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 1798fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1808fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 181bd81d8eeSLaurent Vivier { 1823a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1838fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1848fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 185bd81d8eeSLaurent Vivier } 186bd81d8eeSLaurent Vivier 1878fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1888fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 189bd81d8eeSLaurent Vivier { 1905272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1918fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1928fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 193bd81d8eeSLaurent Vivier } 194bd81d8eeSLaurent Vivier 1958fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1968fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 197bd81d8eeSLaurent Vivier { 1985272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1998fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2008fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 201bd81d8eeSLaurent Vivier } 202bd81d8eeSLaurent Vivier 203021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 204560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 205560671a0SAneesh Kumar K.V { 206560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 207560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 208560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 209560671a0SAneesh Kumar K.V } 210560671a0SAneesh Kumar K.V 211560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 212560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 213560671a0SAneesh Kumar K.V { 214560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 215560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 216560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 217560671a0SAneesh Kumar K.V } 218560671a0SAneesh Kumar K.V 219560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 220560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 221560671a0SAneesh Kumar K.V { 222560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 223560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 224560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 225560671a0SAneesh Kumar K.V } 226560671a0SAneesh Kumar K.V 227560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 228560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 229560671a0SAneesh Kumar K.V { 230560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 231560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 232560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 233560671a0SAneesh Kumar K.V } 234560671a0SAneesh Kumar K.V 2358fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2368fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 237bd81d8eeSLaurent Vivier { 2383a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2398fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2408fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 241bd81d8eeSLaurent Vivier } 242bd81d8eeSLaurent Vivier 2438fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2448fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 245bd81d8eeSLaurent Vivier { 2465272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2478fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2488fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 249bd81d8eeSLaurent Vivier } 250bd81d8eeSLaurent Vivier 2518fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2528fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 253bd81d8eeSLaurent Vivier { 2545272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2558fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2568fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 257bd81d8eeSLaurent Vivier } 258bd81d8eeSLaurent Vivier 259021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 260560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 261560671a0SAneesh Kumar K.V { 262560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 263560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 264560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 265560671a0SAneesh Kumar K.V } 266560671a0SAneesh Kumar K.V 267560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 268560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 269560671a0SAneesh Kumar K.V { 270560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 271560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 272560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 273560671a0SAneesh Kumar K.V } 274560671a0SAneesh Kumar K.V 275560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 276560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 277560671a0SAneesh Kumar K.V { 278560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 279560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 280560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 281560671a0SAneesh Kumar K.V } 282560671a0SAneesh Kumar K.V 283560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 284560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 285560671a0SAneesh Kumar K.V { 286560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 287560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 288560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 289560671a0SAneesh Kumar K.V } 290560671a0SAneesh Kumar K.V 291d3d1faf6SCurt Wohlgemuth 2921c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 2931c13d5c0STheodore Ts'o unsigned int line) 2941c13d5c0STheodore Ts'o { 2951c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 2961c13d5c0STheodore Ts'o 2971c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2981c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2991c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3001c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3011c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3021c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3031c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3041c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3051c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3061c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3071c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3081c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3091c13d5c0STheodore Ts'o } 31066e61a9eSTheodore Ts'o /* 31166e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 31266e61a9eSTheodore Ts'o * started already 31366e61a9eSTheodore Ts'o */ 31466e61a9eSTheodore Ts'o if (!es->s_error_count) 31566e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 316ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3171c13d5c0STheodore Ts'o } 3181c13d5c0STheodore Ts'o 3191c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3201c13d5c0STheodore Ts'o unsigned int line) 3211c13d5c0STheodore Ts'o { 3221c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3231c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3241c13d5c0STheodore Ts'o } 3251c13d5c0STheodore Ts'o 3267c2e7087STheodore Ts'o /* 3277c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 3287c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 3297c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 3307c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 3317c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 3327c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 3337c2e7087STheodore Ts'o */ 3347c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 3357c2e7087STheodore Ts'o { 3367c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 3377c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 3387c2e7087STheodore Ts'o 3397c2e7087STheodore Ts'o return bdi->dev == NULL; 3407c2e7087STheodore Ts'o } 3417c2e7087STheodore Ts'o 34218aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 34318aadd47SBobi Jam { 34418aadd47SBobi Jam struct super_block *sb = journal->j_private; 34518aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 34618aadd47SBobi Jam int error = is_journal_aborted(journal); 3475d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 34818aadd47SBobi Jam 3495d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 35018aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3515d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3525d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3535d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 35418aadd47SBobi Jam list_del_init(&jce->jce_list); 35518aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 35618aadd47SBobi Jam jce->jce_func(sb, jce, error); 35718aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 35818aadd47SBobi Jam } 35918aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 36018aadd47SBobi Jam } 3611c13d5c0STheodore Ts'o 362ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 363ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 364ac27a0ecSDave Kleikamp * 365ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 366617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 367ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 368ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 369ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 370ac27a0ecSDave Kleikamp * write out the superblock safely. 371ac27a0ecSDave Kleikamp * 372dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 373d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 374ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 375ac27a0ecSDave Kleikamp */ 376ac27a0ecSDave Kleikamp 377617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 378ac27a0ecSDave Kleikamp { 379ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 380ac27a0ecSDave Kleikamp return; 381ac27a0ecSDave Kleikamp 382ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 383617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 384ac27a0ecSDave Kleikamp 3854ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 386ac27a0ecSDave Kleikamp if (journal) 387dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 388ac27a0ecSDave Kleikamp } 389ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 390b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 3914418e141SDmitry Monakhov /* 3924418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 3934418e141SDmitry Monakhov * before ->s_flags update 3944418e141SDmitry Monakhov */ 3954418e141SDmitry Monakhov smp_wmb(); 396ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 397ac27a0ecSDave Kleikamp } 398ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 399617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 400ac27a0ecSDave Kleikamp sb->s_id); 401ac27a0ecSDave Kleikamp } 402ac27a0ecSDave Kleikamp 403efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 404efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 405efbed4dcSTheodore Ts'o "EXT4-fs error") 406efbed4dcSTheodore Ts'o 40712062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 408c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 409ac27a0ecSDave Kleikamp { 4100ff2ea7dSJoe Perches struct va_format vaf; 411ac27a0ecSDave Kleikamp va_list args; 412ac27a0ecSDave Kleikamp 413efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 414ac27a0ecSDave Kleikamp va_start(args, fmt); 4150ff2ea7dSJoe Perches vaf.fmt = fmt; 4160ff2ea7dSJoe Perches vaf.va = &args; 417efbed4dcSTheodore Ts'o printk(KERN_CRIT 418efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4190ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 420ac27a0ecSDave Kleikamp va_end(args); 421efbed4dcSTheodore Ts'o } 422f3fc0210STheodore Ts'o save_error_info(sb, function, line); 423617ba13bSMingming Cao ext4_handle_error(sb); 424ac27a0ecSDave Kleikamp } 425ac27a0ecSDave Kleikamp 426e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 427c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 428273df556SFrank Mayhar const char *fmt, ...) 429273df556SFrank Mayhar { 430273df556SFrank Mayhar va_list args; 431f7c21177STheodore Ts'o struct va_format vaf; 4321c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 433273df556SFrank Mayhar 4341c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4351c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 436efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 437273df556SFrank Mayhar va_start(args, fmt); 438f7c21177STheodore Ts'o vaf.fmt = fmt; 439f7c21177STheodore Ts'o vaf.va = &args; 440c398eda0STheodore Ts'o if (block) 441d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 442d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 443d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 444d9ee81daSJoe Perches block, current->comm, &vaf); 445d9ee81daSJoe Perches else 446d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 447d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 448d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 449d9ee81daSJoe Perches current->comm, &vaf); 450273df556SFrank Mayhar va_end(args); 451efbed4dcSTheodore Ts'o } 452efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 453273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 454273df556SFrank Mayhar } 455273df556SFrank Mayhar 456e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 457f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 458f7c21177STheodore Ts'o const char *fmt, ...) 459273df556SFrank Mayhar { 460273df556SFrank Mayhar va_list args; 461f7c21177STheodore Ts'o struct va_format vaf; 4621c13d5c0STheodore Ts'o struct ext4_super_block *es; 463496ad9aaSAl Viro struct inode *inode = file_inode(file); 464273df556SFrank Mayhar char pathname[80], *path; 465273df556SFrank Mayhar 4661c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4671c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 468efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 469273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 470f9a62d09SDan Carpenter if (IS_ERR(path)) 471273df556SFrank Mayhar path = "(unknown)"; 472f7c21177STheodore Ts'o va_start(args, fmt); 473f7c21177STheodore Ts'o vaf.fmt = fmt; 474f7c21177STheodore Ts'o vaf.va = &args; 475d9ee81daSJoe Perches if (block) 476d9ee81daSJoe Perches printk(KERN_CRIT 477d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 478d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 479d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 480d9ee81daSJoe Perches block, current->comm, path, &vaf); 481d9ee81daSJoe Perches else 482d9ee81daSJoe Perches printk(KERN_CRIT 483d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 484d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 485d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 486d9ee81daSJoe Perches current->comm, path, &vaf); 487273df556SFrank Mayhar va_end(args); 488efbed4dcSTheodore Ts'o } 489efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 490273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 491273df556SFrank Mayhar } 492273df556SFrank Mayhar 493722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 494ac27a0ecSDave Kleikamp char nbuf[16]) 495ac27a0ecSDave Kleikamp { 496ac27a0ecSDave Kleikamp char *errstr = NULL; 497ac27a0ecSDave Kleikamp 498ac27a0ecSDave Kleikamp switch (errno) { 499ac27a0ecSDave Kleikamp case -EIO: 500ac27a0ecSDave Kleikamp errstr = "IO failure"; 501ac27a0ecSDave Kleikamp break; 502ac27a0ecSDave Kleikamp case -ENOMEM: 503ac27a0ecSDave Kleikamp errstr = "Out of memory"; 504ac27a0ecSDave Kleikamp break; 505ac27a0ecSDave Kleikamp case -EROFS: 50678f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 50778f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 508ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 509ac27a0ecSDave Kleikamp else 510ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 511ac27a0ecSDave Kleikamp break; 512ac27a0ecSDave Kleikamp default: 513ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 514ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 515ac27a0ecSDave Kleikamp * NULL. */ 516ac27a0ecSDave Kleikamp if (nbuf) { 517ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 518ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 519ac27a0ecSDave Kleikamp errstr = nbuf; 520ac27a0ecSDave Kleikamp } 521ac27a0ecSDave Kleikamp break; 522ac27a0ecSDave Kleikamp } 523ac27a0ecSDave Kleikamp 524ac27a0ecSDave Kleikamp return errstr; 525ac27a0ecSDave Kleikamp } 526ac27a0ecSDave Kleikamp 527617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 528ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 529ac27a0ecSDave Kleikamp 530c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 531c398eda0STheodore Ts'o unsigned int line, int errno) 532ac27a0ecSDave Kleikamp { 533ac27a0ecSDave Kleikamp char nbuf[16]; 534ac27a0ecSDave Kleikamp const char *errstr; 535ac27a0ecSDave Kleikamp 536ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 537ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 538ac27a0ecSDave Kleikamp * an error. */ 539ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 540ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 541ac27a0ecSDave Kleikamp return; 542ac27a0ecSDave Kleikamp 543efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 544617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 545c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 546c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 547efbed4dcSTheodore Ts'o } 548ac27a0ecSDave Kleikamp 549efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 550617ba13bSMingming Cao ext4_handle_error(sb); 551ac27a0ecSDave Kleikamp } 552ac27a0ecSDave Kleikamp 553ac27a0ecSDave Kleikamp /* 554617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 555ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 556ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 557ac27a0ecSDave Kleikamp * 558ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 559ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 560ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 561ac27a0ecSDave Kleikamp */ 562ac27a0ecSDave Kleikamp 563c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 564c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 565ac27a0ecSDave Kleikamp { 566ac27a0ecSDave Kleikamp va_list args; 567ac27a0ecSDave Kleikamp 5681c13d5c0STheodore Ts'o save_error_info(sb, function, line); 569ac27a0ecSDave Kleikamp va_start(args, fmt); 570c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 571c398eda0STheodore Ts'o function, line); 572ac27a0ecSDave Kleikamp vprintk(fmt, args); 573ac27a0ecSDave Kleikamp printk("\n"); 574ac27a0ecSDave Kleikamp va_end(args); 575ac27a0ecSDave Kleikamp 5761c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 577b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 5784ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 5794418e141SDmitry Monakhov /* 5804418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 5814418e141SDmitry Monakhov * before ->s_flags update 5824418e141SDmitry Monakhov */ 5834418e141SDmitry Monakhov smp_wmb(); 5844418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 585ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 586dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5871c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5881c13d5c0STheodore Ts'o } 5891c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5901c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 591ac27a0ecSDave Kleikamp } 592ac27a0ecSDave Kleikamp 593e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 594e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 595b31e1552SEric Sandeen { 5960ff2ea7dSJoe Perches struct va_format vaf; 597b31e1552SEric Sandeen va_list args; 598b31e1552SEric Sandeen 599efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 600efbed4dcSTheodore Ts'o return; 601efbed4dcSTheodore Ts'o 602b31e1552SEric Sandeen va_start(args, fmt); 6030ff2ea7dSJoe Perches vaf.fmt = fmt; 6040ff2ea7dSJoe Perches vaf.va = &args; 6050ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 606b31e1552SEric Sandeen va_end(args); 607b31e1552SEric Sandeen } 608b31e1552SEric Sandeen 60912062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 610c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 611ac27a0ecSDave Kleikamp { 6120ff2ea7dSJoe Perches struct va_format vaf; 613ac27a0ecSDave Kleikamp va_list args; 614ac27a0ecSDave Kleikamp 615efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 616efbed4dcSTheodore Ts'o "EXT4-fs warning")) 617efbed4dcSTheodore Ts'o return; 618efbed4dcSTheodore Ts'o 619ac27a0ecSDave Kleikamp va_start(args, fmt); 6200ff2ea7dSJoe Perches vaf.fmt = fmt; 6210ff2ea7dSJoe Perches vaf.va = &args; 6220ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6230ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 624ac27a0ecSDave Kleikamp va_end(args); 625ac27a0ecSDave Kleikamp } 626ac27a0ecSDave Kleikamp 627e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 628e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 629e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 630e29136f8STheodore Ts'o const char *fmt, ...) 6315d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6325d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6335d1b1b3fSAneesh Kumar K.V { 6340ff2ea7dSJoe Perches struct va_format vaf; 6355d1b1b3fSAneesh Kumar K.V va_list args; 6365d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6375d1b1b3fSAneesh Kumar K.V 6381c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6391c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6401c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6410ff2ea7dSJoe Perches 642efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 6435d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6440ff2ea7dSJoe Perches vaf.fmt = fmt; 6450ff2ea7dSJoe Perches vaf.va = &args; 64621149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 647e29136f8STheodore Ts'o sb->s_id, function, line, grp); 648e29136f8STheodore Ts'o if (ino) 6490ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 650e29136f8STheodore Ts'o if (block) 651efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 652efbed4dcSTheodore Ts'o (unsigned long long) block); 6530ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6545d1b1b3fSAneesh Kumar K.V va_end(args); 655efbed4dcSTheodore Ts'o } 6565d1b1b3fSAneesh Kumar K.V 6575d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 658e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6595d1b1b3fSAneesh Kumar K.V return; 6605d1b1b3fSAneesh Kumar K.V } 6611c13d5c0STheodore Ts'o 6625d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6635d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6645d1b1b3fSAneesh Kumar K.V /* 6655d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6665d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6675d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6685d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6695d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 67025985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 6715d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6725d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6735d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6745d1b1b3fSAneesh Kumar K.V */ 6755d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6765d1b1b3fSAneesh Kumar K.V return; 6775d1b1b3fSAneesh Kumar K.V } 6785d1b1b3fSAneesh Kumar K.V 679617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 680ac27a0ecSDave Kleikamp { 681617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 682ac27a0ecSDave Kleikamp 683617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 684ac27a0ecSDave Kleikamp return; 685ac27a0ecSDave Kleikamp 68612062dddSEric Sandeen ext4_warning(sb, 687ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 688ac27a0ecSDave Kleikamp "running e2fsck is recommended", 689617ba13bSMingming Cao EXT4_DYNAMIC_REV); 690ac27a0ecSDave Kleikamp 691617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 692617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 693617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 694ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 695ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 696ac27a0ecSDave Kleikamp 697ac27a0ecSDave Kleikamp /* 698ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 699ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 700ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 701ac27a0ecSDave Kleikamp */ 702ac27a0ecSDave Kleikamp } 703ac27a0ecSDave Kleikamp 704ac27a0ecSDave Kleikamp /* 705ac27a0ecSDave Kleikamp * Open the external journal device 706ac27a0ecSDave Kleikamp */ 707b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 708ac27a0ecSDave Kleikamp { 709ac27a0ecSDave Kleikamp struct block_device *bdev; 710ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 711ac27a0ecSDave Kleikamp 712d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 713ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 714ac27a0ecSDave Kleikamp goto fail; 715ac27a0ecSDave Kleikamp return bdev; 716ac27a0ecSDave Kleikamp 717ac27a0ecSDave Kleikamp fail: 718b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 719ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 720ac27a0ecSDave Kleikamp return NULL; 721ac27a0ecSDave Kleikamp } 722ac27a0ecSDave Kleikamp 723ac27a0ecSDave Kleikamp /* 724ac27a0ecSDave Kleikamp * Release the journal device 725ac27a0ecSDave Kleikamp */ 7264385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 727ac27a0ecSDave Kleikamp { 7284385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 729ac27a0ecSDave Kleikamp } 730ac27a0ecSDave Kleikamp 7314385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 732ac27a0ecSDave Kleikamp { 733ac27a0ecSDave Kleikamp struct block_device *bdev; 734ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 735ac27a0ecSDave Kleikamp if (bdev) { 7364385bab1SAl Viro ext4_blkdev_put(bdev); 737ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 738ac27a0ecSDave Kleikamp } 739ac27a0ecSDave Kleikamp } 740ac27a0ecSDave Kleikamp 741ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 742ac27a0ecSDave Kleikamp { 743617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 744ac27a0ecSDave Kleikamp } 745ac27a0ecSDave Kleikamp 746617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 747ac27a0ecSDave Kleikamp { 748ac27a0ecSDave Kleikamp struct list_head *l; 749ac27a0ecSDave Kleikamp 750b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 751ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 752ac27a0ecSDave Kleikamp 753ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 754ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 755ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 756ac27a0ecSDave Kleikamp printk(KERN_ERR " " 757ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 758ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 759ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 760ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 761ac27a0ecSDave Kleikamp } 762ac27a0ecSDave Kleikamp } 763ac27a0ecSDave Kleikamp 764617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 765ac27a0ecSDave Kleikamp { 766617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 767617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 768ef2cabf7SHidehiro Kawai int i, err; 769ac27a0ecSDave Kleikamp 770857ac889SLukas Czerner ext4_unregister_li_request(sb); 771e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 772e0ccfd95SChristoph Hellwig 7732e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 7742e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 7754c0425ffSMingming Cao 7760390131bSFrank Mayhar if (sbi->s_journal) { 777ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 77847b4a50bSJan Kara sbi->s_journal = NULL; 779ef2cabf7SHidehiro Kawai if (err < 0) 780c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7810390131bSFrank Mayhar } 782d4edac31SJosef Bacik 783d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 7849105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 785d4edac31SJosef Bacik ext4_release_system_zone(sb); 786d4edac31SJosef Bacik ext4_mb_release(sb); 787d4edac31SJosef Bacik ext4_ext_release(sb); 788d4edac31SJosef Bacik ext4_xattr_put_super(sb); 789d4edac31SJosef Bacik 790ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 791617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 792ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 793ac27a0ecSDave Kleikamp } 79458c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 795a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 796a8e25a83SArtem Bityutskiy 797240799cdSTheodore Ts'o if (sbi->s_proc) { 79866acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 7999f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 800240799cdSTheodore Ts'o } 8013197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 802ac27a0ecSDave Kleikamp 803ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 804ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 805*b93b41d4SAl Viro kvfree(sbi->s_group_desc); 806*b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 80757042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 808ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 809ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 81057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 811ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 812ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 813a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 814ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 815ac27a0ecSDave Kleikamp #endif 816ac27a0ecSDave Kleikamp 817ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 818ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 819ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 820ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 821ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 822ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 823ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 824ac27a0ecSDave Kleikamp 825f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 826ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 827ac27a0ecSDave Kleikamp /* 828ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 829ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 830ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 831ac27a0ecSDave Kleikamp */ 832ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 833f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 834617ba13bSMingming Cao ext4_blkdev_remove(sbi); 835ac27a0ecSDave Kleikamp } 8369c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 8379c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 8389c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 8399c191f70ST Makphaibulchoke } 840c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 841c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 842ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8433197ebdbSTheodore Ts'o /* 8443197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8453197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8463197ebdbSTheodore Ts'o */ 8473197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8483197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 8490441984aSDarrick J. Wong if (sbi->s_chksum_driver) 8500441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 851705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 852ac27a0ecSDave Kleikamp kfree(sbi); 853ac27a0ecSDave Kleikamp } 854ac27a0ecSDave Kleikamp 855e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 856ac27a0ecSDave Kleikamp 857ac27a0ecSDave Kleikamp /* 858ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 859ac27a0ecSDave Kleikamp */ 860617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 861ac27a0ecSDave Kleikamp { 862617ba13bSMingming Cao struct ext4_inode_info *ei; 863ac27a0ecSDave Kleikamp 864e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 865ac27a0ecSDave Kleikamp if (!ei) 866ac27a0ecSDave Kleikamp return NULL; 8670b8e58a1SAndreas Dilger 868ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 869202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 870c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 871c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8729a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 8739a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 87474cd15cdSZheng Liu INIT_LIST_HEAD(&ei->i_es_lru); 875eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 87674cd15cdSZheng Liu ei->i_es_lru_nr = 0; 877d3922a77SZheng Liu ei->i_touch_when = 0; 878d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 879d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 880d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8819d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 8827e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 883d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 884a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 885a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 886a9e7f447SDmitry Monakhov #endif 8878aefcd55STheodore Ts'o ei->jinode = NULL; 8882e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 889744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 890b436b9beSJan Kara ei->i_sync_tid = 0; 891b436b9beSJan Kara ei->i_datasync_tid = 0; 892f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 893e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 8942e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 8950b8e58a1SAndreas Dilger 896ac27a0ecSDave Kleikamp return &ei->vfs_inode; 897ac27a0ecSDave Kleikamp } 898ac27a0ecSDave Kleikamp 8997ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9007ff9c073STheodore Ts'o { 9017ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9027ff9c073STheodore Ts'o 9037ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9047ff9c073STheodore Ts'o return drop; 9057ff9c073STheodore Ts'o } 9067ff9c073STheodore Ts'o 907fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 908fa0d7e3dSNick Piggin { 909fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 910fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 911fa0d7e3dSNick Piggin } 912fa0d7e3dSNick Piggin 913617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 914ac27a0ecSDave Kleikamp { 9159f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 916b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 917b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 918b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9199f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9209f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9219f7dd93dSVasily Averin true); 9229f7dd93dSVasily Averin dump_stack(); 9239f7dd93dSVasily Averin } 924fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 925ac27a0ecSDave Kleikamp } 926ac27a0ecSDave Kleikamp 92751cc5068SAlexey Dobriyan static void init_once(void *foo) 928ac27a0ecSDave Kleikamp { 929617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 930ac27a0ecSDave Kleikamp 931ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 932ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9330e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 934ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 935ac27a0ecSDave Kleikamp } 936ac27a0ecSDave Kleikamp 937e67bc2b3SFabian Frederick static int __init init_inodecache(void) 938ac27a0ecSDave Kleikamp { 939617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 940617ba13bSMingming Cao sizeof(struct ext4_inode_info), 941ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 942ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 94320c2df83SPaul Mundt init_once); 944617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 945ac27a0ecSDave Kleikamp return -ENOMEM; 946ac27a0ecSDave Kleikamp return 0; 947ac27a0ecSDave Kleikamp } 948ac27a0ecSDave Kleikamp 949ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 950ac27a0ecSDave Kleikamp { 9518c0a8537SKirill A. Shutemov /* 9528c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 9538c0a8537SKirill A. Shutemov * destroy cache. 9548c0a8537SKirill A. Shutemov */ 9558c0a8537SKirill A. Shutemov rcu_barrier(); 956617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 957ac27a0ecSDave Kleikamp } 958ac27a0ecSDave Kleikamp 9590930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 960ac27a0ecSDave Kleikamp { 9610930fcc1SAl Viro invalidate_inode_buffers(inode); 962dbd5768fSJan Kara clear_inode(inode); 9639f754758SChristoph Hellwig dquot_drop(inode); 964c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 96551865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 96674cd15cdSZheng Liu ext4_es_lru_del(inode); 9678aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9688aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9698aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9708aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9718aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9728aefcd55STheodore Ts'o } 973ac27a0ecSDave Kleikamp } 974ac27a0ecSDave Kleikamp 9751b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9761b961ac0SChristoph Hellwig u64 ino, u32 generation) 977ac27a0ecSDave Kleikamp { 978ac27a0ecSDave Kleikamp struct inode *inode; 979ac27a0ecSDave Kleikamp 980617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 981ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 982617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 983ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 984ac27a0ecSDave Kleikamp 985ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 986ac27a0ecSDave Kleikamp * 987617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 988ac27a0ecSDave Kleikamp * deleted, so we should be safe. 989ac27a0ecSDave Kleikamp * 990ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 991ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 992ac27a0ecSDave Kleikamp */ 993f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 9941d1fe1eeSDavid Howells if (IS_ERR(inode)) 9951d1fe1eeSDavid Howells return ERR_CAST(inode); 9961d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 997ac27a0ecSDave Kleikamp iput(inode); 998ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 999ac27a0ecSDave Kleikamp } 10001b961ac0SChristoph Hellwig 10011b961ac0SChristoph Hellwig return inode; 1002ac27a0ecSDave Kleikamp } 10031b961ac0SChristoph Hellwig 10041b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10051b961ac0SChristoph Hellwig int fh_len, int fh_type) 10061b961ac0SChristoph Hellwig { 10071b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10081b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10091b961ac0SChristoph Hellwig } 10101b961ac0SChristoph Hellwig 10111b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10121b961ac0SChristoph Hellwig int fh_len, int fh_type) 10131b961ac0SChristoph Hellwig { 10141b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10151b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1016ac27a0ecSDave Kleikamp } 1017ac27a0ecSDave Kleikamp 1018c39a7f84SToshiyuki Okajima /* 1019c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1020c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1021c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1022c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1023c39a7f84SToshiyuki Okajima */ 10240b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10250b8e58a1SAndreas Dilger gfp_t wait) 1026c39a7f84SToshiyuki Okajima { 1027c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1028c39a7f84SToshiyuki Okajima 1029c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1030c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1031c39a7f84SToshiyuki Okajima return 0; 1032c39a7f84SToshiyuki Okajima if (journal) 1033c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1034c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1035c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1036c39a7f84SToshiyuki Okajima } 1037c39a7f84SToshiyuki Okajima 1038ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1039ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1040ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1041ac27a0ecSDave Kleikamp 1042617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1043617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1044617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1045617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1046617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10476f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1048f00c9e44SJan Kara struct path *path); 10497c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 10507c319d32SAditya Kali int format_id); 1051ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 10527c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type); 1053617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1054617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1055ac27a0ecSDave Kleikamp size_t len, loff_t off); 1056617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1057ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 10587c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 10597c319d32SAditya Kali unsigned int flags); 10607c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1061ac27a0ecSDave Kleikamp 106261e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 106360e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1064617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1065617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1066617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1067617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1068a5b5ee32SJan Kara .write_info = ext4_write_info, 1069a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1070a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1071ac27a0ecSDave Kleikamp }; 1072ac27a0ecSDave Kleikamp 10730d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1074617ba13bSMingming Cao .quota_on = ext4_quota_on, 1075ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1076287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1077287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1078287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1079287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1080287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1081ac27a0ecSDave Kleikamp }; 10827c319d32SAditya Kali 10837c319d32SAditya Kali static const struct quotactl_ops ext4_qctl_sysfile_operations = { 10847c319d32SAditya Kali .quota_on_meta = ext4_quota_on_sysfile, 10857c319d32SAditya Kali .quota_off = ext4_quota_off_sysfile, 10867c319d32SAditya Kali .quota_sync = dquot_quota_sync, 10877c319d32SAditya Kali .get_info = dquot_get_dqinfo, 10887c319d32SAditya Kali .set_info = dquot_set_dqinfo, 10897c319d32SAditya Kali .get_dqblk = dquot_get_dqblk, 10907c319d32SAditya Kali .set_dqblk = dquot_set_dqblk 10917c319d32SAditya Kali }; 1092ac27a0ecSDave Kleikamp #endif 1093ac27a0ecSDave Kleikamp 1094ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1095617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1096617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1097617ba13bSMingming Cao .write_inode = ext4_write_inode, 1098617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 10997ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11000930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1101617ba13bSMingming Cao .put_super = ext4_put_super, 1102617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1103c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1104c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1105617ba13bSMingming Cao .statfs = ext4_statfs, 1106617ba13bSMingming Cao .remount_fs = ext4_remount, 1107617ba13bSMingming Cao .show_options = ext4_show_options, 1108ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1109617ba13bSMingming Cao .quota_read = ext4_quota_read, 1110617ba13bSMingming Cao .quota_write = ext4_quota_write, 1111ac27a0ecSDave Kleikamp #endif 1112c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1113ac27a0ecSDave Kleikamp }; 1114ac27a0ecSDave Kleikamp 111539655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11161b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11171b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1118617ba13bSMingming Cao .get_parent = ext4_get_parent, 1119ac27a0ecSDave Kleikamp }; 1120ac27a0ecSDave Kleikamp 1121ac27a0ecSDave Kleikamp enum { 1122ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1123ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 112472578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1125ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 112672578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1127ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1128ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1129ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1130296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1131ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11325a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1133ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1134661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 11351449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 11361449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11375328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1138744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1139fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1140df981d03STheodore Ts'o Opt_max_dir_size_kb, 1141ac27a0ecSDave Kleikamp }; 1142ac27a0ecSDave Kleikamp 1143a447c093SSteven Whitehouse static const match_table_t tokens = { 1144ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1145ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1146ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1147ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1148ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1149ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1150ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1151ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1152ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1153ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1154ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1155ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1156ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1157ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 115872578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 115972578c33STheodore Ts'o {Opt_removed, "orlov"}, 1160ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1161ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1162ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1163ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1164e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11655a916be1STheodore Ts'o {Opt_noload, "noload"}, 116672578c33STheodore Ts'o {Opt_removed, "nobh"}, 116772578c33STheodore Ts'o {Opt_removed, "bh"}, 1168ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 116930773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 117030773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1171ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1172ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1173818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1174818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1175ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1176ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1177ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1178ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11795bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11805bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1181ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1182ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1183ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1184ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1185ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1186ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 11875a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1188ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1189ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1190ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1191ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1192ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 119306705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 119406705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 119525ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1196c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 119764769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1198dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 119936ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 120036ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 12016fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12026fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1203240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1204b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1205afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 120606705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 120706705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1208744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1209744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12105328e635SEric Sandeen {Opt_discard, "discard"}, 12115328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1212fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1213fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1214fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1215df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1216c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1217c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1218c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1219c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1220c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1221f3f12faaSJosef Bacik {Opt_err, NULL}, 1222ac27a0ecSDave Kleikamp }; 1223ac27a0ecSDave Kleikamp 1224617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1225ac27a0ecSDave Kleikamp { 1226617ba13bSMingming Cao ext4_fsblk_t sb_block; 1227ac27a0ecSDave Kleikamp char *options = (char *) *data; 1228ac27a0ecSDave Kleikamp 1229ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1230ac27a0ecSDave Kleikamp return 1; /* Default location */ 12310b8e58a1SAndreas Dilger 1232ac27a0ecSDave Kleikamp options += 3; 12330b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1234ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1235ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12364776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1237ac27a0ecSDave Kleikamp (char *) *data); 1238ac27a0ecSDave Kleikamp return 1; 1239ac27a0ecSDave Kleikamp } 1240ac27a0ecSDave Kleikamp if (*options == ',') 1241ac27a0ecSDave Kleikamp options++; 1242ac27a0ecSDave Kleikamp *data = (void *) options; 12430b8e58a1SAndreas Dilger 1244ac27a0ecSDave Kleikamp return sb_block; 1245ac27a0ecSDave Kleikamp } 1246ac27a0ecSDave Kleikamp 1247b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1248437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1249437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1250b3881f74STheodore Ts'o 125156c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 125256c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 125356c50f11SDmitry Monakhov { 125456c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 125556c50f11SDmitry Monakhov char *qname; 125603dafb5fSChen Gang int ret = -1; 125756c50f11SDmitry Monakhov 125856c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 125956c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 126056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 126156c50f11SDmitry Monakhov "Cannot change journaled " 126256c50f11SDmitry Monakhov "quota options when quota turned on"); 126357f73c2cSTheodore Ts'o return -1; 126456c50f11SDmitry Monakhov } 1265262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1266262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1267262b4662SJan Kara "when QUOTA feature is enabled"); 1268262b4662SJan Kara return -1; 1269262b4662SJan Kara } 127056c50f11SDmitry Monakhov qname = match_strdup(args); 127156c50f11SDmitry Monakhov if (!qname) { 127256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127356c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 127457f73c2cSTheodore Ts'o return -1; 127556c50f11SDmitry Monakhov } 127603dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 127703dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 127803dafb5fSChen Gang ret = 1; 127903dafb5fSChen Gang else 128056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128103dafb5fSChen Gang "%s quota file already specified", 128203dafb5fSChen Gang QTYPE2NAME(qtype)); 128303dafb5fSChen Gang goto errout; 128456c50f11SDmitry Monakhov } 128503dafb5fSChen Gang if (strchr(qname, '/')) { 128656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128756c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 128803dafb5fSChen Gang goto errout; 128956c50f11SDmitry Monakhov } 129003dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1291fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 129256c50f11SDmitry Monakhov return 1; 129303dafb5fSChen Gang errout: 129403dafb5fSChen Gang kfree(qname); 129503dafb5fSChen Gang return ret; 129656c50f11SDmitry Monakhov } 129756c50f11SDmitry Monakhov 129856c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 129956c50f11SDmitry Monakhov { 130056c50f11SDmitry Monakhov 130156c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 130256c50f11SDmitry Monakhov 130356c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 130456c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 130556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 130656c50f11SDmitry Monakhov " when quota turned on"); 130757f73c2cSTheodore Ts'o return -1; 130856c50f11SDmitry Monakhov } 130903dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 131056c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 131156c50f11SDmitry Monakhov return 1; 131256c50f11SDmitry Monakhov } 131356c50f11SDmitry Monakhov #endif 131456c50f11SDmitry Monakhov 131526092bf5STheodore Ts'o #define MOPT_SET 0x0001 131626092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 131726092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 131826092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 131926092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 132026092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 132126092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 132226092bf5STheodore Ts'o #define MOPT_Q 0 132326092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 132426092bf5STheodore Ts'o #else 132526092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 132626092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 132726092bf5STheodore Ts'o #endif 132826092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13298dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13308dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13318dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1332ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 133326092bf5STheodore Ts'o 133426092bf5STheodore Ts'o static const struct mount_opts { 133526092bf5STheodore Ts'o int token; 133626092bf5STheodore Ts'o int mount_opt; 133726092bf5STheodore Ts'o int flags; 133826092bf5STheodore Ts'o } ext4_mount_opts[] = { 133926092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 134026092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 134126092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 134226092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 134326092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 134426092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13458dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13468dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13478dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13488dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 134926092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 135026092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13518dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13528dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13538dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 135459d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 13558dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 13568dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 135726092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13588dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 13598dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13608dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 136126092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 136226092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 136326092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13648dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13658dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13668dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13678dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 136826092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 136926092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 137026092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 137126092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 137226092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 137326092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 137426092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 137526092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 137626092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 137726092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 137826092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 13790efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 13800efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 13810efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 1382ad4eec61SEric Sandeen {Opt_journal_path, 0, MOPT_STRING}, 13830efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 13848dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13858dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13868dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 13878dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 138826092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 138926092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 139026092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 139126092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 139226092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 139326092bf5STheodore Ts'o #else 139426092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 139526092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 139626092bf5STheodore Ts'o #endif 139726092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 139826092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 139926092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 140026092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 140126092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 140226092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 140326092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 140426092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 140526092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 140626092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 140726092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 140826092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 140926092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 141026092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 141126092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 141226092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1413df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 141426092bf5STheodore Ts'o {Opt_err, 0, 0} 141526092bf5STheodore Ts'o }; 141626092bf5STheodore Ts'o 141726092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 141826092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 141926092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 142026092bf5STheodore Ts'o { 142126092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 142226092bf5STheodore Ts'o const struct mount_opts *m; 142308cefc7aSEric W. Biederman kuid_t uid; 142408cefc7aSEric W. Biederman kgid_t gid; 142526092bf5STheodore Ts'o int arg = 0; 142626092bf5STheodore Ts'o 142757f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 142857f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 142957f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 143057f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 143157f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 143257f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 143357f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 143457f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 143557f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 143657f73c2cSTheodore Ts'o #endif 143726092bf5STheodore Ts'o switch (token) { 1438f7048605STheodore Ts'o case Opt_noacl: 1439f7048605STheodore Ts'o case Opt_nouser_xattr: 1440f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1441f7048605STheodore Ts'o break; 144226092bf5STheodore Ts'o case Opt_sb: 144326092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 144426092bf5STheodore Ts'o case Opt_removed: 14455f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 144626092bf5STheodore Ts'o return 1; 144726092bf5STheodore Ts'o case Opt_abort: 144826092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 144926092bf5STheodore Ts'o return 1; 145026092bf5STheodore Ts'o case Opt_i_version: 145126092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 145226092bf5STheodore Ts'o return 1; 145326092bf5STheodore Ts'o } 145426092bf5STheodore Ts'o 14555f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14565f3633e3SJan Kara if (token == m->token) 14575f3633e3SJan Kara break; 14585f3633e3SJan Kara 14595f3633e3SJan Kara if (m->token == Opt_err) { 14605f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 14615f3633e3SJan Kara "or missing value", opt); 14625f3633e3SJan Kara return -1; 14635f3633e3SJan Kara } 14645f3633e3SJan Kara 14658dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 14668dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14678dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 14688dc0aa8cSTheodore Ts'o return -1; 14698dc0aa8cSTheodore Ts'o } 14708dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 14718dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14728dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 14738dc0aa8cSTheodore Ts'o return -1; 14748dc0aa8cSTheodore Ts'o } 14758dc0aa8cSTheodore Ts'o 1476ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 14770efb3b23SJan Kara return -1; 147826092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 147926092bf5STheodore Ts'o return -1; 148026092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 148126092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 148226092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 148326092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 148426092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 148526092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 148626092bf5STheodore Ts'o "options when quota turned on"); 148726092bf5STheodore Ts'o return -1; 148826092bf5STheodore Ts'o } 148926092bf5STheodore Ts'o 149026092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 149126092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 149226092bf5STheodore Ts'o } else if (token == Opt_commit) { 149326092bf5STheodore Ts'o if (arg == 0) 149426092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 149526092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 149626092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 149726092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 149826092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 149926092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 150026092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1501e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1502e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1503e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1504e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 150526092bf5STheodore Ts'o return -1; 150626092bf5STheodore Ts'o } 150726092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 150826092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 150926092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 151026092bf5STheodore Ts'o if (!args->from) 151126092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 151226092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1513df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1514df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 151526092bf5STheodore Ts'o } else if (token == Opt_stripe) { 151626092bf5STheodore Ts'o sbi->s_stripe = arg; 15170efb3b23SJan Kara } else if (token == Opt_resuid) { 15180efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15190efb3b23SJan Kara if (!uid_valid(uid)) { 15205f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15210efb3b23SJan Kara return -1; 15220efb3b23SJan Kara } 15230efb3b23SJan Kara sbi->s_resuid = uid; 15240efb3b23SJan Kara } else if (token == Opt_resgid) { 15250efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15260efb3b23SJan Kara if (!gid_valid(gid)) { 15275f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15280efb3b23SJan Kara return -1; 15290efb3b23SJan Kara } 15300efb3b23SJan Kara sbi->s_resgid = gid; 15310efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15320efb3b23SJan Kara if (is_remount) { 15330efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15340efb3b23SJan Kara "Cannot specify journal on remount"); 15350efb3b23SJan Kara return -1; 15360efb3b23SJan Kara } 15370efb3b23SJan Kara *journal_devnum = arg; 1538ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1539ad4eec61SEric Sandeen char *journal_path; 1540ad4eec61SEric Sandeen struct inode *journal_inode; 1541ad4eec61SEric Sandeen struct path path; 1542ad4eec61SEric Sandeen int error; 1543ad4eec61SEric Sandeen 1544ad4eec61SEric Sandeen if (is_remount) { 1545ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1546ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1547ad4eec61SEric Sandeen return -1; 1548ad4eec61SEric Sandeen } 1549ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1550ad4eec61SEric Sandeen if (!journal_path) { 1551ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1552ad4eec61SEric Sandeen "journal device string"); 1553ad4eec61SEric Sandeen return -1; 1554ad4eec61SEric Sandeen } 1555ad4eec61SEric Sandeen 1556ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1557ad4eec61SEric Sandeen if (error) { 1558ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1559ad4eec61SEric Sandeen "journal device path: error %d", error); 1560ad4eec61SEric Sandeen kfree(journal_path); 1561ad4eec61SEric Sandeen return -1; 1562ad4eec61SEric Sandeen } 1563ad4eec61SEric Sandeen 1564ad4eec61SEric Sandeen journal_inode = path.dentry->d_inode; 1565ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1566ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1567ad4eec61SEric Sandeen "is not a block device", journal_path); 1568ad4eec61SEric Sandeen path_put(&path); 1569ad4eec61SEric Sandeen kfree(journal_path); 1570ad4eec61SEric Sandeen return -1; 1571ad4eec61SEric Sandeen } 1572ad4eec61SEric Sandeen 1573ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1574ad4eec61SEric Sandeen path_put(&path); 1575ad4eec61SEric Sandeen kfree(journal_path); 15760efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 15770efb3b23SJan Kara if (arg > 7) { 15785f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 15790efb3b23SJan Kara " (must be 0-7)"); 15800efb3b23SJan Kara return -1; 15810efb3b23SJan Kara } 15820efb3b23SJan Kara *journal_ioprio = 15830efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 158426092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 158526092bf5STheodore Ts'o if (is_remount) { 158626092bf5STheodore Ts'o if (!sbi->s_journal) 158726092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 15885f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 158926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 159026092bf5STheodore Ts'o "Cannot change data mode on remount"); 159126092bf5STheodore Ts'o return -1; 159226092bf5STheodore Ts'o } 159326092bf5STheodore Ts'o } else { 159426092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 159526092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 159626092bf5STheodore Ts'o } 159726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 159826092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 159926092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 160026092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16015f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16025f3633e3SJan Kara "quota options when quota turned on"); 160326092bf5STheodore Ts'o return -1; 160426092bf5STheodore Ts'o } 1605262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1606262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1607262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1608262b4662SJan Kara "Cannot set journaled quota options " 1609262b4662SJan Kara "when QUOTA feature is enabled"); 1610262b4662SJan Kara return -1; 1611262b4662SJan Kara } 161226092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 161326092bf5STheodore Ts'o #endif 161426092bf5STheodore Ts'o } else { 161526092bf5STheodore Ts'o if (!args->from) 161626092bf5STheodore Ts'o arg = 1; 161726092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 161826092bf5STheodore Ts'o arg = !arg; 161926092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 162026092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 162126092bf5STheodore Ts'o "buggy handling of option %s", opt); 162226092bf5STheodore Ts'o WARN_ON(1); 162326092bf5STheodore Ts'o return -1; 162426092bf5STheodore Ts'o } 162526092bf5STheodore Ts'o if (arg != 0) 162626092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 162726092bf5STheodore Ts'o else 162826092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 162926092bf5STheodore Ts'o } 163026092bf5STheodore Ts'o return 1; 163126092bf5STheodore Ts'o } 163226092bf5STheodore Ts'o 1633ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1634c3191067STheodore Ts'o unsigned long *journal_devnum, 1635b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1636661aa520SEric Sandeen int is_remount) 1637ac27a0ecSDave Kleikamp { 1638617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1639ac27a0ecSDave Kleikamp char *p; 1640ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 164126092bf5STheodore Ts'o int token; 1642ac27a0ecSDave Kleikamp 1643ac27a0ecSDave Kleikamp if (!options) 1644ac27a0ecSDave Kleikamp return 1; 1645ac27a0ecSDave Kleikamp 1646ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1647ac27a0ecSDave Kleikamp if (!*p) 1648ac27a0ecSDave Kleikamp continue; 164915121c18SEric Sandeen /* 165015121c18SEric Sandeen * Initialize args struct so we know whether arg was 165115121c18SEric Sandeen * found; some options take optional arguments. 165215121c18SEric Sandeen */ 1653caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1654ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 165526092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 165626092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1657ac27a0ecSDave Kleikamp return 0; 1658ac27a0ecSDave Kleikamp } 1659ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1660262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1661262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1662262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1663262b4662SJan Kara "feature is enabled"); 1664262b4662SJan Kara return 0; 1665262b4662SJan Kara } 1666ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1667482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1668fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1669ac27a0ecSDave Kleikamp 1670482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1671fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1672ac27a0ecSDave Kleikamp 167356c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1674b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1675b31e1552SEric Sandeen "format mixing"); 1676ac27a0ecSDave Kleikamp return 0; 1677ac27a0ecSDave Kleikamp } 1678ac27a0ecSDave Kleikamp 1679ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1680b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1681b31e1552SEric Sandeen "not specified"); 1682ac27a0ecSDave Kleikamp return 0; 1683ac27a0ecSDave Kleikamp } 1684ac27a0ecSDave Kleikamp } 1685ac27a0ecSDave Kleikamp #endif 1686261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1687261cb20cSJan Kara int blocksize = 1688261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1689261cb20cSJan Kara 1690261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1691261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1692261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1693261cb20cSJan Kara return 0; 1694261cb20cSJan Kara } 1695261cb20cSJan Kara } 1696ac27a0ecSDave Kleikamp return 1; 1697ac27a0ecSDave Kleikamp } 1698ac27a0ecSDave Kleikamp 16992adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17002adf6da8STheodore Ts'o struct super_block *sb) 17012adf6da8STheodore Ts'o { 17022adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17032adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17042adf6da8STheodore Ts'o 17052adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17062adf6da8STheodore Ts'o char *fmtname = ""; 17072adf6da8STheodore Ts'o 17082adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17092adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17102adf6da8STheodore Ts'o fmtname = "vfsold"; 17112adf6da8STheodore Ts'o break; 17122adf6da8STheodore Ts'o case QFMT_VFS_V0: 17132adf6da8STheodore Ts'o fmtname = "vfsv0"; 17142adf6da8STheodore Ts'o break; 17152adf6da8STheodore Ts'o case QFMT_VFS_V1: 17162adf6da8STheodore Ts'o fmtname = "vfsv1"; 17172adf6da8STheodore Ts'o break; 17182adf6da8STheodore Ts'o } 17192adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17202adf6da8STheodore Ts'o } 17212adf6da8STheodore Ts'o 17222adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17232adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17242adf6da8STheodore Ts'o 17252adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17262adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17272adf6da8STheodore Ts'o #endif 17282adf6da8STheodore Ts'o } 17292adf6da8STheodore Ts'o 17305a916be1STheodore Ts'o static const char *token2str(int token) 17315a916be1STheodore Ts'o { 173250df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17335a916be1STheodore Ts'o 17345a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17355a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17365a916be1STheodore Ts'o break; 17375a916be1STheodore Ts'o return t->pattern; 17385a916be1STheodore Ts'o } 17395a916be1STheodore Ts'o 17402adf6da8STheodore Ts'o /* 17412adf6da8STheodore Ts'o * Show an option if 17422adf6da8STheodore Ts'o * - it's set to a non-default value OR 17432adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17442adf6da8STheodore Ts'o */ 174566acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 174666acdcf4STheodore Ts'o int nodefs) 17472adf6da8STheodore Ts'o { 17482adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17492adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 175066acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17515a916be1STheodore Ts'o const struct mount_opts *m; 175266acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17532adf6da8STheodore Ts'o 175466acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 175566acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17562adf6da8STheodore Ts'o 17572adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17585a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17595a916be1STheodore Ts'o 17605a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17615a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17625a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17635a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17645a916be1STheodore Ts'o continue; 176566acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17665a916be1STheodore Ts'o continue; /* skip if same as the default */ 17675a916be1STheodore Ts'o if ((want_set && 17685a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17695a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17705a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17715a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17725a916be1STheodore Ts'o } 17735a916be1STheodore Ts'o 177408cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17755a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 177608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 177708cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 177808cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 17795a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 178008cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 178108cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 178266acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 17835a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 17845a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 17852adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 17865a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 17872adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 17885a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 178966acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 17905a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 179166acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 17925a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 179366acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 17945a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 17952adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 17965a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 179766acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 17985a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 179966acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18002adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18015a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18022adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18035a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18042adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18055a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18065a916be1STheodore Ts'o } 180766acdcf4STheodore Ts'o if (nodefs || 180866acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18095a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18102adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18112adf6da8STheodore Ts'o 181266acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 181366acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18145a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1815df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1816df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18172adf6da8STheodore Ts'o 18182adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18192adf6da8STheodore Ts'o return 0; 18202adf6da8STheodore Ts'o } 18212adf6da8STheodore Ts'o 182266acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 182366acdcf4STheodore Ts'o { 182466acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 182566acdcf4STheodore Ts'o } 182666acdcf4STheodore Ts'o 182766acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 182866acdcf4STheodore Ts'o { 182966acdcf4STheodore Ts'o struct super_block *sb = seq->private; 183066acdcf4STheodore Ts'o int rc; 183166acdcf4STheodore Ts'o 183266acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 183366acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 183466acdcf4STheodore Ts'o seq_puts(seq, "\n"); 183566acdcf4STheodore Ts'o return rc; 183666acdcf4STheodore Ts'o } 183766acdcf4STheodore Ts'o 183866acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 183966acdcf4STheodore Ts'o { 1840d9dda78bSAl Viro return single_open(file, options_seq_show, PDE_DATA(inode)); 184166acdcf4STheodore Ts'o } 184266acdcf4STheodore Ts'o 184366acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 184466acdcf4STheodore Ts'o .owner = THIS_MODULE, 184566acdcf4STheodore Ts'o .open = options_open_fs, 184666acdcf4STheodore Ts'o .read = seq_read, 184766acdcf4STheodore Ts'o .llseek = seq_lseek, 184866acdcf4STheodore Ts'o .release = single_release, 184966acdcf4STheodore Ts'o }; 185066acdcf4STheodore Ts'o 1851617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1852ac27a0ecSDave Kleikamp int read_only) 1853ac27a0ecSDave Kleikamp { 1854617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1855ac27a0ecSDave Kleikamp int res = 0; 1856ac27a0ecSDave Kleikamp 1857617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1858b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1859b31e1552SEric Sandeen "forcing read-only mode"); 1860ac27a0ecSDave Kleikamp res = MS_RDONLY; 1861ac27a0ecSDave Kleikamp } 1862ac27a0ecSDave Kleikamp if (read_only) 1863281b5995STheodore Ts'o goto done; 1864617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1865b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1866b31e1552SEric Sandeen "running e2fsck is recommended"); 1867c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 1868b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1869b31e1552SEric Sandeen "warning: mounting fs with errors, " 1870b31e1552SEric Sandeen "running e2fsck is recommended"); 1871ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1872ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1873ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1874b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1875b31e1552SEric Sandeen "warning: maximal mount count reached, " 1876b31e1552SEric Sandeen "running e2fsck is recommended"); 1877ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1878ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1879ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1880b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1881b31e1552SEric Sandeen "warning: checktime reached, " 1882b31e1552SEric Sandeen "running e2fsck is recommended"); 18830390131bSFrank Mayhar if (!sbi->s_journal) 1884216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1885ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1886617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1887e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1888ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1889617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 18900390131bSFrank Mayhar if (sbi->s_journal) 1891617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1892ac27a0ecSDave Kleikamp 1893e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1894281b5995STheodore Ts'o done: 1895ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1896a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1897a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1898ac27a0ecSDave Kleikamp sb->s_blocksize, 1899ac27a0ecSDave Kleikamp sbi->s_groups_count, 1900617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1901617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1902a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1903ac27a0ecSDave Kleikamp 19047abc52c2SDan Magenheimer cleancache_init_fs(sb); 1905ac27a0ecSDave Kleikamp return res; 1906ac27a0ecSDave Kleikamp } 1907ac27a0ecSDave Kleikamp 1908117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1909117fff10STheodore Ts'o { 1910117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1911117fff10STheodore Ts'o struct flex_groups *new_groups; 1912117fff10STheodore Ts'o int size; 1913117fff10STheodore Ts'o 1914117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1915117fff10STheodore Ts'o return 0; 1916117fff10STheodore Ts'o 1917117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1918117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1919117fff10STheodore Ts'o return 0; 1920117fff10STheodore Ts'o 1921117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1922117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1923117fff10STheodore Ts'o if (!new_groups) { 1924117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1925117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1926117fff10STheodore Ts'o return -ENOMEM; 1927117fff10STheodore Ts'o } 1928117fff10STheodore Ts'o 1929117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1930117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1931117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1932117fff10STheodore Ts'o sizeof(struct flex_groups))); 1933*b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 1934117fff10STheodore Ts'o } 1935117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1936117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1937117fff10STheodore Ts'o return 0; 1938117fff10STheodore Ts'o } 1939117fff10STheodore Ts'o 1940772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1941772cb7c8SJose R. Santos { 1942772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1943772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1944772cb7c8SJose R. Santos ext4_group_t flex_group; 1945117fff10STheodore Ts'o int i, err; 1946772cb7c8SJose R. Santos 1947503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1948d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1949772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1950772cb7c8SJose R. Santos return 1; 1951772cb7c8SJose R. Santos } 1952772cb7c8SJose R. Santos 1953117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1954117fff10STheodore Ts'o if (err) 1955772cb7c8SJose R. Santos goto failed; 1956772cb7c8SJose R. Santos 1957772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 195888b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1959772cb7c8SJose R. Santos 1960772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19617ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19627ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 196390ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 196424aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19657ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19667ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1967772cb7c8SJose R. Santos } 1968772cb7c8SJose R. Santos 1969772cb7c8SJose R. Santos return 1; 1970772cb7c8SJose R. Santos failed: 1971772cb7c8SJose R. Santos return 0; 1972772cb7c8SJose R. Santos } 1973772cb7c8SJose R. Santos 1974feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1975717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1976717d50e4SAndreas Dilger { 1977feb0ab32SDarrick J. Wong int offset; 1978717d50e4SAndreas Dilger __u16 crc = 0; 1979717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1980717d50e4SAndreas Dilger 19819aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 1982feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1983d6a77105STheodore Ts'o __le16 save_csum; 1984feb0ab32SDarrick J. Wong __u32 csum32; 1985feb0ab32SDarrick J. Wong 1986d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 1987feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 1988feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 1989feb0ab32SDarrick J. Wong sizeof(le_group)); 1990feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 1991feb0ab32SDarrick J. Wong sbi->s_desc_size); 1992d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 1993feb0ab32SDarrick J. Wong 1994feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 1995feb0ab32SDarrick J. Wong goto out; 1996feb0ab32SDarrick J. Wong } 1997feb0ab32SDarrick J. Wong 1998feb0ab32SDarrick J. Wong /* old crc16 code */ 1999813d32f9SDarrick J. Wong if (!(sbi->s_es->s_feature_ro_compat & 2000813d32f9SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM))) 2001813d32f9SDarrick J. Wong return 0; 2002813d32f9SDarrick J. Wong 2003feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2004feb0ab32SDarrick J. Wong 2005717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2006717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2007717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2008717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2009717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2010717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2011717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2012717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2013717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2014717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2015717d50e4SAndreas Dilger offset); 2016717d50e4SAndreas Dilger 2017feb0ab32SDarrick J. Wong out: 2018717d50e4SAndreas Dilger return cpu_to_le16(crc); 2019717d50e4SAndreas Dilger } 2020717d50e4SAndreas Dilger 2021feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2022717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2023717d50e4SAndreas Dilger { 2024feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2025feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2026feb0ab32SDarrick J. Wong block_group, gdp))) 2027717d50e4SAndreas Dilger return 0; 2028717d50e4SAndreas Dilger 2029717d50e4SAndreas Dilger return 1; 2030717d50e4SAndreas Dilger } 2031717d50e4SAndreas Dilger 2032feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2033feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2034feb0ab32SDarrick J. Wong { 2035feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2036feb0ab32SDarrick J. Wong return; 2037feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2038feb0ab32SDarrick J. Wong } 2039feb0ab32SDarrick J. Wong 2040ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2041bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2042bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2043ac27a0ecSDave Kleikamp { 2044617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2045617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2046617ba13bSMingming Cao ext4_fsblk_t last_block; 2047bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2048bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2049bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2050ce421581SJose R. Santos int flexbg_flag = 0; 2051bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2052ac27a0ecSDave Kleikamp 2053ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2054ce421581SJose R. Santos flexbg_flag = 1; 2055ce421581SJose R. Santos 2056617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2057ac27a0ecSDave Kleikamp 2058197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2059197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2060197cd65aSAkinobu Mita 2061ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2062bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2063ac27a0ecSDave Kleikamp else 2064ac27a0ecSDave Kleikamp last_block = first_block + 2065617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2066ac27a0ecSDave Kleikamp 2067bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2068bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2069bfff6873SLukas Czerner grp = i; 2070bfff6873SLukas Czerner 20718fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20722b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2073b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2074a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2075b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2076ac27a0ecSDave Kleikamp return 0; 2077ac27a0ecSDave Kleikamp } 20788fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20792b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2080b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2081a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2082b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2083ac27a0ecSDave Kleikamp return 0; 2084ac27a0ecSDave Kleikamp } 20858fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2086bd81d8eeSLaurent Vivier if (inode_table < first_block || 20872b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2088b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2089a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2090b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2091ac27a0ecSDave Kleikamp return 0; 2092ac27a0ecSDave Kleikamp } 2093955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2094feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2095b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2096b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2097fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2098fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20997ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2100955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2101717d50e4SAndreas Dilger return 0; 2102717d50e4SAndreas Dilger } 21037ee1ec4cSLi Zefan } 2104955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2105ce421581SJose R. Santos if (!flexbg_flag) 2106617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2107ac27a0ecSDave Kleikamp } 2108bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2109bfff6873SLukas Czerner *first_not_zeroed = grp; 2110ac27a0ecSDave Kleikamp return 1; 2111ac27a0ecSDave Kleikamp } 2112ac27a0ecSDave Kleikamp 2113617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2114ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2115ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2116ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2117ac27a0ecSDave Kleikamp * 2118ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2119ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2120ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2121ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2122ac27a0ecSDave Kleikamp * 2123ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2124ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2125ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2126617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2127ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2128ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2129ac27a0ecSDave Kleikamp */ 2130617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2131617ba13bSMingming Cao struct ext4_super_block *es) 2132ac27a0ecSDave Kleikamp { 2133ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2134ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2135ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2136ac27a0ecSDave Kleikamp int i; 2137ac27a0ecSDave Kleikamp #endif 2138ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2139ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2140ac27a0ecSDave Kleikamp return; 2141ac27a0ecSDave Kleikamp } 2142ac27a0ecSDave Kleikamp 2143a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2144b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2145b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2146a8f48a95SEric Sandeen return; 2147a8f48a95SEric Sandeen } 2148a8f48a95SEric Sandeen 2149d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2150d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2151d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2152d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2153d39195c3SAmir Goldstein return; 2154d39195c3SAmir Goldstein } 2155d39195c3SAmir Goldstein 2156617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2157c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2158c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 215984474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2160ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2161ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2162c25f9bc6SEric Sandeen } 2163ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2164ac27a0ecSDave Kleikamp return; 2165ac27a0ecSDave Kleikamp } 2166ac27a0ecSDave Kleikamp 2167ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2168b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2169ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2170ac27a0ecSDave Kleikamp } 2171ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2172ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2173ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2174ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2175a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2176617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2177617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2178ac27a0ecSDave Kleikamp if (ret < 0) 2179b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2180b31e1552SEric Sandeen "Cannot turn on journaled " 2181b31e1552SEric Sandeen "quota: error %d", ret); 2182ac27a0ecSDave Kleikamp } 2183ac27a0ecSDave Kleikamp } 2184ac27a0ecSDave Kleikamp #endif 2185ac27a0ecSDave Kleikamp 2186ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2187ac27a0ecSDave Kleikamp struct inode *inode; 2188ac27a0ecSDave Kleikamp 218997bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 219097bd42b9SJosef Bacik if (IS_ERR(inode)) { 2191ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2192ac27a0ecSDave Kleikamp break; 2193ac27a0ecSDave Kleikamp } 2194ac27a0ecSDave Kleikamp 2195617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2196871a2931SChristoph Hellwig dquot_initialize(inode); 2197ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2198566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2199b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2200b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 220146e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2202e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2203ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2204721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 220555f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2206617ba13bSMingming Cao ext4_truncate(inode); 2207721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2208ac27a0ecSDave Kleikamp nr_truncates++; 2209ac27a0ecSDave Kleikamp } else { 2210566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2211b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2212b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 221346e665e9SHarvey Harrison __func__, inode->i_ino); 2214ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2215ac27a0ecSDave Kleikamp inode->i_ino); 2216ac27a0ecSDave Kleikamp nr_orphans++; 2217ac27a0ecSDave Kleikamp } 2218ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2219ac27a0ecSDave Kleikamp } 2220ac27a0ecSDave Kleikamp 2221ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2222ac27a0ecSDave Kleikamp 2223ac27a0ecSDave Kleikamp if (nr_orphans) 2224b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2225b31e1552SEric Sandeen PLURAL(nr_orphans)); 2226ac27a0ecSDave Kleikamp if (nr_truncates) 2227b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2228b31e1552SEric Sandeen PLURAL(nr_truncates)); 2229ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2230ac27a0ecSDave Kleikamp /* Turn quotas off */ 2231a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2232ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2233287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2234ac27a0ecSDave Kleikamp } 2235ac27a0ecSDave Kleikamp #endif 2236ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2237ac27a0ecSDave Kleikamp } 22380b8e58a1SAndreas Dilger 2239cd2291a4SEric Sandeen /* 2240cd2291a4SEric Sandeen * Maximal extent format file size. 2241cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2242cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2243cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2244cd2291a4SEric Sandeen * so that won't be a limiting factor. 2245cd2291a4SEric Sandeen * 2246f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2247f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2248f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2249f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2250f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2251f17722f9SLukas Czerner * 2252cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2253cd2291a4SEric Sandeen */ 2254f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2255cd2291a4SEric Sandeen { 2256cd2291a4SEric Sandeen loff_t res; 2257cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2258cd2291a4SEric Sandeen 2259cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2260f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2261cd2291a4SEric Sandeen /* 226290c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2263cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2264cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2265cd2291a4SEric Sandeen */ 2266cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2267cd2291a4SEric Sandeen 2268cd2291a4SEric Sandeen /* total blocks in file system block size */ 2269cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2270cd2291a4SEric Sandeen upper_limit <<= blkbits; 2271cd2291a4SEric Sandeen } 2272cd2291a4SEric Sandeen 2273f17722f9SLukas Czerner /* 2274f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2275f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2276f17722f9SLukas Czerner * size 2277f17722f9SLukas Czerner */ 2278f17722f9SLukas Czerner res = (1LL << 32) - 1; 2279cd2291a4SEric Sandeen res <<= blkbits; 2280cd2291a4SEric Sandeen 2281cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2282cd2291a4SEric Sandeen if (res > upper_limit) 2283cd2291a4SEric Sandeen res = upper_limit; 2284cd2291a4SEric Sandeen 2285cd2291a4SEric Sandeen return res; 2286cd2291a4SEric Sandeen } 2287ac27a0ecSDave Kleikamp 2288ac27a0ecSDave Kleikamp /* 2289cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22900fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22910fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2292ac27a0ecSDave Kleikamp */ 2293f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2294ac27a0ecSDave Kleikamp { 2295617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22960fc1b451SAneesh Kumar K.V int meta_blocks; 22970fc1b451SAneesh Kumar K.V loff_t upper_limit; 22980b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22990b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23000b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23010b8e58a1SAndreas Dilger * 23020b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23030b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23040fc1b451SAneesh Kumar K.V */ 23050fc1b451SAneesh Kumar K.V 2306f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23070fc1b451SAneesh Kumar K.V /* 230890c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23090b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23100b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23110fc1b451SAneesh Kumar K.V */ 23120fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23130fc1b451SAneesh Kumar K.V 23140fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23150fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23160fc1b451SAneesh Kumar K.V 23170fc1b451SAneesh Kumar K.V } else { 23188180a562SAneesh Kumar K.V /* 23198180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23208180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23218180a562SAneesh Kumar K.V * represent total number of blocks in 23228180a562SAneesh Kumar K.V * file system block size 23238180a562SAneesh Kumar K.V */ 23240fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23250fc1b451SAneesh Kumar K.V 23260fc1b451SAneesh Kumar K.V } 23270fc1b451SAneesh Kumar K.V 23280fc1b451SAneesh Kumar K.V /* indirect blocks */ 23290fc1b451SAneesh Kumar K.V meta_blocks = 1; 23300fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23310fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23320fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23330fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23340fc1b451SAneesh Kumar K.V 23350fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23360fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2337ac27a0ecSDave Kleikamp 2338ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2339ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2340ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2341ac27a0ecSDave Kleikamp res <<= bits; 2342ac27a0ecSDave Kleikamp if (res > upper_limit) 2343ac27a0ecSDave Kleikamp res = upper_limit; 23440fc1b451SAneesh Kumar K.V 23450fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23460fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23470fc1b451SAneesh Kumar K.V 2348ac27a0ecSDave Kleikamp return res; 2349ac27a0ecSDave Kleikamp } 2350ac27a0ecSDave Kleikamp 2351617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 235270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2353ac27a0ecSDave Kleikamp { 2354617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2355fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2356ac27a0ecSDave Kleikamp int has_super = 0; 2357ac27a0ecSDave Kleikamp 2358ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2359ac27a0ecSDave Kleikamp 2360617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2361ac27a0ecSDave Kleikamp nr < first_meta_bg) 236270bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2363ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2364617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2365ac27a0ecSDave Kleikamp has_super = 1; 23660b8e58a1SAndreas Dilger 2367bd63f6b0SDarrick J. Wong /* 2368bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2369bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2370bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2371bd63f6b0SDarrick J. Wong * compensate. 2372bd63f6b0SDarrick J. Wong */ 2373bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2374bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2375bd63f6b0SDarrick J. Wong has_super++; 2376bd63f6b0SDarrick J. Wong 2377617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2378ac27a0ecSDave Kleikamp } 2379ac27a0ecSDave Kleikamp 2380c9de560dSAlex Tomas /** 2381c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2382c9de560dSAlex Tomas * @sbi: In memory super block info 2383c9de560dSAlex Tomas * 2384c9de560dSAlex Tomas * If we have specified it via mount option, then 2385c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2386c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2387c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2388c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2389c9de560dSAlex Tomas * 2390c9de560dSAlex Tomas */ 2391c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2392c9de560dSAlex Tomas { 2393c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2394c9de560dSAlex Tomas unsigned long stripe_width = 2395c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 23963eb08658SDan Ehrenberg int ret; 2397c9de560dSAlex Tomas 2398c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 23993eb08658SDan Ehrenberg ret = sbi->s_stripe; 24003eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24013eb08658SDan Ehrenberg ret = stripe_width; 24023eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24033eb08658SDan Ehrenberg ret = stride; 24043eb08658SDan Ehrenberg else 24053eb08658SDan Ehrenberg ret = 0; 2406c9de560dSAlex Tomas 24073eb08658SDan Ehrenberg /* 24083eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24093eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24103eb08658SDan Ehrenberg */ 24113eb08658SDan Ehrenberg if (ret <= 1) 24123eb08658SDan Ehrenberg ret = 0; 2413c9de560dSAlex Tomas 24143eb08658SDan Ehrenberg return ret; 2415c9de560dSAlex Tomas } 2416ac27a0ecSDave Kleikamp 24173197ebdbSTheodore Ts'o /* sysfs supprt */ 24183197ebdbSTheodore Ts'o 24193197ebdbSTheodore Ts'o struct ext4_attr { 24203197ebdbSTheodore Ts'o struct attribute attr; 24213197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24223197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24233197ebdbSTheodore Ts'o const char *, size_t); 2424f2d50a65SJan Kara union { 24253197ebdbSTheodore Ts'o int offset; 2426f2d50a65SJan Kara int deprecated_val; 2427f2d50a65SJan Kara } u; 24283197ebdbSTheodore Ts'o }; 24293197ebdbSTheodore Ts'o 243027dd4385SLukas Czerner static int parse_strtoull(const char *buf, 243127dd4385SLukas Czerner unsigned long long max, unsigned long long *value) 243227dd4385SLukas Czerner { 243327dd4385SLukas Czerner int ret; 243427dd4385SLukas Czerner 243527dd4385SLukas Czerner ret = kstrtoull(skip_spaces(buf), 0, value); 243627dd4385SLukas Czerner if (!ret && *value > max) 243727dd4385SLukas Czerner ret = -EINVAL; 243827dd4385SLukas Czerner return ret; 243927dd4385SLukas Czerner } 244027dd4385SLukas Czerner 24413197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24423197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24433197ebdbSTheodore Ts'o char *buf) 24443197ebdbSTheodore Ts'o { 24453197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24467b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24477b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24483197ebdbSTheodore Ts'o } 24493197ebdbSTheodore Ts'o 24503197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24513197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24523197ebdbSTheodore Ts'o { 24533197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24543197ebdbSTheodore Ts'o 2455f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2456f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24573197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24583197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24593197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24603197ebdbSTheodore Ts'o } 24613197ebdbSTheodore Ts'o 24623197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24633197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24643197ebdbSTheodore Ts'o { 24653197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24663197ebdbSTheodore Ts'o 2467f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2468f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24693197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2470a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24713197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2472a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24733197ebdbSTheodore Ts'o } 24743197ebdbSTheodore Ts'o 24753197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24763197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24773197ebdbSTheodore Ts'o const char *buf, size_t count) 24783197ebdbSTheodore Ts'o { 24793197ebdbSTheodore Ts'o unsigned long t; 2480e1091b15SLukas Czerner int ret; 24813197ebdbSTheodore Ts'o 2482e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2483e1091b15SLukas Czerner if (ret) 2484e1091b15SLukas Czerner return ret; 24853197ebdbSTheodore Ts'o 2486e1091b15SLukas Czerner if (t && (!is_power_of_2(t) || t > 0x40000000)) 24873197ebdbSTheodore Ts'o return -EINVAL; 24883197ebdbSTheodore Ts'o 24893197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24903197ebdbSTheodore Ts'o return count; 24913197ebdbSTheodore Ts'o } 24923197ebdbSTheodore Ts'o 24933197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24943197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24953197ebdbSTheodore Ts'o { 2496f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 24973197ebdbSTheodore Ts'o 24983197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24993197ebdbSTheodore Ts'o } 25003197ebdbSTheodore Ts'o 25013197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25023197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25033197ebdbSTheodore Ts'o const char *buf, size_t count) 25043197ebdbSTheodore Ts'o { 2505f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25063197ebdbSTheodore Ts'o unsigned long t; 2507e1091b15SLukas Czerner int ret; 25083197ebdbSTheodore Ts'o 2509e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2510e1091b15SLukas Czerner if (ret) 2511e1091b15SLukas Czerner return ret; 25123197ebdbSTheodore Ts'o *ui = t; 25133197ebdbSTheodore Ts'o return count; 25143197ebdbSTheodore Ts'o } 25153197ebdbSTheodore Ts'o 251652c198c6SLukas Czerner static ssize_t es_ui_show(struct ext4_attr *a, 251752c198c6SLukas Czerner struct ext4_sb_info *sbi, char *buf) 251852c198c6SLukas Czerner { 251952c198c6SLukas Czerner 252052c198c6SLukas Czerner unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) + 252152c198c6SLukas Czerner a->u.offset); 252252c198c6SLukas Czerner 252352c198c6SLukas Czerner return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 252452c198c6SLukas Czerner } 252552c198c6SLukas Czerner 252627dd4385SLukas Czerner static ssize_t reserved_clusters_show(struct ext4_attr *a, 252727dd4385SLukas Czerner struct ext4_sb_info *sbi, char *buf) 252827dd4385SLukas Czerner { 252927dd4385SLukas Czerner return snprintf(buf, PAGE_SIZE, "%llu\n", 253027dd4385SLukas Czerner (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); 253127dd4385SLukas Czerner } 253227dd4385SLukas Czerner 253327dd4385SLukas Czerner static ssize_t reserved_clusters_store(struct ext4_attr *a, 253427dd4385SLukas Czerner struct ext4_sb_info *sbi, 253527dd4385SLukas Czerner const char *buf, size_t count) 253627dd4385SLukas Czerner { 253727dd4385SLukas Czerner unsigned long long val; 253827dd4385SLukas Czerner int ret; 253927dd4385SLukas Czerner 254027dd4385SLukas Czerner if (parse_strtoull(buf, -1ULL, &val)) 254127dd4385SLukas Czerner return -EINVAL; 254227dd4385SLukas Czerner ret = ext4_reserve_clusters(sbi, val); 254327dd4385SLukas Czerner 254427dd4385SLukas Czerner return ret ? ret : count; 254527dd4385SLukas Czerner } 254627dd4385SLukas Czerner 25472c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25482c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25492c0544b2STheodore Ts'o const char *buf, size_t count) 25502c0544b2STheodore Ts'o { 25512c0544b2STheodore Ts'o int len = count; 25522c0544b2STheodore Ts'o 25532c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25542c0544b2STheodore Ts'o return -EPERM; 25552c0544b2STheodore Ts'o 25562c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25572c0544b2STheodore Ts'o len--; 25582c0544b2STheodore Ts'o 25592c0544b2STheodore Ts'o if (len) 25602c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25612c0544b2STheodore Ts'o return count; 25622c0544b2STheodore Ts'o } 25632c0544b2STheodore Ts'o 2564f2d50a65SJan Kara static ssize_t sbi_deprecated_show(struct ext4_attr *a, 2565f2d50a65SJan Kara struct ext4_sb_info *sbi, char *buf) 2566f2d50a65SJan Kara { 2567f2d50a65SJan Kara return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); 2568f2d50a65SJan Kara } 2569f2d50a65SJan Kara 25703197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25713197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25723197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25733197ebdbSTheodore Ts'o .show = _show, \ 25743197ebdbSTheodore Ts'o .store = _store, \ 2575f2d50a65SJan Kara .u = { \ 25763197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname),\ 2577f2d50a65SJan Kara }, \ 25783197ebdbSTheodore Ts'o } 257952c198c6SLukas Czerner 258052c198c6SLukas Czerner #define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \ 258152c198c6SLukas Czerner static struct ext4_attr ext4_attr_##_name = { \ 258252c198c6SLukas Czerner .attr = {.name = __stringify(_name), .mode = _mode }, \ 258352c198c6SLukas Czerner .show = _show, \ 258452c198c6SLukas Czerner .store = _store, \ 258552c198c6SLukas Czerner .u = { \ 258652c198c6SLukas Czerner .offset = offsetof(struct ext4_super_block, _elname), \ 258752c198c6SLukas Czerner }, \ 258852c198c6SLukas Czerner } 258952c198c6SLukas Czerner 25903197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25913197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 25923197ebdbSTheodore Ts'o 2593857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 25943197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 25953197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 259652c198c6SLukas Czerner 259752c198c6SLukas Czerner #define EXT4_RO_ATTR_ES_UI(name, elname) \ 259852c198c6SLukas Czerner EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname) 25993197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 26003197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 260152c198c6SLukas Czerner 26023197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 2603f2d50a65SJan Kara #define EXT4_DEPRECATED_ATTR(_name, _val) \ 2604f2d50a65SJan Kara static struct ext4_attr ext4_attr_##_name = { \ 2605f2d50a65SJan Kara .attr = {.name = __stringify(_name), .mode = 0444 }, \ 2606f2d50a65SJan Kara .show = sbi_deprecated_show, \ 2607f2d50a65SJan Kara .u = { \ 2608f2d50a65SJan Kara .deprecated_val = _val, \ 2609f2d50a65SJan Kara }, \ 2610f2d50a65SJan Kara } 26113197ebdbSTheodore Ts'o 26123197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 26133197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 26143197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 261527dd4385SLukas Czerner EXT4_RW_ATTR(reserved_clusters); 26163197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 26173197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 261811013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 26193197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 26203197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 26213197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 26223197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26233197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26243197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 2625f2d50a65SJan Kara EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); 262667a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 26272c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 2628efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 2629efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 2630efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 2631efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 2632efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 2633efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 263452c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 263552c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); 263652c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); 26373197ebdbSTheodore Ts'o 26383197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26393197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26403197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26413197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 264227dd4385SLukas Czerner ATTR_LIST(reserved_clusters), 26433197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 264411013911SAndreas Dilger ATTR_LIST(inode_goal), 26453197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26463197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26473197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26483197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26493197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26503197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 265155138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 265267a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 26532c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 2654efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 2655efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_burst), 2656efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 2657efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 2658efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 2659efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 266052c198c6SLukas Czerner ATTR_LIST(errors_count), 266152c198c6SLukas Czerner ATTR_LIST(first_error_time), 266252c198c6SLukas Czerner ATTR_LIST(last_error_time), 26633197ebdbSTheodore Ts'o NULL, 26643197ebdbSTheodore Ts'o }; 26653197ebdbSTheodore Ts'o 2666857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2667857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 266827ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 26695e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2670857ac889SLukas Czerner 2671857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2672857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 267327ee40dfSLukas Czerner ATTR_LIST(batched_discard), 26745e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2675857ac889SLukas Czerner NULL, 2676857ac889SLukas Czerner }; 2677857ac889SLukas Czerner 26783197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 26793197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 26803197ebdbSTheodore Ts'o { 26813197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26823197ebdbSTheodore Ts'o s_kobj); 26833197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26843197ebdbSTheodore Ts'o 26853197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 26863197ebdbSTheodore Ts'o } 26873197ebdbSTheodore Ts'o 26883197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 26893197ebdbSTheodore Ts'o struct attribute *attr, 26903197ebdbSTheodore Ts'o const char *buf, size_t len) 26913197ebdbSTheodore Ts'o { 26923197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26933197ebdbSTheodore Ts'o s_kobj); 26943197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26953197ebdbSTheodore Ts'o 26963197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 26973197ebdbSTheodore Ts'o } 26983197ebdbSTheodore Ts'o 26993197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 27003197ebdbSTheodore Ts'o { 27013197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27023197ebdbSTheodore Ts'o s_kobj); 27033197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 27043197ebdbSTheodore Ts'o } 27053197ebdbSTheodore Ts'o 270652cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 27073197ebdbSTheodore Ts'o .show = ext4_attr_show, 27083197ebdbSTheodore Ts'o .store = ext4_attr_store, 27093197ebdbSTheodore Ts'o }; 27103197ebdbSTheodore Ts'o 27113197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 27123197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 27133197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 27143197ebdbSTheodore Ts'o .release = ext4_sb_release, 27153197ebdbSTheodore Ts'o }; 27163197ebdbSTheodore Ts'o 2717857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2718857ac889SLukas Czerner { 2719857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2720857ac889SLukas Czerner } 2721857ac889SLukas Czerner 2722c7f72543SLukas Czerner static ssize_t ext4_feat_show(struct kobject *kobj, 2723c7f72543SLukas Czerner struct attribute *attr, char *buf) 2724c7f72543SLukas Czerner { 2725c7f72543SLukas Czerner return snprintf(buf, PAGE_SIZE, "supported\n"); 2726c7f72543SLukas Czerner } 2727c7f72543SLukas Czerner 2728c7f72543SLukas Czerner /* 2729c7f72543SLukas Czerner * We can not use ext4_attr_show/store because it relies on the kobject 2730c7f72543SLukas Czerner * being embedded in the ext4_sb_info structure which is definitely not 2731c7f72543SLukas Czerner * true in this case. 2732c7f72543SLukas Czerner */ 2733c7f72543SLukas Czerner static const struct sysfs_ops ext4_feat_ops = { 2734c7f72543SLukas Czerner .show = ext4_feat_show, 2735c7f72543SLukas Czerner .store = NULL, 2736c7f72543SLukas Czerner }; 2737c7f72543SLukas Czerner 2738857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2739857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2740c7f72543SLukas Czerner .sysfs_ops = &ext4_feat_ops, 2741857ac889SLukas Czerner .release = ext4_feat_release, 2742857ac889SLukas Czerner }; 2743857ac889SLukas Czerner 2744a13fb1a4SEric Sandeen /* 2745a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2746a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2747a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2748a13fb1a4SEric Sandeen * 0 if it cannot be. 2749a13fb1a4SEric Sandeen */ 2750a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2751a13fb1a4SEric Sandeen { 2752a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2753a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2754a13fb1a4SEric Sandeen "Couldn't mount because of " 2755a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2756a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2757a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2758a13fb1a4SEric Sandeen return 0; 2759a13fb1a4SEric Sandeen } 2760a13fb1a4SEric Sandeen 2761a13fb1a4SEric Sandeen if (readonly) 2762a13fb1a4SEric Sandeen return 1; 2763a13fb1a4SEric Sandeen 2764a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2765a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2766a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2767a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2768a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2769a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2770a13fb1a4SEric Sandeen return 0; 2771a13fb1a4SEric Sandeen } 2772a13fb1a4SEric Sandeen /* 2773a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2774a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2775a13fb1a4SEric Sandeen */ 2776a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2777a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2778a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2779a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2780a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2781a13fb1a4SEric Sandeen return 0; 2782a13fb1a4SEric Sandeen } 2783a13fb1a4SEric Sandeen } 2784bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2785bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2786bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2787bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2788bab08ab9STheodore Ts'o "extents feature\n"); 2789bab08ab9STheodore Ts'o return 0; 2790bab08ab9STheodore Ts'o } 27917c319d32SAditya Kali 27927c319d32SAditya Kali #ifndef CONFIG_QUOTA 27937c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 27947c319d32SAditya Kali !readonly) { 27957c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 27967c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 27977c319d32SAditya Kali "without CONFIG_QUOTA"); 27987c319d32SAditya Kali return 0; 27997c319d32SAditya Kali } 28007c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2801a13fb1a4SEric Sandeen return 1; 2802a13fb1a4SEric Sandeen } 2803a13fb1a4SEric Sandeen 280466e61a9eSTheodore Ts'o /* 280566e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 280666e61a9eSTheodore Ts'o * on the file system 280766e61a9eSTheodore Ts'o */ 280866e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 280966e61a9eSTheodore Ts'o { 281066e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 281166e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 281266e61a9eSTheodore Ts'o struct ext4_super_block *es; 281366e61a9eSTheodore Ts'o 281466e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 281566e61a9eSTheodore Ts'o es = sbi->s_es; 281666e61a9eSTheodore Ts'o 281766e61a9eSTheodore Ts'o if (es->s_error_count) 2818ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2819ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 282066e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 282166e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2822ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 282366e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 282466e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 282566e61a9eSTheodore Ts'o es->s_first_error_func, 282666e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 282766e61a9eSTheodore Ts'o if (es->s_first_error_ino) 282866e61a9eSTheodore Ts'o printk(": inode %u", 282966e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 283066e61a9eSTheodore Ts'o if (es->s_first_error_block) 283166e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 283266e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 283366e61a9eSTheodore Ts'o printk("\n"); 283466e61a9eSTheodore Ts'o } 283566e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2836ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 283766e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 283866e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 283966e61a9eSTheodore Ts'o es->s_last_error_func, 284066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 284166e61a9eSTheodore Ts'o if (es->s_last_error_ino) 284266e61a9eSTheodore Ts'o printk(": inode %u", 284366e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 284466e61a9eSTheodore Ts'o if (es->s_last_error_block) 284566e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 284666e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 284766e61a9eSTheodore Ts'o printk("\n"); 284866e61a9eSTheodore Ts'o } 284966e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 285066e61a9eSTheodore Ts'o } 285166e61a9eSTheodore Ts'o 2852bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2853bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2854bfff6873SLukas Czerner { 2855bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2856bfff6873SLukas Czerner ext4_group_t group, ngroups; 2857bfff6873SLukas Czerner struct super_block *sb; 2858bfff6873SLukas Czerner unsigned long timeout = 0; 2859bfff6873SLukas Czerner int ret = 0; 2860bfff6873SLukas Czerner 2861bfff6873SLukas Czerner sb = elr->lr_super; 2862bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2863bfff6873SLukas Czerner 28648e8ad8a5SJan Kara sb_start_write(sb); 2865bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2866bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2867bfff6873SLukas Czerner if (!gdp) { 2868bfff6873SLukas Czerner ret = 1; 2869bfff6873SLukas Czerner break; 2870bfff6873SLukas Czerner } 2871bfff6873SLukas Czerner 2872bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2873bfff6873SLukas Czerner break; 2874bfff6873SLukas Czerner } 2875bfff6873SLukas Czerner 28767f511862STheodore Ts'o if (group >= ngroups) 2877bfff6873SLukas Czerner ret = 1; 2878bfff6873SLukas Czerner 2879bfff6873SLukas Czerner if (!ret) { 2880bfff6873SLukas Czerner timeout = jiffies; 2881bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2882bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2883bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 288451ce6511SLukas Czerner timeout = (jiffies - timeout) * 288551ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2886bfff6873SLukas Czerner elr->lr_timeout = timeout; 2887bfff6873SLukas Czerner } 2888bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2889bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2890bfff6873SLukas Czerner } 28918e8ad8a5SJan Kara sb_end_write(sb); 2892bfff6873SLukas Czerner 2893bfff6873SLukas Czerner return ret; 2894bfff6873SLukas Czerner } 2895bfff6873SLukas Czerner 2896bfff6873SLukas Czerner /* 2897bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 28984ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2899bfff6873SLukas Czerner */ 2900bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2901bfff6873SLukas Czerner { 2902bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2903bfff6873SLukas Czerner 2904bfff6873SLukas Czerner if (!elr) 2905bfff6873SLukas Czerner return; 2906bfff6873SLukas Czerner 2907bfff6873SLukas Czerner sbi = elr->lr_sbi; 2908bfff6873SLukas Czerner 2909bfff6873SLukas Czerner list_del(&elr->lr_request); 2910bfff6873SLukas Czerner sbi->s_li_request = NULL; 2911bfff6873SLukas Czerner kfree(elr); 2912bfff6873SLukas Czerner } 2913bfff6873SLukas Czerner 2914bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2915bfff6873SLukas Czerner { 29161bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29171bb933fbSLukas Czerner if (!ext4_li_info) { 29181bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2919bfff6873SLukas Czerner return; 29201bb933fbSLukas Czerner } 2921bfff6873SLukas Czerner 2922bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29231bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2924bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29251bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2926bfff6873SLukas Czerner } 2927bfff6873SLukas Czerner 29288f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29298f1f7453SEric Sandeen 2930bfff6873SLukas Czerner /* 2931bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2932bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2933bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2934bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2935bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2936bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2937bfff6873SLukas Czerner * next waking time and put itself into sleep. 2938bfff6873SLukas Czerner */ 2939bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2940bfff6873SLukas Czerner { 2941bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2942bfff6873SLukas Czerner struct list_head *pos, *n; 2943bfff6873SLukas Czerner struct ext4_li_request *elr; 29444ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2945bfff6873SLukas Czerner 2946bfff6873SLukas Czerner BUG_ON(NULL == eli); 2947bfff6873SLukas Czerner 2948bfff6873SLukas Czerner cont_thread: 2949bfff6873SLukas Czerner while (true) { 2950bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2951bfff6873SLukas Czerner 2952bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2953bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2954bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2955bfff6873SLukas Czerner goto exit_thread; 2956bfff6873SLukas Czerner } 2957bfff6873SLukas Czerner 2958bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2959bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2960bfff6873SLukas Czerner lr_request); 2961bfff6873SLukas Czerner 2962b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2963b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2964b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2965bfff6873SLukas Czerner ext4_remove_li_request(elr); 2966bfff6873SLukas Czerner continue; 2967bfff6873SLukas Czerner } 2968b2c78cd0STheodore Ts'o } 2969bfff6873SLukas Czerner 2970bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2971bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2972bfff6873SLukas Czerner } 2973bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2974bfff6873SLukas Czerner 2975a0acae0eSTejun Heo try_to_freeze(); 2976bfff6873SLukas Czerner 29774ed5c033SLukas Czerner cur = jiffies; 29784ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2979f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2980bfff6873SLukas Czerner cond_resched(); 2981bfff6873SLukas Czerner continue; 2982bfff6873SLukas Czerner } 2983bfff6873SLukas Czerner 29844ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 29854ed5c033SLukas Czerner 29868f1f7453SEric Sandeen if (kthread_should_stop()) { 29878f1f7453SEric Sandeen ext4_clear_request_list(); 29888f1f7453SEric Sandeen goto exit_thread; 29898f1f7453SEric Sandeen } 2990bfff6873SLukas Czerner } 2991bfff6873SLukas Czerner 2992bfff6873SLukas Czerner exit_thread: 2993bfff6873SLukas Czerner /* 2994bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2995bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2996bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2997bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2998bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2999bfff6873SLukas Czerner * new one. 3000bfff6873SLukas Czerner */ 3001bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3002bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3003bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3004bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3005bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3006bfff6873SLukas Czerner goto cont_thread; 3007bfff6873SLukas Czerner } 3008bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3009bfff6873SLukas Czerner kfree(ext4_li_info); 3010bfff6873SLukas Czerner ext4_li_info = NULL; 3011bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3012bfff6873SLukas Czerner 3013bfff6873SLukas Czerner return 0; 3014bfff6873SLukas Czerner } 3015bfff6873SLukas Czerner 3016bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3017bfff6873SLukas Czerner { 3018bfff6873SLukas Czerner struct list_head *pos, *n; 3019bfff6873SLukas Czerner struct ext4_li_request *elr; 3020bfff6873SLukas Czerner 3021bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3022bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3023bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3024bfff6873SLukas Czerner lr_request); 3025bfff6873SLukas Czerner ext4_remove_li_request(elr); 3026bfff6873SLukas Czerner } 3027bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3028bfff6873SLukas Czerner } 3029bfff6873SLukas Czerner 3030bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3031bfff6873SLukas Czerner { 30328f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30338f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30348f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30358f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3036bfff6873SLukas Czerner ext4_clear_request_list(); 3037bfff6873SLukas Czerner kfree(ext4_li_info); 3038bfff6873SLukas Czerner ext4_li_info = NULL; 303992b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3040bfff6873SLukas Czerner "initialization thread\n", 3041bfff6873SLukas Czerner err); 3042bfff6873SLukas Czerner return err; 3043bfff6873SLukas Czerner } 3044bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3045bfff6873SLukas Czerner return 0; 3046bfff6873SLukas Czerner } 3047bfff6873SLukas Czerner 3048bfff6873SLukas Czerner /* 3049bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3050bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3051bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3052bfff6873SLukas Czerner * groups and return total number of groups. 3053bfff6873SLukas Czerner */ 3054bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3055bfff6873SLukas Czerner { 3056bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3057bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3058bfff6873SLukas Czerner 3059bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3060bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3061bfff6873SLukas Czerner if (!gdp) 3062bfff6873SLukas Czerner continue; 3063bfff6873SLukas Czerner 3064bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3065bfff6873SLukas Czerner break; 3066bfff6873SLukas Czerner } 3067bfff6873SLukas Czerner 3068bfff6873SLukas Czerner return group; 3069bfff6873SLukas Czerner } 3070bfff6873SLukas Czerner 3071bfff6873SLukas Czerner static int ext4_li_info_new(void) 3072bfff6873SLukas Czerner { 3073bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3074bfff6873SLukas Czerner 3075bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3076bfff6873SLukas Czerner if (!eli) 3077bfff6873SLukas Czerner return -ENOMEM; 3078bfff6873SLukas Czerner 3079bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3080bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3081bfff6873SLukas Czerner 3082bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3083bfff6873SLukas Czerner 3084bfff6873SLukas Czerner ext4_li_info = eli; 3085bfff6873SLukas Czerner 3086bfff6873SLukas Czerner return 0; 3087bfff6873SLukas Czerner } 3088bfff6873SLukas Czerner 3089bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3090bfff6873SLukas Czerner ext4_group_t start) 3091bfff6873SLukas Czerner { 3092bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3093bfff6873SLukas Czerner struct ext4_li_request *elr; 3094bfff6873SLukas Czerner 3095bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3096bfff6873SLukas Czerner if (!elr) 3097bfff6873SLukas Czerner return NULL; 3098bfff6873SLukas Czerner 3099bfff6873SLukas Czerner elr->lr_super = sb; 3100bfff6873SLukas Czerner elr->lr_sbi = sbi; 3101bfff6873SLukas Czerner elr->lr_next_group = start; 3102bfff6873SLukas Czerner 3103bfff6873SLukas Czerner /* 3104bfff6873SLukas Czerner * Randomize first schedule time of the request to 3105bfff6873SLukas Czerner * spread the inode table initialization requests 3106bfff6873SLukas Czerner * better. 3107bfff6873SLukas Czerner */ 3108dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3109dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3110bfff6873SLukas Czerner return elr; 3111bfff6873SLukas Czerner } 3112bfff6873SLukas Czerner 31137f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3114bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3115bfff6873SLukas Czerner { 3116bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31177f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3118bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 31196c5a6cb9SAndrew Morton int ret = 0; 3120bfff6873SLukas Czerner 31217f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 312251ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 312351ce6511SLukas Czerner /* 312451ce6511SLukas Czerner * Reset timeout so it can be computed again, because 312551ce6511SLukas Czerner * s_li_wait_mult might have changed. 312651ce6511SLukas Czerner */ 312751ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31287f511862STheodore Ts'o goto out; 312951ce6511SLukas Czerner } 3130bfff6873SLukas Czerner 3131bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3132bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 313355ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31347f511862STheodore Ts'o goto out; 3135bfff6873SLukas Czerner 3136bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31377f511862STheodore Ts'o if (!elr) { 31387f511862STheodore Ts'o ret = -ENOMEM; 31397f511862STheodore Ts'o goto out; 31407f511862STheodore Ts'o } 3141bfff6873SLukas Czerner 3142bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3143bfff6873SLukas Czerner ret = ext4_li_info_new(); 3144bfff6873SLukas Czerner if (ret) 3145bfff6873SLukas Czerner goto out; 3146bfff6873SLukas Czerner } 3147bfff6873SLukas Czerner 3148bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3149bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3150bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3151bfff6873SLukas Czerner 3152bfff6873SLukas Czerner sbi->s_li_request = elr; 315346e4690bSTao Ma /* 315446e4690bSTao Ma * set elr to NULL here since it has been inserted to 315546e4690bSTao Ma * the request_list and the removal and free of it is 315646e4690bSTao Ma * handled by ext4_clear_request_list from now on. 315746e4690bSTao Ma */ 315846e4690bSTao Ma elr = NULL; 3159bfff6873SLukas Czerner 3160bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3161bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3162bfff6873SLukas Czerner if (ret) 3163bfff6873SLukas Czerner goto out; 3164bfff6873SLukas Czerner } 3165bfff6873SLukas Czerner out: 3166bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3167beed5ecbSNicolas Kaiser if (ret) 3168bfff6873SLukas Czerner kfree(elr); 3169bfff6873SLukas Czerner return ret; 3170bfff6873SLukas Czerner } 3171bfff6873SLukas Czerner 3172bfff6873SLukas Czerner /* 3173bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3174bfff6873SLukas Czerner * module unload. 3175bfff6873SLukas Czerner */ 3176bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3177bfff6873SLukas Czerner { 3178bfff6873SLukas Czerner /* 3179bfff6873SLukas Czerner * If thread exited earlier 3180bfff6873SLukas Czerner * there's nothing to be done. 3181bfff6873SLukas Czerner */ 31828f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3183bfff6873SLukas Czerner return; 3184bfff6873SLukas Czerner 31858f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3186bfff6873SLukas Czerner } 3187bfff6873SLukas Czerner 318825ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 318925ed6e8aSDarrick J. Wong { 319025ed6e8aSDarrick J. Wong int ret = 1; 319125ed6e8aSDarrick J. Wong int compat, incompat; 319225ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 319325ed6e8aSDarrick J. Wong 31949aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3195db9ee220SDarrick J. Wong /* journal checksum v3 */ 319625ed6e8aSDarrick J. Wong compat = 0; 3197db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 319825ed6e8aSDarrick J. Wong } else { 319925ed6e8aSDarrick J. Wong /* journal checksum v1 */ 320025ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 320125ed6e8aSDarrick J. Wong incompat = 0; 320225ed6e8aSDarrick J. Wong } 320325ed6e8aSDarrick J. Wong 3204feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3205feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3206feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3207feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 320825ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 320925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 321025ed6e8aSDarrick J. Wong compat, 0, 321125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 321225ed6e8aSDarrick J. Wong incompat); 321325ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 321425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 321525ed6e8aSDarrick J. Wong compat, 0, 321625ed6e8aSDarrick J. Wong incompat); 321725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 321825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 321925ed6e8aSDarrick J. Wong } else { 3220feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3221feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 322225ed6e8aSDarrick J. Wong } 322325ed6e8aSDarrick J. Wong 322425ed6e8aSDarrick J. Wong return ret; 322525ed6e8aSDarrick J. Wong } 322625ed6e8aSDarrick J. Wong 3227952fc18eSTheodore Ts'o /* 3228952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3229952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3230952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3231952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3232952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3233952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3234952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3235952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3236952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3237952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3238952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3239952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3240952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3241952fc18eSTheodore Ts'o */ 3242952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3243952fc18eSTheodore Ts'o char *buf) 3244952fc18eSTheodore Ts'o { 3245952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3246952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3247952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3248952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3249952fc18eSTheodore Ts'o int s, j, count = 0; 3250952fc18eSTheodore Ts'o 32510548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 32520548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32530548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32540548bbb8STheodore Ts'o 3255952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3256952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3257952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3258952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3259952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3260952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3261952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3262952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3263952fc18eSTheodore Ts'o count++; 3264952fc18eSTheodore Ts'o } 3265952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3266952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3267952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3268952fc18eSTheodore Ts'o count++; 3269952fc18eSTheodore Ts'o } 3270952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3271952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3272952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3273952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3274952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3275952fc18eSTheodore Ts'o count++; 3276952fc18eSTheodore Ts'o } 3277952fc18eSTheodore Ts'o if (i != grp) 3278952fc18eSTheodore Ts'o continue; 3279952fc18eSTheodore Ts'o s = 0; 3280952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3281952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3282952fc18eSTheodore Ts'o count++; 3283952fc18eSTheodore Ts'o } 3284952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3285952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3286952fc18eSTheodore Ts'o count++; 3287952fc18eSTheodore Ts'o } 3288952fc18eSTheodore Ts'o } 3289952fc18eSTheodore Ts'o if (!count) 3290952fc18eSTheodore Ts'o return 0; 3291952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3292952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3293952fc18eSTheodore Ts'o } 3294952fc18eSTheodore Ts'o 3295952fc18eSTheodore Ts'o /* 3296952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3297952fc18eSTheodore Ts'o */ 3298952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3299952fc18eSTheodore Ts'o { 3300952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3301952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3302952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3303952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3304952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3305952fc18eSTheodore Ts'o 3306952fc18eSTheodore Ts'o if (!buf) 3307952fc18eSTheodore Ts'o return -ENOMEM; 3308952fc18eSTheodore Ts'o 3309952fc18eSTheodore Ts'o /* 3310952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3311952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3312952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3313952fc18eSTheodore Ts'o */ 3314952fc18eSTheodore Ts'o 3315952fc18eSTheodore Ts'o /* 3316952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3317952fc18eSTheodore Ts'o */ 3318952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3319952fc18eSTheodore Ts'o 3320952fc18eSTheodore Ts'o /* 3321952fc18eSTheodore Ts'o * Add the overhead found in each block group 3322952fc18eSTheodore Ts'o */ 3323952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3324952fc18eSTheodore Ts'o int blks; 3325952fc18eSTheodore Ts'o 3326952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3327952fc18eSTheodore Ts'o overhead += blks; 3328952fc18eSTheodore Ts'o if (blks) 3329952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3330952fc18eSTheodore Ts'o cond_resched(); 3331952fc18eSTheodore Ts'o } 33320875a2b4SEric Sandeen /* Add the journal blocks as well */ 33330875a2b4SEric Sandeen if (sbi->s_journal) 3334810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33350875a2b4SEric Sandeen 3336952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3337952fc18eSTheodore Ts'o smp_wmb(); 3338952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3339952fc18eSTheodore Ts'o return 0; 3340952fc18eSTheodore Ts'o } 3341952fc18eSTheodore Ts'o 334227dd4385SLukas Czerner 334330fac0f7SJan Kara static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) 334427dd4385SLukas Czerner { 334527dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 334627dd4385SLukas Czerner 334727dd4385SLukas Czerner /* 334830fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 334930fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 335030fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 335130fac0f7SJan Kara * to keep ext2/3 backward compatibility. 335230fac0f7SJan Kara */ 335330fac0f7SJan Kara if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 335430fac0f7SJan Kara return 0; 335530fac0f7SJan Kara /* 335627dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 335727dd4385SLukas Czerner * This should cover the situations where we can not afford to run 335827dd4385SLukas Czerner * out of space like for example punch hole, or converting 3359556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 336027dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 336127dd4385SLukas Czerner * very rare. 336227dd4385SLukas Czerner */ 336330fac0f7SJan Kara resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> 336430fac0f7SJan Kara EXT4_SB(sb)->s_cluster_bits; 336527dd4385SLukas Czerner 336627dd4385SLukas Czerner do_div(resv_clusters, 50); 336727dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 336827dd4385SLukas Czerner 336927dd4385SLukas Czerner return resv_clusters; 337027dd4385SLukas Czerner } 337127dd4385SLukas Czerner 337227dd4385SLukas Czerner 337327dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) 337427dd4385SLukas Czerner { 337527dd4385SLukas Czerner ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> 337627dd4385SLukas Czerner sbi->s_cluster_bits; 337727dd4385SLukas Czerner 337827dd4385SLukas Czerner if (count >= clusters) 337927dd4385SLukas Czerner return -EINVAL; 338027dd4385SLukas Czerner 338127dd4385SLukas Czerner atomic64_set(&sbi->s_resv_clusters, count); 338227dd4385SLukas Czerner return 0; 338327dd4385SLukas Czerner } 338427dd4385SLukas Czerner 3385617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3386ac27a0ecSDave Kleikamp { 3387d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3388ac27a0ecSDave Kleikamp struct buffer_head *bh; 3389617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3390617ba13bSMingming Cao struct ext4_sb_info *sbi; 3391617ba13bSMingming Cao ext4_fsblk_t block; 3392617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 339370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3394ac27a0ecSDave Kleikamp unsigned long offset = 0; 3395ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3396ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3397ac27a0ecSDave Kleikamp struct inode *root; 33989f6200bbSTheodore Ts'o char *cp; 33990390131bSFrank Mayhar const char *descr; 3400dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3401281b5995STheodore Ts'o int blocksize, clustersize; 34024ec11028STheodore Ts'o unsigned int db_count; 34034ec11028STheodore Ts'o unsigned int i; 3404281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3405bd81d8eeSLaurent Vivier __u64 blocks_count; 340607aa2ea1SLukas Czerner int err = 0; 3407b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3408bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3409ac27a0ecSDave Kleikamp 3410ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3411ac27a0ecSDave Kleikamp if (!sbi) 3412dcc7dae3SCyrill Gorcunov goto out_free_orig; 3413705895b6SPekka Enberg 3414705895b6SPekka Enberg sbi->s_blockgroup_lock = 3415705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3416705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3417705895b6SPekka Enberg kfree(sbi); 3418dcc7dae3SCyrill Gorcunov goto out_free_orig; 3419705895b6SPekka Enberg } 3420ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34212c0544b2STheodore Ts'o sbi->s_sb = sb; 3422240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3423d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3424f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3425f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3426f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3427ac27a0ecSDave Kleikamp 34289f6200bbSTheodore Ts'o /* Cleanup superblock name */ 34299f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 34309f6200bbSTheodore Ts'o *cp = '!'; 34319f6200bbSTheodore Ts'o 343207aa2ea1SLukas Czerner /* -EINVAL is default */ 3433dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3434617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3435ac27a0ecSDave Kleikamp if (!blocksize) { 3436b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3437ac27a0ecSDave Kleikamp goto out_fail; 3438ac27a0ecSDave Kleikamp } 3439ac27a0ecSDave Kleikamp 3440ac27a0ecSDave Kleikamp /* 3441617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3442ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3443ac27a0ecSDave Kleikamp */ 3444617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 344570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 344670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3447ac27a0ecSDave Kleikamp } else { 344870bbb3e0SAndrew Morton logical_sb_block = sb_block; 3449ac27a0ecSDave Kleikamp } 3450ac27a0ecSDave Kleikamp 3451a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3452b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3453ac27a0ecSDave Kleikamp goto out_fail; 3454ac27a0ecSDave Kleikamp } 3455ac27a0ecSDave Kleikamp /* 3456ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3457617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3458ac27a0ecSDave Kleikamp */ 34592716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3460ac27a0ecSDave Kleikamp sbi->s_es = es; 3461ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3462617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3463617ba13bSMingming Cao goto cantfind_ext4; 3464afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3465ac27a0ecSDave Kleikamp 3466feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3467feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3468feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3469feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3470feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3471feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3472feb0ab32SDarrick J. Wong 3473d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3474d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3475d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3476d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3477d25425f8SDarrick J. Wong silent = 1; 3478d25425f8SDarrick J. Wong goto cantfind_ext4; 3479d25425f8SDarrick J. Wong } 3480d25425f8SDarrick J. Wong 34810441984aSDarrick J. Wong /* Load the checksum driver */ 34820441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 34830441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 34840441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 34850441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 34860441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 34870441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 34880441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 34890441984aSDarrick J. Wong goto failed_mount; 34900441984aSDarrick J. Wong } 34910441984aSDarrick J. Wong } 34920441984aSDarrick J. Wong 3493a9c47317SDarrick J. Wong /* Check superblock checksum */ 3494a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3495a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3496a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3497a9c47317SDarrick J. Wong silent = 1; 3498a9c47317SDarrick J. Wong goto cantfind_ext4; 3499a9c47317SDarrick J. Wong } 3500a9c47317SDarrick J. Wong 3501a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 35029aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) 3503a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3504a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3505a9c47317SDarrick J. Wong 3506ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3507ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3508fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3509617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3510fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 351187f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3512fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3513617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3514fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3515ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3516fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 351703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3518fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35192e7842b8SHugh Dickins #endif 352098c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 352198c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 352298c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 352398c1a759SDarrick J. Wong 3524617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3525fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3526617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3527fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3528617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3529fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3530ac27a0ecSDave Kleikamp 3531617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3532fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3533bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3534fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3535bb4f397aSAneesh Kumar K.V else 3536fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 353745f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3538fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35398b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3540fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3541ac27a0ecSDave Kleikamp 354208cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 354308cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 354430773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 354530773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 354630773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3547ac27a0ecSDave Kleikamp 35488b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3549fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3550ac27a0ecSDave Kleikamp 35511e2462f9SMingming Cao /* 3552dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3553dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3554dd919b98SAneesh Kumar K.V */ 3555bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35568b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3557fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3558dd919b98SAneesh Kumar K.V 355951ce6511SLukas Czerner /* 356051ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 356151ce6511SLukas Czerner * no mount option specified. 356251ce6511SLukas Czerner */ 356351ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 356451ce6511SLukas Czerner 35658b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3566661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 35678b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35688b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35698b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 35708b67f04aSTheodore Ts'o } 35715a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3572b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3573661aa520SEric Sandeen &journal_ioprio, 0)) 3574ac27a0ecSDave Kleikamp goto failed_mount; 3575ac27a0ecSDave Kleikamp 357656889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 357756889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 357856889787STheodore Ts'o "with data=journal disables delayed " 357956889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 358056889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 358156889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 358256889787STheodore Ts'o "both data=journal and delalloc"); 358356889787STheodore Ts'o goto failed_mount; 358456889787STheodore Ts'o } 358556889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 358656889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 35876ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 358856889787STheodore Ts'o goto failed_mount; 358956889787STheodore Ts'o } 359056889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 359156889787STheodore Ts'o clear_opt(sb, DELALLOC); 359256889787STheodore Ts'o } 359356889787STheodore Ts'o 3594ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3595482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3596ac27a0ecSDave Kleikamp 3597617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3598617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3599617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3600617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3601b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3602b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3603b31e1552SEric Sandeen "running e2fsck is recommended"); 3604469108ffSTheodore Tso 3605ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3606ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3607ed3654ebSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, 3608ed3654ebSTheodore Ts'o EXT4_FEATURE_INCOMPAT_64BIT)) { 3609ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3610ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3611ed3654ebSTheodore Ts'o goto failed_mount; 3612ed3654ebSTheodore Ts'o } 3613ed3654ebSTheodore Ts'o } 3614ed3654ebSTheodore Ts'o 36152035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36162035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36172035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36182035e776STheodore Ts'o "using the ext4 subsystem"); 36192035e776STheodore Ts'o else { 36202035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36212035e776STheodore Ts'o "to feature incompatibilities"); 36222035e776STheodore Ts'o goto failed_mount; 36232035e776STheodore Ts'o } 36242035e776STheodore Ts'o } 36252035e776STheodore Ts'o 36262035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36272035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36282035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36292035e776STheodore Ts'o "using the ext4 subsystem"); 36302035e776STheodore Ts'o else { 36312035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36322035e776STheodore Ts'o "to feature incompatibilities"); 36332035e776STheodore Ts'o goto failed_mount; 36342035e776STheodore Ts'o } 36352035e776STheodore Ts'o } 36362035e776STheodore Ts'o 3637469108ffSTheodore Tso /* 3638ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3639ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3640ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3641ac27a0ecSDave Kleikamp */ 3642a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3643ac27a0ecSDave Kleikamp goto failed_mount; 3644a13fb1a4SEric Sandeen 3645261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3646617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3647617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3648b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3649b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3650ac27a0ecSDave Kleikamp goto failed_mount; 3651ac27a0ecSDave Kleikamp } 3652ac27a0ecSDave Kleikamp 3653ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3654ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3655ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3656b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3657ce40733cSAneesh Kumar K.V blocksize); 3658ac27a0ecSDave Kleikamp goto failed_mount; 3659ac27a0ecSDave Kleikamp } 3660ac27a0ecSDave Kleikamp 3661ac27a0ecSDave Kleikamp brelse(bh); 366270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 366370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3664a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3665ac27a0ecSDave Kleikamp if (!bh) { 3666b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3667b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3668ac27a0ecSDave Kleikamp goto failed_mount; 3669ac27a0ecSDave Kleikamp } 36702716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3671ac27a0ecSDave Kleikamp sbi->s_es = es; 3672617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3673b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3674b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3675ac27a0ecSDave Kleikamp goto failed_mount; 3676ac27a0ecSDave Kleikamp } 3677ac27a0ecSDave Kleikamp } 3678ac27a0ecSDave Kleikamp 3679a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3680a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3681f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3682f287a1a5STheodore Ts'o has_huge_files); 3683f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3684ac27a0ecSDave Kleikamp 3685617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3686617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3687617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3688ac27a0ecSDave Kleikamp } else { 3689ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3690ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3691617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 36921330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3693ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3694b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3695b31e1552SEric Sandeen "unsupported inode size: %d", 3696ac27a0ecSDave Kleikamp sbi->s_inode_size); 3697ac27a0ecSDave Kleikamp goto failed_mount; 3698ac27a0ecSDave Kleikamp } 3699ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3700ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3701ac27a0ecSDave Kleikamp } 37020b8e58a1SAndreas Dilger 37030d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 37040d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 37058fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 37060d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3707d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3708b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3709b31e1552SEric Sandeen "unsupported descriptor size %lu", 37100d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37110d1ee42fSAlexandre Ratchov goto failed_mount; 37120d1ee42fSAlexandre Ratchov } 37130d1ee42fSAlexandre Ratchov } else 37140d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37150b8e58a1SAndreas Dilger 3716ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3717ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3718b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3719617ba13bSMingming Cao goto cantfind_ext4; 37200b8e58a1SAndreas Dilger 3721617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3722ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3723617ba13bSMingming Cao goto cantfind_ext4; 3724ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3725ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37260d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3727ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3728ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3729e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3730e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37310b8e58a1SAndreas Dilger 3732ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3733ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3734ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 373523301410STheodore Ts'o if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { 3736f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3737f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3738f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3739f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3740f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 374123301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 374223301410STheodore Ts'o es->s_flags |= 374323301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3744f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3745f99b2589STheodore Ts'o #else 374623301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 374723301410STheodore Ts'o es->s_flags |= 374823301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3749f99b2589STheodore Ts'o #endif 3750f99b2589STheodore Ts'o } 375123301410STheodore Ts'o } 3752ac27a0ecSDave Kleikamp 3753281b5995STheodore Ts'o /* Handle clustersize */ 3754281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3755281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3756281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3757281b5995STheodore Ts'o if (has_bigalloc) { 3758281b5995STheodore Ts'o if (clustersize < blocksize) { 3759281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3760281b5995STheodore Ts'o "cluster size (%d) smaller than " 3761281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3762281b5995STheodore Ts'o goto failed_mount; 3763281b5995STheodore Ts'o } 3764281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3765281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3766281b5995STheodore Ts'o sbi->s_clusters_per_group = 3767281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3768281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3769281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3770281b5995STheodore Ts'o "#clusters per group too big: %lu", 3771281b5995STheodore Ts'o sbi->s_clusters_per_group); 3772281b5995STheodore Ts'o goto failed_mount; 3773281b5995STheodore Ts'o } 3774281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3775281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3776281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3777281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3778281b5995STheodore Ts'o sbi->s_blocks_per_group, 3779281b5995STheodore Ts'o sbi->s_clusters_per_group); 3780281b5995STheodore Ts'o goto failed_mount; 3781281b5995STheodore Ts'o } 3782281b5995STheodore Ts'o } else { 3783281b5995STheodore Ts'o if (clustersize != blocksize) { 3784281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3785281b5995STheodore Ts'o "block size (%d)", clustersize, 3786281b5995STheodore Ts'o blocksize); 3787281b5995STheodore Ts'o clustersize = blocksize; 3788281b5995STheodore Ts'o } 3789ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3790b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3791b31e1552SEric Sandeen "#blocks per group too big: %lu", 3792ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3793ac27a0ecSDave Kleikamp goto failed_mount; 3794ac27a0ecSDave Kleikamp } 3795281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3796281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3797281b5995STheodore Ts'o } 3798281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3799281b5995STheodore Ts'o 3800ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3801b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3802b31e1552SEric Sandeen "#inodes per group too big: %lu", 3803ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3804ac27a0ecSDave Kleikamp goto failed_mount; 3805ac27a0ecSDave Kleikamp } 3806ac27a0ecSDave Kleikamp 3807960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3808960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3809960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3810960fd856STheodore Ts'o 3811bf43d84bSEric Sandeen /* 3812bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3813bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3814bf43d84bSEric Sandeen */ 38155a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 381630ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38175a9ae68aSDarrick J. Wong if (err) { 3818b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3819bf43d84bSEric Sandeen " too large to mount safely on this system"); 3820ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 382190c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3822ac27a0ecSDave Kleikamp goto failed_mount; 3823ac27a0ecSDave Kleikamp } 3824ac27a0ecSDave Kleikamp 3825617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3826617ba13bSMingming Cao goto cantfind_ext4; 3827e7c95593SEric Sandeen 38280f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38290f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38300f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3831b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3832b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38330f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38340f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38350f2ddca6SFrom: Thiemo Nagel } 38360f2ddca6SFrom: Thiemo Nagel 38374ec11028STheodore Ts'o /* 38384ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38394ec11028STheodore Ts'o * of the filesystem. 38404ec11028STheodore Ts'o */ 38414ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3842b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3843b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3844e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38454ec11028STheodore Ts'o ext4_blocks_count(es)); 3846e7c95593SEric Sandeen goto failed_mount; 3847e7c95593SEric Sandeen } 3848bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3849bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3850bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3851bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 38524ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3853b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 38544ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3855b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 38564ec11028STheodore Ts'o ext4_blocks_count(es), 38574ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 38584ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 38594ec11028STheodore Ts'o goto failed_mount; 38604ec11028STheodore Ts'o } 3861bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3862fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3863fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3864617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3865617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3866f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3867f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3868ac27a0ecSDave Kleikamp GFP_KERNEL); 3869ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3870b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 38712cde417dSTheodore Ts'o ret = -ENOMEM; 3872ac27a0ecSDave Kleikamp goto failed_mount; 3873ac27a0ecSDave Kleikamp } 3874ac27a0ecSDave Kleikamp 38759f6200bbSTheodore Ts'o if (ext4_proc_root) 38769f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3877240799cdSTheodore Ts'o 387866acdcf4STheodore Ts'o if (sbi->s_proc) 387966acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 388066acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 388166acdcf4STheodore Ts'o 3882705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3883ac27a0ecSDave Kleikamp 3884ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 388570bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3886a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3887ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3888b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3889b31e1552SEric Sandeen "can't read group descriptor %d", i); 3890ac27a0ecSDave Kleikamp db_count = i; 3891ac27a0ecSDave Kleikamp goto failed_mount2; 3892ac27a0ecSDave Kleikamp } 3893ac27a0ecSDave Kleikamp } 3894bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3895b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3896f9ae9cf5STheodore Ts'o goto failed_mount2; 3897ac27a0ecSDave Kleikamp } 3898772cb7c8SJose R. Santos 3899f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3900ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3901ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3902ac27a0ecSDave Kleikamp 390304496411STao Ma init_timer(&sbi->s_err_report); 390404496411STao Ma sbi->s_err_report.function = print_daily_error_info; 390504496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 390604496411STao Ma 3907a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3908eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3909ce7e010aSTheodore Ts'o goto failed_mount3; 3910ce7e010aSTheodore Ts'o 3911c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 391267a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3913c9de560dSAlex Tomas 3914f9ae9cf5STheodore Ts'o /* 3915f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3916f9ae9cf5STheodore Ts'o */ 3917f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3918617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3919617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3920ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3921617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3922262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 39237c319d32SAditya Kali sb->s_qcop = &ext4_qctl_sysfile_operations; 3924262b4662SJan Kara else 3925262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3926ac27a0ecSDave Kleikamp #endif 3927f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3928f2fa2ffcSAneesh Kumar K.V 3929ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39303b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3931ac27a0ecSDave Kleikamp 3932ac27a0ecSDave Kleikamp sb->s_root = NULL; 3933ac27a0ecSDave Kleikamp 3934ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3935617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3936617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3937ac27a0ecSDave Kleikamp 3938c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3939c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3940c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 394150460fe8SDarrick J. Wong goto failed_mount3a; 3942c5e06d10SJohann Lombardi 3943ac27a0ecSDave Kleikamp /* 3944ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3945ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3946ac27a0ecSDave Kleikamp */ 3947ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3948617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3949617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 395050460fe8SDarrick J. Wong goto failed_mount3a; 39510390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 39520390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3953b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3954b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3955744692dcSJiaying Zhang goto failed_mount_wq; 3956ac27a0ecSDave Kleikamp } else { 3957fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 39580390131bSFrank Mayhar sbi->s_journal = NULL; 39590390131bSFrank Mayhar needs_recovery = 0; 39600390131bSFrank Mayhar goto no_journal; 3961ac27a0ecSDave Kleikamp } 3962ac27a0ecSDave Kleikamp 3963f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3964eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3965eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3966b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3967744692dcSJiaying Zhang goto failed_mount_wq; 3968eb40a09cSJose R. Santos } 3969eb40a09cSJose R. Santos 397025ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 397125ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 397225ed6e8aSDarrick J. Wong "feature set"); 397325ed6e8aSDarrick J. Wong goto failed_mount_wq; 3974d4da6c9cSLinus Torvalds } 3975818d276cSGirish Shilamkar 3976ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3977ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3978ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3979ac27a0ecSDave Kleikamp case 0: 3980ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 398163f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 398263f57933SAndrew Morton * cope, else JOURNAL_DATA 398363f57933SAndrew Morton */ 3984dab291afSMingming Cao if (jbd2_journal_check_available_features 3985dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3986fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3987ac27a0ecSDave Kleikamp else 3988fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3989ac27a0ecSDave Kleikamp break; 3990ac27a0ecSDave Kleikamp 3991617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3992617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3993dab291afSMingming Cao if (!jbd2_journal_check_available_features 3994dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3995b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3996b31e1552SEric Sandeen "requested data journaling mode"); 3997744692dcSJiaying Zhang goto failed_mount_wq; 3998ac27a0ecSDave Kleikamp } 3999ac27a0ecSDave Kleikamp default: 4000ac27a0ecSDave Kleikamp break; 4001ac27a0ecSDave Kleikamp } 4002b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4003ac27a0ecSDave Kleikamp 400418aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 400518aadd47SBobi Jam 4006ce7e010aSTheodore Ts'o no_journal: 40079c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 40089c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 40099c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40109c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40119c191f70ST Makphaibulchoke goto failed_mount_wq; 40129c191f70ST Makphaibulchoke } 40139c191f70ST Makphaibulchoke } 40149c191f70ST Makphaibulchoke 4015fd89d5f2STejun Heo /* 4016952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4017952fc18eSTheodore Ts'o * superblock if present. 4018952fc18eSTheodore Ts'o */ 4019952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4020952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4021952fc18eSTheodore Ts'o else { 402207aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 402307aa2ea1SLukas Czerner if (err) 4024952fc18eSTheodore Ts'o goto failed_mount_wq; 4025952fc18eSTheodore Ts'o } 4026952fc18eSTheodore Ts'o 4027952fc18eSTheodore Ts'o /* 4028fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4029fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4030fd89d5f2STejun Heo */ 40312e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40322e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40332e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40342e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 403507aa2ea1SLukas Czerner ret = -ENOMEM; 40362e8fa54eSJan Kara goto failed_mount4; 40372e8fa54eSJan Kara } 40382e8fa54eSJan Kara 4039ac27a0ecSDave Kleikamp /* 4040dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4041ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4042ac27a0ecSDave Kleikamp */ 4043ac27a0ecSDave Kleikamp 40441d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 40451d1fe1eeSDavid Howells if (IS_ERR(root)) { 4046b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 40471d1fe1eeSDavid Howells ret = PTR_ERR(root); 404832a9bb57SManish Katiyar root = NULL; 4049ac27a0ecSDave Kleikamp goto failed_mount4; 4050ac27a0ecSDave Kleikamp } 4051ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4052b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 405394bf608aSAl Viro iput(root); 4054ac27a0ecSDave Kleikamp goto failed_mount4; 4055ac27a0ecSDave Kleikamp } 405648fde701SAl Viro sb->s_root = d_make_root(root); 40571d1fe1eeSDavid Howells if (!sb->s_root) { 4058b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 40591d1fe1eeSDavid Howells ret = -ENOMEM; 40601d1fe1eeSDavid Howells goto failed_mount4; 40611d1fe1eeSDavid Howells } 4062ac27a0ecSDave Kleikamp 40637e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 40647e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4065ef7f3835SKalpak Shah 4066ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4067ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 4068ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4069ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4070ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 4071ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 4072ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4073ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4074ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4075ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4076ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4077ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4078ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4079ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4080ef7f3835SKalpak Shah } 4081ef7f3835SKalpak Shah } 4082ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4083ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4084ef7f3835SKalpak Shah sbi->s_inode_size) { 4085ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4086ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4087b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4088b31e1552SEric Sandeen "available"); 4089ef7f3835SKalpak Shah } 4090ef7f3835SKalpak Shah 409130fac0f7SJan Kara err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); 409227dd4385SLukas Czerner if (err) { 409327dd4385SLukas Czerner ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " 409430fac0f7SJan Kara "reserved pool", ext4_calculate_resv_clusters(sb)); 4095f9ae9cf5STheodore Ts'o goto failed_mount4a; 409627dd4385SLukas Czerner } 409727dd4385SLukas Czerner 40986fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 40996fd058f7STheodore Ts'o if (err) { 4100b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4101fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4102f9ae9cf5STheodore Ts'o goto failed_mount4a; 4103f9ae9cf5STheodore Ts'o } 4104f9ae9cf5STheodore Ts'o 4105f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4106f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4107f9ae9cf5STheodore Ts'o if (err) { 4108f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4109f9ae9cf5STheodore Ts'o err); 4110dcf2d804STao Ma goto failed_mount5; 4111c2774d84SAneesh Kumar K.V } 4112c2774d84SAneesh Kumar K.V 4113d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4114d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4115d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4116908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4117908c7f19STejun Heo GFP_KERNEL); 4118d5e03cbbSTheodore Ts'o if (!err) { 4119d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4120d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4121908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4122908c7f19STejun Heo GFP_KERNEL); 4123d5e03cbbSTheodore Ts'o } 4124d5e03cbbSTheodore Ts'o if (!err) 4125d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4126908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4127d5e03cbbSTheodore Ts'o if (!err) 4128908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4129908c7f19STejun Heo GFP_KERNEL); 4130d5e03cbbSTheodore Ts'o if (err) { 4131d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4132d5e03cbbSTheodore Ts'o goto failed_mount6; 4133d5e03cbbSTheodore Ts'o } 4134d5e03cbbSTheodore Ts'o 4135d5e03cbbSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 4136d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4137d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4138d5e03cbbSTheodore Ts'o "unable to initialize " 4139d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4140d5e03cbbSTheodore Ts'o goto failed_mount6; 4141d5e03cbbSTheodore Ts'o } 4142d5e03cbbSTheodore Ts'o 4143bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4144bfff6873SLukas Czerner if (err) 4145dcf2d804STao Ma goto failed_mount6; 4146bfff6873SLukas Czerner 41473197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 41483197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 41493197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 41503197ebdbSTheodore Ts'o "%s", sb->s_id); 4151dcf2d804STao Ma if (err) 4152dcf2d804STao Ma goto failed_mount7; 41533197ebdbSTheodore Ts'o 41549b2ff357SJan Kara #ifdef CONFIG_QUOTA 41559b2ff357SJan Kara /* Enable quota usage during mount. */ 41569b2ff357SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 41579b2ff357SJan Kara !(sb->s_flags & MS_RDONLY)) { 41589b2ff357SJan Kara err = ext4_enable_quotas(sb); 41599b2ff357SJan Kara if (err) 41609b2ff357SJan Kara goto failed_mount8; 41619b2ff357SJan Kara } 41629b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 41639b2ff357SJan Kara 4164617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4165617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4166617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 41670390131bSFrank Mayhar if (needs_recovery) { 4168b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4169617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 41700390131bSFrank Mayhar } 41710390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 41720390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 41730390131bSFrank Mayhar descr = " journalled data mode"; 41740390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 41750390131bSFrank Mayhar descr = " ordered data mode"; 41760390131bSFrank Mayhar else 41770390131bSFrank Mayhar descr = " writeback data mode"; 41780390131bSFrank Mayhar } else 41790390131bSFrank Mayhar descr = "out journal"; 41800390131bSFrank Mayhar 418179add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 418279add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 418379add3a3SLukas Czerner if (!blk_queue_discard(q)) 418479add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 418579add3a3SLukas Czerner "mounting with \"discard\" option, but " 418679add3a3SLukas Czerner "the device does not support discard"); 418779add3a3SLukas Czerner } 418879add3a3SLukas Czerner 4189d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 41908b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 41918b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4192ac27a0ecSDave Kleikamp 419366e61a9eSTheodore Ts'o if (es->s_error_count) 419466e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4195ac27a0ecSDave Kleikamp 4196efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4197efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4198efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4199efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4200efbed4dcSTheodore Ts'o 4201d4c402d9SCurt Wohlgemuth kfree(orig_data); 4202ac27a0ecSDave Kleikamp return 0; 4203ac27a0ecSDave Kleikamp 4204617ba13bSMingming Cao cantfind_ext4: 4205ac27a0ecSDave Kleikamp if (!silent) 4206b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4207ac27a0ecSDave Kleikamp goto failed_mount; 4208ac27a0ecSDave Kleikamp 420972ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 421072ba7450STheodore Ts'o failed_mount8: 421172ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 421272ba7450STheodore Ts'o #endif 4213dcf2d804STao Ma failed_mount7: 4214dcf2d804STao Ma ext4_unregister_li_request(sb); 4215dcf2d804STao Ma failed_mount6: 4216f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4217d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4218*b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4219d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4220d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4221d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4222d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 422300764937SAzat Khuzhin failed_mount5: 4224f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4225f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4226f9ae9cf5STheodore Ts'o failed_mount4a: 422794bf608aSAl Viro dput(sb->s_root); 422832a9bb57SManish Katiyar sb->s_root = NULL; 422994bf608aSAl Viro failed_mount4: 4230b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 42312e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 42322e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 42334c0425ffSMingming Cao failed_mount_wq: 42340390131bSFrank Mayhar if (sbi->s_journal) { 4235dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 423647b4a50bSJan Kara sbi->s_journal = NULL; 42370390131bSFrank Mayhar } 423850460fe8SDarrick J. Wong failed_mount3a: 4239d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4240eb68d0e2SZheng Liu failed_mount3: 42419105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4242c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4243c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4244ac27a0ecSDave Kleikamp failed_mount2: 4245ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4246ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4247*b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4248ac27a0ecSDave Kleikamp failed_mount: 42490441984aSDarrick J. Wong if (sbi->s_chksum_driver) 42500441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4251240799cdSTheodore Ts'o if (sbi->s_proc) { 425266acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 42539f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4254240799cdSTheodore Ts'o } 4255ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4256a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4257ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4258ac27a0ecSDave Kleikamp #endif 4259617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4260ac27a0ecSDave Kleikamp brelse(bh); 4261ac27a0ecSDave Kleikamp out_fail: 4262ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4263f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4264ac27a0ecSDave Kleikamp kfree(sbi); 4265dcc7dae3SCyrill Gorcunov out_free_orig: 4266d4c402d9SCurt Wohlgemuth kfree(orig_data); 426707aa2ea1SLukas Czerner return err ? err : ret; 4268ac27a0ecSDave Kleikamp } 4269ac27a0ecSDave Kleikamp 4270ac27a0ecSDave Kleikamp /* 4271ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4272ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4273ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4274ac27a0ecSDave Kleikamp */ 4275617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4276ac27a0ecSDave Kleikamp { 4277617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4278ac27a0ecSDave Kleikamp 4279ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 428030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 428130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4282ac27a0ecSDave Kleikamp 4283a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4284ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4285dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4286ac27a0ecSDave Kleikamp else 4287dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 42885bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 42895bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 42905bf5683aSHidehiro Kawai else 42915bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4292a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4293ac27a0ecSDave Kleikamp } 4294ac27a0ecSDave Kleikamp 4295617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4296ac27a0ecSDave Kleikamp unsigned int journal_inum) 4297ac27a0ecSDave Kleikamp { 4298ac27a0ecSDave Kleikamp struct inode *journal_inode; 4299ac27a0ecSDave Kleikamp journal_t *journal; 4300ac27a0ecSDave Kleikamp 43010390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43020390131bSFrank Mayhar 4303ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4304ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4305ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4306ac27a0ecSDave Kleikamp 43071d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43081d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4309b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4310ac27a0ecSDave Kleikamp return NULL; 4311ac27a0ecSDave Kleikamp } 4312ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4313ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4314ac27a0ecSDave Kleikamp iput(journal_inode); 4315b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4316ac27a0ecSDave Kleikamp return NULL; 4317ac27a0ecSDave Kleikamp } 4318ac27a0ecSDave Kleikamp 4319e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4320ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 43211d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4322b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4323ac27a0ecSDave Kleikamp iput(journal_inode); 4324ac27a0ecSDave Kleikamp return NULL; 4325ac27a0ecSDave Kleikamp } 4326ac27a0ecSDave Kleikamp 4327dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4328ac27a0ecSDave Kleikamp if (!journal) { 4329b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4330ac27a0ecSDave Kleikamp iput(journal_inode); 4331ac27a0ecSDave Kleikamp return NULL; 4332ac27a0ecSDave Kleikamp } 4333ac27a0ecSDave Kleikamp journal->j_private = sb; 4334617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4335ac27a0ecSDave Kleikamp return journal; 4336ac27a0ecSDave Kleikamp } 4337ac27a0ecSDave Kleikamp 4338617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4339ac27a0ecSDave Kleikamp dev_t j_dev) 4340ac27a0ecSDave Kleikamp { 4341ac27a0ecSDave Kleikamp struct buffer_head *bh; 4342ac27a0ecSDave Kleikamp journal_t *journal; 4343617ba13bSMingming Cao ext4_fsblk_t start; 4344617ba13bSMingming Cao ext4_fsblk_t len; 4345ac27a0ecSDave Kleikamp int hblock, blocksize; 4346617ba13bSMingming Cao ext4_fsblk_t sb_block; 4347ac27a0ecSDave Kleikamp unsigned long offset; 4348617ba13bSMingming Cao struct ext4_super_block *es; 4349ac27a0ecSDave Kleikamp struct block_device *bdev; 4350ac27a0ecSDave Kleikamp 43510390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43520390131bSFrank Mayhar 4353b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4354ac27a0ecSDave Kleikamp if (bdev == NULL) 4355ac27a0ecSDave Kleikamp return NULL; 4356ac27a0ecSDave Kleikamp 4357ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4358e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4359ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4360b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4361b31e1552SEric Sandeen "blocksize too small for journal device"); 4362ac27a0ecSDave Kleikamp goto out_bdev; 4363ac27a0ecSDave Kleikamp } 4364ac27a0ecSDave Kleikamp 4365617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4366617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4367ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4368ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4369b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4370b31e1552SEric Sandeen "external journal"); 4371ac27a0ecSDave Kleikamp goto out_bdev; 4372ac27a0ecSDave Kleikamp } 4373ac27a0ecSDave Kleikamp 43742716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4375617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4376ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4377617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4378b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4379b31e1552SEric Sandeen "bad superblock"); 4380ac27a0ecSDave Kleikamp brelse(bh); 4381ac27a0ecSDave Kleikamp goto out_bdev; 4382ac27a0ecSDave Kleikamp } 4383ac27a0ecSDave Kleikamp 4384df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4385df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4386df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4387df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4388df4763beSDarrick J. Wong "corrupt superblock"); 4389df4763beSDarrick J. Wong brelse(bh); 4390df4763beSDarrick J. Wong goto out_bdev; 4391df4763beSDarrick J. Wong } 4392df4763beSDarrick J. Wong 4393617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4394b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4395ac27a0ecSDave Kleikamp brelse(bh); 4396ac27a0ecSDave Kleikamp goto out_bdev; 4397ac27a0ecSDave Kleikamp } 4398ac27a0ecSDave Kleikamp 4399bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4400ac27a0ecSDave Kleikamp start = sb_block + 1; 4401ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4402ac27a0ecSDave Kleikamp 4403dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4404ac27a0ecSDave Kleikamp start, len, blocksize); 4405ac27a0ecSDave Kleikamp if (!journal) { 4406b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4407ac27a0ecSDave Kleikamp goto out_bdev; 4408ac27a0ecSDave Kleikamp } 4409ac27a0ecSDave Kleikamp journal->j_private = sb; 44109f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4411ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4412ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4413b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4414ac27a0ecSDave Kleikamp goto out_journal; 4415ac27a0ecSDave Kleikamp } 4416ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4417b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4418b31e1552SEric Sandeen "user (unsupported) - %d", 4419ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4420ac27a0ecSDave Kleikamp goto out_journal; 4421ac27a0ecSDave Kleikamp } 4422617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4423617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4424ac27a0ecSDave Kleikamp return journal; 44250b8e58a1SAndreas Dilger 4426ac27a0ecSDave Kleikamp out_journal: 4427dab291afSMingming Cao jbd2_journal_destroy(journal); 4428ac27a0ecSDave Kleikamp out_bdev: 4429617ba13bSMingming Cao ext4_blkdev_put(bdev); 4430ac27a0ecSDave Kleikamp return NULL; 4431ac27a0ecSDave Kleikamp } 4432ac27a0ecSDave Kleikamp 4433617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4434617ba13bSMingming Cao struct ext4_super_block *es, 4435ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4436ac27a0ecSDave Kleikamp { 4437ac27a0ecSDave Kleikamp journal_t *journal; 4438ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4439ac27a0ecSDave Kleikamp dev_t journal_dev; 4440ac27a0ecSDave Kleikamp int err = 0; 4441ac27a0ecSDave Kleikamp int really_read_only; 4442ac27a0ecSDave Kleikamp 44430390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44440390131bSFrank Mayhar 4445ac27a0ecSDave Kleikamp if (journal_devnum && 4446ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4447b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4448b31e1552SEric Sandeen "numbers have changed"); 4449ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4450ac27a0ecSDave Kleikamp } else 4451ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4452ac27a0ecSDave Kleikamp 4453ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4454ac27a0ecSDave Kleikamp 4455ac27a0ecSDave Kleikamp /* 4456ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4457ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4458ac27a0ecSDave Kleikamp * can get read-write access to the device. 4459ac27a0ecSDave Kleikamp */ 4460617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4461ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4462b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4463b31e1552SEric Sandeen "required on readonly filesystem"); 4464ac27a0ecSDave Kleikamp if (really_read_only) { 4465b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4466b31e1552SEric Sandeen "unavailable, cannot proceed"); 4467ac27a0ecSDave Kleikamp return -EROFS; 4468ac27a0ecSDave Kleikamp } 4469b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4470b31e1552SEric Sandeen "be enabled during recovery"); 4471ac27a0ecSDave Kleikamp } 4472ac27a0ecSDave Kleikamp } 4473ac27a0ecSDave Kleikamp 4474ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4475b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4476b31e1552SEric Sandeen "and inode journals!"); 4477ac27a0ecSDave Kleikamp return -EINVAL; 4478ac27a0ecSDave Kleikamp } 4479ac27a0ecSDave Kleikamp 4480ac27a0ecSDave Kleikamp if (journal_inum) { 4481617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4482ac27a0ecSDave Kleikamp return -EINVAL; 4483ac27a0ecSDave Kleikamp } else { 4484617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4485ac27a0ecSDave Kleikamp return -EINVAL; 4486ac27a0ecSDave Kleikamp } 4487ac27a0ecSDave Kleikamp 448890576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4489b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 44904776004fSTheodore Ts'o 4491617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4492dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 44931c13d5c0STheodore Ts'o if (!err) { 44941c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 44951c13d5c0STheodore Ts'o if (save) 44961c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 44971c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4498dab291afSMingming Cao err = jbd2_journal_load(journal); 44991c13d5c0STheodore Ts'o if (save) 45001c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 45011c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 45021c13d5c0STheodore Ts'o kfree(save); 45031c13d5c0STheodore Ts'o } 4504ac27a0ecSDave Kleikamp 4505ac27a0ecSDave Kleikamp if (err) { 4506b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4507dab291afSMingming Cao jbd2_journal_destroy(journal); 4508ac27a0ecSDave Kleikamp return err; 4509ac27a0ecSDave Kleikamp } 4510ac27a0ecSDave Kleikamp 4511617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4512617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4513ac27a0ecSDave Kleikamp 4514c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4515ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4516ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4517ac27a0ecSDave Kleikamp 4518ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4519e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4520ac27a0ecSDave Kleikamp } 4521ac27a0ecSDave Kleikamp 4522ac27a0ecSDave Kleikamp return 0; 4523ac27a0ecSDave Kleikamp } 4524ac27a0ecSDave Kleikamp 4525e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4526ac27a0ecSDave Kleikamp { 4527e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4528617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4529c4be0c1dSTakashi Sato int error = 0; 4530ac27a0ecSDave Kleikamp 45317c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4532c4be0c1dSTakashi Sato return error; 4533914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4534914258bfSTheodore Ts'o /* 4535914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4536914258bfSTheodore Ts'o * superblock failed. This could happen because the 4537914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4538914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4539914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4540914258bfSTheodore Ts'o * write and hope for the best. 4541914258bfSTheodore Ts'o */ 4542b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4543b31e1552SEric Sandeen "superblock detected"); 4544914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4545914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4546914258bfSTheodore Ts'o } 454771290b36STheodore Ts'o /* 454871290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 454971290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 455071290b36STheodore Ts'o * write time when we are mounting the root file system 455171290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 455271290b36STheodore Ts'o * for people who are east of GMT and who make their clock 455371290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 455471290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 455571290b36STheodore Ts'o * to complain and force a full file system check. 455671290b36STheodore Ts'o */ 455771290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4558ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4559f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4560afc32f7eSTheodore Ts'o es->s_kbytes_written = 4561afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4562afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4563afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4564f613dfcbSTheodore Ts'o else 4565f613dfcbSTheodore Ts'o es->s_kbytes_written = 4566f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4567d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 456857042651STheodore Ts'o ext4_free_blocks_count_set(es, 456957042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 457057042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4571d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 45727f93cff9STheodore Ts'o es->s_free_inodes_count = 45737f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 45745d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4575ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 457606db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4577ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4578914258bfSTheodore Ts'o if (sync) { 4579c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4580c4be0c1dSTakashi Sato if (error) 4581c4be0c1dSTakashi Sato return error; 4582c4be0c1dSTakashi Sato 4583c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4584c4be0c1dSTakashi Sato if (error) { 4585b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4586b31e1552SEric Sandeen "superblock"); 4587914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4588914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4589914258bfSTheodore Ts'o } 4590914258bfSTheodore Ts'o } 4591c4be0c1dSTakashi Sato return error; 4592ac27a0ecSDave Kleikamp } 4593ac27a0ecSDave Kleikamp 4594ac27a0ecSDave Kleikamp /* 4595ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4596ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4597ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4598ac27a0ecSDave Kleikamp */ 4599617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4600617ba13bSMingming Cao struct ext4_super_block *es) 4601ac27a0ecSDave Kleikamp { 4602617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4603ac27a0ecSDave Kleikamp 46040390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 46050390131bSFrank Mayhar BUG_ON(journal != NULL); 46060390131bSFrank Mayhar return; 46070390131bSFrank Mayhar } 4608dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46097ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 46107ffe1ea8SHidehiro Kawai goto out; 46117ffe1ea8SHidehiro Kawai 4612617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4613ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4614617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4615e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4616ac27a0ecSDave Kleikamp } 46177ffe1ea8SHidehiro Kawai 46187ffe1ea8SHidehiro Kawai out: 4619dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4620ac27a0ecSDave Kleikamp } 4621ac27a0ecSDave Kleikamp 4622ac27a0ecSDave Kleikamp /* 4623ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4624ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4625ac27a0ecSDave Kleikamp * main filesystem now. 4626ac27a0ecSDave Kleikamp */ 4627617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4628617ba13bSMingming Cao struct ext4_super_block *es) 4629ac27a0ecSDave Kleikamp { 4630ac27a0ecSDave Kleikamp journal_t *journal; 4631ac27a0ecSDave Kleikamp int j_errno; 4632ac27a0ecSDave Kleikamp const char *errstr; 4633ac27a0ecSDave Kleikamp 46340390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 46350390131bSFrank Mayhar 4636617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4637ac27a0ecSDave Kleikamp 4638ac27a0ecSDave Kleikamp /* 4639ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4640617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4641ac27a0ecSDave Kleikamp */ 4642ac27a0ecSDave Kleikamp 4643dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4644ac27a0ecSDave Kleikamp if (j_errno) { 4645ac27a0ecSDave Kleikamp char nbuf[16]; 4646ac27a0ecSDave Kleikamp 4647617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 464812062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4649ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 465012062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4651ac27a0ecSDave Kleikamp 4652617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4653617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4654e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4655ac27a0ecSDave Kleikamp 4656dab291afSMingming Cao jbd2_journal_clear_err(journal); 4657d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4658ac27a0ecSDave Kleikamp } 4659ac27a0ecSDave Kleikamp } 4660ac27a0ecSDave Kleikamp 4661ac27a0ecSDave Kleikamp /* 4662ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4663ac27a0ecSDave Kleikamp * and wait on the commit. 4664ac27a0ecSDave Kleikamp */ 4665617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4666ac27a0ecSDave Kleikamp { 4667ac27a0ecSDave Kleikamp journal_t *journal; 4668ac27a0ecSDave Kleikamp 4669ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4670ac27a0ecSDave Kleikamp return 0; 4671ac27a0ecSDave Kleikamp 4672617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4673b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4674ac27a0ecSDave Kleikamp } 4675ac27a0ecSDave Kleikamp 4676617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4677ac27a0ecSDave Kleikamp { 467814ce0cb4STheodore Ts'o int ret = 0; 46799eddacf9SJan Kara tid_t target; 468006a407f1SDmitry Monakhov bool needs_barrier = false; 46818d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4682ac27a0ecSDave Kleikamp 46839bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 46842e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4685a1177825SJan Kara /* 4686a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4687a1177825SJan Kara * no dirty dquots 4688a1177825SJan Kara */ 4689a1177825SJan Kara dquot_writeback_dquots(sb, -1); 469006a407f1SDmitry Monakhov /* 469106a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 469206a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 469306a407f1SDmitry Monakhov * transaction_commit will do it for us. 469406a407f1SDmitry Monakhov */ 4695bda32530STheodore Ts'o if (sbi->s_journal) { 469606a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 469706a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 469806a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 469906a407f1SDmitry Monakhov needs_barrier = true; 470006a407f1SDmitry Monakhov 47018d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4702ac27a0ecSDave Kleikamp if (wait) 4703bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4704bda32530STheodore Ts'o target); 47050390131bSFrank Mayhar } 4706bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4707bda32530STheodore Ts'o needs_barrier = true; 470806a407f1SDmitry Monakhov if (needs_barrier) { 470906a407f1SDmitry Monakhov int err; 471006a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 471106a407f1SDmitry Monakhov if (!ret) 471206a407f1SDmitry Monakhov ret = err; 471306a407f1SDmitry Monakhov } 471406a407f1SDmitry Monakhov 471506a407f1SDmitry Monakhov return ret; 471606a407f1SDmitry Monakhov } 471706a407f1SDmitry Monakhov 4718ac27a0ecSDave Kleikamp /* 4719ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4720ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4721be4f27d3SYongqiang Yang * 4722be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 47238e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 47248e8ad8a5SJan Kara * modifications. 4725ac27a0ecSDave Kleikamp */ 4726c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4727ac27a0ecSDave Kleikamp { 4728c4be0c1dSTakashi Sato int error = 0; 4729c4be0c1dSTakashi Sato journal_t *journal; 4730ac27a0ecSDave Kleikamp 47319ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47329ca92389STheodore Ts'o return 0; 47339ca92389STheodore Ts'o 4734c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4735ac27a0ecSDave Kleikamp 4736bb044576STheodore Ts'o if (journal) { 4737ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4738dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47397ffe1ea8SHidehiro Kawai 47407ffe1ea8SHidehiro Kawai /* 4741bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4742bb044576STheodore Ts'o * flush the journal. 47437ffe1ea8SHidehiro Kawai */ 4744c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 47456b0310fbSEric Sandeen if (error < 0) 47466b0310fbSEric Sandeen goto out; 4747bb044576STheodore Ts'o } 4748ac27a0ecSDave Kleikamp 4749ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4750617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4751e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 47526b0310fbSEric Sandeen out: 4753bb044576STheodore Ts'o if (journal) 47548e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4755bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 47566b0310fbSEric Sandeen return error; 4757ac27a0ecSDave Kleikamp } 4758ac27a0ecSDave Kleikamp 4759ac27a0ecSDave Kleikamp /* 4760ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4761ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4762ac27a0ecSDave Kleikamp */ 4763c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4764ac27a0ecSDave Kleikamp { 47659ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47669ca92389STheodore Ts'o return 0; 47679ca92389STheodore Ts'o 47689ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4769617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4770e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4771c4be0c1dSTakashi Sato return 0; 4772ac27a0ecSDave Kleikamp } 4773ac27a0ecSDave Kleikamp 4774673c6100STheodore Ts'o /* 4775673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4776673c6100STheodore Ts'o */ 4777673c6100STheodore Ts'o struct ext4_mount_options { 4778673c6100STheodore Ts'o unsigned long s_mount_opt; 4779a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 478008cefc7aSEric W. Biederman kuid_t s_resuid; 478108cefc7aSEric W. Biederman kgid_t s_resgid; 4782673c6100STheodore Ts'o unsigned long s_commit_interval; 4783673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4784673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4785673c6100STheodore Ts'o int s_jquota_fmt; 4786a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4787673c6100STheodore Ts'o #endif 4788673c6100STheodore Ts'o }; 4789673c6100STheodore Ts'o 4790617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4791ac27a0ecSDave Kleikamp { 4792617ba13bSMingming Cao struct ext4_super_block *es; 4793617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4794ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4795617ba13bSMingming Cao struct ext4_mount_options old_opts; 4796c79d967dSChristoph Hellwig int enable_quota = 0; 47978a266467STheodore Ts'o ext4_group_t g; 4798b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4799c5e06d10SJohann Lombardi int err = 0; 4800ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 480103dafb5fSChen Gang int i, j; 4802ac27a0ecSDave Kleikamp #endif 4803d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4804ac27a0ecSDave Kleikamp 4805ac27a0ecSDave Kleikamp /* Store the original options */ 4806ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4807ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4808a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4809ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4810ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4811ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 481230773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 481330773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4814ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4815ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4816a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 481703dafb5fSChen Gang if (sbi->s_qf_names[i]) { 481803dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 481903dafb5fSChen Gang GFP_KERNEL); 482003dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 482103dafb5fSChen Gang for (j = 0; j < i; j++) 482203dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 48233e36a163SWei Yongjun kfree(orig_data); 482403dafb5fSChen Gang return -ENOMEM; 482503dafb5fSChen Gang } 482603dafb5fSChen Gang } else 482703dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4828ac27a0ecSDave Kleikamp #endif 4829b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4830b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4831ac27a0ecSDave Kleikamp 4832ac27a0ecSDave Kleikamp /* 4833ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4834ac27a0ecSDave Kleikamp */ 4835661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4836ac27a0ecSDave Kleikamp err = -EINVAL; 4837ac27a0ecSDave Kleikamp goto restore_opts; 4838ac27a0ecSDave Kleikamp } 4839ac27a0ecSDave Kleikamp 48406b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 48416b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 48426b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 48436b992ff2SDarrick J. Wong "during remount not supported"); 48446b992ff2SDarrick J. Wong err = -EINVAL; 48456b992ff2SDarrick J. Wong goto restore_opts; 48466b992ff2SDarrick J. Wong } 48476b992ff2SDarrick J. Wong 48486ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 48496ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 48506ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48516ae6514bSPiotr Sarna "both data=journal and delalloc"); 48526ae6514bSPiotr Sarna err = -EINVAL; 48536ae6514bSPiotr Sarna goto restore_opts; 48546ae6514bSPiotr Sarna } 48556ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 48566ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48576ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 48586ae6514bSPiotr Sarna err = -EINVAL; 48596ae6514bSPiotr Sarna goto restore_opts; 48606ae6514bSPiotr Sarna } 48616ae6514bSPiotr Sarna } 48626ae6514bSPiotr Sarna 48634ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4864c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4865ac27a0ecSDave Kleikamp 4866ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4867482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4868ac27a0ecSDave Kleikamp 4869ac27a0ecSDave Kleikamp es = sbi->s_es; 4870ac27a0ecSDave Kleikamp 4871b3881f74STheodore Ts'o if (sbi->s_journal) { 4872617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4873b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4874b3881f74STheodore Ts'o } 4875ac27a0ecSDave Kleikamp 4876661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 48774ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4878ac27a0ecSDave Kleikamp err = -EROFS; 4879ac27a0ecSDave Kleikamp goto restore_opts; 4880ac27a0ecSDave Kleikamp } 4881ac27a0ecSDave Kleikamp 4882ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 488338c03b34STheodore Ts'o err = sync_filesystem(sb); 488438c03b34STheodore Ts'o if (err < 0) 488538c03b34STheodore Ts'o goto restore_opts; 48860f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 48870f0dd62fSChristoph Hellwig if (err < 0) 4888c79d967dSChristoph Hellwig goto restore_opts; 4889c79d967dSChristoph Hellwig 4890ac27a0ecSDave Kleikamp /* 4891ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4892ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4893ac27a0ecSDave Kleikamp */ 4894ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4895ac27a0ecSDave Kleikamp 4896ac27a0ecSDave Kleikamp /* 4897ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4898ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4899ac27a0ecSDave Kleikamp * mark the partition as valid again. 4900ac27a0ecSDave Kleikamp */ 4901617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4902617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4903ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4904ac27a0ecSDave Kleikamp 4905a63c9eb2STheodore Ts'o if (sbi->s_journal) 4906617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4907ac27a0ecSDave Kleikamp } else { 4908a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4909a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4910ac27a0ecSDave Kleikamp err = -EROFS; 4911ac27a0ecSDave Kleikamp goto restore_opts; 4912ac27a0ecSDave Kleikamp } 4913ead6596bSEric Sandeen /* 49148a266467STheodore Ts'o * Make sure the group descriptor checksums 49150b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 49168a266467STheodore Ts'o */ 49178a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 49188a266467STheodore Ts'o struct ext4_group_desc *gdp = 49198a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 49208a266467STheodore Ts'o 4921feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4922b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4923b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 49248a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 49258a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 49268a266467STheodore Ts'o err = -EINVAL; 49278a266467STheodore Ts'o goto restore_opts; 49288a266467STheodore Ts'o } 49298a266467STheodore Ts'o } 49308a266467STheodore Ts'o 49318a266467STheodore Ts'o /* 4932ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4933ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4934ead6596bSEric Sandeen * require a full umount/remount for now. 4935ead6596bSEric Sandeen */ 4936ead6596bSEric Sandeen if (es->s_last_orphan) { 4937b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4938ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4939ead6596bSEric Sandeen "orphan inode list. Please " 4940b31e1552SEric Sandeen "umount/remount instead"); 4941ead6596bSEric Sandeen err = -EINVAL; 4942ead6596bSEric Sandeen goto restore_opts; 4943ead6596bSEric Sandeen } 4944ead6596bSEric Sandeen 4945ac27a0ecSDave Kleikamp /* 4946ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4947ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4948ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4949ac27a0ecSDave Kleikamp * the partition.) 4950ac27a0ecSDave Kleikamp */ 49510390131bSFrank Mayhar if (sbi->s_journal) 4952617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4953ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4954617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4955ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4956c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4957c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4958c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4959c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4960c5e06d10SJohann Lombardi err = -EROFS; 4961c5e06d10SJohann Lombardi goto restore_opts; 4962c5e06d10SJohann Lombardi } 4963c79d967dSChristoph Hellwig enable_quota = 1; 4964ac27a0ecSDave Kleikamp } 4965ac27a0ecSDave Kleikamp } 4966bfff6873SLukas Czerner 4967bfff6873SLukas Czerner /* 4968bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4969bfff6873SLukas Czerner * current settings 4970bfff6873SLukas Czerner */ 4971bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4972bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4973bfff6873SLukas Czerner else { 4974bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4975bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4976bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4977bfff6873SLukas Czerner } 4978bfff6873SLukas Czerner 49796fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4980d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 4981e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 49820390131bSFrank Mayhar 4983ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4984ac27a0ecSDave Kleikamp /* Release old quota file names */ 4985a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4986ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 49877c319d32SAditya Kali if (enable_quota) { 49887c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 49890f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 49907c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 49917c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 49927c319d32SAditya Kali err = ext4_enable_quotas(sb); 499307724f98STheodore Ts'o if (err) 49947c319d32SAditya Kali goto restore_opts; 49957c319d32SAditya Kali } 49967c319d32SAditya Kali } 49977c319d32SAditya Kali #endif 4998d4c402d9SCurt Wohlgemuth 4999d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5000d4c402d9SCurt Wohlgemuth kfree(orig_data); 5001ac27a0ecSDave Kleikamp return 0; 50020b8e58a1SAndreas Dilger 5003ac27a0ecSDave Kleikamp restore_opts: 5004ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5005ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5006a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5007ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5008ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5009ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 501030773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 501130773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5012ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5013ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5014a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5015ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5016ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5017ac27a0ecSDave Kleikamp } 5018ac27a0ecSDave Kleikamp #endif 5019d4c402d9SCurt Wohlgemuth kfree(orig_data); 5020ac27a0ecSDave Kleikamp return err; 5021ac27a0ecSDave Kleikamp } 5022ac27a0ecSDave Kleikamp 5023617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5024ac27a0ecSDave Kleikamp { 5025ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5026617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5027617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 502827dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5029960cc398SPekka Enberg u64 fsid; 5030d02a9391SKazuya Mio s64 bfree; 503127dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5032ac27a0ecSDave Kleikamp 5033952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5034952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5035ac27a0ecSDave Kleikamp 5036617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5037ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5038b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 503957042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 504057042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5041d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 504257042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 504327dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 504427dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 504527dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5046ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5047ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 504852d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5049617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5050960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5051960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5052960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5053960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 50540b8e58a1SAndreas Dilger 5055ac27a0ecSDave Kleikamp return 0; 5056ac27a0ecSDave Kleikamp } 5057ac27a0ecSDave Kleikamp 50580b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 50590b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5060ac27a0ecSDave Kleikamp * Process 1 Process 2 5061617ba13bSMingming Cao * ext4_create() quota_sync() 5062dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5063871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5064dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5065ac27a0ecSDave Kleikamp * 5066ac27a0ecSDave Kleikamp */ 5067ac27a0ecSDave Kleikamp 5068ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5069ac27a0ecSDave Kleikamp 5070ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5071ac27a0ecSDave Kleikamp { 50724c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5073ac27a0ecSDave Kleikamp } 5074ac27a0ecSDave Kleikamp 5075617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5076ac27a0ecSDave Kleikamp { 5077ac27a0ecSDave Kleikamp int ret, err; 5078ac27a0ecSDave Kleikamp handle_t *handle; 5079ac27a0ecSDave Kleikamp struct inode *inode; 5080ac27a0ecSDave Kleikamp 5081ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 50829924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5083617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5084ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5085ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5086ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5087617ba13bSMingming Cao err = ext4_journal_stop(handle); 5088ac27a0ecSDave Kleikamp if (!ret) 5089ac27a0ecSDave Kleikamp ret = err; 5090ac27a0ecSDave Kleikamp return ret; 5091ac27a0ecSDave Kleikamp } 5092ac27a0ecSDave Kleikamp 5093617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5094ac27a0ecSDave Kleikamp { 5095ac27a0ecSDave Kleikamp int ret, err; 5096ac27a0ecSDave Kleikamp handle_t *handle; 5097ac27a0ecSDave Kleikamp 50989924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5099617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5100ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5101ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5102ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5103617ba13bSMingming Cao err = ext4_journal_stop(handle); 5104ac27a0ecSDave Kleikamp if (!ret) 5105ac27a0ecSDave Kleikamp ret = err; 5106ac27a0ecSDave Kleikamp return ret; 5107ac27a0ecSDave Kleikamp } 5108ac27a0ecSDave Kleikamp 5109617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5110ac27a0ecSDave Kleikamp { 5111ac27a0ecSDave Kleikamp int ret, err; 5112ac27a0ecSDave Kleikamp handle_t *handle; 5113ac27a0ecSDave Kleikamp 51149924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5115617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 51169c3013e9SJan Kara if (IS_ERR(handle)) { 51179c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 51189c3013e9SJan Kara dquot_release(dquot); 5119ac27a0ecSDave Kleikamp return PTR_ERR(handle); 51209c3013e9SJan Kara } 5121ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5122617ba13bSMingming Cao err = ext4_journal_stop(handle); 5123ac27a0ecSDave Kleikamp if (!ret) 5124ac27a0ecSDave Kleikamp ret = err; 5125ac27a0ecSDave Kleikamp return ret; 5126ac27a0ecSDave Kleikamp } 5127ac27a0ecSDave Kleikamp 5128617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5129ac27a0ecSDave Kleikamp { 5130262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5131262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5132262b4662SJan Kara 51332c8be6b2SJan Kara /* Are we journaling quotas? */ 5134262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 5135262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5136ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5137617ba13bSMingming Cao return ext4_write_dquot(dquot); 5138ac27a0ecSDave Kleikamp } else { 5139ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5140ac27a0ecSDave Kleikamp } 5141ac27a0ecSDave Kleikamp } 5142ac27a0ecSDave Kleikamp 5143617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5144ac27a0ecSDave Kleikamp { 5145ac27a0ecSDave Kleikamp int ret, err; 5146ac27a0ecSDave Kleikamp handle_t *handle; 5147ac27a0ecSDave Kleikamp 5148ac27a0ecSDave Kleikamp /* Data block + inode block */ 51499924a92aSTheodore Ts'o handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); 5150ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5151ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5152ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5153617ba13bSMingming Cao err = ext4_journal_stop(handle); 5154ac27a0ecSDave Kleikamp if (!ret) 5155ac27a0ecSDave Kleikamp ret = err; 5156ac27a0ecSDave Kleikamp return ret; 5157ac27a0ecSDave Kleikamp } 5158ac27a0ecSDave Kleikamp 5159ac27a0ecSDave Kleikamp /* 5160ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5161ac27a0ecSDave Kleikamp * the quota file and such... 5162ac27a0ecSDave Kleikamp */ 5163617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5164ac27a0ecSDave Kleikamp { 5165287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5166617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5167ac27a0ecSDave Kleikamp } 5168ac27a0ecSDave Kleikamp 5169ac27a0ecSDave Kleikamp /* 5170ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5171ac27a0ecSDave Kleikamp */ 5172617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5173f00c9e44SJan Kara struct path *path) 5174ac27a0ecSDave Kleikamp { 5175ac27a0ecSDave Kleikamp int err; 5176ac27a0ecSDave Kleikamp 5177ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5178ac27a0ecSDave Kleikamp return -EINVAL; 51790623543bSJan Kara 5180ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5181d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5182ac27a0ecSDave Kleikamp return -EXDEV; 51830623543bSJan Kara /* Journaling quota? */ 51840623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 51852b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5186f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5187b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5188b31e1552SEric Sandeen "Quota file not on filesystem root. " 5189b31e1552SEric Sandeen "Journaled quota will not work"); 51900623543bSJan Kara } 51910623543bSJan Kara 51920623543bSJan Kara /* 51930623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 51940623543bSJan Kara * all updates to the file when we bypass pagecache... 51950623543bSJan Kara */ 51960390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 5197f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 51980623543bSJan Kara /* 51990623543bSJan Kara * We don't need to lock updates but journal_flush() could 52000623543bSJan Kara * otherwise be livelocked... 52010623543bSJan Kara */ 52020623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 52037ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 52040623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5205f00c9e44SJan Kara if (err) 52067ffe1ea8SHidehiro Kawai return err; 52077ffe1ea8SHidehiro Kawai } 52080623543bSJan Kara 5209f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5210ac27a0ecSDave Kleikamp } 5211ac27a0ecSDave Kleikamp 52127c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 52137c319d32SAditya Kali unsigned int flags) 52147c319d32SAditya Kali { 52157c319d32SAditya Kali int err; 52167c319d32SAditya Kali struct inode *qf_inode; 5217a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52187c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52197c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52207c319d32SAditya Kali }; 52217c319d32SAditya Kali 52227c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 52237c319d32SAditya Kali 52247c319d32SAditya Kali if (!qf_inums[type]) 52257c319d32SAditya Kali return -EPERM; 52267c319d32SAditya Kali 52277c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 52287c319d32SAditya Kali if (IS_ERR(qf_inode)) { 52297c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 52307c319d32SAditya Kali return PTR_ERR(qf_inode); 52317c319d32SAditya Kali } 52327c319d32SAditya Kali 5233bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5234bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 52357c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 52367c319d32SAditya Kali iput(qf_inode); 52377c319d32SAditya Kali 52387c319d32SAditya Kali return err; 52397c319d32SAditya Kali } 52407c319d32SAditya Kali 52417c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 52427c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 52437c319d32SAditya Kali { 52447c319d32SAditya Kali int type, err = 0; 5245a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52467c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52477c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52487c319d32SAditya Kali }; 52497c319d32SAditya Kali 52507c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5251a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 52527c319d32SAditya Kali if (qf_inums[type]) { 52537c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 52547c319d32SAditya Kali DQUOT_USAGE_ENABLED); 52557c319d32SAditya Kali if (err) { 52567c319d32SAditya Kali ext4_warning(sb, 525772ba7450STheodore Ts'o "Failed to enable quota tracking " 525872ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 525972ba7450STheodore Ts'o "e2fsck to fix.", type, err); 52607c319d32SAditya Kali return err; 52617c319d32SAditya Kali } 52627c319d32SAditya Kali } 52637c319d32SAditya Kali } 52647c319d32SAditya Kali return 0; 52657c319d32SAditya Kali } 52667c319d32SAditya Kali 52677c319d32SAditya Kali /* 52687c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 52697c319d32SAditya Kali */ 52707c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 52717c319d32SAditya Kali int format_id) 52727c319d32SAditya Kali { 52737c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 52747c319d32SAditya Kali return -EINVAL; 52757c319d32SAditya Kali 52767c319d32SAditya Kali /* 52777c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 52787c319d32SAditya Kali */ 52797c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 52807c319d32SAditya Kali } 52817c319d32SAditya Kali 5282ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5283ca0e05e4SDmitry Monakhov { 528421f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 528521f97697SJan Kara handle_t *handle; 528621f97697SJan Kara 528787009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 528887009d86SDmitry Monakhov * Caller already holds s_umount sem */ 528987009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5290ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5291ca0e05e4SDmitry Monakhov 52920b268590SAmir Goldstein if (!inode) 52930b268590SAmir Goldstein goto out; 52940b268590SAmir Goldstein 529521f97697SJan Kara /* Update modification times of quota files when userspace can 529621f97697SJan Kara * start looking at them */ 52979924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 529821f97697SJan Kara if (IS_ERR(handle)) 529921f97697SJan Kara goto out; 530021f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 530121f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 530221f97697SJan Kara ext4_journal_stop(handle); 530321f97697SJan Kara 530421f97697SJan Kara out: 5305ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5306ca0e05e4SDmitry Monakhov } 5307ca0e05e4SDmitry Monakhov 53087c319d32SAditya Kali /* 53097c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 53107c319d32SAditya Kali */ 53117c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 53127c319d32SAditya Kali { 53137c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 53147c319d32SAditya Kali return -EINVAL; 53157c319d32SAditya Kali 53167c319d32SAditya Kali /* Disable only the limits. */ 53177c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 53187c319d32SAditya Kali } 53197c319d32SAditya Kali 5320ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5321ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5322ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5323ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5324617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5325ac27a0ecSDave Kleikamp size_t len, loff_t off) 5326ac27a0ecSDave Kleikamp { 5327ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5328725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5329ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5330ac27a0ecSDave Kleikamp int tocopy; 5331ac27a0ecSDave Kleikamp size_t toread; 5332ac27a0ecSDave Kleikamp struct buffer_head *bh; 5333ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5334ac27a0ecSDave Kleikamp 5335ac27a0ecSDave Kleikamp if (off > i_size) 5336ac27a0ecSDave Kleikamp return 0; 5337ac27a0ecSDave Kleikamp if (off+len > i_size) 5338ac27a0ecSDave Kleikamp len = i_size-off; 5339ac27a0ecSDave Kleikamp toread = len; 5340ac27a0ecSDave Kleikamp while (toread > 0) { 5341ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5342ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 53431c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 53441c215028STheodore Ts'o if (IS_ERR(bh)) 53451c215028STheodore Ts'o return PTR_ERR(bh); 5346ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5347ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5348ac27a0ecSDave Kleikamp else 5349ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5350ac27a0ecSDave Kleikamp brelse(bh); 5351ac27a0ecSDave Kleikamp offset = 0; 5352ac27a0ecSDave Kleikamp toread -= tocopy; 5353ac27a0ecSDave Kleikamp data += tocopy; 5354ac27a0ecSDave Kleikamp blk++; 5355ac27a0ecSDave Kleikamp } 5356ac27a0ecSDave Kleikamp return len; 5357ac27a0ecSDave Kleikamp } 5358ac27a0ecSDave Kleikamp 5359ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5360ac27a0ecSDave Kleikamp * enough credits) */ 5361617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5362ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5363ac27a0ecSDave Kleikamp { 5364ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5365725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 53661c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5367ac27a0ecSDave Kleikamp struct buffer_head *bh; 5368ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5369ac27a0ecSDave Kleikamp 53700390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5371b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5372b31e1552SEric Sandeen " cancelled because transaction is not started", 53739c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 53749c3013e9SJan Kara return -EIO; 53759c3013e9SJan Kara } 537667eeb568SDmitry Monakhov /* 537767eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 537867eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 537967eeb568SDmitry Monakhov */ 538067eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 538167eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 538267eeb568SDmitry Monakhov " cancelled because not block aligned", 538367eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 538467eeb568SDmitry Monakhov return -EIO; 538567eeb568SDmitry Monakhov } 538667eeb568SDmitry Monakhov 53871c215028STheodore Ts'o bh = ext4_bread(handle, inode, blk, 1); 53881c215028STheodore Ts'o if (IS_ERR(bh)) 53891c215028STheodore Ts'o return PTR_ERR(bh); 5390ac27a0ecSDave Kleikamp if (!bh) 5391ac27a0ecSDave Kleikamp goto out; 53925d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5393617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5394ac27a0ecSDave Kleikamp if (err) { 5395ac27a0ecSDave Kleikamp brelse(bh); 53961c215028STheodore Ts'o return err; 5397ac27a0ecSDave Kleikamp } 5398ac27a0ecSDave Kleikamp lock_buffer(bh); 539967eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5400ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5401ac27a0ecSDave Kleikamp unlock_buffer(bh); 54020390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5403ac27a0ecSDave Kleikamp brelse(bh); 5404ac27a0ecSDave Kleikamp out: 540567eeb568SDmitry Monakhov if (inode->i_size < off + len) { 540667eeb568SDmitry Monakhov i_size_write(inode, off + len); 5407617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5408617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 540921f97697SJan Kara } 541067eeb568SDmitry Monakhov return len; 5411ac27a0ecSDave Kleikamp } 5412ac27a0ecSDave Kleikamp 5413ac27a0ecSDave Kleikamp #endif 5414ac27a0ecSDave Kleikamp 5415152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5416152a0836SAl Viro const char *dev_name, void *data) 5417ac27a0ecSDave Kleikamp { 5418152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5419ac27a0ecSDave Kleikamp } 5420ac27a0ecSDave Kleikamp 542137f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 542224b58424STheodore Ts'o static inline void register_as_ext2(void) 542324b58424STheodore Ts'o { 542424b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 542524b58424STheodore Ts'o if (err) 542624b58424STheodore Ts'o printk(KERN_WARNING 542724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 542824b58424STheodore Ts'o } 542924b58424STheodore Ts'o 543024b58424STheodore Ts'o static inline void unregister_as_ext2(void) 543124b58424STheodore Ts'o { 543224b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 543324b58424STheodore Ts'o } 54342035e776STheodore Ts'o 54352035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 54362035e776STheodore Ts'o { 54372035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 54382035e776STheodore Ts'o return 0; 54392035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54402035e776STheodore Ts'o return 1; 54412035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 54422035e776STheodore Ts'o return 0; 54432035e776STheodore Ts'o return 1; 54442035e776STheodore Ts'o } 544524b58424STheodore Ts'o #else 544624b58424STheodore Ts'o static inline void register_as_ext2(void) { } 544724b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 54482035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 544924b58424STheodore Ts'o #endif 545024b58424STheodore Ts'o 545137f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 545224b58424STheodore Ts'o static inline void register_as_ext3(void) 545324b58424STheodore Ts'o { 545424b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 545524b58424STheodore Ts'o if (err) 545624b58424STheodore Ts'o printk(KERN_WARNING 545724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 545824b58424STheodore Ts'o } 545924b58424STheodore Ts'o 546024b58424STheodore Ts'o static inline void unregister_as_ext3(void) 546124b58424STheodore Ts'o { 546224b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 546324b58424STheodore Ts'o } 54642035e776STheodore Ts'o 54652035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 54662035e776STheodore Ts'o { 54672035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 54682035e776STheodore Ts'o return 0; 54692035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 54702035e776STheodore Ts'o return 0; 54712035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54722035e776STheodore Ts'o return 1; 54732035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 54742035e776STheodore Ts'o return 0; 54752035e776STheodore Ts'o return 1; 54762035e776STheodore Ts'o } 547724b58424STheodore Ts'o #else 547824b58424STheodore Ts'o static inline void register_as_ext3(void) { } 547924b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 54802035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 548124b58424STheodore Ts'o #endif 548224b58424STheodore Ts'o 548303010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5484ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 548503010a33STheodore Ts'o .name = "ext4", 5486152a0836SAl Viro .mount = ext4_mount, 5487ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5488ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5489ac27a0ecSDave Kleikamp }; 54907f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5491ac27a0ecSDave Kleikamp 54928f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5493857ac889SLukas Czerner { 5494857ac889SLukas Czerner struct ext4_features *ef; 5495857ac889SLukas Czerner int ret = -ENOMEM; 5496857ac889SLukas Czerner 5497857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5498857ac889SLukas Czerner if (!ef) 5499857ac889SLukas Czerner goto out; 5500857ac889SLukas Czerner 5501857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5502857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5503857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5504857ac889SLukas Czerner "features"); 5505857ac889SLukas Czerner if (ret) { 5506857ac889SLukas Czerner kfree(ef); 5507857ac889SLukas Czerner goto out; 5508857ac889SLukas Czerner } 5509857ac889SLukas Czerner 5510857ac889SLukas Czerner ext4_feat = ef; 5511857ac889SLukas Czerner ret = 0; 5512857ac889SLukas Czerner out: 5513857ac889SLukas Czerner return ret; 5514857ac889SLukas Czerner } 5515857ac889SLukas Czerner 55168f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 55178f021222SLukas Czerner { 55188f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 55198f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 55208f021222SLukas Czerner kfree(ext4_feat); 55218f021222SLukas Czerner } 55228f021222SLukas Czerner 5523e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5524e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5525e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5526e9e3bcecSEric Sandeen 55275dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5528ac27a0ecSDave Kleikamp { 5529e9e3bcecSEric Sandeen int i, err; 5530c9de560dSAlex Tomas 553107c0c5d8SAl Viro ext4_li_info = NULL; 553207c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 553307c0c5d8SAl Viro 55349a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 553512e9b892SDmitry Monakhov ext4_check_flag_values(); 5536e9e3bcecSEric Sandeen 5537e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5538e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5539e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5540e9e3bcecSEric Sandeen } 5541e9e3bcecSEric Sandeen 554251865fdaSZheng Liu err = ext4_init_es(); 55436fd058f7STheodore Ts'o if (err) 55446fd058f7STheodore Ts'o return err; 554551865fdaSZheng Liu 554651865fdaSZheng Liu err = ext4_init_pageio(); 554751865fdaSZheng Liu if (err) 554851865fdaSZheng Liu goto out7; 554951865fdaSZheng Liu 55505dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5551bd2d0210STheodore Ts'o if (err) 5552d44651d0SFabrice Jouhaud goto out6; 55533197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 55540e376b1eSTheodore Ts'o if (!ext4_kset) { 55550e376b1eSTheodore Ts'o err = -ENOMEM; 5556dd68314cSTheodore Ts'o goto out5; 55570e376b1eSTheodore Ts'o } 5558d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5559857ac889SLukas Czerner 5560857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5561dd68314cSTheodore Ts'o if (err) 5562dd68314cSTheodore Ts'o goto out4; 5563857ac889SLukas Czerner 55645dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5565ac27a0ecSDave Kleikamp if (err) 5566c9de560dSAlex Tomas goto out2; 55679c191f70ST Makphaibulchoke else 55689c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5569ac27a0ecSDave Kleikamp err = init_inodecache(); 5570ac27a0ecSDave Kleikamp if (err) 5571ac27a0ecSDave Kleikamp goto out1; 557224b58424STheodore Ts'o register_as_ext3(); 55732035e776STheodore Ts'o register_as_ext2(); 557403010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5575ac27a0ecSDave Kleikamp if (err) 5576ac27a0ecSDave Kleikamp goto out; 5577bfff6873SLukas Czerner 5578ac27a0ecSDave Kleikamp return 0; 5579ac27a0ecSDave Kleikamp out: 558024b58424STheodore Ts'o unregister_as_ext2(); 558124b58424STheodore Ts'o unregister_as_ext3(); 5582ac27a0ecSDave Kleikamp destroy_inodecache(); 5583ac27a0ecSDave Kleikamp out1: 55849c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 55855dabfc78STheodore Ts'o ext4_exit_mballoc(); 55869c191f70ST Makphaibulchoke out2: 55878f021222SLukas Czerner ext4_exit_feat_adverts(); 55886fd058f7STheodore Ts'o out4: 5589d44651d0SFabrice Jouhaud if (ext4_proc_root) 5590dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5591dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5592d44651d0SFabrice Jouhaud out5: 5593dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5594d44651d0SFabrice Jouhaud out6: 55955dabfc78STheodore Ts'o ext4_exit_pageio(); 559651865fdaSZheng Liu out7: 559751865fdaSZheng Liu ext4_exit_es(); 559851865fdaSZheng Liu 5599ac27a0ecSDave Kleikamp return err; 5600ac27a0ecSDave Kleikamp } 5601ac27a0ecSDave Kleikamp 56025dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5603ac27a0ecSDave Kleikamp { 5604bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 560524b58424STheodore Ts'o unregister_as_ext2(); 560624b58424STheodore Ts'o unregister_as_ext3(); 560703010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5608ac27a0ecSDave Kleikamp destroy_inodecache(); 56095dabfc78STheodore Ts'o ext4_exit_mballoc(); 56108f021222SLukas Czerner ext4_exit_feat_adverts(); 56119f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 56123197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 56135dabfc78STheodore Ts'o ext4_exit_system_zone(); 56145dabfc78STheodore Ts'o ext4_exit_pageio(); 5615dd12ed14SEric Sandeen ext4_exit_es(); 5616ac27a0ecSDave Kleikamp } 5617ac27a0ecSDave Kleikamp 5618ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 561983982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5620ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 56215dabfc78STheodore Ts'o module_init(ext4_init_fs) 56225dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5623