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; 337de1414a6SChristoph Hellwig struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 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]); 805b93b41d4SAl Viro kvfree(sbi->s_group_desc); 806b93b41d4SAl 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); 874edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 875eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 876edaa53caSZheng Liu ei->i_es_shk_nr = 0; 877dd475925SJan Kara ei->i_es_shrink_lblk = 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; 88696c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 887a9e7f447SDmitry Monakhov #endif 8888aefcd55STheodore Ts'o ei->jinode = NULL; 8892e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 890744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 891b436b9beSJan Kara ei->i_sync_tid = 0; 892b436b9beSJan Kara ei->i_datasync_tid = 0; 893f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 894e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 8952e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 8960b8e58a1SAndreas Dilger 897ac27a0ecSDave Kleikamp return &ei->vfs_inode; 898ac27a0ecSDave Kleikamp } 899ac27a0ecSDave Kleikamp 9007ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9017ff9c073STheodore Ts'o { 9027ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9037ff9c073STheodore Ts'o 9047ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9057ff9c073STheodore Ts'o return drop; 9067ff9c073STheodore Ts'o } 9077ff9c073STheodore Ts'o 908fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 909fa0d7e3dSNick Piggin { 910fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 911fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 912fa0d7e3dSNick Piggin } 913fa0d7e3dSNick Piggin 914617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 915ac27a0ecSDave Kleikamp { 9169f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 917b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 918b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 919b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9209f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9219f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9229f7dd93dSVasily Averin true); 9239f7dd93dSVasily Averin dump_stack(); 9249f7dd93dSVasily Averin } 925fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 926ac27a0ecSDave Kleikamp } 927ac27a0ecSDave Kleikamp 92851cc5068SAlexey Dobriyan static void init_once(void *foo) 929ac27a0ecSDave Kleikamp { 930617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 931ac27a0ecSDave Kleikamp 932ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 933ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9340e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 935ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 936ac27a0ecSDave Kleikamp } 937ac27a0ecSDave Kleikamp 938e67bc2b3SFabian Frederick static int __init init_inodecache(void) 939ac27a0ecSDave Kleikamp { 940617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 941617ba13bSMingming Cao sizeof(struct ext4_inode_info), 942ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 943ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 94420c2df83SPaul Mundt init_once); 945617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 946ac27a0ecSDave Kleikamp return -ENOMEM; 947ac27a0ecSDave Kleikamp return 0; 948ac27a0ecSDave Kleikamp } 949ac27a0ecSDave Kleikamp 950ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 951ac27a0ecSDave Kleikamp { 9528c0a8537SKirill A. Shutemov /* 9538c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 9548c0a8537SKirill A. Shutemov * destroy cache. 9558c0a8537SKirill A. Shutemov */ 9568c0a8537SKirill A. Shutemov rcu_barrier(); 957617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 958ac27a0ecSDave Kleikamp } 959ac27a0ecSDave Kleikamp 9600930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 961ac27a0ecSDave Kleikamp { 9620930fcc1SAl Viro invalidate_inode_buffers(inode); 963dbd5768fSJan Kara clear_inode(inode); 9649f754758SChristoph Hellwig dquot_drop(inode); 965c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 96651865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 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); 1049ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1050617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1051617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1052ac27a0ecSDave Kleikamp size_t len, loff_t off); 1053617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1054ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 10557c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 10567c319d32SAditya Kali unsigned int flags); 10577c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1058ac27a0ecSDave Kleikamp 105996c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 106096c7e0d9SJan Kara { 106196c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 106296c7e0d9SJan Kara } 106396c7e0d9SJan Kara 106461e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 106560e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1066617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1067617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1068617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1069617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1070a5b5ee32SJan Kara .write_info = ext4_write_info, 1071a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1072a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1073ac27a0ecSDave Kleikamp }; 1074ac27a0ecSDave Kleikamp 10750d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1076617ba13bSMingming Cao .quota_on = ext4_quota_on, 1077ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1078287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1079287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1080287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1081287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1082287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1083ac27a0ecSDave Kleikamp }; 1084ac27a0ecSDave Kleikamp #endif 1085ac27a0ecSDave Kleikamp 1086ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1087617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1088617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1089617ba13bSMingming Cao .write_inode = ext4_write_inode, 1090617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 10917ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 10920930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1093617ba13bSMingming Cao .put_super = ext4_put_super, 1094617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1095c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1096c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1097617ba13bSMingming Cao .statfs = ext4_statfs, 1098617ba13bSMingming Cao .remount_fs = ext4_remount, 1099617ba13bSMingming Cao .show_options = ext4_show_options, 1100ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1101617ba13bSMingming Cao .quota_read = ext4_quota_read, 1102617ba13bSMingming Cao .quota_write = ext4_quota_write, 110396c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1104ac27a0ecSDave Kleikamp #endif 1105c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1106ac27a0ecSDave Kleikamp }; 1107ac27a0ecSDave Kleikamp 110839655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11091b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11101b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1111617ba13bSMingming Cao .get_parent = ext4_get_parent, 1112ac27a0ecSDave Kleikamp }; 1113ac27a0ecSDave Kleikamp 1114ac27a0ecSDave Kleikamp enum { 1115ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1116ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 111772578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1118ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 111972578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1120ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1121ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1122ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1123296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1124ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11255a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1126ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1127*923ae0ffSRoss Zwisler Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_dax, 11281449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 11291449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11305328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1131744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1132fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1133c6d3d56dSDarrick J. Wong Opt_max_dir_size_kb, Opt_nojournal_checksum, 1134ac27a0ecSDave Kleikamp }; 1135ac27a0ecSDave Kleikamp 1136a447c093SSteven Whitehouse static const match_table_t tokens = { 1137ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1138ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1139ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1140ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1141ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1142ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1143ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1144ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1145ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1146ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1147ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1148ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1149ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1150ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 115172578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 115272578c33STheodore Ts'o {Opt_removed, "orlov"}, 1153ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1154ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1155ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1156ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1157e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11585a916be1STheodore Ts'o {Opt_noload, "noload"}, 115972578c33STheodore Ts'o {Opt_removed, "nobh"}, 116072578c33STheodore Ts'o {Opt_removed, "bh"}, 1161ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 116230773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 116330773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1164ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1165ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1166818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1167c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1168818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1169ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1170ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1171ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1172ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11735bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11745bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1175ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1176ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1177ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1178ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1179ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1180ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 11815a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1182ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1183ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1184ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1185ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1186ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 118706705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 118806705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 118925ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1190*923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1191c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 119264769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1193dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 119436ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 119536ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 11966fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 11976fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1198240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1199b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1200afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 120106705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 120206705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1203744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1204744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12055328e635SEric Sandeen {Opt_discard, "discard"}, 12065328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1207fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1208fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1209fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1210df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1211c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1212c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1213c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1214c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1215c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1216f3f12faaSJosef Bacik {Opt_err, NULL}, 1217ac27a0ecSDave Kleikamp }; 1218ac27a0ecSDave Kleikamp 1219617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1220ac27a0ecSDave Kleikamp { 1221617ba13bSMingming Cao ext4_fsblk_t sb_block; 1222ac27a0ecSDave Kleikamp char *options = (char *) *data; 1223ac27a0ecSDave Kleikamp 1224ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1225ac27a0ecSDave Kleikamp return 1; /* Default location */ 12260b8e58a1SAndreas Dilger 1227ac27a0ecSDave Kleikamp options += 3; 12280b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1229ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1230ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12314776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1232ac27a0ecSDave Kleikamp (char *) *data); 1233ac27a0ecSDave Kleikamp return 1; 1234ac27a0ecSDave Kleikamp } 1235ac27a0ecSDave Kleikamp if (*options == ',') 1236ac27a0ecSDave Kleikamp options++; 1237ac27a0ecSDave Kleikamp *data = (void *) options; 12380b8e58a1SAndreas Dilger 1239ac27a0ecSDave Kleikamp return sb_block; 1240ac27a0ecSDave Kleikamp } 1241ac27a0ecSDave Kleikamp 1242b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1243437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1244437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1245b3881f74STheodore Ts'o 124656c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 124756c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 124856c50f11SDmitry Monakhov { 124956c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 125056c50f11SDmitry Monakhov char *qname; 125103dafb5fSChen Gang int ret = -1; 125256c50f11SDmitry Monakhov 125356c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 125456c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 125556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 125656c50f11SDmitry Monakhov "Cannot change journaled " 125756c50f11SDmitry Monakhov "quota options when quota turned on"); 125857f73c2cSTheodore Ts'o return -1; 125956c50f11SDmitry Monakhov } 1260262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1261262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1262262b4662SJan Kara "when QUOTA feature is enabled"); 1263262b4662SJan Kara return -1; 1264262b4662SJan Kara } 126556c50f11SDmitry Monakhov qname = match_strdup(args); 126656c50f11SDmitry Monakhov if (!qname) { 126756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 126856c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 126957f73c2cSTheodore Ts'o return -1; 127056c50f11SDmitry Monakhov } 127103dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 127203dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 127303dafb5fSChen Gang ret = 1; 127403dafb5fSChen Gang else 127556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127603dafb5fSChen Gang "%s quota file already specified", 127703dafb5fSChen Gang QTYPE2NAME(qtype)); 127803dafb5fSChen Gang goto errout; 127956c50f11SDmitry Monakhov } 128003dafb5fSChen Gang if (strchr(qname, '/')) { 128156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128256c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 128303dafb5fSChen Gang goto errout; 128456c50f11SDmitry Monakhov } 128503dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1286fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 128756c50f11SDmitry Monakhov return 1; 128803dafb5fSChen Gang errout: 128903dafb5fSChen Gang kfree(qname); 129003dafb5fSChen Gang return ret; 129156c50f11SDmitry Monakhov } 129256c50f11SDmitry Monakhov 129356c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 129456c50f11SDmitry Monakhov { 129556c50f11SDmitry Monakhov 129656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 129756c50f11SDmitry Monakhov 129856c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 129956c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 130056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 130156c50f11SDmitry Monakhov " when quota turned on"); 130257f73c2cSTheodore Ts'o return -1; 130356c50f11SDmitry Monakhov } 130403dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 130556c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 130656c50f11SDmitry Monakhov return 1; 130756c50f11SDmitry Monakhov } 130856c50f11SDmitry Monakhov #endif 130956c50f11SDmitry Monakhov 131026092bf5STheodore Ts'o #define MOPT_SET 0x0001 131126092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 131226092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 131326092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 131426092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 131526092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 131626092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 131726092bf5STheodore Ts'o #define MOPT_Q 0 131826092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 131926092bf5STheodore Ts'o #else 132026092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 132126092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 132226092bf5STheodore Ts'o #endif 132326092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13248dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13258dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13268dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1327ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 132826092bf5STheodore Ts'o 132926092bf5STheodore Ts'o static const struct mount_opts { 133026092bf5STheodore Ts'o int token; 133126092bf5STheodore Ts'o int mount_opt; 133226092bf5STheodore Ts'o int flags; 133326092bf5STheodore Ts'o } ext4_mount_opts[] = { 133426092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 133526092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 133626092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 133726092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 133826092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 133926092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13408dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13418dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13428dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13438dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 134426092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 134526092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13468dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13478dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13488dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 134959d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1350c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1351c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 13528dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 13538dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 135426092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13558dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 13568dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13578dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 135826092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 135926092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 136026092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13618dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13628dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13638dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13648dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 136526092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 136626092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 136726092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 136826092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 136926092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 137026092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 137126092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 137226092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 137326092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 137426092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1375*923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 137626092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 13770efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 13780efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 13790efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 1380ad4eec61SEric Sandeen {Opt_journal_path, 0, MOPT_STRING}, 13810efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 13828dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13838dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13848dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 13858dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 138626092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 138726092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 138826092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 138926092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 139026092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 139126092bf5STheodore Ts'o #else 139226092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 139326092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 139426092bf5STheodore Ts'o #endif 139526092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 139626092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 139726092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 139826092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 139926092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 140026092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 140126092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 140226092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 140326092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 140426092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 140526092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 140626092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 140726092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 140826092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 140926092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 141026092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1411df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 141226092bf5STheodore Ts'o {Opt_err, 0, 0} 141326092bf5STheodore Ts'o }; 141426092bf5STheodore Ts'o 141526092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 141626092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 141726092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 141826092bf5STheodore Ts'o { 141926092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 142026092bf5STheodore Ts'o const struct mount_opts *m; 142108cefc7aSEric W. Biederman kuid_t uid; 142208cefc7aSEric W. Biederman kgid_t gid; 142326092bf5STheodore Ts'o int arg = 0; 142426092bf5STheodore Ts'o 142557f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 142657f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 142757f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 142857f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 142957f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 143057f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 143157f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 143257f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 143357f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 143457f73c2cSTheodore Ts'o #endif 143526092bf5STheodore Ts'o switch (token) { 1436f7048605STheodore Ts'o case Opt_noacl: 1437f7048605STheodore Ts'o case Opt_nouser_xattr: 1438f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1439f7048605STheodore Ts'o break; 144026092bf5STheodore Ts'o case Opt_sb: 144126092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 144226092bf5STheodore Ts'o case Opt_removed: 14435f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 144426092bf5STheodore Ts'o return 1; 144526092bf5STheodore Ts'o case Opt_abort: 144626092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 144726092bf5STheodore Ts'o return 1; 144826092bf5STheodore Ts'o case Opt_i_version: 144926092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 145026092bf5STheodore Ts'o return 1; 145126092bf5STheodore Ts'o } 145226092bf5STheodore Ts'o 14535f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14545f3633e3SJan Kara if (token == m->token) 14555f3633e3SJan Kara break; 14565f3633e3SJan Kara 14575f3633e3SJan Kara if (m->token == Opt_err) { 14585f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 14595f3633e3SJan Kara "or missing value", opt); 14605f3633e3SJan Kara return -1; 14615f3633e3SJan Kara } 14625f3633e3SJan Kara 14638dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 14648dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14658dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 14668dc0aa8cSTheodore Ts'o return -1; 14678dc0aa8cSTheodore Ts'o } 14688dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 14698dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14708dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 14718dc0aa8cSTheodore Ts'o return -1; 14728dc0aa8cSTheodore Ts'o } 14738dc0aa8cSTheodore Ts'o 1474ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 14750efb3b23SJan Kara return -1; 147626092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 147726092bf5STheodore Ts'o return -1; 147826092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 147926092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 148026092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 148126092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 148226092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 148326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 148426092bf5STheodore Ts'o "options when quota turned on"); 148526092bf5STheodore Ts'o return -1; 148626092bf5STheodore Ts'o } 148726092bf5STheodore Ts'o 148826092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 148926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 149026092bf5STheodore Ts'o } else if (token == Opt_commit) { 149126092bf5STheodore Ts'o if (arg == 0) 149226092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 149326092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 149426092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 149526092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 149626092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 149726092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 149826092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1499e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1500e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1501e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1502e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 150326092bf5STheodore Ts'o return -1; 150426092bf5STheodore Ts'o } 150526092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 150626092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 150726092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 150826092bf5STheodore Ts'o if (!args->from) 150926092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 151026092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1511df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1512df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 151326092bf5STheodore Ts'o } else if (token == Opt_stripe) { 151426092bf5STheodore Ts'o sbi->s_stripe = arg; 15150efb3b23SJan Kara } else if (token == Opt_resuid) { 15160efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15170efb3b23SJan Kara if (!uid_valid(uid)) { 15185f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15190efb3b23SJan Kara return -1; 15200efb3b23SJan Kara } 15210efb3b23SJan Kara sbi->s_resuid = uid; 15220efb3b23SJan Kara } else if (token == Opt_resgid) { 15230efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15240efb3b23SJan Kara if (!gid_valid(gid)) { 15255f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15260efb3b23SJan Kara return -1; 15270efb3b23SJan Kara } 15280efb3b23SJan Kara sbi->s_resgid = gid; 15290efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15300efb3b23SJan Kara if (is_remount) { 15310efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15320efb3b23SJan Kara "Cannot specify journal on remount"); 15330efb3b23SJan Kara return -1; 15340efb3b23SJan Kara } 15350efb3b23SJan Kara *journal_devnum = arg; 1536ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1537ad4eec61SEric Sandeen char *journal_path; 1538ad4eec61SEric Sandeen struct inode *journal_inode; 1539ad4eec61SEric Sandeen struct path path; 1540ad4eec61SEric Sandeen int error; 1541ad4eec61SEric Sandeen 1542ad4eec61SEric Sandeen if (is_remount) { 1543ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1544ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1545ad4eec61SEric Sandeen return -1; 1546ad4eec61SEric Sandeen } 1547ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1548ad4eec61SEric Sandeen if (!journal_path) { 1549ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1550ad4eec61SEric Sandeen "journal device string"); 1551ad4eec61SEric Sandeen return -1; 1552ad4eec61SEric Sandeen } 1553ad4eec61SEric Sandeen 1554ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1555ad4eec61SEric Sandeen if (error) { 1556ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1557ad4eec61SEric Sandeen "journal device path: error %d", error); 1558ad4eec61SEric Sandeen kfree(journal_path); 1559ad4eec61SEric Sandeen return -1; 1560ad4eec61SEric Sandeen } 1561ad4eec61SEric Sandeen 1562ad4eec61SEric Sandeen journal_inode = path.dentry->d_inode; 1563ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1564ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1565ad4eec61SEric Sandeen "is not a block device", journal_path); 1566ad4eec61SEric Sandeen path_put(&path); 1567ad4eec61SEric Sandeen kfree(journal_path); 1568ad4eec61SEric Sandeen return -1; 1569ad4eec61SEric Sandeen } 1570ad4eec61SEric Sandeen 1571ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1572ad4eec61SEric Sandeen path_put(&path); 1573ad4eec61SEric Sandeen kfree(journal_path); 15740efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 15750efb3b23SJan Kara if (arg > 7) { 15765f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 15770efb3b23SJan Kara " (must be 0-7)"); 15780efb3b23SJan Kara return -1; 15790efb3b23SJan Kara } 15800efb3b23SJan Kara *journal_ioprio = 15810efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 158226092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 158326092bf5STheodore Ts'o if (is_remount) { 158426092bf5STheodore Ts'o if (!sbi->s_journal) 158526092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 15865f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 158726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 158826092bf5STheodore Ts'o "Cannot change data mode on remount"); 158926092bf5STheodore Ts'o return -1; 159026092bf5STheodore Ts'o } 159126092bf5STheodore Ts'o } else { 159226092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 159326092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 159426092bf5STheodore Ts'o } 159526092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 159626092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 159726092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 159826092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 15995f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16005f3633e3SJan Kara "quota options when quota turned on"); 160126092bf5STheodore Ts'o return -1; 160226092bf5STheodore Ts'o } 1603262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1604262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1605262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1606262b4662SJan Kara "Cannot set journaled quota options " 1607262b4662SJan Kara "when QUOTA feature is enabled"); 1608262b4662SJan Kara return -1; 1609262b4662SJan Kara } 161026092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 161126092bf5STheodore Ts'o #endif 1612*923ae0ffSRoss Zwisler #ifndef CONFIG_FS_DAX 1613*923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1614*923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1615*923ae0ffSRoss Zwisler return -1; 1616*923ae0ffSRoss Zwisler #endif 161726092bf5STheodore Ts'o } else { 161826092bf5STheodore Ts'o if (!args->from) 161926092bf5STheodore Ts'o arg = 1; 162026092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 162126092bf5STheodore Ts'o arg = !arg; 162226092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 162326092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 162426092bf5STheodore Ts'o "buggy handling of option %s", opt); 162526092bf5STheodore Ts'o WARN_ON(1); 162626092bf5STheodore Ts'o return -1; 162726092bf5STheodore Ts'o } 162826092bf5STheodore Ts'o if (arg != 0) 162926092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 163026092bf5STheodore Ts'o else 163126092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 163226092bf5STheodore Ts'o } 163326092bf5STheodore Ts'o return 1; 163426092bf5STheodore Ts'o } 163526092bf5STheodore Ts'o 1636ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1637c3191067STheodore Ts'o unsigned long *journal_devnum, 1638b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1639661aa520SEric Sandeen int is_remount) 1640ac27a0ecSDave Kleikamp { 1641617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1642ac27a0ecSDave Kleikamp char *p; 1643ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 164426092bf5STheodore Ts'o int token; 1645ac27a0ecSDave Kleikamp 1646ac27a0ecSDave Kleikamp if (!options) 1647ac27a0ecSDave Kleikamp return 1; 1648ac27a0ecSDave Kleikamp 1649ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1650ac27a0ecSDave Kleikamp if (!*p) 1651ac27a0ecSDave Kleikamp continue; 165215121c18SEric Sandeen /* 165315121c18SEric Sandeen * Initialize args struct so we know whether arg was 165415121c18SEric Sandeen * found; some options take optional arguments. 165515121c18SEric Sandeen */ 1656caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1657ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 165826092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 165926092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1660ac27a0ecSDave Kleikamp return 0; 1661ac27a0ecSDave Kleikamp } 1662ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1663262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1664262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1665262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1666262b4662SJan Kara "feature is enabled"); 1667262b4662SJan Kara return 0; 1668262b4662SJan Kara } 1669ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1670482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1671fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1672ac27a0ecSDave Kleikamp 1673482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1674fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1675ac27a0ecSDave Kleikamp 167656c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1677b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1678b31e1552SEric Sandeen "format mixing"); 1679ac27a0ecSDave Kleikamp return 0; 1680ac27a0ecSDave Kleikamp } 1681ac27a0ecSDave Kleikamp 1682ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1683b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1684b31e1552SEric Sandeen "not specified"); 1685ac27a0ecSDave Kleikamp return 0; 1686ac27a0ecSDave Kleikamp } 1687ac27a0ecSDave Kleikamp } 1688ac27a0ecSDave Kleikamp #endif 1689261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1690261cb20cSJan Kara int blocksize = 1691261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1692261cb20cSJan Kara 1693261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1694261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1695261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1696261cb20cSJan Kara return 0; 1697261cb20cSJan Kara } 1698261cb20cSJan Kara } 1699d4f76107SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 1700d4f76107SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 1701d4f76107SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " 1702d4f76107SJan Kara "in data=ordered mode"); 1703d4f76107SJan Kara return 0; 1704d4f76107SJan Kara } 1705ac27a0ecSDave Kleikamp return 1; 1706ac27a0ecSDave Kleikamp } 1707ac27a0ecSDave Kleikamp 17082adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17092adf6da8STheodore Ts'o struct super_block *sb) 17102adf6da8STheodore Ts'o { 17112adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17122adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17132adf6da8STheodore Ts'o 17142adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17152adf6da8STheodore Ts'o char *fmtname = ""; 17162adf6da8STheodore Ts'o 17172adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17182adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17192adf6da8STheodore Ts'o fmtname = "vfsold"; 17202adf6da8STheodore Ts'o break; 17212adf6da8STheodore Ts'o case QFMT_VFS_V0: 17222adf6da8STheodore Ts'o fmtname = "vfsv0"; 17232adf6da8STheodore Ts'o break; 17242adf6da8STheodore Ts'o case QFMT_VFS_V1: 17252adf6da8STheodore Ts'o fmtname = "vfsv1"; 17262adf6da8STheodore Ts'o break; 17272adf6da8STheodore Ts'o } 17282adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17292adf6da8STheodore Ts'o } 17302adf6da8STheodore Ts'o 17312adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17322adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17332adf6da8STheodore Ts'o 17342adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17352adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17362adf6da8STheodore Ts'o #endif 17372adf6da8STheodore Ts'o } 17382adf6da8STheodore Ts'o 17395a916be1STheodore Ts'o static const char *token2str(int token) 17405a916be1STheodore Ts'o { 174150df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17425a916be1STheodore Ts'o 17435a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17445a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17455a916be1STheodore Ts'o break; 17465a916be1STheodore Ts'o return t->pattern; 17475a916be1STheodore Ts'o } 17485a916be1STheodore Ts'o 17492adf6da8STheodore Ts'o /* 17502adf6da8STheodore Ts'o * Show an option if 17512adf6da8STheodore Ts'o * - it's set to a non-default value OR 17522adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17532adf6da8STheodore Ts'o */ 175466acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 175566acdcf4STheodore Ts'o int nodefs) 17562adf6da8STheodore Ts'o { 17572adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17582adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 175966acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17605a916be1STheodore Ts'o const struct mount_opts *m; 176166acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17622adf6da8STheodore Ts'o 176366acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 176466acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17652adf6da8STheodore Ts'o 17662adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17675a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17685a916be1STheodore Ts'o 17695a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17705a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17715a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17725a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17735a916be1STheodore Ts'o continue; 177466acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17755a916be1STheodore Ts'o continue; /* skip if same as the default */ 17765a916be1STheodore Ts'o if ((want_set && 17775a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17785a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17795a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17805a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17815a916be1STheodore Ts'o } 17825a916be1STheodore Ts'o 178308cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17845a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 178508cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 178608cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 178708cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 17885a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 178908cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 179008cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 179166acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 17925a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 17935a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 17942adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 17955a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 17962adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 17975a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 179866acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 17995a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 180066acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18015a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 180266acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18035a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18042adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18055a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 180666acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18075a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 180866acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18092adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18105a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18112adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18125a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18132adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18145a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18155a916be1STheodore Ts'o } 181666acdcf4STheodore Ts'o if (nodefs || 181766acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18185a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18192adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18202adf6da8STheodore Ts'o 182166acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 182266acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18235a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1824df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1825df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18262adf6da8STheodore Ts'o 18272adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18282adf6da8STheodore Ts'o return 0; 18292adf6da8STheodore Ts'o } 18302adf6da8STheodore Ts'o 183166acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 183266acdcf4STheodore Ts'o { 183366acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 183466acdcf4STheodore Ts'o } 183566acdcf4STheodore Ts'o 183666acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 183766acdcf4STheodore Ts'o { 183866acdcf4STheodore Ts'o struct super_block *sb = seq->private; 183966acdcf4STheodore Ts'o int rc; 184066acdcf4STheodore Ts'o 184166acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 184266acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 184366acdcf4STheodore Ts'o seq_puts(seq, "\n"); 184466acdcf4STheodore Ts'o return rc; 184566acdcf4STheodore Ts'o } 184666acdcf4STheodore Ts'o 184766acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 184866acdcf4STheodore Ts'o { 1849d9dda78bSAl Viro return single_open(file, options_seq_show, PDE_DATA(inode)); 185066acdcf4STheodore Ts'o } 185166acdcf4STheodore Ts'o 185266acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 185366acdcf4STheodore Ts'o .owner = THIS_MODULE, 185466acdcf4STheodore Ts'o .open = options_open_fs, 185566acdcf4STheodore Ts'o .read = seq_read, 185666acdcf4STheodore Ts'o .llseek = seq_lseek, 185766acdcf4STheodore Ts'o .release = single_release, 185866acdcf4STheodore Ts'o }; 185966acdcf4STheodore Ts'o 1860617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1861ac27a0ecSDave Kleikamp int read_only) 1862ac27a0ecSDave Kleikamp { 1863617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1864ac27a0ecSDave Kleikamp int res = 0; 1865ac27a0ecSDave Kleikamp 1866617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1867b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1868b31e1552SEric Sandeen "forcing read-only mode"); 1869ac27a0ecSDave Kleikamp res = MS_RDONLY; 1870ac27a0ecSDave Kleikamp } 1871ac27a0ecSDave Kleikamp if (read_only) 1872281b5995STheodore Ts'o goto done; 1873617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1874b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1875b31e1552SEric Sandeen "running e2fsck is recommended"); 1876c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 1877b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1878b31e1552SEric Sandeen "warning: mounting fs with errors, " 1879b31e1552SEric Sandeen "running e2fsck is recommended"); 1880ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1881ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1882ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1883b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1884b31e1552SEric Sandeen "warning: maximal mount count reached, " 1885b31e1552SEric Sandeen "running e2fsck is recommended"); 1886ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1887ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1888ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1889b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1890b31e1552SEric Sandeen "warning: checktime reached, " 1891b31e1552SEric Sandeen "running e2fsck is recommended"); 18920390131bSFrank Mayhar if (!sbi->s_journal) 1893216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1894ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1895617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1896e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1897ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1898617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 18990390131bSFrank Mayhar if (sbi->s_journal) 1900617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1901ac27a0ecSDave Kleikamp 1902e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1903281b5995STheodore Ts'o done: 1904ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1905a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1906a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1907ac27a0ecSDave Kleikamp sb->s_blocksize, 1908ac27a0ecSDave Kleikamp sbi->s_groups_count, 1909617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1910617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1911a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1912ac27a0ecSDave Kleikamp 19137abc52c2SDan Magenheimer cleancache_init_fs(sb); 1914ac27a0ecSDave Kleikamp return res; 1915ac27a0ecSDave Kleikamp } 1916ac27a0ecSDave Kleikamp 1917117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1918117fff10STheodore Ts'o { 1919117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1920117fff10STheodore Ts'o struct flex_groups *new_groups; 1921117fff10STheodore Ts'o int size; 1922117fff10STheodore Ts'o 1923117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1924117fff10STheodore Ts'o return 0; 1925117fff10STheodore Ts'o 1926117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1927117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1928117fff10STheodore Ts'o return 0; 1929117fff10STheodore Ts'o 1930117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1931117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1932117fff10STheodore Ts'o if (!new_groups) { 1933117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1934117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1935117fff10STheodore Ts'o return -ENOMEM; 1936117fff10STheodore Ts'o } 1937117fff10STheodore Ts'o 1938117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1939117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1940117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1941117fff10STheodore Ts'o sizeof(struct flex_groups))); 1942b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 1943117fff10STheodore Ts'o } 1944117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1945117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1946117fff10STheodore Ts'o return 0; 1947117fff10STheodore Ts'o } 1948117fff10STheodore Ts'o 1949772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1950772cb7c8SJose R. Santos { 1951772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1952772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1953772cb7c8SJose R. Santos ext4_group_t flex_group; 1954117fff10STheodore Ts'o int i, err; 1955772cb7c8SJose R. Santos 1956503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1957d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1958772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1959772cb7c8SJose R. Santos return 1; 1960772cb7c8SJose R. Santos } 1961772cb7c8SJose R. Santos 1962117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1963117fff10STheodore Ts'o if (err) 1964772cb7c8SJose R. Santos goto failed; 1965772cb7c8SJose R. Santos 1966772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 196788b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1968772cb7c8SJose R. Santos 1969772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19707ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19717ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 197290ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 197324aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19747ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19757ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1976772cb7c8SJose R. Santos } 1977772cb7c8SJose R. Santos 1978772cb7c8SJose R. Santos return 1; 1979772cb7c8SJose R. Santos failed: 1980772cb7c8SJose R. Santos return 0; 1981772cb7c8SJose R. Santos } 1982772cb7c8SJose R. Santos 1983feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1984717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1985717d50e4SAndreas Dilger { 1986feb0ab32SDarrick J. Wong int offset; 1987717d50e4SAndreas Dilger __u16 crc = 0; 1988717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1989717d50e4SAndreas Dilger 19909aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 1991feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1992d6a77105STheodore Ts'o __le16 save_csum; 1993feb0ab32SDarrick J. Wong __u32 csum32; 1994feb0ab32SDarrick J. Wong 1995d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 1996feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 1997feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 1998feb0ab32SDarrick J. Wong sizeof(le_group)); 1999feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2000feb0ab32SDarrick J. Wong sbi->s_desc_size); 2001d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 2002feb0ab32SDarrick J. Wong 2003feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2004feb0ab32SDarrick J. Wong goto out; 2005feb0ab32SDarrick J. Wong } 2006feb0ab32SDarrick J. Wong 2007feb0ab32SDarrick J. Wong /* old crc16 code */ 2008813d32f9SDarrick J. Wong if (!(sbi->s_es->s_feature_ro_compat & 2009813d32f9SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM))) 2010813d32f9SDarrick J. Wong return 0; 2011813d32f9SDarrick J. Wong 2012feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2013feb0ab32SDarrick J. Wong 2014717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2015717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2016717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2017717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2018717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2019717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2020717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2021717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2022717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2023717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2024717d50e4SAndreas Dilger offset); 2025717d50e4SAndreas Dilger 2026feb0ab32SDarrick J. Wong out: 2027717d50e4SAndreas Dilger return cpu_to_le16(crc); 2028717d50e4SAndreas Dilger } 2029717d50e4SAndreas Dilger 2030feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2031717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2032717d50e4SAndreas Dilger { 2033feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2034feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2035feb0ab32SDarrick J. Wong block_group, gdp))) 2036717d50e4SAndreas Dilger return 0; 2037717d50e4SAndreas Dilger 2038717d50e4SAndreas Dilger return 1; 2039717d50e4SAndreas Dilger } 2040717d50e4SAndreas Dilger 2041feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2042feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2043feb0ab32SDarrick J. Wong { 2044feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2045feb0ab32SDarrick J. Wong return; 2046feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2047feb0ab32SDarrick J. Wong } 2048feb0ab32SDarrick J. Wong 2049ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2050bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2051bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2052ac27a0ecSDave Kleikamp { 2053617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2054617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2055617ba13bSMingming Cao ext4_fsblk_t last_block; 2056bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2057bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2058bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2059ce421581SJose R. Santos int flexbg_flag = 0; 2060bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2061ac27a0ecSDave Kleikamp 2062ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2063ce421581SJose R. Santos flexbg_flag = 1; 2064ce421581SJose R. Santos 2065617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2066ac27a0ecSDave Kleikamp 2067197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2068197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2069197cd65aSAkinobu Mita 2070ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2071bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2072ac27a0ecSDave Kleikamp else 2073ac27a0ecSDave Kleikamp last_block = first_block + 2074617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2075ac27a0ecSDave Kleikamp 2076bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2077bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2078bfff6873SLukas Czerner grp = i; 2079bfff6873SLukas Czerner 20808fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20812b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2082b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2083a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2084b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2085ac27a0ecSDave Kleikamp return 0; 2086ac27a0ecSDave Kleikamp } 20878fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20882b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2089b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2090a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2091b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2092ac27a0ecSDave Kleikamp return 0; 2093ac27a0ecSDave Kleikamp } 20948fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2095bd81d8eeSLaurent Vivier if (inode_table < first_block || 20962b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2097b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2098a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2099b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2100ac27a0ecSDave Kleikamp return 0; 2101ac27a0ecSDave Kleikamp } 2102955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2103feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2104b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2105b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2106fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2107fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21087ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2109955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2110717d50e4SAndreas Dilger return 0; 2111717d50e4SAndreas Dilger } 21127ee1ec4cSLi Zefan } 2113955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2114ce421581SJose R. Santos if (!flexbg_flag) 2115617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2116ac27a0ecSDave Kleikamp } 2117bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2118bfff6873SLukas Czerner *first_not_zeroed = grp; 2119ac27a0ecSDave Kleikamp return 1; 2120ac27a0ecSDave Kleikamp } 2121ac27a0ecSDave Kleikamp 2122617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2123ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2124ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2125ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2126ac27a0ecSDave Kleikamp * 2127ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2128ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2129ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2130ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2131ac27a0ecSDave Kleikamp * 2132ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2133ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2134ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2135617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2136ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2137ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2138ac27a0ecSDave Kleikamp */ 2139617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2140617ba13bSMingming Cao struct ext4_super_block *es) 2141ac27a0ecSDave Kleikamp { 2142ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2143ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2144ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2145ac27a0ecSDave Kleikamp int i; 2146ac27a0ecSDave Kleikamp #endif 2147ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2148ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2149ac27a0ecSDave Kleikamp return; 2150ac27a0ecSDave Kleikamp } 2151ac27a0ecSDave Kleikamp 2152a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2153b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2154b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2155a8f48a95SEric Sandeen return; 2156a8f48a95SEric Sandeen } 2157a8f48a95SEric Sandeen 2158d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2159d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2160d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2161d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2162d39195c3SAmir Goldstein return; 2163d39195c3SAmir Goldstein } 2164d39195c3SAmir Goldstein 2165617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2166c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2167c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 216884474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2169ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2170ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2171c25f9bc6SEric Sandeen } 2172ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2173ac27a0ecSDave Kleikamp return; 2174ac27a0ecSDave Kleikamp } 2175ac27a0ecSDave Kleikamp 2176ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2177b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2178ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2179ac27a0ecSDave Kleikamp } 2180ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2181ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2182ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2183ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2184a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2185617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2186617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2187ac27a0ecSDave Kleikamp if (ret < 0) 2188b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2189b31e1552SEric Sandeen "Cannot turn on journaled " 2190b31e1552SEric Sandeen "quota: error %d", ret); 2191ac27a0ecSDave Kleikamp } 2192ac27a0ecSDave Kleikamp } 2193ac27a0ecSDave Kleikamp #endif 2194ac27a0ecSDave Kleikamp 2195ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2196ac27a0ecSDave Kleikamp struct inode *inode; 2197ac27a0ecSDave Kleikamp 219897bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 219997bd42b9SJosef Bacik if (IS_ERR(inode)) { 2200ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2201ac27a0ecSDave Kleikamp break; 2202ac27a0ecSDave Kleikamp } 2203ac27a0ecSDave Kleikamp 2204617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2205871a2931SChristoph Hellwig dquot_initialize(inode); 2206ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2207566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2208b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2209b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 221046e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2211e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2212ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2213721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 221455f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2215617ba13bSMingming Cao ext4_truncate(inode); 2216721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2217ac27a0ecSDave Kleikamp nr_truncates++; 2218ac27a0ecSDave Kleikamp } else { 2219566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2220b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2221b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 222246e665e9SHarvey Harrison __func__, inode->i_ino); 2223ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2224ac27a0ecSDave Kleikamp inode->i_ino); 2225ac27a0ecSDave Kleikamp nr_orphans++; 2226ac27a0ecSDave Kleikamp } 2227ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2228ac27a0ecSDave Kleikamp } 2229ac27a0ecSDave Kleikamp 2230ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2231ac27a0ecSDave Kleikamp 2232ac27a0ecSDave Kleikamp if (nr_orphans) 2233b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2234b31e1552SEric Sandeen PLURAL(nr_orphans)); 2235ac27a0ecSDave Kleikamp if (nr_truncates) 2236b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2237b31e1552SEric Sandeen PLURAL(nr_truncates)); 2238ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2239ac27a0ecSDave Kleikamp /* Turn quotas off */ 2240a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2241ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2242287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2243ac27a0ecSDave Kleikamp } 2244ac27a0ecSDave Kleikamp #endif 2245ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2246ac27a0ecSDave Kleikamp } 22470b8e58a1SAndreas Dilger 2248cd2291a4SEric Sandeen /* 2249cd2291a4SEric Sandeen * Maximal extent format file size. 2250cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2251cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2252cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2253cd2291a4SEric Sandeen * so that won't be a limiting factor. 2254cd2291a4SEric Sandeen * 2255f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2256f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2257f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2258f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2259f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2260f17722f9SLukas Czerner * 2261cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2262cd2291a4SEric Sandeen */ 2263f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2264cd2291a4SEric Sandeen { 2265cd2291a4SEric Sandeen loff_t res; 2266cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2267cd2291a4SEric Sandeen 2268cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2269f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2270cd2291a4SEric Sandeen /* 227190c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2272cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2273cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2274cd2291a4SEric Sandeen */ 2275cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2276cd2291a4SEric Sandeen 2277cd2291a4SEric Sandeen /* total blocks in file system block size */ 2278cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2279cd2291a4SEric Sandeen upper_limit <<= blkbits; 2280cd2291a4SEric Sandeen } 2281cd2291a4SEric Sandeen 2282f17722f9SLukas Czerner /* 2283f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2284f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2285f17722f9SLukas Czerner * size 2286f17722f9SLukas Czerner */ 2287f17722f9SLukas Czerner res = (1LL << 32) - 1; 2288cd2291a4SEric Sandeen res <<= blkbits; 2289cd2291a4SEric Sandeen 2290cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2291cd2291a4SEric Sandeen if (res > upper_limit) 2292cd2291a4SEric Sandeen res = upper_limit; 2293cd2291a4SEric Sandeen 2294cd2291a4SEric Sandeen return res; 2295cd2291a4SEric Sandeen } 2296ac27a0ecSDave Kleikamp 2297ac27a0ecSDave Kleikamp /* 2298cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22990fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23000fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2301ac27a0ecSDave Kleikamp */ 2302f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2303ac27a0ecSDave Kleikamp { 2304617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23050fc1b451SAneesh Kumar K.V int meta_blocks; 23060fc1b451SAneesh Kumar K.V loff_t upper_limit; 23070b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23080b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23090b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23100b8e58a1SAndreas Dilger * 23110b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23120b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23130fc1b451SAneesh Kumar K.V */ 23140fc1b451SAneesh Kumar K.V 2315f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23160fc1b451SAneesh Kumar K.V /* 231790c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23180b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23190b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23200fc1b451SAneesh Kumar K.V */ 23210fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23220fc1b451SAneesh Kumar K.V 23230fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23240fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23250fc1b451SAneesh Kumar K.V 23260fc1b451SAneesh Kumar K.V } else { 23278180a562SAneesh Kumar K.V /* 23288180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23298180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23308180a562SAneesh Kumar K.V * represent total number of blocks in 23318180a562SAneesh Kumar K.V * file system block size 23328180a562SAneesh Kumar K.V */ 23330fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23340fc1b451SAneesh Kumar K.V 23350fc1b451SAneesh Kumar K.V } 23360fc1b451SAneesh Kumar K.V 23370fc1b451SAneesh Kumar K.V /* indirect blocks */ 23380fc1b451SAneesh Kumar K.V meta_blocks = 1; 23390fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23400fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23410fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23420fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23430fc1b451SAneesh Kumar K.V 23440fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23450fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2346ac27a0ecSDave Kleikamp 2347ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2348ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2349ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2350ac27a0ecSDave Kleikamp res <<= bits; 2351ac27a0ecSDave Kleikamp if (res > upper_limit) 2352ac27a0ecSDave Kleikamp res = upper_limit; 23530fc1b451SAneesh Kumar K.V 23540fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23550fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23560fc1b451SAneesh Kumar K.V 2357ac27a0ecSDave Kleikamp return res; 2358ac27a0ecSDave Kleikamp } 2359ac27a0ecSDave Kleikamp 2360617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 236170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2362ac27a0ecSDave Kleikamp { 2363617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2364fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2365ac27a0ecSDave Kleikamp int has_super = 0; 2366ac27a0ecSDave Kleikamp 2367ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2368ac27a0ecSDave Kleikamp 2369617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2370ac27a0ecSDave Kleikamp nr < first_meta_bg) 237170bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2372ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2373617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2374ac27a0ecSDave Kleikamp has_super = 1; 23750b8e58a1SAndreas Dilger 2376bd63f6b0SDarrick J. Wong /* 2377bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2378bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2379bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2380bd63f6b0SDarrick J. Wong * compensate. 2381bd63f6b0SDarrick J. Wong */ 2382bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2383bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2384bd63f6b0SDarrick J. Wong has_super++; 2385bd63f6b0SDarrick J. Wong 2386617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2387ac27a0ecSDave Kleikamp } 2388ac27a0ecSDave Kleikamp 2389c9de560dSAlex Tomas /** 2390c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2391c9de560dSAlex Tomas * @sbi: In memory super block info 2392c9de560dSAlex Tomas * 2393c9de560dSAlex Tomas * If we have specified it via mount option, then 2394c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2395c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2396c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2397c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2398c9de560dSAlex Tomas * 2399c9de560dSAlex Tomas */ 2400c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2401c9de560dSAlex Tomas { 2402c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2403c9de560dSAlex Tomas unsigned long stripe_width = 2404c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24053eb08658SDan Ehrenberg int ret; 2406c9de560dSAlex Tomas 2407c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24083eb08658SDan Ehrenberg ret = sbi->s_stripe; 24093eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24103eb08658SDan Ehrenberg ret = stripe_width; 24113eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24123eb08658SDan Ehrenberg ret = stride; 24133eb08658SDan Ehrenberg else 24143eb08658SDan Ehrenberg ret = 0; 2415c9de560dSAlex Tomas 24163eb08658SDan Ehrenberg /* 24173eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24183eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24193eb08658SDan Ehrenberg */ 24203eb08658SDan Ehrenberg if (ret <= 1) 24213eb08658SDan Ehrenberg ret = 0; 2422c9de560dSAlex Tomas 24233eb08658SDan Ehrenberg return ret; 2424c9de560dSAlex Tomas } 2425ac27a0ecSDave Kleikamp 24263197ebdbSTheodore Ts'o /* sysfs supprt */ 24273197ebdbSTheodore Ts'o 24283197ebdbSTheodore Ts'o struct ext4_attr { 24293197ebdbSTheodore Ts'o struct attribute attr; 24303197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24313197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24323197ebdbSTheodore Ts'o const char *, size_t); 2433f2d50a65SJan Kara union { 24343197ebdbSTheodore Ts'o int offset; 2435f2d50a65SJan Kara int deprecated_val; 2436f2d50a65SJan Kara } u; 24373197ebdbSTheodore Ts'o }; 24383197ebdbSTheodore Ts'o 243927dd4385SLukas Czerner static int parse_strtoull(const char *buf, 244027dd4385SLukas Czerner unsigned long long max, unsigned long long *value) 244127dd4385SLukas Czerner { 244227dd4385SLukas Czerner int ret; 244327dd4385SLukas Czerner 244427dd4385SLukas Czerner ret = kstrtoull(skip_spaces(buf), 0, value); 244527dd4385SLukas Czerner if (!ret && *value > max) 244627dd4385SLukas Czerner ret = -EINVAL; 244727dd4385SLukas Czerner return ret; 244827dd4385SLukas Czerner } 244927dd4385SLukas Czerner 24503197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24513197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24523197ebdbSTheodore Ts'o char *buf) 24533197ebdbSTheodore Ts'o { 24543197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24557b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24567b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24573197ebdbSTheodore Ts'o } 24583197ebdbSTheodore Ts'o 24593197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24603197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24613197ebdbSTheodore Ts'o { 24623197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24633197ebdbSTheodore Ts'o 2464f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2465f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24663197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24673197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24683197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24693197ebdbSTheodore Ts'o } 24703197ebdbSTheodore Ts'o 24713197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24723197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24733197ebdbSTheodore Ts'o { 24743197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24753197ebdbSTheodore Ts'o 2476f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2477f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24783197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2479a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24803197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2481a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24823197ebdbSTheodore Ts'o } 24833197ebdbSTheodore Ts'o 24843197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24853197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24863197ebdbSTheodore Ts'o const char *buf, size_t count) 24873197ebdbSTheodore Ts'o { 24883197ebdbSTheodore Ts'o unsigned long t; 2489e1091b15SLukas Czerner int ret; 24903197ebdbSTheodore Ts'o 2491e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2492e1091b15SLukas Czerner if (ret) 2493e1091b15SLukas Czerner return ret; 24943197ebdbSTheodore Ts'o 2495e1091b15SLukas Czerner if (t && (!is_power_of_2(t) || t > 0x40000000)) 24963197ebdbSTheodore Ts'o return -EINVAL; 24973197ebdbSTheodore Ts'o 24983197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24993197ebdbSTheodore Ts'o return count; 25003197ebdbSTheodore Ts'o } 25013197ebdbSTheodore Ts'o 25023197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25033197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25043197ebdbSTheodore Ts'o { 2505f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25063197ebdbSTheodore Ts'o 25073197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25083197ebdbSTheodore Ts'o } 25093197ebdbSTheodore Ts'o 25103197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25113197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25123197ebdbSTheodore Ts'o const char *buf, size_t count) 25133197ebdbSTheodore Ts'o { 2514f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25153197ebdbSTheodore Ts'o unsigned long t; 2516e1091b15SLukas Czerner int ret; 25173197ebdbSTheodore Ts'o 2518e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2519e1091b15SLukas Czerner if (ret) 2520e1091b15SLukas Czerner return ret; 25213197ebdbSTheodore Ts'o *ui = t; 25223197ebdbSTheodore Ts'o return count; 25233197ebdbSTheodore Ts'o } 25243197ebdbSTheodore Ts'o 252552c198c6SLukas Czerner static ssize_t es_ui_show(struct ext4_attr *a, 252652c198c6SLukas Czerner struct ext4_sb_info *sbi, char *buf) 252752c198c6SLukas Czerner { 252852c198c6SLukas Czerner 252952c198c6SLukas Czerner unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) + 253052c198c6SLukas Czerner a->u.offset); 253152c198c6SLukas Czerner 253252c198c6SLukas Czerner return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 253352c198c6SLukas Czerner } 253452c198c6SLukas Czerner 253527dd4385SLukas Czerner static ssize_t reserved_clusters_show(struct ext4_attr *a, 253627dd4385SLukas Czerner struct ext4_sb_info *sbi, char *buf) 253727dd4385SLukas Czerner { 253827dd4385SLukas Czerner return snprintf(buf, PAGE_SIZE, "%llu\n", 253927dd4385SLukas Czerner (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); 254027dd4385SLukas Czerner } 254127dd4385SLukas Czerner 254227dd4385SLukas Czerner static ssize_t reserved_clusters_store(struct ext4_attr *a, 254327dd4385SLukas Czerner struct ext4_sb_info *sbi, 254427dd4385SLukas Czerner const char *buf, size_t count) 254527dd4385SLukas Czerner { 254627dd4385SLukas Czerner unsigned long long val; 254727dd4385SLukas Czerner int ret; 254827dd4385SLukas Czerner 254927dd4385SLukas Czerner if (parse_strtoull(buf, -1ULL, &val)) 255027dd4385SLukas Czerner return -EINVAL; 255127dd4385SLukas Czerner ret = ext4_reserve_clusters(sbi, val); 255227dd4385SLukas Czerner 255327dd4385SLukas Czerner return ret ? ret : count; 255427dd4385SLukas Czerner } 255527dd4385SLukas Czerner 25562c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25572c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25582c0544b2STheodore Ts'o const char *buf, size_t count) 25592c0544b2STheodore Ts'o { 25602c0544b2STheodore Ts'o int len = count; 25612c0544b2STheodore Ts'o 25622c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25632c0544b2STheodore Ts'o return -EPERM; 25642c0544b2STheodore Ts'o 25652c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25662c0544b2STheodore Ts'o len--; 25672c0544b2STheodore Ts'o 25682c0544b2STheodore Ts'o if (len) 25692c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25702c0544b2STheodore Ts'o return count; 25712c0544b2STheodore Ts'o } 25722c0544b2STheodore Ts'o 2573f2d50a65SJan Kara static ssize_t sbi_deprecated_show(struct ext4_attr *a, 2574f2d50a65SJan Kara struct ext4_sb_info *sbi, char *buf) 2575f2d50a65SJan Kara { 2576f2d50a65SJan Kara return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); 2577f2d50a65SJan Kara } 2578f2d50a65SJan Kara 25793197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25803197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25813197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25823197ebdbSTheodore Ts'o .show = _show, \ 25833197ebdbSTheodore Ts'o .store = _store, \ 2584f2d50a65SJan Kara .u = { \ 25853197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname),\ 2586f2d50a65SJan Kara }, \ 25873197ebdbSTheodore Ts'o } 258852c198c6SLukas Czerner 258952c198c6SLukas Czerner #define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \ 259052c198c6SLukas Czerner static struct ext4_attr ext4_attr_##_name = { \ 259152c198c6SLukas Czerner .attr = {.name = __stringify(_name), .mode = _mode }, \ 259252c198c6SLukas Czerner .show = _show, \ 259352c198c6SLukas Czerner .store = _store, \ 259452c198c6SLukas Czerner .u = { \ 259552c198c6SLukas Czerner .offset = offsetof(struct ext4_super_block, _elname), \ 259652c198c6SLukas Czerner }, \ 259752c198c6SLukas Czerner } 259852c198c6SLukas Czerner 25993197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 26003197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 26013197ebdbSTheodore Ts'o 2602857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 26033197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 26043197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 260552c198c6SLukas Czerner 260652c198c6SLukas Czerner #define EXT4_RO_ATTR_ES_UI(name, elname) \ 260752c198c6SLukas Czerner EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname) 26083197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 26093197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 261052c198c6SLukas Czerner 26113197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 2612f2d50a65SJan Kara #define EXT4_DEPRECATED_ATTR(_name, _val) \ 2613f2d50a65SJan Kara static struct ext4_attr ext4_attr_##_name = { \ 2614f2d50a65SJan Kara .attr = {.name = __stringify(_name), .mode = 0444 }, \ 2615f2d50a65SJan Kara .show = sbi_deprecated_show, \ 2616f2d50a65SJan Kara .u = { \ 2617f2d50a65SJan Kara .deprecated_val = _val, \ 2618f2d50a65SJan Kara }, \ 2619f2d50a65SJan Kara } 26203197ebdbSTheodore Ts'o 26213197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 26223197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 26233197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 262427dd4385SLukas Czerner EXT4_RW_ATTR(reserved_clusters); 26253197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 26263197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 262711013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 26283197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 26293197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 26303197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 26313197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26323197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26333197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 2634f2d50a65SJan Kara EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); 263567a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 26362c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 2637efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 2638efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 2639efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 2640efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 2641efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 2642efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 264352c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 264452c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); 264552c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); 26463197ebdbSTheodore Ts'o 26473197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26483197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26493197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26503197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 265127dd4385SLukas Czerner ATTR_LIST(reserved_clusters), 26523197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 265311013911SAndreas Dilger ATTR_LIST(inode_goal), 26543197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26553197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26563197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26573197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26583197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26593197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 266055138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 266167a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 26622c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 2663efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 2664efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_burst), 2665efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 2666efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 2667efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 2668efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 266952c198c6SLukas Czerner ATTR_LIST(errors_count), 267052c198c6SLukas Czerner ATTR_LIST(first_error_time), 267152c198c6SLukas Czerner ATTR_LIST(last_error_time), 26723197ebdbSTheodore Ts'o NULL, 26733197ebdbSTheodore Ts'o }; 26743197ebdbSTheodore Ts'o 2675857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2676857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 267727ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 26785e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2679857ac889SLukas Czerner 2680857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2681857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 268227ee40dfSLukas Czerner ATTR_LIST(batched_discard), 26835e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2684857ac889SLukas Czerner NULL, 2685857ac889SLukas Czerner }; 2686857ac889SLukas Czerner 26873197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 26883197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 26893197ebdbSTheodore Ts'o { 26903197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26913197ebdbSTheodore Ts'o s_kobj); 26923197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26933197ebdbSTheodore Ts'o 26943197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 26953197ebdbSTheodore Ts'o } 26963197ebdbSTheodore Ts'o 26973197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 26983197ebdbSTheodore Ts'o struct attribute *attr, 26993197ebdbSTheodore Ts'o const char *buf, size_t len) 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 struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27043197ebdbSTheodore Ts'o 27053197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 27063197ebdbSTheodore Ts'o } 27073197ebdbSTheodore Ts'o 27083197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 27093197ebdbSTheodore Ts'o { 27103197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27113197ebdbSTheodore Ts'o s_kobj); 27123197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 27133197ebdbSTheodore Ts'o } 27143197ebdbSTheodore Ts'o 271552cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 27163197ebdbSTheodore Ts'o .show = ext4_attr_show, 27173197ebdbSTheodore Ts'o .store = ext4_attr_store, 27183197ebdbSTheodore Ts'o }; 27193197ebdbSTheodore Ts'o 27203197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 27213197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 27223197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 27233197ebdbSTheodore Ts'o .release = ext4_sb_release, 27243197ebdbSTheodore Ts'o }; 27253197ebdbSTheodore Ts'o 2726857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2727857ac889SLukas Czerner { 2728857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2729857ac889SLukas Czerner } 2730857ac889SLukas Czerner 2731c7f72543SLukas Czerner static ssize_t ext4_feat_show(struct kobject *kobj, 2732c7f72543SLukas Czerner struct attribute *attr, char *buf) 2733c7f72543SLukas Czerner { 2734c7f72543SLukas Czerner return snprintf(buf, PAGE_SIZE, "supported\n"); 2735c7f72543SLukas Czerner } 2736c7f72543SLukas Czerner 2737c7f72543SLukas Czerner /* 2738c7f72543SLukas Czerner * We can not use ext4_attr_show/store because it relies on the kobject 2739c7f72543SLukas Czerner * being embedded in the ext4_sb_info structure which is definitely not 2740c7f72543SLukas Czerner * true in this case. 2741c7f72543SLukas Czerner */ 2742c7f72543SLukas Czerner static const struct sysfs_ops ext4_feat_ops = { 2743c7f72543SLukas Czerner .show = ext4_feat_show, 2744c7f72543SLukas Czerner .store = NULL, 2745c7f72543SLukas Czerner }; 2746c7f72543SLukas Czerner 2747857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2748857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2749c7f72543SLukas Czerner .sysfs_ops = &ext4_feat_ops, 2750857ac889SLukas Czerner .release = ext4_feat_release, 2751857ac889SLukas Czerner }; 2752857ac889SLukas Czerner 2753a13fb1a4SEric Sandeen /* 2754a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2755a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2756a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2757a13fb1a4SEric Sandeen * 0 if it cannot be. 2758a13fb1a4SEric Sandeen */ 2759a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2760a13fb1a4SEric Sandeen { 2761a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2762a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2763a13fb1a4SEric Sandeen "Couldn't mount because of " 2764a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2765a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2766a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2767a13fb1a4SEric Sandeen return 0; 2768a13fb1a4SEric Sandeen } 2769a13fb1a4SEric Sandeen 2770a13fb1a4SEric Sandeen if (readonly) 2771a13fb1a4SEric Sandeen return 1; 2772a13fb1a4SEric Sandeen 2773a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2774a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2775a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2776a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2777a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2778a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2779a13fb1a4SEric Sandeen return 0; 2780a13fb1a4SEric Sandeen } 2781a13fb1a4SEric Sandeen /* 2782a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2783a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2784a13fb1a4SEric Sandeen */ 2785a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2786a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2787a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2788a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2789a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2790a13fb1a4SEric Sandeen return 0; 2791a13fb1a4SEric Sandeen } 2792a13fb1a4SEric Sandeen } 2793bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2794bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2795bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2796bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2797bab08ab9STheodore Ts'o "extents feature\n"); 2798bab08ab9STheodore Ts'o return 0; 2799bab08ab9STheodore Ts'o } 28007c319d32SAditya Kali 28017c319d32SAditya Kali #ifndef CONFIG_QUOTA 28027c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 28037c319d32SAditya Kali !readonly) { 28047c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28057c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28067c319d32SAditya Kali "without CONFIG_QUOTA"); 28077c319d32SAditya Kali return 0; 28087c319d32SAditya Kali } 28097c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2810a13fb1a4SEric Sandeen return 1; 2811a13fb1a4SEric Sandeen } 2812a13fb1a4SEric Sandeen 281366e61a9eSTheodore Ts'o /* 281466e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 281566e61a9eSTheodore Ts'o * on the file system 281666e61a9eSTheodore Ts'o */ 281766e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 281866e61a9eSTheodore Ts'o { 281966e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 282066e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 282166e61a9eSTheodore Ts'o struct ext4_super_block *es; 282266e61a9eSTheodore Ts'o 282366e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 282466e61a9eSTheodore Ts'o es = sbi->s_es; 282566e61a9eSTheodore Ts'o 282666e61a9eSTheodore Ts'o if (es->s_error_count) 2827ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2828ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 282966e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 283066e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2831ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 283266e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 283366e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 283466e61a9eSTheodore Ts'o es->s_first_error_func, 283566e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 283666e61a9eSTheodore Ts'o if (es->s_first_error_ino) 283766e61a9eSTheodore Ts'o printk(": inode %u", 283866e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 283966e61a9eSTheodore Ts'o if (es->s_first_error_block) 284066e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 284166e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 284266e61a9eSTheodore Ts'o printk("\n"); 284366e61a9eSTheodore Ts'o } 284466e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2845ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 284666e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 284766e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 284866e61a9eSTheodore Ts'o es->s_last_error_func, 284966e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 285066e61a9eSTheodore Ts'o if (es->s_last_error_ino) 285166e61a9eSTheodore Ts'o printk(": inode %u", 285266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 285366e61a9eSTheodore Ts'o if (es->s_last_error_block) 285466e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 285566e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 285666e61a9eSTheodore Ts'o printk("\n"); 285766e61a9eSTheodore Ts'o } 285866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 285966e61a9eSTheodore Ts'o } 286066e61a9eSTheodore Ts'o 2861bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2862bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2863bfff6873SLukas Czerner { 2864bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2865bfff6873SLukas Czerner ext4_group_t group, ngroups; 2866bfff6873SLukas Czerner struct super_block *sb; 2867bfff6873SLukas Czerner unsigned long timeout = 0; 2868bfff6873SLukas Czerner int ret = 0; 2869bfff6873SLukas Czerner 2870bfff6873SLukas Czerner sb = elr->lr_super; 2871bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2872bfff6873SLukas Czerner 28738e8ad8a5SJan Kara sb_start_write(sb); 2874bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2875bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2876bfff6873SLukas Czerner if (!gdp) { 2877bfff6873SLukas Czerner ret = 1; 2878bfff6873SLukas Czerner break; 2879bfff6873SLukas Czerner } 2880bfff6873SLukas Czerner 2881bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2882bfff6873SLukas Czerner break; 2883bfff6873SLukas Czerner } 2884bfff6873SLukas Czerner 28857f511862STheodore Ts'o if (group >= ngroups) 2886bfff6873SLukas Czerner ret = 1; 2887bfff6873SLukas Czerner 2888bfff6873SLukas Czerner if (!ret) { 2889bfff6873SLukas Czerner timeout = jiffies; 2890bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2891bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2892bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 289351ce6511SLukas Czerner timeout = (jiffies - timeout) * 289451ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2895bfff6873SLukas Czerner elr->lr_timeout = timeout; 2896bfff6873SLukas Czerner } 2897bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2898bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2899bfff6873SLukas Czerner } 29008e8ad8a5SJan Kara sb_end_write(sb); 2901bfff6873SLukas Czerner 2902bfff6873SLukas Czerner return ret; 2903bfff6873SLukas Czerner } 2904bfff6873SLukas Czerner 2905bfff6873SLukas Czerner /* 2906bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29074ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2908bfff6873SLukas Czerner */ 2909bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2910bfff6873SLukas Czerner { 2911bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2912bfff6873SLukas Czerner 2913bfff6873SLukas Czerner if (!elr) 2914bfff6873SLukas Czerner return; 2915bfff6873SLukas Czerner 2916bfff6873SLukas Czerner sbi = elr->lr_sbi; 2917bfff6873SLukas Czerner 2918bfff6873SLukas Czerner list_del(&elr->lr_request); 2919bfff6873SLukas Czerner sbi->s_li_request = NULL; 2920bfff6873SLukas Czerner kfree(elr); 2921bfff6873SLukas Czerner } 2922bfff6873SLukas Czerner 2923bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2924bfff6873SLukas Czerner { 29251bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29261bb933fbSLukas Czerner if (!ext4_li_info) { 29271bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2928bfff6873SLukas Czerner return; 29291bb933fbSLukas Czerner } 2930bfff6873SLukas Czerner 2931bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29321bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2933bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29341bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2935bfff6873SLukas Czerner } 2936bfff6873SLukas Czerner 29378f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29388f1f7453SEric Sandeen 2939bfff6873SLukas Czerner /* 2940bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2941bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2942bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2943bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2944bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2945bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2946bfff6873SLukas Czerner * next waking time and put itself into sleep. 2947bfff6873SLukas Czerner */ 2948bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2949bfff6873SLukas Czerner { 2950bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2951bfff6873SLukas Czerner struct list_head *pos, *n; 2952bfff6873SLukas Czerner struct ext4_li_request *elr; 29534ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2954bfff6873SLukas Czerner 2955bfff6873SLukas Czerner BUG_ON(NULL == eli); 2956bfff6873SLukas Czerner 2957bfff6873SLukas Czerner cont_thread: 2958bfff6873SLukas Czerner while (true) { 2959bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2960bfff6873SLukas Czerner 2961bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2962bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2963bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2964bfff6873SLukas Czerner goto exit_thread; 2965bfff6873SLukas Czerner } 2966bfff6873SLukas Czerner 2967bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2968bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2969bfff6873SLukas Czerner lr_request); 2970bfff6873SLukas Czerner 2971b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2972b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2973b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2974bfff6873SLukas Czerner ext4_remove_li_request(elr); 2975bfff6873SLukas Czerner continue; 2976bfff6873SLukas Czerner } 2977b2c78cd0STheodore Ts'o } 2978bfff6873SLukas Czerner 2979bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2980bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2981bfff6873SLukas Czerner } 2982bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2983bfff6873SLukas Czerner 2984a0acae0eSTejun Heo try_to_freeze(); 2985bfff6873SLukas Czerner 29864ed5c033SLukas Czerner cur = jiffies; 29874ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2988f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2989bfff6873SLukas Czerner cond_resched(); 2990bfff6873SLukas Czerner continue; 2991bfff6873SLukas Czerner } 2992bfff6873SLukas Czerner 29934ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 29944ed5c033SLukas Czerner 29958f1f7453SEric Sandeen if (kthread_should_stop()) { 29968f1f7453SEric Sandeen ext4_clear_request_list(); 29978f1f7453SEric Sandeen goto exit_thread; 29988f1f7453SEric Sandeen } 2999bfff6873SLukas Czerner } 3000bfff6873SLukas Czerner 3001bfff6873SLukas Czerner exit_thread: 3002bfff6873SLukas Czerner /* 3003bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3004bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3005bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3006bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3007bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3008bfff6873SLukas Czerner * new one. 3009bfff6873SLukas Czerner */ 3010bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3011bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3012bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3013bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3014bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3015bfff6873SLukas Czerner goto cont_thread; 3016bfff6873SLukas Czerner } 3017bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3018bfff6873SLukas Czerner kfree(ext4_li_info); 3019bfff6873SLukas Czerner ext4_li_info = NULL; 3020bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3021bfff6873SLukas Czerner 3022bfff6873SLukas Czerner return 0; 3023bfff6873SLukas Czerner } 3024bfff6873SLukas Czerner 3025bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3026bfff6873SLukas Czerner { 3027bfff6873SLukas Czerner struct list_head *pos, *n; 3028bfff6873SLukas Czerner struct ext4_li_request *elr; 3029bfff6873SLukas Czerner 3030bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3031bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3032bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3033bfff6873SLukas Czerner lr_request); 3034bfff6873SLukas Czerner ext4_remove_li_request(elr); 3035bfff6873SLukas Czerner } 3036bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3037bfff6873SLukas Czerner } 3038bfff6873SLukas Czerner 3039bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3040bfff6873SLukas Czerner { 30418f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30428f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30438f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30448f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3045bfff6873SLukas Czerner ext4_clear_request_list(); 3046bfff6873SLukas Czerner kfree(ext4_li_info); 3047bfff6873SLukas Czerner ext4_li_info = NULL; 304892b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3049bfff6873SLukas Czerner "initialization thread\n", 3050bfff6873SLukas Czerner err); 3051bfff6873SLukas Czerner return err; 3052bfff6873SLukas Czerner } 3053bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3054bfff6873SLukas Czerner return 0; 3055bfff6873SLukas Czerner } 3056bfff6873SLukas Czerner 3057bfff6873SLukas Czerner /* 3058bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3059bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3060bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3061bfff6873SLukas Czerner * groups and return total number of groups. 3062bfff6873SLukas Czerner */ 3063bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3064bfff6873SLukas Czerner { 3065bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3066bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3067bfff6873SLukas Czerner 3068bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3069bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3070bfff6873SLukas Czerner if (!gdp) 3071bfff6873SLukas Czerner continue; 3072bfff6873SLukas Czerner 3073bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3074bfff6873SLukas Czerner break; 3075bfff6873SLukas Czerner } 3076bfff6873SLukas Czerner 3077bfff6873SLukas Czerner return group; 3078bfff6873SLukas Czerner } 3079bfff6873SLukas Czerner 3080bfff6873SLukas Czerner static int ext4_li_info_new(void) 3081bfff6873SLukas Czerner { 3082bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3083bfff6873SLukas Czerner 3084bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3085bfff6873SLukas Czerner if (!eli) 3086bfff6873SLukas Czerner return -ENOMEM; 3087bfff6873SLukas Czerner 3088bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3089bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3090bfff6873SLukas Czerner 3091bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3092bfff6873SLukas Czerner 3093bfff6873SLukas Czerner ext4_li_info = eli; 3094bfff6873SLukas Czerner 3095bfff6873SLukas Czerner return 0; 3096bfff6873SLukas Czerner } 3097bfff6873SLukas Czerner 3098bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3099bfff6873SLukas Czerner ext4_group_t start) 3100bfff6873SLukas Czerner { 3101bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3102bfff6873SLukas Czerner struct ext4_li_request *elr; 3103bfff6873SLukas Czerner 3104bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3105bfff6873SLukas Czerner if (!elr) 3106bfff6873SLukas Czerner return NULL; 3107bfff6873SLukas Czerner 3108bfff6873SLukas Czerner elr->lr_super = sb; 3109bfff6873SLukas Czerner elr->lr_sbi = sbi; 3110bfff6873SLukas Czerner elr->lr_next_group = start; 3111bfff6873SLukas Czerner 3112bfff6873SLukas Czerner /* 3113bfff6873SLukas Czerner * Randomize first schedule time of the request to 3114bfff6873SLukas Czerner * spread the inode table initialization requests 3115bfff6873SLukas Czerner * better. 3116bfff6873SLukas Czerner */ 3117dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3118dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3119bfff6873SLukas Czerner return elr; 3120bfff6873SLukas Czerner } 3121bfff6873SLukas Czerner 31227f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3123bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3124bfff6873SLukas Czerner { 3125bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31267f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3127bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 31286c5a6cb9SAndrew Morton int ret = 0; 3129bfff6873SLukas Czerner 31307f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 313151ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 313251ce6511SLukas Czerner /* 313351ce6511SLukas Czerner * Reset timeout so it can be computed again, because 313451ce6511SLukas Czerner * s_li_wait_mult might have changed. 313551ce6511SLukas Czerner */ 313651ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31377f511862STheodore Ts'o goto out; 313851ce6511SLukas Czerner } 3139bfff6873SLukas Czerner 3140bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3141bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 314255ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31437f511862STheodore Ts'o goto out; 3144bfff6873SLukas Czerner 3145bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31467f511862STheodore Ts'o if (!elr) { 31477f511862STheodore Ts'o ret = -ENOMEM; 31487f511862STheodore Ts'o goto out; 31497f511862STheodore Ts'o } 3150bfff6873SLukas Czerner 3151bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3152bfff6873SLukas Czerner ret = ext4_li_info_new(); 3153bfff6873SLukas Czerner if (ret) 3154bfff6873SLukas Czerner goto out; 3155bfff6873SLukas Czerner } 3156bfff6873SLukas Czerner 3157bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3158bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3159bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3160bfff6873SLukas Czerner 3161bfff6873SLukas Czerner sbi->s_li_request = elr; 316246e4690bSTao Ma /* 316346e4690bSTao Ma * set elr to NULL here since it has been inserted to 316446e4690bSTao Ma * the request_list and the removal and free of it is 316546e4690bSTao Ma * handled by ext4_clear_request_list from now on. 316646e4690bSTao Ma */ 316746e4690bSTao Ma elr = NULL; 3168bfff6873SLukas Czerner 3169bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3170bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3171bfff6873SLukas Czerner if (ret) 3172bfff6873SLukas Czerner goto out; 3173bfff6873SLukas Czerner } 3174bfff6873SLukas Czerner out: 3175bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3176beed5ecbSNicolas Kaiser if (ret) 3177bfff6873SLukas Czerner kfree(elr); 3178bfff6873SLukas Czerner return ret; 3179bfff6873SLukas Czerner } 3180bfff6873SLukas Czerner 3181bfff6873SLukas Czerner /* 3182bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3183bfff6873SLukas Czerner * module unload. 3184bfff6873SLukas Czerner */ 3185bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3186bfff6873SLukas Czerner { 3187bfff6873SLukas Czerner /* 3188bfff6873SLukas Czerner * If thread exited earlier 3189bfff6873SLukas Czerner * there's nothing to be done. 3190bfff6873SLukas Czerner */ 31918f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3192bfff6873SLukas Czerner return; 3193bfff6873SLukas Czerner 31948f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3195bfff6873SLukas Czerner } 3196bfff6873SLukas Czerner 319725ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 319825ed6e8aSDarrick J. Wong { 319925ed6e8aSDarrick J. Wong int ret = 1; 320025ed6e8aSDarrick J. Wong int compat, incompat; 320125ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 320225ed6e8aSDarrick J. Wong 32039aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3204db9ee220SDarrick J. Wong /* journal checksum v3 */ 320525ed6e8aSDarrick J. Wong compat = 0; 3206db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 320725ed6e8aSDarrick J. Wong } else { 320825ed6e8aSDarrick J. Wong /* journal checksum v1 */ 320925ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 321025ed6e8aSDarrick J. Wong incompat = 0; 321125ed6e8aSDarrick J. Wong } 321225ed6e8aSDarrick J. Wong 3213feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3214feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3215feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3216feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 321725ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 321825ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 321925ed6e8aSDarrick J. Wong compat, 0, 322025ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 322125ed6e8aSDarrick J. Wong incompat); 322225ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 322325ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 322425ed6e8aSDarrick J. Wong compat, 0, 322525ed6e8aSDarrick J. Wong incompat); 322625ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 322725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 322825ed6e8aSDarrick J. Wong } else { 3229feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3230feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 323125ed6e8aSDarrick J. Wong } 323225ed6e8aSDarrick J. Wong 323325ed6e8aSDarrick J. Wong return ret; 323425ed6e8aSDarrick J. Wong } 323525ed6e8aSDarrick J. Wong 3236952fc18eSTheodore Ts'o /* 3237952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3238952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3239952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3240952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3241952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3242952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3243952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3244952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3245952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3246952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3247952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3248952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3249952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3250952fc18eSTheodore Ts'o */ 3251952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3252952fc18eSTheodore Ts'o char *buf) 3253952fc18eSTheodore Ts'o { 3254952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3255952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3256952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3257952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3258952fc18eSTheodore Ts'o int s, j, count = 0; 3259952fc18eSTheodore Ts'o 32600548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 32610548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32620548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32630548bbb8STheodore Ts'o 3264952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3265952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3266952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3267952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3268952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3269952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3270952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3271952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3272952fc18eSTheodore Ts'o count++; 3273952fc18eSTheodore Ts'o } 3274952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3275952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3276952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3277952fc18eSTheodore Ts'o count++; 3278952fc18eSTheodore Ts'o } 3279952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3280952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3281952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3282952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3283952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3284952fc18eSTheodore Ts'o count++; 3285952fc18eSTheodore Ts'o } 3286952fc18eSTheodore Ts'o if (i != grp) 3287952fc18eSTheodore Ts'o continue; 3288952fc18eSTheodore Ts'o s = 0; 3289952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3290952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3291952fc18eSTheodore Ts'o count++; 3292952fc18eSTheodore Ts'o } 3293952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3294952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3295952fc18eSTheodore Ts'o count++; 3296952fc18eSTheodore Ts'o } 3297952fc18eSTheodore Ts'o } 3298952fc18eSTheodore Ts'o if (!count) 3299952fc18eSTheodore Ts'o return 0; 3300952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3301952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3302952fc18eSTheodore Ts'o } 3303952fc18eSTheodore Ts'o 3304952fc18eSTheodore Ts'o /* 3305952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3306952fc18eSTheodore Ts'o */ 3307952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3308952fc18eSTheodore Ts'o { 3309952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3310952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3311952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3312952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 33134fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3314952fc18eSTheodore Ts'o 3315952fc18eSTheodore Ts'o if (!buf) 3316952fc18eSTheodore Ts'o return -ENOMEM; 3317952fc18eSTheodore Ts'o 3318952fc18eSTheodore Ts'o /* 3319952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3320952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3321952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3322952fc18eSTheodore Ts'o */ 3323952fc18eSTheodore Ts'o 3324952fc18eSTheodore Ts'o /* 3325952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3326952fc18eSTheodore Ts'o */ 3327952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3328952fc18eSTheodore Ts'o 3329952fc18eSTheodore Ts'o /* 3330952fc18eSTheodore Ts'o * Add the overhead found in each block group 3331952fc18eSTheodore Ts'o */ 3332952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3333952fc18eSTheodore Ts'o int blks; 3334952fc18eSTheodore Ts'o 3335952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3336952fc18eSTheodore Ts'o overhead += blks; 3337952fc18eSTheodore Ts'o if (blks) 3338952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3339952fc18eSTheodore Ts'o cond_resched(); 3340952fc18eSTheodore Ts'o } 3341b003b524SEric Sandeen /* Add the internal journal blocks as well */ 3342b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3343810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33440875a2b4SEric Sandeen 3345952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3346952fc18eSTheodore Ts'o smp_wmb(); 3347952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3348952fc18eSTheodore Ts'o return 0; 3349952fc18eSTheodore Ts'o } 3350952fc18eSTheodore Ts'o 335127dd4385SLukas Czerner 335230fac0f7SJan Kara static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) 335327dd4385SLukas Czerner { 335427dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 335527dd4385SLukas Czerner 335627dd4385SLukas Czerner /* 335730fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 335830fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 335930fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 336030fac0f7SJan Kara * to keep ext2/3 backward compatibility. 336130fac0f7SJan Kara */ 336230fac0f7SJan Kara if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 336330fac0f7SJan Kara return 0; 336430fac0f7SJan Kara /* 336527dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 336627dd4385SLukas Czerner * This should cover the situations where we can not afford to run 336727dd4385SLukas Czerner * out of space like for example punch hole, or converting 3368556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 336927dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 337027dd4385SLukas Czerner * very rare. 337127dd4385SLukas Czerner */ 337230fac0f7SJan Kara resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> 337330fac0f7SJan Kara EXT4_SB(sb)->s_cluster_bits; 337427dd4385SLukas Czerner 337527dd4385SLukas Czerner do_div(resv_clusters, 50); 337627dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 337727dd4385SLukas Czerner 337827dd4385SLukas Czerner return resv_clusters; 337927dd4385SLukas Czerner } 338027dd4385SLukas Czerner 338127dd4385SLukas Czerner 338227dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) 338327dd4385SLukas Czerner { 338427dd4385SLukas Czerner ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> 338527dd4385SLukas Czerner sbi->s_cluster_bits; 338627dd4385SLukas Czerner 338727dd4385SLukas Czerner if (count >= clusters) 338827dd4385SLukas Czerner return -EINVAL; 338927dd4385SLukas Czerner 339027dd4385SLukas Czerner atomic64_set(&sbi->s_resv_clusters, count); 339127dd4385SLukas Czerner return 0; 339227dd4385SLukas Czerner } 339327dd4385SLukas Czerner 3394617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3395ac27a0ecSDave Kleikamp { 3396d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3397ac27a0ecSDave Kleikamp struct buffer_head *bh; 3398617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3399617ba13bSMingming Cao struct ext4_sb_info *sbi; 3400617ba13bSMingming Cao ext4_fsblk_t block; 3401617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 340270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3403ac27a0ecSDave Kleikamp unsigned long offset = 0; 3404ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3405ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3406ac27a0ecSDave Kleikamp struct inode *root; 34079f6200bbSTheodore Ts'o char *cp; 34080390131bSFrank Mayhar const char *descr; 3409dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3410281b5995STheodore Ts'o int blocksize, clustersize; 34114ec11028STheodore Ts'o unsigned int db_count; 34124ec11028STheodore Ts'o unsigned int i; 3413281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3414bd81d8eeSLaurent Vivier __u64 blocks_count; 341507aa2ea1SLukas Czerner int err = 0; 3416b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3417bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3418ac27a0ecSDave Kleikamp 3419ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3420ac27a0ecSDave Kleikamp if (!sbi) 3421dcc7dae3SCyrill Gorcunov goto out_free_orig; 3422705895b6SPekka Enberg 3423705895b6SPekka Enberg sbi->s_blockgroup_lock = 3424705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3425705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3426705895b6SPekka Enberg kfree(sbi); 3427dcc7dae3SCyrill Gorcunov goto out_free_orig; 3428705895b6SPekka Enberg } 3429ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34302c0544b2STheodore Ts'o sbi->s_sb = sb; 3431240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3432d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3433f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3434f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3435f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3436ac27a0ecSDave Kleikamp 34379f6200bbSTheodore Ts'o /* Cleanup superblock name */ 34389f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 34399f6200bbSTheodore Ts'o *cp = '!'; 34409f6200bbSTheodore Ts'o 344107aa2ea1SLukas Czerner /* -EINVAL is default */ 3442dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3443617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3444ac27a0ecSDave Kleikamp if (!blocksize) { 3445b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3446ac27a0ecSDave Kleikamp goto out_fail; 3447ac27a0ecSDave Kleikamp } 3448ac27a0ecSDave Kleikamp 3449ac27a0ecSDave Kleikamp /* 3450617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3451ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3452ac27a0ecSDave Kleikamp */ 3453617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 345470bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 345570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3456ac27a0ecSDave Kleikamp } else { 345770bbb3e0SAndrew Morton logical_sb_block = sb_block; 3458ac27a0ecSDave Kleikamp } 3459ac27a0ecSDave Kleikamp 3460a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3461b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3462ac27a0ecSDave Kleikamp goto out_fail; 3463ac27a0ecSDave Kleikamp } 3464ac27a0ecSDave Kleikamp /* 3465ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3466617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3467ac27a0ecSDave Kleikamp */ 34682716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3469ac27a0ecSDave Kleikamp sbi->s_es = es; 3470ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3471617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3472617ba13bSMingming Cao goto cantfind_ext4; 3473afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3474ac27a0ecSDave Kleikamp 3475feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3476feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3477feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3478feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3479363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3480feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3481feb0ab32SDarrick J. Wong 3482d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3483d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3484d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3485d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3486d25425f8SDarrick J. Wong silent = 1; 3487d25425f8SDarrick J. Wong goto cantfind_ext4; 3488d25425f8SDarrick J. Wong } 3489d25425f8SDarrick J. Wong 34900441984aSDarrick J. Wong /* Load the checksum driver */ 34910441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 34920441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 34930441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 34940441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 34950441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 34960441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 34970441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 34980441984aSDarrick J. Wong goto failed_mount; 34990441984aSDarrick J. Wong } 35000441984aSDarrick J. Wong } 35010441984aSDarrick J. Wong 3502a9c47317SDarrick J. Wong /* Check superblock checksum */ 3503a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3504a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3505a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3506a9c47317SDarrick J. Wong silent = 1; 3507a9c47317SDarrick J. Wong goto cantfind_ext4; 3508a9c47317SDarrick J. Wong } 3509a9c47317SDarrick J. Wong 3510a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 35119aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) 3512a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3513a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3514a9c47317SDarrick J. Wong 3515ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3516ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3517fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3518617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3519fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 352087f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3521fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3522617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3523fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3524ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3525fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 352603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3527fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35282e7842b8SHugh Dickins #endif 352998c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 353098c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 353198c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 353298c1a759SDarrick J. Wong 3533617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3534fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3535617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3536fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3537617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3538fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3539ac27a0ecSDave Kleikamp 3540617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3541fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3542bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3543fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3544bb4f397aSAneesh Kumar K.V else 3545fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 354645f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3547fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35488b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3549fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3550ac27a0ecSDave Kleikamp 355108cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 355208cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 355330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 355430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 355530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3556ac27a0ecSDave Kleikamp 35578b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3558fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3559ac27a0ecSDave Kleikamp 35601e2462f9SMingming Cao /* 3561dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3562dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3563dd919b98SAneesh Kumar K.V */ 3564bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35658b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3566fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3567dd919b98SAneesh Kumar K.V 356851ce6511SLukas Czerner /* 356951ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 357051ce6511SLukas Czerner * no mount option specified. 357151ce6511SLukas Czerner */ 357251ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 357351ce6511SLukas Czerner 35748b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3575661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 35768b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35778b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35788b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 35798b67f04aSTheodore Ts'o } 35805a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3581b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3582661aa520SEric Sandeen &journal_ioprio, 0)) 3583ac27a0ecSDave Kleikamp goto failed_mount; 3584ac27a0ecSDave Kleikamp 358556889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 358656889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 358756889787STheodore Ts'o "with data=journal disables delayed " 358856889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 358956889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 359056889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 359156889787STheodore Ts'o "both data=journal and delalloc"); 359256889787STheodore Ts'o goto failed_mount; 359356889787STheodore Ts'o } 359456889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 359556889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 35966ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 359756889787STheodore Ts'o goto failed_mount; 359856889787STheodore Ts'o } 3599*923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3600*923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3601*923ae0ffSRoss Zwisler "both data=journal and dax"); 3602*923ae0ffSRoss Zwisler goto failed_mount; 3603*923ae0ffSRoss Zwisler } 360456889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 360556889787STheodore Ts'o clear_opt(sb, DELALLOC); 360656889787STheodore Ts'o } 360756889787STheodore Ts'o 3608ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3609482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3610ac27a0ecSDave Kleikamp 3611617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3612617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3613617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3614617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3615b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3616b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3617b31e1552SEric Sandeen "running e2fsck is recommended"); 3618469108ffSTheodore Tso 3619ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3620ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3621ed3654ebSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, 3622ed3654ebSTheodore Ts'o EXT4_FEATURE_INCOMPAT_64BIT)) { 3623ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3624ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3625ed3654ebSTheodore Ts'o goto failed_mount; 3626ed3654ebSTheodore Ts'o } 3627ed3654ebSTheodore Ts'o } 3628ed3654ebSTheodore Ts'o 36292035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36302035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36312035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36322035e776STheodore Ts'o "using the ext4 subsystem"); 36332035e776STheodore Ts'o else { 36342035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36352035e776STheodore Ts'o "to feature incompatibilities"); 36362035e776STheodore Ts'o goto failed_mount; 36372035e776STheodore Ts'o } 36382035e776STheodore Ts'o } 36392035e776STheodore Ts'o 36402035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36412035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36422035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36432035e776STheodore Ts'o "using the ext4 subsystem"); 36442035e776STheodore Ts'o else { 36452035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36462035e776STheodore Ts'o "to feature incompatibilities"); 36472035e776STheodore Ts'o goto failed_mount; 36482035e776STheodore Ts'o } 36492035e776STheodore Ts'o } 36502035e776STheodore Ts'o 3651469108ffSTheodore Tso /* 3652ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3653ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3654ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3655ac27a0ecSDave Kleikamp */ 3656a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3657ac27a0ecSDave Kleikamp goto failed_mount; 3658a13fb1a4SEric Sandeen 3659261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3660617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3661617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3662b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3663b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3664ac27a0ecSDave Kleikamp goto failed_mount; 3665ac27a0ecSDave Kleikamp } 3666ac27a0ecSDave Kleikamp 3667*923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 3668*923ae0ffSRoss Zwisler if (blocksize != PAGE_SIZE) { 3669*923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, 3670*923ae0ffSRoss Zwisler "error: unsupported blocksize for dax"); 3671*923ae0ffSRoss Zwisler goto failed_mount; 3672*923ae0ffSRoss Zwisler } 3673*923ae0ffSRoss Zwisler if (!sb->s_bdev->bd_disk->fops->direct_access) { 3674*923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, 3675*923ae0ffSRoss Zwisler "error: device does not support dax"); 3676*923ae0ffSRoss Zwisler goto failed_mount; 3677*923ae0ffSRoss Zwisler } 3678*923ae0ffSRoss Zwisler } 3679*923ae0ffSRoss Zwisler 3680ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3681ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3682ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3683b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3684ce40733cSAneesh Kumar K.V blocksize); 3685ac27a0ecSDave Kleikamp goto failed_mount; 3686ac27a0ecSDave Kleikamp } 3687ac27a0ecSDave Kleikamp 3688ac27a0ecSDave Kleikamp brelse(bh); 368970bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 369070bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3691a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3692ac27a0ecSDave Kleikamp if (!bh) { 3693b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3694b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3695ac27a0ecSDave Kleikamp goto failed_mount; 3696ac27a0ecSDave Kleikamp } 36972716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3698ac27a0ecSDave Kleikamp sbi->s_es = es; 3699617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3700b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3701b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3702ac27a0ecSDave Kleikamp goto failed_mount; 3703ac27a0ecSDave Kleikamp } 3704ac27a0ecSDave Kleikamp } 3705ac27a0ecSDave Kleikamp 3706a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3707a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3708f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3709f287a1a5STheodore Ts'o has_huge_files); 3710f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3711ac27a0ecSDave Kleikamp 3712617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3713617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3714617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3715ac27a0ecSDave Kleikamp } else { 3716ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3717ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3718617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 37191330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3720ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3721b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3722b31e1552SEric Sandeen "unsupported inode size: %d", 3723ac27a0ecSDave Kleikamp sbi->s_inode_size); 3724ac27a0ecSDave Kleikamp goto failed_mount; 3725ac27a0ecSDave Kleikamp } 3726ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3727ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3728ac27a0ecSDave Kleikamp } 37290b8e58a1SAndreas Dilger 37300d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 37310d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 37328fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 37330d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3734d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3735b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3736b31e1552SEric Sandeen "unsupported descriptor size %lu", 37370d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37380d1ee42fSAlexandre Ratchov goto failed_mount; 37390d1ee42fSAlexandre Ratchov } 37400d1ee42fSAlexandre Ratchov } else 37410d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37420b8e58a1SAndreas Dilger 3743ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3744ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3745b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3746617ba13bSMingming Cao goto cantfind_ext4; 37470b8e58a1SAndreas Dilger 3748617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3749ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3750617ba13bSMingming Cao goto cantfind_ext4; 3751ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3752ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37530d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3754ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3755ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3756e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3757e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37580b8e58a1SAndreas Dilger 3759ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3760ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3761ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 376223301410STheodore Ts'o if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { 3763f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3764f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3765f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3766f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3767f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 376823301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 376923301410STheodore Ts'o es->s_flags |= 377023301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3771f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3772f99b2589STheodore Ts'o #else 377323301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 377423301410STheodore Ts'o es->s_flags |= 377523301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3776f99b2589STheodore Ts'o #endif 3777f99b2589STheodore Ts'o } 377823301410STheodore Ts'o } 3779ac27a0ecSDave Kleikamp 3780281b5995STheodore Ts'o /* Handle clustersize */ 3781281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3782281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3783281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3784281b5995STheodore Ts'o if (has_bigalloc) { 3785281b5995STheodore Ts'o if (clustersize < blocksize) { 3786281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3787281b5995STheodore Ts'o "cluster size (%d) smaller than " 3788281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3789281b5995STheodore Ts'o goto failed_mount; 3790281b5995STheodore Ts'o } 3791281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3792281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3793281b5995STheodore Ts'o sbi->s_clusters_per_group = 3794281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3795281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3796281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3797281b5995STheodore Ts'o "#clusters per group too big: %lu", 3798281b5995STheodore Ts'o sbi->s_clusters_per_group); 3799281b5995STheodore Ts'o goto failed_mount; 3800281b5995STheodore Ts'o } 3801281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3802281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3803281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3804281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3805281b5995STheodore Ts'o sbi->s_blocks_per_group, 3806281b5995STheodore Ts'o sbi->s_clusters_per_group); 3807281b5995STheodore Ts'o goto failed_mount; 3808281b5995STheodore Ts'o } 3809281b5995STheodore Ts'o } else { 3810281b5995STheodore Ts'o if (clustersize != blocksize) { 3811281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3812281b5995STheodore Ts'o "block size (%d)", clustersize, 3813281b5995STheodore Ts'o blocksize); 3814281b5995STheodore Ts'o clustersize = blocksize; 3815281b5995STheodore Ts'o } 3816ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3817b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3818b31e1552SEric Sandeen "#blocks per group too big: %lu", 3819ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3820ac27a0ecSDave Kleikamp goto failed_mount; 3821ac27a0ecSDave Kleikamp } 3822281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3823281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3824281b5995STheodore Ts'o } 3825281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3826281b5995STheodore Ts'o 3827ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3828b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3829b31e1552SEric Sandeen "#inodes per group too big: %lu", 3830ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3831ac27a0ecSDave Kleikamp goto failed_mount; 3832ac27a0ecSDave Kleikamp } 3833ac27a0ecSDave Kleikamp 3834960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3835960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3836960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3837960fd856STheodore Ts'o 3838bf43d84bSEric Sandeen /* 3839bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3840bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3841bf43d84bSEric Sandeen */ 38425a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 384330ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38445a9ae68aSDarrick J. Wong if (err) { 3845b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3846bf43d84bSEric Sandeen " too large to mount safely on this system"); 3847ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 384890c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3849ac27a0ecSDave Kleikamp goto failed_mount; 3850ac27a0ecSDave Kleikamp } 3851ac27a0ecSDave Kleikamp 3852617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3853617ba13bSMingming Cao goto cantfind_ext4; 3854e7c95593SEric Sandeen 38550f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38560f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38570f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3858b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3859b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38600f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38610f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38620f2ddca6SFrom: Thiemo Nagel } 38630f2ddca6SFrom: Thiemo Nagel 38644ec11028STheodore Ts'o /* 38654ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38664ec11028STheodore Ts'o * of the filesystem. 38674ec11028STheodore Ts'o */ 38684ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3869b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3870b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3871e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38724ec11028STheodore Ts'o ext4_blocks_count(es)); 3873e7c95593SEric Sandeen goto failed_mount; 3874e7c95593SEric Sandeen } 3875bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3876bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3877bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3878bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 38794ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3880b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 38814ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3882b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 38834ec11028STheodore Ts'o ext4_blocks_count(es), 38844ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 38854ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 38864ec11028STheodore Ts'o goto failed_mount; 38874ec11028STheodore Ts'o } 3888bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3889fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3890fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3891617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3892617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3893f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3894f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3895ac27a0ecSDave Kleikamp GFP_KERNEL); 3896ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3897b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 38982cde417dSTheodore Ts'o ret = -ENOMEM; 3899ac27a0ecSDave Kleikamp goto failed_mount; 3900ac27a0ecSDave Kleikamp } 3901ac27a0ecSDave Kleikamp 39029f6200bbSTheodore Ts'o if (ext4_proc_root) 39039f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3904240799cdSTheodore Ts'o 390566acdcf4STheodore Ts'o if (sbi->s_proc) 390666acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 390766acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 390866acdcf4STheodore Ts'o 3909705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3910ac27a0ecSDave Kleikamp 3911ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 391270bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3913a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3914ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3915b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3916b31e1552SEric Sandeen "can't read group descriptor %d", i); 3917ac27a0ecSDave Kleikamp db_count = i; 3918ac27a0ecSDave Kleikamp goto failed_mount2; 3919ac27a0ecSDave Kleikamp } 3920ac27a0ecSDave Kleikamp } 3921bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3922b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3923f9ae9cf5STheodore Ts'o goto failed_mount2; 3924ac27a0ecSDave Kleikamp } 3925772cb7c8SJose R. Santos 3926f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3927ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3928ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3929ac27a0ecSDave Kleikamp 393004496411STao Ma init_timer(&sbi->s_err_report); 393104496411STao Ma sbi->s_err_report.function = print_daily_error_info; 393204496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 393304496411STao Ma 3934a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3935eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3936ce7e010aSTheodore Ts'o goto failed_mount3; 3937ce7e010aSTheodore Ts'o 3938c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 393967a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3940c9de560dSAlex Tomas 3941f9ae9cf5STheodore Ts'o /* 3942f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3943f9ae9cf5STheodore Ts'o */ 3944f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3945617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3946617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3947ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3948617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3949262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 39501fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 3951262b4662SJan Kara else 3952262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 395396c7e0d9SJan Kara sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 3954ac27a0ecSDave Kleikamp #endif 3955f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3956f2fa2ffcSAneesh Kumar K.V 3957ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39583b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3959ac27a0ecSDave Kleikamp 3960ac27a0ecSDave Kleikamp sb->s_root = NULL; 3961ac27a0ecSDave Kleikamp 3962ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3963617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3964617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3965ac27a0ecSDave Kleikamp 3966c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3967c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3968c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 396950460fe8SDarrick J. Wong goto failed_mount3a; 3970c5e06d10SJohann Lombardi 3971ac27a0ecSDave Kleikamp /* 3972ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3973ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3974ac27a0ecSDave Kleikamp */ 3975ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3976617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3977617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 397850460fe8SDarrick J. Wong goto failed_mount3a; 39790390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 39800390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3981b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3982b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3983744692dcSJiaying Zhang goto failed_mount_wq; 3984ac27a0ecSDave Kleikamp } else { 3985fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 39860390131bSFrank Mayhar sbi->s_journal = NULL; 39870390131bSFrank Mayhar needs_recovery = 0; 39880390131bSFrank Mayhar goto no_journal; 3989ac27a0ecSDave Kleikamp } 3990ac27a0ecSDave Kleikamp 3991f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3992eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3993eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3994b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3995744692dcSJiaying Zhang goto failed_mount_wq; 3996eb40a09cSJose R. Santos } 3997eb40a09cSJose R. Santos 399825ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 399925ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 400025ed6e8aSDarrick J. Wong "feature set"); 400125ed6e8aSDarrick J. Wong goto failed_mount_wq; 4002d4da6c9cSLinus Torvalds } 4003818d276cSGirish Shilamkar 4004ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4005ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4006ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4007ac27a0ecSDave Kleikamp case 0: 4008ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 400963f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 401063f57933SAndrew Morton * cope, else JOURNAL_DATA 401163f57933SAndrew Morton */ 4012dab291afSMingming Cao if (jbd2_journal_check_available_features 4013dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 4014fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4015ac27a0ecSDave Kleikamp else 4016fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4017ac27a0ecSDave Kleikamp break; 4018ac27a0ecSDave Kleikamp 4019617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4020617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4021dab291afSMingming Cao if (!jbd2_journal_check_available_features 4022dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4023b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4024b31e1552SEric Sandeen "requested data journaling mode"); 4025744692dcSJiaying Zhang goto failed_mount_wq; 4026ac27a0ecSDave Kleikamp } 4027ac27a0ecSDave Kleikamp default: 4028ac27a0ecSDave Kleikamp break; 4029ac27a0ecSDave Kleikamp } 4030b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4031ac27a0ecSDave Kleikamp 403218aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 403318aadd47SBobi Jam 4034ce7e010aSTheodore Ts'o no_journal: 40359c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 40369c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 40379c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40389c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40399c191f70ST Makphaibulchoke goto failed_mount_wq; 40409c191f70ST Makphaibulchoke } 40419c191f70ST Makphaibulchoke } 40429c191f70ST Makphaibulchoke 4043fd89d5f2STejun Heo /* 4044952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4045952fc18eSTheodore Ts'o * superblock if present. 4046952fc18eSTheodore Ts'o */ 4047952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4048952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4049952fc18eSTheodore Ts'o else { 405007aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 405107aa2ea1SLukas Czerner if (err) 4052952fc18eSTheodore Ts'o goto failed_mount_wq; 4053952fc18eSTheodore Ts'o } 4054952fc18eSTheodore Ts'o 4055952fc18eSTheodore Ts'o /* 4056fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4057fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4058fd89d5f2STejun Heo */ 40592e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40602e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40612e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40622e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 406307aa2ea1SLukas Czerner ret = -ENOMEM; 40642e8fa54eSJan Kara goto failed_mount4; 40652e8fa54eSJan Kara } 40662e8fa54eSJan Kara 4067ac27a0ecSDave Kleikamp /* 4068dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4069ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4070ac27a0ecSDave Kleikamp */ 4071ac27a0ecSDave Kleikamp 40721d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 40731d1fe1eeSDavid Howells if (IS_ERR(root)) { 4074b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 40751d1fe1eeSDavid Howells ret = PTR_ERR(root); 407632a9bb57SManish Katiyar root = NULL; 4077ac27a0ecSDave Kleikamp goto failed_mount4; 4078ac27a0ecSDave Kleikamp } 4079ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4080b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 408194bf608aSAl Viro iput(root); 4082ac27a0ecSDave Kleikamp goto failed_mount4; 4083ac27a0ecSDave Kleikamp } 408448fde701SAl Viro sb->s_root = d_make_root(root); 40851d1fe1eeSDavid Howells if (!sb->s_root) { 4086b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 40871d1fe1eeSDavid Howells ret = -ENOMEM; 40881d1fe1eeSDavid Howells goto failed_mount4; 40891d1fe1eeSDavid Howells } 4090ac27a0ecSDave Kleikamp 40917e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 40927e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4093ef7f3835SKalpak Shah 4094ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4095ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 4096ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4097ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4098ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 4099ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 4100ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4101ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4102ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4103ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4104ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4105ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4106ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4107ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4108ef7f3835SKalpak Shah } 4109ef7f3835SKalpak Shah } 4110ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4111ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4112ef7f3835SKalpak Shah sbi->s_inode_size) { 4113ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4114ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4115b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4116b31e1552SEric Sandeen "available"); 4117ef7f3835SKalpak Shah } 4118ef7f3835SKalpak Shah 411930fac0f7SJan Kara err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); 412027dd4385SLukas Czerner if (err) { 412127dd4385SLukas Czerner ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " 412230fac0f7SJan Kara "reserved pool", ext4_calculate_resv_clusters(sb)); 4123f9ae9cf5STheodore Ts'o goto failed_mount4a; 412427dd4385SLukas Czerner } 412527dd4385SLukas Czerner 41266fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 41276fd058f7STheodore Ts'o if (err) { 4128b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4129fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4130f9ae9cf5STheodore Ts'o goto failed_mount4a; 4131f9ae9cf5STheodore Ts'o } 4132f9ae9cf5STheodore Ts'o 4133f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4134f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4135f9ae9cf5STheodore Ts'o if (err) { 4136f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4137f9ae9cf5STheodore Ts'o err); 4138dcf2d804STao Ma goto failed_mount5; 4139c2774d84SAneesh Kumar K.V } 4140c2774d84SAneesh Kumar K.V 4141d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4142d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4143d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4144908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4145908c7f19STejun Heo GFP_KERNEL); 4146d5e03cbbSTheodore Ts'o if (!err) { 4147d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4148d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4149908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4150908c7f19STejun Heo GFP_KERNEL); 4151d5e03cbbSTheodore Ts'o } 4152d5e03cbbSTheodore Ts'o if (!err) 4153d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4154908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4155d5e03cbbSTheodore Ts'o if (!err) 4156908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4157908c7f19STejun Heo GFP_KERNEL); 4158d5e03cbbSTheodore Ts'o if (err) { 4159d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4160d5e03cbbSTheodore Ts'o goto failed_mount6; 4161d5e03cbbSTheodore Ts'o } 4162d5e03cbbSTheodore Ts'o 4163d5e03cbbSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 4164d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4165d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4166d5e03cbbSTheodore Ts'o "unable to initialize " 4167d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4168d5e03cbbSTheodore Ts'o goto failed_mount6; 4169d5e03cbbSTheodore Ts'o } 4170d5e03cbbSTheodore Ts'o 4171bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4172bfff6873SLukas Czerner if (err) 4173dcf2d804STao Ma goto failed_mount6; 4174bfff6873SLukas Czerner 41753197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 41763197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 41773197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 41783197ebdbSTheodore Ts'o "%s", sb->s_id); 4179dcf2d804STao Ma if (err) 4180dcf2d804STao Ma goto failed_mount7; 41813197ebdbSTheodore Ts'o 41829b2ff357SJan Kara #ifdef CONFIG_QUOTA 41839b2ff357SJan Kara /* Enable quota usage during mount. */ 41849b2ff357SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 41859b2ff357SJan Kara !(sb->s_flags & MS_RDONLY)) { 41869b2ff357SJan Kara err = ext4_enable_quotas(sb); 41879b2ff357SJan Kara if (err) 41889b2ff357SJan Kara goto failed_mount8; 41899b2ff357SJan Kara } 41909b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 41919b2ff357SJan Kara 4192617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4193617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4194617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 41950390131bSFrank Mayhar if (needs_recovery) { 4196b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4197617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 41980390131bSFrank Mayhar } 41990390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 42000390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 42010390131bSFrank Mayhar descr = " journalled data mode"; 42020390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 42030390131bSFrank Mayhar descr = " ordered data mode"; 42040390131bSFrank Mayhar else 42050390131bSFrank Mayhar descr = " writeback data mode"; 42060390131bSFrank Mayhar } else 42070390131bSFrank Mayhar descr = "out journal"; 42080390131bSFrank Mayhar 420979add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 421079add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 421179add3a3SLukas Czerner if (!blk_queue_discard(q)) 421279add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 421379add3a3SLukas Czerner "mounting with \"discard\" option, but " 421479add3a3SLukas Czerner "the device does not support discard"); 421579add3a3SLukas Czerner } 421679add3a3SLukas Czerner 4217d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 42188b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 42198b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4220ac27a0ecSDave Kleikamp 422166e61a9eSTheodore Ts'o if (es->s_error_count) 422266e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4223ac27a0ecSDave Kleikamp 4224efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4225efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4226efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4227efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4228efbed4dcSTheodore Ts'o 4229d4c402d9SCurt Wohlgemuth kfree(orig_data); 4230ac27a0ecSDave Kleikamp return 0; 4231ac27a0ecSDave Kleikamp 4232617ba13bSMingming Cao cantfind_ext4: 4233ac27a0ecSDave Kleikamp if (!silent) 4234b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4235ac27a0ecSDave Kleikamp goto failed_mount; 4236ac27a0ecSDave Kleikamp 423772ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 423872ba7450STheodore Ts'o failed_mount8: 423972ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 424072ba7450STheodore Ts'o #endif 4241dcf2d804STao Ma failed_mount7: 4242dcf2d804STao Ma ext4_unregister_li_request(sb); 4243dcf2d804STao Ma failed_mount6: 4244f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4245d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4246b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4247d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4248d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4249d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4250d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 425100764937SAzat Khuzhin failed_mount5: 4252f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4253f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4254f9ae9cf5STheodore Ts'o failed_mount4a: 425594bf608aSAl Viro dput(sb->s_root); 425632a9bb57SManish Katiyar sb->s_root = NULL; 425794bf608aSAl Viro failed_mount4: 4258b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 42592e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 42602e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 42614c0425ffSMingming Cao failed_mount_wq: 42620390131bSFrank Mayhar if (sbi->s_journal) { 4263dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 426447b4a50bSJan Kara sbi->s_journal = NULL; 42650390131bSFrank Mayhar } 426650460fe8SDarrick J. Wong failed_mount3a: 4267d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4268eb68d0e2SZheng Liu failed_mount3: 42699105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4270c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4271c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4272ac27a0ecSDave Kleikamp failed_mount2: 4273ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4274ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4275b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4276ac27a0ecSDave Kleikamp failed_mount: 42770441984aSDarrick J. Wong if (sbi->s_chksum_driver) 42780441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4279240799cdSTheodore Ts'o if (sbi->s_proc) { 428066acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 42819f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4282240799cdSTheodore Ts'o } 4283ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4284a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4285ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4286ac27a0ecSDave Kleikamp #endif 4287617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4288ac27a0ecSDave Kleikamp brelse(bh); 4289ac27a0ecSDave Kleikamp out_fail: 4290ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4291f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4292ac27a0ecSDave Kleikamp kfree(sbi); 4293dcc7dae3SCyrill Gorcunov out_free_orig: 4294d4c402d9SCurt Wohlgemuth kfree(orig_data); 429507aa2ea1SLukas Czerner return err ? err : ret; 4296ac27a0ecSDave Kleikamp } 4297ac27a0ecSDave Kleikamp 4298ac27a0ecSDave Kleikamp /* 4299ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4300ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4301ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4302ac27a0ecSDave Kleikamp */ 4303617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4304ac27a0ecSDave Kleikamp { 4305617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4306ac27a0ecSDave Kleikamp 4307ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 430830773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 430930773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4310ac27a0ecSDave Kleikamp 4311a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4312ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4313dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4314ac27a0ecSDave Kleikamp else 4315dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 43165bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 43175bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 43185bf5683aSHidehiro Kawai else 43195bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4320a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4321ac27a0ecSDave Kleikamp } 4322ac27a0ecSDave Kleikamp 4323617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4324ac27a0ecSDave Kleikamp unsigned int journal_inum) 4325ac27a0ecSDave Kleikamp { 4326ac27a0ecSDave Kleikamp struct inode *journal_inode; 4327ac27a0ecSDave Kleikamp journal_t *journal; 4328ac27a0ecSDave Kleikamp 43290390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43300390131bSFrank Mayhar 4331ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4332ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4333ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4334ac27a0ecSDave Kleikamp 43351d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43361d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4337b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4338ac27a0ecSDave Kleikamp return NULL; 4339ac27a0ecSDave Kleikamp } 4340ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4341ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4342ac27a0ecSDave Kleikamp iput(journal_inode); 4343b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4344ac27a0ecSDave Kleikamp return NULL; 4345ac27a0ecSDave Kleikamp } 4346ac27a0ecSDave Kleikamp 4347e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4348ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 43491d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4350b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4351ac27a0ecSDave Kleikamp iput(journal_inode); 4352ac27a0ecSDave Kleikamp return NULL; 4353ac27a0ecSDave Kleikamp } 4354ac27a0ecSDave Kleikamp 4355dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4356ac27a0ecSDave Kleikamp if (!journal) { 4357b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4358ac27a0ecSDave Kleikamp iput(journal_inode); 4359ac27a0ecSDave Kleikamp return NULL; 4360ac27a0ecSDave Kleikamp } 4361ac27a0ecSDave Kleikamp journal->j_private = sb; 4362617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4363ac27a0ecSDave Kleikamp return journal; 4364ac27a0ecSDave Kleikamp } 4365ac27a0ecSDave Kleikamp 4366617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4367ac27a0ecSDave Kleikamp dev_t j_dev) 4368ac27a0ecSDave Kleikamp { 4369ac27a0ecSDave Kleikamp struct buffer_head *bh; 4370ac27a0ecSDave Kleikamp journal_t *journal; 4371617ba13bSMingming Cao ext4_fsblk_t start; 4372617ba13bSMingming Cao ext4_fsblk_t len; 4373ac27a0ecSDave Kleikamp int hblock, blocksize; 4374617ba13bSMingming Cao ext4_fsblk_t sb_block; 4375ac27a0ecSDave Kleikamp unsigned long offset; 4376617ba13bSMingming Cao struct ext4_super_block *es; 4377ac27a0ecSDave Kleikamp struct block_device *bdev; 4378ac27a0ecSDave Kleikamp 43790390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43800390131bSFrank Mayhar 4381b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4382ac27a0ecSDave Kleikamp if (bdev == NULL) 4383ac27a0ecSDave Kleikamp return NULL; 4384ac27a0ecSDave Kleikamp 4385ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4386e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4387ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4388b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4389b31e1552SEric Sandeen "blocksize too small for journal device"); 4390ac27a0ecSDave Kleikamp goto out_bdev; 4391ac27a0ecSDave Kleikamp } 4392ac27a0ecSDave Kleikamp 4393617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4394617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4395ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4396ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4397b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4398b31e1552SEric Sandeen "external journal"); 4399ac27a0ecSDave Kleikamp goto out_bdev; 4400ac27a0ecSDave Kleikamp } 4401ac27a0ecSDave Kleikamp 44022716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4403617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4404ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4405617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4406b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4407b31e1552SEric Sandeen "bad superblock"); 4408ac27a0ecSDave Kleikamp brelse(bh); 4409ac27a0ecSDave Kleikamp goto out_bdev; 4410ac27a0ecSDave Kleikamp } 4411ac27a0ecSDave Kleikamp 4412df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4413df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4414df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4415df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4416df4763beSDarrick J. Wong "corrupt superblock"); 4417df4763beSDarrick J. Wong brelse(bh); 4418df4763beSDarrick J. Wong goto out_bdev; 4419df4763beSDarrick J. Wong } 4420df4763beSDarrick J. Wong 4421617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4422b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4423ac27a0ecSDave Kleikamp brelse(bh); 4424ac27a0ecSDave Kleikamp goto out_bdev; 4425ac27a0ecSDave Kleikamp } 4426ac27a0ecSDave Kleikamp 4427bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4428ac27a0ecSDave Kleikamp start = sb_block + 1; 4429ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4430ac27a0ecSDave Kleikamp 4431dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4432ac27a0ecSDave Kleikamp start, len, blocksize); 4433ac27a0ecSDave Kleikamp if (!journal) { 4434b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4435ac27a0ecSDave Kleikamp goto out_bdev; 4436ac27a0ecSDave Kleikamp } 4437ac27a0ecSDave Kleikamp journal->j_private = sb; 44389f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4439ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4440ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4441b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4442ac27a0ecSDave Kleikamp goto out_journal; 4443ac27a0ecSDave Kleikamp } 4444ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4445b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4446b31e1552SEric Sandeen "user (unsupported) - %d", 4447ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4448ac27a0ecSDave Kleikamp goto out_journal; 4449ac27a0ecSDave Kleikamp } 4450617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4451617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4452ac27a0ecSDave Kleikamp return journal; 44530b8e58a1SAndreas Dilger 4454ac27a0ecSDave Kleikamp out_journal: 4455dab291afSMingming Cao jbd2_journal_destroy(journal); 4456ac27a0ecSDave Kleikamp out_bdev: 4457617ba13bSMingming Cao ext4_blkdev_put(bdev); 4458ac27a0ecSDave Kleikamp return NULL; 4459ac27a0ecSDave Kleikamp } 4460ac27a0ecSDave Kleikamp 4461617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4462617ba13bSMingming Cao struct ext4_super_block *es, 4463ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4464ac27a0ecSDave Kleikamp { 4465ac27a0ecSDave Kleikamp journal_t *journal; 4466ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4467ac27a0ecSDave Kleikamp dev_t journal_dev; 4468ac27a0ecSDave Kleikamp int err = 0; 4469ac27a0ecSDave Kleikamp int really_read_only; 4470ac27a0ecSDave Kleikamp 44710390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44720390131bSFrank Mayhar 4473ac27a0ecSDave Kleikamp if (journal_devnum && 4474ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4475b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4476b31e1552SEric Sandeen "numbers have changed"); 4477ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4478ac27a0ecSDave Kleikamp } else 4479ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4480ac27a0ecSDave Kleikamp 4481ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4482ac27a0ecSDave Kleikamp 4483ac27a0ecSDave Kleikamp /* 4484ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4485ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4486ac27a0ecSDave Kleikamp * can get read-write access to the device. 4487ac27a0ecSDave Kleikamp */ 4488617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4489ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4490b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4491b31e1552SEric Sandeen "required on readonly filesystem"); 4492ac27a0ecSDave Kleikamp if (really_read_only) { 4493b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4494b31e1552SEric Sandeen "unavailable, cannot proceed"); 4495ac27a0ecSDave Kleikamp return -EROFS; 4496ac27a0ecSDave Kleikamp } 4497b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4498b31e1552SEric Sandeen "be enabled during recovery"); 4499ac27a0ecSDave Kleikamp } 4500ac27a0ecSDave Kleikamp } 4501ac27a0ecSDave Kleikamp 4502ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4503b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4504b31e1552SEric Sandeen "and inode journals!"); 4505ac27a0ecSDave Kleikamp return -EINVAL; 4506ac27a0ecSDave Kleikamp } 4507ac27a0ecSDave Kleikamp 4508ac27a0ecSDave Kleikamp if (journal_inum) { 4509617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4510ac27a0ecSDave Kleikamp return -EINVAL; 4511ac27a0ecSDave Kleikamp } else { 4512617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4513ac27a0ecSDave Kleikamp return -EINVAL; 4514ac27a0ecSDave Kleikamp } 4515ac27a0ecSDave Kleikamp 451690576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4517b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 45184776004fSTheodore Ts'o 4519617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4520dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 45211c13d5c0STheodore Ts'o if (!err) { 45221c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 45231c13d5c0STheodore Ts'o if (save) 45241c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 45251c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4526dab291afSMingming Cao err = jbd2_journal_load(journal); 45271c13d5c0STheodore Ts'o if (save) 45281c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 45291c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 45301c13d5c0STheodore Ts'o kfree(save); 45311c13d5c0STheodore Ts'o } 4532ac27a0ecSDave Kleikamp 4533ac27a0ecSDave Kleikamp if (err) { 4534b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4535dab291afSMingming Cao jbd2_journal_destroy(journal); 4536ac27a0ecSDave Kleikamp return err; 4537ac27a0ecSDave Kleikamp } 4538ac27a0ecSDave Kleikamp 4539617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4540617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4541ac27a0ecSDave Kleikamp 4542c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4543ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4544ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4545ac27a0ecSDave Kleikamp 4546ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4547e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4548ac27a0ecSDave Kleikamp } 4549ac27a0ecSDave Kleikamp 4550ac27a0ecSDave Kleikamp return 0; 4551ac27a0ecSDave Kleikamp } 4552ac27a0ecSDave Kleikamp 4553e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4554ac27a0ecSDave Kleikamp { 4555e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4556617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4557c4be0c1dSTakashi Sato int error = 0; 4558ac27a0ecSDave Kleikamp 45597c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4560c4be0c1dSTakashi Sato return error; 4561914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4562914258bfSTheodore Ts'o /* 4563914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4564914258bfSTheodore Ts'o * superblock failed. This could happen because the 4565914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4566914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4567914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4568914258bfSTheodore Ts'o * write and hope for the best. 4569914258bfSTheodore Ts'o */ 4570b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4571b31e1552SEric Sandeen "superblock detected"); 4572914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4573914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4574914258bfSTheodore Ts'o } 457571290b36STheodore Ts'o /* 457671290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 457771290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 457871290b36STheodore Ts'o * write time when we are mounting the root file system 457971290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 458071290b36STheodore Ts'o * for people who are east of GMT and who make their clock 458171290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 458271290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 458371290b36STheodore Ts'o * to complain and force a full file system check. 458471290b36STheodore Ts'o */ 458571290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4586ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4587f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4588afc32f7eSTheodore Ts'o es->s_kbytes_written = 4589afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4590afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4591afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4592f613dfcbSTheodore Ts'o else 4593f613dfcbSTheodore Ts'o es->s_kbytes_written = 4594f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4595d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 459657042651STheodore Ts'o ext4_free_blocks_count_set(es, 459757042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 459857042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4599d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 46007f93cff9STheodore Ts'o es->s_free_inodes_count = 46017f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 46025d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4603ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 460406db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4605ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4606914258bfSTheodore Ts'o if (sync) { 4607c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4608c4be0c1dSTakashi Sato if (error) 4609c4be0c1dSTakashi Sato return error; 4610c4be0c1dSTakashi Sato 4611c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4612c4be0c1dSTakashi Sato if (error) { 4613b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4614b31e1552SEric Sandeen "superblock"); 4615914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4616914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4617914258bfSTheodore Ts'o } 4618914258bfSTheodore Ts'o } 4619c4be0c1dSTakashi Sato return error; 4620ac27a0ecSDave Kleikamp } 4621ac27a0ecSDave Kleikamp 4622ac27a0ecSDave Kleikamp /* 4623ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4624ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4625ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4626ac27a0ecSDave Kleikamp */ 4627617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4628617ba13bSMingming Cao struct ext4_super_block *es) 4629ac27a0ecSDave Kleikamp { 4630617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4631ac27a0ecSDave Kleikamp 46320390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 46330390131bSFrank Mayhar BUG_ON(journal != NULL); 46340390131bSFrank Mayhar return; 46350390131bSFrank Mayhar } 4636dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46377ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 46387ffe1ea8SHidehiro Kawai goto out; 46397ffe1ea8SHidehiro Kawai 4640617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4641ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4642617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4643e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4644ac27a0ecSDave Kleikamp } 46457ffe1ea8SHidehiro Kawai 46467ffe1ea8SHidehiro Kawai out: 4647dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4648ac27a0ecSDave Kleikamp } 4649ac27a0ecSDave Kleikamp 4650ac27a0ecSDave Kleikamp /* 4651ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4652ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4653ac27a0ecSDave Kleikamp * main filesystem now. 4654ac27a0ecSDave Kleikamp */ 4655617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4656617ba13bSMingming Cao struct ext4_super_block *es) 4657ac27a0ecSDave Kleikamp { 4658ac27a0ecSDave Kleikamp journal_t *journal; 4659ac27a0ecSDave Kleikamp int j_errno; 4660ac27a0ecSDave Kleikamp const char *errstr; 4661ac27a0ecSDave Kleikamp 46620390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 46630390131bSFrank Mayhar 4664617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4665ac27a0ecSDave Kleikamp 4666ac27a0ecSDave Kleikamp /* 4667ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4668617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4669ac27a0ecSDave Kleikamp */ 4670ac27a0ecSDave Kleikamp 4671dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4672ac27a0ecSDave Kleikamp if (j_errno) { 4673ac27a0ecSDave Kleikamp char nbuf[16]; 4674ac27a0ecSDave Kleikamp 4675617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 467612062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4677ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 467812062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4679ac27a0ecSDave Kleikamp 4680617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4681617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4682e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4683ac27a0ecSDave Kleikamp 4684dab291afSMingming Cao jbd2_journal_clear_err(journal); 4685d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4686ac27a0ecSDave Kleikamp } 4687ac27a0ecSDave Kleikamp } 4688ac27a0ecSDave Kleikamp 4689ac27a0ecSDave Kleikamp /* 4690ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4691ac27a0ecSDave Kleikamp * and wait on the commit. 4692ac27a0ecSDave Kleikamp */ 4693617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4694ac27a0ecSDave Kleikamp { 4695ac27a0ecSDave Kleikamp journal_t *journal; 4696ac27a0ecSDave Kleikamp 4697ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4698ac27a0ecSDave Kleikamp return 0; 4699ac27a0ecSDave Kleikamp 4700617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4701b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4702ac27a0ecSDave Kleikamp } 4703ac27a0ecSDave Kleikamp 4704617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4705ac27a0ecSDave Kleikamp { 470614ce0cb4STheodore Ts'o int ret = 0; 47079eddacf9SJan Kara tid_t target; 470806a407f1SDmitry Monakhov bool needs_barrier = false; 47098d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4710ac27a0ecSDave Kleikamp 47119bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 47122e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4713a1177825SJan Kara /* 4714a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4715a1177825SJan Kara * no dirty dquots 4716a1177825SJan Kara */ 4717a1177825SJan Kara dquot_writeback_dquots(sb, -1); 471806a407f1SDmitry Monakhov /* 471906a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 472006a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 472106a407f1SDmitry Monakhov * transaction_commit will do it for us. 472206a407f1SDmitry Monakhov */ 4723bda32530STheodore Ts'o if (sbi->s_journal) { 472406a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 472506a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 472606a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 472706a407f1SDmitry Monakhov needs_barrier = true; 472806a407f1SDmitry Monakhov 47298d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4730ac27a0ecSDave Kleikamp if (wait) 4731bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4732bda32530STheodore Ts'o target); 47330390131bSFrank Mayhar } 4734bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4735bda32530STheodore Ts'o needs_barrier = true; 473606a407f1SDmitry Monakhov if (needs_barrier) { 473706a407f1SDmitry Monakhov int err; 473806a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 473906a407f1SDmitry Monakhov if (!ret) 474006a407f1SDmitry Monakhov ret = err; 474106a407f1SDmitry Monakhov } 474206a407f1SDmitry Monakhov 474306a407f1SDmitry Monakhov return ret; 474406a407f1SDmitry Monakhov } 474506a407f1SDmitry Monakhov 4746ac27a0ecSDave Kleikamp /* 4747ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4748ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4749be4f27d3SYongqiang Yang * 4750be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 47518e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 47528e8ad8a5SJan Kara * modifications. 4753ac27a0ecSDave Kleikamp */ 4754c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4755ac27a0ecSDave Kleikamp { 4756c4be0c1dSTakashi Sato int error = 0; 4757c4be0c1dSTakashi Sato journal_t *journal; 4758ac27a0ecSDave Kleikamp 47599ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47609ca92389STheodore Ts'o return 0; 47619ca92389STheodore Ts'o 4762c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4763ac27a0ecSDave Kleikamp 4764bb044576STheodore Ts'o if (journal) { 4765ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4766dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47677ffe1ea8SHidehiro Kawai 47687ffe1ea8SHidehiro Kawai /* 4769bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4770bb044576STheodore Ts'o * flush the journal. 47717ffe1ea8SHidehiro Kawai */ 4772c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 47736b0310fbSEric Sandeen if (error < 0) 47746b0310fbSEric Sandeen goto out; 4775bb044576STheodore Ts'o } 4776ac27a0ecSDave Kleikamp 4777ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4778617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4779e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 47806b0310fbSEric Sandeen out: 4781bb044576STheodore Ts'o if (journal) 47828e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4783bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 47846b0310fbSEric Sandeen return error; 4785ac27a0ecSDave Kleikamp } 4786ac27a0ecSDave Kleikamp 4787ac27a0ecSDave Kleikamp /* 4788ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4789ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4790ac27a0ecSDave Kleikamp */ 4791c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4792ac27a0ecSDave Kleikamp { 47939ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47949ca92389STheodore Ts'o return 0; 47959ca92389STheodore Ts'o 47969ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4797617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4798e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4799c4be0c1dSTakashi Sato return 0; 4800ac27a0ecSDave Kleikamp } 4801ac27a0ecSDave Kleikamp 4802673c6100STheodore Ts'o /* 4803673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4804673c6100STheodore Ts'o */ 4805673c6100STheodore Ts'o struct ext4_mount_options { 4806673c6100STheodore Ts'o unsigned long s_mount_opt; 4807a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 480808cefc7aSEric W. Biederman kuid_t s_resuid; 480908cefc7aSEric W. Biederman kgid_t s_resgid; 4810673c6100STheodore Ts'o unsigned long s_commit_interval; 4811673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4812673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4813673c6100STheodore Ts'o int s_jquota_fmt; 4814a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4815673c6100STheodore Ts'o #endif 4816673c6100STheodore Ts'o }; 4817673c6100STheodore Ts'o 4818617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4819ac27a0ecSDave Kleikamp { 4820617ba13bSMingming Cao struct ext4_super_block *es; 4821617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4822ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4823617ba13bSMingming Cao struct ext4_mount_options old_opts; 4824c79d967dSChristoph Hellwig int enable_quota = 0; 48258a266467STheodore Ts'o ext4_group_t g; 4826b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4827c5e06d10SJohann Lombardi int err = 0; 4828ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 482903dafb5fSChen Gang int i, j; 4830ac27a0ecSDave Kleikamp #endif 4831d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4832ac27a0ecSDave Kleikamp 4833ac27a0ecSDave Kleikamp /* Store the original options */ 4834ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4835ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4836a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4837ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4838ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4839ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 484030773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 484130773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4842ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4843ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4844a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 484503dafb5fSChen Gang if (sbi->s_qf_names[i]) { 484603dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 484703dafb5fSChen Gang GFP_KERNEL); 484803dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 484903dafb5fSChen Gang for (j = 0; j < i; j++) 485003dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 48513e36a163SWei Yongjun kfree(orig_data); 485203dafb5fSChen Gang return -ENOMEM; 485303dafb5fSChen Gang } 485403dafb5fSChen Gang } else 485503dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4856ac27a0ecSDave Kleikamp #endif 4857b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4858b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4859ac27a0ecSDave Kleikamp 4860ac27a0ecSDave Kleikamp /* 4861ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4862ac27a0ecSDave Kleikamp */ 4863661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4864ac27a0ecSDave Kleikamp err = -EINVAL; 4865ac27a0ecSDave Kleikamp goto restore_opts; 4866ac27a0ecSDave Kleikamp } 4867ac27a0ecSDave Kleikamp 48686b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 48696b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 48706b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 48716b992ff2SDarrick J. Wong "during remount not supported"); 48726b992ff2SDarrick J. Wong err = -EINVAL; 48736b992ff2SDarrick J. Wong goto restore_opts; 48746b992ff2SDarrick J. Wong } 48756b992ff2SDarrick J. Wong 4876c6d3d56dSDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 4877c6d3d56dSDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 4878c6d3d56dSDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 4879c6d3d56dSDarrick J. Wong "during remount not supported"); 4880c6d3d56dSDarrick J. Wong err = -EINVAL; 4881c6d3d56dSDarrick J. Wong goto restore_opts; 4882c6d3d56dSDarrick J. Wong } 4883c6d3d56dSDarrick J. Wong 48846ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 48856ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 48866ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48876ae6514bSPiotr Sarna "both data=journal and delalloc"); 48886ae6514bSPiotr Sarna err = -EINVAL; 48896ae6514bSPiotr Sarna goto restore_opts; 48906ae6514bSPiotr Sarna } 48916ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 48926ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48936ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 48946ae6514bSPiotr Sarna err = -EINVAL; 48956ae6514bSPiotr Sarna goto restore_opts; 48966ae6514bSPiotr Sarna } 4897*923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 4898*923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4899*923ae0ffSRoss Zwisler "both data=journal and dax"); 4900*923ae0ffSRoss Zwisler err = -EINVAL; 4901*923ae0ffSRoss Zwisler goto restore_opts; 4902*923ae0ffSRoss Zwisler } 4903*923ae0ffSRoss Zwisler } 4904*923ae0ffSRoss Zwisler 4905*923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 4906*923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 4907*923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 4908*923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 49096ae6514bSPiotr Sarna } 49106ae6514bSPiotr Sarna 49114ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4912c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4913ac27a0ecSDave Kleikamp 4914ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4915482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4916ac27a0ecSDave Kleikamp 4917ac27a0ecSDave Kleikamp es = sbi->s_es; 4918ac27a0ecSDave Kleikamp 4919b3881f74STheodore Ts'o if (sbi->s_journal) { 4920617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4921b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4922b3881f74STheodore Ts'o } 4923ac27a0ecSDave Kleikamp 4924661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 49254ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4926ac27a0ecSDave Kleikamp err = -EROFS; 4927ac27a0ecSDave Kleikamp goto restore_opts; 4928ac27a0ecSDave Kleikamp } 4929ac27a0ecSDave Kleikamp 4930ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 493138c03b34STheodore Ts'o err = sync_filesystem(sb); 493238c03b34STheodore Ts'o if (err < 0) 493338c03b34STheodore Ts'o goto restore_opts; 49340f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 49350f0dd62fSChristoph Hellwig if (err < 0) 4936c79d967dSChristoph Hellwig goto restore_opts; 4937c79d967dSChristoph Hellwig 4938ac27a0ecSDave Kleikamp /* 4939ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4940ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4941ac27a0ecSDave Kleikamp */ 4942ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4943ac27a0ecSDave Kleikamp 4944ac27a0ecSDave Kleikamp /* 4945ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4946ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4947ac27a0ecSDave Kleikamp * mark the partition as valid again. 4948ac27a0ecSDave Kleikamp */ 4949617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4950617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4951ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4952ac27a0ecSDave Kleikamp 4953a63c9eb2STheodore Ts'o if (sbi->s_journal) 4954617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4955ac27a0ecSDave Kleikamp } else { 4956a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4957a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4958ac27a0ecSDave Kleikamp err = -EROFS; 4959ac27a0ecSDave Kleikamp goto restore_opts; 4960ac27a0ecSDave Kleikamp } 4961ead6596bSEric Sandeen /* 49628a266467STheodore Ts'o * Make sure the group descriptor checksums 49630b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 49648a266467STheodore Ts'o */ 49658a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 49668a266467STheodore Ts'o struct ext4_group_desc *gdp = 49678a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 49688a266467STheodore Ts'o 4969feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4970b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4971b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 49728a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 49738a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 49748a266467STheodore Ts'o err = -EINVAL; 49758a266467STheodore Ts'o goto restore_opts; 49768a266467STheodore Ts'o } 49778a266467STheodore Ts'o } 49788a266467STheodore Ts'o 49798a266467STheodore Ts'o /* 4980ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4981ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4982ead6596bSEric Sandeen * require a full umount/remount for now. 4983ead6596bSEric Sandeen */ 4984ead6596bSEric Sandeen if (es->s_last_orphan) { 4985b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4986ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4987ead6596bSEric Sandeen "orphan inode list. Please " 4988b31e1552SEric Sandeen "umount/remount instead"); 4989ead6596bSEric Sandeen err = -EINVAL; 4990ead6596bSEric Sandeen goto restore_opts; 4991ead6596bSEric Sandeen } 4992ead6596bSEric Sandeen 4993ac27a0ecSDave Kleikamp /* 4994ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4995ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4996ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4997ac27a0ecSDave Kleikamp * the partition.) 4998ac27a0ecSDave Kleikamp */ 49990390131bSFrank Mayhar if (sbi->s_journal) 5000617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 5001ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5002617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 5003ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 5004c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 5005c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 5006c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5007c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5008c5e06d10SJohann Lombardi err = -EROFS; 5009c5e06d10SJohann Lombardi goto restore_opts; 5010c5e06d10SJohann Lombardi } 5011c79d967dSChristoph Hellwig enable_quota = 1; 5012ac27a0ecSDave Kleikamp } 5013ac27a0ecSDave Kleikamp } 5014bfff6873SLukas Czerner 5015bfff6873SLukas Czerner /* 5016bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5017bfff6873SLukas Czerner * current settings 5018bfff6873SLukas Czerner */ 5019bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 5020bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5021bfff6873SLukas Czerner else { 5022bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5023bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5024bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5025bfff6873SLukas Czerner } 5026bfff6873SLukas Czerner 50276fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5028d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 5029e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 50300390131bSFrank Mayhar 5031ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5032ac27a0ecSDave Kleikamp /* Release old quota file names */ 5033a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5034ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 50357c319d32SAditya Kali if (enable_quota) { 50367c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 50370f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 50387c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 50397c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 50407c319d32SAditya Kali err = ext4_enable_quotas(sb); 504107724f98STheodore Ts'o if (err) 50427c319d32SAditya Kali goto restore_opts; 50437c319d32SAditya Kali } 50447c319d32SAditya Kali } 50457c319d32SAditya Kali #endif 5046d4c402d9SCurt Wohlgemuth 5047d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5048d4c402d9SCurt Wohlgemuth kfree(orig_data); 5049ac27a0ecSDave Kleikamp return 0; 50500b8e58a1SAndreas Dilger 5051ac27a0ecSDave Kleikamp restore_opts: 5052ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5053ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5054a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5055ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5056ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5057ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 505830773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 505930773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5060ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5061ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5062a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5063ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5064ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5065ac27a0ecSDave Kleikamp } 5066ac27a0ecSDave Kleikamp #endif 5067d4c402d9SCurt Wohlgemuth kfree(orig_data); 5068ac27a0ecSDave Kleikamp return err; 5069ac27a0ecSDave Kleikamp } 5070ac27a0ecSDave Kleikamp 5071617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5072ac27a0ecSDave Kleikamp { 5073ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5074617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5075617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 507627dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5077960cc398SPekka Enberg u64 fsid; 5078d02a9391SKazuya Mio s64 bfree; 507927dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5080ac27a0ecSDave Kleikamp 5081952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5082952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5083ac27a0ecSDave Kleikamp 5084617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5085ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5086b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 508757042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 508857042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5089d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 509057042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 509127dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 509227dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 509327dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5094ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5095ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 509652d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5097617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5098960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5099960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5100960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5101960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 51020b8e58a1SAndreas Dilger 5103ac27a0ecSDave Kleikamp return 0; 5104ac27a0ecSDave Kleikamp } 5105ac27a0ecSDave Kleikamp 51060b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 51070b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5108ac27a0ecSDave Kleikamp * Process 1 Process 2 5109617ba13bSMingming Cao * ext4_create() quota_sync() 5110dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5111871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5112dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5113ac27a0ecSDave Kleikamp * 5114ac27a0ecSDave Kleikamp */ 5115ac27a0ecSDave Kleikamp 5116ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5117ac27a0ecSDave Kleikamp 5118ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5119ac27a0ecSDave Kleikamp { 51204c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5121ac27a0ecSDave Kleikamp } 5122ac27a0ecSDave Kleikamp 5123617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5124ac27a0ecSDave Kleikamp { 5125ac27a0ecSDave Kleikamp int ret, err; 5126ac27a0ecSDave Kleikamp handle_t *handle; 5127ac27a0ecSDave Kleikamp struct inode *inode; 5128ac27a0ecSDave Kleikamp 5129ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 51309924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5131617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5132ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5133ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5134ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5135617ba13bSMingming Cao err = ext4_journal_stop(handle); 5136ac27a0ecSDave Kleikamp if (!ret) 5137ac27a0ecSDave Kleikamp ret = err; 5138ac27a0ecSDave Kleikamp return ret; 5139ac27a0ecSDave Kleikamp } 5140ac27a0ecSDave Kleikamp 5141617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5142ac27a0ecSDave Kleikamp { 5143ac27a0ecSDave Kleikamp int ret, err; 5144ac27a0ecSDave Kleikamp handle_t *handle; 5145ac27a0ecSDave Kleikamp 51469924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5147617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5148ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5149ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5150ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5151617ba13bSMingming Cao err = ext4_journal_stop(handle); 5152ac27a0ecSDave Kleikamp if (!ret) 5153ac27a0ecSDave Kleikamp ret = err; 5154ac27a0ecSDave Kleikamp return ret; 5155ac27a0ecSDave Kleikamp } 5156ac27a0ecSDave Kleikamp 5157617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5158ac27a0ecSDave Kleikamp { 5159ac27a0ecSDave Kleikamp int ret, err; 5160ac27a0ecSDave Kleikamp handle_t *handle; 5161ac27a0ecSDave Kleikamp 51629924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5163617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 51649c3013e9SJan Kara if (IS_ERR(handle)) { 51659c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 51669c3013e9SJan Kara dquot_release(dquot); 5167ac27a0ecSDave Kleikamp return PTR_ERR(handle); 51689c3013e9SJan Kara } 5169ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5170617ba13bSMingming Cao err = ext4_journal_stop(handle); 5171ac27a0ecSDave Kleikamp if (!ret) 5172ac27a0ecSDave Kleikamp ret = err; 5173ac27a0ecSDave Kleikamp return ret; 5174ac27a0ecSDave Kleikamp } 5175ac27a0ecSDave Kleikamp 5176617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5177ac27a0ecSDave Kleikamp { 5178262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5179262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5180262b4662SJan Kara 51812c8be6b2SJan Kara /* Are we journaling quotas? */ 5182262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 5183262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5184ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5185617ba13bSMingming Cao return ext4_write_dquot(dquot); 5186ac27a0ecSDave Kleikamp } else { 5187ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5188ac27a0ecSDave Kleikamp } 5189ac27a0ecSDave Kleikamp } 5190ac27a0ecSDave Kleikamp 5191617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5192ac27a0ecSDave Kleikamp { 5193ac27a0ecSDave Kleikamp int ret, err; 5194ac27a0ecSDave Kleikamp handle_t *handle; 5195ac27a0ecSDave Kleikamp 5196ac27a0ecSDave Kleikamp /* Data block + inode block */ 51979924a92aSTheodore Ts'o handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); 5198ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5199ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5200ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5201617ba13bSMingming Cao err = ext4_journal_stop(handle); 5202ac27a0ecSDave Kleikamp if (!ret) 5203ac27a0ecSDave Kleikamp ret = err; 5204ac27a0ecSDave Kleikamp return ret; 5205ac27a0ecSDave Kleikamp } 5206ac27a0ecSDave Kleikamp 5207ac27a0ecSDave Kleikamp /* 5208ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5209ac27a0ecSDave Kleikamp * the quota file and such... 5210ac27a0ecSDave Kleikamp */ 5211617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5212ac27a0ecSDave Kleikamp { 5213287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5214617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5215ac27a0ecSDave Kleikamp } 5216ac27a0ecSDave Kleikamp 5217ac27a0ecSDave Kleikamp /* 5218ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5219ac27a0ecSDave Kleikamp */ 5220617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5221f00c9e44SJan Kara struct path *path) 5222ac27a0ecSDave Kleikamp { 5223ac27a0ecSDave Kleikamp int err; 5224ac27a0ecSDave Kleikamp 5225ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5226ac27a0ecSDave Kleikamp return -EINVAL; 52270623543bSJan Kara 5228ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5229d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5230ac27a0ecSDave Kleikamp return -EXDEV; 52310623543bSJan Kara /* Journaling quota? */ 52320623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 52332b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5234f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5235b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5236b31e1552SEric Sandeen "Quota file not on filesystem root. " 5237b31e1552SEric Sandeen "Journaled quota will not work"); 52380623543bSJan Kara } 52390623543bSJan Kara 52400623543bSJan Kara /* 52410623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 52420623543bSJan Kara * all updates to the file when we bypass pagecache... 52430623543bSJan Kara */ 52440390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 5245f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 52460623543bSJan Kara /* 52470623543bSJan Kara * We don't need to lock updates but journal_flush() could 52480623543bSJan Kara * otherwise be livelocked... 52490623543bSJan Kara */ 52500623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 52517ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 52520623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5253f00c9e44SJan Kara if (err) 52547ffe1ea8SHidehiro Kawai return err; 52557ffe1ea8SHidehiro Kawai } 52560623543bSJan Kara 5257f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5258ac27a0ecSDave Kleikamp } 5259ac27a0ecSDave Kleikamp 52607c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 52617c319d32SAditya Kali unsigned int flags) 52627c319d32SAditya Kali { 52637c319d32SAditya Kali int err; 52647c319d32SAditya Kali struct inode *qf_inode; 5265a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52667c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52677c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52687c319d32SAditya Kali }; 52697c319d32SAditya Kali 52707c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 52717c319d32SAditya Kali 52727c319d32SAditya Kali if (!qf_inums[type]) 52737c319d32SAditya Kali return -EPERM; 52747c319d32SAditya Kali 52757c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 52767c319d32SAditya Kali if (IS_ERR(qf_inode)) { 52777c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 52787c319d32SAditya Kali return PTR_ERR(qf_inode); 52797c319d32SAditya Kali } 52807c319d32SAditya Kali 5281bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5282bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 52837c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 52847c319d32SAditya Kali iput(qf_inode); 52857c319d32SAditya Kali 52867c319d32SAditya Kali return err; 52877c319d32SAditya Kali } 52887c319d32SAditya Kali 52897c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 52907c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 52917c319d32SAditya Kali { 52927c319d32SAditya Kali int type, err = 0; 5293a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52947c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52957c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52967c319d32SAditya Kali }; 52977c319d32SAditya Kali 52987c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5299a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 53007c319d32SAditya Kali if (qf_inums[type]) { 53017c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 53027c319d32SAditya Kali DQUOT_USAGE_ENABLED); 53037c319d32SAditya Kali if (err) { 53047c319d32SAditya Kali ext4_warning(sb, 530572ba7450STheodore Ts'o "Failed to enable quota tracking " 530672ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 530772ba7450STheodore Ts'o "e2fsck to fix.", type, err); 53087c319d32SAditya Kali return err; 53097c319d32SAditya Kali } 53107c319d32SAditya Kali } 53117c319d32SAditya Kali } 53127c319d32SAditya Kali return 0; 53137c319d32SAditya Kali } 53147c319d32SAditya Kali 5315ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5316ca0e05e4SDmitry Monakhov { 531721f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 531821f97697SJan Kara handle_t *handle; 531921f97697SJan Kara 532087009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 532187009d86SDmitry Monakhov * Caller already holds s_umount sem */ 532287009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5323ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5324ca0e05e4SDmitry Monakhov 53250b268590SAmir Goldstein if (!inode) 53260b268590SAmir Goldstein goto out; 53270b268590SAmir Goldstein 532821f97697SJan Kara /* Update modification times of quota files when userspace can 532921f97697SJan Kara * start looking at them */ 53309924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 533121f97697SJan Kara if (IS_ERR(handle)) 533221f97697SJan Kara goto out; 533321f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 533421f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 533521f97697SJan Kara ext4_journal_stop(handle); 533621f97697SJan Kara 533721f97697SJan Kara out: 5338ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5339ca0e05e4SDmitry Monakhov } 5340ca0e05e4SDmitry Monakhov 5341ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5342ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5343ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5344ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5345617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5346ac27a0ecSDave Kleikamp size_t len, loff_t off) 5347ac27a0ecSDave Kleikamp { 5348ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5349725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5350ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5351ac27a0ecSDave Kleikamp int tocopy; 5352ac27a0ecSDave Kleikamp size_t toread; 5353ac27a0ecSDave Kleikamp struct buffer_head *bh; 5354ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5355ac27a0ecSDave Kleikamp 5356ac27a0ecSDave Kleikamp if (off > i_size) 5357ac27a0ecSDave Kleikamp return 0; 5358ac27a0ecSDave Kleikamp if (off+len > i_size) 5359ac27a0ecSDave Kleikamp len = i_size-off; 5360ac27a0ecSDave Kleikamp toread = len; 5361ac27a0ecSDave Kleikamp while (toread > 0) { 5362ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5363ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 53641c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 53651c215028STheodore Ts'o if (IS_ERR(bh)) 53661c215028STheodore Ts'o return PTR_ERR(bh); 5367ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5368ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5369ac27a0ecSDave Kleikamp else 5370ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5371ac27a0ecSDave Kleikamp brelse(bh); 5372ac27a0ecSDave Kleikamp offset = 0; 5373ac27a0ecSDave Kleikamp toread -= tocopy; 5374ac27a0ecSDave Kleikamp data += tocopy; 5375ac27a0ecSDave Kleikamp blk++; 5376ac27a0ecSDave Kleikamp } 5377ac27a0ecSDave Kleikamp return len; 5378ac27a0ecSDave Kleikamp } 5379ac27a0ecSDave Kleikamp 5380ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5381ac27a0ecSDave Kleikamp * enough credits) */ 5382617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5383ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5384ac27a0ecSDave Kleikamp { 5385ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5386725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 53871c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5388ac27a0ecSDave Kleikamp struct buffer_head *bh; 5389ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5390ac27a0ecSDave Kleikamp 53910390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5392b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5393b31e1552SEric Sandeen " cancelled because transaction is not started", 53949c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 53959c3013e9SJan Kara return -EIO; 53969c3013e9SJan Kara } 539767eeb568SDmitry Monakhov /* 539867eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 539967eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 540067eeb568SDmitry Monakhov */ 540167eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 540267eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 540367eeb568SDmitry Monakhov " cancelled because not block aligned", 540467eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 540567eeb568SDmitry Monakhov return -EIO; 540667eeb568SDmitry Monakhov } 540767eeb568SDmitry Monakhov 54081c215028STheodore Ts'o bh = ext4_bread(handle, inode, blk, 1); 54091c215028STheodore Ts'o if (IS_ERR(bh)) 54101c215028STheodore Ts'o return PTR_ERR(bh); 5411ac27a0ecSDave Kleikamp if (!bh) 5412ac27a0ecSDave Kleikamp goto out; 54135d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5414617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5415ac27a0ecSDave Kleikamp if (err) { 5416ac27a0ecSDave Kleikamp brelse(bh); 54171c215028STheodore Ts'o return err; 5418ac27a0ecSDave Kleikamp } 5419ac27a0ecSDave Kleikamp lock_buffer(bh); 542067eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5421ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5422ac27a0ecSDave Kleikamp unlock_buffer(bh); 54230390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5424ac27a0ecSDave Kleikamp brelse(bh); 5425ac27a0ecSDave Kleikamp out: 542667eeb568SDmitry Monakhov if (inode->i_size < off + len) { 542767eeb568SDmitry Monakhov i_size_write(inode, off + len); 5428617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5429617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 543021f97697SJan Kara } 543167eeb568SDmitry Monakhov return len; 5432ac27a0ecSDave Kleikamp } 5433ac27a0ecSDave Kleikamp 5434ac27a0ecSDave Kleikamp #endif 5435ac27a0ecSDave Kleikamp 5436152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5437152a0836SAl Viro const char *dev_name, void *data) 5438ac27a0ecSDave Kleikamp { 5439152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5440ac27a0ecSDave Kleikamp } 5441ac27a0ecSDave Kleikamp 544237f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 544324b58424STheodore Ts'o static inline void register_as_ext2(void) 544424b58424STheodore Ts'o { 544524b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 544624b58424STheodore Ts'o if (err) 544724b58424STheodore Ts'o printk(KERN_WARNING 544824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 544924b58424STheodore Ts'o } 545024b58424STheodore Ts'o 545124b58424STheodore Ts'o static inline void unregister_as_ext2(void) 545224b58424STheodore Ts'o { 545324b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 545424b58424STheodore Ts'o } 54552035e776STheodore Ts'o 54562035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 54572035e776STheodore Ts'o { 54582035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 54592035e776STheodore Ts'o return 0; 54602035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54612035e776STheodore Ts'o return 1; 54622035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 54632035e776STheodore Ts'o return 0; 54642035e776STheodore Ts'o return 1; 54652035e776STheodore Ts'o } 546624b58424STheodore Ts'o #else 546724b58424STheodore Ts'o static inline void register_as_ext2(void) { } 546824b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 54692035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 547024b58424STheodore Ts'o #endif 547124b58424STheodore Ts'o 547237f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 547324b58424STheodore Ts'o static inline void register_as_ext3(void) 547424b58424STheodore Ts'o { 547524b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 547624b58424STheodore Ts'o if (err) 547724b58424STheodore Ts'o printk(KERN_WARNING 547824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 547924b58424STheodore Ts'o } 548024b58424STheodore Ts'o 548124b58424STheodore Ts'o static inline void unregister_as_ext3(void) 548224b58424STheodore Ts'o { 548324b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 548424b58424STheodore Ts'o } 54852035e776STheodore Ts'o 54862035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 54872035e776STheodore Ts'o { 54882035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 54892035e776STheodore Ts'o return 0; 54902035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 54912035e776STheodore Ts'o return 0; 54922035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54932035e776STheodore Ts'o return 1; 54942035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 54952035e776STheodore Ts'o return 0; 54962035e776STheodore Ts'o return 1; 54972035e776STheodore Ts'o } 549824b58424STheodore Ts'o #else 549924b58424STheodore Ts'o static inline void register_as_ext3(void) { } 550024b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 55012035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 550224b58424STheodore Ts'o #endif 550324b58424STheodore Ts'o 550403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5505ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 550603010a33STheodore Ts'o .name = "ext4", 5507152a0836SAl Viro .mount = ext4_mount, 5508ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5509ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5510ac27a0ecSDave Kleikamp }; 55117f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5512ac27a0ecSDave Kleikamp 55138f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5514857ac889SLukas Czerner { 5515857ac889SLukas Czerner struct ext4_features *ef; 5516857ac889SLukas Czerner int ret = -ENOMEM; 5517857ac889SLukas Czerner 5518857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5519857ac889SLukas Czerner if (!ef) 5520857ac889SLukas Czerner goto out; 5521857ac889SLukas Czerner 5522857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5523857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5524857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5525857ac889SLukas Czerner "features"); 5526857ac889SLukas Czerner if (ret) { 5527857ac889SLukas Czerner kfree(ef); 5528857ac889SLukas Czerner goto out; 5529857ac889SLukas Czerner } 5530857ac889SLukas Czerner 5531857ac889SLukas Czerner ext4_feat = ef; 5532857ac889SLukas Czerner ret = 0; 5533857ac889SLukas Czerner out: 5534857ac889SLukas Czerner return ret; 5535857ac889SLukas Czerner } 5536857ac889SLukas Czerner 55378f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 55388f021222SLukas Czerner { 55398f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 55408f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 55418f021222SLukas Czerner kfree(ext4_feat); 55428f021222SLukas Czerner } 55438f021222SLukas Czerner 5544e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5545e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5546e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5547e9e3bcecSEric Sandeen 55485dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5549ac27a0ecSDave Kleikamp { 5550e9e3bcecSEric Sandeen int i, err; 5551c9de560dSAlex Tomas 555207c0c5d8SAl Viro ext4_li_info = NULL; 555307c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 555407c0c5d8SAl Viro 55559a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 555612e9b892SDmitry Monakhov ext4_check_flag_values(); 5557e9e3bcecSEric Sandeen 5558e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5559e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5560e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5561e9e3bcecSEric Sandeen } 5562e9e3bcecSEric Sandeen 556351865fdaSZheng Liu err = ext4_init_es(); 55646fd058f7STheodore Ts'o if (err) 55656fd058f7STheodore Ts'o return err; 556651865fdaSZheng Liu 556751865fdaSZheng Liu err = ext4_init_pageio(); 556851865fdaSZheng Liu if (err) 556951865fdaSZheng Liu goto out7; 557051865fdaSZheng Liu 55715dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5572bd2d0210STheodore Ts'o if (err) 5573d44651d0SFabrice Jouhaud goto out6; 55743197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 55750e376b1eSTheodore Ts'o if (!ext4_kset) { 55760e376b1eSTheodore Ts'o err = -ENOMEM; 5577dd68314cSTheodore Ts'o goto out5; 55780e376b1eSTheodore Ts'o } 5579d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5580857ac889SLukas Czerner 5581857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5582dd68314cSTheodore Ts'o if (err) 5583dd68314cSTheodore Ts'o goto out4; 5584857ac889SLukas Czerner 55855dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5586ac27a0ecSDave Kleikamp if (err) 5587c9de560dSAlex Tomas goto out2; 55889c191f70ST Makphaibulchoke else 55899c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5590ac27a0ecSDave Kleikamp err = init_inodecache(); 5591ac27a0ecSDave Kleikamp if (err) 5592ac27a0ecSDave Kleikamp goto out1; 559324b58424STheodore Ts'o register_as_ext3(); 55942035e776STheodore Ts'o register_as_ext2(); 559503010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5596ac27a0ecSDave Kleikamp if (err) 5597ac27a0ecSDave Kleikamp goto out; 5598bfff6873SLukas Czerner 5599ac27a0ecSDave Kleikamp return 0; 5600ac27a0ecSDave Kleikamp out: 560124b58424STheodore Ts'o unregister_as_ext2(); 560224b58424STheodore Ts'o unregister_as_ext3(); 5603ac27a0ecSDave Kleikamp destroy_inodecache(); 5604ac27a0ecSDave Kleikamp out1: 56059c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 56065dabfc78STheodore Ts'o ext4_exit_mballoc(); 56079c191f70ST Makphaibulchoke out2: 56088f021222SLukas Czerner ext4_exit_feat_adverts(); 56096fd058f7STheodore Ts'o out4: 5610d44651d0SFabrice Jouhaud if (ext4_proc_root) 5611dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5612dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5613d44651d0SFabrice Jouhaud out5: 5614dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5615d44651d0SFabrice Jouhaud out6: 56165dabfc78STheodore Ts'o ext4_exit_pageio(); 561751865fdaSZheng Liu out7: 561851865fdaSZheng Liu ext4_exit_es(); 561951865fdaSZheng Liu 5620ac27a0ecSDave Kleikamp return err; 5621ac27a0ecSDave Kleikamp } 5622ac27a0ecSDave Kleikamp 56235dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5624ac27a0ecSDave Kleikamp { 5625bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 562624b58424STheodore Ts'o unregister_as_ext2(); 562724b58424STheodore Ts'o unregister_as_ext3(); 562803010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5629ac27a0ecSDave Kleikamp destroy_inodecache(); 56305dabfc78STheodore Ts'o ext4_exit_mballoc(); 56318f021222SLukas Czerner ext4_exit_feat_adverts(); 56329f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 56333197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 56345dabfc78STheodore Ts'o ext4_exit_system_zone(); 56355dabfc78STheodore Ts'o ext4_exit_pageio(); 5636dd12ed14SEric Sandeen ext4_exit_es(); 5637ac27a0ecSDave Kleikamp } 5638ac27a0ecSDave Kleikamp 5639ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 564083982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5641ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 56425dabfc78STheodore Ts'o module_init(ext4_init_fs) 56435dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5644