1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 417abc52c2SDan Magenheimer #include <linux/cleancache.h> 42ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 43ac27a0ecSDave Kleikamp 44bfff6873SLukas Czerner #include <linux/kthread.h> 45bfff6873SLukas Czerner #include <linux/freezer.h> 46bfff6873SLukas Czerner 473dcf5451SChristoph Hellwig #include "ext4.h" 484a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 493dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 50ac27a0ecSDave Kleikamp #include "xattr.h" 51ac27a0ecSDave Kleikamp #include "acl.h" 523661d286STheodore Ts'o #include "mballoc.h" 53ac27a0ecSDave Kleikamp 549bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 559bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 569bffad1eSTheodore Ts'o 571f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 583197ebdbSTheodore Ts'o static struct kset *ext4_kset; 590b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 600b75a840SLukas Czerner static struct mutex ext4_li_mtx; 610b75a840SLukas Czerner static struct ext4_features *ext4_feat; 629c191f70ST Makphaibulchoke static int ext4_mballoc_ready; 639f6200bbSTheodore Ts'o 64617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 65ac27a0ecSDave Kleikamp unsigned long journal_devnum); 662adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 67e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 68617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 69617ba13bSMingming Cao struct ext4_super_block *es); 70617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 71617ba13bSMingming Cao struct ext4_super_block *es); 72617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 73617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 74617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 75c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 76c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 77152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 78152a0836SAl Viro const char *dev_name, void *data); 792035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 802035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 81d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 82bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 83bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 848f1f7453SEric Sandeen static void ext4_clear_request_list(void); 8527dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *, ext4_fsblk_t); 86ac27a0ecSDave Kleikamp 872035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 882035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 892035e776STheodore Ts'o .owner = THIS_MODULE, 902035e776STheodore Ts'o .name = "ext2", 912035e776STheodore Ts'o .mount = ext4_mount, 922035e776STheodore Ts'o .kill_sb = kill_block_super, 932035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 942035e776STheodore Ts'o }; 957f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 96fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 972035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 982035e776STheodore Ts'o #else 992035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1002035e776STheodore Ts'o #endif 1012035e776STheodore Ts'o 1022035e776STheodore Ts'o 103ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 104ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 105ba69f9abSJan Kara .owner = THIS_MODULE, 106ba69f9abSJan Kara .name = "ext3", 107152a0836SAl Viro .mount = ext4_mount, 108ba69f9abSJan Kara .kill_sb = kill_block_super, 109ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 110ba69f9abSJan Kara }; 1117f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 112fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 113ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 114ba69f9abSJan Kara #else 115ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 116ba69f9abSJan Kara #endif 117bd81d8eeSLaurent Vivier 118d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 119d25425f8SDarrick J. Wong struct ext4_super_block *es) 120d25425f8SDarrick J. Wong { 121d25425f8SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 122d25425f8SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 123d25425f8SDarrick J. Wong return 1; 124d25425f8SDarrick J. Wong 125d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 126d25425f8SDarrick J. Wong } 127d25425f8SDarrick J. Wong 128a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 129a9c47317SDarrick J. Wong struct ext4_super_block *es) 130a9c47317SDarrick J. Wong { 131a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 132a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 133a9c47317SDarrick J. Wong __u32 csum; 134a9c47317SDarrick J. Wong 135a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 136a9c47317SDarrick J. Wong 137a9c47317SDarrick J. Wong return cpu_to_le32(csum); 138a9c47317SDarrick J. Wong } 139a9c47317SDarrick J. Wong 140c197855eSStephen Hemminger static int ext4_superblock_csum_verify(struct super_block *sb, 141a9c47317SDarrick J. Wong struct ext4_super_block *es) 142a9c47317SDarrick J. Wong { 1439aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 144a9c47317SDarrick J. Wong return 1; 145a9c47317SDarrick J. Wong 146a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 147a9c47317SDarrick J. Wong } 148a9c47317SDarrick J. Wong 14906db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 150a9c47317SDarrick J. Wong { 15106db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 15206db49e6STheodore Ts'o 1539aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 154a9c47317SDarrick J. Wong return; 155a9c47317SDarrick J. Wong 156a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 157a9c47317SDarrick J. Wong } 158a9c47317SDarrick J. Wong 1599933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1609933fc0aSTheodore Ts'o { 1619933fc0aSTheodore Ts'o void *ret; 1629933fc0aSTheodore Ts'o 1638be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1649933fc0aSTheodore Ts'o if (!ret) 1659933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1669933fc0aSTheodore Ts'o return ret; 1679933fc0aSTheodore Ts'o } 1689933fc0aSTheodore Ts'o 1699933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1709933fc0aSTheodore Ts'o { 1719933fc0aSTheodore Ts'o void *ret; 1729933fc0aSTheodore Ts'o 1738be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1749933fc0aSTheodore Ts'o if (!ret) 1759933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1769933fc0aSTheodore Ts'o return ret; 1779933fc0aSTheodore Ts'o } 1789933fc0aSTheodore Ts'o 1799933fc0aSTheodore Ts'o void ext4_kvfree(void *ptr) 1809933fc0aSTheodore Ts'o { 1819933fc0aSTheodore Ts'o if (is_vmalloc_addr(ptr)) 1829933fc0aSTheodore Ts'o vfree(ptr); 1839933fc0aSTheodore Ts'o else 1849933fc0aSTheodore Ts'o kfree(ptr); 1859933fc0aSTheodore Ts'o 1869933fc0aSTheodore Ts'o } 1879933fc0aSTheodore Ts'o 1888fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1898fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 190bd81d8eeSLaurent Vivier { 1913a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1928fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1938fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 194bd81d8eeSLaurent Vivier } 195bd81d8eeSLaurent Vivier 1968fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1978fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 198bd81d8eeSLaurent Vivier { 1995272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 2008fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2018fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 202bd81d8eeSLaurent Vivier } 203bd81d8eeSLaurent Vivier 2048fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2058fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 206bd81d8eeSLaurent Vivier { 2075272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2088fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2098fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 210bd81d8eeSLaurent Vivier } 211bd81d8eeSLaurent Vivier 212021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 213560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 214560671a0SAneesh Kumar K.V { 215560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 216560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 217560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 218560671a0SAneesh Kumar K.V } 219560671a0SAneesh Kumar K.V 220560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 221560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 222560671a0SAneesh Kumar K.V { 223560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 224560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 225560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 226560671a0SAneesh Kumar K.V } 227560671a0SAneesh Kumar K.V 228560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 229560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 230560671a0SAneesh Kumar K.V { 231560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 232560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 233560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 234560671a0SAneesh Kumar K.V } 235560671a0SAneesh Kumar K.V 236560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 237560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 238560671a0SAneesh Kumar K.V { 239560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 240560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 241560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 242560671a0SAneesh Kumar K.V } 243560671a0SAneesh Kumar K.V 2448fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2458fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 246bd81d8eeSLaurent Vivier { 2473a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2488fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2498fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 250bd81d8eeSLaurent Vivier } 251bd81d8eeSLaurent Vivier 2528fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2538fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 254bd81d8eeSLaurent Vivier { 2555272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2568fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2578fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 258bd81d8eeSLaurent Vivier } 259bd81d8eeSLaurent Vivier 2608fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2618fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 262bd81d8eeSLaurent Vivier { 2635272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2648fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2658fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 266bd81d8eeSLaurent Vivier } 267bd81d8eeSLaurent Vivier 268021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 269560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 270560671a0SAneesh Kumar K.V { 271560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 272560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 273560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 274560671a0SAneesh Kumar K.V } 275560671a0SAneesh Kumar K.V 276560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 277560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 278560671a0SAneesh Kumar K.V { 279560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 280560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 281560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 282560671a0SAneesh Kumar K.V } 283560671a0SAneesh Kumar K.V 284560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 285560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 286560671a0SAneesh Kumar K.V { 287560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 288560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 289560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 290560671a0SAneesh Kumar K.V } 291560671a0SAneesh Kumar K.V 292560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 293560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 294560671a0SAneesh Kumar K.V { 295560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 296560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 297560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 298560671a0SAneesh Kumar K.V } 299560671a0SAneesh Kumar K.V 300d3d1faf6SCurt Wohlgemuth 3011c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3021c13d5c0STheodore Ts'o unsigned int line) 3031c13d5c0STheodore Ts'o { 3041c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3051c13d5c0STheodore Ts'o 3061c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3071c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3081c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3091c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3101c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3111c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3121c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3131c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3141c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3151c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3161c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3171c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3181c13d5c0STheodore Ts'o } 31966e61a9eSTheodore Ts'o /* 32066e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 32166e61a9eSTheodore Ts'o * started already 32266e61a9eSTheodore Ts'o */ 32366e61a9eSTheodore Ts'o if (!es->s_error_count) 32466e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 325ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3261c13d5c0STheodore Ts'o } 3271c13d5c0STheodore Ts'o 3281c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3291c13d5c0STheodore Ts'o unsigned int line) 3301c13d5c0STheodore Ts'o { 3311c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3321c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3331c13d5c0STheodore Ts'o } 3341c13d5c0STheodore Ts'o 3357c2e7087STheodore Ts'o /* 3367c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 3377c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 3387c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 3397c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 3407c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 3417c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 3427c2e7087STheodore Ts'o */ 3437c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 3447c2e7087STheodore Ts'o { 3457c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 3467c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 3477c2e7087STheodore Ts'o 3487c2e7087STheodore Ts'o return bdi->dev == NULL; 3497c2e7087STheodore Ts'o } 3507c2e7087STheodore Ts'o 35118aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 35218aadd47SBobi Jam { 35318aadd47SBobi Jam struct super_block *sb = journal->j_private; 35418aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 35518aadd47SBobi Jam int error = is_journal_aborted(journal); 3565d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 35718aadd47SBobi Jam 3585d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 35918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3605d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3615d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3625d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 36318aadd47SBobi Jam list_del_init(&jce->jce_list); 36418aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 36518aadd47SBobi Jam jce->jce_func(sb, jce, error); 36618aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 36718aadd47SBobi Jam } 36818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 36918aadd47SBobi Jam } 3701c13d5c0STheodore Ts'o 371ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 372ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 373ac27a0ecSDave Kleikamp * 374ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 375617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 376ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 377ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 378ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 379ac27a0ecSDave Kleikamp * write out the superblock safely. 380ac27a0ecSDave Kleikamp * 381dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 382d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 383ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 384ac27a0ecSDave Kleikamp */ 385ac27a0ecSDave Kleikamp 386617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 387ac27a0ecSDave Kleikamp { 388ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 389ac27a0ecSDave Kleikamp return; 390ac27a0ecSDave Kleikamp 391ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 392617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 393ac27a0ecSDave Kleikamp 3944ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 395ac27a0ecSDave Kleikamp if (journal) 396dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 397ac27a0ecSDave Kleikamp } 398ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 399b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4004418e141SDmitry Monakhov /* 4014418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4024418e141SDmitry Monakhov * before ->s_flags update 4034418e141SDmitry Monakhov */ 4044418e141SDmitry Monakhov smp_wmb(); 405ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 406ac27a0ecSDave Kleikamp } 407ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 408617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 409ac27a0ecSDave Kleikamp sb->s_id); 410ac27a0ecSDave Kleikamp } 411ac27a0ecSDave Kleikamp 412efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 413efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 414efbed4dcSTheodore Ts'o "EXT4-fs error") 415efbed4dcSTheodore Ts'o 41612062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 417c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 418ac27a0ecSDave Kleikamp { 4190ff2ea7dSJoe Perches struct va_format vaf; 420ac27a0ecSDave Kleikamp va_list args; 421ac27a0ecSDave Kleikamp 422efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 423ac27a0ecSDave Kleikamp va_start(args, fmt); 4240ff2ea7dSJoe Perches vaf.fmt = fmt; 4250ff2ea7dSJoe Perches vaf.va = &args; 426efbed4dcSTheodore Ts'o printk(KERN_CRIT 427efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4280ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 429ac27a0ecSDave Kleikamp va_end(args); 430efbed4dcSTheodore Ts'o } 431f3fc0210STheodore Ts'o save_error_info(sb, function, line); 432617ba13bSMingming Cao ext4_handle_error(sb); 433ac27a0ecSDave Kleikamp } 434ac27a0ecSDave Kleikamp 435e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 436c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 437273df556SFrank Mayhar const char *fmt, ...) 438273df556SFrank Mayhar { 439273df556SFrank Mayhar va_list args; 440f7c21177STheodore Ts'o struct va_format vaf; 4411c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 442273df556SFrank Mayhar 4431c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4441c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 445efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 446273df556SFrank Mayhar va_start(args, fmt); 447f7c21177STheodore Ts'o vaf.fmt = fmt; 448f7c21177STheodore Ts'o vaf.va = &args; 449c398eda0STheodore Ts'o if (block) 450d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 451d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 452d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 453d9ee81daSJoe Perches block, current->comm, &vaf); 454d9ee81daSJoe Perches else 455d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 456d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 457d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 458d9ee81daSJoe Perches current->comm, &vaf); 459273df556SFrank Mayhar va_end(args); 460efbed4dcSTheodore Ts'o } 461efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 462273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 463273df556SFrank Mayhar } 464273df556SFrank Mayhar 465e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 466f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 467f7c21177STheodore Ts'o const char *fmt, ...) 468273df556SFrank Mayhar { 469273df556SFrank Mayhar va_list args; 470f7c21177STheodore Ts'o struct va_format vaf; 4711c13d5c0STheodore Ts'o struct ext4_super_block *es; 472496ad9aaSAl Viro struct inode *inode = file_inode(file); 473273df556SFrank Mayhar char pathname[80], *path; 474273df556SFrank Mayhar 4751c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4761c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 477efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 478273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 479f9a62d09SDan Carpenter if (IS_ERR(path)) 480273df556SFrank Mayhar path = "(unknown)"; 481f7c21177STheodore Ts'o va_start(args, fmt); 482f7c21177STheodore Ts'o vaf.fmt = fmt; 483f7c21177STheodore Ts'o vaf.va = &args; 484d9ee81daSJoe Perches if (block) 485d9ee81daSJoe Perches printk(KERN_CRIT 486d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 487d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 488d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 489d9ee81daSJoe Perches block, current->comm, path, &vaf); 490d9ee81daSJoe Perches else 491d9ee81daSJoe Perches printk(KERN_CRIT 492d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 493d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 494d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 495d9ee81daSJoe Perches current->comm, path, &vaf); 496273df556SFrank Mayhar va_end(args); 497efbed4dcSTheodore Ts'o } 498efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 499273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 500273df556SFrank Mayhar } 501273df556SFrank Mayhar 502722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 503ac27a0ecSDave Kleikamp char nbuf[16]) 504ac27a0ecSDave Kleikamp { 505ac27a0ecSDave Kleikamp char *errstr = NULL; 506ac27a0ecSDave Kleikamp 507ac27a0ecSDave Kleikamp switch (errno) { 508ac27a0ecSDave Kleikamp case -EIO: 509ac27a0ecSDave Kleikamp errstr = "IO failure"; 510ac27a0ecSDave Kleikamp break; 511ac27a0ecSDave Kleikamp case -ENOMEM: 512ac27a0ecSDave Kleikamp errstr = "Out of memory"; 513ac27a0ecSDave Kleikamp break; 514ac27a0ecSDave Kleikamp case -EROFS: 51578f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 51678f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 517ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 518ac27a0ecSDave Kleikamp else 519ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 520ac27a0ecSDave Kleikamp break; 521ac27a0ecSDave Kleikamp default: 522ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 523ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 524ac27a0ecSDave Kleikamp * NULL. */ 525ac27a0ecSDave Kleikamp if (nbuf) { 526ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 527ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 528ac27a0ecSDave Kleikamp errstr = nbuf; 529ac27a0ecSDave Kleikamp } 530ac27a0ecSDave Kleikamp break; 531ac27a0ecSDave Kleikamp } 532ac27a0ecSDave Kleikamp 533ac27a0ecSDave Kleikamp return errstr; 534ac27a0ecSDave Kleikamp } 535ac27a0ecSDave Kleikamp 536617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 537ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 538ac27a0ecSDave Kleikamp 539c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 540c398eda0STheodore Ts'o unsigned int line, int errno) 541ac27a0ecSDave Kleikamp { 542ac27a0ecSDave Kleikamp char nbuf[16]; 543ac27a0ecSDave Kleikamp const char *errstr; 544ac27a0ecSDave Kleikamp 545ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 546ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 547ac27a0ecSDave Kleikamp * an error. */ 548ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 549ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 550ac27a0ecSDave Kleikamp return; 551ac27a0ecSDave Kleikamp 552efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 553617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 554c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 555c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 556efbed4dcSTheodore Ts'o } 557ac27a0ecSDave Kleikamp 558efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 559617ba13bSMingming Cao ext4_handle_error(sb); 560ac27a0ecSDave Kleikamp } 561ac27a0ecSDave Kleikamp 562ac27a0ecSDave Kleikamp /* 563617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 564ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 565ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 566ac27a0ecSDave Kleikamp * 567ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 568ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 569ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 570ac27a0ecSDave Kleikamp */ 571ac27a0ecSDave Kleikamp 572c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 573c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 574ac27a0ecSDave Kleikamp { 575ac27a0ecSDave Kleikamp va_list args; 576ac27a0ecSDave Kleikamp 5771c13d5c0STheodore Ts'o save_error_info(sb, function, line); 578ac27a0ecSDave Kleikamp va_start(args, fmt); 579c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 580c398eda0STheodore Ts'o function, line); 581ac27a0ecSDave Kleikamp vprintk(fmt, args); 582ac27a0ecSDave Kleikamp printk("\n"); 583ac27a0ecSDave Kleikamp va_end(args); 584ac27a0ecSDave Kleikamp 5851c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 586b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 5874ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 5884418e141SDmitry Monakhov /* 5894418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 5904418e141SDmitry Monakhov * before ->s_flags update 5914418e141SDmitry Monakhov */ 5924418e141SDmitry Monakhov smp_wmb(); 5934418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 594ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 595dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5961c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5971c13d5c0STheodore Ts'o } 5981c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5991c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 600ac27a0ecSDave Kleikamp } 601ac27a0ecSDave Kleikamp 602e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 603e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 604b31e1552SEric Sandeen { 6050ff2ea7dSJoe Perches struct va_format vaf; 606b31e1552SEric Sandeen va_list args; 607b31e1552SEric Sandeen 608efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 609efbed4dcSTheodore Ts'o return; 610efbed4dcSTheodore Ts'o 611b31e1552SEric Sandeen va_start(args, fmt); 6120ff2ea7dSJoe Perches vaf.fmt = fmt; 6130ff2ea7dSJoe Perches vaf.va = &args; 6140ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 615b31e1552SEric Sandeen va_end(args); 616b31e1552SEric Sandeen } 617b31e1552SEric Sandeen 61812062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 619c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 620ac27a0ecSDave Kleikamp { 6210ff2ea7dSJoe Perches struct va_format vaf; 622ac27a0ecSDave Kleikamp va_list args; 623ac27a0ecSDave Kleikamp 624efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 625efbed4dcSTheodore Ts'o "EXT4-fs warning")) 626efbed4dcSTheodore Ts'o return; 627efbed4dcSTheodore Ts'o 628ac27a0ecSDave Kleikamp va_start(args, fmt); 6290ff2ea7dSJoe Perches vaf.fmt = fmt; 6300ff2ea7dSJoe Perches vaf.va = &args; 6310ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6320ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 633ac27a0ecSDave Kleikamp va_end(args); 634ac27a0ecSDave Kleikamp } 635ac27a0ecSDave Kleikamp 636e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 637e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 638e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 639e29136f8STheodore Ts'o const char *fmt, ...) 6405d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6415d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6425d1b1b3fSAneesh Kumar K.V { 6430ff2ea7dSJoe Perches struct va_format vaf; 6445d1b1b3fSAneesh Kumar K.V va_list args; 6455d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6465d1b1b3fSAneesh Kumar K.V 6471c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6481c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6491c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6500ff2ea7dSJoe Perches 651efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 6525d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6530ff2ea7dSJoe Perches vaf.fmt = fmt; 6540ff2ea7dSJoe Perches vaf.va = &args; 65521149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 656e29136f8STheodore Ts'o sb->s_id, function, line, grp); 657e29136f8STheodore Ts'o if (ino) 6580ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 659e29136f8STheodore Ts'o if (block) 660efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 661efbed4dcSTheodore Ts'o (unsigned long long) block); 6620ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6635d1b1b3fSAneesh Kumar K.V va_end(args); 664efbed4dcSTheodore Ts'o } 6655d1b1b3fSAneesh Kumar K.V 6665d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 667e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6685d1b1b3fSAneesh Kumar K.V return; 6695d1b1b3fSAneesh Kumar K.V } 6701c13d5c0STheodore Ts'o 6715d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6725d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6735d1b1b3fSAneesh Kumar K.V /* 6745d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6755d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6765d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6775d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6785d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 67925985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 6805d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6815d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6825d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6835d1b1b3fSAneesh Kumar K.V */ 6845d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6855d1b1b3fSAneesh Kumar K.V return; 6865d1b1b3fSAneesh Kumar K.V } 6875d1b1b3fSAneesh Kumar K.V 688617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 689ac27a0ecSDave Kleikamp { 690617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 691ac27a0ecSDave Kleikamp 692617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 693ac27a0ecSDave Kleikamp return; 694ac27a0ecSDave Kleikamp 69512062dddSEric Sandeen ext4_warning(sb, 696ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 697ac27a0ecSDave Kleikamp "running e2fsck is recommended", 698617ba13bSMingming Cao EXT4_DYNAMIC_REV); 699ac27a0ecSDave Kleikamp 700617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 701617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 702617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 703ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 704ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 705ac27a0ecSDave Kleikamp 706ac27a0ecSDave Kleikamp /* 707ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 708ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 709ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 710ac27a0ecSDave Kleikamp */ 711ac27a0ecSDave Kleikamp } 712ac27a0ecSDave Kleikamp 713ac27a0ecSDave Kleikamp /* 714ac27a0ecSDave Kleikamp * Open the external journal device 715ac27a0ecSDave Kleikamp */ 716b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 717ac27a0ecSDave Kleikamp { 718ac27a0ecSDave Kleikamp struct block_device *bdev; 719ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 720ac27a0ecSDave Kleikamp 721d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 722ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 723ac27a0ecSDave Kleikamp goto fail; 724ac27a0ecSDave Kleikamp return bdev; 725ac27a0ecSDave Kleikamp 726ac27a0ecSDave Kleikamp fail: 727b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 728ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 729ac27a0ecSDave Kleikamp return NULL; 730ac27a0ecSDave Kleikamp } 731ac27a0ecSDave Kleikamp 732ac27a0ecSDave Kleikamp /* 733ac27a0ecSDave Kleikamp * Release the journal device 734ac27a0ecSDave Kleikamp */ 7354385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 736ac27a0ecSDave Kleikamp { 7374385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 738ac27a0ecSDave Kleikamp } 739ac27a0ecSDave Kleikamp 7404385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 741ac27a0ecSDave Kleikamp { 742ac27a0ecSDave Kleikamp struct block_device *bdev; 743ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 744ac27a0ecSDave Kleikamp if (bdev) { 7454385bab1SAl Viro ext4_blkdev_put(bdev); 746ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 747ac27a0ecSDave Kleikamp } 748ac27a0ecSDave Kleikamp } 749ac27a0ecSDave Kleikamp 750ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 751ac27a0ecSDave Kleikamp { 752617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 753ac27a0ecSDave Kleikamp } 754ac27a0ecSDave Kleikamp 755617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 756ac27a0ecSDave Kleikamp { 757ac27a0ecSDave Kleikamp struct list_head *l; 758ac27a0ecSDave Kleikamp 759b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 760ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 761ac27a0ecSDave Kleikamp 762ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 763ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 764ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 765ac27a0ecSDave Kleikamp printk(KERN_ERR " " 766ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 767ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 768ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 769ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 770ac27a0ecSDave Kleikamp } 771ac27a0ecSDave Kleikamp } 772ac27a0ecSDave Kleikamp 773617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 774ac27a0ecSDave Kleikamp { 775617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 776617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 777ef2cabf7SHidehiro Kawai int i, err; 778ac27a0ecSDave Kleikamp 779857ac889SLukas Czerner ext4_unregister_li_request(sb); 780e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 781e0ccfd95SChristoph Hellwig 7822e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 7832e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 7844c0425ffSMingming Cao 7850390131bSFrank Mayhar if (sbi->s_journal) { 786ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 78747b4a50bSJan Kara sbi->s_journal = NULL; 788ef2cabf7SHidehiro Kawai if (err < 0) 789c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7900390131bSFrank Mayhar } 791d4edac31SJosef Bacik 792d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 7939105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 794d4edac31SJosef Bacik ext4_release_system_zone(sb); 795d4edac31SJosef Bacik ext4_mb_release(sb); 796d4edac31SJosef Bacik ext4_ext_release(sb); 797d4edac31SJosef Bacik ext4_xattr_put_super(sb); 798d4edac31SJosef Bacik 799ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 800617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 801ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 802ac27a0ecSDave Kleikamp } 80358c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 804a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 805a8e25a83SArtem Bityutskiy 806240799cdSTheodore Ts'o if (sbi->s_proc) { 80766acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 8089f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 809240799cdSTheodore Ts'o } 8103197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 811ac27a0ecSDave Kleikamp 812ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 813ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 814f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 8159933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 81657042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 817ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 818ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 81957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 820ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 821ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 822a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 823ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 824ac27a0ecSDave Kleikamp #endif 825ac27a0ecSDave Kleikamp 826ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 827ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 828ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 829ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 830ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 831ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 832ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 833ac27a0ecSDave Kleikamp 834f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 835ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 836ac27a0ecSDave Kleikamp /* 837ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 838ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 839ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 840ac27a0ecSDave Kleikamp */ 841ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 842f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 843617ba13bSMingming Cao ext4_blkdev_remove(sbi); 844ac27a0ecSDave Kleikamp } 8459c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 8469c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 8479c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 8489c191f70ST Makphaibulchoke } 849c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 850c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 851ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8523197ebdbSTheodore Ts'o /* 8533197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8543197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8553197ebdbSTheodore Ts'o */ 8563197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8573197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 8580441984aSDarrick J. Wong if (sbi->s_chksum_driver) 8590441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 860705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 861ac27a0ecSDave Kleikamp kfree(sbi); 862ac27a0ecSDave Kleikamp } 863ac27a0ecSDave Kleikamp 864e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 865ac27a0ecSDave Kleikamp 866ac27a0ecSDave Kleikamp /* 867ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 868ac27a0ecSDave Kleikamp */ 869617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 870ac27a0ecSDave Kleikamp { 871617ba13bSMingming Cao struct ext4_inode_info *ei; 872ac27a0ecSDave Kleikamp 873e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 874ac27a0ecSDave Kleikamp if (!ei) 875ac27a0ecSDave Kleikamp return NULL; 8760b8e58a1SAndreas Dilger 877ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 878202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 879c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 880c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8819a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 8829a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 88374cd15cdSZheng Liu INIT_LIST_HEAD(&ei->i_es_lru); 884eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 88574cd15cdSZheng Liu ei->i_es_lru_nr = 0; 886d3922a77SZheng Liu ei->i_touch_when = 0; 887d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 888d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 889d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8909d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 8917e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 892d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 893a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 894a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 895*96c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 896a9e7f447SDmitry Monakhov #endif 8978aefcd55STheodore Ts'o ei->jinode = NULL; 8982e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 899744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 900b436b9beSJan Kara ei->i_sync_tid = 0; 901b436b9beSJan Kara ei->i_datasync_tid = 0; 902f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 903e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9042e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 9050b8e58a1SAndreas Dilger 906ac27a0ecSDave Kleikamp return &ei->vfs_inode; 907ac27a0ecSDave Kleikamp } 908ac27a0ecSDave Kleikamp 9097ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9107ff9c073STheodore Ts'o { 9117ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9127ff9c073STheodore Ts'o 9137ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9147ff9c073STheodore Ts'o return drop; 9157ff9c073STheodore Ts'o } 9167ff9c073STheodore Ts'o 917fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 918fa0d7e3dSNick Piggin { 919fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 920fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 921fa0d7e3dSNick Piggin } 922fa0d7e3dSNick Piggin 923617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 924ac27a0ecSDave Kleikamp { 9259f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 926b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 927b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 928b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9299f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9309f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9319f7dd93dSVasily Averin true); 9329f7dd93dSVasily Averin dump_stack(); 9339f7dd93dSVasily Averin } 934fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 935ac27a0ecSDave Kleikamp } 936ac27a0ecSDave Kleikamp 93751cc5068SAlexey Dobriyan static void init_once(void *foo) 938ac27a0ecSDave Kleikamp { 939617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 940ac27a0ecSDave Kleikamp 941ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 942ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9430e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 944ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 945ac27a0ecSDave Kleikamp } 946ac27a0ecSDave Kleikamp 947e67bc2b3SFabian Frederick static int __init init_inodecache(void) 948ac27a0ecSDave Kleikamp { 949617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 950617ba13bSMingming Cao sizeof(struct ext4_inode_info), 951ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 952ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 95320c2df83SPaul Mundt init_once); 954617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 955ac27a0ecSDave Kleikamp return -ENOMEM; 956ac27a0ecSDave Kleikamp return 0; 957ac27a0ecSDave Kleikamp } 958ac27a0ecSDave Kleikamp 959ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 960ac27a0ecSDave Kleikamp { 9618c0a8537SKirill A. Shutemov /* 9628c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 9638c0a8537SKirill A. Shutemov * destroy cache. 9648c0a8537SKirill A. Shutemov */ 9658c0a8537SKirill A. Shutemov rcu_barrier(); 966617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 967ac27a0ecSDave Kleikamp } 968ac27a0ecSDave Kleikamp 9690930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 970ac27a0ecSDave Kleikamp { 9710930fcc1SAl Viro invalidate_inode_buffers(inode); 972dbd5768fSJan Kara clear_inode(inode); 9739f754758SChristoph Hellwig dquot_drop(inode); 974c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 97551865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 97674cd15cdSZheng Liu ext4_es_lru_del(inode); 9778aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9788aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9798aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9808aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9818aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9828aefcd55STheodore Ts'o } 983ac27a0ecSDave Kleikamp } 984ac27a0ecSDave Kleikamp 9851b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9861b961ac0SChristoph Hellwig u64 ino, u32 generation) 987ac27a0ecSDave Kleikamp { 988ac27a0ecSDave Kleikamp struct inode *inode; 989ac27a0ecSDave Kleikamp 990617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 991ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 992617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 993ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 994ac27a0ecSDave Kleikamp 995ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 996ac27a0ecSDave Kleikamp * 997617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 998ac27a0ecSDave Kleikamp * deleted, so we should be safe. 999ac27a0ecSDave Kleikamp * 1000ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1001ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1002ac27a0ecSDave Kleikamp */ 1003f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 10041d1fe1eeSDavid Howells if (IS_ERR(inode)) 10051d1fe1eeSDavid Howells return ERR_CAST(inode); 10061d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1007ac27a0ecSDave Kleikamp iput(inode); 1008ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1009ac27a0ecSDave Kleikamp } 10101b961ac0SChristoph Hellwig 10111b961ac0SChristoph Hellwig return inode; 1012ac27a0ecSDave Kleikamp } 10131b961ac0SChristoph Hellwig 10141b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10151b961ac0SChristoph Hellwig int fh_len, int fh_type) 10161b961ac0SChristoph Hellwig { 10171b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10181b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10191b961ac0SChristoph Hellwig } 10201b961ac0SChristoph Hellwig 10211b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10221b961ac0SChristoph Hellwig int fh_len, int fh_type) 10231b961ac0SChristoph Hellwig { 10241b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10251b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1026ac27a0ecSDave Kleikamp } 1027ac27a0ecSDave Kleikamp 1028c39a7f84SToshiyuki Okajima /* 1029c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1030c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1031c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1032c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1033c39a7f84SToshiyuki Okajima */ 10340b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10350b8e58a1SAndreas Dilger gfp_t wait) 1036c39a7f84SToshiyuki Okajima { 1037c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1038c39a7f84SToshiyuki Okajima 1039c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1040c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1041c39a7f84SToshiyuki Okajima return 0; 1042c39a7f84SToshiyuki Okajima if (journal) 1043c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1044c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1045c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1046c39a7f84SToshiyuki Okajima } 1047c39a7f84SToshiyuki Okajima 1048ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1049ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1050ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1051ac27a0ecSDave Kleikamp 1052617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1053617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1054617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1055617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1056617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10576f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1058f00c9e44SJan Kara struct path *path); 10597c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 10607c319d32SAditya Kali int format_id); 1061ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 10627c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type); 1063617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1064617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1065ac27a0ecSDave Kleikamp size_t len, loff_t off); 1066617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1067ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 10687c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 10697c319d32SAditya Kali unsigned int flags); 10707c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1071ac27a0ecSDave Kleikamp 1072*96c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 1073*96c7e0d9SJan Kara { 1074*96c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 1075*96c7e0d9SJan Kara } 1076*96c7e0d9SJan Kara 107761e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 107860e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1079617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1080617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1081617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1082617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1083a5b5ee32SJan Kara .write_info = ext4_write_info, 1084a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1085a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1086ac27a0ecSDave Kleikamp }; 1087ac27a0ecSDave Kleikamp 10880d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1089617ba13bSMingming Cao .quota_on = ext4_quota_on, 1090ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1091287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1092287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1093287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1094287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1095287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1096ac27a0ecSDave Kleikamp }; 10977c319d32SAditya Kali 10987c319d32SAditya Kali static const struct quotactl_ops ext4_qctl_sysfile_operations = { 10997c319d32SAditya Kali .quota_on_meta = ext4_quota_on_sysfile, 11007c319d32SAditya Kali .quota_off = ext4_quota_off_sysfile, 11017c319d32SAditya Kali .quota_sync = dquot_quota_sync, 11027c319d32SAditya Kali .get_info = dquot_get_dqinfo, 11037c319d32SAditya Kali .set_info = dquot_set_dqinfo, 11047c319d32SAditya Kali .get_dqblk = dquot_get_dqblk, 11057c319d32SAditya Kali .set_dqblk = dquot_set_dqblk 11067c319d32SAditya Kali }; 1107ac27a0ecSDave Kleikamp #endif 1108ac27a0ecSDave Kleikamp 1109ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1110617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1111617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1112617ba13bSMingming Cao .write_inode = ext4_write_inode, 1113617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11147ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11150930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1116617ba13bSMingming Cao .put_super = ext4_put_super, 1117617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1118c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1119c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1120617ba13bSMingming Cao .statfs = ext4_statfs, 1121617ba13bSMingming Cao .remount_fs = ext4_remount, 1122617ba13bSMingming Cao .show_options = ext4_show_options, 1123ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1124617ba13bSMingming Cao .quota_read = ext4_quota_read, 1125617ba13bSMingming Cao .quota_write = ext4_quota_write, 1126*96c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1127ac27a0ecSDave Kleikamp #endif 1128c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1129ac27a0ecSDave Kleikamp }; 1130ac27a0ecSDave Kleikamp 113139655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11321b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11331b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1134617ba13bSMingming Cao .get_parent = ext4_get_parent, 1135ac27a0ecSDave Kleikamp }; 1136ac27a0ecSDave Kleikamp 1137ac27a0ecSDave Kleikamp enum { 1138ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1139ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 114072578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1141ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 114272578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1143ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1144ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1145ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1146296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1147ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11485a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1149ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1150661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 11511449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 11521449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11535328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1154744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1155fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1156df981d03STheodore Ts'o Opt_max_dir_size_kb, 1157ac27a0ecSDave Kleikamp }; 1158ac27a0ecSDave Kleikamp 1159a447c093SSteven Whitehouse static const match_table_t tokens = { 1160ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1161ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1162ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1163ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1164ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1165ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1166ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1167ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1168ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1169ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1170ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1171ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1172ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1173ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 117472578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 117572578c33STheodore Ts'o {Opt_removed, "orlov"}, 1176ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1177ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1178ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1179ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1180e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11815a916be1STheodore Ts'o {Opt_noload, "noload"}, 118272578c33STheodore Ts'o {Opt_removed, "nobh"}, 118372578c33STheodore Ts'o {Opt_removed, "bh"}, 1184ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 118530773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 118630773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1187ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1188ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1189818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1190818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1191ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1192ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1193ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1194ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11955bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11965bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1197ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1198ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1199ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1200ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1201ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1202ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12035a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1204ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1205ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1206ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1207ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1208ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 120906705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 121006705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 121125ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1212c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 121364769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1214dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 121536ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 121636ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 12176fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12186fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1219240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1220b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1221afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 122206705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 122306705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1224744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1225744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12265328e635SEric Sandeen {Opt_discard, "discard"}, 12275328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1228fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1229fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1230fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1231df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1232c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1233c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1234c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1235c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1236c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1237f3f12faaSJosef Bacik {Opt_err, NULL}, 1238ac27a0ecSDave Kleikamp }; 1239ac27a0ecSDave Kleikamp 1240617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1241ac27a0ecSDave Kleikamp { 1242617ba13bSMingming Cao ext4_fsblk_t sb_block; 1243ac27a0ecSDave Kleikamp char *options = (char *) *data; 1244ac27a0ecSDave Kleikamp 1245ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1246ac27a0ecSDave Kleikamp return 1; /* Default location */ 12470b8e58a1SAndreas Dilger 1248ac27a0ecSDave Kleikamp options += 3; 12490b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1250ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1251ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12524776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1253ac27a0ecSDave Kleikamp (char *) *data); 1254ac27a0ecSDave Kleikamp return 1; 1255ac27a0ecSDave Kleikamp } 1256ac27a0ecSDave Kleikamp if (*options == ',') 1257ac27a0ecSDave Kleikamp options++; 1258ac27a0ecSDave Kleikamp *data = (void *) options; 12590b8e58a1SAndreas Dilger 1260ac27a0ecSDave Kleikamp return sb_block; 1261ac27a0ecSDave Kleikamp } 1262ac27a0ecSDave Kleikamp 1263b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1264437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1265437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1266b3881f74STheodore Ts'o 126756c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 126856c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 126956c50f11SDmitry Monakhov { 127056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 127156c50f11SDmitry Monakhov char *qname; 127203dafb5fSChen Gang int ret = -1; 127356c50f11SDmitry Monakhov 127456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 127556c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 127656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127756c50f11SDmitry Monakhov "Cannot change journaled " 127856c50f11SDmitry Monakhov "quota options when quota turned on"); 127957f73c2cSTheodore Ts'o return -1; 128056c50f11SDmitry Monakhov } 1281262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1282262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1283262b4662SJan Kara "when QUOTA feature is enabled"); 1284262b4662SJan Kara return -1; 1285262b4662SJan Kara } 128656c50f11SDmitry Monakhov qname = match_strdup(args); 128756c50f11SDmitry Monakhov if (!qname) { 128856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128956c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 129057f73c2cSTheodore Ts'o return -1; 129156c50f11SDmitry Monakhov } 129203dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 129303dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 129403dafb5fSChen Gang ret = 1; 129503dafb5fSChen Gang else 129656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129703dafb5fSChen Gang "%s quota file already specified", 129803dafb5fSChen Gang QTYPE2NAME(qtype)); 129903dafb5fSChen Gang goto errout; 130056c50f11SDmitry Monakhov } 130103dafb5fSChen Gang if (strchr(qname, '/')) { 130256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 130356c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 130403dafb5fSChen Gang goto errout; 130556c50f11SDmitry Monakhov } 130603dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1307fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 130856c50f11SDmitry Monakhov return 1; 130903dafb5fSChen Gang errout: 131003dafb5fSChen Gang kfree(qname); 131103dafb5fSChen Gang return ret; 131256c50f11SDmitry Monakhov } 131356c50f11SDmitry Monakhov 131456c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 131556c50f11SDmitry Monakhov { 131656c50f11SDmitry Monakhov 131756c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 131856c50f11SDmitry Monakhov 131956c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 132056c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 132156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 132256c50f11SDmitry Monakhov " when quota turned on"); 132357f73c2cSTheodore Ts'o return -1; 132456c50f11SDmitry Monakhov } 132503dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 132656c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 132756c50f11SDmitry Monakhov return 1; 132856c50f11SDmitry Monakhov } 132956c50f11SDmitry Monakhov #endif 133056c50f11SDmitry Monakhov 133126092bf5STheodore Ts'o #define MOPT_SET 0x0001 133226092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 133326092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 133426092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 133526092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 133626092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 133726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 133826092bf5STheodore Ts'o #define MOPT_Q 0 133926092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 134026092bf5STheodore Ts'o #else 134126092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 134226092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 134326092bf5STheodore Ts'o #endif 134426092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13458dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13468dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13478dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1348ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 134926092bf5STheodore Ts'o 135026092bf5STheodore Ts'o static const struct mount_opts { 135126092bf5STheodore Ts'o int token; 135226092bf5STheodore Ts'o int mount_opt; 135326092bf5STheodore Ts'o int flags; 135426092bf5STheodore Ts'o } ext4_mount_opts[] = { 135526092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 135626092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 135726092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 135826092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 135926092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 136026092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13618dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13628dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13638dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13648dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 136526092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 136626092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13678dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13688dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13698dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 137059d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 13718dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 13728dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 137326092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13748dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 13758dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13768dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 137726092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 137826092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 137926092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13808dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13818dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13828dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13838dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 138426092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 138526092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 138626092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 138726092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 138826092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 138926092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 139026092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 139126092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 139226092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 139326092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 139426092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 13950efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 13960efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 13970efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 1398ad4eec61SEric Sandeen {Opt_journal_path, 0, MOPT_STRING}, 13990efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 14008dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14018dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14028dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 14038dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 140426092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 140526092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 140626092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 140726092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 140826092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 140926092bf5STheodore Ts'o #else 141026092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 141126092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 141226092bf5STheodore Ts'o #endif 141326092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 141426092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 141526092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 141626092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 141726092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 141826092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 141926092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 142026092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 142126092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 142226092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 142326092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 142426092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 142526092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 142626092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 142726092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 142826092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1429df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 143026092bf5STheodore Ts'o {Opt_err, 0, 0} 143126092bf5STheodore Ts'o }; 143226092bf5STheodore Ts'o 143326092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 143426092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 143526092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 143626092bf5STheodore Ts'o { 143726092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 143826092bf5STheodore Ts'o const struct mount_opts *m; 143908cefc7aSEric W. Biederman kuid_t uid; 144008cefc7aSEric W. Biederman kgid_t gid; 144126092bf5STheodore Ts'o int arg = 0; 144226092bf5STheodore Ts'o 144357f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 144457f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 144557f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 144657f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 144757f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 144857f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 144957f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 145057f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 145157f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 145257f73c2cSTheodore Ts'o #endif 145326092bf5STheodore Ts'o switch (token) { 1454f7048605STheodore Ts'o case Opt_noacl: 1455f7048605STheodore Ts'o case Opt_nouser_xattr: 1456f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1457f7048605STheodore Ts'o break; 145826092bf5STheodore Ts'o case Opt_sb: 145926092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 146026092bf5STheodore Ts'o case Opt_removed: 14615f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 146226092bf5STheodore Ts'o return 1; 146326092bf5STheodore Ts'o case Opt_abort: 146426092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 146526092bf5STheodore Ts'o return 1; 146626092bf5STheodore Ts'o case Opt_i_version: 146726092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 146826092bf5STheodore Ts'o return 1; 146926092bf5STheodore Ts'o } 147026092bf5STheodore Ts'o 14715f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14725f3633e3SJan Kara if (token == m->token) 14735f3633e3SJan Kara break; 14745f3633e3SJan Kara 14755f3633e3SJan Kara if (m->token == Opt_err) { 14765f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 14775f3633e3SJan Kara "or missing value", opt); 14785f3633e3SJan Kara return -1; 14795f3633e3SJan Kara } 14805f3633e3SJan Kara 14818dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 14828dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14838dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 14848dc0aa8cSTheodore Ts'o return -1; 14858dc0aa8cSTheodore Ts'o } 14868dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 14878dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14888dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 14898dc0aa8cSTheodore Ts'o return -1; 14908dc0aa8cSTheodore Ts'o } 14918dc0aa8cSTheodore Ts'o 1492ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 14930efb3b23SJan Kara return -1; 149426092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 149526092bf5STheodore Ts'o return -1; 149626092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 149726092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 149826092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 149926092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 150026092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 150126092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 150226092bf5STheodore Ts'o "options when quota turned on"); 150326092bf5STheodore Ts'o return -1; 150426092bf5STheodore Ts'o } 150526092bf5STheodore Ts'o 150626092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 150726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 150826092bf5STheodore Ts'o } else if (token == Opt_commit) { 150926092bf5STheodore Ts'o if (arg == 0) 151026092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 151126092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 151226092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 151326092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 151426092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 151526092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 151626092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1517e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1518e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1519e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1520e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 152126092bf5STheodore Ts'o return -1; 152226092bf5STheodore Ts'o } 152326092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 152426092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 152526092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 152626092bf5STheodore Ts'o if (!args->from) 152726092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 152826092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1529df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1530df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 153126092bf5STheodore Ts'o } else if (token == Opt_stripe) { 153226092bf5STheodore Ts'o sbi->s_stripe = arg; 15330efb3b23SJan Kara } else if (token == Opt_resuid) { 15340efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15350efb3b23SJan Kara if (!uid_valid(uid)) { 15365f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15370efb3b23SJan Kara return -1; 15380efb3b23SJan Kara } 15390efb3b23SJan Kara sbi->s_resuid = uid; 15400efb3b23SJan Kara } else if (token == Opt_resgid) { 15410efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15420efb3b23SJan Kara if (!gid_valid(gid)) { 15435f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15440efb3b23SJan Kara return -1; 15450efb3b23SJan Kara } 15460efb3b23SJan Kara sbi->s_resgid = gid; 15470efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15480efb3b23SJan Kara if (is_remount) { 15490efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15500efb3b23SJan Kara "Cannot specify journal on remount"); 15510efb3b23SJan Kara return -1; 15520efb3b23SJan Kara } 15530efb3b23SJan Kara *journal_devnum = arg; 1554ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1555ad4eec61SEric Sandeen char *journal_path; 1556ad4eec61SEric Sandeen struct inode *journal_inode; 1557ad4eec61SEric Sandeen struct path path; 1558ad4eec61SEric Sandeen int error; 1559ad4eec61SEric Sandeen 1560ad4eec61SEric Sandeen if (is_remount) { 1561ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1562ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1563ad4eec61SEric Sandeen return -1; 1564ad4eec61SEric Sandeen } 1565ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1566ad4eec61SEric Sandeen if (!journal_path) { 1567ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1568ad4eec61SEric Sandeen "journal device string"); 1569ad4eec61SEric Sandeen return -1; 1570ad4eec61SEric Sandeen } 1571ad4eec61SEric Sandeen 1572ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1573ad4eec61SEric Sandeen if (error) { 1574ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1575ad4eec61SEric Sandeen "journal device path: error %d", error); 1576ad4eec61SEric Sandeen kfree(journal_path); 1577ad4eec61SEric Sandeen return -1; 1578ad4eec61SEric Sandeen } 1579ad4eec61SEric Sandeen 1580ad4eec61SEric Sandeen journal_inode = path.dentry->d_inode; 1581ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1582ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1583ad4eec61SEric Sandeen "is not a block device", journal_path); 1584ad4eec61SEric Sandeen path_put(&path); 1585ad4eec61SEric Sandeen kfree(journal_path); 1586ad4eec61SEric Sandeen return -1; 1587ad4eec61SEric Sandeen } 1588ad4eec61SEric Sandeen 1589ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1590ad4eec61SEric Sandeen path_put(&path); 1591ad4eec61SEric Sandeen kfree(journal_path); 15920efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 15930efb3b23SJan Kara if (arg > 7) { 15945f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 15950efb3b23SJan Kara " (must be 0-7)"); 15960efb3b23SJan Kara return -1; 15970efb3b23SJan Kara } 15980efb3b23SJan Kara *journal_ioprio = 15990efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 160026092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 160126092bf5STheodore Ts'o if (is_remount) { 160226092bf5STheodore Ts'o if (!sbi->s_journal) 160326092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 16045f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 160526092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 160626092bf5STheodore Ts'o "Cannot change data mode on remount"); 160726092bf5STheodore Ts'o return -1; 160826092bf5STheodore Ts'o } 160926092bf5STheodore Ts'o } else { 161026092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 161126092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 161226092bf5STheodore Ts'o } 161326092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 161426092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 161526092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 161626092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16175f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16185f3633e3SJan Kara "quota options when quota turned on"); 161926092bf5STheodore Ts'o return -1; 162026092bf5STheodore Ts'o } 1621262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1622262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1623262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1624262b4662SJan Kara "Cannot set journaled quota options " 1625262b4662SJan Kara "when QUOTA feature is enabled"); 1626262b4662SJan Kara return -1; 1627262b4662SJan Kara } 162826092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 162926092bf5STheodore Ts'o #endif 163026092bf5STheodore Ts'o } else { 163126092bf5STheodore Ts'o if (!args->from) 163226092bf5STheodore Ts'o arg = 1; 163326092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 163426092bf5STheodore Ts'o arg = !arg; 163526092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 163626092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 163726092bf5STheodore Ts'o "buggy handling of option %s", opt); 163826092bf5STheodore Ts'o WARN_ON(1); 163926092bf5STheodore Ts'o return -1; 164026092bf5STheodore Ts'o } 164126092bf5STheodore Ts'o if (arg != 0) 164226092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 164326092bf5STheodore Ts'o else 164426092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 164526092bf5STheodore Ts'o } 164626092bf5STheodore Ts'o return 1; 164726092bf5STheodore Ts'o } 164826092bf5STheodore Ts'o 1649ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1650c3191067STheodore Ts'o unsigned long *journal_devnum, 1651b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1652661aa520SEric Sandeen int is_remount) 1653ac27a0ecSDave Kleikamp { 1654617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1655ac27a0ecSDave Kleikamp char *p; 1656ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 165726092bf5STheodore Ts'o int token; 1658ac27a0ecSDave Kleikamp 1659ac27a0ecSDave Kleikamp if (!options) 1660ac27a0ecSDave Kleikamp return 1; 1661ac27a0ecSDave Kleikamp 1662ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1663ac27a0ecSDave Kleikamp if (!*p) 1664ac27a0ecSDave Kleikamp continue; 166515121c18SEric Sandeen /* 166615121c18SEric Sandeen * Initialize args struct so we know whether arg was 166715121c18SEric Sandeen * found; some options take optional arguments. 166815121c18SEric Sandeen */ 1669caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1670ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 167126092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 167226092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1673ac27a0ecSDave Kleikamp return 0; 1674ac27a0ecSDave Kleikamp } 1675ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1676262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1677262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1678262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1679262b4662SJan Kara "feature is enabled"); 1680262b4662SJan Kara return 0; 1681262b4662SJan Kara } 1682ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1683482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1684fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1685ac27a0ecSDave Kleikamp 1686482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1687fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1688ac27a0ecSDave Kleikamp 168956c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1690b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1691b31e1552SEric Sandeen "format mixing"); 1692ac27a0ecSDave Kleikamp return 0; 1693ac27a0ecSDave Kleikamp } 1694ac27a0ecSDave Kleikamp 1695ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1696b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1697b31e1552SEric Sandeen "not specified"); 1698ac27a0ecSDave Kleikamp return 0; 1699ac27a0ecSDave Kleikamp } 1700ac27a0ecSDave Kleikamp } 1701ac27a0ecSDave Kleikamp #endif 1702261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1703261cb20cSJan Kara int blocksize = 1704261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1705261cb20cSJan Kara 1706261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1707261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1708261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1709261cb20cSJan Kara return 0; 1710261cb20cSJan Kara } 1711261cb20cSJan Kara } 1712ac27a0ecSDave Kleikamp return 1; 1713ac27a0ecSDave Kleikamp } 1714ac27a0ecSDave Kleikamp 17152adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17162adf6da8STheodore Ts'o struct super_block *sb) 17172adf6da8STheodore Ts'o { 17182adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17192adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17202adf6da8STheodore Ts'o 17212adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17222adf6da8STheodore Ts'o char *fmtname = ""; 17232adf6da8STheodore Ts'o 17242adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17252adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17262adf6da8STheodore Ts'o fmtname = "vfsold"; 17272adf6da8STheodore Ts'o break; 17282adf6da8STheodore Ts'o case QFMT_VFS_V0: 17292adf6da8STheodore Ts'o fmtname = "vfsv0"; 17302adf6da8STheodore Ts'o break; 17312adf6da8STheodore Ts'o case QFMT_VFS_V1: 17322adf6da8STheodore Ts'o fmtname = "vfsv1"; 17332adf6da8STheodore Ts'o break; 17342adf6da8STheodore Ts'o } 17352adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17362adf6da8STheodore Ts'o } 17372adf6da8STheodore Ts'o 17382adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17392adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17402adf6da8STheodore Ts'o 17412adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17422adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17432adf6da8STheodore Ts'o #endif 17442adf6da8STheodore Ts'o } 17452adf6da8STheodore Ts'o 17465a916be1STheodore Ts'o static const char *token2str(int token) 17475a916be1STheodore Ts'o { 174850df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17495a916be1STheodore Ts'o 17505a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17515a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17525a916be1STheodore Ts'o break; 17535a916be1STheodore Ts'o return t->pattern; 17545a916be1STheodore Ts'o } 17555a916be1STheodore Ts'o 17562adf6da8STheodore Ts'o /* 17572adf6da8STheodore Ts'o * Show an option if 17582adf6da8STheodore Ts'o * - it's set to a non-default value OR 17592adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17602adf6da8STheodore Ts'o */ 176166acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 176266acdcf4STheodore Ts'o int nodefs) 17632adf6da8STheodore Ts'o { 17642adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17652adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 176666acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17675a916be1STheodore Ts'o const struct mount_opts *m; 176866acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17692adf6da8STheodore Ts'o 177066acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 177166acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17722adf6da8STheodore Ts'o 17732adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17745a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17755a916be1STheodore Ts'o 17765a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17775a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17785a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17795a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17805a916be1STheodore Ts'o continue; 178166acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17825a916be1STheodore Ts'o continue; /* skip if same as the default */ 17835a916be1STheodore Ts'o if ((want_set && 17845a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17855a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17865a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17875a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17885a916be1STheodore Ts'o } 17895a916be1STheodore Ts'o 179008cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17915a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 179208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 179308cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 179408cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 17955a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 179608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 179708cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 179866acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 17995a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18005a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18012adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18025a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18032adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18045a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 180566acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18065a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 180766acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18085a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 180966acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18105a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18112adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18125a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 181366acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18145a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 181566acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18162adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18175a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18182adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18195a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18202adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18215a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18225a916be1STheodore Ts'o } 182366acdcf4STheodore Ts'o if (nodefs || 182466acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18255a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18262adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18272adf6da8STheodore Ts'o 182866acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 182966acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18305a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1831df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1832df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18332adf6da8STheodore Ts'o 18342adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18352adf6da8STheodore Ts'o return 0; 18362adf6da8STheodore Ts'o } 18372adf6da8STheodore Ts'o 183866acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 183966acdcf4STheodore Ts'o { 184066acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 184166acdcf4STheodore Ts'o } 184266acdcf4STheodore Ts'o 184366acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 184466acdcf4STheodore Ts'o { 184566acdcf4STheodore Ts'o struct super_block *sb = seq->private; 184666acdcf4STheodore Ts'o int rc; 184766acdcf4STheodore Ts'o 184866acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 184966acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 185066acdcf4STheodore Ts'o seq_puts(seq, "\n"); 185166acdcf4STheodore Ts'o return rc; 185266acdcf4STheodore Ts'o } 185366acdcf4STheodore Ts'o 185466acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 185566acdcf4STheodore Ts'o { 1856d9dda78bSAl Viro return single_open(file, options_seq_show, PDE_DATA(inode)); 185766acdcf4STheodore Ts'o } 185866acdcf4STheodore Ts'o 185966acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 186066acdcf4STheodore Ts'o .owner = THIS_MODULE, 186166acdcf4STheodore Ts'o .open = options_open_fs, 186266acdcf4STheodore Ts'o .read = seq_read, 186366acdcf4STheodore Ts'o .llseek = seq_lseek, 186466acdcf4STheodore Ts'o .release = single_release, 186566acdcf4STheodore Ts'o }; 186666acdcf4STheodore Ts'o 1867617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1868ac27a0ecSDave Kleikamp int read_only) 1869ac27a0ecSDave Kleikamp { 1870617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1871ac27a0ecSDave Kleikamp int res = 0; 1872ac27a0ecSDave Kleikamp 1873617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1874b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1875b31e1552SEric Sandeen "forcing read-only mode"); 1876ac27a0ecSDave Kleikamp res = MS_RDONLY; 1877ac27a0ecSDave Kleikamp } 1878ac27a0ecSDave Kleikamp if (read_only) 1879281b5995STheodore Ts'o goto done; 1880617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1881b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1882b31e1552SEric Sandeen "running e2fsck is recommended"); 1883c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 1884b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1885b31e1552SEric Sandeen "warning: mounting fs with errors, " 1886b31e1552SEric Sandeen "running e2fsck is recommended"); 1887ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1888ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1889ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1890b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1891b31e1552SEric Sandeen "warning: maximal mount count reached, " 1892b31e1552SEric Sandeen "running e2fsck is recommended"); 1893ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1894ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1895ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1896b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1897b31e1552SEric Sandeen "warning: checktime reached, " 1898b31e1552SEric Sandeen "running e2fsck is recommended"); 18990390131bSFrank Mayhar if (!sbi->s_journal) 1900216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1901ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1902617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1903e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1904ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1905617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19060390131bSFrank Mayhar if (sbi->s_journal) 1907617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1908ac27a0ecSDave Kleikamp 1909e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1910281b5995STheodore Ts'o done: 1911ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1912a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1913a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1914ac27a0ecSDave Kleikamp sb->s_blocksize, 1915ac27a0ecSDave Kleikamp sbi->s_groups_count, 1916617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1917617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1918a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1919ac27a0ecSDave Kleikamp 19207abc52c2SDan Magenheimer cleancache_init_fs(sb); 1921ac27a0ecSDave Kleikamp return res; 1922ac27a0ecSDave Kleikamp } 1923ac27a0ecSDave Kleikamp 1924117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1925117fff10STheodore Ts'o { 1926117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1927117fff10STheodore Ts'o struct flex_groups *new_groups; 1928117fff10STheodore Ts'o int size; 1929117fff10STheodore Ts'o 1930117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1931117fff10STheodore Ts'o return 0; 1932117fff10STheodore Ts'o 1933117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1934117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1935117fff10STheodore Ts'o return 0; 1936117fff10STheodore Ts'o 1937117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1938117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1939117fff10STheodore Ts'o if (!new_groups) { 1940117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1941117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1942117fff10STheodore Ts'o return -ENOMEM; 1943117fff10STheodore Ts'o } 1944117fff10STheodore Ts'o 1945117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1946117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1947117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1948117fff10STheodore Ts'o sizeof(struct flex_groups))); 1949117fff10STheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 1950117fff10STheodore Ts'o } 1951117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1952117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1953117fff10STheodore Ts'o return 0; 1954117fff10STheodore Ts'o } 1955117fff10STheodore Ts'o 1956772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1957772cb7c8SJose R. Santos { 1958772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1959772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1960772cb7c8SJose R. Santos ext4_group_t flex_group; 1961117fff10STheodore Ts'o int i, err; 1962772cb7c8SJose R. Santos 1963503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1964d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1965772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1966772cb7c8SJose R. Santos return 1; 1967772cb7c8SJose R. Santos } 1968772cb7c8SJose R. Santos 1969117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1970117fff10STheodore Ts'o if (err) 1971772cb7c8SJose R. Santos goto failed; 1972772cb7c8SJose R. Santos 1973772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 197488b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1975772cb7c8SJose R. Santos 1976772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19777ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19787ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 197990ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 198024aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19817ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19827ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1983772cb7c8SJose R. Santos } 1984772cb7c8SJose R. Santos 1985772cb7c8SJose R. Santos return 1; 1986772cb7c8SJose R. Santos failed: 1987772cb7c8SJose R. Santos return 0; 1988772cb7c8SJose R. Santos } 1989772cb7c8SJose R. Santos 1990feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1991717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1992717d50e4SAndreas Dilger { 1993feb0ab32SDarrick J. Wong int offset; 1994717d50e4SAndreas Dilger __u16 crc = 0; 1995717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1996717d50e4SAndreas Dilger 19979aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 1998feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1999d6a77105STheodore Ts'o __le16 save_csum; 2000feb0ab32SDarrick J. Wong __u32 csum32; 2001feb0ab32SDarrick J. Wong 2002d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 2003feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 2004feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2005feb0ab32SDarrick J. Wong sizeof(le_group)); 2006feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2007feb0ab32SDarrick J. Wong sbi->s_desc_size); 2008d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 2009feb0ab32SDarrick J. Wong 2010feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2011feb0ab32SDarrick J. Wong goto out; 2012feb0ab32SDarrick J. Wong } 2013feb0ab32SDarrick J. Wong 2014feb0ab32SDarrick J. Wong /* old crc16 code */ 2015813d32f9SDarrick J. Wong if (!(sbi->s_es->s_feature_ro_compat & 2016813d32f9SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM))) 2017813d32f9SDarrick J. Wong return 0; 2018813d32f9SDarrick J. Wong 2019feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2020feb0ab32SDarrick J. Wong 2021717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2022717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2023717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2024717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2025717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2026717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2027717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2028717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2029717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2030717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2031717d50e4SAndreas Dilger offset); 2032717d50e4SAndreas Dilger 2033feb0ab32SDarrick J. Wong out: 2034717d50e4SAndreas Dilger return cpu_to_le16(crc); 2035717d50e4SAndreas Dilger } 2036717d50e4SAndreas Dilger 2037feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2038717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2039717d50e4SAndreas Dilger { 2040feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2041feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2042feb0ab32SDarrick J. Wong block_group, gdp))) 2043717d50e4SAndreas Dilger return 0; 2044717d50e4SAndreas Dilger 2045717d50e4SAndreas Dilger return 1; 2046717d50e4SAndreas Dilger } 2047717d50e4SAndreas Dilger 2048feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2049feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2050feb0ab32SDarrick J. Wong { 2051feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2052feb0ab32SDarrick J. Wong return; 2053feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2054feb0ab32SDarrick J. Wong } 2055feb0ab32SDarrick J. Wong 2056ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2057bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2058bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2059ac27a0ecSDave Kleikamp { 2060617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2061617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2062617ba13bSMingming Cao ext4_fsblk_t last_block; 2063bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2064bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2065bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2066ce421581SJose R. Santos int flexbg_flag = 0; 2067bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2068ac27a0ecSDave Kleikamp 2069ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2070ce421581SJose R. Santos flexbg_flag = 1; 2071ce421581SJose R. Santos 2072617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2073ac27a0ecSDave Kleikamp 2074197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2075197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2076197cd65aSAkinobu Mita 2077ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2078bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2079ac27a0ecSDave Kleikamp else 2080ac27a0ecSDave Kleikamp last_block = first_block + 2081617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2082ac27a0ecSDave Kleikamp 2083bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2084bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2085bfff6873SLukas Czerner grp = i; 2086bfff6873SLukas Czerner 20878fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20882b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2089b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2090a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2091b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2092ac27a0ecSDave Kleikamp return 0; 2093ac27a0ecSDave Kleikamp } 20948fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20952b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2096b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2097a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2098b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2099ac27a0ecSDave Kleikamp return 0; 2100ac27a0ecSDave Kleikamp } 21018fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2102bd81d8eeSLaurent Vivier if (inode_table < first_block || 21032b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2104b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2105a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2106b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2107ac27a0ecSDave Kleikamp return 0; 2108ac27a0ecSDave Kleikamp } 2109955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2110feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2111b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2112b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2113fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2114fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21157ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2116955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2117717d50e4SAndreas Dilger return 0; 2118717d50e4SAndreas Dilger } 21197ee1ec4cSLi Zefan } 2120955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2121ce421581SJose R. Santos if (!flexbg_flag) 2122617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2123ac27a0ecSDave Kleikamp } 2124bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2125bfff6873SLukas Czerner *first_not_zeroed = grp; 2126ac27a0ecSDave Kleikamp return 1; 2127ac27a0ecSDave Kleikamp } 2128ac27a0ecSDave Kleikamp 2129617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2130ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2131ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2132ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2133ac27a0ecSDave Kleikamp * 2134ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2135ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2136ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2137ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2138ac27a0ecSDave Kleikamp * 2139ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2140ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2141ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2142617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2143ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2144ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2145ac27a0ecSDave Kleikamp */ 2146617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2147617ba13bSMingming Cao struct ext4_super_block *es) 2148ac27a0ecSDave Kleikamp { 2149ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2150ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2151ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2152ac27a0ecSDave Kleikamp int i; 2153ac27a0ecSDave Kleikamp #endif 2154ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2155ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2156ac27a0ecSDave Kleikamp return; 2157ac27a0ecSDave Kleikamp } 2158ac27a0ecSDave Kleikamp 2159a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2160b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2161b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2162a8f48a95SEric Sandeen return; 2163a8f48a95SEric Sandeen } 2164a8f48a95SEric Sandeen 2165d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2166d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2167d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2168d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2169d39195c3SAmir Goldstein return; 2170d39195c3SAmir Goldstein } 2171d39195c3SAmir Goldstein 2172617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2173c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2174c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 217584474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2176ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2177ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2178c25f9bc6SEric Sandeen } 2179ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2180ac27a0ecSDave Kleikamp return; 2181ac27a0ecSDave Kleikamp } 2182ac27a0ecSDave Kleikamp 2183ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2184b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2185ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2186ac27a0ecSDave Kleikamp } 2187ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2188ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2189ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2190ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2191a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2192617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2193617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2194ac27a0ecSDave Kleikamp if (ret < 0) 2195b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2196b31e1552SEric Sandeen "Cannot turn on journaled " 2197b31e1552SEric Sandeen "quota: error %d", ret); 2198ac27a0ecSDave Kleikamp } 2199ac27a0ecSDave Kleikamp } 2200ac27a0ecSDave Kleikamp #endif 2201ac27a0ecSDave Kleikamp 2202ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2203ac27a0ecSDave Kleikamp struct inode *inode; 2204ac27a0ecSDave Kleikamp 220597bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 220697bd42b9SJosef Bacik if (IS_ERR(inode)) { 2207ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2208ac27a0ecSDave Kleikamp break; 2209ac27a0ecSDave Kleikamp } 2210ac27a0ecSDave Kleikamp 2211617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2212871a2931SChristoph Hellwig dquot_initialize(inode); 2213ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2214566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2215b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2216b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 221746e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2218e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2219ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2220721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 222155f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2222617ba13bSMingming Cao ext4_truncate(inode); 2223721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2224ac27a0ecSDave Kleikamp nr_truncates++; 2225ac27a0ecSDave Kleikamp } else { 2226566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2227b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2228b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 222946e665e9SHarvey Harrison __func__, inode->i_ino); 2230ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2231ac27a0ecSDave Kleikamp inode->i_ino); 2232ac27a0ecSDave Kleikamp nr_orphans++; 2233ac27a0ecSDave Kleikamp } 2234ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2235ac27a0ecSDave Kleikamp } 2236ac27a0ecSDave Kleikamp 2237ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2238ac27a0ecSDave Kleikamp 2239ac27a0ecSDave Kleikamp if (nr_orphans) 2240b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2241b31e1552SEric Sandeen PLURAL(nr_orphans)); 2242ac27a0ecSDave Kleikamp if (nr_truncates) 2243b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2244b31e1552SEric Sandeen PLURAL(nr_truncates)); 2245ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2246ac27a0ecSDave Kleikamp /* Turn quotas off */ 2247a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2248ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2249287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2250ac27a0ecSDave Kleikamp } 2251ac27a0ecSDave Kleikamp #endif 2252ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2253ac27a0ecSDave Kleikamp } 22540b8e58a1SAndreas Dilger 2255cd2291a4SEric Sandeen /* 2256cd2291a4SEric Sandeen * Maximal extent format file size. 2257cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2258cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2259cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2260cd2291a4SEric Sandeen * so that won't be a limiting factor. 2261cd2291a4SEric Sandeen * 2262f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2263f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2264f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2265f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2266f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2267f17722f9SLukas Czerner * 2268cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2269cd2291a4SEric Sandeen */ 2270f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2271cd2291a4SEric Sandeen { 2272cd2291a4SEric Sandeen loff_t res; 2273cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2274cd2291a4SEric Sandeen 2275cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2276f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2277cd2291a4SEric Sandeen /* 227890c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2279cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2280cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2281cd2291a4SEric Sandeen */ 2282cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2283cd2291a4SEric Sandeen 2284cd2291a4SEric Sandeen /* total blocks in file system block size */ 2285cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2286cd2291a4SEric Sandeen upper_limit <<= blkbits; 2287cd2291a4SEric Sandeen } 2288cd2291a4SEric Sandeen 2289f17722f9SLukas Czerner /* 2290f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2291f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2292f17722f9SLukas Czerner * size 2293f17722f9SLukas Czerner */ 2294f17722f9SLukas Czerner res = (1LL << 32) - 1; 2295cd2291a4SEric Sandeen res <<= blkbits; 2296cd2291a4SEric Sandeen 2297cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2298cd2291a4SEric Sandeen if (res > upper_limit) 2299cd2291a4SEric Sandeen res = upper_limit; 2300cd2291a4SEric Sandeen 2301cd2291a4SEric Sandeen return res; 2302cd2291a4SEric Sandeen } 2303ac27a0ecSDave Kleikamp 2304ac27a0ecSDave Kleikamp /* 2305cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23060fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23070fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2308ac27a0ecSDave Kleikamp */ 2309f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2310ac27a0ecSDave Kleikamp { 2311617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23120fc1b451SAneesh Kumar K.V int meta_blocks; 23130fc1b451SAneesh Kumar K.V loff_t upper_limit; 23140b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23150b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23160b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23170b8e58a1SAndreas Dilger * 23180b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23190b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23200fc1b451SAneesh Kumar K.V */ 23210fc1b451SAneesh Kumar K.V 2322f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23230fc1b451SAneesh Kumar K.V /* 232490c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23250b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23260b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23270fc1b451SAneesh Kumar K.V */ 23280fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23290fc1b451SAneesh Kumar K.V 23300fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23310fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23320fc1b451SAneesh Kumar K.V 23330fc1b451SAneesh Kumar K.V } else { 23348180a562SAneesh Kumar K.V /* 23358180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23368180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23378180a562SAneesh Kumar K.V * represent total number of blocks in 23388180a562SAneesh Kumar K.V * file system block size 23398180a562SAneesh Kumar K.V */ 23400fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23410fc1b451SAneesh Kumar K.V 23420fc1b451SAneesh Kumar K.V } 23430fc1b451SAneesh Kumar K.V 23440fc1b451SAneesh Kumar K.V /* indirect blocks */ 23450fc1b451SAneesh Kumar K.V meta_blocks = 1; 23460fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23470fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23480fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23490fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23500fc1b451SAneesh Kumar K.V 23510fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23520fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2353ac27a0ecSDave Kleikamp 2354ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2355ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2356ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2357ac27a0ecSDave Kleikamp res <<= bits; 2358ac27a0ecSDave Kleikamp if (res > upper_limit) 2359ac27a0ecSDave Kleikamp res = upper_limit; 23600fc1b451SAneesh Kumar K.V 23610fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23620fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23630fc1b451SAneesh Kumar K.V 2364ac27a0ecSDave Kleikamp return res; 2365ac27a0ecSDave Kleikamp } 2366ac27a0ecSDave Kleikamp 2367617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 236870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2369ac27a0ecSDave Kleikamp { 2370617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2371fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2372ac27a0ecSDave Kleikamp int has_super = 0; 2373ac27a0ecSDave Kleikamp 2374ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2375ac27a0ecSDave Kleikamp 2376617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2377ac27a0ecSDave Kleikamp nr < first_meta_bg) 237870bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2379ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2380617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2381ac27a0ecSDave Kleikamp has_super = 1; 23820b8e58a1SAndreas Dilger 2383bd63f6b0SDarrick J. Wong /* 2384bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2385bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2386bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2387bd63f6b0SDarrick J. Wong * compensate. 2388bd63f6b0SDarrick J. Wong */ 2389bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2390bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2391bd63f6b0SDarrick J. Wong has_super++; 2392bd63f6b0SDarrick J. Wong 2393617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2394ac27a0ecSDave Kleikamp } 2395ac27a0ecSDave Kleikamp 2396c9de560dSAlex Tomas /** 2397c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2398c9de560dSAlex Tomas * @sbi: In memory super block info 2399c9de560dSAlex Tomas * 2400c9de560dSAlex Tomas * If we have specified it via mount option, then 2401c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2402c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2403c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2404c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2405c9de560dSAlex Tomas * 2406c9de560dSAlex Tomas */ 2407c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2408c9de560dSAlex Tomas { 2409c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2410c9de560dSAlex Tomas unsigned long stripe_width = 2411c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24123eb08658SDan Ehrenberg int ret; 2413c9de560dSAlex Tomas 2414c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24153eb08658SDan Ehrenberg ret = sbi->s_stripe; 24163eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24173eb08658SDan Ehrenberg ret = stripe_width; 24183eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24193eb08658SDan Ehrenberg ret = stride; 24203eb08658SDan Ehrenberg else 24213eb08658SDan Ehrenberg ret = 0; 2422c9de560dSAlex Tomas 24233eb08658SDan Ehrenberg /* 24243eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24253eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24263eb08658SDan Ehrenberg */ 24273eb08658SDan Ehrenberg if (ret <= 1) 24283eb08658SDan Ehrenberg ret = 0; 2429c9de560dSAlex Tomas 24303eb08658SDan Ehrenberg return ret; 2431c9de560dSAlex Tomas } 2432ac27a0ecSDave Kleikamp 24333197ebdbSTheodore Ts'o /* sysfs supprt */ 24343197ebdbSTheodore Ts'o 24353197ebdbSTheodore Ts'o struct ext4_attr { 24363197ebdbSTheodore Ts'o struct attribute attr; 24373197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24383197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24393197ebdbSTheodore Ts'o const char *, size_t); 2440f2d50a65SJan Kara union { 24413197ebdbSTheodore Ts'o int offset; 2442f2d50a65SJan Kara int deprecated_val; 2443f2d50a65SJan Kara } u; 24443197ebdbSTheodore Ts'o }; 24453197ebdbSTheodore Ts'o 244627dd4385SLukas Czerner static int parse_strtoull(const char *buf, 244727dd4385SLukas Czerner unsigned long long max, unsigned long long *value) 244827dd4385SLukas Czerner { 244927dd4385SLukas Czerner int ret; 245027dd4385SLukas Czerner 245127dd4385SLukas Czerner ret = kstrtoull(skip_spaces(buf), 0, value); 245227dd4385SLukas Czerner if (!ret && *value > max) 245327dd4385SLukas Czerner ret = -EINVAL; 245427dd4385SLukas Czerner return ret; 245527dd4385SLukas Czerner } 245627dd4385SLukas Czerner 24573197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24583197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24593197ebdbSTheodore Ts'o char *buf) 24603197ebdbSTheodore Ts'o { 24613197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24627b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24637b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24643197ebdbSTheodore Ts'o } 24653197ebdbSTheodore Ts'o 24663197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24673197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24683197ebdbSTheodore Ts'o { 24693197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24703197ebdbSTheodore Ts'o 2471f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2472f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24733197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24743197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24753197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24763197ebdbSTheodore Ts'o } 24773197ebdbSTheodore Ts'o 24783197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24793197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24803197ebdbSTheodore Ts'o { 24813197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24823197ebdbSTheodore Ts'o 2483f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2484f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24853197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2486a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24873197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2488a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24893197ebdbSTheodore Ts'o } 24903197ebdbSTheodore Ts'o 24913197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24923197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24933197ebdbSTheodore Ts'o const char *buf, size_t count) 24943197ebdbSTheodore Ts'o { 24953197ebdbSTheodore Ts'o unsigned long t; 2496e1091b15SLukas Czerner int ret; 24973197ebdbSTheodore Ts'o 2498e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2499e1091b15SLukas Czerner if (ret) 2500e1091b15SLukas Czerner return ret; 25013197ebdbSTheodore Ts'o 2502e1091b15SLukas Czerner if (t && (!is_power_of_2(t) || t > 0x40000000)) 25033197ebdbSTheodore Ts'o return -EINVAL; 25043197ebdbSTheodore Ts'o 25053197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 25063197ebdbSTheodore Ts'o return count; 25073197ebdbSTheodore Ts'o } 25083197ebdbSTheodore Ts'o 25093197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25103197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25113197ebdbSTheodore Ts'o { 2512f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25133197ebdbSTheodore Ts'o 25143197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25153197ebdbSTheodore Ts'o } 25163197ebdbSTheodore Ts'o 25173197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25183197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25193197ebdbSTheodore Ts'o const char *buf, size_t count) 25203197ebdbSTheodore Ts'o { 2521f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25223197ebdbSTheodore Ts'o unsigned long t; 2523e1091b15SLukas Czerner int ret; 25243197ebdbSTheodore Ts'o 2525e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2526e1091b15SLukas Czerner if (ret) 2527e1091b15SLukas Czerner return ret; 25283197ebdbSTheodore Ts'o *ui = t; 25293197ebdbSTheodore Ts'o return count; 25303197ebdbSTheodore Ts'o } 25313197ebdbSTheodore Ts'o 253252c198c6SLukas Czerner static ssize_t es_ui_show(struct ext4_attr *a, 253352c198c6SLukas Czerner struct ext4_sb_info *sbi, char *buf) 253452c198c6SLukas Czerner { 253552c198c6SLukas Czerner 253652c198c6SLukas Czerner unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) + 253752c198c6SLukas Czerner a->u.offset); 253852c198c6SLukas Czerner 253952c198c6SLukas Czerner return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 254052c198c6SLukas Czerner } 254152c198c6SLukas Czerner 254227dd4385SLukas Czerner static ssize_t reserved_clusters_show(struct ext4_attr *a, 254327dd4385SLukas Czerner struct ext4_sb_info *sbi, char *buf) 254427dd4385SLukas Czerner { 254527dd4385SLukas Czerner return snprintf(buf, PAGE_SIZE, "%llu\n", 254627dd4385SLukas Czerner (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); 254727dd4385SLukas Czerner } 254827dd4385SLukas Czerner 254927dd4385SLukas Czerner static ssize_t reserved_clusters_store(struct ext4_attr *a, 255027dd4385SLukas Czerner struct ext4_sb_info *sbi, 255127dd4385SLukas Czerner const char *buf, size_t count) 255227dd4385SLukas Czerner { 255327dd4385SLukas Czerner unsigned long long val; 255427dd4385SLukas Czerner int ret; 255527dd4385SLukas Czerner 255627dd4385SLukas Czerner if (parse_strtoull(buf, -1ULL, &val)) 255727dd4385SLukas Czerner return -EINVAL; 255827dd4385SLukas Czerner ret = ext4_reserve_clusters(sbi, val); 255927dd4385SLukas Czerner 256027dd4385SLukas Czerner return ret ? ret : count; 256127dd4385SLukas Czerner } 256227dd4385SLukas Czerner 25632c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25642c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25652c0544b2STheodore Ts'o const char *buf, size_t count) 25662c0544b2STheodore Ts'o { 25672c0544b2STheodore Ts'o int len = count; 25682c0544b2STheodore Ts'o 25692c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25702c0544b2STheodore Ts'o return -EPERM; 25712c0544b2STheodore Ts'o 25722c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25732c0544b2STheodore Ts'o len--; 25742c0544b2STheodore Ts'o 25752c0544b2STheodore Ts'o if (len) 25762c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25772c0544b2STheodore Ts'o return count; 25782c0544b2STheodore Ts'o } 25792c0544b2STheodore Ts'o 2580f2d50a65SJan Kara static ssize_t sbi_deprecated_show(struct ext4_attr *a, 2581f2d50a65SJan Kara struct ext4_sb_info *sbi, char *buf) 2582f2d50a65SJan Kara { 2583f2d50a65SJan Kara return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); 2584f2d50a65SJan Kara } 2585f2d50a65SJan Kara 25863197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25873197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25883197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25893197ebdbSTheodore Ts'o .show = _show, \ 25903197ebdbSTheodore Ts'o .store = _store, \ 2591f2d50a65SJan Kara .u = { \ 25923197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname),\ 2593f2d50a65SJan Kara }, \ 25943197ebdbSTheodore Ts'o } 259552c198c6SLukas Czerner 259652c198c6SLukas Czerner #define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \ 259752c198c6SLukas Czerner static struct ext4_attr ext4_attr_##_name = { \ 259852c198c6SLukas Czerner .attr = {.name = __stringify(_name), .mode = _mode }, \ 259952c198c6SLukas Czerner .show = _show, \ 260052c198c6SLukas Czerner .store = _store, \ 260152c198c6SLukas Czerner .u = { \ 260252c198c6SLukas Czerner .offset = offsetof(struct ext4_super_block, _elname), \ 260352c198c6SLukas Czerner }, \ 260452c198c6SLukas Czerner } 260552c198c6SLukas Czerner 26063197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 26073197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 26083197ebdbSTheodore Ts'o 2609857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 26103197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 26113197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 261252c198c6SLukas Czerner 261352c198c6SLukas Czerner #define EXT4_RO_ATTR_ES_UI(name, elname) \ 261452c198c6SLukas Czerner EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname) 26153197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 26163197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 261752c198c6SLukas Czerner 26183197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 2619f2d50a65SJan Kara #define EXT4_DEPRECATED_ATTR(_name, _val) \ 2620f2d50a65SJan Kara static struct ext4_attr ext4_attr_##_name = { \ 2621f2d50a65SJan Kara .attr = {.name = __stringify(_name), .mode = 0444 }, \ 2622f2d50a65SJan Kara .show = sbi_deprecated_show, \ 2623f2d50a65SJan Kara .u = { \ 2624f2d50a65SJan Kara .deprecated_val = _val, \ 2625f2d50a65SJan Kara }, \ 2626f2d50a65SJan Kara } 26273197ebdbSTheodore Ts'o 26283197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 26293197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 26303197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 263127dd4385SLukas Czerner EXT4_RW_ATTR(reserved_clusters); 26323197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 26333197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 263411013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 26353197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 26363197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 26373197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 26383197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26393197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26403197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 2641f2d50a65SJan Kara EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); 264267a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 26432c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 2644efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 2645efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 2646efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 2647efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 2648efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 2649efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 265052c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 265152c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); 265252c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); 26533197ebdbSTheodore Ts'o 26543197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26553197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26563197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26573197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 265827dd4385SLukas Czerner ATTR_LIST(reserved_clusters), 26593197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 266011013911SAndreas Dilger ATTR_LIST(inode_goal), 26613197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26623197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26633197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26643197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26653197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26663197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 266755138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 266867a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 26692c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 2670efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 2671efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_burst), 2672efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 2673efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 2674efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 2675efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 267652c198c6SLukas Czerner ATTR_LIST(errors_count), 267752c198c6SLukas Czerner ATTR_LIST(first_error_time), 267852c198c6SLukas Czerner ATTR_LIST(last_error_time), 26793197ebdbSTheodore Ts'o NULL, 26803197ebdbSTheodore Ts'o }; 26813197ebdbSTheodore Ts'o 2682857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2683857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 268427ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 26855e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2686857ac889SLukas Czerner 2687857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2688857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 268927ee40dfSLukas Czerner ATTR_LIST(batched_discard), 26905e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2691857ac889SLukas Czerner NULL, 2692857ac889SLukas Czerner }; 2693857ac889SLukas Czerner 26943197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 26953197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 26963197ebdbSTheodore Ts'o { 26973197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26983197ebdbSTheodore Ts'o s_kobj); 26993197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27003197ebdbSTheodore Ts'o 27013197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 27023197ebdbSTheodore Ts'o } 27033197ebdbSTheodore Ts'o 27043197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 27053197ebdbSTheodore Ts'o struct attribute *attr, 27063197ebdbSTheodore Ts'o const char *buf, size_t len) 27073197ebdbSTheodore Ts'o { 27083197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27093197ebdbSTheodore Ts'o s_kobj); 27103197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27113197ebdbSTheodore Ts'o 27123197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 27133197ebdbSTheodore Ts'o } 27143197ebdbSTheodore Ts'o 27153197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 27163197ebdbSTheodore Ts'o { 27173197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27183197ebdbSTheodore Ts'o s_kobj); 27193197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 27203197ebdbSTheodore Ts'o } 27213197ebdbSTheodore Ts'o 272252cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 27233197ebdbSTheodore Ts'o .show = ext4_attr_show, 27243197ebdbSTheodore Ts'o .store = ext4_attr_store, 27253197ebdbSTheodore Ts'o }; 27263197ebdbSTheodore Ts'o 27273197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 27283197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 27293197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 27303197ebdbSTheodore Ts'o .release = ext4_sb_release, 27313197ebdbSTheodore Ts'o }; 27323197ebdbSTheodore Ts'o 2733857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2734857ac889SLukas Czerner { 2735857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2736857ac889SLukas Czerner } 2737857ac889SLukas Czerner 2738c7f72543SLukas Czerner static ssize_t ext4_feat_show(struct kobject *kobj, 2739c7f72543SLukas Czerner struct attribute *attr, char *buf) 2740c7f72543SLukas Czerner { 2741c7f72543SLukas Czerner return snprintf(buf, PAGE_SIZE, "supported\n"); 2742c7f72543SLukas Czerner } 2743c7f72543SLukas Czerner 2744c7f72543SLukas Czerner /* 2745c7f72543SLukas Czerner * We can not use ext4_attr_show/store because it relies on the kobject 2746c7f72543SLukas Czerner * being embedded in the ext4_sb_info structure which is definitely not 2747c7f72543SLukas Czerner * true in this case. 2748c7f72543SLukas Czerner */ 2749c7f72543SLukas Czerner static const struct sysfs_ops ext4_feat_ops = { 2750c7f72543SLukas Czerner .show = ext4_feat_show, 2751c7f72543SLukas Czerner .store = NULL, 2752c7f72543SLukas Czerner }; 2753c7f72543SLukas Czerner 2754857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2755857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2756c7f72543SLukas Czerner .sysfs_ops = &ext4_feat_ops, 2757857ac889SLukas Czerner .release = ext4_feat_release, 2758857ac889SLukas Czerner }; 2759857ac889SLukas Czerner 2760a13fb1a4SEric Sandeen /* 2761a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2762a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2763a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2764a13fb1a4SEric Sandeen * 0 if it cannot be. 2765a13fb1a4SEric Sandeen */ 2766a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2767a13fb1a4SEric Sandeen { 2768a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2769a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2770a13fb1a4SEric Sandeen "Couldn't mount because of " 2771a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2772a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2773a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2774a13fb1a4SEric Sandeen return 0; 2775a13fb1a4SEric Sandeen } 2776a13fb1a4SEric Sandeen 2777a13fb1a4SEric Sandeen if (readonly) 2778a13fb1a4SEric Sandeen return 1; 2779a13fb1a4SEric Sandeen 2780a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2781a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2782a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2783a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2784a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2785a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2786a13fb1a4SEric Sandeen return 0; 2787a13fb1a4SEric Sandeen } 2788a13fb1a4SEric Sandeen /* 2789a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2790a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2791a13fb1a4SEric Sandeen */ 2792a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2793a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2794a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2795a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2796a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2797a13fb1a4SEric Sandeen return 0; 2798a13fb1a4SEric Sandeen } 2799a13fb1a4SEric Sandeen } 2800bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2801bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2802bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2803bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2804bab08ab9STheodore Ts'o "extents feature\n"); 2805bab08ab9STheodore Ts'o return 0; 2806bab08ab9STheodore Ts'o } 28077c319d32SAditya Kali 28087c319d32SAditya Kali #ifndef CONFIG_QUOTA 28097c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 28107c319d32SAditya Kali !readonly) { 28117c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28127c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28137c319d32SAditya Kali "without CONFIG_QUOTA"); 28147c319d32SAditya Kali return 0; 28157c319d32SAditya Kali } 28167c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2817a13fb1a4SEric Sandeen return 1; 2818a13fb1a4SEric Sandeen } 2819a13fb1a4SEric Sandeen 282066e61a9eSTheodore Ts'o /* 282166e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 282266e61a9eSTheodore Ts'o * on the file system 282366e61a9eSTheodore Ts'o */ 282466e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 282566e61a9eSTheodore Ts'o { 282666e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 282766e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 282866e61a9eSTheodore Ts'o struct ext4_super_block *es; 282966e61a9eSTheodore Ts'o 283066e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 283166e61a9eSTheodore Ts'o es = sbi->s_es; 283266e61a9eSTheodore Ts'o 283366e61a9eSTheodore Ts'o if (es->s_error_count) 2834ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2835ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 283666e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 283766e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2838ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 283966e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 284066e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 284166e61a9eSTheodore Ts'o es->s_first_error_func, 284266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 284366e61a9eSTheodore Ts'o if (es->s_first_error_ino) 284466e61a9eSTheodore Ts'o printk(": inode %u", 284566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 284666e61a9eSTheodore Ts'o if (es->s_first_error_block) 284766e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 284866e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 284966e61a9eSTheodore Ts'o printk("\n"); 285066e61a9eSTheodore Ts'o } 285166e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2852ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 285366e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 285466e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 285566e61a9eSTheodore Ts'o es->s_last_error_func, 285666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 285766e61a9eSTheodore Ts'o if (es->s_last_error_ino) 285866e61a9eSTheodore Ts'o printk(": inode %u", 285966e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 286066e61a9eSTheodore Ts'o if (es->s_last_error_block) 286166e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 286266e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 286366e61a9eSTheodore Ts'o printk("\n"); 286466e61a9eSTheodore Ts'o } 286566e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 286666e61a9eSTheodore Ts'o } 286766e61a9eSTheodore Ts'o 2868bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2869bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2870bfff6873SLukas Czerner { 2871bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2872bfff6873SLukas Czerner ext4_group_t group, ngroups; 2873bfff6873SLukas Czerner struct super_block *sb; 2874bfff6873SLukas Czerner unsigned long timeout = 0; 2875bfff6873SLukas Czerner int ret = 0; 2876bfff6873SLukas Czerner 2877bfff6873SLukas Czerner sb = elr->lr_super; 2878bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2879bfff6873SLukas Czerner 28808e8ad8a5SJan Kara sb_start_write(sb); 2881bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2882bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2883bfff6873SLukas Czerner if (!gdp) { 2884bfff6873SLukas Czerner ret = 1; 2885bfff6873SLukas Czerner break; 2886bfff6873SLukas Czerner } 2887bfff6873SLukas Czerner 2888bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2889bfff6873SLukas Czerner break; 2890bfff6873SLukas Czerner } 2891bfff6873SLukas Czerner 28927f511862STheodore Ts'o if (group >= ngroups) 2893bfff6873SLukas Czerner ret = 1; 2894bfff6873SLukas Czerner 2895bfff6873SLukas Czerner if (!ret) { 2896bfff6873SLukas Czerner timeout = jiffies; 2897bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2898bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2899bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 290051ce6511SLukas Czerner timeout = (jiffies - timeout) * 290151ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2902bfff6873SLukas Czerner elr->lr_timeout = timeout; 2903bfff6873SLukas Czerner } 2904bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2905bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2906bfff6873SLukas Czerner } 29078e8ad8a5SJan Kara sb_end_write(sb); 2908bfff6873SLukas Czerner 2909bfff6873SLukas Czerner return ret; 2910bfff6873SLukas Czerner } 2911bfff6873SLukas Czerner 2912bfff6873SLukas Czerner /* 2913bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29144ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2915bfff6873SLukas Czerner */ 2916bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2917bfff6873SLukas Czerner { 2918bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2919bfff6873SLukas Czerner 2920bfff6873SLukas Czerner if (!elr) 2921bfff6873SLukas Czerner return; 2922bfff6873SLukas Czerner 2923bfff6873SLukas Czerner sbi = elr->lr_sbi; 2924bfff6873SLukas Czerner 2925bfff6873SLukas Czerner list_del(&elr->lr_request); 2926bfff6873SLukas Czerner sbi->s_li_request = NULL; 2927bfff6873SLukas Czerner kfree(elr); 2928bfff6873SLukas Czerner } 2929bfff6873SLukas Czerner 2930bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2931bfff6873SLukas Czerner { 29321bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29331bb933fbSLukas Czerner if (!ext4_li_info) { 29341bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2935bfff6873SLukas Czerner return; 29361bb933fbSLukas Czerner } 2937bfff6873SLukas Czerner 2938bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29391bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2940bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29411bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2942bfff6873SLukas Czerner } 2943bfff6873SLukas Czerner 29448f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29458f1f7453SEric Sandeen 2946bfff6873SLukas Czerner /* 2947bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2948bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2949bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2950bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2951bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2952bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2953bfff6873SLukas Czerner * next waking time and put itself into sleep. 2954bfff6873SLukas Czerner */ 2955bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2956bfff6873SLukas Czerner { 2957bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2958bfff6873SLukas Czerner struct list_head *pos, *n; 2959bfff6873SLukas Czerner struct ext4_li_request *elr; 29604ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2961bfff6873SLukas Czerner 2962bfff6873SLukas Czerner BUG_ON(NULL == eli); 2963bfff6873SLukas Czerner 2964bfff6873SLukas Czerner cont_thread: 2965bfff6873SLukas Czerner while (true) { 2966bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2967bfff6873SLukas Czerner 2968bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2969bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2970bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2971bfff6873SLukas Czerner goto exit_thread; 2972bfff6873SLukas Czerner } 2973bfff6873SLukas Czerner 2974bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2975bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2976bfff6873SLukas Czerner lr_request); 2977bfff6873SLukas Czerner 2978b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2979b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2980b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2981bfff6873SLukas Czerner ext4_remove_li_request(elr); 2982bfff6873SLukas Czerner continue; 2983bfff6873SLukas Czerner } 2984b2c78cd0STheodore Ts'o } 2985bfff6873SLukas Czerner 2986bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2987bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2988bfff6873SLukas Czerner } 2989bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2990bfff6873SLukas Czerner 2991a0acae0eSTejun Heo try_to_freeze(); 2992bfff6873SLukas Czerner 29934ed5c033SLukas Czerner cur = jiffies; 29944ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2995f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2996bfff6873SLukas Czerner cond_resched(); 2997bfff6873SLukas Czerner continue; 2998bfff6873SLukas Czerner } 2999bfff6873SLukas Czerner 30004ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 30014ed5c033SLukas Czerner 30028f1f7453SEric Sandeen if (kthread_should_stop()) { 30038f1f7453SEric Sandeen ext4_clear_request_list(); 30048f1f7453SEric Sandeen goto exit_thread; 30058f1f7453SEric Sandeen } 3006bfff6873SLukas Czerner } 3007bfff6873SLukas Czerner 3008bfff6873SLukas Czerner exit_thread: 3009bfff6873SLukas Czerner /* 3010bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3011bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3012bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3013bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3014bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3015bfff6873SLukas Czerner * new one. 3016bfff6873SLukas Czerner */ 3017bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3018bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3019bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3020bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3021bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3022bfff6873SLukas Czerner goto cont_thread; 3023bfff6873SLukas Czerner } 3024bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3025bfff6873SLukas Czerner kfree(ext4_li_info); 3026bfff6873SLukas Czerner ext4_li_info = NULL; 3027bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3028bfff6873SLukas Czerner 3029bfff6873SLukas Czerner return 0; 3030bfff6873SLukas Czerner } 3031bfff6873SLukas Czerner 3032bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3033bfff6873SLukas Czerner { 3034bfff6873SLukas Czerner struct list_head *pos, *n; 3035bfff6873SLukas Czerner struct ext4_li_request *elr; 3036bfff6873SLukas Czerner 3037bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3038bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3039bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3040bfff6873SLukas Czerner lr_request); 3041bfff6873SLukas Czerner ext4_remove_li_request(elr); 3042bfff6873SLukas Czerner } 3043bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3044bfff6873SLukas Czerner } 3045bfff6873SLukas Czerner 3046bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3047bfff6873SLukas Czerner { 30488f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30498f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30508f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30518f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3052bfff6873SLukas Czerner ext4_clear_request_list(); 3053bfff6873SLukas Czerner kfree(ext4_li_info); 3054bfff6873SLukas Czerner ext4_li_info = NULL; 305592b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3056bfff6873SLukas Czerner "initialization thread\n", 3057bfff6873SLukas Czerner err); 3058bfff6873SLukas Czerner return err; 3059bfff6873SLukas Czerner } 3060bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3061bfff6873SLukas Czerner return 0; 3062bfff6873SLukas Czerner } 3063bfff6873SLukas Czerner 3064bfff6873SLukas Czerner /* 3065bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3066bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3067bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3068bfff6873SLukas Czerner * groups and return total number of groups. 3069bfff6873SLukas Czerner */ 3070bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3071bfff6873SLukas Czerner { 3072bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3073bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3074bfff6873SLukas Czerner 3075bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3076bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3077bfff6873SLukas Czerner if (!gdp) 3078bfff6873SLukas Czerner continue; 3079bfff6873SLukas Czerner 3080bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3081bfff6873SLukas Czerner break; 3082bfff6873SLukas Czerner } 3083bfff6873SLukas Czerner 3084bfff6873SLukas Czerner return group; 3085bfff6873SLukas Czerner } 3086bfff6873SLukas Czerner 3087bfff6873SLukas Czerner static int ext4_li_info_new(void) 3088bfff6873SLukas Czerner { 3089bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3090bfff6873SLukas Czerner 3091bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3092bfff6873SLukas Czerner if (!eli) 3093bfff6873SLukas Czerner return -ENOMEM; 3094bfff6873SLukas Czerner 3095bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3096bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3097bfff6873SLukas Czerner 3098bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3099bfff6873SLukas Czerner 3100bfff6873SLukas Czerner ext4_li_info = eli; 3101bfff6873SLukas Czerner 3102bfff6873SLukas Czerner return 0; 3103bfff6873SLukas Czerner } 3104bfff6873SLukas Czerner 3105bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3106bfff6873SLukas Czerner ext4_group_t start) 3107bfff6873SLukas Czerner { 3108bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3109bfff6873SLukas Czerner struct ext4_li_request *elr; 3110bfff6873SLukas Czerner 3111bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3112bfff6873SLukas Czerner if (!elr) 3113bfff6873SLukas Czerner return NULL; 3114bfff6873SLukas Czerner 3115bfff6873SLukas Czerner elr->lr_super = sb; 3116bfff6873SLukas Czerner elr->lr_sbi = sbi; 3117bfff6873SLukas Czerner elr->lr_next_group = start; 3118bfff6873SLukas Czerner 3119bfff6873SLukas Czerner /* 3120bfff6873SLukas Czerner * Randomize first schedule time of the request to 3121bfff6873SLukas Czerner * spread the inode table initialization requests 3122bfff6873SLukas Czerner * better. 3123bfff6873SLukas Czerner */ 3124dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3125dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3126bfff6873SLukas Czerner return elr; 3127bfff6873SLukas Czerner } 3128bfff6873SLukas Czerner 31297f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3130bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3131bfff6873SLukas Czerner { 3132bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31337f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3134bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 31356c5a6cb9SAndrew Morton int ret = 0; 3136bfff6873SLukas Czerner 31377f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 313851ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 313951ce6511SLukas Czerner /* 314051ce6511SLukas Czerner * Reset timeout so it can be computed again, because 314151ce6511SLukas Czerner * s_li_wait_mult might have changed. 314251ce6511SLukas Czerner */ 314351ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31447f511862STheodore Ts'o goto out; 314551ce6511SLukas Czerner } 3146bfff6873SLukas Czerner 3147bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3148bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 314955ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31507f511862STheodore Ts'o goto out; 3151bfff6873SLukas Czerner 3152bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31537f511862STheodore Ts'o if (!elr) { 31547f511862STheodore Ts'o ret = -ENOMEM; 31557f511862STheodore Ts'o goto out; 31567f511862STheodore Ts'o } 3157bfff6873SLukas Czerner 3158bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3159bfff6873SLukas Czerner ret = ext4_li_info_new(); 3160bfff6873SLukas Czerner if (ret) 3161bfff6873SLukas Czerner goto out; 3162bfff6873SLukas Czerner } 3163bfff6873SLukas Czerner 3164bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3165bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3166bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3167bfff6873SLukas Czerner 3168bfff6873SLukas Czerner sbi->s_li_request = elr; 316946e4690bSTao Ma /* 317046e4690bSTao Ma * set elr to NULL here since it has been inserted to 317146e4690bSTao Ma * the request_list and the removal and free of it is 317246e4690bSTao Ma * handled by ext4_clear_request_list from now on. 317346e4690bSTao Ma */ 317446e4690bSTao Ma elr = NULL; 3175bfff6873SLukas Czerner 3176bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3177bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3178bfff6873SLukas Czerner if (ret) 3179bfff6873SLukas Czerner goto out; 3180bfff6873SLukas Czerner } 3181bfff6873SLukas Czerner out: 3182bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3183beed5ecbSNicolas Kaiser if (ret) 3184bfff6873SLukas Czerner kfree(elr); 3185bfff6873SLukas Czerner return ret; 3186bfff6873SLukas Czerner } 3187bfff6873SLukas Czerner 3188bfff6873SLukas Czerner /* 3189bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3190bfff6873SLukas Czerner * module unload. 3191bfff6873SLukas Czerner */ 3192bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3193bfff6873SLukas Czerner { 3194bfff6873SLukas Czerner /* 3195bfff6873SLukas Czerner * If thread exited earlier 3196bfff6873SLukas Czerner * there's nothing to be done. 3197bfff6873SLukas Czerner */ 31988f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3199bfff6873SLukas Czerner return; 3200bfff6873SLukas Czerner 32018f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3202bfff6873SLukas Czerner } 3203bfff6873SLukas Czerner 320425ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 320525ed6e8aSDarrick J. Wong { 320625ed6e8aSDarrick J. Wong int ret = 1; 320725ed6e8aSDarrick J. Wong int compat, incompat; 320825ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 320925ed6e8aSDarrick J. Wong 32109aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3211db9ee220SDarrick J. Wong /* journal checksum v3 */ 321225ed6e8aSDarrick J. Wong compat = 0; 3213db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 321425ed6e8aSDarrick J. Wong } else { 321525ed6e8aSDarrick J. Wong /* journal checksum v1 */ 321625ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 321725ed6e8aSDarrick J. Wong incompat = 0; 321825ed6e8aSDarrick J. Wong } 321925ed6e8aSDarrick J. Wong 3220feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3221feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3222feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3223feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 322425ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 322525ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 322625ed6e8aSDarrick J. Wong compat, 0, 322725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 322825ed6e8aSDarrick J. Wong incompat); 322925ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 323025ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 323125ed6e8aSDarrick J. Wong compat, 0, 323225ed6e8aSDarrick J. Wong incompat); 323325ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 323425ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 323525ed6e8aSDarrick J. Wong } else { 3236feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3237feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 323825ed6e8aSDarrick J. Wong } 323925ed6e8aSDarrick J. Wong 324025ed6e8aSDarrick J. Wong return ret; 324125ed6e8aSDarrick J. Wong } 324225ed6e8aSDarrick J. Wong 3243952fc18eSTheodore Ts'o /* 3244952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3245952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3246952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3247952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3248952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3249952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3250952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3251952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3252952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3253952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3254952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3255952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3256952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3257952fc18eSTheodore Ts'o */ 3258952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3259952fc18eSTheodore Ts'o char *buf) 3260952fc18eSTheodore Ts'o { 3261952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3262952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3263952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3264952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3265952fc18eSTheodore Ts'o int s, j, count = 0; 3266952fc18eSTheodore Ts'o 32670548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 32680548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32690548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32700548bbb8STheodore Ts'o 3271952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3272952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3273952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3274952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3275952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3276952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3277952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3278952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3279952fc18eSTheodore Ts'o count++; 3280952fc18eSTheodore Ts'o } 3281952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3282952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3283952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3284952fc18eSTheodore Ts'o count++; 3285952fc18eSTheodore Ts'o } 3286952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3287952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3288952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3289952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3290952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3291952fc18eSTheodore Ts'o count++; 3292952fc18eSTheodore Ts'o } 3293952fc18eSTheodore Ts'o if (i != grp) 3294952fc18eSTheodore Ts'o continue; 3295952fc18eSTheodore Ts'o s = 0; 3296952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3297952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3298952fc18eSTheodore Ts'o count++; 3299952fc18eSTheodore Ts'o } 3300952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3301952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3302952fc18eSTheodore Ts'o count++; 3303952fc18eSTheodore Ts'o } 3304952fc18eSTheodore Ts'o } 3305952fc18eSTheodore Ts'o if (!count) 3306952fc18eSTheodore Ts'o return 0; 3307952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3308952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3309952fc18eSTheodore Ts'o } 3310952fc18eSTheodore Ts'o 3311952fc18eSTheodore Ts'o /* 3312952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3313952fc18eSTheodore Ts'o */ 3314952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3315952fc18eSTheodore Ts'o { 3316952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3317952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3318952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3319952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3320952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3321952fc18eSTheodore Ts'o 3322952fc18eSTheodore Ts'o if (!buf) 3323952fc18eSTheodore Ts'o return -ENOMEM; 3324952fc18eSTheodore Ts'o 3325952fc18eSTheodore Ts'o /* 3326952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3327952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3328952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3329952fc18eSTheodore Ts'o */ 3330952fc18eSTheodore Ts'o 3331952fc18eSTheodore Ts'o /* 3332952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3333952fc18eSTheodore Ts'o */ 3334952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3335952fc18eSTheodore Ts'o 3336952fc18eSTheodore Ts'o /* 3337952fc18eSTheodore Ts'o * Add the overhead found in each block group 3338952fc18eSTheodore Ts'o */ 3339952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3340952fc18eSTheodore Ts'o int blks; 3341952fc18eSTheodore Ts'o 3342952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3343952fc18eSTheodore Ts'o overhead += blks; 3344952fc18eSTheodore Ts'o if (blks) 3345952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3346952fc18eSTheodore Ts'o cond_resched(); 3347952fc18eSTheodore Ts'o } 33480875a2b4SEric Sandeen /* Add the journal blocks as well */ 33490875a2b4SEric Sandeen if (sbi->s_journal) 3350810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33510875a2b4SEric Sandeen 3352952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3353952fc18eSTheodore Ts'o smp_wmb(); 3354952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3355952fc18eSTheodore Ts'o return 0; 3356952fc18eSTheodore Ts'o } 3357952fc18eSTheodore Ts'o 335827dd4385SLukas Czerner 335930fac0f7SJan Kara static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) 336027dd4385SLukas Czerner { 336127dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 336227dd4385SLukas Czerner 336327dd4385SLukas Czerner /* 336430fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 336530fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 336630fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 336730fac0f7SJan Kara * to keep ext2/3 backward compatibility. 336830fac0f7SJan Kara */ 336930fac0f7SJan Kara if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 337030fac0f7SJan Kara return 0; 337130fac0f7SJan Kara /* 337227dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 337327dd4385SLukas Czerner * This should cover the situations where we can not afford to run 337427dd4385SLukas Czerner * out of space like for example punch hole, or converting 3375556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 337627dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 337727dd4385SLukas Czerner * very rare. 337827dd4385SLukas Czerner */ 337930fac0f7SJan Kara resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> 338030fac0f7SJan Kara EXT4_SB(sb)->s_cluster_bits; 338127dd4385SLukas Czerner 338227dd4385SLukas Czerner do_div(resv_clusters, 50); 338327dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 338427dd4385SLukas Czerner 338527dd4385SLukas Czerner return resv_clusters; 338627dd4385SLukas Czerner } 338727dd4385SLukas Czerner 338827dd4385SLukas Czerner 338927dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) 339027dd4385SLukas Czerner { 339127dd4385SLukas Czerner ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> 339227dd4385SLukas Czerner sbi->s_cluster_bits; 339327dd4385SLukas Czerner 339427dd4385SLukas Czerner if (count >= clusters) 339527dd4385SLukas Czerner return -EINVAL; 339627dd4385SLukas Czerner 339727dd4385SLukas Czerner atomic64_set(&sbi->s_resv_clusters, count); 339827dd4385SLukas Czerner return 0; 339927dd4385SLukas Czerner } 340027dd4385SLukas Czerner 3401617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3402ac27a0ecSDave Kleikamp { 3403d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3404ac27a0ecSDave Kleikamp struct buffer_head *bh; 3405617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3406617ba13bSMingming Cao struct ext4_sb_info *sbi; 3407617ba13bSMingming Cao ext4_fsblk_t block; 3408617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 340970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3410ac27a0ecSDave Kleikamp unsigned long offset = 0; 3411ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3412ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3413ac27a0ecSDave Kleikamp struct inode *root; 34149f6200bbSTheodore Ts'o char *cp; 34150390131bSFrank Mayhar const char *descr; 3416dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3417281b5995STheodore Ts'o int blocksize, clustersize; 34184ec11028STheodore Ts'o unsigned int db_count; 34194ec11028STheodore Ts'o unsigned int i; 3420281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3421bd81d8eeSLaurent Vivier __u64 blocks_count; 342207aa2ea1SLukas Czerner int err = 0; 3423b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3424bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3425ac27a0ecSDave Kleikamp 3426ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3427ac27a0ecSDave Kleikamp if (!sbi) 3428dcc7dae3SCyrill Gorcunov goto out_free_orig; 3429705895b6SPekka Enberg 3430705895b6SPekka Enberg sbi->s_blockgroup_lock = 3431705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3432705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3433705895b6SPekka Enberg kfree(sbi); 3434dcc7dae3SCyrill Gorcunov goto out_free_orig; 3435705895b6SPekka Enberg } 3436ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34372c0544b2STheodore Ts'o sbi->s_sb = sb; 3438240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3439d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3440f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3441f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3442f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3443ac27a0ecSDave Kleikamp 34449f6200bbSTheodore Ts'o /* Cleanup superblock name */ 34459f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 34469f6200bbSTheodore Ts'o *cp = '!'; 34479f6200bbSTheodore Ts'o 344807aa2ea1SLukas Czerner /* -EINVAL is default */ 3449dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3450617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3451ac27a0ecSDave Kleikamp if (!blocksize) { 3452b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3453ac27a0ecSDave Kleikamp goto out_fail; 3454ac27a0ecSDave Kleikamp } 3455ac27a0ecSDave Kleikamp 3456ac27a0ecSDave Kleikamp /* 3457617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3458ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3459ac27a0ecSDave Kleikamp */ 3460617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 346170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 346270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3463ac27a0ecSDave Kleikamp } else { 346470bbb3e0SAndrew Morton logical_sb_block = sb_block; 3465ac27a0ecSDave Kleikamp } 3466ac27a0ecSDave Kleikamp 3467a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3468b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3469ac27a0ecSDave Kleikamp goto out_fail; 3470ac27a0ecSDave Kleikamp } 3471ac27a0ecSDave Kleikamp /* 3472ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3473617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3474ac27a0ecSDave Kleikamp */ 34752716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3476ac27a0ecSDave Kleikamp sbi->s_es = es; 3477ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3478617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3479617ba13bSMingming Cao goto cantfind_ext4; 3480afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3481ac27a0ecSDave Kleikamp 3482feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3483feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3484feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3485feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3486feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3487feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3488feb0ab32SDarrick J. Wong 3489d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3490d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3491d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3492d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3493d25425f8SDarrick J. Wong silent = 1; 3494d25425f8SDarrick J. Wong goto cantfind_ext4; 3495d25425f8SDarrick J. Wong } 3496d25425f8SDarrick J. Wong 34970441984aSDarrick J. Wong /* Load the checksum driver */ 34980441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 34990441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 35000441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 35010441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 35020441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 35030441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 35040441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 35050441984aSDarrick J. Wong goto failed_mount; 35060441984aSDarrick J. Wong } 35070441984aSDarrick J. Wong } 35080441984aSDarrick J. Wong 3509a9c47317SDarrick J. Wong /* Check superblock checksum */ 3510a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3511a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3512a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3513a9c47317SDarrick J. Wong silent = 1; 3514a9c47317SDarrick J. Wong goto cantfind_ext4; 3515a9c47317SDarrick J. Wong } 3516a9c47317SDarrick J. Wong 3517a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 35189aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) 3519a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3520a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3521a9c47317SDarrick J. Wong 3522ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3523ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3524fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3525617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3526fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 352787f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3528fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3529617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3530fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3531ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3532fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 353303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3534fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35352e7842b8SHugh Dickins #endif 353698c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 353798c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 353898c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 353998c1a759SDarrick J. Wong 3540617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3541fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3542617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3543fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3544617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3545fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3546ac27a0ecSDave Kleikamp 3547617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3548fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3549bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3550fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3551bb4f397aSAneesh Kumar K.V else 3552fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 355345f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3554fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35558b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3556fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3557ac27a0ecSDave Kleikamp 355808cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 355908cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 356030773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 356130773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 356230773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3563ac27a0ecSDave Kleikamp 35648b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3565fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3566ac27a0ecSDave Kleikamp 35671e2462f9SMingming Cao /* 3568dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3569dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3570dd919b98SAneesh Kumar K.V */ 3571bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35728b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3573fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3574dd919b98SAneesh Kumar K.V 357551ce6511SLukas Czerner /* 357651ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 357751ce6511SLukas Czerner * no mount option specified. 357851ce6511SLukas Czerner */ 357951ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 358051ce6511SLukas Czerner 35818b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3582661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 35838b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35848b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35858b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 35868b67f04aSTheodore Ts'o } 35875a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3588b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3589661aa520SEric Sandeen &journal_ioprio, 0)) 3590ac27a0ecSDave Kleikamp goto failed_mount; 3591ac27a0ecSDave Kleikamp 359256889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 359356889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 359456889787STheodore Ts'o "with data=journal disables delayed " 359556889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 359656889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 359756889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 359856889787STheodore Ts'o "both data=journal and delalloc"); 359956889787STheodore Ts'o goto failed_mount; 360056889787STheodore Ts'o } 360156889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 360256889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 36036ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 360456889787STheodore Ts'o goto failed_mount; 360556889787STheodore Ts'o } 360656889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 360756889787STheodore Ts'o clear_opt(sb, DELALLOC); 360856889787STheodore Ts'o } 360956889787STheodore Ts'o 3610ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3611482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3612ac27a0ecSDave Kleikamp 3613617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3614617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3615617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3616617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3617b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3618b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3619b31e1552SEric Sandeen "running e2fsck is recommended"); 3620469108ffSTheodore Tso 3621ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3622ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3623ed3654ebSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, 3624ed3654ebSTheodore Ts'o EXT4_FEATURE_INCOMPAT_64BIT)) { 3625ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3626ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3627ed3654ebSTheodore Ts'o goto failed_mount; 3628ed3654ebSTheodore Ts'o } 3629ed3654ebSTheodore Ts'o } 3630ed3654ebSTheodore Ts'o 36312035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36322035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36332035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36342035e776STheodore Ts'o "using the ext4 subsystem"); 36352035e776STheodore Ts'o else { 36362035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36372035e776STheodore Ts'o "to feature incompatibilities"); 36382035e776STheodore Ts'o goto failed_mount; 36392035e776STheodore Ts'o } 36402035e776STheodore Ts'o } 36412035e776STheodore Ts'o 36422035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36432035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36442035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36452035e776STheodore Ts'o "using the ext4 subsystem"); 36462035e776STheodore Ts'o else { 36472035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36482035e776STheodore Ts'o "to feature incompatibilities"); 36492035e776STheodore Ts'o goto failed_mount; 36502035e776STheodore Ts'o } 36512035e776STheodore Ts'o } 36522035e776STheodore Ts'o 3653469108ffSTheodore Tso /* 3654ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3655ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3656ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3657ac27a0ecSDave Kleikamp */ 3658a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3659ac27a0ecSDave Kleikamp goto failed_mount; 3660a13fb1a4SEric Sandeen 3661261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3662617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3663617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3664b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3665b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3666ac27a0ecSDave Kleikamp goto failed_mount; 3667ac27a0ecSDave Kleikamp } 3668ac27a0ecSDave Kleikamp 3669ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3670ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3671ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3672b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3673ce40733cSAneesh Kumar K.V blocksize); 3674ac27a0ecSDave Kleikamp goto failed_mount; 3675ac27a0ecSDave Kleikamp } 3676ac27a0ecSDave Kleikamp 3677ac27a0ecSDave Kleikamp brelse(bh); 367870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 367970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3680a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3681ac27a0ecSDave Kleikamp if (!bh) { 3682b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3683b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3684ac27a0ecSDave Kleikamp goto failed_mount; 3685ac27a0ecSDave Kleikamp } 36862716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3687ac27a0ecSDave Kleikamp sbi->s_es = es; 3688617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3689b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3690b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3691ac27a0ecSDave Kleikamp goto failed_mount; 3692ac27a0ecSDave Kleikamp } 3693ac27a0ecSDave Kleikamp } 3694ac27a0ecSDave Kleikamp 3695a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3696a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3697f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3698f287a1a5STheodore Ts'o has_huge_files); 3699f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3700ac27a0ecSDave Kleikamp 3701617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3702617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3703617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3704ac27a0ecSDave Kleikamp } else { 3705ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3706ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3707617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 37081330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3709ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3710b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3711b31e1552SEric Sandeen "unsupported inode size: %d", 3712ac27a0ecSDave Kleikamp sbi->s_inode_size); 3713ac27a0ecSDave Kleikamp goto failed_mount; 3714ac27a0ecSDave Kleikamp } 3715ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3716ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3717ac27a0ecSDave Kleikamp } 37180b8e58a1SAndreas Dilger 37190d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 37200d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 37218fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 37220d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3723d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3724b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3725b31e1552SEric Sandeen "unsupported descriptor size %lu", 37260d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37270d1ee42fSAlexandre Ratchov goto failed_mount; 37280d1ee42fSAlexandre Ratchov } 37290d1ee42fSAlexandre Ratchov } else 37300d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37310b8e58a1SAndreas Dilger 3732ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3733ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3734b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3735617ba13bSMingming Cao goto cantfind_ext4; 37360b8e58a1SAndreas Dilger 3737617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3738ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3739617ba13bSMingming Cao goto cantfind_ext4; 3740ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3741ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37420d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3743ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3744ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3745e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3746e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37470b8e58a1SAndreas Dilger 3748ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3749ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3750ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 375123301410STheodore Ts'o if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { 3752f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3753f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3754f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3755f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3756f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 375723301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 375823301410STheodore Ts'o es->s_flags |= 375923301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3760f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3761f99b2589STheodore Ts'o #else 376223301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 376323301410STheodore Ts'o es->s_flags |= 376423301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3765f99b2589STheodore Ts'o #endif 3766f99b2589STheodore Ts'o } 376723301410STheodore Ts'o } 3768ac27a0ecSDave Kleikamp 3769281b5995STheodore Ts'o /* Handle clustersize */ 3770281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3771281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3772281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3773281b5995STheodore Ts'o if (has_bigalloc) { 3774281b5995STheodore Ts'o if (clustersize < blocksize) { 3775281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3776281b5995STheodore Ts'o "cluster size (%d) smaller than " 3777281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3778281b5995STheodore Ts'o goto failed_mount; 3779281b5995STheodore Ts'o } 3780281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3781281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3782281b5995STheodore Ts'o sbi->s_clusters_per_group = 3783281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3784281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3785281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3786281b5995STheodore Ts'o "#clusters per group too big: %lu", 3787281b5995STheodore Ts'o sbi->s_clusters_per_group); 3788281b5995STheodore Ts'o goto failed_mount; 3789281b5995STheodore Ts'o } 3790281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3791281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3792281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3793281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3794281b5995STheodore Ts'o sbi->s_blocks_per_group, 3795281b5995STheodore Ts'o sbi->s_clusters_per_group); 3796281b5995STheodore Ts'o goto failed_mount; 3797281b5995STheodore Ts'o } 3798281b5995STheodore Ts'o } else { 3799281b5995STheodore Ts'o if (clustersize != blocksize) { 3800281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3801281b5995STheodore Ts'o "block size (%d)", clustersize, 3802281b5995STheodore Ts'o blocksize); 3803281b5995STheodore Ts'o clustersize = blocksize; 3804281b5995STheodore Ts'o } 3805ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3806b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3807b31e1552SEric Sandeen "#blocks per group too big: %lu", 3808ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3809ac27a0ecSDave Kleikamp goto failed_mount; 3810ac27a0ecSDave Kleikamp } 3811281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3812281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3813281b5995STheodore Ts'o } 3814281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3815281b5995STheodore Ts'o 3816ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3817b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3818b31e1552SEric Sandeen "#inodes per group too big: %lu", 3819ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3820ac27a0ecSDave Kleikamp goto failed_mount; 3821ac27a0ecSDave Kleikamp } 3822ac27a0ecSDave Kleikamp 3823960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3824960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3825960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3826960fd856STheodore Ts'o 3827bf43d84bSEric Sandeen /* 3828bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3829bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3830bf43d84bSEric Sandeen */ 38315a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 383230ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38335a9ae68aSDarrick J. Wong if (err) { 3834b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3835bf43d84bSEric Sandeen " too large to mount safely on this system"); 3836ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 383790c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3838ac27a0ecSDave Kleikamp goto failed_mount; 3839ac27a0ecSDave Kleikamp } 3840ac27a0ecSDave Kleikamp 3841617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3842617ba13bSMingming Cao goto cantfind_ext4; 3843e7c95593SEric Sandeen 38440f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38450f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38460f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3847b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3848b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38490f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38500f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38510f2ddca6SFrom: Thiemo Nagel } 38520f2ddca6SFrom: Thiemo Nagel 38534ec11028STheodore Ts'o /* 38544ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38554ec11028STheodore Ts'o * of the filesystem. 38564ec11028STheodore Ts'o */ 38574ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3858b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3859b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3860e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38614ec11028STheodore Ts'o ext4_blocks_count(es)); 3862e7c95593SEric Sandeen goto failed_mount; 3863e7c95593SEric Sandeen } 3864bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3865bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3866bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3867bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 38684ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3869b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 38704ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3871b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 38724ec11028STheodore Ts'o ext4_blocks_count(es), 38734ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 38744ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 38754ec11028STheodore Ts'o goto failed_mount; 38764ec11028STheodore Ts'o } 3877bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3878fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3879fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3880617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3881617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3882f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3883f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3884ac27a0ecSDave Kleikamp GFP_KERNEL); 3885ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3886b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 38872cde417dSTheodore Ts'o ret = -ENOMEM; 3888ac27a0ecSDave Kleikamp goto failed_mount; 3889ac27a0ecSDave Kleikamp } 3890ac27a0ecSDave Kleikamp 38919f6200bbSTheodore Ts'o if (ext4_proc_root) 38929f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3893240799cdSTheodore Ts'o 389466acdcf4STheodore Ts'o if (sbi->s_proc) 389566acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 389666acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 389766acdcf4STheodore Ts'o 3898705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3899ac27a0ecSDave Kleikamp 3900ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 390170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3902a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3903ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3904b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3905b31e1552SEric Sandeen "can't read group descriptor %d", i); 3906ac27a0ecSDave Kleikamp db_count = i; 3907ac27a0ecSDave Kleikamp goto failed_mount2; 3908ac27a0ecSDave Kleikamp } 3909ac27a0ecSDave Kleikamp } 3910bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3911b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3912f9ae9cf5STheodore Ts'o goto failed_mount2; 3913ac27a0ecSDave Kleikamp } 3914772cb7c8SJose R. Santos 3915f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3916ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3917ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3918ac27a0ecSDave Kleikamp 391904496411STao Ma init_timer(&sbi->s_err_report); 392004496411STao Ma sbi->s_err_report.function = print_daily_error_info; 392104496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 392204496411STao Ma 3923a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3924eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3925ce7e010aSTheodore Ts'o goto failed_mount3; 3926ce7e010aSTheodore Ts'o 3927c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 392867a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3929c9de560dSAlex Tomas 3930f9ae9cf5STheodore Ts'o /* 3931f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3932f9ae9cf5STheodore Ts'o */ 3933f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3934617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3935617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3936ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3937617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3938262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 39397c319d32SAditya Kali sb->s_qcop = &ext4_qctl_sysfile_operations; 3940262b4662SJan Kara else 3941262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3942*96c7e0d9SJan Kara sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 3943ac27a0ecSDave Kleikamp #endif 3944f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3945f2fa2ffcSAneesh Kumar K.V 3946ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39473b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3948ac27a0ecSDave Kleikamp 3949ac27a0ecSDave Kleikamp sb->s_root = NULL; 3950ac27a0ecSDave Kleikamp 3951ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3952617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3953617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3954ac27a0ecSDave Kleikamp 3955c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3956c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3957c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 395850460fe8SDarrick J. Wong goto failed_mount3a; 3959c5e06d10SJohann Lombardi 3960ac27a0ecSDave Kleikamp /* 3961ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3962ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3963ac27a0ecSDave Kleikamp */ 3964ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3965617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3966617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 396750460fe8SDarrick J. Wong goto failed_mount3a; 39680390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 39690390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3970b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3971b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3972744692dcSJiaying Zhang goto failed_mount_wq; 3973ac27a0ecSDave Kleikamp } else { 3974fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 39750390131bSFrank Mayhar sbi->s_journal = NULL; 39760390131bSFrank Mayhar needs_recovery = 0; 39770390131bSFrank Mayhar goto no_journal; 3978ac27a0ecSDave Kleikamp } 3979ac27a0ecSDave Kleikamp 3980f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3981eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3982eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3983b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3984744692dcSJiaying Zhang goto failed_mount_wq; 3985eb40a09cSJose R. Santos } 3986eb40a09cSJose R. Santos 398725ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 398825ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 398925ed6e8aSDarrick J. Wong "feature set"); 399025ed6e8aSDarrick J. Wong goto failed_mount_wq; 3991d4da6c9cSLinus Torvalds } 3992818d276cSGirish Shilamkar 3993ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3994ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3995ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3996ac27a0ecSDave Kleikamp case 0: 3997ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 399863f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 399963f57933SAndrew Morton * cope, else JOURNAL_DATA 400063f57933SAndrew Morton */ 4001dab291afSMingming Cao if (jbd2_journal_check_available_features 4002dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 4003fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4004ac27a0ecSDave Kleikamp else 4005fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4006ac27a0ecSDave Kleikamp break; 4007ac27a0ecSDave Kleikamp 4008617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4009617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4010dab291afSMingming Cao if (!jbd2_journal_check_available_features 4011dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4012b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4013b31e1552SEric Sandeen "requested data journaling mode"); 4014744692dcSJiaying Zhang goto failed_mount_wq; 4015ac27a0ecSDave Kleikamp } 4016ac27a0ecSDave Kleikamp default: 4017ac27a0ecSDave Kleikamp break; 4018ac27a0ecSDave Kleikamp } 4019b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4020ac27a0ecSDave Kleikamp 402118aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 402218aadd47SBobi Jam 4023ce7e010aSTheodore Ts'o no_journal: 40249c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 40259c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 40269c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40279c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40289c191f70ST Makphaibulchoke goto failed_mount_wq; 40299c191f70ST Makphaibulchoke } 40309c191f70ST Makphaibulchoke } 40319c191f70ST Makphaibulchoke 4032fd89d5f2STejun Heo /* 4033952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4034952fc18eSTheodore Ts'o * superblock if present. 4035952fc18eSTheodore Ts'o */ 4036952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4037952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4038952fc18eSTheodore Ts'o else { 403907aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 404007aa2ea1SLukas Czerner if (err) 4041952fc18eSTheodore Ts'o goto failed_mount_wq; 4042952fc18eSTheodore Ts'o } 4043952fc18eSTheodore Ts'o 4044952fc18eSTheodore Ts'o /* 4045fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4046fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4047fd89d5f2STejun Heo */ 40482e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40492e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40502e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40512e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 405207aa2ea1SLukas Czerner ret = -ENOMEM; 40532e8fa54eSJan Kara goto failed_mount4; 40542e8fa54eSJan Kara } 40552e8fa54eSJan Kara 4056ac27a0ecSDave Kleikamp /* 4057dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4058ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4059ac27a0ecSDave Kleikamp */ 4060ac27a0ecSDave Kleikamp 40611d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 40621d1fe1eeSDavid Howells if (IS_ERR(root)) { 4063b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 40641d1fe1eeSDavid Howells ret = PTR_ERR(root); 406532a9bb57SManish Katiyar root = NULL; 4066ac27a0ecSDave Kleikamp goto failed_mount4; 4067ac27a0ecSDave Kleikamp } 4068ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4069b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 407094bf608aSAl Viro iput(root); 4071ac27a0ecSDave Kleikamp goto failed_mount4; 4072ac27a0ecSDave Kleikamp } 407348fde701SAl Viro sb->s_root = d_make_root(root); 40741d1fe1eeSDavid Howells if (!sb->s_root) { 4075b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 40761d1fe1eeSDavid Howells ret = -ENOMEM; 40771d1fe1eeSDavid Howells goto failed_mount4; 40781d1fe1eeSDavid Howells } 4079ac27a0ecSDave Kleikamp 40807e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 40817e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4082ef7f3835SKalpak Shah 4083ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4084ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 4085ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4086ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4087ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 4088ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 4089ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4090ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4091ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4092ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4093ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4094ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4095ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4096ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4097ef7f3835SKalpak Shah } 4098ef7f3835SKalpak Shah } 4099ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4100ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4101ef7f3835SKalpak Shah sbi->s_inode_size) { 4102ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4103ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4104b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4105b31e1552SEric Sandeen "available"); 4106ef7f3835SKalpak Shah } 4107ef7f3835SKalpak Shah 410830fac0f7SJan Kara err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); 410927dd4385SLukas Czerner if (err) { 411027dd4385SLukas Czerner ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " 411130fac0f7SJan Kara "reserved pool", ext4_calculate_resv_clusters(sb)); 4112f9ae9cf5STheodore Ts'o goto failed_mount4a; 411327dd4385SLukas Czerner } 411427dd4385SLukas Czerner 41156fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 41166fd058f7STheodore Ts'o if (err) { 4117b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4118fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4119f9ae9cf5STheodore Ts'o goto failed_mount4a; 4120f9ae9cf5STheodore Ts'o } 4121f9ae9cf5STheodore Ts'o 4122f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4123f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4124f9ae9cf5STheodore Ts'o if (err) { 4125f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4126f9ae9cf5STheodore Ts'o err); 4127dcf2d804STao Ma goto failed_mount5; 4128c2774d84SAneesh Kumar K.V } 4129c2774d84SAneesh Kumar K.V 4130d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4131d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4132d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4133908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4134908c7f19STejun Heo GFP_KERNEL); 4135d5e03cbbSTheodore Ts'o if (!err) { 4136d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4137d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4138908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4139908c7f19STejun Heo GFP_KERNEL); 4140d5e03cbbSTheodore Ts'o } 4141d5e03cbbSTheodore Ts'o if (!err) 4142d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4143908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4144d5e03cbbSTheodore Ts'o if (!err) 4145908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4146908c7f19STejun Heo GFP_KERNEL); 4147d5e03cbbSTheodore Ts'o if (err) { 4148d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4149d5e03cbbSTheodore Ts'o goto failed_mount6; 4150d5e03cbbSTheodore Ts'o } 4151d5e03cbbSTheodore Ts'o 4152d5e03cbbSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 4153d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4154d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4155d5e03cbbSTheodore Ts'o "unable to initialize " 4156d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4157d5e03cbbSTheodore Ts'o goto failed_mount6; 4158d5e03cbbSTheodore Ts'o } 4159d5e03cbbSTheodore Ts'o 4160bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4161bfff6873SLukas Czerner if (err) 4162dcf2d804STao Ma goto failed_mount6; 4163bfff6873SLukas Czerner 41643197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 41653197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 41663197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 41673197ebdbSTheodore Ts'o "%s", sb->s_id); 4168dcf2d804STao Ma if (err) 4169dcf2d804STao Ma goto failed_mount7; 41703197ebdbSTheodore Ts'o 41719b2ff357SJan Kara #ifdef CONFIG_QUOTA 41729b2ff357SJan Kara /* Enable quota usage during mount. */ 41739b2ff357SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 41749b2ff357SJan Kara !(sb->s_flags & MS_RDONLY)) { 41759b2ff357SJan Kara err = ext4_enable_quotas(sb); 41769b2ff357SJan Kara if (err) 41779b2ff357SJan Kara goto failed_mount8; 41789b2ff357SJan Kara } 41799b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 41809b2ff357SJan Kara 4181617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4182617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4183617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 41840390131bSFrank Mayhar if (needs_recovery) { 4185b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4186617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 41870390131bSFrank Mayhar } 41880390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 41890390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 41900390131bSFrank Mayhar descr = " journalled data mode"; 41910390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 41920390131bSFrank Mayhar descr = " ordered data mode"; 41930390131bSFrank Mayhar else 41940390131bSFrank Mayhar descr = " writeback data mode"; 41950390131bSFrank Mayhar } else 41960390131bSFrank Mayhar descr = "out journal"; 41970390131bSFrank Mayhar 419879add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 419979add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 420079add3a3SLukas Czerner if (!blk_queue_discard(q)) 420179add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 420279add3a3SLukas Czerner "mounting with \"discard\" option, but " 420379add3a3SLukas Czerner "the device does not support discard"); 420479add3a3SLukas Czerner } 420579add3a3SLukas Czerner 4206d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 42078b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 42088b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4209ac27a0ecSDave Kleikamp 421066e61a9eSTheodore Ts'o if (es->s_error_count) 421166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4212ac27a0ecSDave Kleikamp 4213efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4214efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4215efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4216efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4217efbed4dcSTheodore Ts'o 4218d4c402d9SCurt Wohlgemuth kfree(orig_data); 4219ac27a0ecSDave Kleikamp return 0; 4220ac27a0ecSDave Kleikamp 4221617ba13bSMingming Cao cantfind_ext4: 4222ac27a0ecSDave Kleikamp if (!silent) 4223b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4224ac27a0ecSDave Kleikamp goto failed_mount; 4225ac27a0ecSDave Kleikamp 422672ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 422772ba7450STheodore Ts'o failed_mount8: 422872ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 422972ba7450STheodore Ts'o #endif 4230dcf2d804STao Ma failed_mount7: 4231dcf2d804STao Ma ext4_unregister_li_request(sb); 4232dcf2d804STao Ma failed_mount6: 4233f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4234d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4235d5e03cbbSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 4236d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4237d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4238d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4239d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 424000764937SAzat Khuzhin failed_mount5: 4241f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4242f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4243f9ae9cf5STheodore Ts'o failed_mount4a: 424494bf608aSAl Viro dput(sb->s_root); 424532a9bb57SManish Katiyar sb->s_root = NULL; 424694bf608aSAl Viro failed_mount4: 4247b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 42482e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 42492e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 42504c0425ffSMingming Cao failed_mount_wq: 42510390131bSFrank Mayhar if (sbi->s_journal) { 4252dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 425347b4a50bSJan Kara sbi->s_journal = NULL; 42540390131bSFrank Mayhar } 425550460fe8SDarrick J. Wong failed_mount3a: 4256d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4257eb68d0e2SZheng Liu failed_mount3: 42589105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4259c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4260c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4261ac27a0ecSDave Kleikamp failed_mount2: 4262ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4263ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4264f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4265ac27a0ecSDave Kleikamp failed_mount: 42660441984aSDarrick J. Wong if (sbi->s_chksum_driver) 42670441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4268240799cdSTheodore Ts'o if (sbi->s_proc) { 426966acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 42709f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4271240799cdSTheodore Ts'o } 4272ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4273a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4274ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4275ac27a0ecSDave Kleikamp #endif 4276617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4277ac27a0ecSDave Kleikamp brelse(bh); 4278ac27a0ecSDave Kleikamp out_fail: 4279ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4280f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4281ac27a0ecSDave Kleikamp kfree(sbi); 4282dcc7dae3SCyrill Gorcunov out_free_orig: 4283d4c402d9SCurt Wohlgemuth kfree(orig_data); 428407aa2ea1SLukas Czerner return err ? err : ret; 4285ac27a0ecSDave Kleikamp } 4286ac27a0ecSDave Kleikamp 4287ac27a0ecSDave Kleikamp /* 4288ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4289ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4290ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4291ac27a0ecSDave Kleikamp */ 4292617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4293ac27a0ecSDave Kleikamp { 4294617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4295ac27a0ecSDave Kleikamp 4296ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 429730773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 429830773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4299ac27a0ecSDave Kleikamp 4300a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4301ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4302dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4303ac27a0ecSDave Kleikamp else 4304dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 43055bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 43065bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 43075bf5683aSHidehiro Kawai else 43085bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4309a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4310ac27a0ecSDave Kleikamp } 4311ac27a0ecSDave Kleikamp 4312617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4313ac27a0ecSDave Kleikamp unsigned int journal_inum) 4314ac27a0ecSDave Kleikamp { 4315ac27a0ecSDave Kleikamp struct inode *journal_inode; 4316ac27a0ecSDave Kleikamp journal_t *journal; 4317ac27a0ecSDave Kleikamp 43180390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43190390131bSFrank Mayhar 4320ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4321ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4322ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4323ac27a0ecSDave Kleikamp 43241d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43251d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4326b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4327ac27a0ecSDave Kleikamp return NULL; 4328ac27a0ecSDave Kleikamp } 4329ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4330ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4331ac27a0ecSDave Kleikamp iput(journal_inode); 4332b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4333ac27a0ecSDave Kleikamp return NULL; 4334ac27a0ecSDave Kleikamp } 4335ac27a0ecSDave Kleikamp 4336e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4337ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 43381d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4339b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4340ac27a0ecSDave Kleikamp iput(journal_inode); 4341ac27a0ecSDave Kleikamp return NULL; 4342ac27a0ecSDave Kleikamp } 4343ac27a0ecSDave Kleikamp 4344dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4345ac27a0ecSDave Kleikamp if (!journal) { 4346b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4347ac27a0ecSDave Kleikamp iput(journal_inode); 4348ac27a0ecSDave Kleikamp return NULL; 4349ac27a0ecSDave Kleikamp } 4350ac27a0ecSDave Kleikamp journal->j_private = sb; 4351617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4352ac27a0ecSDave Kleikamp return journal; 4353ac27a0ecSDave Kleikamp } 4354ac27a0ecSDave Kleikamp 4355617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4356ac27a0ecSDave Kleikamp dev_t j_dev) 4357ac27a0ecSDave Kleikamp { 4358ac27a0ecSDave Kleikamp struct buffer_head *bh; 4359ac27a0ecSDave Kleikamp journal_t *journal; 4360617ba13bSMingming Cao ext4_fsblk_t start; 4361617ba13bSMingming Cao ext4_fsblk_t len; 4362ac27a0ecSDave Kleikamp int hblock, blocksize; 4363617ba13bSMingming Cao ext4_fsblk_t sb_block; 4364ac27a0ecSDave Kleikamp unsigned long offset; 4365617ba13bSMingming Cao struct ext4_super_block *es; 4366ac27a0ecSDave Kleikamp struct block_device *bdev; 4367ac27a0ecSDave Kleikamp 43680390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43690390131bSFrank Mayhar 4370b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4371ac27a0ecSDave Kleikamp if (bdev == NULL) 4372ac27a0ecSDave Kleikamp return NULL; 4373ac27a0ecSDave Kleikamp 4374ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4375e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4376ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4377b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4378b31e1552SEric Sandeen "blocksize too small for journal device"); 4379ac27a0ecSDave Kleikamp goto out_bdev; 4380ac27a0ecSDave Kleikamp } 4381ac27a0ecSDave Kleikamp 4382617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4383617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4384ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4385ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4386b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4387b31e1552SEric Sandeen "external journal"); 4388ac27a0ecSDave Kleikamp goto out_bdev; 4389ac27a0ecSDave Kleikamp } 4390ac27a0ecSDave Kleikamp 43912716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4392617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4393ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4394617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4395b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4396b31e1552SEric Sandeen "bad superblock"); 4397ac27a0ecSDave Kleikamp brelse(bh); 4398ac27a0ecSDave Kleikamp goto out_bdev; 4399ac27a0ecSDave Kleikamp } 4400ac27a0ecSDave Kleikamp 4401df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4402df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4403df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4404df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4405df4763beSDarrick J. Wong "corrupt superblock"); 4406df4763beSDarrick J. Wong brelse(bh); 4407df4763beSDarrick J. Wong goto out_bdev; 4408df4763beSDarrick J. Wong } 4409df4763beSDarrick J. Wong 4410617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4411b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4412ac27a0ecSDave Kleikamp brelse(bh); 4413ac27a0ecSDave Kleikamp goto out_bdev; 4414ac27a0ecSDave Kleikamp } 4415ac27a0ecSDave Kleikamp 4416bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4417ac27a0ecSDave Kleikamp start = sb_block + 1; 4418ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4419ac27a0ecSDave Kleikamp 4420dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4421ac27a0ecSDave Kleikamp start, len, blocksize); 4422ac27a0ecSDave Kleikamp if (!journal) { 4423b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4424ac27a0ecSDave Kleikamp goto out_bdev; 4425ac27a0ecSDave Kleikamp } 4426ac27a0ecSDave Kleikamp journal->j_private = sb; 44279f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4428ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4429ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4430b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4431ac27a0ecSDave Kleikamp goto out_journal; 4432ac27a0ecSDave Kleikamp } 4433ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4434b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4435b31e1552SEric Sandeen "user (unsupported) - %d", 4436ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4437ac27a0ecSDave Kleikamp goto out_journal; 4438ac27a0ecSDave Kleikamp } 4439617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4440617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4441ac27a0ecSDave Kleikamp return journal; 44420b8e58a1SAndreas Dilger 4443ac27a0ecSDave Kleikamp out_journal: 4444dab291afSMingming Cao jbd2_journal_destroy(journal); 4445ac27a0ecSDave Kleikamp out_bdev: 4446617ba13bSMingming Cao ext4_blkdev_put(bdev); 4447ac27a0ecSDave Kleikamp return NULL; 4448ac27a0ecSDave Kleikamp } 4449ac27a0ecSDave Kleikamp 4450617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4451617ba13bSMingming Cao struct ext4_super_block *es, 4452ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4453ac27a0ecSDave Kleikamp { 4454ac27a0ecSDave Kleikamp journal_t *journal; 4455ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4456ac27a0ecSDave Kleikamp dev_t journal_dev; 4457ac27a0ecSDave Kleikamp int err = 0; 4458ac27a0ecSDave Kleikamp int really_read_only; 4459ac27a0ecSDave Kleikamp 44600390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44610390131bSFrank Mayhar 4462ac27a0ecSDave Kleikamp if (journal_devnum && 4463ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4464b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4465b31e1552SEric Sandeen "numbers have changed"); 4466ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4467ac27a0ecSDave Kleikamp } else 4468ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4469ac27a0ecSDave Kleikamp 4470ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4471ac27a0ecSDave Kleikamp 4472ac27a0ecSDave Kleikamp /* 4473ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4474ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4475ac27a0ecSDave Kleikamp * can get read-write access to the device. 4476ac27a0ecSDave Kleikamp */ 4477617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4478ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4479b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4480b31e1552SEric Sandeen "required on readonly filesystem"); 4481ac27a0ecSDave Kleikamp if (really_read_only) { 4482b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4483b31e1552SEric Sandeen "unavailable, cannot proceed"); 4484ac27a0ecSDave Kleikamp return -EROFS; 4485ac27a0ecSDave Kleikamp } 4486b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4487b31e1552SEric Sandeen "be enabled during recovery"); 4488ac27a0ecSDave Kleikamp } 4489ac27a0ecSDave Kleikamp } 4490ac27a0ecSDave Kleikamp 4491ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4492b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4493b31e1552SEric Sandeen "and inode journals!"); 4494ac27a0ecSDave Kleikamp return -EINVAL; 4495ac27a0ecSDave Kleikamp } 4496ac27a0ecSDave Kleikamp 4497ac27a0ecSDave Kleikamp if (journal_inum) { 4498617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4499ac27a0ecSDave Kleikamp return -EINVAL; 4500ac27a0ecSDave Kleikamp } else { 4501617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4502ac27a0ecSDave Kleikamp return -EINVAL; 4503ac27a0ecSDave Kleikamp } 4504ac27a0ecSDave Kleikamp 450590576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4506b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 45074776004fSTheodore Ts'o 4508617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4509dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 45101c13d5c0STheodore Ts'o if (!err) { 45111c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 45121c13d5c0STheodore Ts'o if (save) 45131c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 45141c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4515dab291afSMingming Cao err = jbd2_journal_load(journal); 45161c13d5c0STheodore Ts'o if (save) 45171c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 45181c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 45191c13d5c0STheodore Ts'o kfree(save); 45201c13d5c0STheodore Ts'o } 4521ac27a0ecSDave Kleikamp 4522ac27a0ecSDave Kleikamp if (err) { 4523b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4524dab291afSMingming Cao jbd2_journal_destroy(journal); 4525ac27a0ecSDave Kleikamp return err; 4526ac27a0ecSDave Kleikamp } 4527ac27a0ecSDave Kleikamp 4528617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4529617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4530ac27a0ecSDave Kleikamp 4531c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4532ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4533ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4534ac27a0ecSDave Kleikamp 4535ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4536e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4537ac27a0ecSDave Kleikamp } 4538ac27a0ecSDave Kleikamp 4539ac27a0ecSDave Kleikamp return 0; 4540ac27a0ecSDave Kleikamp } 4541ac27a0ecSDave Kleikamp 4542e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4543ac27a0ecSDave Kleikamp { 4544e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4545617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4546c4be0c1dSTakashi Sato int error = 0; 4547ac27a0ecSDave Kleikamp 45487c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4549c4be0c1dSTakashi Sato return error; 4550914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4551914258bfSTheodore Ts'o /* 4552914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4553914258bfSTheodore Ts'o * superblock failed. This could happen because the 4554914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4555914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4556914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4557914258bfSTheodore Ts'o * write and hope for the best. 4558914258bfSTheodore Ts'o */ 4559b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4560b31e1552SEric Sandeen "superblock detected"); 4561914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4562914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4563914258bfSTheodore Ts'o } 456471290b36STheodore Ts'o /* 456571290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 456671290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 456771290b36STheodore Ts'o * write time when we are mounting the root file system 456871290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 456971290b36STheodore Ts'o * for people who are east of GMT and who make their clock 457071290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 457171290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 457271290b36STheodore Ts'o * to complain and force a full file system check. 457371290b36STheodore Ts'o */ 457471290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4575ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4576f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4577afc32f7eSTheodore Ts'o es->s_kbytes_written = 4578afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4579afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4580afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4581f613dfcbSTheodore Ts'o else 4582f613dfcbSTheodore Ts'o es->s_kbytes_written = 4583f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4584d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 458557042651STheodore Ts'o ext4_free_blocks_count_set(es, 458657042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 458757042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4588d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 45897f93cff9STheodore Ts'o es->s_free_inodes_count = 45907f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 45915d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4592ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 459306db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4594ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4595914258bfSTheodore Ts'o if (sync) { 4596c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4597c4be0c1dSTakashi Sato if (error) 4598c4be0c1dSTakashi Sato return error; 4599c4be0c1dSTakashi Sato 4600c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4601c4be0c1dSTakashi Sato if (error) { 4602b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4603b31e1552SEric Sandeen "superblock"); 4604914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4605914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4606914258bfSTheodore Ts'o } 4607914258bfSTheodore Ts'o } 4608c4be0c1dSTakashi Sato return error; 4609ac27a0ecSDave Kleikamp } 4610ac27a0ecSDave Kleikamp 4611ac27a0ecSDave Kleikamp /* 4612ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4613ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4614ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4615ac27a0ecSDave Kleikamp */ 4616617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4617617ba13bSMingming Cao struct ext4_super_block *es) 4618ac27a0ecSDave Kleikamp { 4619617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4620ac27a0ecSDave Kleikamp 46210390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 46220390131bSFrank Mayhar BUG_ON(journal != NULL); 46230390131bSFrank Mayhar return; 46240390131bSFrank Mayhar } 4625dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46267ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 46277ffe1ea8SHidehiro Kawai goto out; 46287ffe1ea8SHidehiro Kawai 4629617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4630ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4631617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4632e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4633ac27a0ecSDave Kleikamp } 46347ffe1ea8SHidehiro Kawai 46357ffe1ea8SHidehiro Kawai out: 4636dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4637ac27a0ecSDave Kleikamp } 4638ac27a0ecSDave Kleikamp 4639ac27a0ecSDave Kleikamp /* 4640ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4641ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4642ac27a0ecSDave Kleikamp * main filesystem now. 4643ac27a0ecSDave Kleikamp */ 4644617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4645617ba13bSMingming Cao struct ext4_super_block *es) 4646ac27a0ecSDave Kleikamp { 4647ac27a0ecSDave Kleikamp journal_t *journal; 4648ac27a0ecSDave Kleikamp int j_errno; 4649ac27a0ecSDave Kleikamp const char *errstr; 4650ac27a0ecSDave Kleikamp 46510390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 46520390131bSFrank Mayhar 4653617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4654ac27a0ecSDave Kleikamp 4655ac27a0ecSDave Kleikamp /* 4656ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4657617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4658ac27a0ecSDave Kleikamp */ 4659ac27a0ecSDave Kleikamp 4660dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4661ac27a0ecSDave Kleikamp if (j_errno) { 4662ac27a0ecSDave Kleikamp char nbuf[16]; 4663ac27a0ecSDave Kleikamp 4664617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 466512062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4666ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 466712062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4668ac27a0ecSDave Kleikamp 4669617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4670617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4671e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4672ac27a0ecSDave Kleikamp 4673dab291afSMingming Cao jbd2_journal_clear_err(journal); 4674d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4675ac27a0ecSDave Kleikamp } 4676ac27a0ecSDave Kleikamp } 4677ac27a0ecSDave Kleikamp 4678ac27a0ecSDave Kleikamp /* 4679ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4680ac27a0ecSDave Kleikamp * and wait on the commit. 4681ac27a0ecSDave Kleikamp */ 4682617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4683ac27a0ecSDave Kleikamp { 4684ac27a0ecSDave Kleikamp journal_t *journal; 4685ac27a0ecSDave Kleikamp 4686ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4687ac27a0ecSDave Kleikamp return 0; 4688ac27a0ecSDave Kleikamp 4689617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4690b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4691ac27a0ecSDave Kleikamp } 4692ac27a0ecSDave Kleikamp 4693617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4694ac27a0ecSDave Kleikamp { 469514ce0cb4STheodore Ts'o int ret = 0; 46969eddacf9SJan Kara tid_t target; 469706a407f1SDmitry Monakhov bool needs_barrier = false; 46988d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4699ac27a0ecSDave Kleikamp 47009bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 47012e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4702a1177825SJan Kara /* 4703a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4704a1177825SJan Kara * no dirty dquots 4705a1177825SJan Kara */ 4706a1177825SJan Kara dquot_writeback_dquots(sb, -1); 470706a407f1SDmitry Monakhov /* 470806a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 470906a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 471006a407f1SDmitry Monakhov * transaction_commit will do it for us. 471106a407f1SDmitry Monakhov */ 4712bda32530STheodore Ts'o if (sbi->s_journal) { 471306a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 471406a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 471506a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 471606a407f1SDmitry Monakhov needs_barrier = true; 471706a407f1SDmitry Monakhov 47188d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4719ac27a0ecSDave Kleikamp if (wait) 4720bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4721bda32530STheodore Ts'o target); 47220390131bSFrank Mayhar } 4723bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4724bda32530STheodore Ts'o needs_barrier = true; 472506a407f1SDmitry Monakhov if (needs_barrier) { 472606a407f1SDmitry Monakhov int err; 472706a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 472806a407f1SDmitry Monakhov if (!ret) 472906a407f1SDmitry Monakhov ret = err; 473006a407f1SDmitry Monakhov } 473106a407f1SDmitry Monakhov 473206a407f1SDmitry Monakhov return ret; 473306a407f1SDmitry Monakhov } 473406a407f1SDmitry Monakhov 4735ac27a0ecSDave Kleikamp /* 4736ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4737ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4738be4f27d3SYongqiang Yang * 4739be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 47408e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 47418e8ad8a5SJan Kara * modifications. 4742ac27a0ecSDave Kleikamp */ 4743c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4744ac27a0ecSDave Kleikamp { 4745c4be0c1dSTakashi Sato int error = 0; 4746c4be0c1dSTakashi Sato journal_t *journal; 4747ac27a0ecSDave Kleikamp 47489ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47499ca92389STheodore Ts'o return 0; 47509ca92389STheodore Ts'o 4751c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4752ac27a0ecSDave Kleikamp 4753bb044576STheodore Ts'o if (journal) { 4754ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4755dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47567ffe1ea8SHidehiro Kawai 47577ffe1ea8SHidehiro Kawai /* 4758bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4759bb044576STheodore Ts'o * flush the journal. 47607ffe1ea8SHidehiro Kawai */ 4761c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 47626b0310fbSEric Sandeen if (error < 0) 47636b0310fbSEric Sandeen goto out; 4764bb044576STheodore Ts'o } 4765ac27a0ecSDave Kleikamp 4766ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4767617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4768e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 47696b0310fbSEric Sandeen out: 4770bb044576STheodore Ts'o if (journal) 47718e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4772bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 47736b0310fbSEric Sandeen return error; 4774ac27a0ecSDave Kleikamp } 4775ac27a0ecSDave Kleikamp 4776ac27a0ecSDave Kleikamp /* 4777ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4778ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4779ac27a0ecSDave Kleikamp */ 4780c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4781ac27a0ecSDave Kleikamp { 47829ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47839ca92389STheodore Ts'o return 0; 47849ca92389STheodore Ts'o 47859ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4786617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4787e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4788c4be0c1dSTakashi Sato return 0; 4789ac27a0ecSDave Kleikamp } 4790ac27a0ecSDave Kleikamp 4791673c6100STheodore Ts'o /* 4792673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4793673c6100STheodore Ts'o */ 4794673c6100STheodore Ts'o struct ext4_mount_options { 4795673c6100STheodore Ts'o unsigned long s_mount_opt; 4796a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 479708cefc7aSEric W. Biederman kuid_t s_resuid; 479808cefc7aSEric W. Biederman kgid_t s_resgid; 4799673c6100STheodore Ts'o unsigned long s_commit_interval; 4800673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4801673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4802673c6100STheodore Ts'o int s_jquota_fmt; 4803a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4804673c6100STheodore Ts'o #endif 4805673c6100STheodore Ts'o }; 4806673c6100STheodore Ts'o 4807617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4808ac27a0ecSDave Kleikamp { 4809617ba13bSMingming Cao struct ext4_super_block *es; 4810617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4811ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4812617ba13bSMingming Cao struct ext4_mount_options old_opts; 4813c79d967dSChristoph Hellwig int enable_quota = 0; 48148a266467STheodore Ts'o ext4_group_t g; 4815b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4816c5e06d10SJohann Lombardi int err = 0; 4817ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 481803dafb5fSChen Gang int i, j; 4819ac27a0ecSDave Kleikamp #endif 4820d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4821ac27a0ecSDave Kleikamp 4822ac27a0ecSDave Kleikamp /* Store the original options */ 4823ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4824ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4825a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4826ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4827ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4828ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 482930773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 483030773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4831ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4832ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4833a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 483403dafb5fSChen Gang if (sbi->s_qf_names[i]) { 483503dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 483603dafb5fSChen Gang GFP_KERNEL); 483703dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 483803dafb5fSChen Gang for (j = 0; j < i; j++) 483903dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 48403e36a163SWei Yongjun kfree(orig_data); 484103dafb5fSChen Gang return -ENOMEM; 484203dafb5fSChen Gang } 484303dafb5fSChen Gang } else 484403dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4845ac27a0ecSDave Kleikamp #endif 4846b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4847b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4848ac27a0ecSDave Kleikamp 4849ac27a0ecSDave Kleikamp /* 4850ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4851ac27a0ecSDave Kleikamp */ 4852661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4853ac27a0ecSDave Kleikamp err = -EINVAL; 4854ac27a0ecSDave Kleikamp goto restore_opts; 4855ac27a0ecSDave Kleikamp } 4856ac27a0ecSDave Kleikamp 48576b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 48586b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 48596b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 48606b992ff2SDarrick J. Wong "during remount not supported"); 48616b992ff2SDarrick J. Wong err = -EINVAL; 48626b992ff2SDarrick J. Wong goto restore_opts; 48636b992ff2SDarrick J. Wong } 48646b992ff2SDarrick J. Wong 48656ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 48666ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 48676ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48686ae6514bSPiotr Sarna "both data=journal and delalloc"); 48696ae6514bSPiotr Sarna err = -EINVAL; 48706ae6514bSPiotr Sarna goto restore_opts; 48716ae6514bSPiotr Sarna } 48726ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 48736ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48746ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 48756ae6514bSPiotr Sarna err = -EINVAL; 48766ae6514bSPiotr Sarna goto restore_opts; 48776ae6514bSPiotr Sarna } 48786ae6514bSPiotr Sarna } 48796ae6514bSPiotr Sarna 48804ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4881c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4882ac27a0ecSDave Kleikamp 4883ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4884482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4885ac27a0ecSDave Kleikamp 4886ac27a0ecSDave Kleikamp es = sbi->s_es; 4887ac27a0ecSDave Kleikamp 4888b3881f74STheodore Ts'o if (sbi->s_journal) { 4889617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4890b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4891b3881f74STheodore Ts'o } 4892ac27a0ecSDave Kleikamp 4893661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 48944ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4895ac27a0ecSDave Kleikamp err = -EROFS; 4896ac27a0ecSDave Kleikamp goto restore_opts; 4897ac27a0ecSDave Kleikamp } 4898ac27a0ecSDave Kleikamp 4899ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 490038c03b34STheodore Ts'o err = sync_filesystem(sb); 490138c03b34STheodore Ts'o if (err < 0) 490238c03b34STheodore Ts'o goto restore_opts; 49030f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 49040f0dd62fSChristoph Hellwig if (err < 0) 4905c79d967dSChristoph Hellwig goto restore_opts; 4906c79d967dSChristoph Hellwig 4907ac27a0ecSDave Kleikamp /* 4908ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4909ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4910ac27a0ecSDave Kleikamp */ 4911ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4912ac27a0ecSDave Kleikamp 4913ac27a0ecSDave Kleikamp /* 4914ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4915ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4916ac27a0ecSDave Kleikamp * mark the partition as valid again. 4917ac27a0ecSDave Kleikamp */ 4918617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4919617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4920ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4921ac27a0ecSDave Kleikamp 4922a63c9eb2STheodore Ts'o if (sbi->s_journal) 4923617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4924ac27a0ecSDave Kleikamp } else { 4925a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4926a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4927ac27a0ecSDave Kleikamp err = -EROFS; 4928ac27a0ecSDave Kleikamp goto restore_opts; 4929ac27a0ecSDave Kleikamp } 4930ead6596bSEric Sandeen /* 49318a266467STheodore Ts'o * Make sure the group descriptor checksums 49320b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 49338a266467STheodore Ts'o */ 49348a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 49358a266467STheodore Ts'o struct ext4_group_desc *gdp = 49368a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 49378a266467STheodore Ts'o 4938feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4939b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4940b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 49418a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 49428a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 49438a266467STheodore Ts'o err = -EINVAL; 49448a266467STheodore Ts'o goto restore_opts; 49458a266467STheodore Ts'o } 49468a266467STheodore Ts'o } 49478a266467STheodore Ts'o 49488a266467STheodore Ts'o /* 4949ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4950ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4951ead6596bSEric Sandeen * require a full umount/remount for now. 4952ead6596bSEric Sandeen */ 4953ead6596bSEric Sandeen if (es->s_last_orphan) { 4954b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4955ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4956ead6596bSEric Sandeen "orphan inode list. Please " 4957b31e1552SEric Sandeen "umount/remount instead"); 4958ead6596bSEric Sandeen err = -EINVAL; 4959ead6596bSEric Sandeen goto restore_opts; 4960ead6596bSEric Sandeen } 4961ead6596bSEric Sandeen 4962ac27a0ecSDave Kleikamp /* 4963ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4964ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4965ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4966ac27a0ecSDave Kleikamp * the partition.) 4967ac27a0ecSDave Kleikamp */ 49680390131bSFrank Mayhar if (sbi->s_journal) 4969617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4970ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4971617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4972ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4973c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4974c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4975c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4976c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4977c5e06d10SJohann Lombardi err = -EROFS; 4978c5e06d10SJohann Lombardi goto restore_opts; 4979c5e06d10SJohann Lombardi } 4980c79d967dSChristoph Hellwig enable_quota = 1; 4981ac27a0ecSDave Kleikamp } 4982ac27a0ecSDave Kleikamp } 4983bfff6873SLukas Czerner 4984bfff6873SLukas Czerner /* 4985bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4986bfff6873SLukas Czerner * current settings 4987bfff6873SLukas Czerner */ 4988bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4989bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4990bfff6873SLukas Czerner else { 4991bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4992bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4993bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4994bfff6873SLukas Czerner } 4995bfff6873SLukas Czerner 49966fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4997d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 4998e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 49990390131bSFrank Mayhar 5000ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5001ac27a0ecSDave Kleikamp /* Release old quota file names */ 5002a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5003ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 50047c319d32SAditya Kali if (enable_quota) { 50057c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 50060f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 50077c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 50087c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 50097c319d32SAditya Kali err = ext4_enable_quotas(sb); 501007724f98STheodore Ts'o if (err) 50117c319d32SAditya Kali goto restore_opts; 50127c319d32SAditya Kali } 50137c319d32SAditya Kali } 50147c319d32SAditya Kali #endif 5015d4c402d9SCurt Wohlgemuth 5016d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5017d4c402d9SCurt Wohlgemuth kfree(orig_data); 5018ac27a0ecSDave Kleikamp return 0; 50190b8e58a1SAndreas Dilger 5020ac27a0ecSDave Kleikamp restore_opts: 5021ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5022ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5023a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5024ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5025ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5026ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 502730773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 502830773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5029ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5030ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5031a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5032ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5033ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5034ac27a0ecSDave Kleikamp } 5035ac27a0ecSDave Kleikamp #endif 5036d4c402d9SCurt Wohlgemuth kfree(orig_data); 5037ac27a0ecSDave Kleikamp return err; 5038ac27a0ecSDave Kleikamp } 5039ac27a0ecSDave Kleikamp 5040617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5041ac27a0ecSDave Kleikamp { 5042ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5043617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5044617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 504527dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5046960cc398SPekka Enberg u64 fsid; 5047d02a9391SKazuya Mio s64 bfree; 504827dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5049ac27a0ecSDave Kleikamp 5050952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5051952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5052ac27a0ecSDave Kleikamp 5053617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5054ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5055b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 505657042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 505757042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5058d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 505957042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 506027dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 506127dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 506227dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5063ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5064ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 506552d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5066617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5067960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5068960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5069960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5070960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 50710b8e58a1SAndreas Dilger 5072ac27a0ecSDave Kleikamp return 0; 5073ac27a0ecSDave Kleikamp } 5074ac27a0ecSDave Kleikamp 50750b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 50760b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5077ac27a0ecSDave Kleikamp * Process 1 Process 2 5078617ba13bSMingming Cao * ext4_create() quota_sync() 5079dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5080871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5081dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5082ac27a0ecSDave Kleikamp * 5083ac27a0ecSDave Kleikamp */ 5084ac27a0ecSDave Kleikamp 5085ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5086ac27a0ecSDave Kleikamp 5087ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5088ac27a0ecSDave Kleikamp { 50894c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5090ac27a0ecSDave Kleikamp } 5091ac27a0ecSDave Kleikamp 5092617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5093ac27a0ecSDave Kleikamp { 5094ac27a0ecSDave Kleikamp int ret, err; 5095ac27a0ecSDave Kleikamp handle_t *handle; 5096ac27a0ecSDave Kleikamp struct inode *inode; 5097ac27a0ecSDave Kleikamp 5098ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 50999924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5100617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5101ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5102ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5103ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5104617ba13bSMingming Cao err = ext4_journal_stop(handle); 5105ac27a0ecSDave Kleikamp if (!ret) 5106ac27a0ecSDave Kleikamp ret = err; 5107ac27a0ecSDave Kleikamp return ret; 5108ac27a0ecSDave Kleikamp } 5109ac27a0ecSDave Kleikamp 5110617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5111ac27a0ecSDave Kleikamp { 5112ac27a0ecSDave Kleikamp int ret, err; 5113ac27a0ecSDave Kleikamp handle_t *handle; 5114ac27a0ecSDave Kleikamp 51159924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5116617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5117ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5118ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5119ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5120617ba13bSMingming Cao err = ext4_journal_stop(handle); 5121ac27a0ecSDave Kleikamp if (!ret) 5122ac27a0ecSDave Kleikamp ret = err; 5123ac27a0ecSDave Kleikamp return ret; 5124ac27a0ecSDave Kleikamp } 5125ac27a0ecSDave Kleikamp 5126617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5127ac27a0ecSDave Kleikamp { 5128ac27a0ecSDave Kleikamp int ret, err; 5129ac27a0ecSDave Kleikamp handle_t *handle; 5130ac27a0ecSDave Kleikamp 51319924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5132617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 51339c3013e9SJan Kara if (IS_ERR(handle)) { 51349c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 51359c3013e9SJan Kara dquot_release(dquot); 5136ac27a0ecSDave Kleikamp return PTR_ERR(handle); 51379c3013e9SJan Kara } 5138ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5139617ba13bSMingming Cao err = ext4_journal_stop(handle); 5140ac27a0ecSDave Kleikamp if (!ret) 5141ac27a0ecSDave Kleikamp ret = err; 5142ac27a0ecSDave Kleikamp return ret; 5143ac27a0ecSDave Kleikamp } 5144ac27a0ecSDave Kleikamp 5145617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5146ac27a0ecSDave Kleikamp { 5147262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5148262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5149262b4662SJan Kara 51502c8be6b2SJan Kara /* Are we journaling quotas? */ 5151262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 5152262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5153ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5154617ba13bSMingming Cao return ext4_write_dquot(dquot); 5155ac27a0ecSDave Kleikamp } else { 5156ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5157ac27a0ecSDave Kleikamp } 5158ac27a0ecSDave Kleikamp } 5159ac27a0ecSDave Kleikamp 5160617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5161ac27a0ecSDave Kleikamp { 5162ac27a0ecSDave Kleikamp int ret, err; 5163ac27a0ecSDave Kleikamp handle_t *handle; 5164ac27a0ecSDave Kleikamp 5165ac27a0ecSDave Kleikamp /* Data block + inode block */ 51669924a92aSTheodore Ts'o handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); 5167ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5168ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5169ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5170617ba13bSMingming Cao err = ext4_journal_stop(handle); 5171ac27a0ecSDave Kleikamp if (!ret) 5172ac27a0ecSDave Kleikamp ret = err; 5173ac27a0ecSDave Kleikamp return ret; 5174ac27a0ecSDave Kleikamp } 5175ac27a0ecSDave Kleikamp 5176ac27a0ecSDave Kleikamp /* 5177ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5178ac27a0ecSDave Kleikamp * the quota file and such... 5179ac27a0ecSDave Kleikamp */ 5180617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5181ac27a0ecSDave Kleikamp { 5182287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5183617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5184ac27a0ecSDave Kleikamp } 5185ac27a0ecSDave Kleikamp 5186ac27a0ecSDave Kleikamp /* 5187ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5188ac27a0ecSDave Kleikamp */ 5189617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5190f00c9e44SJan Kara struct path *path) 5191ac27a0ecSDave Kleikamp { 5192ac27a0ecSDave Kleikamp int err; 5193ac27a0ecSDave Kleikamp 5194ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5195ac27a0ecSDave Kleikamp return -EINVAL; 51960623543bSJan Kara 5197ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5198d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5199ac27a0ecSDave Kleikamp return -EXDEV; 52000623543bSJan Kara /* Journaling quota? */ 52010623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 52022b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5203f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5204b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5205b31e1552SEric Sandeen "Quota file not on filesystem root. " 5206b31e1552SEric Sandeen "Journaled quota will not work"); 52070623543bSJan Kara } 52080623543bSJan Kara 52090623543bSJan Kara /* 52100623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 52110623543bSJan Kara * all updates to the file when we bypass pagecache... 52120623543bSJan Kara */ 52130390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 5214f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 52150623543bSJan Kara /* 52160623543bSJan Kara * We don't need to lock updates but journal_flush() could 52170623543bSJan Kara * otherwise be livelocked... 52180623543bSJan Kara */ 52190623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 52207ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 52210623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5222f00c9e44SJan Kara if (err) 52237ffe1ea8SHidehiro Kawai return err; 52247ffe1ea8SHidehiro Kawai } 52250623543bSJan Kara 5226f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5227ac27a0ecSDave Kleikamp } 5228ac27a0ecSDave Kleikamp 52297c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 52307c319d32SAditya Kali unsigned int flags) 52317c319d32SAditya Kali { 52327c319d32SAditya Kali int err; 52337c319d32SAditya Kali struct inode *qf_inode; 5234a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52357c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52367c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52377c319d32SAditya Kali }; 52387c319d32SAditya Kali 52397c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 52407c319d32SAditya Kali 52417c319d32SAditya Kali if (!qf_inums[type]) 52427c319d32SAditya Kali return -EPERM; 52437c319d32SAditya Kali 52447c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 52457c319d32SAditya Kali if (IS_ERR(qf_inode)) { 52467c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 52477c319d32SAditya Kali return PTR_ERR(qf_inode); 52487c319d32SAditya Kali } 52497c319d32SAditya Kali 5250bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5251bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 52527c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 52537c319d32SAditya Kali iput(qf_inode); 52547c319d32SAditya Kali 52557c319d32SAditya Kali return err; 52567c319d32SAditya Kali } 52577c319d32SAditya Kali 52587c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 52597c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 52607c319d32SAditya Kali { 52617c319d32SAditya Kali int type, err = 0; 5262a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52637c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52647c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52657c319d32SAditya Kali }; 52667c319d32SAditya Kali 52677c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5268a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 52697c319d32SAditya Kali if (qf_inums[type]) { 52707c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 52717c319d32SAditya Kali DQUOT_USAGE_ENABLED); 52727c319d32SAditya Kali if (err) { 52737c319d32SAditya Kali ext4_warning(sb, 527472ba7450STheodore Ts'o "Failed to enable quota tracking " 527572ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 527672ba7450STheodore Ts'o "e2fsck to fix.", type, err); 52777c319d32SAditya Kali return err; 52787c319d32SAditya Kali } 52797c319d32SAditya Kali } 52807c319d32SAditya Kali } 52817c319d32SAditya Kali return 0; 52827c319d32SAditya Kali } 52837c319d32SAditya Kali 52847c319d32SAditya Kali /* 52857c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 52867c319d32SAditya Kali */ 52877c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 52887c319d32SAditya Kali int format_id) 52897c319d32SAditya Kali { 52907c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 52917c319d32SAditya Kali return -EINVAL; 52927c319d32SAditya Kali 52937c319d32SAditya Kali /* 52947c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 52957c319d32SAditya Kali */ 52967c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 52977c319d32SAditya Kali } 52987c319d32SAditya Kali 5299ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5300ca0e05e4SDmitry Monakhov { 530121f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 530221f97697SJan Kara handle_t *handle; 530321f97697SJan Kara 530487009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 530587009d86SDmitry Monakhov * Caller already holds s_umount sem */ 530687009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5307ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5308ca0e05e4SDmitry Monakhov 53090b268590SAmir Goldstein if (!inode) 53100b268590SAmir Goldstein goto out; 53110b268590SAmir Goldstein 531221f97697SJan Kara /* Update modification times of quota files when userspace can 531321f97697SJan Kara * start looking at them */ 53149924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 531521f97697SJan Kara if (IS_ERR(handle)) 531621f97697SJan Kara goto out; 531721f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 531821f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 531921f97697SJan Kara ext4_journal_stop(handle); 532021f97697SJan Kara 532121f97697SJan Kara out: 5322ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5323ca0e05e4SDmitry Monakhov } 5324ca0e05e4SDmitry Monakhov 53257c319d32SAditya Kali /* 53267c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 53277c319d32SAditya Kali */ 53287c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 53297c319d32SAditya Kali { 53307c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 53317c319d32SAditya Kali return -EINVAL; 53327c319d32SAditya Kali 53337c319d32SAditya Kali /* Disable only the limits. */ 53347c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 53357c319d32SAditya Kali } 53367c319d32SAditya Kali 5337ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5338ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5339ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5340ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5341617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5342ac27a0ecSDave Kleikamp size_t len, loff_t off) 5343ac27a0ecSDave Kleikamp { 5344ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5345725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5346ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5347ac27a0ecSDave Kleikamp int tocopy; 5348ac27a0ecSDave Kleikamp size_t toread; 5349ac27a0ecSDave Kleikamp struct buffer_head *bh; 5350ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5351ac27a0ecSDave Kleikamp 5352ac27a0ecSDave Kleikamp if (off > i_size) 5353ac27a0ecSDave Kleikamp return 0; 5354ac27a0ecSDave Kleikamp if (off+len > i_size) 5355ac27a0ecSDave Kleikamp len = i_size-off; 5356ac27a0ecSDave Kleikamp toread = len; 5357ac27a0ecSDave Kleikamp while (toread > 0) { 5358ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5359ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 53601c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 53611c215028STheodore Ts'o if (IS_ERR(bh)) 53621c215028STheodore Ts'o return PTR_ERR(bh); 5363ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5364ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5365ac27a0ecSDave Kleikamp else 5366ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5367ac27a0ecSDave Kleikamp brelse(bh); 5368ac27a0ecSDave Kleikamp offset = 0; 5369ac27a0ecSDave Kleikamp toread -= tocopy; 5370ac27a0ecSDave Kleikamp data += tocopy; 5371ac27a0ecSDave Kleikamp blk++; 5372ac27a0ecSDave Kleikamp } 5373ac27a0ecSDave Kleikamp return len; 5374ac27a0ecSDave Kleikamp } 5375ac27a0ecSDave Kleikamp 5376ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5377ac27a0ecSDave Kleikamp * enough credits) */ 5378617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5379ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5380ac27a0ecSDave Kleikamp { 5381ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5382725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 53831c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5384ac27a0ecSDave Kleikamp struct buffer_head *bh; 5385ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5386ac27a0ecSDave Kleikamp 53870390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5388b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5389b31e1552SEric Sandeen " cancelled because transaction is not started", 53909c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 53919c3013e9SJan Kara return -EIO; 53929c3013e9SJan Kara } 539367eeb568SDmitry Monakhov /* 539467eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 539567eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 539667eeb568SDmitry Monakhov */ 539767eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 539867eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 539967eeb568SDmitry Monakhov " cancelled because not block aligned", 540067eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 540167eeb568SDmitry Monakhov return -EIO; 540267eeb568SDmitry Monakhov } 540367eeb568SDmitry Monakhov 54041c215028STheodore Ts'o bh = ext4_bread(handle, inode, blk, 1); 54051c215028STheodore Ts'o if (IS_ERR(bh)) 54061c215028STheodore Ts'o return PTR_ERR(bh); 5407ac27a0ecSDave Kleikamp if (!bh) 5408ac27a0ecSDave Kleikamp goto out; 54095d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5410617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5411ac27a0ecSDave Kleikamp if (err) { 5412ac27a0ecSDave Kleikamp brelse(bh); 54131c215028STheodore Ts'o return err; 5414ac27a0ecSDave Kleikamp } 5415ac27a0ecSDave Kleikamp lock_buffer(bh); 541667eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5417ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5418ac27a0ecSDave Kleikamp unlock_buffer(bh); 54190390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5420ac27a0ecSDave Kleikamp brelse(bh); 5421ac27a0ecSDave Kleikamp out: 542267eeb568SDmitry Monakhov if (inode->i_size < off + len) { 542367eeb568SDmitry Monakhov i_size_write(inode, off + len); 5424617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5425617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 542621f97697SJan Kara } 542767eeb568SDmitry Monakhov return len; 5428ac27a0ecSDave Kleikamp } 5429ac27a0ecSDave Kleikamp 5430ac27a0ecSDave Kleikamp #endif 5431ac27a0ecSDave Kleikamp 5432152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5433152a0836SAl Viro const char *dev_name, void *data) 5434ac27a0ecSDave Kleikamp { 5435152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5436ac27a0ecSDave Kleikamp } 5437ac27a0ecSDave Kleikamp 543837f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 543924b58424STheodore Ts'o static inline void register_as_ext2(void) 544024b58424STheodore Ts'o { 544124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 544224b58424STheodore Ts'o if (err) 544324b58424STheodore Ts'o printk(KERN_WARNING 544424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 544524b58424STheodore Ts'o } 544624b58424STheodore Ts'o 544724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 544824b58424STheodore Ts'o { 544924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 545024b58424STheodore Ts'o } 54512035e776STheodore Ts'o 54522035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 54532035e776STheodore Ts'o { 54542035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 54552035e776STheodore Ts'o return 0; 54562035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54572035e776STheodore Ts'o return 1; 54582035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 54592035e776STheodore Ts'o return 0; 54602035e776STheodore Ts'o return 1; 54612035e776STheodore Ts'o } 546224b58424STheodore Ts'o #else 546324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 546424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 54652035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 546624b58424STheodore Ts'o #endif 546724b58424STheodore Ts'o 546837f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 546924b58424STheodore Ts'o static inline void register_as_ext3(void) 547024b58424STheodore Ts'o { 547124b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 547224b58424STheodore Ts'o if (err) 547324b58424STheodore Ts'o printk(KERN_WARNING 547424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 547524b58424STheodore Ts'o } 547624b58424STheodore Ts'o 547724b58424STheodore Ts'o static inline void unregister_as_ext3(void) 547824b58424STheodore Ts'o { 547924b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 548024b58424STheodore Ts'o } 54812035e776STheodore Ts'o 54822035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 54832035e776STheodore Ts'o { 54842035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 54852035e776STheodore Ts'o return 0; 54862035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 54872035e776STheodore Ts'o return 0; 54882035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54892035e776STheodore Ts'o return 1; 54902035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 54912035e776STheodore Ts'o return 0; 54922035e776STheodore Ts'o return 1; 54932035e776STheodore Ts'o } 549424b58424STheodore Ts'o #else 549524b58424STheodore Ts'o static inline void register_as_ext3(void) { } 549624b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 54972035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 549824b58424STheodore Ts'o #endif 549924b58424STheodore Ts'o 550003010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5501ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 550203010a33STheodore Ts'o .name = "ext4", 5503152a0836SAl Viro .mount = ext4_mount, 5504ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5505ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5506ac27a0ecSDave Kleikamp }; 55077f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5508ac27a0ecSDave Kleikamp 55098f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5510857ac889SLukas Czerner { 5511857ac889SLukas Czerner struct ext4_features *ef; 5512857ac889SLukas Czerner int ret = -ENOMEM; 5513857ac889SLukas Czerner 5514857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5515857ac889SLukas Czerner if (!ef) 5516857ac889SLukas Czerner goto out; 5517857ac889SLukas Czerner 5518857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5519857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5520857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5521857ac889SLukas Czerner "features"); 5522857ac889SLukas Czerner if (ret) { 5523857ac889SLukas Czerner kfree(ef); 5524857ac889SLukas Czerner goto out; 5525857ac889SLukas Czerner } 5526857ac889SLukas Czerner 5527857ac889SLukas Czerner ext4_feat = ef; 5528857ac889SLukas Czerner ret = 0; 5529857ac889SLukas Czerner out: 5530857ac889SLukas Czerner return ret; 5531857ac889SLukas Czerner } 5532857ac889SLukas Czerner 55338f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 55348f021222SLukas Czerner { 55358f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 55368f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 55378f021222SLukas Czerner kfree(ext4_feat); 55388f021222SLukas Czerner } 55398f021222SLukas Czerner 5540e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5541e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5542e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5543e9e3bcecSEric Sandeen 55445dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5545ac27a0ecSDave Kleikamp { 5546e9e3bcecSEric Sandeen int i, err; 5547c9de560dSAlex Tomas 554807c0c5d8SAl Viro ext4_li_info = NULL; 554907c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 555007c0c5d8SAl Viro 55519a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 555212e9b892SDmitry Monakhov ext4_check_flag_values(); 5553e9e3bcecSEric Sandeen 5554e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5555e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5556e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5557e9e3bcecSEric Sandeen } 5558e9e3bcecSEric Sandeen 555951865fdaSZheng Liu err = ext4_init_es(); 55606fd058f7STheodore Ts'o if (err) 55616fd058f7STheodore Ts'o return err; 556251865fdaSZheng Liu 556351865fdaSZheng Liu err = ext4_init_pageio(); 556451865fdaSZheng Liu if (err) 556551865fdaSZheng Liu goto out7; 556651865fdaSZheng Liu 55675dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5568bd2d0210STheodore Ts'o if (err) 5569d44651d0SFabrice Jouhaud goto out6; 55703197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 55710e376b1eSTheodore Ts'o if (!ext4_kset) { 55720e376b1eSTheodore Ts'o err = -ENOMEM; 5573dd68314cSTheodore Ts'o goto out5; 55740e376b1eSTheodore Ts'o } 5575d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5576857ac889SLukas Czerner 5577857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5578dd68314cSTheodore Ts'o if (err) 5579dd68314cSTheodore Ts'o goto out4; 5580857ac889SLukas Czerner 55815dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5582ac27a0ecSDave Kleikamp if (err) 5583c9de560dSAlex Tomas goto out2; 55849c191f70ST Makphaibulchoke else 55859c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5586ac27a0ecSDave Kleikamp err = init_inodecache(); 5587ac27a0ecSDave Kleikamp if (err) 5588ac27a0ecSDave Kleikamp goto out1; 558924b58424STheodore Ts'o register_as_ext3(); 55902035e776STheodore Ts'o register_as_ext2(); 559103010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5592ac27a0ecSDave Kleikamp if (err) 5593ac27a0ecSDave Kleikamp goto out; 5594bfff6873SLukas Czerner 5595ac27a0ecSDave Kleikamp return 0; 5596ac27a0ecSDave Kleikamp out: 559724b58424STheodore Ts'o unregister_as_ext2(); 559824b58424STheodore Ts'o unregister_as_ext3(); 5599ac27a0ecSDave Kleikamp destroy_inodecache(); 5600ac27a0ecSDave Kleikamp out1: 56019c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 56025dabfc78STheodore Ts'o ext4_exit_mballoc(); 56039c191f70ST Makphaibulchoke out2: 56048f021222SLukas Czerner ext4_exit_feat_adverts(); 56056fd058f7STheodore Ts'o out4: 5606d44651d0SFabrice Jouhaud if (ext4_proc_root) 5607dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5608dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5609d44651d0SFabrice Jouhaud out5: 5610dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5611d44651d0SFabrice Jouhaud out6: 56125dabfc78STheodore Ts'o ext4_exit_pageio(); 561351865fdaSZheng Liu out7: 561451865fdaSZheng Liu ext4_exit_es(); 561551865fdaSZheng Liu 5616ac27a0ecSDave Kleikamp return err; 5617ac27a0ecSDave Kleikamp } 5618ac27a0ecSDave Kleikamp 56195dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5620ac27a0ecSDave Kleikamp { 5621bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 562224b58424STheodore Ts'o unregister_as_ext2(); 562324b58424STheodore Ts'o unregister_as_ext3(); 562403010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5625ac27a0ecSDave Kleikamp destroy_inodecache(); 56265dabfc78STheodore Ts'o ext4_exit_mballoc(); 56278f021222SLukas Czerner ext4_exit_feat_adverts(); 56289f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 56293197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 56305dabfc78STheodore Ts'o ext4_exit_system_zone(); 56315dabfc78STheodore Ts'o ext4_exit_pageio(); 5632dd12ed14SEric Sandeen ext4_exit_es(); 5633ac27a0ecSDave Kleikamp } 5634ac27a0ecSDave Kleikamp 5635ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 563683982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5637ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 56385dabfc78STheodore Ts'o module_init(ext4_init_fs) 56395dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5640