ts'o } 27083197ebdbSTheodore Ts'o 27093197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 27103197ebdbSTheodore Ts'o { 27113197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27123197ebdbSTheodore Ts'o s_kobj); 27133197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 27143197ebdbSTheodore Ts'o } 27153197ebdbSTheodore Ts'o 271652cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 27173197ebdbSTheodore Ts'o .show = ext4_attr_show, 27183197ebdbSTheodore Ts'o .store = ext4_attr_store, 27193197ebdbSTheodore Ts'o }; 27203197ebdbSTheodore Ts'o 27213197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 27223197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 27233197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 27243197ebdbSTheodore Ts'o .release = ext4_sb_release, 27253197ebdbSTheodore Ts'o }; 27263197ebdbSTheodore Ts'o 2727857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2728857ac889SLukas Czerner { 2729857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2730857ac889SLukas Czerner } 2731857ac889SLukas Czerner 2732857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2733857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2734857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2735857ac889SLukas Czerner .release = ext4_feat_release, 2736857ac889SLukas Czerner }; 2737857ac889SLukas Czerner 2738a13fb1a4SEric Sandeen /* 2739a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2740a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2741a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2742a13fb1a4SEric Sandeen * 0 if it cannot be. 2743a13fb1a4SEric Sandeen */ 2744a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2745a13fb1a4SEric Sandeen { 2746a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2747a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2748a13fb1a4SEric Sandeen "Couldn't mount because of " 2749a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2750a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2751a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2752a13fb1a4SEric Sandeen return 0; 2753a13fb1a4SEric Sandeen } 2754a13fb1a4SEric Sandeen 2755a13fb1a4SEric Sandeen if (readonly) 2756a13fb1a4SEric Sandeen return 1; 2757a13fb1a4SEric Sandeen 2758a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2759a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2760a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2761a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2762a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2763a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2764a13fb1a4SEric Sandeen return 0; 2765a13fb1a4SEric Sandeen } 2766a13fb1a4SEric Sandeen /* 2767a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2768a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2769a13fb1a4SEric Sandeen */ 2770a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2771a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2772a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2773a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2774a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2775a13fb1a4SEric Sandeen return 0; 2776a13fb1a4SEric Sandeen } 2777a13fb1a4SEric Sandeen } 2778bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2779bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2780bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2781bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2782bab08ab9STheodore Ts'o "extents feature\n"); 2783bab08ab9STheodore Ts'o return 0; 2784bab08ab9STheodore Ts'o } 27857c319d32SAditya Kali 27867c319d32SAditya Kali #ifndef CONFIG_QUOTA 27877c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 27887c319d32SAditya Kali !readonly) { 27897c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 27907c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 27917c319d32SAditya Kali "without CONFIG_QUOTA"); 27927c319d32SAditya Kali return 0; 27937c319d32SAditya Kali } 27947c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2795a13fb1a4SEric Sandeen return 1; 2796a13fb1a4SEric Sandeen } 2797a13fb1a4SEric Sandeen 279866e61a9eSTheodore Ts'o /* 279966e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 280066e61a9eSTheodore Ts'o * on the file system 280166e61a9eSTheodore Ts'o */ 280266e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 280366e61a9eSTheodore Ts'o { 280466e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 280566e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 280666e61a9eSTheodore Ts'o struct ext4_super_block *es; 280766e61a9eSTheodore Ts'o 280866e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 280966e61a9eSTheodore Ts'o es = sbi->s_es; 281066e61a9eSTheodore Ts'o 281166e61a9eSTheodore Ts'o if (es->s_error_count) 281266e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 281366e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 281466e61a9eSTheodore Ts'o if (es->s_first_error_time) { 281566e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 281666e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 281766e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 281866e61a9eSTheodore Ts'o es->s_first_error_func, 281966e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 282066e61a9eSTheodore Ts'o if (es->s_first_error_ino) 282166e61a9eSTheodore Ts'o printk(": inode %u", 282266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 282366e61a9eSTheodore Ts'o if (es->s_first_error_block) 282466e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 282566e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 282666e61a9eSTheodore Ts'o printk("\n"); 282766e61a9eSTheodore Ts'o } 282866e61a9eSTheodore Ts'o if (es->s_last_error_time) { 282966e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 283066e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 283166e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 283266e61a9eSTheodore Ts'o es->s_last_error_func, 283366e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 283466e61a9eSTheodore Ts'o if (es->s_last_error_ino) 283566e61a9eSTheodore Ts'o printk(": inode %u", 283666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 283766e61a9eSTheodore Ts'o if (es->s_last_error_block) 283866e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 283966e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 284066e61a9eSTheodore Ts'o printk("\n"); 284166e61a9eSTheodore Ts'o } 284266e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 284366e61a9eSTheodore Ts'o } 284466e61a9eSTheodore Ts'o 2845bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2846bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2847bfff6873SLukas Czerner { 2848bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2849bfff6873SLukas Czerner ext4_group_t group, ngroups; 2850bfff6873SLukas Czerner struct super_block *sb; 2851bfff6873SLukas Czerner unsigned long timeout = 0; 2852bfff6873SLukas Czerner int ret = 0; 2853bfff6873SLukas Czerner 2854bfff6873SLukas Czerner sb = elr->lr_super; 2855bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2856bfff6873SLukas Czerner 28578e8ad8a5SJan Kara sb_start_write(sb); 2858bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2859bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2860bfff6873SLukas Czerner if (!gdp) { 2861bfff6873SLukas Czerner ret = 1; 2862bfff6873SLukas Czerner break; 2863bfff6873SLukas Czerner } 2864bfff6873SLukas Czerner 2865bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2866bfff6873SLukas Czerner break; 2867bfff6873SLukas Czerner } 2868bfff6873SLukas Czerner 28697f511862STheodore Ts'o if (group >= ngroups) 2870bfff6873SLukas Czerner ret = 1; 2871bfff6873SLukas Czerner 2872bfff6873SLukas Czerner if (!ret) { 2873bfff6873SLukas Czerner timeout = jiffies; 2874bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2875bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2876bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 287751ce6511SLukas Czerner timeout = (jiffies - timeout) * 287851ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2879bfff6873SLukas Czerner elr->lr_timeout = timeout; 2880bfff6873SLukas Czerner } 2881bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2882bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2883bfff6873SLukas Czerner } 28848e8ad8a5SJan Kara sb_end_write(sb); 2885bfff6873SLukas Czerner 2886bfff6873SLukas Czerner return ret; 2887bfff6873SLukas Czerner } 2888bfff6873SLukas Czerner 2889bfff6873SLukas Czerner /* 2890bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 28914ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2892bfff6873SLukas Czerner */ 2893bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2894bfff6873SLukas Czerner { 2895bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2896bfff6873SLukas Czerner 2897bfff6873SLukas Czerner if (!elr) 2898bfff6873SLukas Czerner return; 2899bfff6873SLukas Czerner 2900bfff6873SLukas Czerner sbi = elr->lr_sbi; 2901bfff6873SLukas Czerner 2902bfff6873SLukas Czerner list_del(&elr->lr_request); 2903bfff6873SLukas Czerner sbi->s_li_request = NULL; 2904bfff6873SLukas Czerner kfree(elr); 2905bfff6873SLukas Czerner } 2906bfff6873SLukas Czerner 2907bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2908bfff6873SLukas Czerner { 29091bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29101bb933fbSLukas Czerner if (!ext4_li_info) { 29111bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2912bfff6873SLukas Czerner return; 29131bb933fbSLukas Czerner } 2914bfff6873SLukas Czerner 2915bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29161bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2917bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29181bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2919bfff6873SLukas Czerner } 2920bfff6873SLukas Czerner 29218f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29228f1f7453SEric Sandeen 2923bfff6873SLukas Czerner /* 2924bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2925bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2926bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2927bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2928bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2929bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2930bfff6873SLukas Czerner * next waking time and put itself into sleep. 2931bfff6873SLukas Czerner */ 2932bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2933bfff6873SLukas Czerner { 2934bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2935bfff6873SLukas Czerner struct list_head *pos, *n; 2936bfff6873SLukas Czerner struct ext4_li_request *elr; 29374ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2938bfff6873SLukas Czerner 2939bfff6873SLukas Czerner BUG_ON(NULL == eli); 2940bfff6873SLukas Czerner 2941bfff6873SLukas Czerner cont_thread: 2942bfff6873SLukas Czerner while (true) { 2943bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2944bfff6873SLukas Czerner 2945bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2946bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2947bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2948bfff6873SLukas Czerner goto exit_thread; 2949bfff6873SLukas Czerner } 2950bfff6873SLukas Czerner 2951bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2952bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2953bfff6873SLukas Czerner lr_request); 2954bfff6873SLukas Czerner 2955b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2956b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2957b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2958bfff6873SLukas Czerner ext4_remove_li_request(elr); 2959bfff6873SLukas Czerner continue; 2960bfff6873SLukas Czerner } 2961b2c78cd0STheodore Ts'o } 2962bfff6873SLukas Czerner 2963bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2964bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2965bfff6873SLukas Czerner } 2966bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2967bfff6873SLukas Czerner 2968a0acae0eSTejun Heo try_to_freeze(); 2969bfff6873SLukas Czerner 29704ed5c033SLukas Czerner cur = jiffies; 29714ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2972f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2973bfff6873SLukas Czerner cond_resched(); 2974bfff6873SLukas Czerner continue; 2975bfff6873SLukas Czerner } 2976bfff6873SLukas Czerner 29774ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 29784ed5c033SLukas Czerner 29798f1f7453SEric Sandeen if (kthread_should_stop()) { 29808f1f7453SEric Sandeen ext4_clear_request_list(); 29818f1f7453SEric Sandeen goto exit_thread; 29828f1f7453SEric Sandeen } 2983bfff6873SLukas Czerner } 2984bfff6873SLukas Czerner 2985bfff6873SLukas Czerner exit_thread: 2986bfff6873SLukas Czerner /* 2987bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2988bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2989bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2990bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2991bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2992bfff6873SLukas Czerner * new one. 2993bfff6873SLukas Czerner */ 2994bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2995bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2996bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2997bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2998bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2999bfff6873SLukas Czerner goto cont_thread; 3000bfff6873SLukas Czerner } 3001bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3002bfff6873SLukas Czerner kfree(ext4_li_info); 3003bfff6873SLukas Czerner ext4_li_info = NULL; 3004bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3005bfff6873SLukas Czerner 3006bfff6873SLukas Czerner return 0; 3007bfff6873SLukas Czerner } 3008bfff6873SLukas Czerner 3009bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3010bfff6873SLukas Czerner { 3011bfff6873SLukas Czerner struct list_head *pos, *n; 3012bfff6873SLukas Czerner struct ext4_li_request *elr; 3013bfff6873SLukas Czerner 3014bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3015bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3016bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3017bfff6873SLukas Czerner lr_request); 3018bfff6873SLukas Czerner ext4_remove_li_request(elr); 3019bfff6873SLukas Czerner } 3020bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3021bfff6873SLukas Czerner } 3022bfff6873SLukas Czerner 3023bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3024bfff6873SLukas Czerner { 30258f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30268f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30278f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30288f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3029bfff6873SLukas Czerner ext4_clear_request_list(); 3030bfff6873SLukas Czerner kfree(ext4_li_info); 3031bfff6873SLukas Czerner ext4_li_info = NULL; 303292b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3033bfff6873SLukas Czerner "initialization thread\n", 3034bfff6873SLukas Czerner err); 3035bfff6873SLukas Czerner return err; 3036bfff6873SLukas Czerner } 3037bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3038bfff6873SLukas Czerner return 0; 3039bfff6873SLukas Czerner } 3040bfff6873SLukas Czerner 3041bfff6873SLukas Czerner /* 3042bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3043bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3044bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3045bfff6873SLukas Czerner * groups and return total number of groups. 3046bfff6873SLukas Czerner */ 3047bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3048bfff6873SLukas Czerner { 3049bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3050bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3051bfff6873SLukas Czerner 3052bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3053bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3054bfff6873SLukas Czerner if (!gdp) 3055bfff6873SLukas Czerner continue; 3056bfff6873SLukas Czerner 3057bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3058bfff6873SLukas Czerner break; 3059bfff6873SLukas Czerner } 3060bfff6873SLukas Czerner 3061bfff6873SLukas Czerner return group; 3062bfff6873SLukas Czerner } 3063bfff6873SLukas Czerner 3064bfff6873SLukas Czerner static int ext4_li_info_new(void) 3065bfff6873SLukas Czerner { 3066bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3067bfff6873SLukas Czerner 3068bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3069bfff6873SLukas Czerner if (!eli) 3070bfff6873SLukas Czerner return -ENOMEM; 3071bfff6873SLukas Czerner 3072bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3073bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3074bfff6873SLukas Czerner 3075bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3076bfff6873SLukas Czerner 3077bfff6873SLukas Czerner ext4_li_info = eli; 3078bfff6873SLukas Czerner 3079bfff6873SLukas Czerner return 0; 3080bfff6873SLukas Czerner } 3081bfff6873SLukas Czerner 3082bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3083bfff6873SLukas Czerner ext4_group_t start) 3084bfff6873SLukas Czerner { 3085bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3086bfff6873SLukas Czerner struct ext4_li_request *elr; 3087bfff6873SLukas Czerner 3088bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3089bfff6873SLukas Czerner if (!elr) 3090bfff6873SLukas Czerner return NULL; 3091bfff6873SLukas Czerner 3092bfff6873SLukas Czerner elr->lr_super = sb; 3093bfff6873SLukas Czerner elr->lr_sbi = sbi; 3094bfff6873SLukas Czerner elr->lr_next_group = start; 3095bfff6873SLukas Czerner 3096bfff6873SLukas Czerner /* 3097bfff6873SLukas Czerner * Randomize first schedule time of the request to 3098bfff6873SLukas Czerner * spread the inode table initialization requests 3099bfff6873SLukas Czerner * better. 3100bfff6873SLukas Czerner */ 3101dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3102dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3103bfff6873SLukas Czerner return elr; 3104bfff6873SLukas Czerner } 3105bfff6873SLukas Czerner 31067f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3107bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3108bfff6873SLukas Czerner { 3109bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31107f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3111bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 31126c5a6cb9SAndrew Morton int ret = 0; 3113bfff6873SLukas Czerner 31147f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 311551ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 311651ce6511SLukas Czerner /* 311751ce6511SLukas Czerner * Reset timeout so it can be computed again, because 311851ce6511SLukas Czerner * s_li_wait_mult might have changed. 311951ce6511SLukas Czerner */ 312051ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31217f511862STheodore Ts'o goto out; 312251ce6511SLukas Czerner } 3123bfff6873SLukas Czerner 3124bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3125bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 312655ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31277f511862STheodore Ts'o goto out; 3128bfff6873SLukas Czerner 3129bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31307f511862STheodore Ts'o if (!elr) { 31317f511862STheodore Ts'o ret = -ENOMEM; 31327f511862STheodore Ts'o goto out; 31337f511862STheodore Ts'o } 3134bfff6873SLukas Czerner 3135bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3136bfff6873SLukas Czerner ret = ext4_li_info_new(); 3137bfff6873SLukas Czerner if (ret) 3138bfff6873SLukas Czerner goto out; 3139bfff6873SLukas Czerner } 3140bfff6873SLukas Czerner 3141bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3142bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3143bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3144bfff6873SLukas Czerner 3145bfff6873SLukas Czerner sbi->s_li_request = elr; 314646e4690bSTao Ma /* 314746e4690bSTao Ma * set elr to NULL here since it has been inserted to 314846e4690bSTao Ma * the request_list and the removal and free of it is 314946e4690bSTao Ma * handled by ext4_clear_request_list from now on. 315046e4690bSTao Ma */ 315146e4690bSTao Ma elr = NULL; 3152bfff6873SLukas Czerner 3153bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3154bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3155bfff6873SLukas Czerner if (ret) 3156bfff6873SLukas Czerner goto out; 3157bfff6873SLukas Czerner } 3158bfff6873SLukas Czerner out: 3159bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3160beed5ecbSNicolas Kaiser if (ret) 3161bfff6873SLukas Czerner kfree(elr); 3162bfff6873SLukas Czerner return ret; 3163bfff6873SLukas Czerner } 3164bfff6873SLukas Czerner 3165bfff6873SLukas Czerner /* 3166bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3167bfff6873SLukas Czerner * module unload. 3168bfff6873SLukas Czerner */ 3169bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3170bfff6873SLukas Czerner { 3171bfff6873SLukas Czerner /* 3172bfff6873SLukas Czerner * If thread exited earlier 3173bfff6873SLukas Czerner * there's nothing to be done. 3174bfff6873SLukas Czerner */ 31758f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3176bfff6873SLukas Czerner return; 3177bfff6873SLukas Czerner 31788f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3179bfff6873SLukas Czerner } 3180bfff6873SLukas Czerner 318125ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 318225ed6e8aSDarrick J. Wong { 318325ed6e8aSDarrick J. Wong int ret = 1; 318425ed6e8aSDarrick J. Wong int compat, incompat; 318525ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 318625ed6e8aSDarrick J. Wong 318725ed6e8aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 318825ed6e8aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 318925ed6e8aSDarrick J. Wong /* journal checksum v2 */ 319025ed6e8aSDarrick J. Wong compat = 0; 319125ed6e8aSDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V2; 319225ed6e8aSDarrick J. Wong } else { 319325ed6e8aSDarrick J. Wong /* journal checksum v1 */ 319425ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 319525ed6e8aSDarrick J. Wong incompat = 0; 319625ed6e8aSDarrick J. Wong } 319725ed6e8aSDarrick J. Wong 319825ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 319925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 320025ed6e8aSDarrick J. Wong compat, 0, 320125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 320225ed6e8aSDarrick J. Wong incompat); 320325ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 320425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 320525ed6e8aSDarrick J. Wong compat, 0, 320625ed6e8aSDarrick J. Wong incompat); 320725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 320825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 320925ed6e8aSDarrick J. Wong } else { 321025ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 321125ed6e8aSDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 321225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 321325ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 321425ed6e8aSDarrick J. Wong } 321525ed6e8aSDarrick J. Wong 321625ed6e8aSDarrick J. Wong return ret; 321725ed6e8aSDarrick J. Wong } 321825ed6e8aSDarrick J. Wong 3219952fc18eSTheodore Ts'o /* 3220952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3221952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3222952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3223952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3224952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3225952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3226952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3227952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3228952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3229952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3230952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3231952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3232952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3233952fc18eSTheodore Ts'o */ 3234952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3235952fc18eSTheodore Ts'o char *buf) 3236952fc18eSTheodore Ts'o { 3237952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3238952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3239952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3240952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3241952fc18eSTheodore Ts'o int s, j, count = 0; 3242952fc18eSTheodore Ts'o 32430548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 32440548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32450548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32460548bbb8STheodore Ts'o 3247952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3248952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3249952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3250952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3251952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3252952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3253952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3254952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3255952fc18eSTheodore Ts'o count++; 3256952fc18eSTheodore Ts'o } 3257952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3258952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3259952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3260952fc18eSTheodore Ts'o count++; 3261952fc18eSTheodore Ts'o } 3262952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3263952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3264952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3265952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3266952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3267952fc18eSTheodore Ts'o count++; 3268952fc18eSTheodore Ts'o } 3269952fc18eSTheodore Ts'o if (i != grp) 3270952fc18eSTheodore Ts'o continue; 3271952fc18eSTheodore Ts'o s = 0; 3272952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3273952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3274952fc18eSTheodore Ts'o count++; 3275952fc18eSTheodore Ts'o } 3276952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3277952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3278952fc18eSTheodore Ts'o count++; 3279952fc18eSTheodore Ts'o } 3280952fc18eSTheodore Ts'o } 3281952fc18eSTheodore Ts'o if (!count) 3282952fc18eSTheodore Ts'o return 0; 3283952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3284952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3285952fc18eSTheodore Ts'o } 3286952fc18eSTheodore Ts'o 3287952fc18eSTheodore Ts'o /* 3288952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3289952fc18eSTheodore Ts'o */ 3290952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3291952fc18eSTheodore Ts'o { 3292952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3293952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3294952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3295952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3296952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3297952fc18eSTheodore Ts'o 3298952fc18eSTheodore Ts'o if (!buf) 3299952fc18eSTheodore Ts'o return -ENOMEM; 3300952fc18eSTheodore Ts'o 3301952fc18eSTheodore Ts'o /* 3302952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3303952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3304952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3305952fc18eSTheodore Ts'o */ 3306952fc18eSTheodore Ts'o 3307952fc18eSTheodore Ts'o /* 3308952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3309952fc18eSTheodore Ts'o */ 3310952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3311952fc18eSTheodore Ts'o 3312952fc18eSTheodore Ts'o /* 3313952fc18eSTheodore Ts'o * Add the overhead found in each block group 3314952fc18eSTheodore Ts'o */ 3315952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3316952fc18eSTheodore Ts'o int blks; 3317952fc18eSTheodore Ts'o 3318952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3319952fc18eSTheodore Ts'o overhead += blks; 3320952fc18eSTheodore Ts'o if (blks) 3321952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3322952fc18eSTheodore Ts'o cond_resched(); 3323952fc18eSTheodore Ts'o } 33240875a2b4SEric Sandeen /* Add the journal blocks as well */ 33250875a2b4SEric Sandeen if (sbi->s_journal) 3326810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33270875a2b4SEric Sandeen 3328952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3329952fc18eSTheodore Ts'o smp_wmb(); 3330952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3331952fc18eSTheodore Ts'o return 0; 3332952fc18eSTheodore Ts'o } 3333952fc18eSTheodore Ts'o 333427dd4385SLukas Czerner 333530fac0f7SJan Kara static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) 333627dd4385SLukas Czerner { 333727dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 333827dd4385SLukas Czerner 333927dd4385SLukas Czerner /* 334030fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 334130fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 334230fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 334330fac0f7SJan Kara * to keep ext2/3 backward compatibility. 334430fac0f7SJan Kara */ 334530fac0f7SJan Kara if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 334630fac0f7SJan Kara return 0; 334730fac0f7SJan Kara /* 334827dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 334927dd4385SLukas Czerner * This should cover the situations where we can not afford to run 335027dd4385SLukas Czerner * out of space like for example punch hole, or converting 3351556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 335227dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 335327dd4385SLukas Czerner * very rare. 335427dd4385SLukas Czerner */ 335530fac0f7SJan Kara resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> 335630fac0f7SJan Kara EXT4_SB(sb)->s_cluster_bits; 335727dd4385SLukas Czerner 335827dd4385SLukas Czerner do_div(resv_clusters, 50); 335927dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 336027dd4385SLukas Czerner 336127dd4385SLukas Czerner return resv_clusters; 336227dd4385SLukas Czerner } 336327dd4385SLukas Czerner 336427dd4385SLukas Czerner 336527dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) 336627dd4385SLukas Czerner { 336727dd4385SLukas Czerner ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> 336827dd4385SLukas Czerner sbi->s_cluster_bits; 336927dd4385SLukas Czerner 337027dd4385SLukas Czerner if (count >= clusters) 337127dd4385SLukas Czerner return -EINVAL; 337227dd4385SLukas Czerner 337327dd4385SLukas Czerner atomic64_set(&sbi->s_resv_clusters, count); 337427dd4385SLukas Czerner return 0; 337527dd4385SLukas Czerner } 337627dd4385SLukas Czerner 3377617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3378ac27a0ecSDave Kleikamp { 3379d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3380ac27a0ecSDave Kleikamp struct buffer_head *bh; 3381617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3382617ba13bSMingming Cao struct ext4_sb_info *sbi; 3383617ba13bSMingming Cao ext4_fsblk_t block; 3384617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 338570bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3386ac27a0ecSDave Kleikamp unsigned long offset = 0; 3387ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3388ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3389ac27a0ecSDave Kleikamp struct inode *root; 33909f6200bbSTheodore Ts'o char *cp; 33910390131bSFrank Mayhar const char *descr; 3392dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3393281b5995STheodore Ts'o int blocksize, clustersize; 33944ec11028STheodore Ts'o unsigned int db_count; 33954ec11028STheodore Ts'o unsigned int i; 3396281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3397bd81d8eeSLaurent Vivier __u64 blocks_count; 339807aa2ea1SLukas Czerner int err = 0; 3399b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3400bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3401ac27a0ecSDave Kleikamp 3402ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3403ac27a0ecSDave Kleikamp if (!sbi) 3404dcc7dae3SCyrill Gorcunov goto out_free_orig; 3405705895b6SPekka Enberg 3406705895b6SPekka Enberg sbi->s_blockgroup_lock = 3407705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3408705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3409705895b6SPekka Enberg kfree(sbi); 3410dcc7dae3SCyrill Gorcunov goto out_free_orig; 3411705895b6SPekka Enberg } 3412ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34132c0544b2STheodore Ts'o sbi->s_sb = sb; 3414240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3415d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3416f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3417f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3418f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3419ac27a0ecSDave Kleikamp 34209f6200bbSTheodore Ts'o /* Cleanup superblock name */ 34219f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 34229f6200bbSTheodore Ts'o *cp = '!'; 34239f6200bbSTheodore Ts'o 342407aa2ea1SLukas Czerner /* -EINVAL is default */ 3425dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3426617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3427ac27a0ecSDave Kleikamp if (!blocksize) { 3428b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3429ac27a0ecSDave Kleikamp goto out_fail; 3430ac27a0ecSDave Kleikamp } 3431ac27a0ecSDave Kleikamp 3432ac27a0ecSDave Kleikamp /* 3433617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3434ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3435ac27a0ecSDave Kleikamp */ 3436617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 343770bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 343870bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3439ac27a0ecSDave Kleikamp } else { 344070bbb3e0SAndrew Morton logical_sb_block = sb_block; 3441ac27a0ecSDave Kleikamp } 3442ac27a0ecSDave Kleikamp 344370bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3444b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3445ac27a0ecSDave Kleikamp goto out_fail; 3446ac27a0ecSDave Kleikamp } 3447ac27a0ecSDave Kleikamp /* 3448ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3449617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3450ac27a0ecSDave Kleikamp */ 34512716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3452ac27a0ecSDave Kleikamp sbi->s_es = es; 3453ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3454617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3455617ba13bSMingming Cao goto cantfind_ext4; 3456afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3457ac27a0ecSDave Kleikamp 3458feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3459feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3460feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3461feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3462feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3463feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3464feb0ab32SDarrick J. Wong 3465d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3466d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3467d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3468d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3469d25425f8SDarrick J. Wong silent = 1; 3470d25425f8SDarrick J. Wong goto cantfind_ext4; 3471d25425f8SDarrick J. Wong } 3472d25425f8SDarrick J. Wong 34730441984aSDarrick J. Wong /* Load the checksum driver */ 34740441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 34750441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 34760441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 34770441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 34780441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 34790441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 34800441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 34810441984aSDarrick J. Wong goto failed_mount; 34820441984aSDarrick J. Wong } 34830441984aSDarrick J. Wong } 34840441984aSDarrick J. Wong 3485a9c47317SDarrick J. Wong /* Check superblock checksum */ 3486a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3487a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3488a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3489a9c47317SDarrick J. Wong silent = 1; 3490a9c47317SDarrick J. Wong goto cantfind_ext4; 3491a9c47317SDarrick J. Wong } 3492a9c47317SDarrick J. Wong 3493a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3494a9c47317SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3495a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 3496a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3497a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3498a9c47317SDarrick J. Wong 3499ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3500ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3501fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3502617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3503fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 350487f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3505fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3506617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3507fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3508ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3509fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 351003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3511fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35122e7842b8SHugh Dickins #endif 3513617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3514fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3515617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3516fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3517617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3518fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3519ac27a0ecSDave Kleikamp 3520617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3521fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3522bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3523fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3524bb4f397aSAneesh Kumar K.V else 3525fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 35268b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3527fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35288b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3529fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3530ac27a0ecSDave Kleikamp 353108cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 353208cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 353330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 353430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 353530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3536ac27a0ecSDave Kleikamp 35378b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3538fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3539ac27a0ecSDave Kleikamp 35401e2462f9SMingming Cao /* 3541dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3542dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3543dd919b98SAneesh Kumar K.V */ 3544bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35458b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3546fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3547dd919b98SAneesh Kumar K.V 354851ce6511SLukas Czerner /* 354951ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 355051ce6511SLukas Czerner * no mount option specified. 355151ce6511SLukas Czerner */ 355251ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 355351ce6511SLukas Czerner 35548b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3555661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 35568b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35578b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35588b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 35598b67f04aSTheodore Ts'o } 35605a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3561b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3562661aa520SEric Sandeen &journal_ioprio, 0)) 3563ac27a0ecSDave Kleikamp goto failed_mount; 3564ac27a0ecSDave Kleikamp 356556889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 356656889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 356756889787STheodore Ts'o "with data=journal disables delayed " 356856889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 356956889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 357056889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 357156889787STheodore Ts'o "both data=journal and delalloc"); 357256889787STheodore Ts'o goto failed_mount; 357356889787STheodore Ts'o } 357456889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 357556889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 35766ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 357756889787STheodore Ts'o goto failed_mount; 357856889787STheodore Ts'o } 357956889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 358056889787STheodore Ts'o clear_opt(sb, DELALLOC); 358156889787STheodore Ts'o } 358256889787STheodore Ts'o 3583ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3584482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3585ac27a0ecSDave Kleikamp 3586617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3587617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3588617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3589617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3590b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3591b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3592b31e1552SEric Sandeen "running e2fsck is recommended"); 3593469108ffSTheodore Tso 3594ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3595ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3596ed3654ebSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, 3597ed3654ebSTheodore Ts'o EXT4_FEATURE_INCOMPAT_64BIT)) { 3598ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3599ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3600ed3654ebSTheodore Ts'o goto failed_mount; 3601ed3654ebSTheodore Ts'o } 3602ed3654ebSTheodore Ts'o } 3603ed3654ebSTheodore Ts'o 36042035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36052035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36062035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36072035e776STheodore Ts'o "using the ext4 subsystem"); 36082035e776STheodore Ts'o else { 36092035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36102035e776STheodore Ts'o "to feature incompatibilities"); 36112035e776STheodore Ts'o goto failed_mount; 36122035e776STheodore Ts'o } 36132035e776STheodore Ts'o } 36142035e776STheodore Ts'o 36152035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36162035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36172035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36182035e776STheodore Ts'o "using the ext4 subsystem"); 36192035e776STheodore Ts'o else { 36202035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36212035e776STheodore Ts'o "to feature incompatibilities"); 36222035e776STheodore Ts'o goto failed_mount; 36232035e776STheodore Ts'o } 36242035e776STheodore Ts'o } 36252035e776STheodore Ts'o 3626469108ffSTheodore Tso /* 3627ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3628ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3629ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3630ac27a0ecSDave Kleikamp */ 3631a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3632ac27a0ecSDave Kleikamp goto failed_mount; 3633a13fb1a4SEric Sandeen 3634261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3635617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3636617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3637b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3638b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3639ac27a0ecSDave Kleikamp goto failed_mount; 3640ac27a0ecSDave Kleikamp } 3641ac27a0ecSDave Kleikamp 3642ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3643ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3644ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3645b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3646ce40733cSAneesh Kumar K.V blocksize); 3647ac27a0ecSDave Kleikamp goto failed_mount; 3648ac27a0ecSDave Kleikamp } 3649ac27a0ecSDave Kleikamp 3650ac27a0ecSDave Kleikamp brelse(bh); 365170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 365270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 365370bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3654ac27a0ecSDave Kleikamp if (!bh) { 3655b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3656b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3657ac27a0ecSDave Kleikamp goto failed_mount; 3658ac27a0ecSDave Kleikamp } 36592716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3660ac27a0ecSDave Kleikamp sbi->s_es = es; 3661617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3662b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3663b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3664ac27a0ecSDave Kleikamp goto failed_mount; 3665ac27a0ecSDave Kleikamp } 3666ac27a0ecSDave Kleikamp } 3667ac27a0ecSDave Kleikamp 3668a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3669a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3670f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3671f287a1a5STheodore Ts'o has_huge_files); 3672f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3673ac27a0ecSDave Kleikamp 3674617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3675617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3676617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3677ac27a0ecSDave Kleikamp } else { 3678ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3679ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3680617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 36811330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3682ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3683b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3684b31e1552SEric Sandeen "unsupported inode size: %d", 3685ac27a0ecSDave Kleikamp sbi->s_inode_size); 3686ac27a0ecSDave Kleikamp goto failed_mount; 3687ac27a0ecSDave Kleikamp } 3688ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3689ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3690ac27a0ecSDave Kleikamp } 36910b8e58a1SAndreas Dilger 36920d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 36930d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 36948fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 36950d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3696d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3697b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3698b31e1552SEric Sandeen "unsupported descriptor size %lu", 36990d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37000d1ee42fSAlexandre Ratchov goto failed_mount; 37010d1ee42fSAlexandre Ratchov } 37020d1ee42fSAlexandre Ratchov } else 37030d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37040b8e58a1SAndreas Dilger 3705ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3706ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3707b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3708617ba13bSMingming Cao goto cantfind_ext4; 37090b8e58a1SAndreas Dilger 3710617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3711ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3712617ba13bSMingming Cao goto cantfind_ext4; 3713ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3714ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37150d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3716ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3717ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3718e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3719e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37200b8e58a1SAndreas Dilger 3721ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3722ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3723ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 372423301410STheodore Ts'o if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { 3725f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3726f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3727f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3728f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3729f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 373023301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 373123301410STheodore Ts'o es->s_flags |= 373223301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3733f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3734f99b2589STheodore Ts'o #else 373523301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 373623301410STheodore Ts'o es->s_flags |= 373723301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3738f99b2589STheodore Ts'o #endif 3739f99b2589STheodore Ts'o } 374023301410STheodore Ts'o } 3741ac27a0ecSDave Kleikamp 3742281b5995STheodore Ts'o /* Handle clustersize */ 3743281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3744281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3745281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3746281b5995STheodore Ts'o if (has_bigalloc) { 3747281b5995STheodore Ts'o if (clustersize < blocksize) { 3748281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3749281b5995STheodore Ts'o "cluster size (%d) smaller than " 3750281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3751281b5995STheodore Ts'o goto failed_mount; 3752281b5995STheodore Ts'o } 3753281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3754281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3755281b5995STheodore Ts'o sbi->s_clusters_per_group = 3756281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3757281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3758281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3759281b5995STheodore Ts'o "#clusters per group too big: %lu", 3760281b5995STheodore Ts'o sbi->s_clusters_per_group); 3761281b5995STheodore Ts'o goto failed_mount; 3762281b5995STheodore Ts'o } 3763281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3764281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3765281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3766281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3767281b5995STheodore Ts'o sbi->s_blocks_per_group, 3768281b5995STheodore Ts'o sbi->s_clusters_per_group); 3769281b5995STheodore Ts'o goto failed_mount; 3770281b5995STheodore Ts'o } 3771281b5995STheodore Ts'o } else { 3772281b5995STheodore Ts'o if (clustersize != blocksize) { 3773281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3774281b5995STheodore Ts'o "block size (%d)", clustersize, 3775281b5995STheodore Ts'o blocksize); 3776281b5995STheodore Ts'o clustersize = blocksize; 3777281b5995STheodore Ts'o } 3778ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3779b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3780b31e1552SEric Sandeen "#blocks per group too big: %lu", 3781ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3782ac27a0ecSDave Kleikamp goto failed_mount; 3783ac27a0ecSDave Kleikamp } 3784281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3785281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3786281b5995STheodore Ts'o } 3787281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3788281b5995STheodore Ts'o 3789ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3790b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3791b31e1552SEric Sandeen "#inodes per group too big: %lu", 3792ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3793ac27a0ecSDave Kleikamp goto failed_mount; 3794ac27a0ecSDave Kleikamp } 3795ac27a0ecSDave Kleikamp 3796960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3797960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3798960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3799960fd856STheodore Ts'o 3800bf43d84bSEric Sandeen /* 3801bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3802bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3803bf43d84bSEric Sandeen */ 38045a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 380530ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38065a9ae68aSDarrick J. Wong if (err) { 3807b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3808bf43d84bSEric Sandeen " too large to mount safely on this system"); 3809ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 381090c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3811ac27a0ecSDave Kleikamp goto failed_mount; 3812ac27a0ecSDave Kleikamp } 3813ac27a0ecSDave Kleikamp 3814617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3815617ba13bSMingming Cao goto cantfind_ext4; 3816e7c95593SEric Sandeen 38170f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38180f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38190f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3820b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3821b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38220f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38230f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38240f2ddca6SFrom: Thiemo Nagel } 38250f2ddca6SFrom: Thiemo Nagel 38264ec11028STheodore Ts'o /* 38274ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38284ec11028STheodore Ts'o * of the filesystem. 38294ec11028STheodore Ts'o */ 38304ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3831b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3832b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3833e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38344ec11028STheodore Ts'o ext4_blocks_count(es)); 3835e7c95593SEric Sandeen goto failed_mount; 3836e7c95593SEric Sandeen } 3837bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3838bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3839bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3840bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 38414ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3842b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 38434ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3844b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 38454ec11028STheodore Ts'o ext4_blocks_count(es), 38464ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 38474ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 38484ec11028STheodore Ts'o goto failed_mount; 38494ec11028STheodore Ts'o } 3850bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3851fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3852fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3853617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3854617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3855f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3856f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3857ac27a0ecSDave Kleikamp GFP_KERNEL); 3858ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3859b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 38602cde417dSTheodore Ts'o ret = -ENOMEM; 3861ac27a0ecSDave Kleikamp goto failed_mount; 3862ac27a0ecSDave Kleikamp } 3863ac27a0ecSDave Kleikamp 38649f6200bbSTheodore Ts'o if (ext4_proc_root) 38659f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3866240799cdSTheodore Ts'o 386766acdcf4STheodore Ts'o if (sbi->s_proc) 386866acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 386966acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 387066acdcf4STheodore Ts'o 3871705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3872ac27a0ecSDave Kleikamp 3873ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 387470bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3875ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3876ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3877b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3878b31e1552SEric Sandeen "can't read group descriptor %d", i); 3879ac27a0ecSDave Kleikamp db_count = i; 3880ac27a0ecSDave Kleikamp goto failed_mount2; 3881ac27a0ecSDave Kleikamp } 3882ac27a0ecSDave Kleikamp } 388300764937SAzat Khuzhin 388400764937SAzat Khuzhin /* 388500764937SAzat Khuzhin * set up enough so that it can read an inode, 388600764937SAzat Khuzhin * and create new inode for buddy allocator 388700764937SAzat Khuzhin */ 388800764937SAzat Khuzhin sbi->s_gdb_count = db_count; 388900764937SAzat Khuzhin if (!test_opt(sb, NOLOAD) && 389000764937SAzat Khuzhin EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 389100764937SAzat Khuzhin sb->s_op = &ext4_sops; 389200764937SAzat Khuzhin else 389300764937SAzat Khuzhin sb->s_op = &ext4_nojournal_sops; 389400764937SAzat Khuzhin 389500764937SAzat Khuzhin ext4_ext_init(sb); 389600764937SAzat Khuzhin err = ext4_mb_init(sb); 389700764937SAzat Khuzhin if (err) { 389800764937SAzat Khuzhin ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 389900764937SAzat Khuzhin err); 390000764937SAzat Khuzhin goto failed_mount2; 390100764937SAzat Khuzhin } 390200764937SAzat Khuzhin 3903bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3904b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 390500764937SAzat Khuzhin goto failed_mount2a; 3906ac27a0ecSDave Kleikamp } 3907772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3908772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3909b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3910b31e1552SEric Sandeen "unable to initialize " 3911b31e1552SEric Sandeen "flex_bg meta info!"); 391200764937SAzat Khuzhin goto failed_mount2a; 3913772cb7c8SJose R. Santos } 3914772cb7c8SJose R. Santos 3915ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3916ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3917ac27a0ecSDave Kleikamp 391804496411STao Ma init_timer(&sbi->s_err_report); 391904496411STao Ma sbi->s_err_report.function = print_daily_error_info; 392004496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 392104496411STao Ma 3922a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3923d3922a77SZheng Liu ext4_es_register_shrinker(sbi); 3924a75ae78fSDmitry Monakhov 392557042651STheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, 39265dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3927ce7e010aSTheodore Ts'o if (!err) { 3928ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3929ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3930ce7e010aSTheodore Ts'o } 3931ce7e010aSTheodore Ts'o if (!err) { 3932ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3933ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3934ce7e010aSTheodore Ts'o } 3935ce7e010aSTheodore Ts'o if (!err) { 393657042651STheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 3937ce7e010aSTheodore Ts'o } 39381ac6466fSTheodore Ts'o if (!err) { 39391ac6466fSTheodore Ts'o err = percpu_counter_init(&sbi->s_extent_cache_cnt, 0); 39401ac6466fSTheodore Ts'o } 3941ce7e010aSTheodore Ts'o if (err) { 3942ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3943ce7e010aSTheodore Ts'o goto failed_mount3; 3944ce7e010aSTheodore Ts'o } 3945ce7e010aSTheodore Ts'o 3946c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 394767a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3948c9de560dSAlex Tomas 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 /* 4038ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 4039ce7e010aSTheodore Ts'o * need to update the global counters. 4040ce7e010aSTheodore Ts'o */ 404157042651STheodore Ts'o percpu_counter_set(&sbi->s_freeclusters_counter, 40425dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 4043ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 404484061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 4045ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 404684061e07SDmitry Monakhov ext4_count_dirs(sb)); 404757042651STheodore Ts'o percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); 4048206f7ab4SChristoph Hellwig 4049ce7e010aSTheodore Ts'o no_journal: 40509c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 40519c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 40529c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40539c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40549c191f70ST Makphaibulchoke goto failed_mount_wq; 40559c191f70ST Makphaibulchoke } 40569c191f70ST Makphaibulchoke } 40579c191f70ST Makphaibulchoke 4058fd89d5f2STejun Heo /* 4059952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4060952fc18eSTheodore Ts'o * superblock if present. 4061952fc18eSTheodore Ts'o */ 4062952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4063952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4064952fc18eSTheodore Ts'o else { 406507aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 406607aa2ea1SLukas Czerner if (err) 4067952fc18eSTheodore Ts'o goto failed_mount_wq; 4068952fc18eSTheodore Ts'o } 4069952fc18eSTheodore Ts'o 4070952fc18eSTheodore Ts'o /* 4071fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4072fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4073fd89d5f2STejun Heo */ 40742e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40752e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40762e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40772e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 407807aa2ea1SLukas Czerner ret = -ENOMEM; 40792e8fa54eSJan Kara goto failed_mount4; 40802e8fa54eSJan Kara } 40812e8fa54eSJan Kara 4082ac27a0ecSDave Kleikamp /* 4083dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4084ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4085ac27a0ecSDave Kleikamp */ 4086ac27a0ecSDave Kleikamp 40871d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 40881d1fe1eeSDavid Howells if (IS_ERR(root)) { 4089b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 40901d1fe1eeSDavid Howells ret = PTR_ERR(root); 409132a9bb57SManish Katiyar root = NULL; 4092ac27a0ecSDave Kleikamp goto failed_mount4; 4093ac27a0ecSDave Kleikamp } 4094ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4095b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 409694bf608aSAl Viro iput(root); 4097ac27a0ecSDave Kleikamp goto failed_mount4; 4098ac27a0ecSDave Kleikamp } 409948fde701SAl Viro sb->s_root = d_make_root(root); 41001d1fe1eeSDavid Howells if (!sb->s_root) { 4101b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 41021d1fe1eeSDavid Howells ret = -ENOMEM; 41031d1fe1eeSDavid Howells goto failed_mount4; 41041d1fe1eeSDavid Howells } 4105ac27a0ecSDave Kleikamp 41067e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 41077e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4108ef7f3835SKalpak Shah 4109ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4110ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 4111ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4112ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4113ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 4114ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 4115ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4116ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4117ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4118ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4119ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4120ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4121ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4122ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4123ef7f3835SKalpak Shah } 4124ef7f3835SKalpak Shah } 4125ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4126ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4127ef7f3835SKalpak Shah sbi->s_inode_size) { 4128ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4129ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4130b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4131b31e1552SEric Sandeen "available"); 4132ef7f3835SKalpak Shah } 4133ef7f3835SKalpak Shah 413430fac0f7SJan Kara err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); 413527dd4385SLukas Czerner if (err) { 413627dd4385SLukas Czerner ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " 413730fac0f7SJan Kara "reserved pool", ext4_calculate_resv_clusters(sb)); 413800764937SAzat Khuzhin goto failed_mount5; 413927dd4385SLukas Czerner } 414027dd4385SLukas Czerner 41416fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 41426fd058f7STheodore Ts'o if (err) { 4143b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4144fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4145dcf2d804STao Ma goto failed_mount5; 4146c2774d84SAneesh Kumar K.V } 4147c2774d84SAneesh Kumar K.V 4148bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4149bfff6873SLukas Czerner if (err) 4150dcf2d804STao Ma goto failed_mount6; 4151bfff6873SLukas Czerner 41523197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 41533197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 41543197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 41553197ebdbSTheodore Ts'o "%s", sb->s_id); 4156dcf2d804STao Ma if (err) 4157dcf2d804STao Ma goto failed_mount7; 41583197ebdbSTheodore Ts'o 41599b2ff357SJan Kara #ifdef CONFIG_QUOTA 41609b2ff357SJan Kara /* Enable quota usage during mount. */ 41619b2ff357SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 41629b2ff357SJan Kara !(sb->s_flags & MS_RDONLY)) { 41639b2ff357SJan Kara err = ext4_enable_quotas(sb); 41649b2ff357SJan Kara if (err) 41659b2ff357SJan Kara goto failed_mount8; 41669b2ff357SJan Kara } 41679b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 41689b2ff357SJan Kara 4169617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4170617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4171617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 41720390131bSFrank Mayhar if (needs_recovery) { 4173b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4174617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 41750390131bSFrank Mayhar } 41760390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 41770390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 41780390131bSFrank Mayhar descr = " journalled data mode"; 41790390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 41800390131bSFrank Mayhar descr = " ordered data mode"; 41810390131bSFrank Mayhar else 41820390131bSFrank Mayhar descr = " writeback data mode"; 41830390131bSFrank Mayhar } else 41840390131bSFrank Mayhar descr = "out journal"; 41850390131bSFrank Mayhar 418679add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 418779add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 418879add3a3SLukas Czerner if (!blk_queue_discard(q)) 418979add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 419079add3a3SLukas Czerner "mounting with \"discard\" option, but " 419179add3a3SLukas Czerner "the device does not support discard"); 419279add3a3SLukas Czerner } 419379add3a3SLukas Czerner 4194d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 41958b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 41968b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4197ac27a0ecSDave Kleikamp 419866e61a9eSTheodore Ts'o if (es->s_error_count) 419966e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4200ac27a0ecSDave Kleikamp 4201efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4202efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4203efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4204efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4205efbed4dcSTheodore Ts'o 4206d4c402d9SCurt Wohlgemuth kfree(orig_data); 4207ac27a0ecSDave Kleikamp return 0; 4208ac27a0ecSDave Kleikamp 4209617ba13bSMingming Cao cantfind_ext4: 4210ac27a0ecSDave Kleikamp if (!silent) 4211b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4212ac27a0ecSDave Kleikamp goto failed_mount; 4213ac27a0ecSDave Kleikamp 421472ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 421572ba7450STheodore Ts'o failed_mount8: 421672ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 421772ba7450STheodore Ts'o #endif 4218dcf2d804STao Ma failed_mount7: 4219dcf2d804STao Ma ext4_unregister_li_request(sb); 4220dcf2d804STao Ma failed_mount6: 4221dcf2d804STao Ma ext4_release_system_zone(sb); 422200764937SAzat Khuzhin failed_mount5: 422394bf608aSAl Viro dput(sb->s_root); 422432a9bb57SManish Katiyar sb->s_root = NULL; 422594bf608aSAl Viro failed_mount4: 4226b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 42272e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 42282e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 42294c0425ffSMingming Cao failed_mount_wq: 42300390131bSFrank Mayhar if (sbi->s_journal) { 4231dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 423247b4a50bSJan Kara sbi->s_journal = NULL; 42330390131bSFrank Mayhar } 4234ac27a0ecSDave Kleikamp failed_mount3: 4235d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 42369105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 42379933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 42389933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 423957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4240ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4241ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 424257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 42431ac6466fSTheodore Ts'o percpu_counter_destroy(&sbi->s_extent_cache_cnt); 4244c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4245c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 424600764937SAzat Khuzhin failed_mount2a: 424700764937SAzat Khuzhin ext4_mb_release(sb); 4248ac27a0ecSDave Kleikamp failed_mount2: 4249ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4250ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4251f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4252ac27a0ecSDave Kleikamp failed_mount: 425300764937SAzat Khuzhin ext4_ext_release(sb); 42540441984aSDarrick J. Wong if (sbi->s_chksum_driver) 42550441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4256240799cdSTheodore Ts'o if (sbi->s_proc) { 425766acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 42589f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4259240799cdSTheodore Ts'o } 4260ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4261ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4262ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4263ac27a0ecSDave Kleikamp #endif 4264617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4265ac27a0ecSDave Kleikamp brelse(bh); 4266ac27a0ecSDave Kleikamp out_fail: 4267ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4268f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4269ac27a0ecSDave Kleikamp kfree(sbi); 4270dcc7dae3SCyrill Gorcunov out_free_orig: 4271d4c402d9SCurt Wohlgemuth kfree(orig_data); 427207aa2ea1SLukas Czerner return err ? err : ret; 4273ac27a0ecSDave Kleikamp } 4274ac27a0ecSDave Kleikamp 4275ac27a0ecSDave Kleikamp /* 4276ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4277ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4278ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4279ac27a0ecSDave Kleikamp */ 4280617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4281ac27a0ecSDave Kleikamp { 4282617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4283ac27a0ecSDave Kleikamp 4284ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 428530773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 428630773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4287ac27a0ecSDave Kleikamp 4288a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4289ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4290dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4291ac27a0ecSDave Kleikamp else 4292dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 42935bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 42945bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 42955bf5683aSHidehiro Kawai else 42965bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4297a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4298ac27a0ecSDave Kleikamp } 4299ac27a0ecSDave Kleikamp 4300617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4301ac27a0ecSDave Kleikamp unsigned int journal_inum) 4302ac27a0ecSDave Kleikamp { 4303ac27a0ecSDave Kleikamp struct inode *journal_inode; 4304ac27a0ecSDave Kleikamp journal_t *journal; 4305ac27a0ecSDave Kleikamp 43060390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43070390131bSFrank Mayhar 4308ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4309ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4310ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4311ac27a0ecSDave Kleikamp 43121d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43131d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4314b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4315ac27a0ecSDave Kleikamp return NULL; 4316ac27a0ecSDave Kleikamp } 4317ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4318ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4319ac27a0ecSDave Kleikamp iput(journal_inode); 4320b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4321ac27a0ecSDave Kleikamp return NULL; 4322ac27a0ecSDave Kleikamp } 4323ac27a0ecSDave Kleikamp 4324e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4325ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 43261d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4327b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4328ac27a0ecSDave Kleikamp iput(journal_inode); 4329ac27a0ecSDave Kleikamp return NULL; 4330ac27a0ecSDave Kleikamp } 4331ac27a0ecSDave Kleikamp 4332dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4333ac27a0ecSDave Kleikamp if (!journal) { 4334b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4335ac27a0ecSDave Kleikamp iput(journal_inode); 4336ac27a0ecSDave Kleikamp return NULL; 4337ac27a0ecSDave Kleikamp } 4338ac27a0ecSDave Kleikamp journal->j_private = sb; 4339617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4340ac27a0ecSDave Kleikamp return journal; 4341ac27a0ecSDave Kleikamp } 4342ac27a0ecSDave Kleikamp 4343617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4344ac27a0ecSDave Kleikamp dev_t j_dev) 4345ac27a0ecSDave Kleikamp { 4346ac27a0ecSDave Kleikamp struct buffer_head *bh; 4347ac27a0ecSDave Kleikamp journal_t *journal; 4348617ba13bSMingming Cao ext4_fsblk_t start; 4349617ba13bSMingming Cao ext4_fsblk_t len; 4350ac27a0ecSDave Kleikamp int hblock, blocksize; 4351617ba13bSMingming Cao ext4_fsblk_t sb_block; 4352ac27a0ecSDave Kleikamp unsigned long offset; 4353617ba13bSMingming Cao struct ext4_super_block *es; 4354ac27a0ecSDave Kleikamp struct block_device *bdev; 4355ac27a0ecSDave Kleikamp 43560390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43570390131bSFrank Mayhar 4358b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4359ac27a0ecSDave Kleikamp if (bdev == NULL) 4360ac27a0ecSDave Kleikamp return NULL; 4361ac27a0ecSDave Kleikamp 4362ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4363e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4364ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4365b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4366b31e1552SEric Sandeen "blocksize too small for journal device"); 4367ac27a0ecSDave Kleikamp goto out_bdev; 4368ac27a0ecSDave Kleikamp } 4369ac27a0ecSDave Kleikamp 4370617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4371617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4372ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4373ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4374b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4375b31e1552SEric Sandeen "external journal"); 4376ac27a0ecSDave Kleikamp goto out_bdev; 4377ac27a0ecSDave Kleikamp } 4378ac27a0ecSDave Kleikamp 43792716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4380617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4381ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4382617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4383b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4384b31e1552SEric Sandeen "bad superblock"); 4385ac27a0ecSDave Kleikamp brelse(bh); 4386ac27a0ecSDave Kleikamp goto out_bdev; 4387ac27a0ecSDave Kleikamp } 4388ac27a0ecSDave Kleikamp 4389617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4390b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4391ac27a0ecSDave Kleikamp brelse(bh); 4392ac27a0ecSDave Kleikamp goto out_bdev; 4393ac27a0ecSDave Kleikamp } 4394ac27a0ecSDave Kleikamp 4395bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4396ac27a0ecSDave Kleikamp start = sb_block + 1; 4397ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4398ac27a0ecSDave Kleikamp 4399dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4400ac27a0ecSDave Kleikamp start, len, blocksize); 4401ac27a0ecSDave Kleikamp if (!journal) { 4402b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4403ac27a0ecSDave Kleikamp goto out_bdev; 4404ac27a0ecSDave Kleikamp } 4405ac27a0ecSDave Kleikamp journal->j_private = sb; 44069f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4407ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4408ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4409b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4410ac27a0ecSDave Kleikamp goto out_journal; 4411ac27a0ecSDave Kleikamp } 4412ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4413b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4414b31e1552SEric Sandeen "user (unsupported) - %d", 4415ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4416ac27a0ecSDave Kleikamp goto out_journal; 4417ac27a0ecSDave Kleikamp } 4418617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4419617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4420ac27a0ecSDave Kleikamp return journal; 44210b8e58a1SAndreas Dilger 4422ac27a0ecSDave Kleikamp out_journal: 4423dab291afSMingming Cao jbd2_journal_destroy(journal); 4424ac27a0ecSDave Kleikamp out_bdev: 4425617ba13bSMingming Cao ext4_blkdev_put(bdev); 4426ac27a0ecSDave Kleikamp return NULL; 4427ac27a0ecSDave Kleikamp } 4428ac27a0ecSDave Kleikamp 4429617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4430617ba13bSMingming Cao struct ext4_super_block *es, 4431ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4432ac27a0ecSDave Kleikamp { 4433ac27a0ecSDave Kleikamp journal_t *journal; 4434ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4435ac27a0ecSDave Kleikamp dev_t journal_dev; 4436ac27a0ecSDave Kleikamp int err = 0; 4437ac27a0ecSDave Kleikamp int really_read_only; 4438ac27a0ecSDave Kleikamp 44390390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44400390131bSFrank Mayhar 4441ac27a0ecSDave Kleikamp if (journal_devnum && 4442ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4443b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4444b31e1552SEric Sandeen "numbers have changed"); 4445ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4446ac27a0ecSDave Kleikamp } else 4447ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4448ac27a0ecSDave Kleikamp 4449ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4450ac27a0ecSDave Kleikamp 4451ac27a0ecSDave Kleikamp /* 4452ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4453ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4454ac27a0ecSDave Kleikamp * can get read-write access to the device. 4455ac27a0ecSDave Kleikamp */ 4456617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4457ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4458b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4459b31e1552SEric Sandeen "required on readonly filesystem"); 4460ac27a0ecSDave Kleikamp if (really_read_only) { 4461b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4462b31e1552SEric Sandeen "unavailable, cannot proceed"); 4463ac27a0ecSDave Kleikamp return -EROFS; 4464ac27a0ecSDave Kleikamp } 4465b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4466b31e1552SEric Sandeen "be enabled during recovery"); 4467ac27a0ecSDave Kleikamp } 4468ac27a0ecSDave Kleikamp } 4469ac27a0ecSDave Kleikamp 4470ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4471b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4472b31e1552SEric Sandeen "and inode journals!"); 4473ac27a0ecSDave Kleikamp return -EINVAL; 4474ac27a0ecSDave Kleikamp } 4475ac27a0ecSDave Kleikamp 4476ac27a0ecSDave Kleikamp if (journal_inum) { 4477617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4478ac27a0ecSDave Kleikamp return -EINVAL; 4479ac27a0ecSDave Kleikamp } else { 4480617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4481ac27a0ecSDave Kleikamp return -EINVAL; 4482ac27a0ecSDave Kleikamp } 4483ac27a0ecSDave Kleikamp 448490576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4485b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 44864776004fSTheodore Ts'o 4487617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4488dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 44891c13d5c0STheodore Ts'o if (!err) { 44901c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 44911c13d5c0STheodore Ts'o if (save) 44921c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 44931c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4494dab291afSMingming Cao err = jbd2_journal_load(journal); 44951c13d5c0STheodore Ts'o if (save) 44961c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 44971c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 44981c13d5c0STheodore Ts'o kfree(save); 44991c13d5c0STheodore Ts'o } 4500ac27a0ecSDave Kleikamp 4501ac27a0ecSDave Kleikamp if (err) { 4502b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4503dab291afSMingming Cao jbd2_journal_destroy(journal); 4504ac27a0ecSDave Kleikamp return err; 4505ac27a0ecSDave Kleikamp } 4506ac27a0ecSDave Kleikamp 4507617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4508617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4509ac27a0ecSDave Kleikamp 4510c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4511ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4512ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4513ac27a0ecSDave Kleikamp 4514ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4515e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4516ac27a0ecSDave Kleikamp } 4517ac27a0ecSDave Kleikamp 4518ac27a0ecSDave Kleikamp return 0; 4519ac27a0ecSDave Kleikamp } 4520ac27a0ecSDave Kleikamp 4521e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4522ac27a0ecSDave Kleikamp { 4523e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4524617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4525c4be0c1dSTakashi Sato int error = 0; 4526ac27a0ecSDave Kleikamp 45277c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4528c4be0c1dSTakashi Sato return error; 4529914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4530914258bfSTheodore Ts'o /* 4531914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4532914258bfSTheodore Ts'o * superblock failed. This could happen because the 4533914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4534914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4535914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4536914258bfSTheodore Ts'o * write and hope for the best. 4537914258bfSTheodore Ts'o */ 4538b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4539b31e1552SEric Sandeen "superblock detected"); 4540914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4541914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4542914258bfSTheodore Ts'o } 454371290b36STheodore Ts'o /* 454471290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 454571290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 454671290b36STheodore Ts'o * write time when we are mounting the root file system 454771290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 454871290b36STheodore Ts'o * for people who are east of GMT and who make their clock 454971290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 455071290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 455171290b36STheodore Ts'o * to complain and force a full file system check. 455271290b36STheodore Ts'o */ 455371290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4554ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4555f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4556afc32f7eSTheodore Ts'o es->s_kbytes_written = 4557afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4558afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4559afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4560f613dfcbSTheodore Ts'o else 4561f613dfcbSTheodore Ts'o es->s_kbytes_written = 4562f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 456357042651STheodore Ts'o ext4_free_blocks_count_set(es, 456457042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 456557042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 45667f93cff9STheodore Ts'o es->s_free_inodes_count = 45677f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 45685d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4569ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 457006db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4571ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4572914258bfSTheodore Ts'o if (sync) { 4573c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4574c4be0c1dSTakashi Sato if (error) 4575c4be0c1dSTakashi Sato return error; 4576c4be0c1dSTakashi Sato 4577c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4578c4be0c1dSTakashi Sato if (error) { 4579b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4580b31e1552SEric Sandeen "superblock"); 4581914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4582914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4583914258bfSTheodore Ts'o } 4584914258bfSTheodore Ts'o } 4585c4be0c1dSTakashi Sato return error; 4586ac27a0ecSDave Kleikamp } 4587ac27a0ecSDave Kleikamp 4588ac27a0ecSDave Kleikamp /* 4589ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4590ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4591ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4592ac27a0ecSDave Kleikamp */ 4593617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4594617ba13bSMingming Cao struct ext4_super_block *es) 4595ac27a0ecSDave Kleikamp { 4596617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4597ac27a0ecSDave Kleikamp 45980390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 45990390131bSFrank Mayhar BUG_ON(journal != NULL); 46000390131bSFrank Mayhar return; 46010390131bSFrank Mayhar } 4602dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46037ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 46047ffe1ea8SHidehiro Kawai goto out; 46057ffe1ea8SHidehiro Kawai 4606617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4607ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4608617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4609e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4610ac27a0ecSDave Kleikamp } 46117ffe1ea8SHidehiro Kawai 46127ffe1ea8SHidehiro Kawai out: 4613dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4614ac27a0ecSDave Kleikamp } 4615ac27a0ecSDave Kleikamp 4616ac27a0ecSDave Kleikamp /* 4617ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4618ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4619ac27a0ecSDave Kleikamp * main filesystem now. 4620ac27a0ecSDave Kleikamp */ 4621617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4622617ba13bSMingming Cao struct ext4_super_block *es) 4623ac27a0ecSDave Kleikamp { 4624ac27a0ecSDave Kleikamp journal_t *journal; 4625ac27a0ecSDave Kleikamp int j_errno; 4626ac27a0ecSDave Kleikamp const char *errstr; 4627ac27a0ecSDave Kleikamp 46280390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 46290390131bSFrank Mayhar 4630617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4631ac27a0ecSDave Kleikamp 4632ac27a0ecSDave Kleikamp /* 4633ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4634617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4635ac27a0ecSDave Kleikamp */ 4636ac27a0ecSDave Kleikamp 4637dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4638ac27a0ecSDave Kleikamp if (j_errno) { 4639ac27a0ecSDave Kleikamp char nbuf[16]; 4640ac27a0ecSDave Kleikamp 4641617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 464212062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4643ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 464412062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4645ac27a0ecSDave Kleikamp 4646617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4647617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4648e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4649ac27a0ecSDave Kleikamp 4650dab291afSMingming Cao jbd2_journal_clear_err(journal); 4651d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4652ac27a0ecSDave Kleikamp } 4653ac27a0ecSDave Kleikamp } 4654ac27a0ecSDave Kleikamp 4655ac27a0ecSDave Kleikamp /* 4656ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4657ac27a0ecSDave Kleikamp * and wait on the commit. 4658ac27a0ecSDave Kleikamp */ 4659617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4660ac27a0ecSDave Kleikamp { 4661ac27a0ecSDave Kleikamp journal_t *journal; 4662ac27a0ecSDave Kleikamp 4663ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4664ac27a0ecSDave Kleikamp return 0; 4665ac27a0ecSDave Kleikamp 4666617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4667b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4668ac27a0ecSDave Kleikamp } 4669ac27a0ecSDave Kleikamp 4670617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4671ac27a0ecSDave Kleikamp { 467214ce0cb4STheodore Ts'o int ret = 0; 46739eddacf9SJan Kara tid_t target; 467406a407f1SDmitry Monakhov bool needs_barrier = false; 46758d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4676ac27a0ecSDave Kleikamp 46779bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 46782e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4679a1177825SJan Kara /* 4680a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4681a1177825SJan Kara * no dirty dquots 4682a1177825SJan Kara */ 4683a1177825SJan Kara dquot_writeback_dquots(sb, -1); 468406a407f1SDmitry Monakhov /* 468506a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 468606a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 468706a407f1SDmitry Monakhov * transaction_commit will do it for us. 468806a407f1SDmitry Monakhov */ 468906a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 469006a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 469106a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 469206a407f1SDmitry Monakhov needs_barrier = true; 469306a407f1SDmitry Monakhov 46948d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4695ac27a0ecSDave Kleikamp if (wait) 469606a407f1SDmitry Monakhov ret = jbd2_log_wait_commit(sbi->s_journal, target); 46970390131bSFrank Mayhar } 469806a407f1SDmitry Monakhov if (needs_barrier) { 469906a407f1SDmitry Monakhov int err; 470006a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 470106a407f1SDmitry Monakhov if (!ret) 470206a407f1SDmitry Monakhov ret = err; 470306a407f1SDmitry Monakhov } 470406a407f1SDmitry Monakhov 470506a407f1SDmitry Monakhov return ret; 470606a407f1SDmitry Monakhov } 470706a407f1SDmitry Monakhov 470806a407f1SDmitry Monakhov static int ext4_sync_fs_nojournal(struct super_block *sb, int wait) 470906a407f1SDmitry Monakhov { 471006a407f1SDmitry Monakhov int ret = 0; 471106a407f1SDmitry Monakhov 471206a407f1SDmitry Monakhov trace_ext4_sync_fs(sb, wait); 471306a407f1SDmitry Monakhov flush_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 471406a407f1SDmitry Monakhov dquot_writeback_dquots(sb, -1); 471506a407f1SDmitry Monakhov if (wait && test_opt(sb, BARRIER)) 471606a407f1SDmitry Monakhov ret = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 471706a407f1SDmitry Monakhov 471814ce0cb4STheodore Ts'o return ret; 4719ac27a0ecSDave Kleikamp } 4720ac27a0ecSDave Kleikamp 4721ac27a0ecSDave Kleikamp /* 4722ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4723ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4724be4f27d3SYongqiang Yang * 4725be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 47268e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 47278e8ad8a5SJan Kara * modifications. 4728ac27a0ecSDave Kleikamp */ 4729c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4730ac27a0ecSDave Kleikamp { 4731c4be0c1dSTakashi Sato int error = 0; 4732c4be0c1dSTakashi Sato journal_t *journal; 4733ac27a0ecSDave Kleikamp 47349ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47359ca92389STheodore Ts'o return 0; 47369ca92389STheodore Ts'o 4737c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4738ac27a0ecSDave Kleikamp 4739ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4740dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47417ffe1ea8SHidehiro Kawai 47427ffe1ea8SHidehiro Kawai /* 47439ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 47449ca92389STheodore Ts'o * the journal. 47457ffe1ea8SHidehiro Kawai */ 4746c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 47476b0310fbSEric Sandeen if (error < 0) 47486b0310fbSEric Sandeen goto out; 4749ac27a0ecSDave Kleikamp 4750ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4751617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4752e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 47536b0310fbSEric Sandeen out: 47548e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 47556b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 47566b0310fbSEric Sandeen return error; 4757ac27a0ecSDave Kleikamp } 4758ac27a0ecSDave Kleikamp 4759ac27a0ecSDave Kleikamp /* 4760ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4761ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4762ac27a0ecSDave Kleikamp */ 4763c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4764ac27a0ecSDave Kleikamp { 47659ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47669ca92389STheodore Ts'o return 0; 47679ca92389STheodore Ts'o 47689ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4769617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4770e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4771c4be0c1dSTakashi Sato return 0; 4772ac27a0ecSDave Kleikamp } 4773ac27a0ecSDave Kleikamp 4774673c6100STheodore Ts'o /* 4775673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4776673c6100STheodore Ts'o */ 4777673c6100STheodore Ts'o struct ext4_mount_options { 4778673c6100STheodore Ts'o unsigned long s_mount_opt; 4779a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 478008cefc7aSEric W. Biederman kuid_t s_resuid; 478108cefc7aSEric W. Biederman kgid_t s_resgid; 4782673c6100STheodore Ts'o unsigned long s_commit_interval; 4783673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4784673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4785673c6100STheodore Ts'o int s_jquota_fmt; 4786673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4787673c6100STheodore Ts'o #endif 4788673c6100STheodore Ts'o }; 4789673c6100STheodore Ts'o 4790617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4791ac27a0ecSDave Kleikamp { 4792617ba13bSMingming Cao struct ext4_super_block *es; 4793617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4794ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4795617ba13bSMingming Cao struct ext4_mount_options old_opts; 4796c79d967dSChristoph Hellwig int enable_quota = 0; 47978a266467STheodore Ts'o ext4_group_t g; 4798b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4799c5e06d10SJohann Lombardi int err = 0; 4800ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 480103dafb5fSChen Gang int i, j; 4802ac27a0ecSDave Kleikamp #endif 4803d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4804ac27a0ecSDave Kleikamp 4805ac27a0ecSDave Kleikamp /* Store the original options */ 4806ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4807ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4808a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4809ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4810ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4811ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 481230773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 481330773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4814ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4815ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4816ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 481703dafb5fSChen Gang if (sbi->s_qf_names[i]) { 481803dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 481903dafb5fSChen Gang GFP_KERNEL); 482003dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 482103dafb5fSChen Gang for (j = 0; j < i; j++) 482203dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 48233e36a163SWei Yongjun kfree(orig_data); 482403dafb5fSChen Gang return -ENOMEM; 482503dafb5fSChen Gang } 482603dafb5fSChen Gang } else 482703dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4828ac27a0ecSDave Kleikamp #endif 4829b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4830b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4831ac27a0ecSDave Kleikamp 4832ac27a0ecSDave Kleikamp /* 4833ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4834ac27a0ecSDave Kleikamp */ 4835661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4836ac27a0ecSDave Kleikamp err = -EINVAL; 4837ac27a0ecSDave Kleikamp goto restore_opts; 4838ac27a0ecSDave Kleikamp } 4839ac27a0ecSDave Kleikamp 48406ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 48416ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 48426ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48436ae6514bSPiotr Sarna "both data=journal and delalloc"); 48446ae6514bSPiotr Sarna err = -EINVAL; 48456ae6514bSPiotr Sarna goto restore_opts; 48466ae6514bSPiotr Sarna } 48476ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 48486ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48496ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 48506ae6514bSPiotr Sarna err = -EINVAL; 48516ae6514bSPiotr Sarna goto restore_opts; 48526ae6514bSPiotr Sarna } 48536ae6514bSPiotr Sarna } 48546ae6514bSPiotr Sarna 48554ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4856c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4857ac27a0ecSDave Kleikamp 4858ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4859482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4860ac27a0ecSDave Kleikamp 4861ac27a0ecSDave Kleikamp es = sbi->s_es; 4862ac27a0ecSDave Kleikamp 4863b3881f74STheodore Ts'o if (sbi->s_journal) { 4864617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4865b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4866b3881f74STheodore Ts'o } 4867ac27a0ecSDave Kleikamp 4868661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 48694ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4870ac27a0ecSDave Kleikamp err = -EROFS; 4871ac27a0ecSDave Kleikamp goto restore_opts; 4872ac27a0ecSDave Kleikamp } 4873ac27a0ecSDave Kleikamp 4874ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 487538c03b34STheodore Ts'o err = sync_filesystem(sb); 487638c03b34STheodore Ts'o if (err < 0) 487738c03b34STheodore Ts'o goto restore_opts; 48780f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 48790f0dd62fSChristoph Hellwig if (err < 0) 4880c79d967dSChristoph Hellwig goto restore_opts; 4881c79d967dSChristoph Hellwig 4882ac27a0ecSDave Kleikamp /* 4883ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4884ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4885ac27a0ecSDave Kleikamp */ 4886ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4887ac27a0ecSDave Kleikamp 4888ac27a0ecSDave Kleikamp /* 4889ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4890ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4891ac27a0ecSDave Kleikamp * mark the partition as valid again. 4892ac27a0ecSDave Kleikamp */ 4893617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4894617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4895ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4896ac27a0ecSDave Kleikamp 4897a63c9eb2STheodore Ts'o if (sbi->s_journal) 4898617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4899ac27a0ecSDave Kleikamp } else { 4900a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4901a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4902ac27a0ecSDave Kleikamp err = -EROFS; 4903ac27a0ecSDave Kleikamp goto restore_opts; 4904ac27a0ecSDave Kleikamp } 4905ead6596bSEric Sandeen /* 49068a266467STheodore Ts'o * Make sure the group descriptor checksums 49070b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 49088a266467STheodore Ts'o */ 49098a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 49108a266467STheodore Ts'o struct ext4_group_desc *gdp = 49118a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 49128a266467STheodore Ts'o 4913feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4914b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4915b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 49168a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 49178a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 49188a266467STheodore Ts'o err = -EINVAL; 49198a266467STheodore Ts'o goto restore_opts; 49208a266467STheodore Ts'o } 49218a266467STheodore Ts'o } 49228a266467STheodore Ts'o 49238a266467STheodore Ts'o /* 4924ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4925ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4926ead6596bSEric Sandeen * require a full umount/remount for now. 4927ead6596bSEric Sandeen */ 4928ead6596bSEric Sandeen if (es->s_last_orphan) { 4929b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4930ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4931ead6596bSEric Sandeen "orphan inode list. Please " 4932b31e1552SEric Sandeen "umount/remount instead"); 4933ead6596bSEric Sandeen err = -EINVAL; 4934ead6596bSEric Sandeen goto restore_opts; 4935ead6596bSEric Sandeen } 4936ead6596bSEric Sandeen 4937ac27a0ecSDave Kleikamp /* 4938ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4939ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4940ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4941ac27a0ecSDave Kleikamp * the partition.) 4942ac27a0ecSDave Kleikamp */ 49430390131bSFrank Mayhar if (sbi->s_journal) 4944617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4945ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4946617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4947ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4948c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4949c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4950c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4951c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4952c5e06d10SJohann Lombardi err = -EROFS; 4953c5e06d10SJohann Lombardi goto restore_opts; 4954c5e06d10SJohann Lombardi } 4955c79d967dSChristoph Hellwig enable_quota = 1; 4956ac27a0ecSDave Kleikamp } 4957ac27a0ecSDave Kleikamp } 4958bfff6873SLukas Czerner 4959bfff6873SLukas Czerner /* 4960bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4961bfff6873SLukas Czerner * current settings 4962bfff6873SLukas Czerner */ 4963bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4964bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4965bfff6873SLukas Czerner else { 4966bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4967bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4968bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4969bfff6873SLukas Czerner } 4970bfff6873SLukas Czerner 49716fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4972d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 4973e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 49740390131bSFrank Mayhar 4975ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4976ac27a0ecSDave Kleikamp /* Release old quota file names */ 4977ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4978ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 49797c319d32SAditya Kali if (enable_quota) { 49807c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 49810f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 49827c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 49837c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 49847c319d32SAditya Kali err = ext4_enable_quotas(sb); 498507724f98STheodore Ts'o if (err) 49867c319d32SAditya Kali goto restore_opts; 49877c319d32SAditya Kali } 49887c319d32SAditya Kali } 49897c319d32SAditya Kali #endif 4990d4c402d9SCurt Wohlgemuth 4991d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4992d4c402d9SCurt Wohlgemuth kfree(orig_data); 4993ac27a0ecSDave Kleikamp return 0; 49940b8e58a1SAndreas Dilger 4995ac27a0ecSDave Kleikamp restore_opts: 4996ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4997ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4998a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4999ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5000ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5001ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 500230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 500330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5004ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5005ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5006ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 5007ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5008ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5009ac27a0ecSDave Kleikamp } 5010ac27a0ecSDave Kleikamp #endif 5011d4c402d9SCurt Wohlgemuth kfree(orig_data); 5012ac27a0ecSDave Kleikamp return err; 5013ac27a0ecSDave Kleikamp } 5014ac27a0ecSDave Kleikamp 5015617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5016ac27a0ecSDave Kleikamp { 5017ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5018617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5019617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 502027dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5021960cc398SPekka Enberg u64 fsid; 5022d02a9391SKazuya Mio s64 bfree; 502327dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5024ac27a0ecSDave Kleikamp 5025952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5026952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5027ac27a0ecSDave Kleikamp 5028617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5029ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5030b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 503157042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 503257042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5033d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 503457042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 503527dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 503627dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 503727dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5038ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5039ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 504052d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5041617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5042960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5043960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5044960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5045960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 50460b8e58a1SAndreas Dilger 5047ac27a0ecSDave Kleikamp return 0; 5048ac27a0ecSDave Kleikamp } 5049ac27a0ecSDave Kleikamp 50500b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 50510b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5052ac27a0ecSDave Kleikamp * Process 1 Process 2 5053617ba13bSMingming Cao * ext4_create() quota_sync() 5054dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5055871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5056dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5057ac27a0ecSDave Kleikamp * 5058ac27a0ecSDave Kleikamp */ 5059ac27a0ecSDave Kleikamp 5060ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5061ac27a0ecSDave Kleikamp 5062ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5063ac27a0ecSDave Kleikamp { 50644c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5065ac27a0ecSDave Kleikamp } 5066ac27a0ecSDave Kleikamp 5067617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5068ac27a0ecSDave Kleikamp { 5069ac27a0ecSDave Kleikamp int ret, err; 5070ac27a0ecSDave Kleikamp handle_t *handle; 5071ac27a0ecSDave Kleikamp struct inode *inode; 5072ac27a0ecSDave Kleikamp 5073ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 50749924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5075617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5076ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5077ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5078ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5079617ba13bSMingming Cao err = ext4_journal_stop(handle); 5080ac27a0ecSDave Kleikamp if (!ret) 5081ac27a0ecSDave Kleikamp ret = err; 5082ac27a0ecSDave Kleikamp return ret; 5083ac27a0ecSDave Kleikamp } 5084ac27a0ecSDave Kleikamp 5085617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5086ac27a0ecSDave Kleikamp { 5087ac27a0ecSDave Kleikamp int ret, err; 5088ac27a0ecSDave Kleikamp handle_t *handle; 5089ac27a0ecSDave Kleikamp 50909924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5091617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5092ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5093ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5094ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5095617ba13bSMingming Cao err = ext4_journal_stop(handle); 5096ac27a0ecSDave Kleikamp if (!ret) 5097ac27a0ecSDave Kleikamp ret = err; 5098ac27a0ecSDave Kleikamp return ret; 5099ac27a0ecSDave Kleikamp } 5100ac27a0ecSDave Kleikamp 5101617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5102ac27a0ecSDave Kleikamp { 5103ac27a0ecSDave Kleikamp int ret, err; 5104ac27a0ecSDave Kleikamp handle_t *handle; 5105ac27a0ecSDave Kleikamp 51069924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5107617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 51089c3013e9SJan Kara if (IS_ERR(handle)) { 51099c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 51109c3013e9SJan Kara dquot_release(dquot); 5111ac27a0ecSDave Kleikamp return PTR_ERR(handle); 51129c3013e9SJan Kara } 5113ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5114617ba13bSMingming Cao err = ext4_journal_stop(handle); 5115ac27a0ecSDave Kleikamp if (!ret) 5116ac27a0ecSDave Kleikamp ret = err; 5117ac27a0ecSDave Kleikamp return ret; 5118ac27a0ecSDave Kleikamp } 5119ac27a0ecSDave Kleikamp 5120617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5121ac27a0ecSDave Kleikamp { 5122262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5123262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5124262b4662SJan Kara 51252c8be6b2SJan Kara /* Are we journaling quotas? */ 5126262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 5127262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5128ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5129617ba13bSMingming Cao return ext4_write_dquot(dquot); 5130ac27a0ecSDave Kleikamp } else { 5131ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5132ac27a0ecSDave Kleikamp } 5133ac27a0ecSDave Kleikamp } 5134ac27a0ecSDave Kleikamp 5135617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5136ac27a0ecSDave Kleikamp { 5137ac27a0ecSDave Kleikamp int ret, err; 5138ac27a0ecSDave Kleikamp handle_t *handle; 5139ac27a0ecSDave Kleikamp 5140ac27a0ecSDave Kleikamp /* Data block + inode block */ 51419924a92aSTheodore Ts'o handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); 5142ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5143ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5144ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5145617ba13bSMingming Cao err = ext4_journal_stop(handle); 5146ac27a0ecSDave Kleikamp if (!ret) 5147ac27a0ecSDave Kleikamp ret = err; 5148ac27a0ecSDave Kleikamp return ret; 5149ac27a0ecSDave Kleikamp } 5150ac27a0ecSDave Kleikamp 5151ac27a0ecSDave Kleikamp /* 5152ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5153ac27a0ecSDave Kleikamp * the quota file and such... 5154ac27a0ecSDave Kleikamp */ 5155617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5156ac27a0ecSDave Kleikamp { 5157287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5158617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5159ac27a0ecSDave Kleikamp } 5160ac27a0ecSDave Kleikamp 5161ac27a0ecSDave Kleikamp /* 5162ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5163ac27a0ecSDave Kleikamp */ 5164617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5165f00c9e44SJan Kara struct path *path) 5166ac27a0ecSDave Kleikamp { 5167ac27a0ecSDave Kleikamp int err; 5168ac27a0ecSDave Kleikamp 5169ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5170ac27a0ecSDave Kleikamp return -EINVAL; 51710623543bSJan Kara 5172ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5173d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5174ac27a0ecSDave Kleikamp return -EXDEV; 51750623543bSJan Kara /* Journaling quota? */ 51760623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 51772b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5178f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5179b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5180b31e1552SEric Sandeen "Quota file not on filesystem root. " 5181b31e1552SEric Sandeen "Journaled quota will not work"); 51820623543bSJan Kara } 51830623543bSJan Kara 51840623543bSJan Kara /* 51850623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 51860623543bSJan Kara * all updates to the file when we bypass pagecache... 51870623543bSJan Kara */ 51880390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 5189f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 51900623543bSJan Kara /* 51910623543bSJan Kara * We don't need to lock updates but journal_flush() could 51920623543bSJan Kara * otherwise be livelocked... 51930623543bSJan Kara */ 51940623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 51957ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 51960623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5197f00c9e44SJan Kara if (err) 51987ffe1ea8SHidehiro Kawai return err; 51997ffe1ea8SHidehiro Kawai } 52000623543bSJan Kara 5201f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5202ac27a0ecSDave Kleikamp } 5203ac27a0ecSDave Kleikamp 52047c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 52057c319d32SAditya Kali unsigned int flags) 52067c319d32SAditya Kali { 52077c319d32SAditya Kali int err; 52087c319d32SAditya Kali struct inode *qf_inode; 52097c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 52107c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52117c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52127c319d32SAditya Kali }; 52137c319d32SAditya Kali 52147c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 52157c319d32SAditya Kali 52167c319d32SAditya Kali if (!qf_inums[type]) 52177c319d32SAditya Kali return -EPERM; 52187c319d32SAditya Kali 52197c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 52207c319d32SAditya Kali if (IS_ERR(qf_inode)) { 52217c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 52227c319d32SAditya Kali return PTR_ERR(qf_inode); 52237c319d32SAditya Kali } 52247c319d32SAditya Kali 5225bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5226bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 52277c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 52287c319d32SAditya Kali iput(qf_inode); 52297c319d32SAditya Kali 52307c319d32SAditya Kali return err; 52317c319d32SAditya Kali } 52327c319d32SAditya Kali 52337c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 52347c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 52357c319d32SAditya Kali { 52367c319d32SAditya Kali int type, err = 0; 52377c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 52387c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52397c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52407c319d32SAditya Kali }; 52417c319d32SAditya Kali 52427c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 52437c319d32SAditya Kali for (type = 0; type < MAXQUOTAS; type++) { 52447c319d32SAditya Kali if (qf_inums[type]) { 52457c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 52467c319d32SAditya Kali DQUOT_USAGE_ENABLED); 52477c319d32SAditya Kali if (err) { 52487c319d32SAditya Kali ext4_warning(sb, 524972ba7450STheodore Ts'o "Failed to enable quota tracking " 525072ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 525172ba7450STheodore Ts'o "e2fsck to fix.", type, err); 52527c319d32SAditya Kali return err; 52537c319d32SAditya Kali } 52547c319d32SAditya Kali } 52557c319d32SAditya Kali } 52567c319d32SAditya Kali return 0; 52577c319d32SAditya Kali } 52587c319d32SAditya Kali 52597c319d32SAditya Kali /* 52607c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 52617c319d32SAditya Kali */ 52627c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 52637c319d32SAditya Kali int format_id) 52647c319d32SAditya Kali { 52657c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 52667c319d32SAditya Kali return -EINVAL; 52677c319d32SAditya Kali 52687c319d32SAditya Kali /* 52697c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 52707c319d32SAditya Kali */ 52717c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 52727c319d32SAditya Kali } 52737c319d32SAditya Kali 5274ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5275ca0e05e4SDmitry Monakhov { 527621f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 527721f97697SJan Kara handle_t *handle; 527821f97697SJan Kara 527987009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 528087009d86SDmitry Monakhov * Caller already holds s_umount sem */ 528187009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5282ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5283ca0e05e4SDmitry Monakhov 52840b268590SAmir Goldstein if (!inode) 52850b268590SAmir Goldstein goto out; 52860b268590SAmir Goldstein 528721f97697SJan Kara /* Update modification times of quota files when userspace can 528821f97697SJan Kara * start looking at them */ 52899924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 529021f97697SJan Kara if (IS_ERR(handle)) 529121f97697SJan Kara goto out; 529221f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 529321f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 529421f97697SJan Kara ext4_journal_stop(handle); 529521f97697SJan Kara 529621f97697SJan Kara out: 5297ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5298ca0e05e4SDmitry Monakhov } 5299ca0e05e4SDmitry Monakhov 53007c319d32SAditya Kali /* 53017c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 53027c319d32SAditya Kali */ 53037c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 53047c319d32SAditya Kali { 53057c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 53067c319d32SAditya Kali return -EINVAL; 53077c319d32SAditya Kali 53087c319d32SAditya Kali /* Disable only the limits. */ 53097c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 53107c319d32SAditya Kali } 53117c319d32SAditya Kali 5312ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5313ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5314ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5315ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5316617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5317ac27a0ecSDave Kleikamp size_t len, loff_t off) 5318ac27a0ecSDave Kleikamp { 5319ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5320725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5321ac27a0ecSDave Kleikamp int err = 0; 5322ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5323ac27a0ecSDave Kleikamp int tocopy; 5324ac27a0ecSDave Kleikamp size_t toread; 5325ac27a0ecSDave Kleikamp struct buffer_head *bh; 5326ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5327ac27a0ecSDave Kleikamp 5328ac27a0ecSDave Kleikamp if (off > i_size) 5329ac27a0ecSDave Kleikamp return 0; 5330ac27a0ecSDave Kleikamp if (off+len > i_size) 5331ac27a0ecSDave Kleikamp len = i_size-off; 5332ac27a0ecSDave Kleikamp toread = len; 5333ac27a0ecSDave Kleikamp while (toread > 0) { 5334ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5335ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 5336617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 5337ac27a0ecSDave Kleikamp if (err) 5338ac27a0ecSDave Kleikamp return err; 5339ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5340ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5341ac27a0ecSDave Kleikamp else 5342ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5343ac27a0ecSDave Kleikamp brelse(bh); 5344ac27a0ecSDave Kleikamp offset = 0; 5345ac27a0ecSDave Kleikamp toread -= tocopy; 5346ac27a0ecSDave Kleikamp data += tocopy; 5347ac27a0ecSDave Kleikamp blk++; 5348ac27a0ecSDave Kleikamp } 5349ac27a0ecSDave Kleikamp return len; 5350ac27a0ecSDave Kleikamp } 5351ac27a0ecSDave Kleikamp 5352ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5353ac27a0ecSDave Kleikamp * enough credits) */ 5354617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5355ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5356ac27a0ecSDave Kleikamp { 5357ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5358725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5359ac27a0ecSDave Kleikamp int err = 0; 5360ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5361ac27a0ecSDave Kleikamp struct buffer_head *bh; 5362ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5363ac27a0ecSDave Kleikamp 53640390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5365b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5366b31e1552SEric Sandeen " cancelled because transaction is not started", 53679c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 53689c3013e9SJan Kara return -EIO; 53699c3013e9SJan Kara } 537067eeb568SDmitry Monakhov /* 537167eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 537267eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 537367eeb568SDmitry Monakhov */ 537467eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 537567eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 537667eeb568SDmitry Monakhov " cancelled because not block aligned", 537767eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 537867eeb568SDmitry Monakhov return -EIO; 537967eeb568SDmitry Monakhov } 538067eeb568SDmitry Monakhov 5381617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 5382ac27a0ecSDave Kleikamp if (!bh) 5383ac27a0ecSDave Kleikamp goto out; 5384617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5385ac27a0ecSDave Kleikamp if (err) { 5386ac27a0ecSDave Kleikamp brelse(bh); 5387ac27a0ecSDave Kleikamp goto out; 5388ac27a0ecSDave Kleikamp } 5389ac27a0ecSDave Kleikamp lock_buffer(bh); 539067eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5391ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5392ac27a0ecSDave Kleikamp unlock_buffer(bh); 53930390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5394ac27a0ecSDave Kleikamp brelse(bh); 5395ac27a0ecSDave Kleikamp out: 53960b7f7cefSJan Kara if (err) 5397ac27a0ecSDave Kleikamp return err; 539867eeb568SDmitry Monakhov if (inode->i_size < off + len) { 539967eeb568SDmitry Monakhov i_size_write(inode, off + len); 5400617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5401617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 540221f97697SJan Kara } 540367eeb568SDmitry Monakhov return len; 5404ac27a0ecSDave Kleikamp } 5405ac27a0ecSDave Kleikamp 5406ac27a0ecSDave Kleikamp #endif 5407ac27a0ecSDave Kleikamp 5408152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5409152a0836SAl Viro const char *dev_name, void *data) 5410ac27a0ecSDave Kleikamp { 5411152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5412ac27a0ecSDave Kleikamp } 5413ac27a0ecSDave Kleikamp 541437f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 541524b58424STheodore Ts'o static inline void register_as_ext2(void) 541624b58424STheodore Ts'o { 541724b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 541824b58424STheodore Ts'o if (err) 541924b58424STheodore Ts'o printk(KERN_WARNING 542024b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 542124b58424STheodore Ts'o } 542224b58424STheodore Ts'o 542324b58424STheodore Ts'o static inline void unregister_as_ext2(void) 542424b58424STheodore Ts'o { 542524b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 542624b58424STheodore Ts'o } 54272035e776STheodore Ts'o 54282035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 54292035e776STheodore Ts'o { 54302035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 54312035e776STheodore Ts'o return 0; 54322035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54332035e776STheodore Ts'o return 1; 54342035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 54352035e776STheodore Ts'o return 0; 54362035e776STheodore Ts'o return 1; 54372035e776STheodore Ts'o } 543824b58424STheodore Ts'o #else 543924b58424STheodore Ts'o static inline void register_as_ext2(void) { } 544024b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 54412035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 544224b58424STheodore Ts'o #endif 544324b58424STheodore Ts'o 544437f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 544524b58424STheodore Ts'o static inline void register_as_ext3(void) 544624b58424STheodore Ts'o { 544724b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 544824b58424STheodore Ts'o if (err) 544924b58424STheodore Ts'o printk(KERN_WARNING 545024b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 545124b58424STheodore Ts'o } 545224b58424STheodore Ts'o 545324b58424STheodore Ts'o static inline void unregister_as_ext3(void) 545424b58424STheodore Ts'o { 545524b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 545624b58424STheodore Ts'o } 54572035e776STheodore Ts'o 54582035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 54592035e776STheodore Ts'o { 54602035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 54612035e776STheodore Ts'o return 0; 54622035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 54632035e776STheodore Ts'o return 0; 54642035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54652035e776STheodore Ts'o return 1; 54662035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 54672035e776STheodore Ts'o return 0; 54682035e776STheodore Ts'o return 1; 54692035e776STheodore Ts'o } 547024b58424STheodore Ts'o #else 547124b58424STheodore Ts'o static inline void register_as_ext3(void) { } 547224b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 54732035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 547424b58424STheodore Ts'o #endif 547524b58424STheodore Ts'o 547603010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5477ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 547803010a33STheodore Ts'o .name = "ext4", 5479152a0836SAl Viro .mount = ext4_mount, 5480ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5481ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5482ac27a0ecSDave Kleikamp }; 54837f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5484ac27a0ecSDave Kleikamp 54858f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5486857ac889SLukas Czerner { 5487857ac889SLukas Czerner struct ext4_features *ef; 5488857ac889SLukas Czerner int ret = -ENOMEM; 5489857ac889SLukas Czerner 5490857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5491857ac889SLukas Czerner if (!ef) 5492857ac889SLukas Czerner goto out; 5493857ac889SLukas Czerner 5494857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5495857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5496857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5497857ac889SLukas Czerner "features"); 5498857ac889SLukas Czerner if (ret) { 5499857ac889SLukas Czerner kfree(ef); 5500857ac889SLukas Czerner goto out; 5501857ac889SLukas Czerner } 5502857ac889SLukas Czerner 5503857ac889SLukas Czerner ext4_feat = ef; 5504857ac889SLukas Czerner ret = 0; 5505857ac889SLukas Czerner out: 5506857ac889SLukas Czerner return ret; 5507857ac889SLukas Czerner } 5508857ac889SLukas Czerner 55098f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 55108f021222SLukas Czerner { 55118f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 55128f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 55138f021222SLukas Czerner kfree(ext4_feat); 55148f021222SLukas Czerner } 55158f021222SLukas Czerner 5516e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5517e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5518e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5519e9e3bcecSEric Sandeen 55205dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5521ac27a0ecSDave Kleikamp { 5522e9e3bcecSEric Sandeen int i, err; 5523c9de560dSAlex Tomas 552407c0c5d8SAl Viro ext4_li_info = NULL; 552507c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 552607c0c5d8SAl Viro 55279a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 552812e9b892SDmitry Monakhov ext4_check_flag_values(); 5529e9e3bcecSEric Sandeen 5530e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5531e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5532e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5533e9e3bcecSEric Sandeen } 5534e9e3bcecSEric Sandeen 553551865fdaSZheng Liu err = ext4_init_es(); 55366fd058f7STheodore Ts'o if (err) 55376fd058f7STheodore Ts'o return err; 553851865fdaSZheng Liu 553951865fdaSZheng Liu err = ext4_init_pageio(); 554051865fdaSZheng Liu if (err) 554151865fdaSZheng Liu goto out7; 554251865fdaSZheng Liu 55435dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5544bd2d0210STheodore Ts'o if (err) 5545d44651d0SFabrice Jouhaud goto out6; 55463197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 55470e376b1eSTheodore Ts'o if (!ext4_kset) { 55480e376b1eSTheodore Ts'o err = -ENOMEM; 5549dd68314cSTheodore Ts'o goto out5; 55500e376b1eSTheodore Ts'o } 5551d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5552857ac889SLukas Czerner 5553857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5554dd68314cSTheodore Ts'o if (err) 5555dd68314cSTheodore Ts'o goto out4; 5556857ac889SLukas Czerner 55575dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5558ac27a0ecSDave Kleikamp if (err) 5559c9de560dSAlex Tomas goto out2; 55609c191f70ST Makphaibulchoke else 55619c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5562ac27a0ecSDave Kleikamp err = init_inodecache(); 5563ac27a0ecSDave Kleikamp if (err) 5564ac27a0ecSDave Kleikamp goto out1; 556524b58424STheodore Ts'o register_as_ext3(); 55662035e776STheodore Ts'o register_as_ext2(); 556703010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5568ac27a0ecSDave Kleikamp if (err) 5569ac27a0ecSDave Kleikamp goto out; 5570bfff6873SLukas Czerner 5571ac27a0ecSDave Kleikamp return 0; 5572ac27a0ecSDave Kleikamp out: 557324b58424STheodore Ts'o unregister_as_ext2(); 557424b58424STheodore Ts'o unregister_as_ext3(); 5575ac27a0ecSDave Kleikamp destroy_inodecache(); 5576ac27a0ecSDave Kleikamp out1: 55779c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 55785dabfc78STheodore Ts'o ext4_exit_mballoc(); 55799c191f70ST Makphaibulchoke out2: 55808f021222SLukas Czerner ext4_exit_feat_adverts(); 55816fd058f7STheodore Ts'o out4: 5582d44651d0SFabrice Jouhaud if (ext4_proc_root) 5583dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5584dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5585d44651d0SFabrice Jouhaud out5: 5586dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5587d44651d0SFabrice Jouhaud out6: 55885dabfc78STheodore Ts'o ext4_exit_pageio(); 558951865fdaSZheng Liu out7: 559051865fdaSZheng Liu ext4_exit_es(); 559151865fdaSZheng Liu 5592ac27a0ecSDave Kleikamp return err; 5593ac27a0ecSDave Kleikamp } 5594ac27a0ecSDave Kleikamp 55955dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5596ac27a0ecSDave Kleikamp { 5597bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 559824b58424STheodore Ts'o unregister_as_ext2(); 559924b58424STheodore Ts'o unregister_as_ext3(); 560003010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5601ac27a0ecSDave Kleikamp destroy_inodecache(); 56025dabfc78STheodore Ts'o ext4_exit_mballoc(); 56038f021222SLukas Czerner ext4_exit_feat_adverts(); 56049f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 56053197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 56065dabfc78STheodore Ts'o ext4_exit_system_zone(); 56075dabfc78STheodore Ts'o ext4_exit_pageio(); 5608dd12ed14SEric Sandeen ext4_exit_es(); 5609ac27a0ecSDave Kleikamp } 5610ac27a0ecSDave Kleikamp 5611ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 561283982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5613ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 56145dabfc78STheodore Ts'o module_init(ext4_init_fs) 56155dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5616