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 141c197855eSStephen Hemminger static 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); 823ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 824ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 825a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 826ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 827ac27a0ecSDave Kleikamp #endif 828ac27a0ecSDave Kleikamp 829ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 830ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 831ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 832ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 833ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 834ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 835ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 836ac27a0ecSDave Kleikamp 837f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 838ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 839ac27a0ecSDave Kleikamp /* 840ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 841ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 842ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 843ac27a0ecSDave Kleikamp */ 844ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 845f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 846617ba13bSMingming Cao ext4_blkdev_remove(sbi); 847ac27a0ecSDave Kleikamp } 8489c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 8499c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 8509c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 8519c191f70ST Makphaibulchoke } 852c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 853c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 854ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8553197ebdbSTheodore Ts'o /* 8563197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8573197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8583197ebdbSTheodore Ts'o */ 8593197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8603197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 8610441984aSDarrick J. Wong if (sbi->s_chksum_driver) 8620441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 863705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 864ac27a0ecSDave Kleikamp kfree(sbi); 865ac27a0ecSDave Kleikamp } 866ac27a0ecSDave Kleikamp 867e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 868ac27a0ecSDave Kleikamp 869ac27a0ecSDave Kleikamp /* 870ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 871ac27a0ecSDave Kleikamp */ 872617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 873ac27a0ecSDave Kleikamp { 874617ba13bSMingming Cao struct ext4_inode_info *ei; 875ac27a0ecSDave Kleikamp 876e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 877ac27a0ecSDave Kleikamp if (!ei) 878ac27a0ecSDave Kleikamp return NULL; 8790b8e58a1SAndreas Dilger 880ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 881202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 882c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 883c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8849a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 8859a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 88674cd15cdSZheng Liu INIT_LIST_HEAD(&ei->i_es_lru); 887eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 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 sbi->s_max_batch_time = arg; 152926092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 153026092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 153126092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1532e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1533e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1534e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1535e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 153626092bf5STheodore Ts'o return -1; 153726092bf5STheodore Ts'o } 153826092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 153926092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 154026092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 154126092bf5STheodore Ts'o if (!args->from) 154226092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 154326092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1544df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1545df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 154626092bf5STheodore Ts'o } else if (token == Opt_stripe) { 154726092bf5STheodore Ts'o sbi->s_stripe = arg; 15480efb3b23SJan Kara } else if (token == Opt_resuid) { 15490efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15500efb3b23SJan Kara if (!uid_valid(uid)) { 15515f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15520efb3b23SJan Kara return -1; 15530efb3b23SJan Kara } 15540efb3b23SJan Kara sbi->s_resuid = uid; 15550efb3b23SJan Kara } else if (token == Opt_resgid) { 15560efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15570efb3b23SJan Kara if (!gid_valid(gid)) { 15585f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15590efb3b23SJan Kara return -1; 15600efb3b23SJan Kara } 15610efb3b23SJan Kara sbi->s_resgid = gid; 15620efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15630efb3b23SJan Kara if (is_remount) { 15640efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15650efb3b23SJan Kara "Cannot specify journal on remount"); 15660efb3b23SJan Kara return -1; 15670efb3b23SJan Kara } 15680efb3b23SJan Kara *journal_devnum = arg; 1569ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1570ad4eec61SEric Sandeen char *journal_path; 1571ad4eec61SEric Sandeen struct inode *journal_inode; 1572ad4eec61SEric Sandeen struct path path; 1573ad4eec61SEric Sandeen int error; 1574ad4eec61SEric Sandeen 1575ad4eec61SEric Sandeen if (is_remount) { 1576ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1577ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1578ad4eec61SEric Sandeen return -1; 1579ad4eec61SEric Sandeen } 1580ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1581ad4eec61SEric Sandeen if (!journal_path) { 1582ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1583ad4eec61SEric Sandeen "journal device string"); 1584ad4eec61SEric Sandeen return -1; 1585ad4eec61SEric Sandeen } 1586ad4eec61SEric Sandeen 1587ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1588ad4eec61SEric Sandeen if (error) { 1589ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1590ad4eec61SEric Sandeen "journal device path: error %d", error); 1591ad4eec61SEric Sandeen kfree(journal_path); 1592ad4eec61SEric Sandeen return -1; 1593ad4eec61SEric Sandeen } 1594ad4eec61SEric Sandeen 1595ad4eec61SEric Sandeen journal_inode = path.dentry->d_inode; 1596ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1597ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1598ad4eec61SEric Sandeen "is not a block device", journal_path); 1599ad4eec61SEric Sandeen path_put(&path); 1600ad4eec61SEric Sandeen kfree(journal_path); 1601ad4eec61SEric Sandeen return -1; 1602ad4eec61SEric Sandeen } 1603ad4eec61SEric Sandeen 1604ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1605ad4eec61SEric Sandeen path_put(&path); 1606ad4eec61SEric Sandeen kfree(journal_path); 16070efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 16080efb3b23SJan Kara if (arg > 7) { 16095f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 16100efb3b23SJan Kara " (must be 0-7)"); 16110efb3b23SJan Kara return -1; 16120efb3b23SJan Kara } 16130efb3b23SJan Kara *journal_ioprio = 16140efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 161526092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 161626092bf5STheodore Ts'o if (is_remount) { 161726092bf5STheodore Ts'o if (!sbi->s_journal) 161826092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 16195f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 162026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 162126092bf5STheodore Ts'o "Cannot change data mode on remount"); 162226092bf5STheodore Ts'o return -1; 162326092bf5STheodore Ts'o } 162426092bf5STheodore Ts'o } else { 162526092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 162626092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 162726092bf5STheodore Ts'o } 162826092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 162926092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 163026092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 163126092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16325f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16335f3633e3SJan Kara "quota options when quota turned on"); 163426092bf5STheodore Ts'o return -1; 163526092bf5STheodore Ts'o } 1636262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1637262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1638262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1639262b4662SJan Kara "Cannot set journaled quota options " 1640262b4662SJan Kara "when QUOTA feature is enabled"); 1641262b4662SJan Kara return -1; 1642262b4662SJan Kara } 164326092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 164426092bf5STheodore Ts'o #endif 164526092bf5STheodore Ts'o } else { 164626092bf5STheodore Ts'o if (!args->from) 164726092bf5STheodore Ts'o arg = 1; 164826092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 164926092bf5STheodore Ts'o arg = !arg; 165026092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 165126092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 165226092bf5STheodore Ts'o "buggy handling of option %s", opt); 165326092bf5STheodore Ts'o WARN_ON(1); 165426092bf5STheodore Ts'o return -1; 165526092bf5STheodore Ts'o } 165626092bf5STheodore Ts'o if (arg != 0) 165726092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 165826092bf5STheodore Ts'o else 165926092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 166026092bf5STheodore Ts'o } 166126092bf5STheodore Ts'o return 1; 166226092bf5STheodore Ts'o } 166326092bf5STheodore Ts'o 1664ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1665c3191067STheodore Ts'o unsigned long *journal_devnum, 1666b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1667661aa520SEric Sandeen int is_remount) 1668ac27a0ecSDave Kleikamp { 1669617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1670ac27a0ecSDave Kleikamp char *p; 1671ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 167226092bf5STheodore Ts'o int token; 1673ac27a0ecSDave Kleikamp 1674ac27a0ecSDave Kleikamp if (!options) 1675ac27a0ecSDave Kleikamp return 1; 1676ac27a0ecSDave Kleikamp 1677ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1678ac27a0ecSDave Kleikamp if (!*p) 1679ac27a0ecSDave Kleikamp continue; 168015121c18SEric Sandeen /* 168115121c18SEric Sandeen * Initialize args struct so we know whether arg was 168215121c18SEric Sandeen * found; some options take optional arguments. 168315121c18SEric Sandeen */ 1684caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1685ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 168626092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 168726092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1688ac27a0ecSDave Kleikamp return 0; 1689ac27a0ecSDave Kleikamp } 1690ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1691262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1692262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1693262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1694262b4662SJan Kara "feature is enabled"); 1695262b4662SJan Kara return 0; 1696262b4662SJan Kara } 1697ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1698482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1699fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1700ac27a0ecSDave Kleikamp 1701482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1702fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1703ac27a0ecSDave Kleikamp 170456c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1705b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1706b31e1552SEric Sandeen "format mixing"); 1707ac27a0ecSDave Kleikamp return 0; 1708ac27a0ecSDave Kleikamp } 1709ac27a0ecSDave Kleikamp 1710ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1711b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1712b31e1552SEric Sandeen "not specified"); 1713ac27a0ecSDave Kleikamp return 0; 1714ac27a0ecSDave Kleikamp } 1715ac27a0ecSDave Kleikamp } else { 1716ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1717b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 17182c8be6b2SJan Kara "specified with no journaling " 1719b31e1552SEric Sandeen "enabled"); 1720ac27a0ecSDave Kleikamp return 0; 1721ac27a0ecSDave Kleikamp } 1722ac27a0ecSDave Kleikamp } 1723ac27a0ecSDave Kleikamp #endif 1724261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1725261cb20cSJan Kara int blocksize = 1726261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1727261cb20cSJan Kara 1728261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1729261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1730261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1731261cb20cSJan Kara return 0; 1732261cb20cSJan Kara } 1733261cb20cSJan Kara } 1734ac27a0ecSDave Kleikamp return 1; 1735ac27a0ecSDave Kleikamp } 1736ac27a0ecSDave Kleikamp 17372adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17382adf6da8STheodore Ts'o struct super_block *sb) 17392adf6da8STheodore Ts'o { 17402adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17412adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17422adf6da8STheodore Ts'o 17432adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17442adf6da8STheodore Ts'o char *fmtname = ""; 17452adf6da8STheodore Ts'o 17462adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17472adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17482adf6da8STheodore Ts'o fmtname = "vfsold"; 17492adf6da8STheodore Ts'o break; 17502adf6da8STheodore Ts'o case QFMT_VFS_V0: 17512adf6da8STheodore Ts'o fmtname = "vfsv0"; 17522adf6da8STheodore Ts'o break; 17532adf6da8STheodore Ts'o case QFMT_VFS_V1: 17542adf6da8STheodore Ts'o fmtname = "vfsv1"; 17552adf6da8STheodore Ts'o break; 17562adf6da8STheodore Ts'o } 17572adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17582adf6da8STheodore Ts'o } 17592adf6da8STheodore Ts'o 17602adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17612adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17622adf6da8STheodore Ts'o 17632adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17642adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17652adf6da8STheodore Ts'o #endif 17662adf6da8STheodore Ts'o } 17672adf6da8STheodore Ts'o 17685a916be1STheodore Ts'o static const char *token2str(int token) 17695a916be1STheodore Ts'o { 177050df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17715a916be1STheodore Ts'o 17725a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17735a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17745a916be1STheodore Ts'o break; 17755a916be1STheodore Ts'o return t->pattern; 17765a916be1STheodore Ts'o } 17775a916be1STheodore Ts'o 17782adf6da8STheodore Ts'o /* 17792adf6da8STheodore Ts'o * Show an option if 17802adf6da8STheodore Ts'o * - it's set to a non-default value OR 17812adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17822adf6da8STheodore Ts'o */ 178366acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 178466acdcf4STheodore Ts'o int nodefs) 17852adf6da8STheodore Ts'o { 17862adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17872adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 178866acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17895a916be1STheodore Ts'o const struct mount_opts *m; 179066acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17912adf6da8STheodore Ts'o 179266acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 179366acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17942adf6da8STheodore Ts'o 17952adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17965a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17975a916be1STheodore Ts'o 17985a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17995a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 18005a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 18015a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 18025a916be1STheodore Ts'o continue; 180366acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 18045a916be1STheodore Ts'o continue; /* skip if same as the default */ 18055a916be1STheodore Ts'o if ((want_set && 18065a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 18075a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 18085a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 18095a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 18105a916be1STheodore Ts'o } 18115a916be1STheodore Ts'o 181208cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 18135a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 181408cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 181508cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 181608cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 18175a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 181808cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 181908cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 182066acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 18215a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18225a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18232adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18245a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18252adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18265a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 182766acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18285a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 182966acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18305a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 183166acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18325a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18332adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18345a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 183566acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18365a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 183766acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18382adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18395a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18402adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18415a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18422adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18435a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18445a916be1STheodore Ts'o } 184566acdcf4STheodore Ts'o if (nodefs || 184666acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18475a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18482adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18492adf6da8STheodore Ts'o 185066acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 185166acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18525a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1853df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1854df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18552adf6da8STheodore Ts'o 18562adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18572adf6da8STheodore Ts'o return 0; 18582adf6da8STheodore Ts'o } 18592adf6da8STheodore Ts'o 186066acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 186166acdcf4STheodore Ts'o { 186266acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 186366acdcf4STheodore Ts'o } 186466acdcf4STheodore Ts'o 186566acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 186666acdcf4STheodore Ts'o { 186766acdcf4STheodore Ts'o struct super_block *sb = seq->private; 186866acdcf4STheodore Ts'o int rc; 186966acdcf4STheodore Ts'o 187066acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 187166acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 187266acdcf4STheodore Ts'o seq_puts(seq, "\n"); 187366acdcf4STheodore Ts'o return rc; 187466acdcf4STheodore Ts'o } 187566acdcf4STheodore Ts'o 187666acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 187766acdcf4STheodore Ts'o { 1878d9dda78bSAl Viro return single_open(file, options_seq_show, PDE_DATA(inode)); 187966acdcf4STheodore Ts'o } 188066acdcf4STheodore Ts'o 188166acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 188266acdcf4STheodore Ts'o .owner = THIS_MODULE, 188366acdcf4STheodore Ts'o .open = options_open_fs, 188466acdcf4STheodore Ts'o .read = seq_read, 188566acdcf4STheodore Ts'o .llseek = seq_lseek, 188666acdcf4STheodore Ts'o .release = single_release, 188766acdcf4STheodore Ts'o }; 188866acdcf4STheodore Ts'o 1889617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1890ac27a0ecSDave Kleikamp int read_only) 1891ac27a0ecSDave Kleikamp { 1892617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1893ac27a0ecSDave Kleikamp int res = 0; 1894ac27a0ecSDave Kleikamp 1895617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1896b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1897b31e1552SEric Sandeen "forcing read-only mode"); 1898ac27a0ecSDave Kleikamp res = MS_RDONLY; 1899ac27a0ecSDave Kleikamp } 1900ac27a0ecSDave Kleikamp if (read_only) 1901281b5995STheodore Ts'o goto done; 1902617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1903b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1904b31e1552SEric Sandeen "running e2fsck is recommended"); 1905c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 1906b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1907b31e1552SEric Sandeen "warning: mounting fs with errors, " 1908b31e1552SEric Sandeen "running e2fsck is recommended"); 1909ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1910ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1911ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1912b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1913b31e1552SEric Sandeen "warning: maximal mount count reached, " 1914b31e1552SEric Sandeen "running e2fsck is recommended"); 1915ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1916ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1917ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1918b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1919b31e1552SEric Sandeen "warning: checktime reached, " 1920b31e1552SEric Sandeen "running e2fsck is recommended"); 19210390131bSFrank Mayhar if (!sbi->s_journal) 1922216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1923ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1924617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1925e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1926ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1927617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19280390131bSFrank Mayhar if (sbi->s_journal) 1929617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1930ac27a0ecSDave Kleikamp 1931e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1932281b5995STheodore Ts'o done: 1933ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1934a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1935a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1936ac27a0ecSDave Kleikamp sb->s_blocksize, 1937ac27a0ecSDave Kleikamp sbi->s_groups_count, 1938617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1939617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1940a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1941ac27a0ecSDave Kleikamp 19427abc52c2SDan Magenheimer cleancache_init_fs(sb); 1943ac27a0ecSDave Kleikamp return res; 1944ac27a0ecSDave Kleikamp } 1945ac27a0ecSDave Kleikamp 1946117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1947117fff10STheodore Ts'o { 1948117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1949117fff10STheodore Ts'o struct flex_groups *new_groups; 1950117fff10STheodore Ts'o int size; 1951117fff10STheodore Ts'o 1952117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1953117fff10STheodore Ts'o return 0; 1954117fff10STheodore Ts'o 1955117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1956117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1957117fff10STheodore Ts'o return 0; 1958117fff10STheodore Ts'o 1959117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1960117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1961117fff10STheodore Ts'o if (!new_groups) { 1962117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1963117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1964117fff10STheodore Ts'o return -ENOMEM; 1965117fff10STheodore Ts'o } 1966117fff10STheodore Ts'o 1967117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1968117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1969117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1970117fff10STheodore Ts'o sizeof(struct flex_groups))); 1971117fff10STheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 1972117fff10STheodore Ts'o } 1973117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1974117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1975117fff10STheodore Ts'o return 0; 1976117fff10STheodore Ts'o } 1977117fff10STheodore Ts'o 1978772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1979772cb7c8SJose R. Santos { 1980772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1981772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1982772cb7c8SJose R. Santos ext4_group_t flex_group; 1983117fff10STheodore Ts'o int i, err; 1984772cb7c8SJose R. Santos 1985503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1986d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1987772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1988772cb7c8SJose R. Santos return 1; 1989772cb7c8SJose R. Santos } 1990772cb7c8SJose R. Santos 1991117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1992117fff10STheodore Ts'o if (err) 1993772cb7c8SJose R. Santos goto failed; 1994772cb7c8SJose R. Santos 1995772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 199688b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1997772cb7c8SJose R. Santos 1998772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19997ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 20007ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 200190ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 200224aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 20037ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 20047ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2005772cb7c8SJose R. Santos } 2006772cb7c8SJose R. Santos 2007772cb7c8SJose R. Santos return 1; 2008772cb7c8SJose R. Santos failed: 2009772cb7c8SJose R. Santos return 0; 2010772cb7c8SJose R. Santos } 2011772cb7c8SJose R. Santos 2012feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 2013717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2014717d50e4SAndreas Dilger { 2015feb0ab32SDarrick J. Wong int offset; 2016717d50e4SAndreas Dilger __u16 crc = 0; 2017717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2018717d50e4SAndreas Dilger 2019feb0ab32SDarrick J. Wong if ((sbi->s_es->s_feature_ro_compat & 2020feb0ab32SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { 2021feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2022d6a77105STheodore Ts'o __le16 save_csum; 2023feb0ab32SDarrick J. Wong __u32 csum32; 2024feb0ab32SDarrick J. Wong 2025d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 2026feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 2027feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2028feb0ab32SDarrick J. Wong sizeof(le_group)); 2029feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2030feb0ab32SDarrick J. Wong sbi->s_desc_size); 2031d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 2032feb0ab32SDarrick J. Wong 2033feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2034feb0ab32SDarrick J. Wong goto out; 2035feb0ab32SDarrick J. Wong } 2036feb0ab32SDarrick J. Wong 2037feb0ab32SDarrick J. Wong /* old crc16 code */ 2038feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2039feb0ab32SDarrick J. Wong 2040717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2041717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2042717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2043717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2044717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2045717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2046717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2047717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2048717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2049717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2050717d50e4SAndreas Dilger offset); 2051717d50e4SAndreas Dilger 2052feb0ab32SDarrick J. Wong out: 2053717d50e4SAndreas Dilger return cpu_to_le16(crc); 2054717d50e4SAndreas Dilger } 2055717d50e4SAndreas Dilger 2056feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2057717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2058717d50e4SAndreas Dilger { 2059feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2060feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2061feb0ab32SDarrick J. Wong block_group, gdp))) 2062717d50e4SAndreas Dilger return 0; 2063717d50e4SAndreas Dilger 2064717d50e4SAndreas Dilger return 1; 2065717d50e4SAndreas Dilger } 2066717d50e4SAndreas Dilger 2067feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2068feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2069feb0ab32SDarrick J. Wong { 2070feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2071feb0ab32SDarrick J. Wong return; 2072feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2073feb0ab32SDarrick J. Wong } 2074feb0ab32SDarrick J. Wong 2075ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2076bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2077bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2078ac27a0ecSDave Kleikamp { 2079617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2080617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2081617ba13bSMingming Cao ext4_fsblk_t last_block; 2082bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2083bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2084bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2085ce421581SJose R. Santos int flexbg_flag = 0; 2086bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2087ac27a0ecSDave Kleikamp 2088ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2089ce421581SJose R. Santos flexbg_flag = 1; 2090ce421581SJose R. Santos 2091617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2092ac27a0ecSDave Kleikamp 2093197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2094197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2095197cd65aSAkinobu Mita 2096ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2097bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2098ac27a0ecSDave Kleikamp else 2099ac27a0ecSDave Kleikamp last_block = first_block + 2100617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2101ac27a0ecSDave Kleikamp 2102bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2103bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2104bfff6873SLukas Czerner grp = i; 2105bfff6873SLukas Czerner 21068fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 21072b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2108b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2109a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2110b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2111ac27a0ecSDave Kleikamp return 0; 2112ac27a0ecSDave Kleikamp } 21138fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 21142b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2115b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2116a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2117b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2118ac27a0ecSDave Kleikamp return 0; 2119ac27a0ecSDave Kleikamp } 21208fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2121bd81d8eeSLaurent Vivier if (inode_table < first_block || 21222b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2123b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2124a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2125b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2126ac27a0ecSDave Kleikamp return 0; 2127ac27a0ecSDave Kleikamp } 2128955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2129feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2130b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2131b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2132fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2133fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21347ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2135955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2136717d50e4SAndreas Dilger return 0; 2137717d50e4SAndreas Dilger } 21387ee1ec4cSLi Zefan } 2139955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2140ce421581SJose R. Santos if (!flexbg_flag) 2141617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2142ac27a0ecSDave Kleikamp } 2143bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2144bfff6873SLukas Czerner *first_not_zeroed = grp; 2145ac27a0ecSDave Kleikamp return 1; 2146ac27a0ecSDave Kleikamp } 2147ac27a0ecSDave Kleikamp 2148617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2149ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2150ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2151ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2152ac27a0ecSDave Kleikamp * 2153ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2154ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2155ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2156ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2157ac27a0ecSDave Kleikamp * 2158ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2159ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2160ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2161617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2162ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2163ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2164ac27a0ecSDave Kleikamp */ 2165617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2166617ba13bSMingming Cao struct ext4_super_block *es) 2167ac27a0ecSDave Kleikamp { 2168ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2169ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2170ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2171ac27a0ecSDave Kleikamp int i; 2172ac27a0ecSDave Kleikamp #endif 2173ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2174ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2175ac27a0ecSDave Kleikamp return; 2176ac27a0ecSDave Kleikamp } 2177ac27a0ecSDave Kleikamp 2178a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2179b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2180b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2181a8f48a95SEric Sandeen return; 2182a8f48a95SEric Sandeen } 2183a8f48a95SEric Sandeen 2184d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2185d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2186d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2187d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2188d39195c3SAmir Goldstein return; 2189d39195c3SAmir Goldstein } 2190d39195c3SAmir Goldstein 2191617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2192c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2193c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 2194ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2195ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2196ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2197c25f9bc6SEric Sandeen } 2198ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2199ac27a0ecSDave Kleikamp return; 2200ac27a0ecSDave Kleikamp } 2201ac27a0ecSDave Kleikamp 2202ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2203b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2204ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2205ac27a0ecSDave Kleikamp } 2206ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2207ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2208ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2209ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2210a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2211617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2212617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2213ac27a0ecSDave Kleikamp if (ret < 0) 2214b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2215b31e1552SEric Sandeen "Cannot turn on journaled " 2216b31e1552SEric Sandeen "quota: error %d", ret); 2217ac27a0ecSDave Kleikamp } 2218ac27a0ecSDave Kleikamp } 2219ac27a0ecSDave Kleikamp #endif 2220ac27a0ecSDave Kleikamp 2221ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2222ac27a0ecSDave Kleikamp struct inode *inode; 2223ac27a0ecSDave Kleikamp 222497bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 222597bd42b9SJosef Bacik if (IS_ERR(inode)) { 2226ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2227ac27a0ecSDave Kleikamp break; 2228ac27a0ecSDave Kleikamp } 2229ac27a0ecSDave Kleikamp 2230617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2231871a2931SChristoph Hellwig dquot_initialize(inode); 2232ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2233566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2234b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2235b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 223646e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2237e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2238ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2239721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 224055f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2241617ba13bSMingming Cao ext4_truncate(inode); 2242721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2243ac27a0ecSDave Kleikamp nr_truncates++; 2244ac27a0ecSDave Kleikamp } else { 2245566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2246b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2247b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 224846e665e9SHarvey Harrison __func__, inode->i_ino); 2249ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2250ac27a0ecSDave Kleikamp inode->i_ino); 2251ac27a0ecSDave Kleikamp nr_orphans++; 2252ac27a0ecSDave Kleikamp } 2253ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2254ac27a0ecSDave Kleikamp } 2255ac27a0ecSDave Kleikamp 2256ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2257ac27a0ecSDave Kleikamp 2258ac27a0ecSDave Kleikamp if (nr_orphans) 2259b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2260b31e1552SEric Sandeen PLURAL(nr_orphans)); 2261ac27a0ecSDave Kleikamp if (nr_truncates) 2262b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2263b31e1552SEric Sandeen PLURAL(nr_truncates)); 2264ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2265ac27a0ecSDave Kleikamp /* Turn quotas off */ 2266a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2267ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2268287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2269ac27a0ecSDave Kleikamp } 2270ac27a0ecSDave Kleikamp #endif 2271ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2272ac27a0ecSDave Kleikamp } 22730b8e58a1SAndreas Dilger 2274cd2291a4SEric Sandeen /* 2275cd2291a4SEric Sandeen * Maximal extent format file size. 2276cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2277cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2278cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2279cd2291a4SEric Sandeen * so that won't be a limiting factor. 2280cd2291a4SEric Sandeen * 2281f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2282f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2283f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2284f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2285f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2286f17722f9SLukas Czerner * 2287cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2288cd2291a4SEric Sandeen */ 2289f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2290cd2291a4SEric Sandeen { 2291cd2291a4SEric Sandeen loff_t res; 2292cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2293cd2291a4SEric Sandeen 2294cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2295f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2296cd2291a4SEric Sandeen /* 229790c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2298cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2299cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2300cd2291a4SEric Sandeen */ 2301cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2302cd2291a4SEric Sandeen 2303cd2291a4SEric Sandeen /* total blocks in file system block size */ 2304cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2305cd2291a4SEric Sandeen upper_limit <<= blkbits; 2306cd2291a4SEric Sandeen } 2307cd2291a4SEric Sandeen 2308f17722f9SLukas Czerner /* 2309f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2310f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2311f17722f9SLukas Czerner * size 2312f17722f9SLukas Czerner */ 2313f17722f9SLukas Czerner res = (1LL << 32) - 1; 2314cd2291a4SEric Sandeen res <<= blkbits; 2315cd2291a4SEric Sandeen 2316cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2317cd2291a4SEric Sandeen if (res > upper_limit) 2318cd2291a4SEric Sandeen res = upper_limit; 2319cd2291a4SEric Sandeen 2320cd2291a4SEric Sandeen return res; 2321cd2291a4SEric Sandeen } 2322ac27a0ecSDave Kleikamp 2323ac27a0ecSDave Kleikamp /* 2324cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23250fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23260fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2327ac27a0ecSDave Kleikamp */ 2328f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2329ac27a0ecSDave Kleikamp { 2330617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23310fc1b451SAneesh Kumar K.V int meta_blocks; 23320fc1b451SAneesh Kumar K.V loff_t upper_limit; 23330b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23340b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23350b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23360b8e58a1SAndreas Dilger * 23370b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23380b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23390fc1b451SAneesh Kumar K.V */ 23400fc1b451SAneesh Kumar K.V 2341f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23420fc1b451SAneesh Kumar K.V /* 234390c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23440b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23450b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23460fc1b451SAneesh Kumar K.V */ 23470fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23480fc1b451SAneesh Kumar K.V 23490fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23500fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23510fc1b451SAneesh Kumar K.V 23520fc1b451SAneesh Kumar K.V } else { 23538180a562SAneesh Kumar K.V /* 23548180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23558180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23568180a562SAneesh Kumar K.V * represent total number of blocks in 23578180a562SAneesh Kumar K.V * file system block size 23588180a562SAneesh Kumar K.V */ 23590fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23600fc1b451SAneesh Kumar K.V 23610fc1b451SAneesh Kumar K.V } 23620fc1b451SAneesh Kumar K.V 23630fc1b451SAneesh Kumar K.V /* indirect blocks */ 23640fc1b451SAneesh Kumar K.V meta_blocks = 1; 23650fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23660fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23670fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23680fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23690fc1b451SAneesh Kumar K.V 23700fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23710fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2372ac27a0ecSDave Kleikamp 2373ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2374ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2375ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2376ac27a0ecSDave Kleikamp res <<= bits; 2377ac27a0ecSDave Kleikamp if (res > upper_limit) 2378ac27a0ecSDave Kleikamp res = upper_limit; 23790fc1b451SAneesh Kumar K.V 23800fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23810fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23820fc1b451SAneesh Kumar K.V 2383ac27a0ecSDave Kleikamp return res; 2384ac27a0ecSDave Kleikamp } 2385ac27a0ecSDave Kleikamp 2386617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 238770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2388ac27a0ecSDave Kleikamp { 2389617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2390fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2391ac27a0ecSDave Kleikamp int has_super = 0; 2392ac27a0ecSDave Kleikamp 2393ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2394ac27a0ecSDave Kleikamp 2395617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2396ac27a0ecSDave Kleikamp nr < first_meta_bg) 239770bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2398ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2399617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2400ac27a0ecSDave Kleikamp has_super = 1; 24010b8e58a1SAndreas Dilger 2402bd63f6b0SDarrick J. Wong /* 2403bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2404bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2405bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2406bd63f6b0SDarrick J. Wong * compensate. 2407bd63f6b0SDarrick J. Wong */ 2408bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2409bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2410bd63f6b0SDarrick J. Wong has_super++; 2411bd63f6b0SDarrick J. Wong 2412617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2413ac27a0ecSDave Kleikamp } 2414ac27a0ecSDave Kleikamp 2415c9de560dSAlex Tomas /** 2416c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2417c9de560dSAlex Tomas * @sbi: In memory super block info 2418c9de560dSAlex Tomas * 2419c9de560dSAlex Tomas * If we have specified it via mount option, then 2420c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2421c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2422c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2423c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2424c9de560dSAlex Tomas * 2425c9de560dSAlex Tomas */ 2426c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2427c9de560dSAlex Tomas { 2428c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2429c9de560dSAlex Tomas unsigned long stripe_width = 2430c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24313eb08658SDan Ehrenberg int ret; 2432c9de560dSAlex Tomas 2433c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24343eb08658SDan Ehrenberg ret = sbi->s_stripe; 24353eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24363eb08658SDan Ehrenberg ret = stripe_width; 24373eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24383eb08658SDan Ehrenberg ret = stride; 24393eb08658SDan Ehrenberg else 24403eb08658SDan Ehrenberg ret = 0; 2441c9de560dSAlex Tomas 24423eb08658SDan Ehrenberg /* 24433eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24443eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24453eb08658SDan Ehrenberg */ 24463eb08658SDan Ehrenberg if (ret <= 1) 24473eb08658SDan Ehrenberg ret = 0; 2448c9de560dSAlex Tomas 24493eb08658SDan Ehrenberg return ret; 2450c9de560dSAlex Tomas } 2451ac27a0ecSDave Kleikamp 24523197ebdbSTheodore Ts'o /* sysfs supprt */ 24533197ebdbSTheodore Ts'o 24543197ebdbSTheodore Ts'o struct ext4_attr { 24553197ebdbSTheodore Ts'o struct attribute attr; 24563197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24573197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24583197ebdbSTheodore Ts'o const char *, size_t); 2459f2d50a65SJan Kara union { 24603197ebdbSTheodore Ts'o int offset; 2461f2d50a65SJan Kara int deprecated_val; 2462f2d50a65SJan Kara } u; 24633197ebdbSTheodore Ts'o }; 24643197ebdbSTheodore Ts'o 246527dd4385SLukas Czerner static int parse_strtoull(const char *buf, 246627dd4385SLukas Czerner unsigned long long max, unsigned long long *value) 246727dd4385SLukas Czerner { 246827dd4385SLukas Czerner int ret; 246927dd4385SLukas Czerner 247027dd4385SLukas Czerner ret = kstrtoull(skip_spaces(buf), 0, value); 247127dd4385SLukas Czerner if (!ret && *value > max) 247227dd4385SLukas Czerner ret = -EINVAL; 247327dd4385SLukas Czerner return ret; 247427dd4385SLukas Czerner } 247527dd4385SLukas Czerner 24763197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24773197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24783197ebdbSTheodore Ts'o char *buf) 24793197ebdbSTheodore Ts'o { 24803197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24817b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24827b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24833197ebdbSTheodore Ts'o } 24843197ebdbSTheodore Ts'o 24853197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24863197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24873197ebdbSTheodore Ts'o { 24883197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24893197ebdbSTheodore Ts'o 2490f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2491f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24923197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24933197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24943197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24953197ebdbSTheodore Ts'o } 24963197ebdbSTheodore Ts'o 24973197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24983197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24993197ebdbSTheodore Ts'o { 25003197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 25013197ebdbSTheodore Ts'o 2502f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2503f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 25043197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2505a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 25063197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2507a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 25083197ebdbSTheodore Ts'o } 25093197ebdbSTheodore Ts'o 25103197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 25113197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25123197ebdbSTheodore Ts'o const char *buf, size_t count) 25133197ebdbSTheodore Ts'o { 25143197ebdbSTheodore Ts'o unsigned long t; 2515e1091b15SLukas Czerner int ret; 25163197ebdbSTheodore Ts'o 2517e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2518e1091b15SLukas Czerner if (ret) 2519e1091b15SLukas Czerner return ret; 25203197ebdbSTheodore Ts'o 2521e1091b15SLukas Czerner if (t && (!is_power_of_2(t) || t > 0x40000000)) 25223197ebdbSTheodore Ts'o return -EINVAL; 25233197ebdbSTheodore Ts'o 25243197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 25253197ebdbSTheodore Ts'o return count; 25263197ebdbSTheodore Ts'o } 25273197ebdbSTheodore Ts'o 25283197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25293197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25303197ebdbSTheodore Ts'o { 2531f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25323197ebdbSTheodore Ts'o 25333197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25343197ebdbSTheodore Ts'o } 25353197ebdbSTheodore Ts'o 25363197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25373197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25383197ebdbSTheodore Ts'o const char *buf, size_t count) 25393197ebdbSTheodore Ts'o { 2540f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25413197ebdbSTheodore Ts'o unsigned long t; 2542e1091b15SLukas Czerner int ret; 25433197ebdbSTheodore Ts'o 2544e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2545e1091b15SLukas Czerner if (ret) 2546e1091b15SLukas Czerner return ret; 25473197ebdbSTheodore Ts'o *ui = t; 25483197ebdbSTheodore Ts'o return count; 25493197ebdbSTheodore Ts'o } 25503197ebdbSTheodore Ts'o 255152c198c6SLukas Czerner static ssize_t es_ui_show(struct ext4_attr *a, 255252c198c6SLukas Czerner struct ext4_sb_info *sbi, char *buf) 255352c198c6SLukas Czerner { 255452c198c6SLukas Czerner 255552c198c6SLukas Czerner unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) + 255652c198c6SLukas Czerner a->u.offset); 255752c198c6SLukas Czerner 255852c198c6SLukas Czerner return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 255952c198c6SLukas Czerner } 256052c198c6SLukas Czerner 256127dd4385SLukas Czerner static ssize_t reserved_clusters_show(struct ext4_attr *a, 256227dd4385SLukas Czerner struct ext4_sb_info *sbi, char *buf) 256327dd4385SLukas Czerner { 256427dd4385SLukas Czerner return snprintf(buf, PAGE_SIZE, "%llu\n", 256527dd4385SLukas Czerner (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); 256627dd4385SLukas Czerner } 256727dd4385SLukas Czerner 256827dd4385SLukas Czerner static ssize_t reserved_clusters_store(struct ext4_attr *a, 256927dd4385SLukas Czerner struct ext4_sb_info *sbi, 257027dd4385SLukas Czerner const char *buf, size_t count) 257127dd4385SLukas Czerner { 257227dd4385SLukas Czerner unsigned long long val; 257327dd4385SLukas Czerner int ret; 257427dd4385SLukas Czerner 257527dd4385SLukas Czerner if (parse_strtoull(buf, -1ULL, &val)) 257627dd4385SLukas Czerner return -EINVAL; 257727dd4385SLukas Czerner ret = ext4_reserve_clusters(sbi, val); 257827dd4385SLukas Czerner 257927dd4385SLukas Czerner return ret ? ret : count; 258027dd4385SLukas Czerner } 258127dd4385SLukas Czerner 25822c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25832c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25842c0544b2STheodore Ts'o const char *buf, size_t count) 25852c0544b2STheodore Ts'o { 25862c0544b2STheodore Ts'o int len = count; 25872c0544b2STheodore Ts'o 25882c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25892c0544b2STheodore Ts'o return -EPERM; 25902c0544b2STheodore Ts'o 25912c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25922c0544b2STheodore Ts'o len--; 25932c0544b2STheodore Ts'o 25942c0544b2STheodore Ts'o if (len) 25952c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25962c0544b2STheodore Ts'o return count; 25972c0544b2STheodore Ts'o } 25982c0544b2STheodore Ts'o 2599f2d50a65SJan Kara static ssize_t sbi_deprecated_show(struct ext4_attr *a, 2600f2d50a65SJan Kara struct ext4_sb_info *sbi, char *buf) 2601f2d50a65SJan Kara { 2602f2d50a65SJan Kara return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); 2603f2d50a65SJan Kara } 2604f2d50a65SJan Kara 26053197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 26063197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 26073197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 26083197ebdbSTheodore Ts'o .show = _show, \ 26093197ebdbSTheodore Ts'o .store = _store, \ 2610f2d50a65SJan Kara .u = { \ 26113197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname),\ 2612f2d50a65SJan Kara }, \ 26133197ebdbSTheodore Ts'o } 261452c198c6SLukas Czerner 261552c198c6SLukas Czerner #define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \ 261652c198c6SLukas Czerner static struct ext4_attr ext4_attr_##_name = { \ 261752c198c6SLukas Czerner .attr = {.name = __stringify(_name), .mode = _mode }, \ 261852c198c6SLukas Czerner .show = _show, \ 261952c198c6SLukas Czerner .store = _store, \ 262052c198c6SLukas Czerner .u = { \ 262152c198c6SLukas Czerner .offset = offsetof(struct ext4_super_block, _elname), \ 262252c198c6SLukas Czerner }, \ 262352c198c6SLukas Czerner } 262452c198c6SLukas Czerner 26253197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 26263197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 26273197ebdbSTheodore Ts'o 2628857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 26293197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 26303197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 263152c198c6SLukas Czerner 263252c198c6SLukas Czerner #define EXT4_RO_ATTR_ES_UI(name, elname) \ 263352c198c6SLukas Czerner EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname) 26343197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 26353197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 263652c198c6SLukas Czerner 26373197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 2638f2d50a65SJan Kara #define EXT4_DEPRECATED_ATTR(_name, _val) \ 2639f2d50a65SJan Kara static struct ext4_attr ext4_attr_##_name = { \ 2640f2d50a65SJan Kara .attr = {.name = __stringify(_name), .mode = 0444 }, \ 2641f2d50a65SJan Kara .show = sbi_deprecated_show, \ 2642f2d50a65SJan Kara .u = { \ 2643f2d50a65SJan Kara .deprecated_val = _val, \ 2644f2d50a65SJan Kara }, \ 2645f2d50a65SJan Kara } 26463197ebdbSTheodore Ts'o 26473197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 26483197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 26493197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 265027dd4385SLukas Czerner EXT4_RW_ATTR(reserved_clusters); 26513197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 26523197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 265311013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 26543197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 26553197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 26563197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 26573197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26583197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26593197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 2660f2d50a65SJan Kara EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); 266167a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 26622c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 2663efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 2664efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 2665efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 2666efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 2667efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 2668efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 266952c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 267052c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); 267152c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); 26723197ebdbSTheodore Ts'o 26733197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26743197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26753197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26763197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 267727dd4385SLukas Czerner ATTR_LIST(reserved_clusters), 26783197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 267911013911SAndreas Dilger ATTR_LIST(inode_goal), 26803197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26813197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26823197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26833197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26843197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26853197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 268655138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 268767a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 26882c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 2689efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 2690efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_burst), 2691efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 2692efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 2693efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 2694efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 269552c198c6SLukas Czerner ATTR_LIST(errors_count), 269652c198c6SLukas Czerner ATTR_LIST(first_error_time), 269752c198c6SLukas Czerner ATTR_LIST(last_error_time), 26983197ebdbSTheodore Ts'o NULL, 26993197ebdbSTheodore Ts'o }; 27003197ebdbSTheodore Ts'o 2701857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2702857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 270327ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 27045e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2705857ac889SLukas Czerner 2706857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2707857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 270827ee40dfSLukas Czerner ATTR_LIST(batched_discard), 27095e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2710857ac889SLukas Czerner NULL, 2711857ac889SLukas Czerner }; 2712857ac889SLukas Czerner 27133197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 27143197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 27153197ebdbSTheodore Ts'o { 27163197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27173197ebdbSTheodore Ts'o s_kobj); 27183197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27193197ebdbSTheodore Ts'o 27203197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 27213197ebdbSTheodore Ts'o } 27223197ebdbSTheodore Ts'o 27233197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 27243197ebdbSTheodore Ts'o struct attribute *attr, 27253197ebdbSTheodore Ts'o const char *buf, size_t len) 27263197ebdbSTheodore Ts'o { 27273197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27283197ebdbSTheodore Ts'o s_kobj); 27293197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27303197ebdbSTheodore Ts'o 27313197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 27323197ebdbSTheodore Ts'o } 27333197ebdbSTheodore Ts'o 27343197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 27353197ebdbSTheodore Ts'o { 27363197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27373197ebdbSTheodore Ts'o s_kobj); 27383197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 27393197ebdbSTheodore Ts'o } 27403197ebdbSTheodore Ts'o 274152cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 27423197ebdbSTheodore Ts'o .show = ext4_attr_show, 27433197ebdbSTheodore Ts'o .store = ext4_attr_store, 27443197ebdbSTheodore Ts'o }; 27453197ebdbSTheodore Ts'o 27463197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 27473197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 27483197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 27493197ebdbSTheodore Ts'o .release = ext4_sb_release, 27503197ebdbSTheodore Ts'o }; 27513197ebdbSTheodore Ts'o 2752857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2753857ac889SLukas Czerner { 2754857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2755857ac889SLukas Czerner } 2756857ac889SLukas Czerner 2757c7f72543SLukas Czerner static ssize_t ext4_feat_show(struct kobject *kobj, 2758c7f72543SLukas Czerner struct attribute *attr, char *buf) 2759c7f72543SLukas Czerner { 2760c7f72543SLukas Czerner return snprintf(buf, PAGE_SIZE, "supported\n"); 2761c7f72543SLukas Czerner } 2762c7f72543SLukas Czerner 2763c7f72543SLukas Czerner /* 2764c7f72543SLukas Czerner * We can not use ext4_attr_show/store because it relies on the kobject 2765c7f72543SLukas Czerner * being embedded in the ext4_sb_info structure which is definitely not 2766c7f72543SLukas Czerner * true in this case. 2767c7f72543SLukas Czerner */ 2768c7f72543SLukas Czerner static const struct sysfs_ops ext4_feat_ops = { 2769c7f72543SLukas Czerner .show = ext4_feat_show, 2770c7f72543SLukas Czerner .store = NULL, 2771c7f72543SLukas Czerner }; 2772c7f72543SLukas Czerner 2773857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2774857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2775c7f72543SLukas Czerner .sysfs_ops = &ext4_feat_ops, 2776857ac889SLukas Czerner .release = ext4_feat_release, 2777857ac889SLukas Czerner }; 2778857ac889SLukas Czerner 2779a13fb1a4SEric Sandeen /* 2780a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2781a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2782a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2783a13fb1a4SEric Sandeen * 0 if it cannot be. 2784a13fb1a4SEric Sandeen */ 2785a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2786a13fb1a4SEric Sandeen { 2787a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2788a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2789a13fb1a4SEric Sandeen "Couldn't mount because of " 2790a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2791a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2792a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2793a13fb1a4SEric Sandeen return 0; 2794a13fb1a4SEric Sandeen } 2795a13fb1a4SEric Sandeen 2796a13fb1a4SEric Sandeen if (readonly) 2797a13fb1a4SEric Sandeen return 1; 2798a13fb1a4SEric Sandeen 2799a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2800a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2801a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2802a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2803a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2804a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2805a13fb1a4SEric Sandeen return 0; 2806a13fb1a4SEric Sandeen } 2807a13fb1a4SEric Sandeen /* 2808a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2809a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2810a13fb1a4SEric Sandeen */ 2811a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2812a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2813a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2814a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2815a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2816a13fb1a4SEric Sandeen return 0; 2817a13fb1a4SEric Sandeen } 2818a13fb1a4SEric Sandeen } 2819bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2820bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2821bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2822bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2823bab08ab9STheodore Ts'o "extents feature\n"); 2824bab08ab9STheodore Ts'o return 0; 2825bab08ab9STheodore Ts'o } 28267c319d32SAditya Kali 28277c319d32SAditya Kali #ifndef CONFIG_QUOTA 28287c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 28297c319d32SAditya Kali !readonly) { 28307c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28317c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28327c319d32SAditya Kali "without CONFIG_QUOTA"); 28337c319d32SAditya Kali return 0; 28347c319d32SAditya Kali } 28357c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2836a13fb1a4SEric Sandeen return 1; 2837a13fb1a4SEric Sandeen } 2838a13fb1a4SEric Sandeen 283966e61a9eSTheodore Ts'o /* 284066e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 284166e61a9eSTheodore Ts'o * on the file system 284266e61a9eSTheodore Ts'o */ 284366e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 284466e61a9eSTheodore Ts'o { 284566e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 284666e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 284766e61a9eSTheodore Ts'o struct ext4_super_block *es; 284866e61a9eSTheodore Ts'o 284966e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 285066e61a9eSTheodore Ts'o es = sbi->s_es; 285166e61a9eSTheodore Ts'o 285266e61a9eSTheodore Ts'o if (es->s_error_count) 2853ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2854ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 285566e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 285666e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2857ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 285866e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 285966e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 286066e61a9eSTheodore Ts'o es->s_first_error_func, 286166e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 286266e61a9eSTheodore Ts'o if (es->s_first_error_ino) 286366e61a9eSTheodore Ts'o printk(": inode %u", 286466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 286566e61a9eSTheodore Ts'o if (es->s_first_error_block) 286666e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 286766e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 286866e61a9eSTheodore Ts'o printk("\n"); 286966e61a9eSTheodore Ts'o } 287066e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2871ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 287266e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 287366e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 287466e61a9eSTheodore Ts'o es->s_last_error_func, 287566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 287666e61a9eSTheodore Ts'o if (es->s_last_error_ino) 287766e61a9eSTheodore Ts'o printk(": inode %u", 287866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 287966e61a9eSTheodore Ts'o if (es->s_last_error_block) 288066e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 288166e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 288266e61a9eSTheodore Ts'o printk("\n"); 288366e61a9eSTheodore Ts'o } 288466e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 288566e61a9eSTheodore Ts'o } 288666e61a9eSTheodore Ts'o 2887bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2888bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2889bfff6873SLukas Czerner { 2890bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2891bfff6873SLukas Czerner ext4_group_t group, ngroups; 2892bfff6873SLukas Czerner struct super_block *sb; 2893bfff6873SLukas Czerner unsigned long timeout = 0; 2894bfff6873SLukas Czerner int ret = 0; 2895bfff6873SLukas Czerner 2896bfff6873SLukas Czerner sb = elr->lr_super; 2897bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2898bfff6873SLukas Czerner 28998e8ad8a5SJan Kara sb_start_write(sb); 2900bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2901bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2902bfff6873SLukas Czerner if (!gdp) { 2903bfff6873SLukas Czerner ret = 1; 2904bfff6873SLukas Czerner break; 2905bfff6873SLukas Czerner } 2906bfff6873SLukas Czerner 2907bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2908bfff6873SLukas Czerner break; 2909bfff6873SLukas Czerner } 2910bfff6873SLukas Czerner 29117f511862STheodore Ts'o if (group >= ngroups) 2912bfff6873SLukas Czerner ret = 1; 2913bfff6873SLukas Czerner 2914bfff6873SLukas Czerner if (!ret) { 2915bfff6873SLukas Czerner timeout = jiffies; 2916bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2917bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2918bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 291951ce6511SLukas Czerner timeout = (jiffies - timeout) * 292051ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2921bfff6873SLukas Czerner elr->lr_timeout = timeout; 2922bfff6873SLukas Czerner } 2923bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2924bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2925bfff6873SLukas Czerner } 29268e8ad8a5SJan Kara sb_end_write(sb); 2927bfff6873SLukas Czerner 2928bfff6873SLukas Czerner return ret; 2929bfff6873SLukas Czerner } 2930bfff6873SLukas Czerner 2931bfff6873SLukas Czerner /* 2932bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29334ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2934bfff6873SLukas Czerner */ 2935bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2936bfff6873SLukas Czerner { 2937bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2938bfff6873SLukas Czerner 2939bfff6873SLukas Czerner if (!elr) 2940bfff6873SLukas Czerner return; 2941bfff6873SLukas Czerner 2942bfff6873SLukas Czerner sbi = elr->lr_sbi; 2943bfff6873SLukas Czerner 2944bfff6873SLukas Czerner list_del(&elr->lr_request); 2945bfff6873SLukas Czerner sbi->s_li_request = NULL; 2946bfff6873SLukas Czerner kfree(elr); 2947bfff6873SLukas Czerner } 2948bfff6873SLukas Czerner 2949bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2950bfff6873SLukas Czerner { 29511bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29521bb933fbSLukas Czerner if (!ext4_li_info) { 29531bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2954bfff6873SLukas Czerner return; 29551bb933fbSLukas Czerner } 2956bfff6873SLukas Czerner 2957bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29581bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2959bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29601bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2961bfff6873SLukas Czerner } 2962bfff6873SLukas Czerner 29638f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29648f1f7453SEric Sandeen 2965bfff6873SLukas Czerner /* 2966bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2967bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2968bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2969bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2970bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2971bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2972bfff6873SLukas Czerner * next waking time and put itself into sleep. 2973bfff6873SLukas Czerner */ 2974bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2975bfff6873SLukas Czerner { 2976bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2977bfff6873SLukas Czerner struct list_head *pos, *n; 2978bfff6873SLukas Czerner struct ext4_li_request *elr; 29794ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2980bfff6873SLukas Czerner 2981bfff6873SLukas Czerner BUG_ON(NULL == eli); 2982bfff6873SLukas Czerner 2983bfff6873SLukas Czerner cont_thread: 2984bfff6873SLukas Czerner while (true) { 2985bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2986bfff6873SLukas Czerner 2987bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2988bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2989bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2990bfff6873SLukas Czerner goto exit_thread; 2991bfff6873SLukas Czerner } 2992bfff6873SLukas Czerner 2993bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2994bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2995bfff6873SLukas Czerner lr_request); 2996bfff6873SLukas Czerner 2997b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2998b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2999b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3000bfff6873SLukas Czerner ext4_remove_li_request(elr); 3001bfff6873SLukas Czerner continue; 3002bfff6873SLukas Czerner } 3003b2c78cd0STheodore Ts'o } 3004bfff6873SLukas Czerner 3005bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3006bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3007bfff6873SLukas Czerner } 3008bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3009bfff6873SLukas Czerner 3010a0acae0eSTejun Heo try_to_freeze(); 3011bfff6873SLukas Czerner 30124ed5c033SLukas Czerner cur = jiffies; 30134ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3014f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3015bfff6873SLukas Czerner cond_resched(); 3016bfff6873SLukas Czerner continue; 3017bfff6873SLukas Czerner } 3018bfff6873SLukas Czerner 30194ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 30204ed5c033SLukas Czerner 30218f1f7453SEric Sandeen if (kthread_should_stop()) { 30228f1f7453SEric Sandeen ext4_clear_request_list(); 30238f1f7453SEric Sandeen goto exit_thread; 30248f1f7453SEric Sandeen } 3025bfff6873SLukas Czerner } 3026bfff6873SLukas Czerner 3027bfff6873SLukas Czerner exit_thread: 3028bfff6873SLukas Czerner /* 3029bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3030bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3031bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3032bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3033bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3034bfff6873SLukas Czerner * new one. 3035bfff6873SLukas Czerner */ 3036bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3037bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3038bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3039bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3040bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3041bfff6873SLukas Czerner goto cont_thread; 3042bfff6873SLukas Czerner } 3043bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3044bfff6873SLukas Czerner kfree(ext4_li_info); 3045bfff6873SLukas Czerner ext4_li_info = NULL; 3046bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3047bfff6873SLukas Czerner 3048bfff6873SLukas Czerner return 0; 3049bfff6873SLukas Czerner } 3050bfff6873SLukas Czerner 3051bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3052bfff6873SLukas Czerner { 3053bfff6873SLukas Czerner struct list_head *pos, *n; 3054bfff6873SLukas Czerner struct ext4_li_request *elr; 3055bfff6873SLukas Czerner 3056bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3057bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3058bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3059bfff6873SLukas Czerner lr_request); 3060bfff6873SLukas Czerner ext4_remove_li_request(elr); 3061bfff6873SLukas Czerner } 3062bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3063bfff6873SLukas Czerner } 3064bfff6873SLukas Czerner 3065bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3066bfff6873SLukas Czerner { 30678f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30688f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30698f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30708f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3071bfff6873SLukas Czerner ext4_clear_request_list(); 3072bfff6873SLukas Czerner kfree(ext4_li_info); 3073bfff6873SLukas Czerner ext4_li_info = NULL; 307492b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3075bfff6873SLukas Czerner "initialization thread\n", 3076bfff6873SLukas Czerner err); 3077bfff6873SLukas Czerner return err; 3078bfff6873SLukas Czerner } 3079bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3080bfff6873SLukas Czerner return 0; 3081bfff6873SLukas Czerner } 3082bfff6873SLukas Czerner 3083bfff6873SLukas Czerner /* 3084bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3085bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3086bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3087bfff6873SLukas Czerner * groups and return total number of groups. 3088bfff6873SLukas Czerner */ 3089bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3090bfff6873SLukas Czerner { 3091bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3092bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3093bfff6873SLukas Czerner 3094bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3095bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3096bfff6873SLukas Czerner if (!gdp) 3097bfff6873SLukas Czerner continue; 3098bfff6873SLukas Czerner 3099bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3100bfff6873SLukas Czerner break; 3101bfff6873SLukas Czerner } 3102bfff6873SLukas Czerner 3103bfff6873SLukas Czerner return group; 3104bfff6873SLukas Czerner } 3105bfff6873SLukas Czerner 3106bfff6873SLukas Czerner static int ext4_li_info_new(void) 3107bfff6873SLukas Czerner { 3108bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3109bfff6873SLukas Czerner 3110bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3111bfff6873SLukas Czerner if (!eli) 3112bfff6873SLukas Czerner return -ENOMEM; 3113bfff6873SLukas Czerner 3114bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3115bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3116bfff6873SLukas Czerner 3117bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3118bfff6873SLukas Czerner 3119bfff6873SLukas Czerner ext4_li_info = eli; 3120bfff6873SLukas Czerner 3121bfff6873SLukas Czerner return 0; 3122bfff6873SLukas Czerner } 3123bfff6873SLukas Czerner 3124bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3125bfff6873SLukas Czerner ext4_group_t start) 3126bfff6873SLukas Czerner { 3127bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3128bfff6873SLukas Czerner struct ext4_li_request *elr; 3129bfff6873SLukas Czerner 3130bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3131bfff6873SLukas Czerner if (!elr) 3132bfff6873SLukas Czerner return NULL; 3133bfff6873SLukas Czerner 3134bfff6873SLukas Czerner elr->lr_super = sb; 3135bfff6873SLukas Czerner elr->lr_sbi = sbi; 3136bfff6873SLukas Czerner elr->lr_next_group = start; 3137bfff6873SLukas Czerner 3138bfff6873SLukas Czerner /* 3139bfff6873SLukas Czerner * Randomize first schedule time of the request to 3140bfff6873SLukas Czerner * spread the inode table initialization requests 3141bfff6873SLukas Czerner * better. 3142bfff6873SLukas Czerner */ 3143dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3144dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3145bfff6873SLukas Czerner return elr; 3146bfff6873SLukas Czerner } 3147bfff6873SLukas Czerner 31487f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3149bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3150bfff6873SLukas Czerner { 3151bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31527f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3153bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 31546c5a6cb9SAndrew Morton int ret = 0; 3155bfff6873SLukas Czerner 31567f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 315751ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 315851ce6511SLukas Czerner /* 315951ce6511SLukas Czerner * Reset timeout so it can be computed again, because 316051ce6511SLukas Czerner * s_li_wait_mult might have changed. 316151ce6511SLukas Czerner */ 316251ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31637f511862STheodore Ts'o goto out; 316451ce6511SLukas Czerner } 3165bfff6873SLukas Czerner 3166bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3167bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 316855ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31697f511862STheodore Ts'o goto out; 3170bfff6873SLukas Czerner 3171bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31727f511862STheodore Ts'o if (!elr) { 31737f511862STheodore Ts'o ret = -ENOMEM; 31747f511862STheodore Ts'o goto out; 31757f511862STheodore Ts'o } 3176bfff6873SLukas Czerner 3177bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3178bfff6873SLukas Czerner ret = ext4_li_info_new(); 3179bfff6873SLukas Czerner if (ret) 3180bfff6873SLukas Czerner goto out; 3181bfff6873SLukas Czerner } 3182bfff6873SLukas Czerner 3183bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3184bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3185bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3186bfff6873SLukas Czerner 3187bfff6873SLukas Czerner sbi->s_li_request = elr; 318846e4690bSTao Ma /* 318946e4690bSTao Ma * set elr to NULL here since it has been inserted to 319046e4690bSTao Ma * the request_list and the removal and free of it is 319146e4690bSTao Ma * handled by ext4_clear_request_list from now on. 319246e4690bSTao Ma */ 319346e4690bSTao Ma elr = NULL; 3194bfff6873SLukas Czerner 3195bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3196bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3197bfff6873SLukas Czerner if (ret) 3198bfff6873SLukas Czerner goto out; 3199bfff6873SLukas Czerner } 3200bfff6873SLukas Czerner out: 3201bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3202beed5ecbSNicolas Kaiser if (ret) 3203bfff6873SLukas Czerner kfree(elr); 3204bfff6873SLukas Czerner return ret; 3205bfff6873SLukas Czerner } 3206bfff6873SLukas Czerner 3207bfff6873SLukas Czerner /* 3208bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3209bfff6873SLukas Czerner * module unload. 3210bfff6873SLukas Czerner */ 3211bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3212bfff6873SLukas Czerner { 3213bfff6873SLukas Czerner /* 3214bfff6873SLukas Czerner * If thread exited earlier 3215bfff6873SLukas Czerner * there's nothing to be done. 3216bfff6873SLukas Czerner */ 32178f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3218bfff6873SLukas Czerner return; 3219bfff6873SLukas Czerner 32208f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3221bfff6873SLukas Czerner } 3222bfff6873SLukas Czerner 322325ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 322425ed6e8aSDarrick J. Wong { 322525ed6e8aSDarrick J. Wong int ret = 1; 322625ed6e8aSDarrick J. Wong int compat, incompat; 322725ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 322825ed6e8aSDarrick J. Wong 322925ed6e8aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 323025ed6e8aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 3231db9ee220SDarrick J. Wong /* journal checksum v3 */ 323225ed6e8aSDarrick J. Wong compat = 0; 3233db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 323425ed6e8aSDarrick J. Wong } else { 323525ed6e8aSDarrick J. Wong /* journal checksum v1 */ 323625ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 323725ed6e8aSDarrick J. Wong incompat = 0; 323825ed6e8aSDarrick J. Wong } 323925ed6e8aSDarrick J. Wong 3240feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3241feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3242feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3243feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 324425ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 324525ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 324625ed6e8aSDarrick J. Wong compat, 0, 324725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 324825ed6e8aSDarrick J. Wong incompat); 324925ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 325025ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 325125ed6e8aSDarrick J. Wong compat, 0, 325225ed6e8aSDarrick J. Wong incompat); 325325ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 325425ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 325525ed6e8aSDarrick J. Wong } else { 3256feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3257feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 325825ed6e8aSDarrick J. Wong } 325925ed6e8aSDarrick J. Wong 326025ed6e8aSDarrick J. Wong return ret; 326125ed6e8aSDarrick J. Wong } 326225ed6e8aSDarrick J. Wong 3263952fc18eSTheodore Ts'o /* 3264952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3265952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3266952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3267952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3268952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3269952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3270952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3271952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3272952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3273952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3274952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3275952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3276952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3277952fc18eSTheodore Ts'o */ 3278952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3279952fc18eSTheodore Ts'o char *buf) 3280952fc18eSTheodore Ts'o { 3281952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3282952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3283952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3284952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3285952fc18eSTheodore Ts'o int s, j, count = 0; 3286952fc18eSTheodore Ts'o 32870548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 32880548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32890548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32900548bbb8STheodore Ts'o 3291952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3292952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3293952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3294952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3295952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3296952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3297952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3298952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3299952fc18eSTheodore Ts'o count++; 3300952fc18eSTheodore Ts'o } 3301952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3302952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3303952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3304952fc18eSTheodore Ts'o count++; 3305952fc18eSTheodore Ts'o } 3306952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3307952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3308952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3309952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3310952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3311952fc18eSTheodore Ts'o count++; 3312952fc18eSTheodore Ts'o } 3313952fc18eSTheodore Ts'o if (i != grp) 3314952fc18eSTheodore Ts'o continue; 3315952fc18eSTheodore Ts'o s = 0; 3316952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3317952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3318952fc18eSTheodore Ts'o count++; 3319952fc18eSTheodore Ts'o } 3320952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3321952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3322952fc18eSTheodore Ts'o count++; 3323952fc18eSTheodore Ts'o } 3324952fc18eSTheodore Ts'o } 3325952fc18eSTheodore Ts'o if (!count) 3326952fc18eSTheodore Ts'o return 0; 3327952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3328952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3329952fc18eSTheodore Ts'o } 3330952fc18eSTheodore Ts'o 3331952fc18eSTheodore Ts'o /* 3332952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3333952fc18eSTheodore Ts'o */ 3334952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3335952fc18eSTheodore Ts'o { 3336952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3337952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3338952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3339952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3340952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3341952fc18eSTheodore Ts'o 3342952fc18eSTheodore Ts'o if (!buf) 3343952fc18eSTheodore Ts'o return -ENOMEM; 3344952fc18eSTheodore Ts'o 3345952fc18eSTheodore Ts'o /* 3346952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3347952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3348952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3349952fc18eSTheodore Ts'o */ 3350952fc18eSTheodore Ts'o 3351952fc18eSTheodore Ts'o /* 3352952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3353952fc18eSTheodore Ts'o */ 3354952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3355952fc18eSTheodore Ts'o 3356952fc18eSTheodore Ts'o /* 3357952fc18eSTheodore Ts'o * Add the overhead found in each block group 3358952fc18eSTheodore Ts'o */ 3359952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3360952fc18eSTheodore Ts'o int blks; 3361952fc18eSTheodore Ts'o 3362952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3363952fc18eSTheodore Ts'o overhead += blks; 3364952fc18eSTheodore Ts'o if (blks) 3365952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3366952fc18eSTheodore Ts'o cond_resched(); 3367952fc18eSTheodore Ts'o } 33680875a2b4SEric Sandeen /* Add the journal blocks as well */ 33690875a2b4SEric Sandeen if (sbi->s_journal) 3370810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33710875a2b4SEric Sandeen 3372952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3373952fc18eSTheodore Ts'o smp_wmb(); 3374952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3375952fc18eSTheodore Ts'o return 0; 3376952fc18eSTheodore Ts'o } 3377952fc18eSTheodore Ts'o 337827dd4385SLukas Czerner 337930fac0f7SJan Kara static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) 338027dd4385SLukas Czerner { 338127dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 338227dd4385SLukas Czerner 338327dd4385SLukas Czerner /* 338430fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 338530fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 338630fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 338730fac0f7SJan Kara * to keep ext2/3 backward compatibility. 338830fac0f7SJan Kara */ 338930fac0f7SJan Kara if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 339030fac0f7SJan Kara return 0; 339130fac0f7SJan Kara /* 339227dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 339327dd4385SLukas Czerner * This should cover the situations where we can not afford to run 339427dd4385SLukas Czerner * out of space like for example punch hole, or converting 3395556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 339627dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 339727dd4385SLukas Czerner * very rare. 339827dd4385SLukas Czerner */ 339930fac0f7SJan Kara resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> 340030fac0f7SJan Kara EXT4_SB(sb)->s_cluster_bits; 340127dd4385SLukas Czerner 340227dd4385SLukas Czerner do_div(resv_clusters, 50); 340327dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 340427dd4385SLukas Czerner 340527dd4385SLukas Czerner return resv_clusters; 340627dd4385SLukas Czerner } 340727dd4385SLukas Czerner 340827dd4385SLukas Czerner 340927dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) 341027dd4385SLukas Czerner { 341127dd4385SLukas Czerner ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> 341227dd4385SLukas Czerner sbi->s_cluster_bits; 341327dd4385SLukas Czerner 341427dd4385SLukas Czerner if (count >= clusters) 341527dd4385SLukas Czerner return -EINVAL; 341627dd4385SLukas Czerner 341727dd4385SLukas Czerner atomic64_set(&sbi->s_resv_clusters, count); 341827dd4385SLukas Czerner return 0; 341927dd4385SLukas Czerner } 342027dd4385SLukas Czerner 3421617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3422ac27a0ecSDave Kleikamp { 3423d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3424ac27a0ecSDave Kleikamp struct buffer_head *bh; 3425617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3426617ba13bSMingming Cao struct ext4_sb_info *sbi; 3427617ba13bSMingming Cao ext4_fsblk_t block; 3428617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 342970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3430ac27a0ecSDave Kleikamp unsigned long offset = 0; 3431ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3432ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3433ac27a0ecSDave Kleikamp struct inode *root; 34349f6200bbSTheodore Ts'o char *cp; 34350390131bSFrank Mayhar const char *descr; 3436dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3437281b5995STheodore Ts'o int blocksize, clustersize; 34384ec11028STheodore Ts'o unsigned int db_count; 34394ec11028STheodore Ts'o unsigned int i; 3440281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3441bd81d8eeSLaurent Vivier __u64 blocks_count; 344207aa2ea1SLukas Czerner int err = 0; 3443b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3444bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3445ac27a0ecSDave Kleikamp 3446ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3447ac27a0ecSDave Kleikamp if (!sbi) 3448dcc7dae3SCyrill Gorcunov goto out_free_orig; 3449705895b6SPekka Enberg 3450705895b6SPekka Enberg sbi->s_blockgroup_lock = 3451705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3452705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3453705895b6SPekka Enberg kfree(sbi); 3454dcc7dae3SCyrill Gorcunov goto out_free_orig; 3455705895b6SPekka Enberg } 3456ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34572c0544b2STheodore Ts'o sbi->s_sb = sb; 3458240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3459d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3460f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3461f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3462f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3463ac27a0ecSDave Kleikamp 34649f6200bbSTheodore Ts'o /* Cleanup superblock name */ 34659f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 34669f6200bbSTheodore Ts'o *cp = '!'; 34679f6200bbSTheodore Ts'o 346807aa2ea1SLukas Czerner /* -EINVAL is default */ 3469dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3470617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3471ac27a0ecSDave Kleikamp if (!blocksize) { 3472b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3473ac27a0ecSDave Kleikamp goto out_fail; 3474ac27a0ecSDave Kleikamp } 3475ac27a0ecSDave Kleikamp 3476ac27a0ecSDave Kleikamp /* 3477617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3478ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3479ac27a0ecSDave Kleikamp */ 3480617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 348170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 348270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3483ac27a0ecSDave Kleikamp } else { 348470bbb3e0SAndrew Morton logical_sb_block = sb_block; 3485ac27a0ecSDave Kleikamp } 3486ac27a0ecSDave Kleikamp 3487a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3488b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3489ac27a0ecSDave Kleikamp goto out_fail; 3490ac27a0ecSDave Kleikamp } 3491ac27a0ecSDave Kleikamp /* 3492ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3493617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3494ac27a0ecSDave Kleikamp */ 34952716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3496ac27a0ecSDave Kleikamp sbi->s_es = es; 3497ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3498617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3499617ba13bSMingming Cao goto cantfind_ext4; 3500afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3501ac27a0ecSDave Kleikamp 3502feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3503feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3504feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3505feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3506feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3507feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3508feb0ab32SDarrick J. Wong 3509d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3510d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3511d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3512d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3513d25425f8SDarrick J. Wong silent = 1; 3514d25425f8SDarrick J. Wong goto cantfind_ext4; 3515d25425f8SDarrick J. Wong } 3516d25425f8SDarrick J. Wong 35170441984aSDarrick J. Wong /* Load the checksum driver */ 35180441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 35190441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 35200441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 35210441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 35220441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 35230441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 35240441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 35250441984aSDarrick J. Wong goto failed_mount; 35260441984aSDarrick J. Wong } 35270441984aSDarrick J. Wong } 35280441984aSDarrick J. Wong 3529a9c47317SDarrick J. Wong /* Check superblock checksum */ 3530a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3531a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3532a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3533a9c47317SDarrick J. Wong silent = 1; 3534a9c47317SDarrick J. Wong goto cantfind_ext4; 3535a9c47317SDarrick J. Wong } 3536a9c47317SDarrick J. Wong 3537a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3538a9c47317SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3539a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 3540a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3541a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3542a9c47317SDarrick J. Wong 3543ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3544ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3545fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3546617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3547fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 354887f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3549fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3550617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3551fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3552ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3553fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 355403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3555fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35562e7842b8SHugh Dickins #endif 3557617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3558fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3559617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3560fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3561617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3562fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3563ac27a0ecSDave Kleikamp 3564617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3565fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3566bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3567fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3568bb4f397aSAneesh Kumar K.V else 3569fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 357045f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3571fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35728b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3573fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3574ac27a0ecSDave Kleikamp 357508cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 357608cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 357730773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 357830773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 357930773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3580ac27a0ecSDave Kleikamp 35818b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3582fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3583ac27a0ecSDave Kleikamp 35841e2462f9SMingming Cao /* 3585dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3586dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3587dd919b98SAneesh Kumar K.V */ 3588bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35898b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3590fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3591dd919b98SAneesh Kumar K.V 359251ce6511SLukas Czerner /* 359351ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 359451ce6511SLukas Czerner * no mount option specified. 359551ce6511SLukas Czerner */ 359651ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 359751ce6511SLukas Czerner 35988b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3599661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 36008b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 36018b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 36028b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 36038b67f04aSTheodore Ts'o } 36045a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3605b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3606661aa520SEric Sandeen &journal_ioprio, 0)) 3607ac27a0ecSDave Kleikamp goto failed_mount; 3608ac27a0ecSDave Kleikamp 360956889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 361056889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 361156889787STheodore Ts'o "with data=journal disables delayed " 361256889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 361356889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 361456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 361556889787STheodore Ts'o "both data=journal and delalloc"); 361656889787STheodore Ts'o goto failed_mount; 361756889787STheodore Ts'o } 361856889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 361956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 36206ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 362156889787STheodore Ts'o goto failed_mount; 362256889787STheodore Ts'o } 362356889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 362456889787STheodore Ts'o clear_opt(sb, DELALLOC); 362556889787STheodore Ts'o } 362656889787STheodore Ts'o 3627ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3628482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3629ac27a0ecSDave Kleikamp 3630617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3631617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3632617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3633617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3634b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3635b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3636b31e1552SEric Sandeen "running e2fsck is recommended"); 3637469108ffSTheodore Tso 3638ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3639ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3640ed3654ebSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, 3641ed3654ebSTheodore Ts'o EXT4_FEATURE_INCOMPAT_64BIT)) { 3642ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3643ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3644ed3654ebSTheodore Ts'o goto failed_mount; 3645ed3654ebSTheodore Ts'o } 3646ed3654ebSTheodore Ts'o } 3647ed3654ebSTheodore Ts'o 36482035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36492035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36502035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36512035e776STheodore Ts'o "using the ext4 subsystem"); 36522035e776STheodore Ts'o else { 36532035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36542035e776STheodore Ts'o "to feature incompatibilities"); 36552035e776STheodore Ts'o goto failed_mount; 36562035e776STheodore Ts'o } 36572035e776STheodore Ts'o } 36582035e776STheodore Ts'o 36592035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36602035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36612035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36622035e776STheodore Ts'o "using the ext4 subsystem"); 36632035e776STheodore Ts'o else { 36642035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36652035e776STheodore Ts'o "to feature incompatibilities"); 36662035e776STheodore Ts'o goto failed_mount; 36672035e776STheodore Ts'o } 36682035e776STheodore Ts'o } 36692035e776STheodore Ts'o 3670469108ffSTheodore Tso /* 3671ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3672ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3673ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3674ac27a0ecSDave Kleikamp */ 3675a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3676ac27a0ecSDave Kleikamp goto failed_mount; 3677a13fb1a4SEric Sandeen 3678261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3679617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3680617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3681b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3682b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3683ac27a0ecSDave Kleikamp goto failed_mount; 3684ac27a0ecSDave Kleikamp } 3685ac27a0ecSDave Kleikamp 3686ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3687ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3688ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3689b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3690ce40733cSAneesh Kumar K.V blocksize); 3691ac27a0ecSDave Kleikamp goto failed_mount; 3692ac27a0ecSDave Kleikamp } 3693ac27a0ecSDave Kleikamp 3694ac27a0ecSDave Kleikamp brelse(bh); 369570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 369670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3697a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3698ac27a0ecSDave Kleikamp if (!bh) { 3699b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3700b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3701ac27a0ecSDave Kleikamp goto failed_mount; 3702ac27a0ecSDave Kleikamp } 37032716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3704ac27a0ecSDave Kleikamp sbi->s_es = es; 3705617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3706b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3707b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3708ac27a0ecSDave Kleikamp goto failed_mount; 3709ac27a0ecSDave Kleikamp } 3710ac27a0ecSDave Kleikamp } 3711ac27a0ecSDave Kleikamp 3712a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3713a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3714f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3715f287a1a5STheodore Ts'o has_huge_files); 3716f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3717ac27a0ecSDave Kleikamp 3718617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3719617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3720617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3721ac27a0ecSDave Kleikamp } else { 3722ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3723ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3724617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 37251330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3726ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3727b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3728b31e1552SEric Sandeen "unsupported inode size: %d", 3729ac27a0ecSDave Kleikamp sbi->s_inode_size); 3730ac27a0ecSDave Kleikamp goto failed_mount; 3731ac27a0ecSDave Kleikamp } 3732ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3733ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3734ac27a0ecSDave Kleikamp } 37350b8e58a1SAndreas Dilger 37360d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 37370d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 37388fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 37390d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3740d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3741b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3742b31e1552SEric Sandeen "unsupported descriptor size %lu", 37430d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37440d1ee42fSAlexandre Ratchov goto failed_mount; 37450d1ee42fSAlexandre Ratchov } 37460d1ee42fSAlexandre Ratchov } else 37470d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37480b8e58a1SAndreas Dilger 3749ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3750ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3751b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3752617ba13bSMingming Cao goto cantfind_ext4; 37530b8e58a1SAndreas Dilger 3754617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3755ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3756617ba13bSMingming Cao goto cantfind_ext4; 3757ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3758ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37590d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3760ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3761ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3762e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3763e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37640b8e58a1SAndreas Dilger 3765ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3766ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3767ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 376823301410STheodore Ts'o if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { 3769f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3770f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3771f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3772f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3773f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 377423301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 377523301410STheodore Ts'o es->s_flags |= 377623301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3777f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3778f99b2589STheodore Ts'o #else 377923301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 378023301410STheodore Ts'o es->s_flags |= 378123301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3782f99b2589STheodore Ts'o #endif 3783f99b2589STheodore Ts'o } 378423301410STheodore Ts'o } 3785ac27a0ecSDave Kleikamp 3786281b5995STheodore Ts'o /* Handle clustersize */ 3787281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3788281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3789281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3790281b5995STheodore Ts'o if (has_bigalloc) { 3791281b5995STheodore Ts'o if (clustersize < blocksize) { 3792281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3793281b5995STheodore Ts'o "cluster size (%d) smaller than " 3794281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3795281b5995STheodore Ts'o goto failed_mount; 3796281b5995STheodore Ts'o } 3797281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3798281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3799281b5995STheodore Ts'o sbi->s_clusters_per_group = 3800281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3801281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3802281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3803281b5995STheodore Ts'o "#clusters per group too big: %lu", 3804281b5995STheodore Ts'o sbi->s_clusters_per_group); 3805281b5995STheodore Ts'o goto failed_mount; 3806281b5995STheodore Ts'o } 3807281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3808281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3809281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3810281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3811281b5995STheodore Ts'o sbi->s_blocks_per_group, 3812281b5995STheodore Ts'o sbi->s_clusters_per_group); 3813281b5995STheodore Ts'o goto failed_mount; 3814281b5995STheodore Ts'o } 3815281b5995STheodore Ts'o } else { 3816281b5995STheodore Ts'o if (clustersize != blocksize) { 3817281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3818281b5995STheodore Ts'o "block size (%d)", clustersize, 3819281b5995STheodore Ts'o blocksize); 3820281b5995STheodore Ts'o clustersize = blocksize; 3821281b5995STheodore Ts'o } 3822ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3823b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3824b31e1552SEric Sandeen "#blocks per group too big: %lu", 3825ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3826ac27a0ecSDave Kleikamp goto failed_mount; 3827ac27a0ecSDave Kleikamp } 3828281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3829281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3830281b5995STheodore Ts'o } 3831281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3832281b5995STheodore Ts'o 3833ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3834b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3835b31e1552SEric Sandeen "#inodes per group too big: %lu", 3836ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3837ac27a0ecSDave Kleikamp goto failed_mount; 3838ac27a0ecSDave Kleikamp } 3839ac27a0ecSDave Kleikamp 3840960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3841960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3842960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3843960fd856STheodore Ts'o 3844bf43d84bSEric Sandeen /* 3845bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3846bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3847bf43d84bSEric Sandeen */ 38485a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 384930ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38505a9ae68aSDarrick J. Wong if (err) { 3851b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3852bf43d84bSEric Sandeen " too large to mount safely on this system"); 3853ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 385490c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3855ac27a0ecSDave Kleikamp goto failed_mount; 3856ac27a0ecSDave Kleikamp } 3857ac27a0ecSDave Kleikamp 3858617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3859617ba13bSMingming Cao goto cantfind_ext4; 3860e7c95593SEric Sandeen 38610f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38620f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38630f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3864b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3865b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38660f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38670f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38680f2ddca6SFrom: Thiemo Nagel } 38690f2ddca6SFrom: Thiemo Nagel 38704ec11028STheodore Ts'o /* 38714ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38724ec11028STheodore Ts'o * of the filesystem. 38734ec11028STheodore Ts'o */ 38744ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3875b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3876b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3877e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38784ec11028STheodore Ts'o ext4_blocks_count(es)); 3879e7c95593SEric Sandeen goto failed_mount; 3880e7c95593SEric Sandeen } 3881bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3882bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3883bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3884bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 38854ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3886b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 38874ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3888b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 38894ec11028STheodore Ts'o ext4_blocks_count(es), 38904ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 38914ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 38924ec11028STheodore Ts'o goto failed_mount; 38934ec11028STheodore Ts'o } 3894bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3895fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3896fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3897617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3898617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3899f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3900f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3901ac27a0ecSDave Kleikamp GFP_KERNEL); 3902ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3903b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 39042cde417dSTheodore Ts'o ret = -ENOMEM; 3905ac27a0ecSDave Kleikamp goto failed_mount; 3906ac27a0ecSDave Kleikamp } 3907ac27a0ecSDave Kleikamp 39089f6200bbSTheodore Ts'o if (ext4_proc_root) 39099f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3910240799cdSTheodore Ts'o 391166acdcf4STheodore Ts'o if (sbi->s_proc) 391266acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 391366acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 391466acdcf4STheodore Ts'o 3915705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3916ac27a0ecSDave Kleikamp 3917ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 391870bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3919a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3920ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3921b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3922b31e1552SEric Sandeen "can't read group descriptor %d", i); 3923ac27a0ecSDave Kleikamp db_count = i; 3924ac27a0ecSDave Kleikamp goto failed_mount2; 3925ac27a0ecSDave Kleikamp } 3926ac27a0ecSDave Kleikamp } 3927bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3928b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3929f9ae9cf5STheodore Ts'o goto failed_mount2; 3930ac27a0ecSDave Kleikamp } 3931772cb7c8SJose R. Santos 3932f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3933ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3934ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3935ac27a0ecSDave Kleikamp 393604496411STao Ma init_timer(&sbi->s_err_report); 393704496411STao Ma sbi->s_err_report.function = print_daily_error_info; 393804496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 393904496411STao Ma 3940a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3941eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3942ce7e010aSTheodore Ts'o goto failed_mount3; 3943ce7e010aSTheodore Ts'o 3944c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 394567a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3946c9de560dSAlex Tomas 3947f9ae9cf5STheodore Ts'o /* 3948f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3949f9ae9cf5STheodore Ts'o */ 3950f9ae9cf5STheodore Ts'o if (!test_opt(sb, NOLOAD) && 3951f9ae9cf5STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3952f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3953f9ae9cf5STheodore Ts'o else 3954f9ae9cf5STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3955617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3956617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3957ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3958617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3959262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 39607c319d32SAditya Kali sb->s_qcop = &ext4_qctl_sysfile_operations; 3961262b4662SJan Kara else 3962262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3963ac27a0ecSDave Kleikamp #endif 3964f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3965f2fa2ffcSAneesh Kumar K.V 3966ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39673b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3968ac27a0ecSDave Kleikamp 3969ac27a0ecSDave Kleikamp sb->s_root = NULL; 3970ac27a0ecSDave Kleikamp 3971ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3972617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3973617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3974ac27a0ecSDave Kleikamp 3975c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3976c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3977c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3978c5e06d10SJohann Lombardi goto failed_mount3; 3979c5e06d10SJohann Lombardi 3980ac27a0ecSDave Kleikamp /* 3981ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3982ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3983ac27a0ecSDave Kleikamp */ 3984ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3985617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3986617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3987ac27a0ecSDave Kleikamp goto failed_mount3; 39880390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 39890390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3990b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3991b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3992744692dcSJiaying Zhang goto failed_mount_wq; 3993ac27a0ecSDave Kleikamp } else { 3994fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 39950390131bSFrank Mayhar sbi->s_journal = NULL; 39960390131bSFrank Mayhar needs_recovery = 0; 39970390131bSFrank Mayhar goto no_journal; 3998ac27a0ecSDave Kleikamp } 3999ac27a0ecSDave Kleikamp 4000f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 4001eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4002eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4003b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4004744692dcSJiaying Zhang goto failed_mount_wq; 4005eb40a09cSJose R. Santos } 4006eb40a09cSJose R. Santos 400725ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 400825ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 400925ed6e8aSDarrick J. Wong "feature set"); 401025ed6e8aSDarrick J. Wong goto failed_mount_wq; 4011d4da6c9cSLinus Torvalds } 4012818d276cSGirish Shilamkar 4013ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4014ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4015ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4016ac27a0ecSDave Kleikamp case 0: 4017ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 401863f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 401963f57933SAndrew Morton * cope, else JOURNAL_DATA 402063f57933SAndrew Morton */ 4021dab291afSMingming Cao if (jbd2_journal_check_available_features 4022dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 4023fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4024ac27a0ecSDave Kleikamp else 4025fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4026ac27a0ecSDave Kleikamp break; 4027ac27a0ecSDave Kleikamp 4028617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4029617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4030dab291afSMingming Cao if (!jbd2_journal_check_available_features 4031dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4032b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4033b31e1552SEric Sandeen "requested data journaling mode"); 4034744692dcSJiaying Zhang goto failed_mount_wq; 4035ac27a0ecSDave Kleikamp } 4036ac27a0ecSDave Kleikamp default: 4037ac27a0ecSDave Kleikamp break; 4038ac27a0ecSDave Kleikamp } 4039b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4040ac27a0ecSDave Kleikamp 404118aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 404218aadd47SBobi Jam 4043ce7e010aSTheodore Ts'o no_journal: 40449c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 40459c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 40469c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40479c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40489c191f70ST Makphaibulchoke goto failed_mount_wq; 40499c191f70ST Makphaibulchoke } 40509c191f70ST Makphaibulchoke } 40519c191f70ST Makphaibulchoke 4052fd89d5f2STejun Heo /* 4053952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4054952fc18eSTheodore Ts'o * superblock if present. 4055952fc18eSTheodore Ts'o */ 4056952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4057952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4058952fc18eSTheodore Ts'o else { 405907aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 406007aa2ea1SLukas Czerner if (err) 4061952fc18eSTheodore Ts'o goto failed_mount_wq; 4062952fc18eSTheodore Ts'o } 4063952fc18eSTheodore Ts'o 4064952fc18eSTheodore Ts'o /* 4065fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4066fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4067fd89d5f2STejun Heo */ 40682e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40692e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40702e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40712e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 407207aa2ea1SLukas Czerner ret = -ENOMEM; 40732e8fa54eSJan Kara goto failed_mount4; 40742e8fa54eSJan Kara } 40752e8fa54eSJan Kara 4076ac27a0ecSDave Kleikamp /* 4077dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4078ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4079ac27a0ecSDave Kleikamp */ 4080ac27a0ecSDave Kleikamp 40811d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 40821d1fe1eeSDavid Howells if (IS_ERR(root)) { 4083b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 40841d1fe1eeSDavid Howells ret = PTR_ERR(root); 408532a9bb57SManish Katiyar root = NULL; 4086ac27a0ecSDave Kleikamp goto failed_mount4; 4087ac27a0ecSDave Kleikamp } 4088ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4089b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 409094bf608aSAl Viro iput(root); 4091ac27a0ecSDave Kleikamp goto failed_mount4; 4092ac27a0ecSDave Kleikamp } 409348fde701SAl Viro sb->s_root = d_make_root(root); 40941d1fe1eeSDavid Howells if (!sb->s_root) { 4095b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 40961d1fe1eeSDavid Howells ret = -ENOMEM; 40971d1fe1eeSDavid Howells goto failed_mount4; 40981d1fe1eeSDavid Howells } 4099ac27a0ecSDave Kleikamp 41007e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 41017e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4102ef7f3835SKalpak Shah 4103ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4104ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 4105ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4106ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4107ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 4108ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 4109ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4110ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4111ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4112ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4113ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4114ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4115ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4116ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4117ef7f3835SKalpak Shah } 4118ef7f3835SKalpak Shah } 4119ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4120ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4121ef7f3835SKalpak Shah sbi->s_inode_size) { 4122ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4123ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4124b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4125b31e1552SEric Sandeen "available"); 4126ef7f3835SKalpak Shah } 4127ef7f3835SKalpak Shah 412830fac0f7SJan Kara err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); 412927dd4385SLukas Czerner if (err) { 413027dd4385SLukas Czerner ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " 413130fac0f7SJan Kara "reserved pool", ext4_calculate_resv_clusters(sb)); 4132f9ae9cf5STheodore Ts'o goto failed_mount4a; 413327dd4385SLukas Czerner } 413427dd4385SLukas Czerner 41356fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 41366fd058f7STheodore Ts'o if (err) { 4137b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4138fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4139f9ae9cf5STheodore Ts'o goto failed_mount4a; 4140f9ae9cf5STheodore Ts'o } 4141f9ae9cf5STheodore Ts'o 4142f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4143f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4144f9ae9cf5STheodore Ts'o if (err) { 4145f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4146f9ae9cf5STheodore Ts'o err); 4147dcf2d804STao Ma goto failed_mount5; 4148c2774d84SAneesh Kumar K.V } 4149c2774d84SAneesh Kumar K.V 4150d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4151d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4152d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4153d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, block); 4154d5e03cbbSTheodore Ts'o if (!err) { 4155d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4156d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4157d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, freei); 4158d5e03cbbSTheodore Ts'o } 4159d5e03cbbSTheodore Ts'o if (!err) 4160d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4161d5e03cbbSTheodore Ts'o ext4_count_dirs(sb)); 4162d5e03cbbSTheodore Ts'o if (!err) 4163d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 4164d5e03cbbSTheodore Ts'o if (err) { 4165d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4166d5e03cbbSTheodore Ts'o goto failed_mount6; 4167d5e03cbbSTheodore Ts'o } 4168d5e03cbbSTheodore Ts'o 4169d5e03cbbSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 4170d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4171d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4172d5e03cbbSTheodore Ts'o "unable to initialize " 4173d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4174d5e03cbbSTheodore Ts'o goto failed_mount6; 4175d5e03cbbSTheodore Ts'o } 4176d5e03cbbSTheodore Ts'o 4177bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4178bfff6873SLukas Czerner if (err) 4179dcf2d804STao Ma goto failed_mount6; 4180bfff6873SLukas Czerner 41813197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 41823197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 41833197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 41843197ebdbSTheodore Ts'o "%s", sb->s_id); 4185dcf2d804STao Ma if (err) 4186dcf2d804STao Ma goto failed_mount7; 41873197ebdbSTheodore Ts'o 41889b2ff357SJan Kara #ifdef CONFIG_QUOTA 41899b2ff357SJan Kara /* Enable quota usage during mount. */ 41909b2ff357SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 41919b2ff357SJan Kara !(sb->s_flags & MS_RDONLY)) { 41929b2ff357SJan Kara err = ext4_enable_quotas(sb); 41939b2ff357SJan Kara if (err) 41949b2ff357SJan Kara goto failed_mount8; 41959b2ff357SJan Kara } 41969b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 41979b2ff357SJan Kara 4198617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4199617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4200617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 42010390131bSFrank Mayhar if (needs_recovery) { 4202b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4203617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 42040390131bSFrank Mayhar } 42050390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 42060390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 42070390131bSFrank Mayhar descr = " journalled data mode"; 42080390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 42090390131bSFrank Mayhar descr = " ordered data mode"; 42100390131bSFrank Mayhar else 42110390131bSFrank Mayhar descr = " writeback data mode"; 42120390131bSFrank Mayhar } else 42130390131bSFrank Mayhar descr = "out journal"; 42140390131bSFrank Mayhar 421579add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 421679add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 421779add3a3SLukas Czerner if (!blk_queue_discard(q)) 421879add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 421979add3a3SLukas Czerner "mounting with \"discard\" option, but " 422079add3a3SLukas Czerner "the device does not support discard"); 422179add3a3SLukas Czerner } 422279add3a3SLukas Czerner 4223d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 42248b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 42258b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4226ac27a0ecSDave Kleikamp 422766e61a9eSTheodore Ts'o if (es->s_error_count) 422866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4229ac27a0ecSDave Kleikamp 4230efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4231efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4232efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4233efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4234efbed4dcSTheodore Ts'o 4235d4c402d9SCurt Wohlgemuth kfree(orig_data); 4236ac27a0ecSDave Kleikamp return 0; 4237ac27a0ecSDave Kleikamp 4238617ba13bSMingming Cao cantfind_ext4: 4239ac27a0ecSDave Kleikamp if (!silent) 4240b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4241ac27a0ecSDave Kleikamp goto failed_mount; 4242ac27a0ecSDave Kleikamp 424372ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 424472ba7450STheodore Ts'o failed_mount8: 424572ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 424672ba7450STheodore Ts'o #endif 4247dcf2d804STao Ma failed_mount7: 4248dcf2d804STao Ma ext4_unregister_li_request(sb); 4249dcf2d804STao Ma failed_mount6: 4250f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4251d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4252d5e03cbbSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 4253d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4254d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4255d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4256d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 425700764937SAzat Khuzhin failed_mount5: 4258f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4259f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4260f9ae9cf5STheodore Ts'o failed_mount4a: 426194bf608aSAl Viro dput(sb->s_root); 426232a9bb57SManish Katiyar sb->s_root = NULL; 426394bf608aSAl Viro failed_mount4: 4264b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 42652e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 42662e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 42674c0425ffSMingming Cao failed_mount_wq: 42680390131bSFrank Mayhar if (sbi->s_journal) { 4269dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 427047b4a50bSJan Kara sbi->s_journal = NULL; 42710390131bSFrank Mayhar } 4272d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4273eb68d0e2SZheng Liu failed_mount3: 42749105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4275c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4276c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4277ac27a0ecSDave Kleikamp failed_mount2: 4278ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4279ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4280f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4281ac27a0ecSDave Kleikamp failed_mount: 42820441984aSDarrick J. Wong if (sbi->s_chksum_driver) 42830441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4284240799cdSTheodore Ts'o if (sbi->s_proc) { 428566acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 42869f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4287240799cdSTheodore Ts'o } 4288ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4289a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4290ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4291ac27a0ecSDave Kleikamp #endif 4292617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4293ac27a0ecSDave Kleikamp brelse(bh); 4294ac27a0ecSDave Kleikamp out_fail: 4295ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4296f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4297ac27a0ecSDave Kleikamp kfree(sbi); 4298dcc7dae3SCyrill Gorcunov out_free_orig: 4299d4c402d9SCurt Wohlgemuth kfree(orig_data); 430007aa2ea1SLukas Czerner return err ? err : ret; 4301ac27a0ecSDave Kleikamp } 4302ac27a0ecSDave Kleikamp 4303ac27a0ecSDave Kleikamp /* 4304ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4305ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4306ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4307ac27a0ecSDave Kleikamp */ 4308617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4309ac27a0ecSDave Kleikamp { 4310617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4311ac27a0ecSDave Kleikamp 4312ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 431330773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 431430773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4315ac27a0ecSDave Kleikamp 4316a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4317ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4318dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4319ac27a0ecSDave Kleikamp else 4320dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 43215bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 43225bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 43235bf5683aSHidehiro Kawai else 43245bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4325a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4326ac27a0ecSDave Kleikamp } 4327ac27a0ecSDave Kleikamp 4328617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4329ac27a0ecSDave Kleikamp unsigned int journal_inum) 4330ac27a0ecSDave Kleikamp { 4331ac27a0ecSDave Kleikamp struct inode *journal_inode; 4332ac27a0ecSDave Kleikamp journal_t *journal; 4333ac27a0ecSDave Kleikamp 43340390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43350390131bSFrank Mayhar 4336ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4337ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4338ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4339ac27a0ecSDave Kleikamp 43401d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43411d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4342b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4343ac27a0ecSDave Kleikamp return NULL; 4344ac27a0ecSDave Kleikamp } 4345ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4346ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4347ac27a0ecSDave Kleikamp iput(journal_inode); 4348b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4349ac27a0ecSDave Kleikamp return NULL; 4350ac27a0ecSDave Kleikamp } 4351ac27a0ecSDave Kleikamp 4352e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4353ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 43541d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4355b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4356ac27a0ecSDave Kleikamp iput(journal_inode); 4357ac27a0ecSDave Kleikamp return NULL; 4358ac27a0ecSDave Kleikamp } 4359ac27a0ecSDave Kleikamp 4360dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4361ac27a0ecSDave Kleikamp if (!journal) { 4362b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4363ac27a0ecSDave Kleikamp iput(journal_inode); 4364ac27a0ecSDave Kleikamp return NULL; 4365ac27a0ecSDave Kleikamp } 4366ac27a0ecSDave Kleikamp journal->j_private = sb; 4367617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4368ac27a0ecSDave Kleikamp return journal; 4369ac27a0ecSDave Kleikamp } 4370ac27a0ecSDave Kleikamp 4371617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4372ac27a0ecSDave Kleikamp dev_t j_dev) 4373ac27a0ecSDave Kleikamp { 4374ac27a0ecSDave Kleikamp struct buffer_head *bh; 4375ac27a0ecSDave Kleikamp journal_t *journal; 4376617ba13bSMingming Cao ext4_fsblk_t start; 4377617ba13bSMingming Cao ext4_fsblk_t len; 4378ac27a0ecSDave Kleikamp int hblock, blocksize; 4379617ba13bSMingming Cao ext4_fsblk_t sb_block; 4380ac27a0ecSDave Kleikamp unsigned long offset; 4381617ba13bSMingming Cao struct ext4_super_block *es; 4382ac27a0ecSDave Kleikamp struct block_device *bdev; 4383ac27a0ecSDave Kleikamp 43840390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43850390131bSFrank Mayhar 4386b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4387ac27a0ecSDave Kleikamp if (bdev == NULL) 4388ac27a0ecSDave Kleikamp return NULL; 4389ac27a0ecSDave Kleikamp 4390ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4391e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4392ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4393b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4394b31e1552SEric Sandeen "blocksize too small for journal device"); 4395ac27a0ecSDave Kleikamp goto out_bdev; 4396ac27a0ecSDave Kleikamp } 4397ac27a0ecSDave Kleikamp 4398617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4399617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4400ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4401ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4402b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4403b31e1552SEric Sandeen "external journal"); 4404ac27a0ecSDave Kleikamp goto out_bdev; 4405ac27a0ecSDave Kleikamp } 4406ac27a0ecSDave Kleikamp 44072716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4408617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4409ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4410617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4411b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4412b31e1552SEric Sandeen "bad superblock"); 4413ac27a0ecSDave Kleikamp brelse(bh); 4414ac27a0ecSDave Kleikamp goto out_bdev; 4415ac27a0ecSDave Kleikamp } 4416ac27a0ecSDave Kleikamp 4417*df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4418*df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4419*df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4420*df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4421*df4763beSDarrick J. Wong "corrupt superblock"); 4422*df4763beSDarrick J. Wong brelse(bh); 4423*df4763beSDarrick J. Wong goto out_bdev; 4424*df4763beSDarrick J. Wong } 4425*df4763beSDarrick J. Wong 4426617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4427b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4428ac27a0ecSDave Kleikamp brelse(bh); 4429ac27a0ecSDave Kleikamp goto out_bdev; 4430ac27a0ecSDave Kleikamp } 4431ac27a0ecSDave Kleikamp 4432bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4433ac27a0ecSDave Kleikamp start = sb_block + 1; 4434ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4435ac27a0ecSDave Kleikamp 4436dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4437ac27a0ecSDave Kleikamp start, len, blocksize); 4438ac27a0ecSDave Kleikamp if (!journal) { 4439b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4440ac27a0ecSDave Kleikamp goto out_bdev; 4441ac27a0ecSDave Kleikamp } 4442ac27a0ecSDave Kleikamp journal->j_private = sb; 44439f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4444ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4445ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4446b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4447ac27a0ecSDave Kleikamp goto out_journal; 4448ac27a0ecSDave Kleikamp } 4449ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4450b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4451b31e1552SEric Sandeen "user (unsupported) - %d", 4452ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4453ac27a0ecSDave Kleikamp goto out_journal; 4454ac27a0ecSDave Kleikamp } 4455617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4456617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4457ac27a0ecSDave Kleikamp return journal; 44580b8e58a1SAndreas Dilger 4459ac27a0ecSDave Kleikamp out_journal: 4460dab291afSMingming Cao jbd2_journal_destroy(journal); 4461ac27a0ecSDave Kleikamp out_bdev: 4462617ba13bSMingming Cao ext4_blkdev_put(bdev); 4463ac27a0ecSDave Kleikamp return NULL; 4464ac27a0ecSDave Kleikamp } 4465ac27a0ecSDave Kleikamp 4466617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4467617ba13bSMingming Cao struct ext4_super_block *es, 4468ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4469ac27a0ecSDave Kleikamp { 4470ac27a0ecSDave Kleikamp journal_t *journal; 4471ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4472ac27a0ecSDave Kleikamp dev_t journal_dev; 4473ac27a0ecSDave Kleikamp int err = 0; 4474ac27a0ecSDave Kleikamp int really_read_only; 4475ac27a0ecSDave Kleikamp 44760390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44770390131bSFrank Mayhar 4478ac27a0ecSDave Kleikamp if (journal_devnum && 4479ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4480b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4481b31e1552SEric Sandeen "numbers have changed"); 4482ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4483ac27a0ecSDave Kleikamp } else 4484ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4485ac27a0ecSDave Kleikamp 4486ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4487ac27a0ecSDave Kleikamp 4488ac27a0ecSDave Kleikamp /* 4489ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4490ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4491ac27a0ecSDave Kleikamp * can get read-write access to the device. 4492ac27a0ecSDave Kleikamp */ 4493617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4494ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4495b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4496b31e1552SEric Sandeen "required on readonly filesystem"); 4497ac27a0ecSDave Kleikamp if (really_read_only) { 4498b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4499b31e1552SEric Sandeen "unavailable, cannot proceed"); 4500ac27a0ecSDave Kleikamp return -EROFS; 4501ac27a0ecSDave Kleikamp } 4502b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4503b31e1552SEric Sandeen "be enabled during recovery"); 4504ac27a0ecSDave Kleikamp } 4505ac27a0ecSDave Kleikamp } 4506ac27a0ecSDave Kleikamp 4507ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4508b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4509b31e1552SEric Sandeen "and inode journals!"); 4510ac27a0ecSDave Kleikamp return -EINVAL; 4511ac27a0ecSDave Kleikamp } 4512ac27a0ecSDave Kleikamp 4513ac27a0ecSDave Kleikamp if (journal_inum) { 4514617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4515ac27a0ecSDave Kleikamp return -EINVAL; 4516ac27a0ecSDave Kleikamp } else { 4517617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4518ac27a0ecSDave Kleikamp return -EINVAL; 4519ac27a0ecSDave Kleikamp } 4520ac27a0ecSDave Kleikamp 452190576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4522b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 45234776004fSTheodore Ts'o 4524617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4525dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 45261c13d5c0STheodore Ts'o if (!err) { 45271c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 45281c13d5c0STheodore Ts'o if (save) 45291c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 45301c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4531dab291afSMingming Cao err = jbd2_journal_load(journal); 45321c13d5c0STheodore Ts'o if (save) 45331c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 45341c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 45351c13d5c0STheodore Ts'o kfree(save); 45361c13d5c0STheodore Ts'o } 4537ac27a0ecSDave Kleikamp 4538ac27a0ecSDave Kleikamp if (err) { 4539b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4540dab291afSMingming Cao jbd2_journal_destroy(journal); 4541ac27a0ecSDave Kleikamp return err; 4542ac27a0ecSDave Kleikamp } 4543ac27a0ecSDave Kleikamp 4544617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4545617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4546ac27a0ecSDave Kleikamp 4547c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4548ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4549ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4550ac27a0ecSDave Kleikamp 4551ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4552e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4553ac27a0ecSDave Kleikamp } 4554ac27a0ecSDave Kleikamp 4555ac27a0ecSDave Kleikamp return 0; 4556ac27a0ecSDave Kleikamp } 4557ac27a0ecSDave Kleikamp 4558e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4559ac27a0ecSDave Kleikamp { 4560e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4561617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4562c4be0c1dSTakashi Sato int error = 0; 4563ac27a0ecSDave Kleikamp 45647c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4565c4be0c1dSTakashi Sato return error; 4566914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4567914258bfSTheodore Ts'o /* 4568914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4569914258bfSTheodore Ts'o * superblock failed. This could happen because the 4570914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4571914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4572914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4573914258bfSTheodore Ts'o * write and hope for the best. 4574914258bfSTheodore Ts'o */ 4575b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4576b31e1552SEric Sandeen "superblock detected"); 4577914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4578914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4579914258bfSTheodore Ts'o } 458071290b36STheodore Ts'o /* 458171290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 458271290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 458371290b36STheodore Ts'o * write time when we are mounting the root file system 458471290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 458571290b36STheodore Ts'o * for people who are east of GMT and who make their clock 458671290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 458771290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 458871290b36STheodore Ts'o * to complain and force a full file system check. 458971290b36STheodore Ts'o */ 459071290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4591ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4592f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4593afc32f7eSTheodore Ts'o es->s_kbytes_written = 4594afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4595afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4596afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4597f613dfcbSTheodore Ts'o else 4598f613dfcbSTheodore Ts'o es->s_kbytes_written = 4599f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4600d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 460157042651STheodore Ts'o ext4_free_blocks_count_set(es, 460257042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 460357042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4604d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 46057f93cff9STheodore Ts'o es->s_free_inodes_count = 46067f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 46075d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4608ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 460906db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4610ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4611914258bfSTheodore Ts'o if (sync) { 4612c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4613c4be0c1dSTakashi Sato if (error) 4614c4be0c1dSTakashi Sato return error; 4615c4be0c1dSTakashi Sato 4616c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4617c4be0c1dSTakashi Sato if (error) { 4618b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4619b31e1552SEric Sandeen "superblock"); 4620914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4621914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4622914258bfSTheodore Ts'o } 4623914258bfSTheodore Ts'o } 4624c4be0c1dSTakashi Sato return error; 4625ac27a0ecSDave Kleikamp } 4626ac27a0ecSDave Kleikamp 4627ac27a0ecSDave Kleikamp /* 4628ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4629ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4630ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4631ac27a0ecSDave Kleikamp */ 4632617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4633617ba13bSMingming Cao struct ext4_super_block *es) 4634ac27a0ecSDave Kleikamp { 4635617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4636ac27a0ecSDave Kleikamp 46370390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 46380390131bSFrank Mayhar BUG_ON(journal != NULL); 46390390131bSFrank Mayhar return; 46400390131bSFrank Mayhar } 4641dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46427ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 46437ffe1ea8SHidehiro Kawai goto out; 46447ffe1ea8SHidehiro Kawai 4645617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4646ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4647617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4648e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4649ac27a0ecSDave Kleikamp } 46507ffe1ea8SHidehiro Kawai 46517ffe1ea8SHidehiro Kawai out: 4652dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4653ac27a0ecSDave Kleikamp } 4654ac27a0ecSDave Kleikamp 4655ac27a0ecSDave Kleikamp /* 4656ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4657ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4658ac27a0ecSDave Kleikamp * main filesystem now. 4659ac27a0ecSDave Kleikamp */ 4660617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4661617ba13bSMingming Cao struct ext4_super_block *es) 4662ac27a0ecSDave Kleikamp { 4663ac27a0ecSDave Kleikamp journal_t *journal; 4664ac27a0ecSDave Kleikamp int j_errno; 4665ac27a0ecSDave Kleikamp const char *errstr; 4666ac27a0ecSDave Kleikamp 46670390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 46680390131bSFrank Mayhar 4669617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4670ac27a0ecSDave Kleikamp 4671ac27a0ecSDave Kleikamp /* 4672ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4673617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4674ac27a0ecSDave Kleikamp */ 4675ac27a0ecSDave Kleikamp 4676dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4677ac27a0ecSDave Kleikamp if (j_errno) { 4678ac27a0ecSDave Kleikamp char nbuf[16]; 4679ac27a0ecSDave Kleikamp 4680617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 468112062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4682ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 468312062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4684ac27a0ecSDave Kleikamp 4685617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4686617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4687e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4688ac27a0ecSDave Kleikamp 4689dab291afSMingming Cao jbd2_journal_clear_err(journal); 4690d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4691ac27a0ecSDave Kleikamp } 4692ac27a0ecSDave Kleikamp } 4693ac27a0ecSDave Kleikamp 4694ac27a0ecSDave Kleikamp /* 4695ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4696ac27a0ecSDave Kleikamp * and wait on the commit. 4697ac27a0ecSDave Kleikamp */ 4698617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4699ac27a0ecSDave Kleikamp { 4700ac27a0ecSDave Kleikamp journal_t *journal; 4701ac27a0ecSDave Kleikamp 4702ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4703ac27a0ecSDave Kleikamp return 0; 4704ac27a0ecSDave Kleikamp 4705617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4706b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4707ac27a0ecSDave Kleikamp } 4708ac27a0ecSDave Kleikamp 4709617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4710ac27a0ecSDave Kleikamp { 471114ce0cb4STheodore Ts'o int ret = 0; 47129eddacf9SJan Kara tid_t target; 471306a407f1SDmitry Monakhov bool needs_barrier = false; 47148d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4715ac27a0ecSDave Kleikamp 47169bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 47172e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4718a1177825SJan Kara /* 4719a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4720a1177825SJan Kara * no dirty dquots 4721a1177825SJan Kara */ 4722a1177825SJan Kara dquot_writeback_dquots(sb, -1); 472306a407f1SDmitry Monakhov /* 472406a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 472506a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 472606a407f1SDmitry Monakhov * transaction_commit will do it for us. 472706a407f1SDmitry Monakhov */ 472806a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 472906a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 473006a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 473106a407f1SDmitry Monakhov needs_barrier = true; 473206a407f1SDmitry Monakhov 47338d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4734ac27a0ecSDave Kleikamp if (wait) 473506a407f1SDmitry Monakhov ret = jbd2_log_wait_commit(sbi->s_journal, target); 47360390131bSFrank Mayhar } 473706a407f1SDmitry Monakhov if (needs_barrier) { 473806a407f1SDmitry Monakhov int err; 473906a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 474006a407f1SDmitry Monakhov if (!ret) 474106a407f1SDmitry Monakhov ret = err; 474206a407f1SDmitry Monakhov } 474306a407f1SDmitry Monakhov 474406a407f1SDmitry Monakhov return ret; 474506a407f1SDmitry Monakhov } 474606a407f1SDmitry Monakhov 474706a407f1SDmitry Monakhov static int ext4_sync_fs_nojournal(struct super_block *sb, int wait) 474806a407f1SDmitry Monakhov { 474906a407f1SDmitry Monakhov int ret = 0; 475006a407f1SDmitry Monakhov 475106a407f1SDmitry Monakhov trace_ext4_sync_fs(sb, wait); 475206a407f1SDmitry Monakhov flush_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 475306a407f1SDmitry Monakhov dquot_writeback_dquots(sb, -1); 475406a407f1SDmitry Monakhov if (wait && test_opt(sb, BARRIER)) 475506a407f1SDmitry Monakhov ret = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 475606a407f1SDmitry Monakhov 475714ce0cb4STheodore Ts'o return ret; 4758ac27a0ecSDave Kleikamp } 4759ac27a0ecSDave Kleikamp 4760ac27a0ecSDave Kleikamp /* 4761ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4762ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4763be4f27d3SYongqiang Yang * 4764be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 47658e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 47668e8ad8a5SJan Kara * modifications. 4767ac27a0ecSDave Kleikamp */ 4768c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4769ac27a0ecSDave Kleikamp { 4770c4be0c1dSTakashi Sato int error = 0; 4771c4be0c1dSTakashi Sato journal_t *journal; 4772ac27a0ecSDave Kleikamp 47739ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47749ca92389STheodore Ts'o return 0; 47759ca92389STheodore Ts'o 4776c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4777ac27a0ecSDave Kleikamp 4778ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4779dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47807ffe1ea8SHidehiro Kawai 47817ffe1ea8SHidehiro Kawai /* 47829ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 47839ca92389STheodore Ts'o * the journal. 47847ffe1ea8SHidehiro Kawai */ 4785c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 47866b0310fbSEric Sandeen if (error < 0) 47876b0310fbSEric Sandeen goto out; 4788ac27a0ecSDave Kleikamp 4789ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4790617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4791e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 47926b0310fbSEric Sandeen out: 47938e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 47946b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 47956b0310fbSEric Sandeen return error; 4796ac27a0ecSDave Kleikamp } 4797ac27a0ecSDave Kleikamp 4798ac27a0ecSDave Kleikamp /* 4799ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4800ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4801ac27a0ecSDave Kleikamp */ 4802c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4803ac27a0ecSDave Kleikamp { 48049ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 48059ca92389STheodore Ts'o return 0; 48069ca92389STheodore Ts'o 48079ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4808617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4809e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4810c4be0c1dSTakashi Sato return 0; 4811ac27a0ecSDave Kleikamp } 4812ac27a0ecSDave Kleikamp 4813673c6100STheodore Ts'o /* 4814673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4815673c6100STheodore Ts'o */ 4816673c6100STheodore Ts'o struct ext4_mount_options { 4817673c6100STheodore Ts'o unsigned long s_mount_opt; 4818a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 481908cefc7aSEric W. Biederman kuid_t s_resuid; 482008cefc7aSEric W. Biederman kgid_t s_resgid; 4821673c6100STheodore Ts'o unsigned long s_commit_interval; 4822673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4823673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4824673c6100STheodore Ts'o int s_jquota_fmt; 4825a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4826673c6100STheodore Ts'o #endif 4827673c6100STheodore Ts'o }; 4828673c6100STheodore Ts'o 4829617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4830ac27a0ecSDave Kleikamp { 4831617ba13bSMingming Cao struct ext4_super_block *es; 4832617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4833ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4834617ba13bSMingming Cao struct ext4_mount_options old_opts; 4835c79d967dSChristoph Hellwig int enable_quota = 0; 48368a266467STheodore Ts'o ext4_group_t g; 4837b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4838c5e06d10SJohann Lombardi int err = 0; 4839ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 484003dafb5fSChen Gang int i, j; 4841ac27a0ecSDave Kleikamp #endif 4842d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4843ac27a0ecSDave Kleikamp 4844ac27a0ecSDave Kleikamp /* Store the original options */ 4845ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4846ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4847a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4848ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4849ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4850ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 485130773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 485230773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4853ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4854ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4855a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 485603dafb5fSChen Gang if (sbi->s_qf_names[i]) { 485703dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 485803dafb5fSChen Gang GFP_KERNEL); 485903dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 486003dafb5fSChen Gang for (j = 0; j < i; j++) 486103dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 48623e36a163SWei Yongjun kfree(orig_data); 486303dafb5fSChen Gang return -ENOMEM; 486403dafb5fSChen Gang } 486503dafb5fSChen Gang } else 486603dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4867ac27a0ecSDave Kleikamp #endif 4868b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4869b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4870ac27a0ecSDave Kleikamp 4871ac27a0ecSDave Kleikamp /* 4872ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4873ac27a0ecSDave Kleikamp */ 4874661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4875ac27a0ecSDave Kleikamp err = -EINVAL; 4876ac27a0ecSDave Kleikamp goto restore_opts; 4877ac27a0ecSDave Kleikamp } 4878ac27a0ecSDave Kleikamp 48796ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 48806ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 48816ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48826ae6514bSPiotr Sarna "both data=journal and delalloc"); 48836ae6514bSPiotr Sarna err = -EINVAL; 48846ae6514bSPiotr Sarna goto restore_opts; 48856ae6514bSPiotr Sarna } 48866ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 48876ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48886ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 48896ae6514bSPiotr Sarna err = -EINVAL; 48906ae6514bSPiotr Sarna goto restore_opts; 48916ae6514bSPiotr Sarna } 48926ae6514bSPiotr Sarna } 48936ae6514bSPiotr Sarna 48944ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4895c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4896ac27a0ecSDave Kleikamp 4897ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4898482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4899ac27a0ecSDave Kleikamp 4900ac27a0ecSDave Kleikamp es = sbi->s_es; 4901ac27a0ecSDave Kleikamp 4902b3881f74STheodore Ts'o if (sbi->s_journal) { 4903617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4904b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4905b3881f74STheodore Ts'o } 4906ac27a0ecSDave Kleikamp 4907661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 49084ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4909ac27a0ecSDave Kleikamp err = -EROFS; 4910ac27a0ecSDave Kleikamp goto restore_opts; 4911ac27a0ecSDave Kleikamp } 4912ac27a0ecSDave Kleikamp 4913ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 491438c03b34STheodore Ts'o err = sync_filesystem(sb); 491538c03b34STheodore Ts'o if (err < 0) 491638c03b34STheodore Ts'o goto restore_opts; 49170f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 49180f0dd62fSChristoph Hellwig if (err < 0) 4919c79d967dSChristoph Hellwig goto restore_opts; 4920c79d967dSChristoph Hellwig 4921ac27a0ecSDave Kleikamp /* 4922ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4923ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4924ac27a0ecSDave Kleikamp */ 4925ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4926ac27a0ecSDave Kleikamp 4927ac27a0ecSDave Kleikamp /* 4928ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4929ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4930ac27a0ecSDave Kleikamp * mark the partition as valid again. 4931ac27a0ecSDave Kleikamp */ 4932617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4933617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4934ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4935ac27a0ecSDave Kleikamp 4936a63c9eb2STheodore Ts'o if (sbi->s_journal) 4937617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4938ac27a0ecSDave Kleikamp } else { 4939a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4940a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4941ac27a0ecSDave Kleikamp err = -EROFS; 4942ac27a0ecSDave Kleikamp goto restore_opts; 4943ac27a0ecSDave Kleikamp } 4944ead6596bSEric Sandeen /* 49458a266467STheodore Ts'o * Make sure the group descriptor checksums 49460b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 49478a266467STheodore Ts'o */ 49488a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 49498a266467STheodore Ts'o struct ext4_group_desc *gdp = 49508a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 49518a266467STheodore Ts'o 4952feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4953b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4954b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 49558a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 49568a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 49578a266467STheodore Ts'o err = -EINVAL; 49588a266467STheodore Ts'o goto restore_opts; 49598a266467STheodore Ts'o } 49608a266467STheodore Ts'o } 49618a266467STheodore Ts'o 49628a266467STheodore Ts'o /* 4963ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4964ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4965ead6596bSEric Sandeen * require a full umount/remount for now. 4966ead6596bSEric Sandeen */ 4967ead6596bSEric Sandeen if (es->s_last_orphan) { 4968b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4969ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4970ead6596bSEric Sandeen "orphan inode list. Please " 4971b31e1552SEric Sandeen "umount/remount instead"); 4972ead6596bSEric Sandeen err = -EINVAL; 4973ead6596bSEric Sandeen goto restore_opts; 4974ead6596bSEric Sandeen } 4975ead6596bSEric Sandeen 4976ac27a0ecSDave Kleikamp /* 4977ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4978ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4979ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4980ac27a0ecSDave Kleikamp * the partition.) 4981ac27a0ecSDave Kleikamp */ 49820390131bSFrank Mayhar if (sbi->s_journal) 4983617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4984ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4985617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4986ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4987c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4988c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4989c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4990c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4991c5e06d10SJohann Lombardi err = -EROFS; 4992c5e06d10SJohann Lombardi goto restore_opts; 4993c5e06d10SJohann Lombardi } 4994c79d967dSChristoph Hellwig enable_quota = 1; 4995ac27a0ecSDave Kleikamp } 4996ac27a0ecSDave Kleikamp } 4997bfff6873SLukas Czerner 4998bfff6873SLukas Czerner /* 4999bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5000bfff6873SLukas Czerner * current settings 5001bfff6873SLukas Czerner */ 5002bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 5003bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5004bfff6873SLukas Czerner else { 5005bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5006bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5007bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5008bfff6873SLukas Czerner } 5009bfff6873SLukas Czerner 50106fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5011d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 5012e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 50130390131bSFrank Mayhar 5014ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5015ac27a0ecSDave Kleikamp /* Release old quota file names */ 5016a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5017ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 50187c319d32SAditya Kali if (enable_quota) { 50197c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 50200f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 50217c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 50227c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 50237c319d32SAditya Kali err = ext4_enable_quotas(sb); 502407724f98STheodore Ts'o if (err) 50257c319d32SAditya Kali goto restore_opts; 50267c319d32SAditya Kali } 50277c319d32SAditya Kali } 50287c319d32SAditya Kali #endif 5029d4c402d9SCurt Wohlgemuth 5030d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5031d4c402d9SCurt Wohlgemuth kfree(orig_data); 5032ac27a0ecSDave Kleikamp return 0; 50330b8e58a1SAndreas Dilger 5034ac27a0ecSDave Kleikamp restore_opts: 5035ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5036ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5037a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5038ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5039ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5040ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 504130773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 504230773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5043ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5044ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5045a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5046ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5047ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5048ac27a0ecSDave Kleikamp } 5049ac27a0ecSDave Kleikamp #endif 5050d4c402d9SCurt Wohlgemuth kfree(orig_data); 5051ac27a0ecSDave Kleikamp return err; 5052ac27a0ecSDave Kleikamp } 5053ac27a0ecSDave Kleikamp 5054617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5055ac27a0ecSDave Kleikamp { 5056ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5057617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5058617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 505927dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5060960cc398SPekka Enberg u64 fsid; 5061d02a9391SKazuya Mio s64 bfree; 506227dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5063ac27a0ecSDave Kleikamp 5064952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5065952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5066ac27a0ecSDave Kleikamp 5067617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5068ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5069b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 507057042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 507157042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5072d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 507357042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 507427dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 507527dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 507627dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5077ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5078ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 507952d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5080617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5081960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5082960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5083960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5084960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 50850b8e58a1SAndreas Dilger 5086ac27a0ecSDave Kleikamp return 0; 5087ac27a0ecSDave Kleikamp } 5088ac27a0ecSDave Kleikamp 50890b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 50900b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5091ac27a0ecSDave Kleikamp * Process 1 Process 2 5092617ba13bSMingming Cao * ext4_create() quota_sync() 5093dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5094871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5095dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5096ac27a0ecSDave Kleikamp * 5097ac27a0ecSDave Kleikamp */ 5098ac27a0ecSDave Kleikamp 5099ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5100ac27a0ecSDave Kleikamp 5101ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5102ac27a0ecSDave Kleikamp { 51034c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5104ac27a0ecSDave Kleikamp } 5105ac27a0ecSDave Kleikamp 5106617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5107ac27a0ecSDave Kleikamp { 5108ac27a0ecSDave Kleikamp int ret, err; 5109ac27a0ecSDave Kleikamp handle_t *handle; 5110ac27a0ecSDave Kleikamp struct inode *inode; 5111ac27a0ecSDave Kleikamp 5112ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 51139924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5114617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5115ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5116ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5117ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5118617ba13bSMingming Cao err = ext4_journal_stop(handle); 5119ac27a0ecSDave Kleikamp if (!ret) 5120ac27a0ecSDave Kleikamp ret = err; 5121ac27a0ecSDave Kleikamp return ret; 5122ac27a0ecSDave Kleikamp } 5123ac27a0ecSDave Kleikamp 5124617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5125ac27a0ecSDave Kleikamp { 5126ac27a0ecSDave Kleikamp int ret, err; 5127ac27a0ecSDave Kleikamp handle_t *handle; 5128ac27a0ecSDave Kleikamp 51299924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5130617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5131ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5132ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5133ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5134617ba13bSMingming Cao err = ext4_journal_stop(handle); 5135ac27a0ecSDave Kleikamp if (!ret) 5136ac27a0ecSDave Kleikamp ret = err; 5137ac27a0ecSDave Kleikamp return ret; 5138ac27a0ecSDave Kleikamp } 5139ac27a0ecSDave Kleikamp 5140617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5141ac27a0ecSDave Kleikamp { 5142ac27a0ecSDave Kleikamp int ret, err; 5143ac27a0ecSDave Kleikamp handle_t *handle; 5144ac27a0ecSDave Kleikamp 51459924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5146617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 51479c3013e9SJan Kara if (IS_ERR(handle)) { 51489c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 51499c3013e9SJan Kara dquot_release(dquot); 5150ac27a0ecSDave Kleikamp return PTR_ERR(handle); 51519c3013e9SJan Kara } 5152ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5153617ba13bSMingming Cao err = ext4_journal_stop(handle); 5154ac27a0ecSDave Kleikamp if (!ret) 5155ac27a0ecSDave Kleikamp ret = err; 5156ac27a0ecSDave Kleikamp return ret; 5157ac27a0ecSDave Kleikamp } 5158ac27a0ecSDave Kleikamp 5159617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5160ac27a0ecSDave Kleikamp { 5161262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5162262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5163262b4662SJan Kara 51642c8be6b2SJan Kara /* Are we journaling quotas? */ 5165262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 5166262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5167ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5168617ba13bSMingming Cao return ext4_write_dquot(dquot); 5169ac27a0ecSDave Kleikamp } else { 5170ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5171ac27a0ecSDave Kleikamp } 5172ac27a0ecSDave Kleikamp } 5173ac27a0ecSDave Kleikamp 5174617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5175ac27a0ecSDave Kleikamp { 5176ac27a0ecSDave Kleikamp int ret, err; 5177ac27a0ecSDave Kleikamp handle_t *handle; 5178ac27a0ecSDave Kleikamp 5179ac27a0ecSDave Kleikamp /* Data block + inode block */ 51809924a92aSTheodore Ts'o handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); 5181ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5182ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5183ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5184617ba13bSMingming Cao err = ext4_journal_stop(handle); 5185ac27a0ecSDave Kleikamp if (!ret) 5186ac27a0ecSDave Kleikamp ret = err; 5187ac27a0ecSDave Kleikamp return ret; 5188ac27a0ecSDave Kleikamp } 5189ac27a0ecSDave Kleikamp 5190ac27a0ecSDave Kleikamp /* 5191ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5192ac27a0ecSDave Kleikamp * the quota file and such... 5193ac27a0ecSDave Kleikamp */ 5194617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5195ac27a0ecSDave Kleikamp { 5196287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5197617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5198ac27a0ecSDave Kleikamp } 5199ac27a0ecSDave Kleikamp 5200ac27a0ecSDave Kleikamp /* 5201ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5202ac27a0ecSDave Kleikamp */ 5203617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5204f00c9e44SJan Kara struct path *path) 5205ac27a0ecSDave Kleikamp { 5206ac27a0ecSDave Kleikamp int err; 5207ac27a0ecSDave Kleikamp 5208ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5209ac27a0ecSDave Kleikamp return -EINVAL; 52100623543bSJan Kara 5211ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5212d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5213ac27a0ecSDave Kleikamp return -EXDEV; 52140623543bSJan Kara /* Journaling quota? */ 52150623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 52162b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5217f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5218b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5219b31e1552SEric Sandeen "Quota file not on filesystem root. " 5220b31e1552SEric Sandeen "Journaled quota will not work"); 52210623543bSJan Kara } 52220623543bSJan Kara 52230623543bSJan Kara /* 52240623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 52250623543bSJan Kara * all updates to the file when we bypass pagecache... 52260623543bSJan Kara */ 52270390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 5228f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 52290623543bSJan Kara /* 52300623543bSJan Kara * We don't need to lock updates but journal_flush() could 52310623543bSJan Kara * otherwise be livelocked... 52320623543bSJan Kara */ 52330623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 52347ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 52350623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5236f00c9e44SJan Kara if (err) 52377ffe1ea8SHidehiro Kawai return err; 52387ffe1ea8SHidehiro Kawai } 52390623543bSJan Kara 5240f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5241ac27a0ecSDave Kleikamp } 5242ac27a0ecSDave Kleikamp 52437c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 52447c319d32SAditya Kali unsigned int flags) 52457c319d32SAditya Kali { 52467c319d32SAditya Kali int err; 52477c319d32SAditya Kali struct inode *qf_inode; 5248a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52497c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52507c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52517c319d32SAditya Kali }; 52527c319d32SAditya Kali 52537c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 52547c319d32SAditya Kali 52557c319d32SAditya Kali if (!qf_inums[type]) 52567c319d32SAditya Kali return -EPERM; 52577c319d32SAditya Kali 52587c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 52597c319d32SAditya Kali if (IS_ERR(qf_inode)) { 52607c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 52617c319d32SAditya Kali return PTR_ERR(qf_inode); 52627c319d32SAditya Kali } 52637c319d32SAditya Kali 5264bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5265bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 52667c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 52677c319d32SAditya Kali iput(qf_inode); 52687c319d32SAditya Kali 52697c319d32SAditya Kali return err; 52707c319d32SAditya Kali } 52717c319d32SAditya Kali 52727c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 52737c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 52747c319d32SAditya Kali { 52757c319d32SAditya Kali int type, err = 0; 5276a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52777c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52787c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52797c319d32SAditya Kali }; 52807c319d32SAditya Kali 52817c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5282a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 52837c319d32SAditya Kali if (qf_inums[type]) { 52847c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 52857c319d32SAditya Kali DQUOT_USAGE_ENABLED); 52867c319d32SAditya Kali if (err) { 52877c319d32SAditya Kali ext4_warning(sb, 528872ba7450STheodore Ts'o "Failed to enable quota tracking " 528972ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 529072ba7450STheodore Ts'o "e2fsck to fix.", type, err); 52917c319d32SAditya Kali return err; 52927c319d32SAditya Kali } 52937c319d32SAditya Kali } 52947c319d32SAditya Kali } 52957c319d32SAditya Kali return 0; 52967c319d32SAditya Kali } 52977c319d32SAditya Kali 52987c319d32SAditya Kali /* 52997c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 53007c319d32SAditya Kali */ 53017c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 53027c319d32SAditya Kali int format_id) 53037c319d32SAditya Kali { 53047c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 53057c319d32SAditya Kali return -EINVAL; 53067c319d32SAditya Kali 53077c319d32SAditya Kali /* 53087c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 53097c319d32SAditya Kali */ 53107c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 53117c319d32SAditya Kali } 53127c319d32SAditya Kali 5313ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5314ca0e05e4SDmitry Monakhov { 531521f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 531621f97697SJan Kara handle_t *handle; 531721f97697SJan Kara 531887009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 531987009d86SDmitry Monakhov * Caller already holds s_umount sem */ 532087009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5321ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5322ca0e05e4SDmitry Monakhov 53230b268590SAmir Goldstein if (!inode) 53240b268590SAmir Goldstein goto out; 53250b268590SAmir Goldstein 532621f97697SJan Kara /* Update modification times of quota files when userspace can 532721f97697SJan Kara * start looking at them */ 53289924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 532921f97697SJan Kara if (IS_ERR(handle)) 533021f97697SJan Kara goto out; 533121f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 533221f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 533321f97697SJan Kara ext4_journal_stop(handle); 533421f97697SJan Kara 533521f97697SJan Kara out: 5336ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5337ca0e05e4SDmitry Monakhov } 5338ca0e05e4SDmitry Monakhov 53397c319d32SAditya Kali /* 53407c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 53417c319d32SAditya Kali */ 53427c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 53437c319d32SAditya Kali { 53447c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 53457c319d32SAditya Kali return -EINVAL; 53467c319d32SAditya Kali 53477c319d32SAditya Kali /* Disable only the limits. */ 53487c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 53497c319d32SAditya Kali } 53507c319d32SAditya Kali 5351ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5352ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5353ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5354ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5355617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5356ac27a0ecSDave Kleikamp size_t len, loff_t off) 5357ac27a0ecSDave Kleikamp { 5358ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5359725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5360ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5361ac27a0ecSDave Kleikamp int tocopy; 5362ac27a0ecSDave Kleikamp size_t toread; 5363ac27a0ecSDave Kleikamp struct buffer_head *bh; 5364ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5365ac27a0ecSDave Kleikamp 5366ac27a0ecSDave Kleikamp if (off > i_size) 5367ac27a0ecSDave Kleikamp return 0; 5368ac27a0ecSDave Kleikamp if (off+len > i_size) 5369ac27a0ecSDave Kleikamp len = i_size-off; 5370ac27a0ecSDave Kleikamp toread = len; 5371ac27a0ecSDave Kleikamp while (toread > 0) { 5372ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5373ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 53741c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 53751c215028STheodore Ts'o if (IS_ERR(bh)) 53761c215028STheodore Ts'o return PTR_ERR(bh); 5377ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5378ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5379ac27a0ecSDave Kleikamp else 5380ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5381ac27a0ecSDave Kleikamp brelse(bh); 5382ac27a0ecSDave Kleikamp offset = 0; 5383ac27a0ecSDave Kleikamp toread -= tocopy; 5384ac27a0ecSDave Kleikamp data += tocopy; 5385ac27a0ecSDave Kleikamp blk++; 5386ac27a0ecSDave Kleikamp } 5387ac27a0ecSDave Kleikamp return len; 5388ac27a0ecSDave Kleikamp } 5389ac27a0ecSDave Kleikamp 5390ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5391ac27a0ecSDave Kleikamp * enough credits) */ 5392617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5393ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5394ac27a0ecSDave Kleikamp { 5395ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5396725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 53971c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5398ac27a0ecSDave Kleikamp struct buffer_head *bh; 5399ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5400ac27a0ecSDave Kleikamp 54010390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5402b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5403b31e1552SEric Sandeen " cancelled because transaction is not started", 54049c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 54059c3013e9SJan Kara return -EIO; 54069c3013e9SJan Kara } 540767eeb568SDmitry Monakhov /* 540867eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 540967eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 541067eeb568SDmitry Monakhov */ 541167eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 541267eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 541367eeb568SDmitry Monakhov " cancelled because not block aligned", 541467eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 541567eeb568SDmitry Monakhov return -EIO; 541667eeb568SDmitry Monakhov } 541767eeb568SDmitry Monakhov 54181c215028STheodore Ts'o bh = ext4_bread(handle, inode, blk, 1); 54191c215028STheodore Ts'o if (IS_ERR(bh)) 54201c215028STheodore Ts'o return PTR_ERR(bh); 5421ac27a0ecSDave Kleikamp if (!bh) 5422ac27a0ecSDave Kleikamp goto out; 54235d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5424617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5425ac27a0ecSDave Kleikamp if (err) { 5426ac27a0ecSDave Kleikamp brelse(bh); 54271c215028STheodore Ts'o return err; 5428ac27a0ecSDave Kleikamp } 5429ac27a0ecSDave Kleikamp lock_buffer(bh); 543067eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5431ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5432ac27a0ecSDave Kleikamp unlock_buffer(bh); 54330390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5434ac27a0ecSDave Kleikamp brelse(bh); 5435ac27a0ecSDave Kleikamp out: 543667eeb568SDmitry Monakhov if (inode->i_size < off + len) { 543767eeb568SDmitry Monakhov i_size_write(inode, off + len); 5438617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5439617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 544021f97697SJan Kara } 544167eeb568SDmitry Monakhov return len; 5442ac27a0ecSDave Kleikamp } 5443ac27a0ecSDave Kleikamp 5444ac27a0ecSDave Kleikamp #endif 5445ac27a0ecSDave Kleikamp 5446152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5447152a0836SAl Viro const char *dev_name, void *data) 5448ac27a0ecSDave Kleikamp { 5449152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5450ac27a0ecSDave Kleikamp } 5451ac27a0ecSDave Kleikamp 545237f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 545324b58424STheodore Ts'o static inline void register_as_ext2(void) 545424b58424STheodore Ts'o { 545524b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 545624b58424STheodore Ts'o if (err) 545724b58424STheodore Ts'o printk(KERN_WARNING 545824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 545924b58424STheodore Ts'o } 546024b58424STheodore Ts'o 546124b58424STheodore Ts'o static inline void unregister_as_ext2(void) 546224b58424STheodore Ts'o { 546324b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 546424b58424STheodore Ts'o } 54652035e776STheodore Ts'o 54662035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 54672035e776STheodore Ts'o { 54682035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 54692035e776STheodore Ts'o return 0; 54702035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54712035e776STheodore Ts'o return 1; 54722035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 54732035e776STheodore Ts'o return 0; 54742035e776STheodore Ts'o return 1; 54752035e776STheodore Ts'o } 547624b58424STheodore Ts'o #else 547724b58424STheodore Ts'o static inline void register_as_ext2(void) { } 547824b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 54792035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 548024b58424STheodore Ts'o #endif 548124b58424STheodore Ts'o 548237f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 548324b58424STheodore Ts'o static inline void register_as_ext3(void) 548424b58424STheodore Ts'o { 548524b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 548624b58424STheodore Ts'o if (err) 548724b58424STheodore Ts'o printk(KERN_WARNING 548824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 548924b58424STheodore Ts'o } 549024b58424STheodore Ts'o 549124b58424STheodore Ts'o static inline void unregister_as_ext3(void) 549224b58424STheodore Ts'o { 549324b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 549424b58424STheodore Ts'o } 54952035e776STheodore Ts'o 54962035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 54972035e776STheodore Ts'o { 54982035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 54992035e776STheodore Ts'o return 0; 55002035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 55012035e776STheodore Ts'o return 0; 55022035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 55032035e776STheodore Ts'o return 1; 55042035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 55052035e776STheodore Ts'o return 0; 55062035e776STheodore Ts'o return 1; 55072035e776STheodore Ts'o } 550824b58424STheodore Ts'o #else 550924b58424STheodore Ts'o static inline void register_as_ext3(void) { } 551024b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 55112035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 551224b58424STheodore Ts'o #endif 551324b58424STheodore Ts'o 551403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5515ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 551603010a33STheodore Ts'o .name = "ext4", 5517152a0836SAl Viro .mount = ext4_mount, 5518ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5519ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5520ac27a0ecSDave Kleikamp }; 55217f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5522ac27a0ecSDave Kleikamp 55238f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5524857ac889SLukas Czerner { 5525857ac889SLukas Czerner struct ext4_features *ef; 5526857ac889SLukas Czerner int ret = -ENOMEM; 5527857ac889SLukas Czerner 5528857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5529857ac889SLukas Czerner if (!ef) 5530857ac889SLukas Czerner goto out; 5531857ac889SLukas Czerner 5532857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5533857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5534857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5535857ac889SLukas Czerner "features"); 5536857ac889SLukas Czerner if (ret) { 5537857ac889SLukas Czerner kfree(ef); 5538857ac889SLukas Czerner goto out; 5539857ac889SLukas Czerner } 5540857ac889SLukas Czerner 5541857ac889SLukas Czerner ext4_feat = ef; 5542857ac889SLukas Czerner ret = 0; 5543857ac889SLukas Czerner out: 5544857ac889SLukas Czerner return ret; 5545857ac889SLukas Czerner } 5546857ac889SLukas Czerner 55478f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 55488f021222SLukas Czerner { 55498f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 55508f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 55518f021222SLukas Czerner kfree(ext4_feat); 55528f021222SLukas Czerner } 55538f021222SLukas Czerner 5554e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5555e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5556e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5557e9e3bcecSEric Sandeen 55585dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5559ac27a0ecSDave Kleikamp { 5560e9e3bcecSEric Sandeen int i, err; 5561c9de560dSAlex Tomas 556207c0c5d8SAl Viro ext4_li_info = NULL; 556307c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 556407c0c5d8SAl Viro 55659a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 556612e9b892SDmitry Monakhov ext4_check_flag_values(); 5567e9e3bcecSEric Sandeen 5568e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5569e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5570e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5571e9e3bcecSEric Sandeen } 5572e9e3bcecSEric Sandeen 557351865fdaSZheng Liu err = ext4_init_es(); 55746fd058f7STheodore Ts'o if (err) 55756fd058f7STheodore Ts'o return err; 557651865fdaSZheng Liu 557751865fdaSZheng Liu err = ext4_init_pageio(); 557851865fdaSZheng Liu if (err) 557951865fdaSZheng Liu goto out7; 558051865fdaSZheng Liu 55815dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5582bd2d0210STheodore Ts'o if (err) 5583d44651d0SFabrice Jouhaud goto out6; 55843197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 55850e376b1eSTheodore Ts'o if (!ext4_kset) { 55860e376b1eSTheodore Ts'o err = -ENOMEM; 5587dd68314cSTheodore Ts'o goto out5; 55880e376b1eSTheodore Ts'o } 5589d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5590857ac889SLukas Czerner 5591857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5592dd68314cSTheodore Ts'o if (err) 5593dd68314cSTheodore Ts'o goto out4; 5594857ac889SLukas Czerner 55955dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5596ac27a0ecSDave Kleikamp if (err) 5597c9de560dSAlex Tomas goto out2; 55989c191f70ST Makphaibulchoke else 55999c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5600ac27a0ecSDave Kleikamp err = init_inodecache(); 5601ac27a0ecSDave Kleikamp if (err) 5602ac27a0ecSDave Kleikamp goto out1; 560324b58424STheodore Ts'o register_as_ext3(); 56042035e776STheodore Ts'o register_as_ext2(); 560503010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5606ac27a0ecSDave Kleikamp if (err) 5607ac27a0ecSDave Kleikamp goto out; 5608bfff6873SLukas Czerner 5609ac27a0ecSDave Kleikamp return 0; 5610ac27a0ecSDave Kleikamp out: 561124b58424STheodore Ts'o unregister_as_ext2(); 561224b58424STheodore Ts'o unregister_as_ext3(); 5613ac27a0ecSDave Kleikamp destroy_inodecache(); 5614ac27a0ecSDave Kleikamp out1: 56159c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 56165dabfc78STheodore Ts'o ext4_exit_mballoc(); 56179c191f70ST Makphaibulchoke out2: 56188f021222SLukas Czerner ext4_exit_feat_adverts(); 56196fd058f7STheodore Ts'o out4: 5620d44651d0SFabrice Jouhaud if (ext4_proc_root) 5621dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5622dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5623d44651d0SFabrice Jouhaud out5: 5624dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5625d44651d0SFabrice Jouhaud out6: 56265dabfc78STheodore Ts'o ext4_exit_pageio(); 562751865fdaSZheng Liu out7: 562851865fdaSZheng Liu ext4_exit_es(); 562951865fdaSZheng Liu 5630ac27a0ecSDave Kleikamp return err; 5631ac27a0ecSDave Kleikamp } 5632ac27a0ecSDave Kleikamp 56335dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5634ac27a0ecSDave Kleikamp { 5635bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 563624b58424STheodore Ts'o unregister_as_ext2(); 563724b58424STheodore Ts'o unregister_as_ext3(); 563803010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5639ac27a0ecSDave Kleikamp destroy_inodecache(); 56405dabfc78STheodore Ts'o ext4_exit_mballoc(); 56418f021222SLukas Czerner ext4_exit_feat_adverts(); 56429f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 56433197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 56445dabfc78STheodore Ts'o ext4_exit_system_zone(); 56455dabfc78STheodore Ts'o ext4_exit_pageio(); 5646dd12ed14SEric Sandeen ext4_exit_es(); 5647ac27a0ecSDave Kleikamp } 5648ac27a0ecSDave Kleikamp 5649ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 565083982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5651ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 56525dabfc78STheodore Ts'o module_init(ext4_init_fs) 56535dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5654