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> 24ac27a0ecSDave Kleikamp #include <linux/slab.h> 25ac27a0ecSDave Kleikamp #include <linux/init.h> 26ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2766114cadSTejun Heo #include <linux/backing-dev.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> 373197ebdbSTheodore Ts'o #include <linux/ctype.h> 381330593eSVignesh Babu #include <linux/log2.h> 39717d50e4SAndreas Dilger #include <linux/crc16.h> 407abc52c2SDan Magenheimer #include <linux/cleancache.h> 41ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 42ac27a0ecSDave Kleikamp 43bfff6873SLukas Czerner #include <linux/kthread.h> 44bfff6873SLukas Czerner #include <linux/freezer.h> 45bfff6873SLukas Czerner 463dcf5451SChristoph Hellwig #include "ext4.h" 474a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 483dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 49ac27a0ecSDave Kleikamp #include "xattr.h" 50ac27a0ecSDave Kleikamp #include "acl.h" 513661d286STheodore Ts'o #include "mballoc.h" 52ac27a0ecSDave Kleikamp 539bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 549bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 559bffad1eSTheodore Ts'o 560b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 570b75a840SLukas Czerner static struct mutex ext4_li_mtx; 589c191f70ST Makphaibulchoke static int ext4_mballoc_ready; 59e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 609f6200bbSTheodore Ts'o 61617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 62ac27a0ecSDave Kleikamp unsigned long journal_devnum); 632adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 64e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 65617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 66617ba13bSMingming Cao struct ext4_super_block *es); 67617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 68617ba13bSMingming Cao struct ext4_super_block *es); 69617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 70617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 71617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 72c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 73c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 74152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 75152a0836SAl Viro const char *dev_name, void *data); 762035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 772035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 78d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 79bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 80bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 818f1f7453SEric Sandeen static void ext4_clear_request_list(void); 82ac27a0ecSDave Kleikamp 83c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 842035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 852035e776STheodore Ts'o .owner = THIS_MODULE, 862035e776STheodore Ts'o .name = "ext2", 872035e776STheodore Ts'o .mount = ext4_mount, 882035e776STheodore Ts'o .kill_sb = kill_block_super, 892035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 902035e776STheodore Ts'o }; 917f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 92fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 932035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 942035e776STheodore Ts'o #else 952035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 962035e776STheodore Ts'o #endif 972035e776STheodore Ts'o 982035e776STheodore Ts'o 99ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 100ba69f9abSJan Kara .owner = THIS_MODULE, 101ba69f9abSJan Kara .name = "ext3", 102152a0836SAl Viro .mount = ext4_mount, 103ba69f9abSJan Kara .kill_sb = kill_block_super, 104ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 105ba69f9abSJan Kara }; 1067f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 107fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 108ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 109bd81d8eeSLaurent Vivier 110d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 111d25425f8SDarrick J. Wong struct ext4_super_block *es) 112d25425f8SDarrick J. Wong { 113e2b911c5SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 114d25425f8SDarrick J. Wong return 1; 115d25425f8SDarrick J. Wong 116d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 117d25425f8SDarrick J. Wong } 118d25425f8SDarrick J. Wong 119a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 120a9c47317SDarrick J. Wong struct ext4_super_block *es) 121a9c47317SDarrick J. Wong { 122a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 123a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 124a9c47317SDarrick J. Wong __u32 csum; 125a9c47317SDarrick J. Wong 126a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 127a9c47317SDarrick J. Wong 128a9c47317SDarrick J. Wong return cpu_to_le32(csum); 129a9c47317SDarrick J. Wong } 130a9c47317SDarrick J. Wong 131c197855eSStephen Hemminger static int ext4_superblock_csum_verify(struct super_block *sb, 132a9c47317SDarrick J. Wong struct ext4_super_block *es) 133a9c47317SDarrick J. Wong { 1349aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 135a9c47317SDarrick J. Wong return 1; 136a9c47317SDarrick J. Wong 137a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 138a9c47317SDarrick J. Wong } 139a9c47317SDarrick J. Wong 14006db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 141a9c47317SDarrick J. Wong { 14206db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 14306db49e6STheodore Ts'o 1449aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 145a9c47317SDarrick J. Wong return; 146a9c47317SDarrick J. Wong 147a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 148a9c47317SDarrick J. Wong } 149a9c47317SDarrick J. Wong 1509933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1519933fc0aSTheodore Ts'o { 1529933fc0aSTheodore Ts'o void *ret; 1539933fc0aSTheodore Ts'o 1548be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1559933fc0aSTheodore Ts'o if (!ret) 1569933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1579933fc0aSTheodore Ts'o return ret; 1589933fc0aSTheodore Ts'o } 1599933fc0aSTheodore Ts'o 1609933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1619933fc0aSTheodore Ts'o { 1629933fc0aSTheodore Ts'o void *ret; 1639933fc0aSTheodore Ts'o 1648be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1659933fc0aSTheodore Ts'o if (!ret) 1669933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1679933fc0aSTheodore Ts'o return ret; 1689933fc0aSTheodore Ts'o } 1699933fc0aSTheodore Ts'o 1708fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1718fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 172bd81d8eeSLaurent Vivier { 1733a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1748fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1758fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 176bd81d8eeSLaurent Vivier } 177bd81d8eeSLaurent Vivier 1788fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1798fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 180bd81d8eeSLaurent Vivier { 1815272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1828fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1838fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 184bd81d8eeSLaurent Vivier } 185bd81d8eeSLaurent Vivier 1868fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1878fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 188bd81d8eeSLaurent Vivier { 1895272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1908fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1918fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 192bd81d8eeSLaurent Vivier } 193bd81d8eeSLaurent Vivier 194021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 195560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 196560671a0SAneesh Kumar K.V { 197560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 198560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 199560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 200560671a0SAneesh Kumar K.V } 201560671a0SAneesh Kumar K.V 202560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 203560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 204560671a0SAneesh Kumar K.V { 205560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 206560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 207560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 208560671a0SAneesh Kumar K.V } 209560671a0SAneesh Kumar K.V 210560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 211560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 212560671a0SAneesh Kumar K.V { 213560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 214560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 215560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 216560671a0SAneesh Kumar K.V } 217560671a0SAneesh Kumar K.V 218560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 219560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 220560671a0SAneesh Kumar K.V { 221560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 222560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 223560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 224560671a0SAneesh Kumar K.V } 225560671a0SAneesh Kumar K.V 2268fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2278fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 228bd81d8eeSLaurent Vivier { 2293a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2308fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2318fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 232bd81d8eeSLaurent Vivier } 233bd81d8eeSLaurent Vivier 2348fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2358fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 236bd81d8eeSLaurent Vivier { 2375272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2388fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2398fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 240bd81d8eeSLaurent Vivier } 241bd81d8eeSLaurent Vivier 2428fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2438fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 244bd81d8eeSLaurent Vivier { 2455272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2468fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2478fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 248bd81d8eeSLaurent Vivier } 249bd81d8eeSLaurent Vivier 250021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 251560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 252560671a0SAneesh Kumar K.V { 253560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 254560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 255560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 256560671a0SAneesh Kumar K.V } 257560671a0SAneesh Kumar K.V 258560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 259560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 260560671a0SAneesh Kumar K.V { 261560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 262560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 263560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 264560671a0SAneesh Kumar K.V } 265560671a0SAneesh Kumar K.V 266560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 267560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 268560671a0SAneesh Kumar K.V { 269560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 270560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 271560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 272560671a0SAneesh Kumar K.V } 273560671a0SAneesh Kumar K.V 274560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 275560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 276560671a0SAneesh Kumar K.V { 277560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 278560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 279560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 280560671a0SAneesh Kumar K.V } 281560671a0SAneesh Kumar K.V 282d3d1faf6SCurt Wohlgemuth 2831c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 2841c13d5c0STheodore Ts'o unsigned int line) 2851c13d5c0STheodore Ts'o { 2861c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 2871c13d5c0STheodore Ts'o 2881c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2891b46617bSTheodore Ts'o if (bdev_read_only(sb->s_bdev)) 2901b46617bSTheodore Ts'o return; 2911c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2921c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 2931c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 2941c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 2951c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 2961c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 2971c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 2981c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 2991c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3001c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3011c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3021c13d5c0STheodore Ts'o } 30366e61a9eSTheodore Ts'o /* 30466e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 30566e61a9eSTheodore Ts'o * started already 30666e61a9eSTheodore Ts'o */ 30766e61a9eSTheodore Ts'o if (!es->s_error_count) 30866e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 309ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3101c13d5c0STheodore Ts'o } 3111c13d5c0STheodore Ts'o 3121c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3131c13d5c0STheodore Ts'o unsigned int line) 3141c13d5c0STheodore Ts'o { 3151c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3161c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3171c13d5c0STheodore Ts'o } 3181c13d5c0STheodore Ts'o 319bdfe0cbdSTheodore Ts'o /* 320bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 321bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 322bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 323bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 324bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 325bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 326bdfe0cbdSTheodore Ts'o */ 327bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 328bdfe0cbdSTheodore Ts'o { 329bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 330bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 331bdfe0cbdSTheodore Ts'o 332bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 333bdfe0cbdSTheodore Ts'o } 334bdfe0cbdSTheodore Ts'o 33518aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 33618aadd47SBobi Jam { 33718aadd47SBobi Jam struct super_block *sb = journal->j_private; 33818aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 33918aadd47SBobi Jam int error = is_journal_aborted(journal); 3405d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 34118aadd47SBobi Jam 3425d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 34318aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3445d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3455d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3465d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 34718aadd47SBobi Jam list_del_init(&jce->jce_list); 34818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 34918aadd47SBobi Jam jce->jce_func(sb, jce, error); 35018aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 35118aadd47SBobi Jam } 35218aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 35318aadd47SBobi Jam } 3541c13d5c0STheodore Ts'o 355ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 356ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 357ac27a0ecSDave Kleikamp * 358ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 359617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 360ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 361ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 362ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 363ac27a0ecSDave Kleikamp * write out the superblock safely. 364ac27a0ecSDave Kleikamp * 365dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 366d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 367ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 368ac27a0ecSDave Kleikamp */ 369ac27a0ecSDave Kleikamp 370617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 371ac27a0ecSDave Kleikamp { 372ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 373ac27a0ecSDave Kleikamp return; 374ac27a0ecSDave Kleikamp 375ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 376617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 377ac27a0ecSDave Kleikamp 3784ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 379ac27a0ecSDave Kleikamp if (journal) 380dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 381ac27a0ecSDave Kleikamp } 382ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 383b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 3844418e141SDmitry Monakhov /* 3854418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 3864418e141SDmitry Monakhov * before ->s_flags update 3874418e141SDmitry Monakhov */ 3884418e141SDmitry Monakhov smp_wmb(); 389ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 390ac27a0ecSDave Kleikamp } 3914327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 3924327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 3934327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 3944327ba52SDaeho Jeong return; 395617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 396ac27a0ecSDave Kleikamp sb->s_id); 397ac27a0ecSDave Kleikamp } 3984327ba52SDaeho Jeong } 399ac27a0ecSDave Kleikamp 400efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 401efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 402efbed4dcSTheodore Ts'o "EXT4-fs error") 403efbed4dcSTheodore Ts'o 40412062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 405c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 406ac27a0ecSDave Kleikamp { 4070ff2ea7dSJoe Perches struct va_format vaf; 408ac27a0ecSDave Kleikamp va_list args; 409ac27a0ecSDave Kleikamp 410efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 411ac27a0ecSDave Kleikamp va_start(args, fmt); 4120ff2ea7dSJoe Perches vaf.fmt = fmt; 4130ff2ea7dSJoe Perches vaf.va = &args; 414efbed4dcSTheodore Ts'o printk(KERN_CRIT 415efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4160ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 417ac27a0ecSDave Kleikamp va_end(args); 418efbed4dcSTheodore Ts'o } 419f3fc0210STheodore Ts'o save_error_info(sb, function, line); 420617ba13bSMingming Cao ext4_handle_error(sb); 421ac27a0ecSDave Kleikamp } 422ac27a0ecSDave Kleikamp 423e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 424c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 425273df556SFrank Mayhar const char *fmt, ...) 426273df556SFrank Mayhar { 427273df556SFrank Mayhar va_list args; 428f7c21177STheodore Ts'o struct va_format vaf; 4291c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 430273df556SFrank Mayhar 4311c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4321c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 433efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 434273df556SFrank Mayhar va_start(args, fmt); 435f7c21177STheodore Ts'o vaf.fmt = fmt; 436f7c21177STheodore Ts'o vaf.va = &args; 437c398eda0STheodore Ts'o if (block) 438d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 439d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 440d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 441d9ee81daSJoe Perches block, current->comm, &vaf); 442d9ee81daSJoe Perches else 443d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 444d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 445d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 446d9ee81daSJoe Perches current->comm, &vaf); 447273df556SFrank Mayhar va_end(args); 448efbed4dcSTheodore Ts'o } 449efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 450273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 451273df556SFrank Mayhar } 452273df556SFrank Mayhar 453e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 454f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 455f7c21177STheodore Ts'o const char *fmt, ...) 456273df556SFrank Mayhar { 457273df556SFrank Mayhar va_list args; 458f7c21177STheodore Ts'o struct va_format vaf; 4591c13d5c0STheodore Ts'o struct ext4_super_block *es; 460496ad9aaSAl Viro struct inode *inode = file_inode(file); 461273df556SFrank Mayhar char pathname[80], *path; 462273df556SFrank Mayhar 4631c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4641c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 465efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 4669bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 467f9a62d09SDan Carpenter if (IS_ERR(path)) 468273df556SFrank Mayhar path = "(unknown)"; 469f7c21177STheodore Ts'o va_start(args, fmt); 470f7c21177STheodore Ts'o vaf.fmt = fmt; 471f7c21177STheodore Ts'o vaf.va = &args; 472d9ee81daSJoe Perches if (block) 473d9ee81daSJoe Perches printk(KERN_CRIT 474d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 475d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 476d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 477d9ee81daSJoe Perches block, current->comm, path, &vaf); 478d9ee81daSJoe Perches else 479d9ee81daSJoe Perches printk(KERN_CRIT 480d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 481d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 482d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 483d9ee81daSJoe Perches current->comm, path, &vaf); 484273df556SFrank Mayhar va_end(args); 485efbed4dcSTheodore Ts'o } 486efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 487273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 488273df556SFrank Mayhar } 489273df556SFrank Mayhar 490722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 491ac27a0ecSDave Kleikamp char nbuf[16]) 492ac27a0ecSDave Kleikamp { 493ac27a0ecSDave Kleikamp char *errstr = NULL; 494ac27a0ecSDave Kleikamp 495ac27a0ecSDave Kleikamp switch (errno) { 4966a797d27SDarrick J. Wong case -EFSCORRUPTED: 4976a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 4986a797d27SDarrick J. Wong break; 4996a797d27SDarrick J. Wong case -EFSBADCRC: 5006a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 5016a797d27SDarrick J. Wong break; 502ac27a0ecSDave Kleikamp case -EIO: 503ac27a0ecSDave Kleikamp errstr = "IO failure"; 504ac27a0ecSDave Kleikamp break; 505ac27a0ecSDave Kleikamp case -ENOMEM: 506ac27a0ecSDave Kleikamp errstr = "Out of memory"; 507ac27a0ecSDave Kleikamp break; 508ac27a0ecSDave Kleikamp case -EROFS: 50978f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 51078f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 511ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 512ac27a0ecSDave Kleikamp else 513ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 514ac27a0ecSDave Kleikamp break; 515ac27a0ecSDave Kleikamp default: 516ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 517ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 518ac27a0ecSDave Kleikamp * NULL. */ 519ac27a0ecSDave Kleikamp if (nbuf) { 520ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 521ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 522ac27a0ecSDave Kleikamp errstr = nbuf; 523ac27a0ecSDave Kleikamp } 524ac27a0ecSDave Kleikamp break; 525ac27a0ecSDave Kleikamp } 526ac27a0ecSDave Kleikamp 527ac27a0ecSDave Kleikamp return errstr; 528ac27a0ecSDave Kleikamp } 529ac27a0ecSDave Kleikamp 530617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 531ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 532ac27a0ecSDave Kleikamp 533c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 534c398eda0STheodore Ts'o unsigned int line, int errno) 535ac27a0ecSDave Kleikamp { 536ac27a0ecSDave Kleikamp char nbuf[16]; 537ac27a0ecSDave Kleikamp const char *errstr; 538ac27a0ecSDave Kleikamp 539ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 540ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 541ac27a0ecSDave Kleikamp * an error. */ 542ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 543ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 544ac27a0ecSDave Kleikamp return; 545ac27a0ecSDave Kleikamp 546efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 547617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 548c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 549c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 550efbed4dcSTheodore Ts'o } 551ac27a0ecSDave Kleikamp 552efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 553617ba13bSMingming Cao ext4_handle_error(sb); 554ac27a0ecSDave Kleikamp } 555ac27a0ecSDave Kleikamp 556ac27a0ecSDave Kleikamp /* 557617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 558ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 559ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 560ac27a0ecSDave Kleikamp * 561ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 562ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 563ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 564ac27a0ecSDave Kleikamp */ 565ac27a0ecSDave Kleikamp 566c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 567c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 568ac27a0ecSDave Kleikamp { 569ac27a0ecSDave Kleikamp va_list args; 570ac27a0ecSDave Kleikamp 5711c13d5c0STheodore Ts'o save_error_info(sb, function, line); 572ac27a0ecSDave Kleikamp va_start(args, fmt); 573c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 574c398eda0STheodore Ts'o function, line); 575ac27a0ecSDave Kleikamp vprintk(fmt, args); 576ac27a0ecSDave Kleikamp printk("\n"); 577ac27a0ecSDave Kleikamp va_end(args); 578ac27a0ecSDave Kleikamp 5791c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 580b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 5814ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 5824418e141SDmitry Monakhov /* 5834418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 5844418e141SDmitry Monakhov * before ->s_flags update 5854418e141SDmitry Monakhov */ 5864418e141SDmitry Monakhov smp_wmb(); 5874418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 588ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 589dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5901c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5911c13d5c0STheodore Ts'o } 5924327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 5934327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 5944327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 5954327ba52SDaeho Jeong return; 5961c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 597ac27a0ecSDave Kleikamp } 5984327ba52SDaeho Jeong } 599ac27a0ecSDave Kleikamp 600e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 601e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 602b31e1552SEric Sandeen { 6030ff2ea7dSJoe Perches struct va_format vaf; 604b31e1552SEric Sandeen va_list args; 605b31e1552SEric Sandeen 606efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 607efbed4dcSTheodore Ts'o return; 608efbed4dcSTheodore Ts'o 609b31e1552SEric Sandeen va_start(args, fmt); 6100ff2ea7dSJoe Perches vaf.fmt = fmt; 6110ff2ea7dSJoe Perches vaf.va = &args; 6120ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 613b31e1552SEric Sandeen va_end(args); 614b31e1552SEric Sandeen } 615b31e1552SEric Sandeen 616b03a2f7eSAndreas Dilger #define ext4_warning_ratelimit(sb) \ 617b03a2f7eSAndreas Dilger ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ 618b03a2f7eSAndreas Dilger "EXT4-fs warning") 619b03a2f7eSAndreas Dilger 62012062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 621c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 622ac27a0ecSDave Kleikamp { 6230ff2ea7dSJoe Perches struct va_format vaf; 624ac27a0ecSDave Kleikamp va_list args; 625ac27a0ecSDave Kleikamp 626b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 627efbed4dcSTheodore Ts'o return; 628efbed4dcSTheodore Ts'o 629ac27a0ecSDave Kleikamp va_start(args, fmt); 6300ff2ea7dSJoe Perches vaf.fmt = fmt; 6310ff2ea7dSJoe Perches vaf.va = &args; 6320ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6330ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 634ac27a0ecSDave Kleikamp va_end(args); 635ac27a0ecSDave Kleikamp } 636ac27a0ecSDave Kleikamp 637b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 638b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 639b03a2f7eSAndreas Dilger { 640b03a2f7eSAndreas Dilger struct va_format vaf; 641b03a2f7eSAndreas Dilger va_list args; 642b03a2f7eSAndreas Dilger 643b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 644b03a2f7eSAndreas Dilger return; 645b03a2f7eSAndreas Dilger 646b03a2f7eSAndreas Dilger va_start(args, fmt); 647b03a2f7eSAndreas Dilger vaf.fmt = fmt; 648b03a2f7eSAndreas Dilger vaf.va = &args; 649b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 650b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 651b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 652b03a2f7eSAndreas Dilger va_end(args); 653b03a2f7eSAndreas Dilger } 654b03a2f7eSAndreas Dilger 655e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 656e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 657e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 658e29136f8STheodore Ts'o const char *fmt, ...) 6595d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6605d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6615d1b1b3fSAneesh Kumar K.V { 6620ff2ea7dSJoe Perches struct va_format vaf; 6635d1b1b3fSAneesh Kumar K.V va_list args; 6645d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6655d1b1b3fSAneesh Kumar K.V 6661c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6671c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6681c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6690ff2ea7dSJoe Perches 670efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 6715d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6720ff2ea7dSJoe Perches vaf.fmt = fmt; 6730ff2ea7dSJoe Perches vaf.va = &args; 67421149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 675e29136f8STheodore Ts'o sb->s_id, function, line, grp); 676e29136f8STheodore Ts'o if (ino) 6770ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 678e29136f8STheodore Ts'o if (block) 679efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 680efbed4dcSTheodore Ts'o (unsigned long long) block); 6810ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6825d1b1b3fSAneesh Kumar K.V va_end(args); 683efbed4dcSTheodore Ts'o } 6845d1b1b3fSAneesh Kumar K.V 6855d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 686e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6875d1b1b3fSAneesh Kumar K.V return; 6885d1b1b3fSAneesh Kumar K.V } 6891c13d5c0STheodore Ts'o 6905d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6915d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6925d1b1b3fSAneesh Kumar K.V /* 6935d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6945d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6955d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6965d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6975d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 69825985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 6995d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7005d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7015d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7025d1b1b3fSAneesh Kumar K.V */ 7035d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7045d1b1b3fSAneesh Kumar K.V return; 7055d1b1b3fSAneesh Kumar K.V } 7065d1b1b3fSAneesh Kumar K.V 707617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 708ac27a0ecSDave Kleikamp { 709617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 710ac27a0ecSDave Kleikamp 711617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 712ac27a0ecSDave Kleikamp return; 713ac27a0ecSDave Kleikamp 71412062dddSEric Sandeen ext4_warning(sb, 715ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 716ac27a0ecSDave Kleikamp "running e2fsck is recommended", 717617ba13bSMingming Cao EXT4_DYNAMIC_REV); 718ac27a0ecSDave Kleikamp 719617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 720617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 721617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 722ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 723ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 724ac27a0ecSDave Kleikamp 725ac27a0ecSDave Kleikamp /* 726ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 727ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 728ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 729ac27a0ecSDave Kleikamp */ 730ac27a0ecSDave Kleikamp } 731ac27a0ecSDave Kleikamp 732ac27a0ecSDave Kleikamp /* 733ac27a0ecSDave Kleikamp * Open the external journal device 734ac27a0ecSDave Kleikamp */ 735b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 736ac27a0ecSDave Kleikamp { 737ac27a0ecSDave Kleikamp struct block_device *bdev; 738ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 739ac27a0ecSDave Kleikamp 740d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 741ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 742ac27a0ecSDave Kleikamp goto fail; 743ac27a0ecSDave Kleikamp return bdev; 744ac27a0ecSDave Kleikamp 745ac27a0ecSDave Kleikamp fail: 746b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 747ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 748ac27a0ecSDave Kleikamp return NULL; 749ac27a0ecSDave Kleikamp } 750ac27a0ecSDave Kleikamp 751ac27a0ecSDave Kleikamp /* 752ac27a0ecSDave Kleikamp * Release the journal device 753ac27a0ecSDave Kleikamp */ 7544385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 755ac27a0ecSDave Kleikamp { 7564385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 757ac27a0ecSDave Kleikamp } 758ac27a0ecSDave Kleikamp 7594385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 760ac27a0ecSDave Kleikamp { 761ac27a0ecSDave Kleikamp struct block_device *bdev; 762ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 763ac27a0ecSDave Kleikamp if (bdev) { 7644385bab1SAl Viro ext4_blkdev_put(bdev); 765ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 766ac27a0ecSDave Kleikamp } 767ac27a0ecSDave Kleikamp } 768ac27a0ecSDave Kleikamp 769ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 770ac27a0ecSDave Kleikamp { 771617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 772ac27a0ecSDave Kleikamp } 773ac27a0ecSDave Kleikamp 774617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 775ac27a0ecSDave Kleikamp { 776ac27a0ecSDave Kleikamp struct list_head *l; 777ac27a0ecSDave Kleikamp 778b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 779ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 780ac27a0ecSDave Kleikamp 781ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 782ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 783ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 784ac27a0ecSDave Kleikamp printk(KERN_ERR " " 785ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 786ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 787ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 788ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 789ac27a0ecSDave Kleikamp } 790ac27a0ecSDave Kleikamp } 791ac27a0ecSDave Kleikamp 792617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 793ac27a0ecSDave Kleikamp { 794617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 795617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 796ef2cabf7SHidehiro Kawai int i, err; 797ac27a0ecSDave Kleikamp 798857ac889SLukas Czerner ext4_unregister_li_request(sb); 799e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 800e0ccfd95SChristoph Hellwig 8012e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 8022e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 8034c0425ffSMingming Cao 8040390131bSFrank Mayhar if (sbi->s_journal) { 805ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 80647b4a50bSJan Kara sbi->s_journal = NULL; 807ef2cabf7SHidehiro Kawai if (err < 0) 808c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8090390131bSFrank Mayhar } 810d4edac31SJosef Bacik 811ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 812d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 8139105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 814d4edac31SJosef Bacik ext4_release_system_zone(sb); 815d4edac31SJosef Bacik ext4_mb_release(sb); 816d4edac31SJosef Bacik ext4_ext_release(sb); 817d4edac31SJosef Bacik ext4_xattr_put_super(sb); 818d4edac31SJosef Bacik 819ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 820e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 821ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 822ac27a0ecSDave Kleikamp } 82358c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 824a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 825a8e25a83SArtem Bityutskiy 826ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 827ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 828b93b41d4SAl Viro kvfree(sbi->s_group_desc); 829b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 83057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 831ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 832ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 83357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 834ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 835ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 836a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 837ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 838ac27a0ecSDave Kleikamp #endif 839ac27a0ecSDave Kleikamp 840ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 841ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 842ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 843ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 844ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 845ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 846ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 847ac27a0ecSDave Kleikamp 84889d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 849f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 850ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 851ac27a0ecSDave Kleikamp /* 852ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 853ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 854ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 855ac27a0ecSDave Kleikamp */ 856ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 857f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 858617ba13bSMingming Cao ext4_blkdev_remove(sbi); 859ac27a0ecSDave Kleikamp } 8609c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 8619c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 8629c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 8639c191f70ST Makphaibulchoke } 864c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 865c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 866ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8673197ebdbSTheodore Ts'o /* 8683197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8693197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8703197ebdbSTheodore Ts'o */ 8713197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8723197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 8730441984aSDarrick J. Wong if (sbi->s_chksum_driver) 8740441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 875705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 876ac27a0ecSDave Kleikamp kfree(sbi); 877ac27a0ecSDave Kleikamp } 878ac27a0ecSDave Kleikamp 879e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 880ac27a0ecSDave Kleikamp 881ac27a0ecSDave Kleikamp /* 882ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 883ac27a0ecSDave Kleikamp */ 884617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 885ac27a0ecSDave Kleikamp { 886617ba13bSMingming Cao struct ext4_inode_info *ei; 887ac27a0ecSDave Kleikamp 888e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 889ac27a0ecSDave Kleikamp if (!ei) 890ac27a0ecSDave Kleikamp return NULL; 8910b8e58a1SAndreas Dilger 892ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 893202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 894c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 895c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8969a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 8979a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 898edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 899eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 900edaa53caSZheng Liu ei->i_es_shk_nr = 0; 901dd475925SJan Kara ei->i_es_shrink_lblk = 0; 902d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 903d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 904d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9059d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 9067e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 907d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 908a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 909a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 91096c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 911a9e7f447SDmitry Monakhov #endif 9128aefcd55STheodore Ts'o ei->jinode = NULL; 9132e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 914744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 915b436b9beSJan Kara ei->i_sync_tid = 0; 916b436b9beSJan Kara ei->i_datasync_tid = 0; 917f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 918e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9192e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 920b30ab0e0SMichael Halcrow #ifdef CONFIG_EXT4_FS_ENCRYPTION 921b7236e21STheodore Ts'o ei->i_crypt_info = NULL; 922b30ab0e0SMichael Halcrow #endif 923ac27a0ecSDave Kleikamp return &ei->vfs_inode; 924ac27a0ecSDave Kleikamp } 925ac27a0ecSDave Kleikamp 9267ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9277ff9c073STheodore Ts'o { 9287ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9297ff9c073STheodore Ts'o 9307ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9317ff9c073STheodore Ts'o return drop; 9327ff9c073STheodore Ts'o } 9337ff9c073STheodore Ts'o 934fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 935fa0d7e3dSNick Piggin { 936fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 937fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 938fa0d7e3dSNick Piggin } 939fa0d7e3dSNick Piggin 940617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 941ac27a0ecSDave Kleikamp { 9429f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 943b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 944b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 945b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9469f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9479f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9489f7dd93dSVasily Averin true); 9499f7dd93dSVasily Averin dump_stack(); 9509f7dd93dSVasily Averin } 951fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 952ac27a0ecSDave Kleikamp } 953ac27a0ecSDave Kleikamp 95451cc5068SAlexey Dobriyan static void init_once(void *foo) 955ac27a0ecSDave Kleikamp { 956617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 957ac27a0ecSDave Kleikamp 958ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 959ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9600e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 961ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 962ac27a0ecSDave Kleikamp } 963ac27a0ecSDave Kleikamp 964e67bc2b3SFabian Frederick static int __init init_inodecache(void) 965ac27a0ecSDave Kleikamp { 966617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 967617ba13bSMingming Cao sizeof(struct ext4_inode_info), 968ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 969ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 97020c2df83SPaul Mundt init_once); 971617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 972ac27a0ecSDave Kleikamp return -ENOMEM; 973ac27a0ecSDave Kleikamp return 0; 974ac27a0ecSDave Kleikamp } 975ac27a0ecSDave Kleikamp 976ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 977ac27a0ecSDave Kleikamp { 9788c0a8537SKirill A. Shutemov /* 9798c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 9808c0a8537SKirill A. Shutemov * destroy cache. 9818c0a8537SKirill A. Shutemov */ 9828c0a8537SKirill A. Shutemov rcu_barrier(); 983617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 984ac27a0ecSDave Kleikamp } 985ac27a0ecSDave Kleikamp 9860930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 987ac27a0ecSDave Kleikamp { 9880930fcc1SAl Viro invalidate_inode_buffers(inode); 989dbd5768fSJan Kara clear_inode(inode); 9909f754758SChristoph Hellwig dquot_drop(inode); 991c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 99251865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 9938aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9948aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9958aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9968aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9978aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9988aefcd55STheodore Ts'o } 999b7236e21STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 1000b7236e21STheodore Ts'o if (EXT4_I(inode)->i_crypt_info) 1001c936e1ecSTheodore Ts'o ext4_free_encryption_info(inode, EXT4_I(inode)->i_crypt_info); 1002b7236e21STheodore Ts'o #endif 1003ac27a0ecSDave Kleikamp } 1004ac27a0ecSDave Kleikamp 10051b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10061b961ac0SChristoph Hellwig u64 ino, u32 generation) 1007ac27a0ecSDave Kleikamp { 1008ac27a0ecSDave Kleikamp struct inode *inode; 1009ac27a0ecSDave Kleikamp 1010617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1011ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1012617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1013ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1014ac27a0ecSDave Kleikamp 1015ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1016ac27a0ecSDave Kleikamp * 1017617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1018ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1019ac27a0ecSDave Kleikamp * 1020ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1021ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1022ac27a0ecSDave Kleikamp */ 1023f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 10241d1fe1eeSDavid Howells if (IS_ERR(inode)) 10251d1fe1eeSDavid Howells return ERR_CAST(inode); 10261d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1027ac27a0ecSDave Kleikamp iput(inode); 1028ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1029ac27a0ecSDave Kleikamp } 10301b961ac0SChristoph Hellwig 10311b961ac0SChristoph Hellwig return inode; 1032ac27a0ecSDave Kleikamp } 10331b961ac0SChristoph Hellwig 10341b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10351b961ac0SChristoph Hellwig int fh_len, int fh_type) 10361b961ac0SChristoph Hellwig { 10371b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10381b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10391b961ac0SChristoph Hellwig } 10401b961ac0SChristoph Hellwig 10411b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10421b961ac0SChristoph Hellwig int fh_len, int fh_type) 10431b961ac0SChristoph Hellwig { 10441b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10451b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1046ac27a0ecSDave Kleikamp } 1047ac27a0ecSDave Kleikamp 1048c39a7f84SToshiyuki Okajima /* 1049c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1050c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1051c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1052c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1053c39a7f84SToshiyuki Okajima */ 10540b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10550b8e58a1SAndreas Dilger gfp_t wait) 1056c39a7f84SToshiyuki Okajima { 1057c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1058c39a7f84SToshiyuki Okajima 1059c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1060c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1061c39a7f84SToshiyuki Okajima return 0; 1062c39a7f84SToshiyuki Okajima if (journal) 1063c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1064c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1065c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1066c39a7f84SToshiyuki Okajima } 1067c39a7f84SToshiyuki Okajima 1068ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1069ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1070ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1071ac27a0ecSDave Kleikamp 1072617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1073617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1074617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1075617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1076617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10776f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1078f00c9e44SJan Kara struct path *path); 1079ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1080617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1081617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1082ac27a0ecSDave Kleikamp size_t len, loff_t off); 1083617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1084ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 10857c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 10867c319d32SAditya Kali unsigned int flags); 10877c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1088ac27a0ecSDave Kleikamp 108996c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 109096c7e0d9SJan Kara { 109196c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 109296c7e0d9SJan Kara } 109396c7e0d9SJan Kara 109461e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 109560e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1096617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1097617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1098617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1099617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1100a5b5ee32SJan Kara .write_info = ext4_write_info, 1101a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1102a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1103ac27a0ecSDave Kleikamp }; 1104ac27a0ecSDave Kleikamp 11050d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1106617ba13bSMingming Cao .quota_on = ext4_quota_on, 1107ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1108287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 11090a240339SJan Kara .get_state = dquot_get_state, 1110287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1111287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1112287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1113ac27a0ecSDave Kleikamp }; 1114ac27a0ecSDave Kleikamp #endif 1115ac27a0ecSDave Kleikamp 1116ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1117617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1118617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1119617ba13bSMingming Cao .write_inode = ext4_write_inode, 1120617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11217ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11220930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1123617ba13bSMingming Cao .put_super = ext4_put_super, 1124617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1125c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1126c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1127617ba13bSMingming Cao .statfs = ext4_statfs, 1128617ba13bSMingming Cao .remount_fs = ext4_remount, 1129617ba13bSMingming Cao .show_options = ext4_show_options, 1130ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1131617ba13bSMingming Cao .quota_read = ext4_quota_read, 1132617ba13bSMingming Cao .quota_write = ext4_quota_write, 113396c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1134ac27a0ecSDave Kleikamp #endif 1135c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1136ac27a0ecSDave Kleikamp }; 1137ac27a0ecSDave Kleikamp 113839655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11391b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11401b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1141617ba13bSMingming Cao .get_parent = ext4_get_parent, 1142ac27a0ecSDave Kleikamp }; 1143ac27a0ecSDave Kleikamp 1144ac27a0ecSDave Kleikamp enum { 1145ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1146ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 114772578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1148ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 114972578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1150ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1151ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1152ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 11536ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1154ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11555a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1156ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1157923ae0ffSRoss Zwisler Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_dax, 11581449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 1159a26f4992STheodore Ts'o Opt_lazytime, Opt_nolazytime, 11601449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11615328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1162744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1163fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1164c6d3d56dSDarrick J. Wong Opt_max_dir_size_kb, Opt_nojournal_checksum, 1165ac27a0ecSDave Kleikamp }; 1166ac27a0ecSDave Kleikamp 1167a447c093SSteven Whitehouse static const match_table_t tokens = { 1168ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1169ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1170ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1171ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1172ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1173ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1174ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1175ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1176ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1177ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1178ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1179ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1180ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1181ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 118272578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 118372578c33STheodore Ts'o {Opt_removed, "orlov"}, 1184ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1185ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1186ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1187ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1188e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11895a916be1STheodore Ts'o {Opt_noload, "noload"}, 119072578c33STheodore Ts'o {Opt_removed, "nobh"}, 119172578c33STheodore Ts'o {Opt_removed, "bh"}, 1192ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 119330773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 119430773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1195ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1196ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1197818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1198c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1199818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1200ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1201ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1202ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1203ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12045bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12055bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1206ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1207ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1208ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1209ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1210ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1211ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12125a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1213ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1214ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1215ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1216ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1217ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 121806705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 121906705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 122025ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1221923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1222c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 122364769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1224a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1225a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1226dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 122736ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 122836ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 12296fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12306fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1231240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1232b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1233afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 123406705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 123506705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1236744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1237744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12385328e635SEric Sandeen {Opt_discard, "discard"}, 12395328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1240fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1241fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1242fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1243df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 12446ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1245c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1246c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1247c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1248c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1249c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1250f3f12faaSJosef Bacik {Opt_err, NULL}, 1251ac27a0ecSDave Kleikamp }; 1252ac27a0ecSDave Kleikamp 1253617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1254ac27a0ecSDave Kleikamp { 1255617ba13bSMingming Cao ext4_fsblk_t sb_block; 1256ac27a0ecSDave Kleikamp char *options = (char *) *data; 1257ac27a0ecSDave Kleikamp 1258ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1259ac27a0ecSDave Kleikamp return 1; /* Default location */ 12600b8e58a1SAndreas Dilger 1261ac27a0ecSDave Kleikamp options += 3; 12620b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1263ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1264ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12654776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1266ac27a0ecSDave Kleikamp (char *) *data); 1267ac27a0ecSDave Kleikamp return 1; 1268ac27a0ecSDave Kleikamp } 1269ac27a0ecSDave Kleikamp if (*options == ',') 1270ac27a0ecSDave Kleikamp options++; 1271ac27a0ecSDave Kleikamp *data = (void *) options; 12720b8e58a1SAndreas Dilger 1273ac27a0ecSDave Kleikamp return sb_block; 1274ac27a0ecSDave Kleikamp } 1275ac27a0ecSDave Kleikamp 1276b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1277437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1278437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1279b3881f74STheodore Ts'o 128056c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 128156c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 128256c50f11SDmitry Monakhov { 128356c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 128456c50f11SDmitry Monakhov char *qname; 128503dafb5fSChen Gang int ret = -1; 128656c50f11SDmitry Monakhov 128756c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 128856c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 128956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129056c50f11SDmitry Monakhov "Cannot change journaled " 129156c50f11SDmitry Monakhov "quota options when quota turned on"); 129257f73c2cSTheodore Ts'o return -1; 129356c50f11SDmitry Monakhov } 1294e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1295262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1296262b4662SJan Kara "when QUOTA feature is enabled"); 1297262b4662SJan Kara return -1; 1298262b4662SJan Kara } 129956c50f11SDmitry Monakhov qname = match_strdup(args); 130056c50f11SDmitry Monakhov if (!qname) { 130156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 130256c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 130357f73c2cSTheodore Ts'o return -1; 130456c50f11SDmitry Monakhov } 130503dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 130603dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 130703dafb5fSChen Gang ret = 1; 130803dafb5fSChen Gang else 130956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 131003dafb5fSChen Gang "%s quota file already specified", 131103dafb5fSChen Gang QTYPE2NAME(qtype)); 131203dafb5fSChen Gang goto errout; 131356c50f11SDmitry Monakhov } 131403dafb5fSChen Gang if (strchr(qname, '/')) { 131556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 131656c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 131703dafb5fSChen Gang goto errout; 131856c50f11SDmitry Monakhov } 131903dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1320fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 132156c50f11SDmitry Monakhov return 1; 132203dafb5fSChen Gang errout: 132303dafb5fSChen Gang kfree(qname); 132403dafb5fSChen Gang return ret; 132556c50f11SDmitry Monakhov } 132656c50f11SDmitry Monakhov 132756c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 132856c50f11SDmitry Monakhov { 132956c50f11SDmitry Monakhov 133056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 133156c50f11SDmitry Monakhov 133256c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 133356c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 133456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 133556c50f11SDmitry Monakhov " when quota turned on"); 133657f73c2cSTheodore Ts'o return -1; 133756c50f11SDmitry Monakhov } 133803dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 133956c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 134056c50f11SDmitry Monakhov return 1; 134156c50f11SDmitry Monakhov } 134256c50f11SDmitry Monakhov #endif 134356c50f11SDmitry Monakhov 134426092bf5STheodore Ts'o #define MOPT_SET 0x0001 134526092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 134626092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 134726092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 134826092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 134926092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 135026092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 135126092bf5STheodore Ts'o #define MOPT_Q 0 135226092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 135326092bf5STheodore Ts'o #else 135426092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 135526092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 135626092bf5STheodore Ts'o #endif 135726092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13588dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13598dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13608dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1361ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 136226092bf5STheodore Ts'o 136326092bf5STheodore Ts'o static const struct mount_opts { 136426092bf5STheodore Ts'o int token; 136526092bf5STheodore Ts'o int mount_opt; 136626092bf5STheodore Ts'o int flags; 136726092bf5STheodore Ts'o } ext4_mount_opts[] = { 136826092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 136926092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 137026092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 137126092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 137226092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 137326092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13748dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13758dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13768dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13778dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 137826092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 137926092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13808dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13818dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13828dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 138359d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1384c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1385c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 13868dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1387*1e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 138826092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13898dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 1390*1e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13918dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 139226092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 139326092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 139426092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13958dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13968dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13978dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13988dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 139926092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 140026092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 140126092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 140226092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 140326092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 140426092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 140526092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 140626092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 140726092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 140826092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1409923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 141026092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 14110efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 14120efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 14135ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 14145ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 14155ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 14168dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14178dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14188dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 14198dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 142026092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 142126092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 142226092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 142326092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 142426092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 142526092bf5STheodore Ts'o #else 142626092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 142726092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 142826092bf5STheodore Ts'o #endif 142926092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 143026092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 143126092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 143226092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 143326092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 143426092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 143526092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 143626092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 143726092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 143826092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 143926092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 144026092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 144126092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 144226092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 144326092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 144426092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1445df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 14466ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 144726092bf5STheodore Ts'o {Opt_err, 0, 0} 144826092bf5STheodore Ts'o }; 144926092bf5STheodore Ts'o 145026092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 145126092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 145226092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 145326092bf5STheodore Ts'o { 145426092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 145526092bf5STheodore Ts'o const struct mount_opts *m; 145608cefc7aSEric W. Biederman kuid_t uid; 145708cefc7aSEric W. Biederman kgid_t gid; 145826092bf5STheodore Ts'o int arg = 0; 145926092bf5STheodore Ts'o 146057f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 146157f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 146257f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 146357f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 146457f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 146557f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 146657f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 146757f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 146857f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 146957f73c2cSTheodore Ts'o #endif 147026092bf5STheodore Ts'o switch (token) { 1471f7048605STheodore Ts'o case Opt_noacl: 1472f7048605STheodore Ts'o case Opt_nouser_xattr: 1473f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1474f7048605STheodore Ts'o break; 147526092bf5STheodore Ts'o case Opt_sb: 147626092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 147726092bf5STheodore Ts'o case Opt_removed: 14785f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 147926092bf5STheodore Ts'o return 1; 148026092bf5STheodore Ts'o case Opt_abort: 148126092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 148226092bf5STheodore Ts'o return 1; 148326092bf5STheodore Ts'o case Opt_i_version: 148426092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 148526092bf5STheodore Ts'o return 1; 1486a26f4992STheodore Ts'o case Opt_lazytime: 1487a26f4992STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 1488a26f4992STheodore Ts'o return 1; 1489a26f4992STheodore Ts'o case Opt_nolazytime: 1490a26f4992STheodore Ts'o sb->s_flags &= ~MS_LAZYTIME; 1491a26f4992STheodore Ts'o return 1; 149226092bf5STheodore Ts'o } 149326092bf5STheodore Ts'o 14945f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14955f3633e3SJan Kara if (token == m->token) 14965f3633e3SJan Kara break; 14975f3633e3SJan Kara 14985f3633e3SJan Kara if (m->token == Opt_err) { 14995f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 15005f3633e3SJan Kara "or missing value", opt); 15015f3633e3SJan Kara return -1; 15025f3633e3SJan Kara } 15035f3633e3SJan Kara 15048dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 15058dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 15068dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 15078dc0aa8cSTheodore Ts'o return -1; 15088dc0aa8cSTheodore Ts'o } 15098dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 15108dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 15118dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 15128dc0aa8cSTheodore Ts'o return -1; 15138dc0aa8cSTheodore Ts'o } 15148dc0aa8cSTheodore Ts'o 1515ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 15160efb3b23SJan Kara return -1; 151726092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 151826092bf5STheodore Ts'o return -1; 1519c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1520c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 152126092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 1522*1e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 1523*1e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1524c93cf2d7SDmitry Monakhov } else 1525c93cf2d7SDmitry Monakhov return -1; 1526c93cf2d7SDmitry Monakhov } 152726092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 152826092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 152926092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 153026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 153126092bf5STheodore Ts'o "options when quota turned on"); 153226092bf5STheodore Ts'o return -1; 153326092bf5STheodore Ts'o } 153426092bf5STheodore Ts'o 153526092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 153626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 153726092bf5STheodore Ts'o } else if (token == Opt_commit) { 153826092bf5STheodore Ts'o if (arg == 0) 153926092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 154026092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 154126092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 154226092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 154326092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 154426092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 154526092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1546e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1547e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1548e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1549e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 155026092bf5STheodore Ts'o return -1; 155126092bf5STheodore Ts'o } 155226092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 155326092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 155426092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 155526092bf5STheodore Ts'o if (!args->from) 155626092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 155726092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1558df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1559df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 156026092bf5STheodore Ts'o } else if (token == Opt_stripe) { 156126092bf5STheodore Ts'o sbi->s_stripe = arg; 15620efb3b23SJan Kara } else if (token == Opt_resuid) { 15630efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15640efb3b23SJan Kara if (!uid_valid(uid)) { 15655f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15660efb3b23SJan Kara return -1; 15670efb3b23SJan Kara } 15680efb3b23SJan Kara sbi->s_resuid = uid; 15690efb3b23SJan Kara } else if (token == Opt_resgid) { 15700efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15710efb3b23SJan Kara if (!gid_valid(gid)) { 15725f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15730efb3b23SJan Kara return -1; 15740efb3b23SJan Kara } 15750efb3b23SJan Kara sbi->s_resgid = gid; 15760efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15770efb3b23SJan Kara if (is_remount) { 15780efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15790efb3b23SJan Kara "Cannot specify journal on remount"); 15800efb3b23SJan Kara return -1; 15810efb3b23SJan Kara } 15820efb3b23SJan Kara *journal_devnum = arg; 1583ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1584ad4eec61SEric Sandeen char *journal_path; 1585ad4eec61SEric Sandeen struct inode *journal_inode; 1586ad4eec61SEric Sandeen struct path path; 1587ad4eec61SEric Sandeen int error; 1588ad4eec61SEric Sandeen 1589ad4eec61SEric Sandeen if (is_remount) { 1590ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1591ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1592ad4eec61SEric Sandeen return -1; 1593ad4eec61SEric Sandeen } 1594ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1595ad4eec61SEric Sandeen if (!journal_path) { 1596ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1597ad4eec61SEric Sandeen "journal device string"); 1598ad4eec61SEric Sandeen return -1; 1599ad4eec61SEric Sandeen } 1600ad4eec61SEric Sandeen 1601ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1602ad4eec61SEric Sandeen if (error) { 1603ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1604ad4eec61SEric Sandeen "journal device path: error %d", error); 1605ad4eec61SEric Sandeen kfree(journal_path); 1606ad4eec61SEric Sandeen return -1; 1607ad4eec61SEric Sandeen } 1608ad4eec61SEric Sandeen 16092b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1610ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1611ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1612ad4eec61SEric Sandeen "is not a block device", journal_path); 1613ad4eec61SEric Sandeen path_put(&path); 1614ad4eec61SEric Sandeen kfree(journal_path); 1615ad4eec61SEric Sandeen return -1; 1616ad4eec61SEric Sandeen } 1617ad4eec61SEric Sandeen 1618ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1619ad4eec61SEric Sandeen path_put(&path); 1620ad4eec61SEric Sandeen kfree(journal_path); 16210efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 16220efb3b23SJan Kara if (arg > 7) { 16235f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 16240efb3b23SJan Kara " (must be 0-7)"); 16250efb3b23SJan Kara return -1; 16260efb3b23SJan Kara } 16270efb3b23SJan Kara *journal_ioprio = 16280efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 16296ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 16306ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 16316ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 16326ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 16336ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 16346ddb2447STheodore Ts'o #else 16356ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 16366ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 16376ddb2447STheodore Ts'o #endif 163826092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 163926092bf5STheodore Ts'o if (is_remount) { 164026092bf5STheodore Ts'o if (!sbi->s_journal) 164126092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 16425f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 164326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 164426092bf5STheodore Ts'o "Cannot change data mode on remount"); 164526092bf5STheodore Ts'o return -1; 164626092bf5STheodore Ts'o } 164726092bf5STheodore Ts'o } else { 164826092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 164926092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 165026092bf5STheodore Ts'o } 165126092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 165226092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 165326092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 165426092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16555f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16565f3633e3SJan Kara "quota options when quota turned on"); 165726092bf5STheodore Ts'o return -1; 165826092bf5STheodore Ts'o } 1659e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1660262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1661262b4662SJan Kara "Cannot set journaled quota options " 1662262b4662SJan Kara "when QUOTA feature is enabled"); 1663262b4662SJan Kara return -1; 1664262b4662SJan Kara } 166526092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 166626092bf5STheodore Ts'o #endif 1667923ae0ffSRoss Zwisler #ifndef CONFIG_FS_DAX 1668923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1669923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1670923ae0ffSRoss Zwisler return -1; 1671923ae0ffSRoss Zwisler #endif 167226092bf5STheodore Ts'o } else { 167326092bf5STheodore Ts'o if (!args->from) 167426092bf5STheodore Ts'o arg = 1; 167526092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 167626092bf5STheodore Ts'o arg = !arg; 167726092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 167826092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 167926092bf5STheodore Ts'o "buggy handling of option %s", opt); 168026092bf5STheodore Ts'o WARN_ON(1); 168126092bf5STheodore Ts'o return -1; 168226092bf5STheodore Ts'o } 168326092bf5STheodore Ts'o if (arg != 0) 168426092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 168526092bf5STheodore Ts'o else 168626092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 168726092bf5STheodore Ts'o } 168826092bf5STheodore Ts'o return 1; 168926092bf5STheodore Ts'o } 169026092bf5STheodore Ts'o 1691ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1692c3191067STheodore Ts'o unsigned long *journal_devnum, 1693b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1694661aa520SEric Sandeen int is_remount) 1695ac27a0ecSDave Kleikamp { 1696617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1697ac27a0ecSDave Kleikamp char *p; 1698ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 169926092bf5STheodore Ts'o int token; 1700ac27a0ecSDave Kleikamp 1701ac27a0ecSDave Kleikamp if (!options) 1702ac27a0ecSDave Kleikamp return 1; 1703ac27a0ecSDave Kleikamp 1704ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1705ac27a0ecSDave Kleikamp if (!*p) 1706ac27a0ecSDave Kleikamp continue; 170715121c18SEric Sandeen /* 170815121c18SEric Sandeen * Initialize args struct so we know whether arg was 170915121c18SEric Sandeen * found; some options take optional arguments. 171015121c18SEric Sandeen */ 1711caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1712ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 171326092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 171426092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1715ac27a0ecSDave Kleikamp return 0; 1716ac27a0ecSDave Kleikamp } 1717ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1718e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && 1719262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1720262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1721262b4662SJan Kara "feature is enabled"); 1722262b4662SJan Kara return 0; 1723262b4662SJan Kara } 1724ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1725482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1726fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1727ac27a0ecSDave Kleikamp 1728482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1729fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1730ac27a0ecSDave Kleikamp 173156c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1732b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1733b31e1552SEric Sandeen "format mixing"); 1734ac27a0ecSDave Kleikamp return 0; 1735ac27a0ecSDave Kleikamp } 1736ac27a0ecSDave Kleikamp 1737ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1738b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1739b31e1552SEric Sandeen "not specified"); 1740ac27a0ecSDave Kleikamp return 0; 1741ac27a0ecSDave Kleikamp } 1742ac27a0ecSDave Kleikamp } 1743ac27a0ecSDave Kleikamp #endif 1744261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1745261cb20cSJan Kara int blocksize = 1746261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1747261cb20cSJan Kara 1748261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1749261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1750261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1751261cb20cSJan Kara return 0; 1752261cb20cSJan Kara } 1753261cb20cSJan Kara } 1754d4f76107SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 1755d4f76107SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 1756d4f76107SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " 1757d4f76107SJan Kara "in data=ordered mode"); 1758d4f76107SJan Kara return 0; 1759d4f76107SJan Kara } 1760ac27a0ecSDave Kleikamp return 1; 1761ac27a0ecSDave Kleikamp } 1762ac27a0ecSDave Kleikamp 17632adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17642adf6da8STheodore Ts'o struct super_block *sb) 17652adf6da8STheodore Ts'o { 17662adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17672adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17682adf6da8STheodore Ts'o 17692adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17702adf6da8STheodore Ts'o char *fmtname = ""; 17712adf6da8STheodore Ts'o 17722adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17732adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17742adf6da8STheodore Ts'o fmtname = "vfsold"; 17752adf6da8STheodore Ts'o break; 17762adf6da8STheodore Ts'o case QFMT_VFS_V0: 17772adf6da8STheodore Ts'o fmtname = "vfsv0"; 17782adf6da8STheodore Ts'o break; 17792adf6da8STheodore Ts'o case QFMT_VFS_V1: 17802adf6da8STheodore Ts'o fmtname = "vfsv1"; 17812adf6da8STheodore Ts'o break; 17822adf6da8STheodore Ts'o } 17832adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17842adf6da8STheodore Ts'o } 17852adf6da8STheodore Ts'o 17862adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 1787a068acf2SKees Cook seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); 17882adf6da8STheodore Ts'o 17892adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 1790a068acf2SKees Cook seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); 17912adf6da8STheodore Ts'o #endif 17922adf6da8STheodore Ts'o } 17932adf6da8STheodore Ts'o 17945a916be1STheodore Ts'o static const char *token2str(int token) 17955a916be1STheodore Ts'o { 179650df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17975a916be1STheodore Ts'o 17985a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17995a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 18005a916be1STheodore Ts'o break; 18015a916be1STheodore Ts'o return t->pattern; 18025a916be1STheodore Ts'o } 18035a916be1STheodore Ts'o 18042adf6da8STheodore Ts'o /* 18052adf6da8STheodore Ts'o * Show an option if 18062adf6da8STheodore Ts'o * - it's set to a non-default value OR 18072adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 18082adf6da8STheodore Ts'o */ 180966acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 181066acdcf4STheodore Ts'o int nodefs) 18112adf6da8STheodore Ts'o { 18122adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 18132adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 181466acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 18155a916be1STheodore Ts'o const struct mount_opts *m; 181666acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 18172adf6da8STheodore Ts'o 181866acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 181966acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 18202adf6da8STheodore Ts'o 18212adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 18225a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 18235a916be1STheodore Ts'o 18245a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 18255a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 18265a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 18275a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 18285a916be1STheodore Ts'o continue; 182966acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 18305a916be1STheodore Ts'o continue; /* skip if same as the default */ 18315a916be1STheodore Ts'o if ((want_set && 18325a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 18335a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 18345a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 18355a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 18365a916be1STheodore Ts'o } 18375a916be1STheodore Ts'o 183808cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 18395a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 184008cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 184108cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 184208cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 18435a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 184408cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 184508cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 184666acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 18475a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18485a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18492adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18505a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18512adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18525a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 185366acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18545a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 185566acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18565a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 185766acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18585a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18592adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18605a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 186166acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18625a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 186366acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18642adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18655a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18662adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18675a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18682adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18695a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18705a916be1STheodore Ts'o } 187166acdcf4STheodore Ts'o if (nodefs || 187266acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18735a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18742adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18752adf6da8STheodore Ts'o 187666acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 187766acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18785a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1879df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1880df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18812adf6da8STheodore Ts'o 18822adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18832adf6da8STheodore Ts'o return 0; 18842adf6da8STheodore Ts'o } 18852adf6da8STheodore Ts'o 188666acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 188766acdcf4STheodore Ts'o { 188866acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 188966acdcf4STheodore Ts'o } 189066acdcf4STheodore Ts'o 1891ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 189266acdcf4STheodore Ts'o { 189366acdcf4STheodore Ts'o struct super_block *sb = seq->private; 189466acdcf4STheodore Ts'o int rc; 189566acdcf4STheodore Ts'o 189666acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 189766acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 189866acdcf4STheodore Ts'o seq_puts(seq, "\n"); 189966acdcf4STheodore Ts'o return rc; 190066acdcf4STheodore Ts'o } 190166acdcf4STheodore Ts'o 1902617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1903ac27a0ecSDave Kleikamp int read_only) 1904ac27a0ecSDave Kleikamp { 1905617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1906ac27a0ecSDave Kleikamp int res = 0; 1907ac27a0ecSDave Kleikamp 1908617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1909b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1910b31e1552SEric Sandeen "forcing read-only mode"); 1911ac27a0ecSDave Kleikamp res = MS_RDONLY; 1912ac27a0ecSDave Kleikamp } 1913ac27a0ecSDave Kleikamp if (read_only) 1914281b5995STheodore Ts'o goto done; 1915617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1916b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1917b31e1552SEric Sandeen "running e2fsck is recommended"); 1918c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 1919b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1920b31e1552SEric Sandeen "warning: mounting fs with errors, " 1921b31e1552SEric Sandeen "running e2fsck is recommended"); 1922ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1923ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1924ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1925b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1926b31e1552SEric Sandeen "warning: maximal mount count reached, " 1927b31e1552SEric Sandeen "running e2fsck is recommended"); 1928ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1929ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1930ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1931b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1932b31e1552SEric Sandeen "warning: checktime reached, " 1933b31e1552SEric Sandeen "running e2fsck is recommended"); 19340390131bSFrank Mayhar if (!sbi->s_journal) 1935216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1936ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1937617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1938e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1939ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1940617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19410390131bSFrank Mayhar if (sbi->s_journal) 1942e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 1943ac27a0ecSDave Kleikamp 1944e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1945281b5995STheodore Ts'o done: 1946ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1947a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1948a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1949ac27a0ecSDave Kleikamp sb->s_blocksize, 1950ac27a0ecSDave Kleikamp sbi->s_groups_count, 1951617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1952617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1953a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1954ac27a0ecSDave Kleikamp 19557abc52c2SDan Magenheimer cleancache_init_fs(sb); 1956ac27a0ecSDave Kleikamp return res; 1957ac27a0ecSDave Kleikamp } 1958ac27a0ecSDave Kleikamp 1959117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1960117fff10STheodore Ts'o { 1961117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1962117fff10STheodore Ts'o struct flex_groups *new_groups; 1963117fff10STheodore Ts'o int size; 1964117fff10STheodore Ts'o 1965117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1966117fff10STheodore Ts'o return 0; 1967117fff10STheodore Ts'o 1968117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1969117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1970117fff10STheodore Ts'o return 0; 1971117fff10STheodore Ts'o 1972117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1973117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1974117fff10STheodore Ts'o if (!new_groups) { 1975117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1976117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1977117fff10STheodore Ts'o return -ENOMEM; 1978117fff10STheodore Ts'o } 1979117fff10STheodore Ts'o 1980117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1981117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1982117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1983117fff10STheodore Ts'o sizeof(struct flex_groups))); 1984b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 1985117fff10STheodore Ts'o } 1986117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1987117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1988117fff10STheodore Ts'o return 0; 1989117fff10STheodore Ts'o } 1990117fff10STheodore Ts'o 1991772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1992772cb7c8SJose R. Santos { 1993772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1994772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1995772cb7c8SJose R. Santos ext4_group_t flex_group; 1996117fff10STheodore Ts'o int i, err; 1997772cb7c8SJose R. Santos 1998503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1999d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2000772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2001772cb7c8SJose R. Santos return 1; 2002772cb7c8SJose R. Santos } 2003772cb7c8SJose R. Santos 2004117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2005117fff10STheodore Ts'o if (err) 2006772cb7c8SJose R. Santos goto failed; 2007772cb7c8SJose R. Santos 2008772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 200988b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2010772cb7c8SJose R. Santos 2011772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 20127ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 20137ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 201490ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 201524aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 20167ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 20177ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2018772cb7c8SJose R. Santos } 2019772cb7c8SJose R. Santos 2020772cb7c8SJose R. Santos return 1; 2021772cb7c8SJose R. Santos failed: 2022772cb7c8SJose R. Santos return 0; 2023772cb7c8SJose R. Santos } 2024772cb7c8SJose R. Santos 2025e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2026717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2027717d50e4SAndreas Dilger { 2028feb0ab32SDarrick J. Wong int offset; 2029717d50e4SAndreas Dilger __u16 crc = 0; 2030717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2031e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2032717d50e4SAndreas Dilger 20339aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2034feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2035d6a77105STheodore Ts'o __le16 save_csum; 2036feb0ab32SDarrick J. Wong __u32 csum32; 2037feb0ab32SDarrick J. Wong 2038d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 2039feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 2040feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2041feb0ab32SDarrick J. Wong sizeof(le_group)); 2042feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2043feb0ab32SDarrick J. Wong sbi->s_desc_size); 2044d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 2045feb0ab32SDarrick J. Wong 2046feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2047feb0ab32SDarrick J. Wong goto out; 2048feb0ab32SDarrick J. Wong } 2049feb0ab32SDarrick J. Wong 2050feb0ab32SDarrick J. Wong /* old crc16 code */ 2051e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2052813d32f9SDarrick J. Wong return 0; 2053813d32f9SDarrick J. Wong 2054feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2055feb0ab32SDarrick J. Wong 2056717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2057717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2058717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2059717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2060717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2061e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2062717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2063717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2064717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2065717d50e4SAndreas Dilger offset); 2066717d50e4SAndreas Dilger 2067feb0ab32SDarrick J. Wong out: 2068717d50e4SAndreas Dilger return cpu_to_le16(crc); 2069717d50e4SAndreas Dilger } 2070717d50e4SAndreas Dilger 2071feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2072717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2073717d50e4SAndreas Dilger { 2074feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2075e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2076717d50e4SAndreas Dilger return 0; 2077717d50e4SAndreas Dilger 2078717d50e4SAndreas Dilger return 1; 2079717d50e4SAndreas Dilger } 2080717d50e4SAndreas Dilger 2081feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2082feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2083feb0ab32SDarrick J. Wong { 2084feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2085feb0ab32SDarrick J. Wong return; 2086e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2087feb0ab32SDarrick J. Wong } 2088feb0ab32SDarrick J. Wong 2089ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2090bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2091bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2092ac27a0ecSDave Kleikamp { 2093617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2094617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2095617ba13bSMingming Cao ext4_fsblk_t last_block; 2096bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2097bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2098bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2099ce421581SJose R. Santos int flexbg_flag = 0; 2100bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2101ac27a0ecSDave Kleikamp 2102e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2103ce421581SJose R. Santos flexbg_flag = 1; 2104ce421581SJose R. Santos 2105617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2106ac27a0ecSDave Kleikamp 2107197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2108197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2109197cd65aSAkinobu Mita 2110ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2111bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2112ac27a0ecSDave Kleikamp else 2113ac27a0ecSDave Kleikamp last_block = first_block + 2114617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2115ac27a0ecSDave Kleikamp 2116bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2117bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2118bfff6873SLukas Czerner grp = i; 2119bfff6873SLukas Czerner 21208fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 21212b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2122b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2123a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2124b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2125ac27a0ecSDave Kleikamp return 0; 2126ac27a0ecSDave Kleikamp } 21278fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 21282b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2129b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2130a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2131b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2132ac27a0ecSDave Kleikamp return 0; 2133ac27a0ecSDave Kleikamp } 21348fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2135bd81d8eeSLaurent Vivier if (inode_table < first_block || 21362b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2137b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2138a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2139b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2140ac27a0ecSDave Kleikamp return 0; 2141ac27a0ecSDave Kleikamp } 2142955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2143feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2144b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2145b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2146e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2147fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21487ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2149955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2150717d50e4SAndreas Dilger return 0; 2151717d50e4SAndreas Dilger } 21527ee1ec4cSLi Zefan } 2153955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2154ce421581SJose R. Santos if (!flexbg_flag) 2155617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2156ac27a0ecSDave Kleikamp } 2157bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2158bfff6873SLukas Czerner *first_not_zeroed = grp; 2159ac27a0ecSDave Kleikamp return 1; 2160ac27a0ecSDave Kleikamp } 2161ac27a0ecSDave Kleikamp 2162617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2163ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2164ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2165ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2166ac27a0ecSDave Kleikamp * 2167ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2168ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2169ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2170ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2171ac27a0ecSDave Kleikamp * 2172ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2173ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2174ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2175617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2176ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2177ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2178ac27a0ecSDave Kleikamp */ 2179617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2180617ba13bSMingming Cao struct ext4_super_block *es) 2181ac27a0ecSDave Kleikamp { 2182ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2183ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2184ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2185ac27a0ecSDave Kleikamp int i; 2186ac27a0ecSDave Kleikamp #endif 2187ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2188ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2189ac27a0ecSDave Kleikamp return; 2190ac27a0ecSDave Kleikamp } 2191ac27a0ecSDave Kleikamp 2192a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2193b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2194b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2195a8f48a95SEric Sandeen return; 2196a8f48a95SEric Sandeen } 2197a8f48a95SEric Sandeen 2198d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2199d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2200d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2201d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2202d39195c3SAmir Goldstein return; 2203d39195c3SAmir Goldstein } 2204d39195c3SAmir Goldstein 2205617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2206c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2207c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 220884474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2209ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2210ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2211c25f9bc6SEric Sandeen } 2212ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2213ac27a0ecSDave Kleikamp return; 2214ac27a0ecSDave Kleikamp } 2215ac27a0ecSDave Kleikamp 2216ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2217b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2218ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2219ac27a0ecSDave Kleikamp } 2220ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2221ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2222ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2223ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2224a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2225617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2226617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2227ac27a0ecSDave Kleikamp if (ret < 0) 2228b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2229b31e1552SEric Sandeen "Cannot turn on journaled " 2230b31e1552SEric Sandeen "quota: error %d", ret); 2231ac27a0ecSDave Kleikamp } 2232ac27a0ecSDave Kleikamp } 2233ac27a0ecSDave Kleikamp #endif 2234ac27a0ecSDave Kleikamp 2235ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2236ac27a0ecSDave Kleikamp struct inode *inode; 2237ac27a0ecSDave Kleikamp 223897bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 223997bd42b9SJosef Bacik if (IS_ERR(inode)) { 2240ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2241ac27a0ecSDave Kleikamp break; 2242ac27a0ecSDave Kleikamp } 2243ac27a0ecSDave Kleikamp 2244617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2245871a2931SChristoph Hellwig dquot_initialize(inode); 2246ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2247566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2248b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2249b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 225046e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2251e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2252ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2253721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 225455f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2255617ba13bSMingming Cao ext4_truncate(inode); 2256721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2257ac27a0ecSDave Kleikamp nr_truncates++; 2258ac27a0ecSDave Kleikamp } else { 2259566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2260b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2261b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 226246e665e9SHarvey Harrison __func__, inode->i_ino); 2263ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2264ac27a0ecSDave Kleikamp inode->i_ino); 2265ac27a0ecSDave Kleikamp nr_orphans++; 2266ac27a0ecSDave Kleikamp } 2267ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2268ac27a0ecSDave Kleikamp } 2269ac27a0ecSDave Kleikamp 2270ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2271ac27a0ecSDave Kleikamp 2272ac27a0ecSDave Kleikamp if (nr_orphans) 2273b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2274b31e1552SEric Sandeen PLURAL(nr_orphans)); 2275ac27a0ecSDave Kleikamp if (nr_truncates) 2276b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2277b31e1552SEric Sandeen PLURAL(nr_truncates)); 2278ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2279ac27a0ecSDave Kleikamp /* Turn quotas off */ 2280a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2281ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2282287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2283ac27a0ecSDave Kleikamp } 2284ac27a0ecSDave Kleikamp #endif 2285ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2286ac27a0ecSDave Kleikamp } 22870b8e58a1SAndreas Dilger 2288cd2291a4SEric Sandeen /* 2289cd2291a4SEric Sandeen * Maximal extent format file size. 2290cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2291cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2292cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2293cd2291a4SEric Sandeen * so that won't be a limiting factor. 2294cd2291a4SEric Sandeen * 2295f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2296f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2297f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2298f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2299f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2300f17722f9SLukas Czerner * 2301cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2302cd2291a4SEric Sandeen */ 2303f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2304cd2291a4SEric Sandeen { 2305cd2291a4SEric Sandeen loff_t res; 2306cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2307cd2291a4SEric Sandeen 2308cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2309f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2310cd2291a4SEric Sandeen /* 231190c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2312cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2313cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2314cd2291a4SEric Sandeen */ 2315cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2316cd2291a4SEric Sandeen 2317cd2291a4SEric Sandeen /* total blocks in file system block size */ 2318cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2319cd2291a4SEric Sandeen upper_limit <<= blkbits; 2320cd2291a4SEric Sandeen } 2321cd2291a4SEric Sandeen 2322f17722f9SLukas Czerner /* 2323f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2324f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2325f17722f9SLukas Czerner * size 2326f17722f9SLukas Czerner */ 2327f17722f9SLukas Czerner res = (1LL << 32) - 1; 2328cd2291a4SEric Sandeen res <<= blkbits; 2329cd2291a4SEric Sandeen 2330cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2331cd2291a4SEric Sandeen if (res > upper_limit) 2332cd2291a4SEric Sandeen res = upper_limit; 2333cd2291a4SEric Sandeen 2334cd2291a4SEric Sandeen return res; 2335cd2291a4SEric Sandeen } 2336ac27a0ecSDave Kleikamp 2337ac27a0ecSDave Kleikamp /* 2338cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23390fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23400fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2341ac27a0ecSDave Kleikamp */ 2342f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2343ac27a0ecSDave Kleikamp { 2344617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23450fc1b451SAneesh Kumar K.V int meta_blocks; 23460fc1b451SAneesh Kumar K.V loff_t upper_limit; 23470b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23480b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23490b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23500b8e58a1SAndreas Dilger * 23510b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23520b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23530fc1b451SAneesh Kumar K.V */ 23540fc1b451SAneesh Kumar K.V 2355f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23560fc1b451SAneesh Kumar K.V /* 235790c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23580b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23590b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23600fc1b451SAneesh Kumar K.V */ 23610fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23620fc1b451SAneesh Kumar K.V 23630fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23640fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23650fc1b451SAneesh Kumar K.V 23660fc1b451SAneesh Kumar K.V } else { 23678180a562SAneesh Kumar K.V /* 23688180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23698180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23708180a562SAneesh Kumar K.V * represent total number of blocks in 23718180a562SAneesh Kumar K.V * file system block size 23728180a562SAneesh Kumar K.V */ 23730fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23740fc1b451SAneesh Kumar K.V 23750fc1b451SAneesh Kumar K.V } 23760fc1b451SAneesh Kumar K.V 23770fc1b451SAneesh Kumar K.V /* indirect blocks */ 23780fc1b451SAneesh Kumar K.V meta_blocks = 1; 23790fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23800fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23810fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23820fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23830fc1b451SAneesh Kumar K.V 23840fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23850fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2386ac27a0ecSDave Kleikamp 2387ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2388ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2389ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2390ac27a0ecSDave Kleikamp res <<= bits; 2391ac27a0ecSDave Kleikamp if (res > upper_limit) 2392ac27a0ecSDave Kleikamp res = upper_limit; 23930fc1b451SAneesh Kumar K.V 23940fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23950fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23960fc1b451SAneesh Kumar K.V 2397ac27a0ecSDave Kleikamp return res; 2398ac27a0ecSDave Kleikamp } 2399ac27a0ecSDave Kleikamp 2400617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 240170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2402ac27a0ecSDave Kleikamp { 2403617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2404fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2405ac27a0ecSDave Kleikamp int has_super = 0; 2406ac27a0ecSDave Kleikamp 2407ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2408ac27a0ecSDave Kleikamp 2409e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 241070bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2411ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2412617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2413ac27a0ecSDave Kleikamp has_super = 1; 24140b8e58a1SAndreas Dilger 2415bd63f6b0SDarrick J. Wong /* 2416bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2417bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2418bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2419bd63f6b0SDarrick J. Wong * compensate. 2420bd63f6b0SDarrick J. Wong */ 2421bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2422bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2423bd63f6b0SDarrick J. Wong has_super++; 2424bd63f6b0SDarrick J. Wong 2425617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2426ac27a0ecSDave Kleikamp } 2427ac27a0ecSDave Kleikamp 2428c9de560dSAlex Tomas /** 2429c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2430c9de560dSAlex Tomas * @sbi: In memory super block info 2431c9de560dSAlex Tomas * 2432c9de560dSAlex Tomas * If we have specified it via mount option, then 2433c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2434c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2435c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2436c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2437c9de560dSAlex Tomas * 2438c9de560dSAlex Tomas */ 2439c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2440c9de560dSAlex Tomas { 2441c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2442c9de560dSAlex Tomas unsigned long stripe_width = 2443c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24443eb08658SDan Ehrenberg int ret; 2445c9de560dSAlex Tomas 2446c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24473eb08658SDan Ehrenberg ret = sbi->s_stripe; 24483eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24493eb08658SDan Ehrenberg ret = stripe_width; 24503eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24513eb08658SDan Ehrenberg ret = stride; 24523eb08658SDan Ehrenberg else 24533eb08658SDan Ehrenberg ret = 0; 2454c9de560dSAlex Tomas 24553eb08658SDan Ehrenberg /* 24563eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24573eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24583eb08658SDan Ehrenberg */ 24593eb08658SDan Ehrenberg if (ret <= 1) 24603eb08658SDan Ehrenberg ret = 0; 2461c9de560dSAlex Tomas 24623eb08658SDan Ehrenberg return ret; 2463c9de560dSAlex Tomas } 2464ac27a0ecSDave Kleikamp 2465a13fb1a4SEric Sandeen /* 2466a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2467a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2468a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2469a13fb1a4SEric Sandeen * 0 if it cannot be. 2470a13fb1a4SEric Sandeen */ 2471a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2472a13fb1a4SEric Sandeen { 2473e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2474a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2475a13fb1a4SEric Sandeen "Couldn't mount because of " 2476a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2477a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2478a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2479a13fb1a4SEric Sandeen return 0; 2480a13fb1a4SEric Sandeen } 2481a13fb1a4SEric Sandeen 2482a13fb1a4SEric Sandeen if (readonly) 2483a13fb1a4SEric Sandeen return 1; 2484a13fb1a4SEric Sandeen 2485e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 24862cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 24872cb5cc8bSDarrick J. Wong sb->s_flags |= MS_RDONLY; 24882cb5cc8bSDarrick J. Wong return 1; 24892cb5cc8bSDarrick J. Wong } 24902cb5cc8bSDarrick J. Wong 2491a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2492e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2493a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2494a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2495a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2496a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2497a13fb1a4SEric Sandeen return 0; 2498a13fb1a4SEric Sandeen } 2499a13fb1a4SEric Sandeen /* 2500a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2501a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2502a13fb1a4SEric Sandeen */ 2503e2b911c5SDarrick J. Wong if (ext4_has_feature_huge_file(sb)) { 2504a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2505a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2506a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2507a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2508a13fb1a4SEric Sandeen return 0; 2509a13fb1a4SEric Sandeen } 2510a13fb1a4SEric Sandeen } 2511e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2512bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2513bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2514bab08ab9STheodore Ts'o "extents feature\n"); 2515bab08ab9STheodore Ts'o return 0; 2516bab08ab9STheodore Ts'o } 25177c319d32SAditya Kali 25187c319d32SAditya Kali #ifndef CONFIG_QUOTA 2519e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 25207c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 25217c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 25227c319d32SAditya Kali "without CONFIG_QUOTA"); 25237c319d32SAditya Kali return 0; 25247c319d32SAditya Kali } 25257c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2526a13fb1a4SEric Sandeen return 1; 2527a13fb1a4SEric Sandeen } 2528a13fb1a4SEric Sandeen 252966e61a9eSTheodore Ts'o /* 253066e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 253166e61a9eSTheodore Ts'o * on the file system 253266e61a9eSTheodore Ts'o */ 253366e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 253466e61a9eSTheodore Ts'o { 253566e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 253666e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 253766e61a9eSTheodore Ts'o struct ext4_super_block *es; 253866e61a9eSTheodore Ts'o 253966e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 254066e61a9eSTheodore Ts'o es = sbi->s_es; 254166e61a9eSTheodore Ts'o 254266e61a9eSTheodore Ts'o if (es->s_error_count) 2543ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2544ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 254566e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 254666e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2547ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 254866e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 254966e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 255066e61a9eSTheodore Ts'o es->s_first_error_func, 255166e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 255266e61a9eSTheodore Ts'o if (es->s_first_error_ino) 255366e61a9eSTheodore Ts'o printk(": inode %u", 255466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 255566e61a9eSTheodore Ts'o if (es->s_first_error_block) 255666e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 255766e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 255866e61a9eSTheodore Ts'o printk("\n"); 255966e61a9eSTheodore Ts'o } 256066e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2561ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 256266e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 256366e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 256466e61a9eSTheodore Ts'o es->s_last_error_func, 256566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 256666e61a9eSTheodore Ts'o if (es->s_last_error_ino) 256766e61a9eSTheodore Ts'o printk(": inode %u", 256866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 256966e61a9eSTheodore Ts'o if (es->s_last_error_block) 257066e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 257166e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 257266e61a9eSTheodore Ts'o printk("\n"); 257366e61a9eSTheodore Ts'o } 257466e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 257566e61a9eSTheodore Ts'o } 257666e61a9eSTheodore Ts'o 2577bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2578bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2579bfff6873SLukas Czerner { 2580bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2581bfff6873SLukas Czerner ext4_group_t group, ngroups; 2582bfff6873SLukas Czerner struct super_block *sb; 2583bfff6873SLukas Czerner unsigned long timeout = 0; 2584bfff6873SLukas Czerner int ret = 0; 2585bfff6873SLukas Czerner 2586bfff6873SLukas Czerner sb = elr->lr_super; 2587bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2588bfff6873SLukas Czerner 25898e8ad8a5SJan Kara sb_start_write(sb); 2590bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2591bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2592bfff6873SLukas Czerner if (!gdp) { 2593bfff6873SLukas Czerner ret = 1; 2594bfff6873SLukas Czerner break; 2595bfff6873SLukas Czerner } 2596bfff6873SLukas Czerner 2597bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2598bfff6873SLukas Czerner break; 2599bfff6873SLukas Czerner } 2600bfff6873SLukas Czerner 26017f511862STheodore Ts'o if (group >= ngroups) 2602bfff6873SLukas Czerner ret = 1; 2603bfff6873SLukas Czerner 2604bfff6873SLukas Czerner if (!ret) { 2605bfff6873SLukas Czerner timeout = jiffies; 2606bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2607bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2608bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 260951ce6511SLukas Czerner timeout = (jiffies - timeout) * 261051ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2611bfff6873SLukas Czerner elr->lr_timeout = timeout; 2612bfff6873SLukas Czerner } 2613bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2614bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2615bfff6873SLukas Czerner } 26168e8ad8a5SJan Kara sb_end_write(sb); 2617bfff6873SLukas Czerner 2618bfff6873SLukas Czerner return ret; 2619bfff6873SLukas Czerner } 2620bfff6873SLukas Czerner 2621bfff6873SLukas Czerner /* 2622bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 26234ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2624bfff6873SLukas Czerner */ 2625bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2626bfff6873SLukas Czerner { 2627bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2628bfff6873SLukas Czerner 2629bfff6873SLukas Czerner if (!elr) 2630bfff6873SLukas Czerner return; 2631bfff6873SLukas Czerner 2632bfff6873SLukas Czerner sbi = elr->lr_sbi; 2633bfff6873SLukas Czerner 2634bfff6873SLukas Czerner list_del(&elr->lr_request); 2635bfff6873SLukas Czerner sbi->s_li_request = NULL; 2636bfff6873SLukas Czerner kfree(elr); 2637bfff6873SLukas Czerner } 2638bfff6873SLukas Czerner 2639bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2640bfff6873SLukas Czerner { 26411bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 26421bb933fbSLukas Czerner if (!ext4_li_info) { 26431bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2644bfff6873SLukas Czerner return; 26451bb933fbSLukas Czerner } 2646bfff6873SLukas Czerner 2647bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 26481bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2649bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 26501bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2651bfff6873SLukas Czerner } 2652bfff6873SLukas Czerner 26538f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 26548f1f7453SEric Sandeen 2655bfff6873SLukas Czerner /* 2656bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2657bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2658bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2659bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2660bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2661bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2662bfff6873SLukas Czerner * next waking time and put itself into sleep. 2663bfff6873SLukas Czerner */ 2664bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2665bfff6873SLukas Czerner { 2666bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2667bfff6873SLukas Czerner struct list_head *pos, *n; 2668bfff6873SLukas Czerner struct ext4_li_request *elr; 26694ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2670bfff6873SLukas Czerner 2671bfff6873SLukas Czerner BUG_ON(NULL == eli); 2672bfff6873SLukas Czerner 2673bfff6873SLukas Czerner cont_thread: 2674bfff6873SLukas Czerner while (true) { 2675bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2676bfff6873SLukas Czerner 2677bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2678bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2679bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2680bfff6873SLukas Czerner goto exit_thread; 2681bfff6873SLukas Czerner } 2682bfff6873SLukas Czerner 2683bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2684bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2685bfff6873SLukas Czerner lr_request); 2686bfff6873SLukas Czerner 2687b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2688b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2689b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2690bfff6873SLukas Czerner ext4_remove_li_request(elr); 2691bfff6873SLukas Czerner continue; 2692bfff6873SLukas Czerner } 2693b2c78cd0STheodore Ts'o } 2694bfff6873SLukas Czerner 2695bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2696bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2697bfff6873SLukas Czerner } 2698bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2699bfff6873SLukas Czerner 2700a0acae0eSTejun Heo try_to_freeze(); 2701bfff6873SLukas Czerner 27024ed5c033SLukas Czerner cur = jiffies; 27034ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2704f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2705bfff6873SLukas Czerner cond_resched(); 2706bfff6873SLukas Czerner continue; 2707bfff6873SLukas Czerner } 2708bfff6873SLukas Czerner 27094ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 27104ed5c033SLukas Czerner 27118f1f7453SEric Sandeen if (kthread_should_stop()) { 27128f1f7453SEric Sandeen ext4_clear_request_list(); 27138f1f7453SEric Sandeen goto exit_thread; 27148f1f7453SEric Sandeen } 2715bfff6873SLukas Czerner } 2716bfff6873SLukas Czerner 2717bfff6873SLukas Czerner exit_thread: 2718bfff6873SLukas Czerner /* 2719bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2720bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2721bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2722bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2723bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2724bfff6873SLukas Czerner * new one. 2725bfff6873SLukas Czerner */ 2726bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2727bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2728bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2729bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2730bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2731bfff6873SLukas Czerner goto cont_thread; 2732bfff6873SLukas Czerner } 2733bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2734bfff6873SLukas Czerner kfree(ext4_li_info); 2735bfff6873SLukas Czerner ext4_li_info = NULL; 2736bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2737bfff6873SLukas Czerner 2738bfff6873SLukas Czerner return 0; 2739bfff6873SLukas Czerner } 2740bfff6873SLukas Czerner 2741bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2742bfff6873SLukas Czerner { 2743bfff6873SLukas Czerner struct list_head *pos, *n; 2744bfff6873SLukas Czerner struct ext4_li_request *elr; 2745bfff6873SLukas Czerner 2746bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2747bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2748bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2749bfff6873SLukas Czerner lr_request); 2750bfff6873SLukas Czerner ext4_remove_li_request(elr); 2751bfff6873SLukas Czerner } 2752bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2753bfff6873SLukas Czerner } 2754bfff6873SLukas Czerner 2755bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2756bfff6873SLukas Czerner { 27578f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 27588f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 27598f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 27608f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2761bfff6873SLukas Czerner ext4_clear_request_list(); 2762bfff6873SLukas Czerner kfree(ext4_li_info); 2763bfff6873SLukas Czerner ext4_li_info = NULL; 276492b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2765bfff6873SLukas Czerner "initialization thread\n", 2766bfff6873SLukas Czerner err); 2767bfff6873SLukas Czerner return err; 2768bfff6873SLukas Czerner } 2769bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2770bfff6873SLukas Czerner return 0; 2771bfff6873SLukas Czerner } 2772bfff6873SLukas Czerner 2773bfff6873SLukas Czerner /* 2774bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2775bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2776bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2777bfff6873SLukas Czerner * groups and return total number of groups. 2778bfff6873SLukas Czerner */ 2779bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2780bfff6873SLukas Czerner { 2781bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2782bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2783bfff6873SLukas Czerner 2784bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2785bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2786bfff6873SLukas Czerner if (!gdp) 2787bfff6873SLukas Czerner continue; 2788bfff6873SLukas Czerner 2789bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2790bfff6873SLukas Czerner break; 2791bfff6873SLukas Czerner } 2792bfff6873SLukas Czerner 2793bfff6873SLukas Czerner return group; 2794bfff6873SLukas Czerner } 2795bfff6873SLukas Czerner 2796bfff6873SLukas Czerner static int ext4_li_info_new(void) 2797bfff6873SLukas Czerner { 2798bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2799bfff6873SLukas Czerner 2800bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2801bfff6873SLukas Czerner if (!eli) 2802bfff6873SLukas Czerner return -ENOMEM; 2803bfff6873SLukas Czerner 2804bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2805bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2806bfff6873SLukas Czerner 2807bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2808bfff6873SLukas Czerner 2809bfff6873SLukas Czerner ext4_li_info = eli; 2810bfff6873SLukas Czerner 2811bfff6873SLukas Czerner return 0; 2812bfff6873SLukas Czerner } 2813bfff6873SLukas Czerner 2814bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2815bfff6873SLukas Czerner ext4_group_t start) 2816bfff6873SLukas Czerner { 2817bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2818bfff6873SLukas Czerner struct ext4_li_request *elr; 2819bfff6873SLukas Czerner 2820bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2821bfff6873SLukas Czerner if (!elr) 2822bfff6873SLukas Czerner return NULL; 2823bfff6873SLukas Czerner 2824bfff6873SLukas Czerner elr->lr_super = sb; 2825bfff6873SLukas Czerner elr->lr_sbi = sbi; 2826bfff6873SLukas Czerner elr->lr_next_group = start; 2827bfff6873SLukas Czerner 2828bfff6873SLukas Czerner /* 2829bfff6873SLukas Czerner * Randomize first schedule time of the request to 2830bfff6873SLukas Czerner * spread the inode table initialization requests 2831bfff6873SLukas Czerner * better. 2832bfff6873SLukas Czerner */ 2833dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 2834dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 2835bfff6873SLukas Czerner return elr; 2836bfff6873SLukas Czerner } 2837bfff6873SLukas Czerner 28387f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 2839bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2840bfff6873SLukas Czerner { 2841bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 28427f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 2843bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 28446c5a6cb9SAndrew Morton int ret = 0; 2845bfff6873SLukas Czerner 28467f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 284751ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 284851ce6511SLukas Czerner /* 284951ce6511SLukas Czerner * Reset timeout so it can be computed again, because 285051ce6511SLukas Czerner * s_li_wait_mult might have changed. 285151ce6511SLukas Czerner */ 285251ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 28537f511862STheodore Ts'o goto out; 285451ce6511SLukas Czerner } 2855bfff6873SLukas Czerner 2856bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2857bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 285855ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 28597f511862STheodore Ts'o goto out; 2860bfff6873SLukas Czerner 2861bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 28627f511862STheodore Ts'o if (!elr) { 28637f511862STheodore Ts'o ret = -ENOMEM; 28647f511862STheodore Ts'o goto out; 28657f511862STheodore Ts'o } 2866bfff6873SLukas Czerner 2867bfff6873SLukas Czerner if (NULL == ext4_li_info) { 2868bfff6873SLukas Czerner ret = ext4_li_info_new(); 2869bfff6873SLukas Czerner if (ret) 2870bfff6873SLukas Czerner goto out; 2871bfff6873SLukas Czerner } 2872bfff6873SLukas Czerner 2873bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2874bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 2875bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2876bfff6873SLukas Czerner 2877bfff6873SLukas Czerner sbi->s_li_request = elr; 287846e4690bSTao Ma /* 287946e4690bSTao Ma * set elr to NULL here since it has been inserted to 288046e4690bSTao Ma * the request_list and the removal and free of it is 288146e4690bSTao Ma * handled by ext4_clear_request_list from now on. 288246e4690bSTao Ma */ 288346e4690bSTao Ma elr = NULL; 2884bfff6873SLukas Czerner 2885bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 2886bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 2887bfff6873SLukas Czerner if (ret) 2888bfff6873SLukas Czerner goto out; 2889bfff6873SLukas Czerner } 2890bfff6873SLukas Czerner out: 2891bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2892beed5ecbSNicolas Kaiser if (ret) 2893bfff6873SLukas Czerner kfree(elr); 2894bfff6873SLukas Czerner return ret; 2895bfff6873SLukas Czerner } 2896bfff6873SLukas Czerner 2897bfff6873SLukas Czerner /* 2898bfff6873SLukas Czerner * We do not need to lock anything since this is called on 2899bfff6873SLukas Czerner * module unload. 2900bfff6873SLukas Czerner */ 2901bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 2902bfff6873SLukas Czerner { 2903bfff6873SLukas Czerner /* 2904bfff6873SLukas Czerner * If thread exited earlier 2905bfff6873SLukas Czerner * there's nothing to be done. 2906bfff6873SLukas Czerner */ 29078f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 2908bfff6873SLukas Czerner return; 2909bfff6873SLukas Czerner 29108f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 2911bfff6873SLukas Czerner } 2912bfff6873SLukas Czerner 291325ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 291425ed6e8aSDarrick J. Wong { 291525ed6e8aSDarrick J. Wong int ret = 1; 291625ed6e8aSDarrick J. Wong int compat, incompat; 291725ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 291825ed6e8aSDarrick J. Wong 29199aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 2920db9ee220SDarrick J. Wong /* journal checksum v3 */ 292125ed6e8aSDarrick J. Wong compat = 0; 2922db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 292325ed6e8aSDarrick J. Wong } else { 292425ed6e8aSDarrick J. Wong /* journal checksum v1 */ 292525ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 292625ed6e8aSDarrick J. Wong incompat = 0; 292725ed6e8aSDarrick J. Wong } 292825ed6e8aSDarrick J. Wong 2929feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 2930feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2931feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 2932feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 293325ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 293425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 293525ed6e8aSDarrick J. Wong compat, 0, 293625ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 293725ed6e8aSDarrick J. Wong incompat); 293825ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 293925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 294025ed6e8aSDarrick J. Wong compat, 0, 294125ed6e8aSDarrick J. Wong incompat); 294225ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 294325ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 294425ed6e8aSDarrick J. Wong } else { 2945feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2946feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 294725ed6e8aSDarrick J. Wong } 294825ed6e8aSDarrick J. Wong 294925ed6e8aSDarrick J. Wong return ret; 295025ed6e8aSDarrick J. Wong } 295125ed6e8aSDarrick J. Wong 2952952fc18eSTheodore Ts'o /* 2953952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 2954952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 2955952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 2956952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 2957952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 2958952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 2959952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 2960952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 2961952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 2962952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 2963952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 2964952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 2965952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 2966952fc18eSTheodore Ts'o */ 2967952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 2968952fc18eSTheodore Ts'o char *buf) 2969952fc18eSTheodore Ts'o { 2970952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 2971952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 2972952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 2973952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 2974952fc18eSTheodore Ts'o int s, j, count = 0; 2975952fc18eSTheodore Ts'o 2976e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 29770548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 29780548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 29790548bbb8STheodore Ts'o 2980952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 2981952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 2982952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 2983952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 2984952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2985952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 2986952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 2987952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 2988952fc18eSTheodore Ts'o count++; 2989952fc18eSTheodore Ts'o } 2990952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 2991952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 2992952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 2993952fc18eSTheodore Ts'o count++; 2994952fc18eSTheodore Ts'o } 2995952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 2996952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 2997952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 2998952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 2999952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3000952fc18eSTheodore Ts'o count++; 3001952fc18eSTheodore Ts'o } 3002952fc18eSTheodore Ts'o if (i != grp) 3003952fc18eSTheodore Ts'o continue; 3004952fc18eSTheodore Ts'o s = 0; 3005952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3006952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3007952fc18eSTheodore Ts'o count++; 3008952fc18eSTheodore Ts'o } 3009952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3010952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3011952fc18eSTheodore Ts'o count++; 3012952fc18eSTheodore Ts'o } 3013952fc18eSTheodore Ts'o } 3014952fc18eSTheodore Ts'o if (!count) 3015952fc18eSTheodore Ts'o return 0; 3016952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3017952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3018952fc18eSTheodore Ts'o } 3019952fc18eSTheodore Ts'o 3020952fc18eSTheodore Ts'o /* 3021952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3022952fc18eSTheodore Ts'o */ 3023952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3024952fc18eSTheodore Ts'o { 3025952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3026952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3027952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3028952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 30294fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3030952fc18eSTheodore Ts'o 3031952fc18eSTheodore Ts'o if (!buf) 3032952fc18eSTheodore Ts'o return -ENOMEM; 3033952fc18eSTheodore Ts'o 3034952fc18eSTheodore Ts'o /* 3035952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3036952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3037952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3038952fc18eSTheodore Ts'o */ 3039952fc18eSTheodore Ts'o 3040952fc18eSTheodore Ts'o /* 3041952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3042952fc18eSTheodore Ts'o */ 3043952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3044952fc18eSTheodore Ts'o 3045952fc18eSTheodore Ts'o /* 3046952fc18eSTheodore Ts'o * Add the overhead found in each block group 3047952fc18eSTheodore Ts'o */ 3048952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3049952fc18eSTheodore Ts'o int blks; 3050952fc18eSTheodore Ts'o 3051952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3052952fc18eSTheodore Ts'o overhead += blks; 3053952fc18eSTheodore Ts'o if (blks) 3054952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3055952fc18eSTheodore Ts'o cond_resched(); 3056952fc18eSTheodore Ts'o } 3057b003b524SEric Sandeen /* Add the internal journal blocks as well */ 3058b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3059810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 30600875a2b4SEric Sandeen 3061952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3062952fc18eSTheodore Ts'o smp_wmb(); 3063952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3064952fc18eSTheodore Ts'o return 0; 3065952fc18eSTheodore Ts'o } 3066952fc18eSTheodore Ts'o 3067b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 306827dd4385SLukas Czerner { 306927dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3070b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 307127dd4385SLukas Czerner 307227dd4385SLukas Czerner /* 307330fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 307430fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 307530fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 307630fac0f7SJan Kara * to keep ext2/3 backward compatibility. 307730fac0f7SJan Kara */ 3078e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3079b5799018STheodore Ts'o return; 308030fac0f7SJan Kara /* 308127dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 308227dd4385SLukas Czerner * This should cover the situations where we can not afford to run 308327dd4385SLukas Czerner * out of space like for example punch hole, or converting 3084556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 308527dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 308627dd4385SLukas Czerner * very rare. 308727dd4385SLukas Czerner */ 3088b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3089b5799018STheodore Ts'o sbi->s_cluster_bits); 309027dd4385SLukas Czerner 309127dd4385SLukas Czerner do_div(resv_clusters, 50); 309227dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 309327dd4385SLukas Czerner 3094b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 309527dd4385SLukas Czerner } 309627dd4385SLukas Czerner 3097617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3098ac27a0ecSDave Kleikamp { 3099d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3100ac27a0ecSDave Kleikamp struct buffer_head *bh; 3101617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3102617ba13bSMingming Cao struct ext4_sb_info *sbi; 3103617ba13bSMingming Cao ext4_fsblk_t block; 3104617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 310570bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3106ac27a0ecSDave Kleikamp unsigned long offset = 0; 3107ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3108ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3109ac27a0ecSDave Kleikamp struct inode *root; 31100390131bSFrank Mayhar const char *descr; 3111dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3112281b5995STheodore Ts'o int blocksize, clustersize; 31134ec11028STheodore Ts'o unsigned int db_count; 31144ec11028STheodore Ts'o unsigned int i; 3115281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3116bd81d8eeSLaurent Vivier __u64 blocks_count; 311707aa2ea1SLukas Czerner int err = 0; 3118b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3119bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3120ac27a0ecSDave Kleikamp 3121ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3122ac27a0ecSDave Kleikamp if (!sbi) 3123dcc7dae3SCyrill Gorcunov goto out_free_orig; 3124705895b6SPekka Enberg 3125705895b6SPekka Enberg sbi->s_blockgroup_lock = 3126705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3127705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3128705895b6SPekka Enberg kfree(sbi); 3129dcc7dae3SCyrill Gorcunov goto out_free_orig; 3130705895b6SPekka Enberg } 3131ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 31322c0544b2STheodore Ts'o sbi->s_sb = sb; 3133240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3134d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3135f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3136f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3137f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3138ac27a0ecSDave Kleikamp 31399f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3140ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 31419f6200bbSTheodore Ts'o 314207aa2ea1SLukas Czerner /* -EINVAL is default */ 3143dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3144617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3145ac27a0ecSDave Kleikamp if (!blocksize) { 3146b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3147ac27a0ecSDave Kleikamp goto out_fail; 3148ac27a0ecSDave Kleikamp } 3149ac27a0ecSDave Kleikamp 3150ac27a0ecSDave Kleikamp /* 3151617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3152ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3153ac27a0ecSDave Kleikamp */ 3154617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 315570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 315670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3157ac27a0ecSDave Kleikamp } else { 315870bbb3e0SAndrew Morton logical_sb_block = sb_block; 3159ac27a0ecSDave Kleikamp } 3160ac27a0ecSDave Kleikamp 3161a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3162b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3163ac27a0ecSDave Kleikamp goto out_fail; 3164ac27a0ecSDave Kleikamp } 3165ac27a0ecSDave Kleikamp /* 3166ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3167617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3168ac27a0ecSDave Kleikamp */ 31692716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3170ac27a0ecSDave Kleikamp sbi->s_es = es; 3171ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3172617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3173617ba13bSMingming Cao goto cantfind_ext4; 3174afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3175ac27a0ecSDave Kleikamp 3176feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3177e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3178e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3179363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3180feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3181feb0ab32SDarrick J. Wong 3182d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3183d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3184d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3185d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3186d25425f8SDarrick J. Wong silent = 1; 3187d25425f8SDarrick J. Wong goto cantfind_ext4; 3188d25425f8SDarrick J. Wong } 3189d25425f8SDarrick J. Wong 31900441984aSDarrick J. Wong /* Load the checksum driver */ 3191e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb)) { 31920441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 31930441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 31940441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 31950441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 31960441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 31970441984aSDarrick J. Wong goto failed_mount; 31980441984aSDarrick J. Wong } 31990441984aSDarrick J. Wong } 32000441984aSDarrick J. Wong 3201a9c47317SDarrick J. Wong /* Check superblock checksum */ 3202a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3203a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3204a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3205a9c47317SDarrick J. Wong silent = 1; 32066a797d27SDarrick J. Wong ret = -EFSBADCRC; 3207a9c47317SDarrick J. Wong goto cantfind_ext4; 3208a9c47317SDarrick J. Wong } 3209a9c47317SDarrick J. Wong 3210a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3211e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 32128c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 32138c81bd8fSDarrick J. Wong else if (ext4_has_metadata_csum(sb)) 3214a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3215a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3216a9c47317SDarrick J. Wong 3217ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3218ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3219fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3220617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3221fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 322287f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3223fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3224617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3225fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3226ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3227fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 322803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3229fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 32302e7842b8SHugh Dickins #endif 323198c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 323298c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 323398c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 323498c1a759SDarrick J. Wong 3235617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3236fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3237617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3238fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3239617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3240fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3241ac27a0ecSDave Kleikamp 3242617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3243fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3244bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3245fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3246bb4f397aSAneesh Kumar K.V else 3247fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 324845f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3249fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 32508b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3251fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3252ac27a0ecSDave Kleikamp 325308cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 325408cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 325530773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 325630773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 325730773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3258ac27a0ecSDave Kleikamp 32598b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3260fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3261ac27a0ecSDave Kleikamp 32621e2462f9SMingming Cao /* 3263dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3264dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3265dd919b98SAneesh Kumar K.V */ 3266bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 32678b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3268fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3269dd919b98SAneesh Kumar K.V 327051ce6511SLukas Czerner /* 327151ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 327251ce6511SLukas Czerner * no mount option specified. 327351ce6511SLukas Czerner */ 327451ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 327551ce6511SLukas Czerner 32768b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3277661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 32788b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 32798b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 32808b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 32818b67f04aSTheodore Ts'o } 32825a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3283b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3284661aa520SEric Sandeen &journal_ioprio, 0)) 3285ac27a0ecSDave Kleikamp goto failed_mount; 3286ac27a0ecSDave Kleikamp 328756889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 328856889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 328956889787STheodore Ts'o "with data=journal disables delayed " 329056889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 329156889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 329256889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 329356889787STheodore Ts'o "both data=journal and delalloc"); 329456889787STheodore Ts'o goto failed_mount; 329556889787STheodore Ts'o } 329656889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 329756889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 32986ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 329956889787STheodore Ts'o goto failed_mount; 330056889787STheodore Ts'o } 3301923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3302923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3303923ae0ffSRoss Zwisler "both data=journal and dax"); 3304923ae0ffSRoss Zwisler goto failed_mount; 3305923ae0ffSRoss Zwisler } 330656889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 330756889787STheodore Ts'o clear_opt(sb, DELALLOC); 3308001e4a87STejun Heo } else { 3309001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 331056889787STheodore Ts'o } 331156889787STheodore Ts'o 3312ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3313482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3314ac27a0ecSDave Kleikamp 3315617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3316e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3317e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3318e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3319b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3320b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3321b31e1552SEric Sandeen "running e2fsck is recommended"); 3322469108ffSTheodore Tso 3323ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3324ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3325e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3326ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3327ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3328ed3654ebSTheodore Ts'o goto failed_mount; 3329ed3654ebSTheodore Ts'o } 3330ed3654ebSTheodore Ts'o } 3331ed3654ebSTheodore Ts'o 33322035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 33332035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 33342035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 33352035e776STheodore Ts'o "using the ext4 subsystem"); 33362035e776STheodore Ts'o else { 33372035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 33382035e776STheodore Ts'o "to feature incompatibilities"); 33392035e776STheodore Ts'o goto failed_mount; 33402035e776STheodore Ts'o } 33412035e776STheodore Ts'o } 33422035e776STheodore Ts'o 33432035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 33442035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 33452035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 33462035e776STheodore Ts'o "using the ext4 subsystem"); 33472035e776STheodore Ts'o else { 33482035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 33492035e776STheodore Ts'o "to feature incompatibilities"); 33502035e776STheodore Ts'o goto failed_mount; 33512035e776STheodore Ts'o } 33522035e776STheodore Ts'o } 33532035e776STheodore Ts'o 3354469108ffSTheodore Tso /* 3355ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3356ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3357ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3358ac27a0ecSDave Kleikamp */ 3359a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3360ac27a0ecSDave Kleikamp goto failed_mount; 3361a13fb1a4SEric Sandeen 3362261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3363617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3364617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3365b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3366b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3367ac27a0ecSDave Kleikamp goto failed_mount; 3368ac27a0ecSDave Kleikamp } 3369ac27a0ecSDave Kleikamp 3370923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 3371923ae0ffSRoss Zwisler if (blocksize != PAGE_SIZE) { 3372923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, 3373923ae0ffSRoss Zwisler "error: unsupported blocksize for dax"); 3374923ae0ffSRoss Zwisler goto failed_mount; 3375923ae0ffSRoss Zwisler } 3376923ae0ffSRoss Zwisler if (!sb->s_bdev->bd_disk->fops->direct_access) { 3377923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, 3378923ae0ffSRoss Zwisler "error: device does not support dax"); 3379923ae0ffSRoss Zwisler goto failed_mount; 3380923ae0ffSRoss Zwisler } 3381923ae0ffSRoss Zwisler } 3382923ae0ffSRoss Zwisler 3383e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 33846ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 33856ddb2447STheodore Ts'o es->s_encryption_level); 33866ddb2447STheodore Ts'o goto failed_mount; 33876ddb2447STheodore Ts'o } 33886ddb2447STheodore Ts'o 3389ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3390ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3391ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3392b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3393ce40733cSAneesh Kumar K.V blocksize); 3394ac27a0ecSDave Kleikamp goto failed_mount; 3395ac27a0ecSDave Kleikamp } 3396ac27a0ecSDave Kleikamp 3397ac27a0ecSDave Kleikamp brelse(bh); 339870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 339970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3400a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3401ac27a0ecSDave Kleikamp if (!bh) { 3402b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3403b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3404ac27a0ecSDave Kleikamp goto failed_mount; 3405ac27a0ecSDave Kleikamp } 34062716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3407ac27a0ecSDave Kleikamp sbi->s_es = es; 3408617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3409b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3410b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3411ac27a0ecSDave Kleikamp goto failed_mount; 3412ac27a0ecSDave Kleikamp } 3413ac27a0ecSDave Kleikamp } 3414ac27a0ecSDave Kleikamp 3415e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 3416f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3417f287a1a5STheodore Ts'o has_huge_files); 3418f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3419ac27a0ecSDave Kleikamp 3420617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3421617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3422617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3423ac27a0ecSDave Kleikamp } else { 3424ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3425ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3426617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 34271330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3428ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3429b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3430b31e1552SEric Sandeen "unsupported inode size: %d", 3431ac27a0ecSDave Kleikamp sbi->s_inode_size); 3432ac27a0ecSDave Kleikamp goto failed_mount; 3433ac27a0ecSDave Kleikamp } 3434ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3435ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3436ac27a0ecSDave Kleikamp } 34370b8e58a1SAndreas Dilger 34380d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 3439e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 34408fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 34410d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3442d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3443b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3444b31e1552SEric Sandeen "unsupported descriptor size %lu", 34450d1ee42fSAlexandre Ratchov sbi->s_desc_size); 34460d1ee42fSAlexandre Ratchov goto failed_mount; 34470d1ee42fSAlexandre Ratchov } 34480d1ee42fSAlexandre Ratchov } else 34490d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 34500b8e58a1SAndreas Dilger 3451ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3452ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3453b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3454617ba13bSMingming Cao goto cantfind_ext4; 34550b8e58a1SAndreas Dilger 3456617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3457ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3458617ba13bSMingming Cao goto cantfind_ext4; 3459ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3460ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 34610d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3462ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3463ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3464e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3465e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 34660b8e58a1SAndreas Dilger 3467ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3468ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3469ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3470e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 3471f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3472f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3473f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3474f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3475f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 347623301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 347723301410STheodore Ts'o es->s_flags |= 347823301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3479f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3480f99b2589STheodore Ts'o #else 348123301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 348223301410STheodore Ts'o es->s_flags |= 348323301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3484f99b2589STheodore Ts'o #endif 3485f99b2589STheodore Ts'o } 348623301410STheodore Ts'o } 3487ac27a0ecSDave Kleikamp 3488281b5995STheodore Ts'o /* Handle clustersize */ 3489281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3490e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 3491281b5995STheodore Ts'o if (has_bigalloc) { 3492281b5995STheodore Ts'o if (clustersize < blocksize) { 3493281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3494281b5995STheodore Ts'o "cluster size (%d) smaller than " 3495281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3496281b5995STheodore Ts'o goto failed_mount; 3497281b5995STheodore Ts'o } 3498281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3499281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3500281b5995STheodore Ts'o sbi->s_clusters_per_group = 3501281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3502281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3503281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3504281b5995STheodore Ts'o "#clusters per group too big: %lu", 3505281b5995STheodore Ts'o sbi->s_clusters_per_group); 3506281b5995STheodore Ts'o goto failed_mount; 3507281b5995STheodore Ts'o } 3508281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3509281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3510281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3511281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3512281b5995STheodore Ts'o sbi->s_blocks_per_group, 3513281b5995STheodore Ts'o sbi->s_clusters_per_group); 3514281b5995STheodore Ts'o goto failed_mount; 3515281b5995STheodore Ts'o } 3516281b5995STheodore Ts'o } else { 3517281b5995STheodore Ts'o if (clustersize != blocksize) { 3518281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3519281b5995STheodore Ts'o "block size (%d)", clustersize, 3520281b5995STheodore Ts'o blocksize); 3521281b5995STheodore Ts'o clustersize = blocksize; 3522281b5995STheodore Ts'o } 3523ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3524b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3525b31e1552SEric Sandeen "#blocks per group too big: %lu", 3526ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3527ac27a0ecSDave Kleikamp goto failed_mount; 3528ac27a0ecSDave Kleikamp } 3529281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3530281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3531281b5995STheodore Ts'o } 3532281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3533281b5995STheodore Ts'o 3534ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3535b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3536b31e1552SEric Sandeen "#inodes per group too big: %lu", 3537ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3538ac27a0ecSDave Kleikamp goto failed_mount; 3539ac27a0ecSDave Kleikamp } 3540ac27a0ecSDave Kleikamp 3541960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3542960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3543960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3544960fd856STheodore Ts'o 3545bf43d84bSEric Sandeen /* 3546bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3547bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3548bf43d84bSEric Sandeen */ 35495a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 355030ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 35515a9ae68aSDarrick J. Wong if (err) { 3552b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3553bf43d84bSEric Sandeen " too large to mount safely on this system"); 3554ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 355590c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3556ac27a0ecSDave Kleikamp goto failed_mount; 3557ac27a0ecSDave Kleikamp } 3558ac27a0ecSDave Kleikamp 3559617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3560617ba13bSMingming Cao goto cantfind_ext4; 3561e7c95593SEric Sandeen 35620f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 35630f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 35640f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3565b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3566b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 35670f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 35680f2ddca6SFrom: Thiemo Nagel goto failed_mount; 35690f2ddca6SFrom: Thiemo Nagel } 35700f2ddca6SFrom: Thiemo Nagel 35714ec11028STheodore Ts'o /* 35724ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 35734ec11028STheodore Ts'o * of the filesystem. 35744ec11028STheodore Ts'o */ 35754ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3576b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3577b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3578e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 35794ec11028STheodore Ts'o ext4_blocks_count(es)); 3580e7c95593SEric Sandeen goto failed_mount; 3581e7c95593SEric Sandeen } 3582bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3583bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3584bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3585bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 35864ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3587b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 35884ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3589b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 35904ec11028STheodore Ts'o ext4_blocks_count(es), 35914ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 35924ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 35934ec11028STheodore Ts'o goto failed_mount; 35944ec11028STheodore Ts'o } 3595bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3596fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3597fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3598617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3599617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3600f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3601f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3602ac27a0ecSDave Kleikamp GFP_KERNEL); 3603ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3604b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 36052cde417dSTheodore Ts'o ret = -ENOMEM; 3606ac27a0ecSDave Kleikamp goto failed_mount; 3607ac27a0ecSDave Kleikamp } 3608ac27a0ecSDave Kleikamp 3609705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3610ac27a0ecSDave Kleikamp 3611ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 361270bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3613a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3614ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3615b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3616b31e1552SEric Sandeen "can't read group descriptor %d", i); 3617ac27a0ecSDave Kleikamp db_count = i; 3618ac27a0ecSDave Kleikamp goto failed_mount2; 3619ac27a0ecSDave Kleikamp } 3620ac27a0ecSDave Kleikamp } 3621bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3622b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 36236a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 3624f9ae9cf5STheodore Ts'o goto failed_mount2; 3625ac27a0ecSDave Kleikamp } 3626772cb7c8SJose R. Santos 3627f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3628ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3629ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3630ac27a0ecSDave Kleikamp 363104ecddb7SJan Mrazek setup_timer(&sbi->s_err_report, print_daily_error_info, 363204ecddb7SJan Mrazek (unsigned long) sb); 363304496411STao Ma 3634a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3635eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3636ce7e010aSTheodore Ts'o goto failed_mount3; 3637ce7e010aSTheodore Ts'o 3638c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 363967a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3640c9de560dSAlex Tomas 3641f9ae9cf5STheodore Ts'o /* 3642f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3643f9ae9cf5STheodore Ts'o */ 3644f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3645617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3646617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3647ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3648617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3649e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 36501fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 3651262b4662SJan Kara else 3652262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 365396c7e0d9SJan Kara sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 3654ac27a0ecSDave Kleikamp #endif 3655f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3656f2fa2ffcSAneesh Kumar K.V 3657ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 36583b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3659ac27a0ecSDave Kleikamp 3660ac27a0ecSDave Kleikamp sb->s_root = NULL; 3661ac27a0ecSDave Kleikamp 3662ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3663e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 3664ac27a0ecSDave Kleikamp 3665e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) 3666c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 366750460fe8SDarrick J. Wong goto failed_mount3a; 3668c5e06d10SJohann Lombardi 3669ac27a0ecSDave Kleikamp /* 3670ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3671ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3672ac27a0ecSDave Kleikamp */ 3673e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 3674617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 367550460fe8SDarrick J. Wong goto failed_mount3a; 36760390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 3677e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 3678b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3679b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3680744692dcSJiaying Zhang goto failed_mount_wq; 3681ac27a0ecSDave Kleikamp } else { 3682*1e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 3683*1e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 3684*1e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 3685*1e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 3686*1e381f60SDmitry Monakhov goto failed_mount_wq; 3687*1e381f60SDmitry Monakhov } 3688*1e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 3689*1e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 3690*1e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 3691*1e381f60SDmitry Monakhov goto failed_mount_wq; 3692*1e381f60SDmitry Monakhov } 3693*1e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 3694*1e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 3695*1e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 3696*1e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 3697*1e381f60SDmitry Monakhov goto failed_mount_wq; 3698*1e381f60SDmitry Monakhov } 3699*1e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 3700*1e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 3701*1e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 3702*1e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 3703*1e381f60SDmitry Monakhov goto failed_mount_wq; 3704*1e381f60SDmitry Monakhov } 3705*1e381f60SDmitry Monakhov sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; 3706*1e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 3707fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 37080390131bSFrank Mayhar sbi->s_journal = NULL; 37090390131bSFrank Mayhar needs_recovery = 0; 37100390131bSFrank Mayhar goto no_journal; 3711ac27a0ecSDave Kleikamp } 3712ac27a0ecSDave Kleikamp 3713e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3714eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3715eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3716b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3717744692dcSJiaying Zhang goto failed_mount_wq; 3718eb40a09cSJose R. Santos } 3719eb40a09cSJose R. Santos 372025ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 372125ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 372225ed6e8aSDarrick J. Wong "feature set"); 372325ed6e8aSDarrick J. Wong goto failed_mount_wq; 3724d4da6c9cSLinus Torvalds } 3725818d276cSGirish Shilamkar 3726ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3727ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3728ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3729ac27a0ecSDave Kleikamp case 0: 3730ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 373163f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 373263f57933SAndrew Morton * cope, else JOURNAL_DATA 373363f57933SAndrew Morton */ 3734dab291afSMingming Cao if (jbd2_journal_check_available_features 3735dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3736fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3737ac27a0ecSDave Kleikamp else 3738fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3739ac27a0ecSDave Kleikamp break; 3740ac27a0ecSDave Kleikamp 3741617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3742617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3743dab291afSMingming Cao if (!jbd2_journal_check_available_features 3744dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3745b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3746b31e1552SEric Sandeen "requested data journaling mode"); 3747744692dcSJiaying Zhang goto failed_mount_wq; 3748ac27a0ecSDave Kleikamp } 3749ac27a0ecSDave Kleikamp default: 3750ac27a0ecSDave Kleikamp break; 3751ac27a0ecSDave Kleikamp } 3752b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3753ac27a0ecSDave Kleikamp 375418aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 375518aadd47SBobi Jam 3756ce7e010aSTheodore Ts'o no_journal: 37579c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 37589c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 37599c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 37609c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 37619c191f70ST Makphaibulchoke goto failed_mount_wq; 37629c191f70ST Makphaibulchoke } 37639c191f70ST Makphaibulchoke } 37649c191f70ST Makphaibulchoke 3765e2b911c5SDarrick J. Wong if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && 37661cb767cdSTheodore Ts'o (blocksize != PAGE_CACHE_SIZE)) { 37671cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 37681cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 37691cb767cdSTheodore Ts'o goto failed_mount_wq; 37701cb767cdSTheodore Ts'o } 37711cb767cdSTheodore Ts'o 3772e2b911c5SDarrick J. Wong if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && 3773e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 3774e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 37756ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 37766ddb2447STheodore Ts'o } 37776ddb2447STheodore Ts'o 3778fd89d5f2STejun Heo /* 3779952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 3780952fc18eSTheodore Ts'o * superblock if present. 3781952fc18eSTheodore Ts'o */ 3782952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 3783952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 3784952fc18eSTheodore Ts'o else { 378507aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 378607aa2ea1SLukas Czerner if (err) 3787952fc18eSTheodore Ts'o goto failed_mount_wq; 3788952fc18eSTheodore Ts'o } 3789952fc18eSTheodore Ts'o 3790952fc18eSTheodore Ts'o /* 3791fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3792fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3793fd89d5f2STejun Heo */ 37942e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 37952e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 37962e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 37972e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 379807aa2ea1SLukas Czerner ret = -ENOMEM; 37992e8fa54eSJan Kara goto failed_mount4; 38002e8fa54eSJan Kara } 38012e8fa54eSJan Kara 3802ac27a0ecSDave Kleikamp /* 3803dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3804ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3805ac27a0ecSDave Kleikamp */ 3806ac27a0ecSDave Kleikamp 38071d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 38081d1fe1eeSDavid Howells if (IS_ERR(root)) { 3809b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 38101d1fe1eeSDavid Howells ret = PTR_ERR(root); 381132a9bb57SManish Katiyar root = NULL; 3812ac27a0ecSDave Kleikamp goto failed_mount4; 3813ac27a0ecSDave Kleikamp } 3814ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3815b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 381694bf608aSAl Viro iput(root); 3817ac27a0ecSDave Kleikamp goto failed_mount4; 3818ac27a0ecSDave Kleikamp } 381948fde701SAl Viro sb->s_root = d_make_root(root); 38201d1fe1eeSDavid Howells if (!sb->s_root) { 3821b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 38221d1fe1eeSDavid Howells ret = -ENOMEM; 38231d1fe1eeSDavid Howells goto failed_mount4; 38241d1fe1eeSDavid Howells } 3825ac27a0ecSDave Kleikamp 38267e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 38277e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 3828ef7f3835SKalpak Shah 3829ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3830ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3831ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3832ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3833e2b911c5SDarrick J. Wong if (ext4_has_feature_extra_isize(sb)) { 3834ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3835ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3836ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3837ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3838ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3839ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3840ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3841ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3842ef7f3835SKalpak Shah } 3843ef7f3835SKalpak Shah } 3844ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3845ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3846ef7f3835SKalpak Shah sbi->s_inode_size) { 3847ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3848ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3849b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3850b31e1552SEric Sandeen "available"); 3851ef7f3835SKalpak Shah } 3852ef7f3835SKalpak Shah 3853b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 385427dd4385SLukas Czerner 38556fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 38566fd058f7STheodore Ts'o if (err) { 3857b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3858fbe845ddSCurt Wohlgemuth "zone (%d)", err); 3859f9ae9cf5STheodore Ts'o goto failed_mount4a; 3860f9ae9cf5STheodore Ts'o } 3861f9ae9cf5STheodore Ts'o 3862f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 3863f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 3864f9ae9cf5STheodore Ts'o if (err) { 3865f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3866f9ae9cf5STheodore Ts'o err); 3867dcf2d804STao Ma goto failed_mount5; 3868c2774d84SAneesh Kumar K.V } 3869c2774d84SAneesh Kumar K.V 3870d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 3871d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 3872d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 3873908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 3874908c7f19STejun Heo GFP_KERNEL); 3875d5e03cbbSTheodore Ts'o if (!err) { 3876d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 3877d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 3878908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 3879908c7f19STejun Heo GFP_KERNEL); 3880d5e03cbbSTheodore Ts'o } 3881d5e03cbbSTheodore Ts'o if (!err) 3882d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3883908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 3884d5e03cbbSTheodore Ts'o if (!err) 3885908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 3886908c7f19STejun Heo GFP_KERNEL); 3887d5e03cbbSTheodore Ts'o if (err) { 3888d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3889d5e03cbbSTheodore Ts'o goto failed_mount6; 3890d5e03cbbSTheodore Ts'o } 3891d5e03cbbSTheodore Ts'o 3892e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3893d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 3894d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3895d5e03cbbSTheodore Ts'o "unable to initialize " 3896d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 3897d5e03cbbSTheodore Ts'o goto failed_mount6; 3898d5e03cbbSTheodore Ts'o } 3899d5e03cbbSTheodore Ts'o 3900bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3901bfff6873SLukas Czerner if (err) 3902dcf2d804STao Ma goto failed_mount6; 3903bfff6873SLukas Czerner 3904b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 3905dcf2d804STao Ma if (err) 3906dcf2d804STao Ma goto failed_mount7; 39073197ebdbSTheodore Ts'o 39089b2ff357SJan Kara #ifdef CONFIG_QUOTA 39099b2ff357SJan Kara /* Enable quota usage during mount. */ 3910e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { 39119b2ff357SJan Kara err = ext4_enable_quotas(sb); 39129b2ff357SJan Kara if (err) 39139b2ff357SJan Kara goto failed_mount8; 39149b2ff357SJan Kara } 39159b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 39169b2ff357SJan Kara 3917617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3918617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3919617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 39200390131bSFrank Mayhar if (needs_recovery) { 3921b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3922617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 39230390131bSFrank Mayhar } 39240390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 39250390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 39260390131bSFrank Mayhar descr = " journalled data mode"; 39270390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 39280390131bSFrank Mayhar descr = " ordered data mode"; 39290390131bSFrank Mayhar else 39300390131bSFrank Mayhar descr = " writeback data mode"; 39310390131bSFrank Mayhar } else 39320390131bSFrank Mayhar descr = "out journal"; 39330390131bSFrank Mayhar 393479add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 393579add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 393679add3a3SLukas Czerner if (!blk_queue_discard(q)) 393779add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 393879add3a3SLukas Czerner "mounting with \"discard\" option, but " 393979add3a3SLukas Czerner "the device does not support discard"); 394079add3a3SLukas Czerner } 394179add3a3SLukas Czerner 3942e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 3943d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 39448b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 39458b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3946ac27a0ecSDave Kleikamp 394766e61a9eSTheodore Ts'o if (es->s_error_count) 394866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3949ac27a0ecSDave Kleikamp 3950efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 3951efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 3952efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 3953efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 3954efbed4dcSTheodore Ts'o 3955d4c402d9SCurt Wohlgemuth kfree(orig_data); 3956ac27a0ecSDave Kleikamp return 0; 3957ac27a0ecSDave Kleikamp 3958617ba13bSMingming Cao cantfind_ext4: 3959ac27a0ecSDave Kleikamp if (!silent) 3960b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3961ac27a0ecSDave Kleikamp goto failed_mount; 3962ac27a0ecSDave Kleikamp 396372ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 396472ba7450STheodore Ts'o failed_mount8: 3965ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 396672ba7450STheodore Ts'o #endif 3967dcf2d804STao Ma failed_mount7: 3968dcf2d804STao Ma ext4_unregister_li_request(sb); 3969dcf2d804STao Ma failed_mount6: 3970f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 3971d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 3972b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 3973d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 3974d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 3975d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 3976d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 397700764937SAzat Khuzhin failed_mount5: 3978f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 3979f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 3980f9ae9cf5STheodore Ts'o failed_mount4a: 398194bf608aSAl Viro dput(sb->s_root); 398232a9bb57SManish Katiyar sb->s_root = NULL; 398394bf608aSAl Viro failed_mount4: 3984b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 39852e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 39862e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 39874c0425ffSMingming Cao failed_mount_wq: 39880390131bSFrank Mayhar if (sbi->s_journal) { 3989dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 399047b4a50bSJan Kara sbi->s_journal = NULL; 39910390131bSFrank Mayhar } 399250460fe8SDarrick J. Wong failed_mount3a: 3993d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 3994eb68d0e2SZheng Liu failed_mount3: 39959105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 3996c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 3997c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 3998ac27a0ecSDave Kleikamp failed_mount2: 3999ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4000ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4001b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4002ac27a0ecSDave Kleikamp failed_mount: 40030441984aSDarrick J. Wong if (sbi->s_chksum_driver) 40040441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4005ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4006a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4007ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4008ac27a0ecSDave Kleikamp #endif 4009617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4010ac27a0ecSDave Kleikamp brelse(bh); 4011ac27a0ecSDave Kleikamp out_fail: 4012ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4013f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4014ac27a0ecSDave Kleikamp kfree(sbi); 4015dcc7dae3SCyrill Gorcunov out_free_orig: 4016d4c402d9SCurt Wohlgemuth kfree(orig_data); 401707aa2ea1SLukas Czerner return err ? err : ret; 4018ac27a0ecSDave Kleikamp } 4019ac27a0ecSDave Kleikamp 4020ac27a0ecSDave Kleikamp /* 4021ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4022ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4023ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4024ac27a0ecSDave Kleikamp */ 4025617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4026ac27a0ecSDave Kleikamp { 4027617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4028ac27a0ecSDave Kleikamp 4029ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 403030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 403130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4032ac27a0ecSDave Kleikamp 4033a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4034ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4035dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4036ac27a0ecSDave Kleikamp else 4037dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 40385bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 40395bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 40405bf5683aSHidehiro Kawai else 40415bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4042a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4043ac27a0ecSDave Kleikamp } 4044ac27a0ecSDave Kleikamp 4045617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4046ac27a0ecSDave Kleikamp unsigned int journal_inum) 4047ac27a0ecSDave Kleikamp { 4048ac27a0ecSDave Kleikamp struct inode *journal_inode; 4049ac27a0ecSDave Kleikamp journal_t *journal; 4050ac27a0ecSDave Kleikamp 4051e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 40520390131bSFrank Mayhar 4053ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4054ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4055ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4056ac27a0ecSDave Kleikamp 40571d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 40581d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4059b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4060ac27a0ecSDave Kleikamp return NULL; 4061ac27a0ecSDave Kleikamp } 4062ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4063ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4064ac27a0ecSDave Kleikamp iput(journal_inode); 4065b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4066ac27a0ecSDave Kleikamp return NULL; 4067ac27a0ecSDave Kleikamp } 4068ac27a0ecSDave Kleikamp 4069e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4070ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 40711d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4072b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4073ac27a0ecSDave Kleikamp iput(journal_inode); 4074ac27a0ecSDave Kleikamp return NULL; 4075ac27a0ecSDave Kleikamp } 4076ac27a0ecSDave Kleikamp 4077dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4078ac27a0ecSDave Kleikamp if (!journal) { 4079b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4080ac27a0ecSDave Kleikamp iput(journal_inode); 4081ac27a0ecSDave Kleikamp return NULL; 4082ac27a0ecSDave Kleikamp } 4083ac27a0ecSDave Kleikamp journal->j_private = sb; 4084617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4085ac27a0ecSDave Kleikamp return journal; 4086ac27a0ecSDave Kleikamp } 4087ac27a0ecSDave Kleikamp 4088617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4089ac27a0ecSDave Kleikamp dev_t j_dev) 4090ac27a0ecSDave Kleikamp { 4091ac27a0ecSDave Kleikamp struct buffer_head *bh; 4092ac27a0ecSDave Kleikamp journal_t *journal; 4093617ba13bSMingming Cao ext4_fsblk_t start; 4094617ba13bSMingming Cao ext4_fsblk_t len; 4095ac27a0ecSDave Kleikamp int hblock, blocksize; 4096617ba13bSMingming Cao ext4_fsblk_t sb_block; 4097ac27a0ecSDave Kleikamp unsigned long offset; 4098617ba13bSMingming Cao struct ext4_super_block *es; 4099ac27a0ecSDave Kleikamp struct block_device *bdev; 4100ac27a0ecSDave Kleikamp 4101e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 41020390131bSFrank Mayhar 4103b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4104ac27a0ecSDave Kleikamp if (bdev == NULL) 4105ac27a0ecSDave Kleikamp return NULL; 4106ac27a0ecSDave Kleikamp 4107ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4108e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4109ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4110b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4111b31e1552SEric Sandeen "blocksize too small for journal device"); 4112ac27a0ecSDave Kleikamp goto out_bdev; 4113ac27a0ecSDave Kleikamp } 4114ac27a0ecSDave Kleikamp 4115617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4116617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4117ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4118ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4119b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4120b31e1552SEric Sandeen "external journal"); 4121ac27a0ecSDave Kleikamp goto out_bdev; 4122ac27a0ecSDave Kleikamp } 4123ac27a0ecSDave Kleikamp 41242716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4125617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4126ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4127617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4128b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4129b31e1552SEric Sandeen "bad superblock"); 4130ac27a0ecSDave Kleikamp brelse(bh); 4131ac27a0ecSDave Kleikamp goto out_bdev; 4132ac27a0ecSDave Kleikamp } 4133ac27a0ecSDave Kleikamp 4134df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4135df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4136df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4137df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4138df4763beSDarrick J. Wong "corrupt superblock"); 4139df4763beSDarrick J. Wong brelse(bh); 4140df4763beSDarrick J. Wong goto out_bdev; 4141df4763beSDarrick J. Wong } 4142df4763beSDarrick J. Wong 4143617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4144b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4145ac27a0ecSDave Kleikamp brelse(bh); 4146ac27a0ecSDave Kleikamp goto out_bdev; 4147ac27a0ecSDave Kleikamp } 4148ac27a0ecSDave Kleikamp 4149bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4150ac27a0ecSDave Kleikamp start = sb_block + 1; 4151ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4152ac27a0ecSDave Kleikamp 4153dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4154ac27a0ecSDave Kleikamp start, len, blocksize); 4155ac27a0ecSDave Kleikamp if (!journal) { 4156b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4157ac27a0ecSDave Kleikamp goto out_bdev; 4158ac27a0ecSDave Kleikamp } 4159ac27a0ecSDave Kleikamp journal->j_private = sb; 41609f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4161ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4162ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4163b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4164ac27a0ecSDave Kleikamp goto out_journal; 4165ac27a0ecSDave Kleikamp } 4166ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4167b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4168b31e1552SEric Sandeen "user (unsupported) - %d", 4169ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4170ac27a0ecSDave Kleikamp goto out_journal; 4171ac27a0ecSDave Kleikamp } 4172617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4173617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4174ac27a0ecSDave Kleikamp return journal; 41750b8e58a1SAndreas Dilger 4176ac27a0ecSDave Kleikamp out_journal: 4177dab291afSMingming Cao jbd2_journal_destroy(journal); 4178ac27a0ecSDave Kleikamp out_bdev: 4179617ba13bSMingming Cao ext4_blkdev_put(bdev); 4180ac27a0ecSDave Kleikamp return NULL; 4181ac27a0ecSDave Kleikamp } 4182ac27a0ecSDave Kleikamp 4183617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4184617ba13bSMingming Cao struct ext4_super_block *es, 4185ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4186ac27a0ecSDave Kleikamp { 4187ac27a0ecSDave Kleikamp journal_t *journal; 4188ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4189ac27a0ecSDave Kleikamp dev_t journal_dev; 4190ac27a0ecSDave Kleikamp int err = 0; 4191ac27a0ecSDave Kleikamp int really_read_only; 4192ac27a0ecSDave Kleikamp 4193e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 41940390131bSFrank Mayhar 4195ac27a0ecSDave Kleikamp if (journal_devnum && 4196ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4197b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4198b31e1552SEric Sandeen "numbers have changed"); 4199ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4200ac27a0ecSDave Kleikamp } else 4201ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4202ac27a0ecSDave Kleikamp 4203ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4204ac27a0ecSDave Kleikamp 4205ac27a0ecSDave Kleikamp /* 4206ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4207ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4208ac27a0ecSDave Kleikamp * can get read-write access to the device. 4209ac27a0ecSDave Kleikamp */ 4210e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4211ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4212b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4213b31e1552SEric Sandeen "required on readonly filesystem"); 4214ac27a0ecSDave Kleikamp if (really_read_only) { 4215b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4216b31e1552SEric Sandeen "unavailable, cannot proceed"); 4217ac27a0ecSDave Kleikamp return -EROFS; 4218ac27a0ecSDave Kleikamp } 4219b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4220b31e1552SEric Sandeen "be enabled during recovery"); 4221ac27a0ecSDave Kleikamp } 4222ac27a0ecSDave Kleikamp } 4223ac27a0ecSDave Kleikamp 4224ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4225b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4226b31e1552SEric Sandeen "and inode journals!"); 4227ac27a0ecSDave Kleikamp return -EINVAL; 4228ac27a0ecSDave Kleikamp } 4229ac27a0ecSDave Kleikamp 4230ac27a0ecSDave Kleikamp if (journal_inum) { 4231617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4232ac27a0ecSDave Kleikamp return -EINVAL; 4233ac27a0ecSDave Kleikamp } else { 4234617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4235ac27a0ecSDave Kleikamp return -EINVAL; 4236ac27a0ecSDave Kleikamp } 4237ac27a0ecSDave Kleikamp 423890576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4239b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 42404776004fSTheodore Ts'o 4241e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4242dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 42431c13d5c0STheodore Ts'o if (!err) { 42441c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 42451c13d5c0STheodore Ts'o if (save) 42461c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 42471c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4248dab291afSMingming Cao err = jbd2_journal_load(journal); 42491c13d5c0STheodore Ts'o if (save) 42501c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 42511c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 42521c13d5c0STheodore Ts'o kfree(save); 42531c13d5c0STheodore Ts'o } 4254ac27a0ecSDave Kleikamp 4255ac27a0ecSDave Kleikamp if (err) { 4256b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4257dab291afSMingming Cao jbd2_journal_destroy(journal); 4258ac27a0ecSDave Kleikamp return err; 4259ac27a0ecSDave Kleikamp } 4260ac27a0ecSDave Kleikamp 4261617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4262617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4263ac27a0ecSDave Kleikamp 4264c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4265ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4266ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4267ac27a0ecSDave Kleikamp 4268ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4269e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4270ac27a0ecSDave Kleikamp } 4271ac27a0ecSDave Kleikamp 4272ac27a0ecSDave Kleikamp return 0; 4273ac27a0ecSDave Kleikamp } 4274ac27a0ecSDave Kleikamp 4275e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4276ac27a0ecSDave Kleikamp { 4277e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4278617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4279c4be0c1dSTakashi Sato int error = 0; 4280ac27a0ecSDave Kleikamp 4281bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4282c4be0c1dSTakashi Sato return error; 4283914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4284914258bfSTheodore Ts'o /* 4285914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4286914258bfSTheodore Ts'o * superblock failed. This could happen because the 4287914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4288914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4289914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4290914258bfSTheodore Ts'o * write and hope for the best. 4291914258bfSTheodore Ts'o */ 4292b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4293b31e1552SEric Sandeen "superblock detected"); 4294914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4295914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4296914258bfSTheodore Ts'o } 429771290b36STheodore Ts'o /* 429871290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 429971290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 430071290b36STheodore Ts'o * write time when we are mounting the root file system 430171290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 430271290b36STheodore Ts'o * for people who are east of GMT and who make their clock 430371290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 430471290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 430571290b36STheodore Ts'o * to complain and force a full file system check. 430671290b36STheodore Ts'o */ 430771290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4308ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4309f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4310afc32f7eSTheodore Ts'o es->s_kbytes_written = 4311afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4312afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4313afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4314f613dfcbSTheodore Ts'o else 4315f613dfcbSTheodore Ts'o es->s_kbytes_written = 4316f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4317d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 431857042651STheodore Ts'o ext4_free_blocks_count_set(es, 431957042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 432057042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4321d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 43227f93cff9STheodore Ts'o es->s_free_inodes_count = 43237f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 43245d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4325ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 432606db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4327ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4328914258bfSTheodore Ts'o if (sync) { 4329564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 4330564bc402SDaeho Jeong test_opt(sb, BARRIER) ? WRITE_FUA : WRITE_SYNC); 4331c4be0c1dSTakashi Sato if (error) 4332c4be0c1dSTakashi Sato return error; 4333c4be0c1dSTakashi Sato 4334c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4335c4be0c1dSTakashi Sato if (error) { 4336b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4337b31e1552SEric Sandeen "superblock"); 4338914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4339914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4340914258bfSTheodore Ts'o } 4341914258bfSTheodore Ts'o } 4342c4be0c1dSTakashi Sato return error; 4343ac27a0ecSDave Kleikamp } 4344ac27a0ecSDave Kleikamp 4345ac27a0ecSDave Kleikamp /* 4346ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4347ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4348ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4349ac27a0ecSDave Kleikamp */ 4350617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4351617ba13bSMingming Cao struct ext4_super_block *es) 4352ac27a0ecSDave Kleikamp { 4353617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4354ac27a0ecSDave Kleikamp 4355e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 43560390131bSFrank Mayhar BUG_ON(journal != NULL); 43570390131bSFrank Mayhar return; 43580390131bSFrank Mayhar } 4359dab291afSMingming Cao jbd2_journal_lock_updates(journal); 43607ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 43617ffe1ea8SHidehiro Kawai goto out; 43627ffe1ea8SHidehiro Kawai 4363e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb) && 4364ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4365e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4366e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4367ac27a0ecSDave Kleikamp } 43687ffe1ea8SHidehiro Kawai 43697ffe1ea8SHidehiro Kawai out: 4370dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4371ac27a0ecSDave Kleikamp } 4372ac27a0ecSDave Kleikamp 4373ac27a0ecSDave Kleikamp /* 4374ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4375ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4376ac27a0ecSDave Kleikamp * main filesystem now. 4377ac27a0ecSDave Kleikamp */ 4378617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4379617ba13bSMingming Cao struct ext4_super_block *es) 4380ac27a0ecSDave Kleikamp { 4381ac27a0ecSDave Kleikamp journal_t *journal; 4382ac27a0ecSDave Kleikamp int j_errno; 4383ac27a0ecSDave Kleikamp const char *errstr; 4384ac27a0ecSDave Kleikamp 4385e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 43860390131bSFrank Mayhar 4387617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4388ac27a0ecSDave Kleikamp 4389ac27a0ecSDave Kleikamp /* 4390ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4391617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4392ac27a0ecSDave Kleikamp */ 4393ac27a0ecSDave Kleikamp 4394dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4395ac27a0ecSDave Kleikamp if (j_errno) { 4396ac27a0ecSDave Kleikamp char nbuf[16]; 4397ac27a0ecSDave Kleikamp 4398617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 439912062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4400ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 440112062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4402ac27a0ecSDave Kleikamp 4403617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4404617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4405e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4406ac27a0ecSDave Kleikamp 4407dab291afSMingming Cao jbd2_journal_clear_err(journal); 4408d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4409ac27a0ecSDave Kleikamp } 4410ac27a0ecSDave Kleikamp } 4411ac27a0ecSDave Kleikamp 4412ac27a0ecSDave Kleikamp /* 4413ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4414ac27a0ecSDave Kleikamp * and wait on the commit. 4415ac27a0ecSDave Kleikamp */ 4416617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4417ac27a0ecSDave Kleikamp { 4418ac27a0ecSDave Kleikamp journal_t *journal; 4419ac27a0ecSDave Kleikamp 4420ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4421ac27a0ecSDave Kleikamp return 0; 4422ac27a0ecSDave Kleikamp 4423617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4424b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4425ac27a0ecSDave Kleikamp } 4426ac27a0ecSDave Kleikamp 4427617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4428ac27a0ecSDave Kleikamp { 442914ce0cb4STheodore Ts'o int ret = 0; 44309eddacf9SJan Kara tid_t target; 443106a407f1SDmitry Monakhov bool needs_barrier = false; 44328d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4433ac27a0ecSDave Kleikamp 44349bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 44352e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4436a1177825SJan Kara /* 4437a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4438a1177825SJan Kara * no dirty dquots 4439a1177825SJan Kara */ 4440a1177825SJan Kara dquot_writeback_dquots(sb, -1); 444106a407f1SDmitry Monakhov /* 444206a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 444306a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 444406a407f1SDmitry Monakhov * transaction_commit will do it for us. 444506a407f1SDmitry Monakhov */ 4446bda32530STheodore Ts'o if (sbi->s_journal) { 444706a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 444806a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 444906a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 445006a407f1SDmitry Monakhov needs_barrier = true; 445106a407f1SDmitry Monakhov 44528d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4453ac27a0ecSDave Kleikamp if (wait) 4454bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4455bda32530STheodore Ts'o target); 44560390131bSFrank Mayhar } 4457bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4458bda32530STheodore Ts'o needs_barrier = true; 445906a407f1SDmitry Monakhov if (needs_barrier) { 446006a407f1SDmitry Monakhov int err; 446106a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 446206a407f1SDmitry Monakhov if (!ret) 446306a407f1SDmitry Monakhov ret = err; 446406a407f1SDmitry Monakhov } 446506a407f1SDmitry Monakhov 446606a407f1SDmitry Monakhov return ret; 446706a407f1SDmitry Monakhov } 446806a407f1SDmitry Monakhov 4469ac27a0ecSDave Kleikamp /* 4470ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4471ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4472be4f27d3SYongqiang Yang * 4473be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 44748e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 44758e8ad8a5SJan Kara * modifications. 4476ac27a0ecSDave Kleikamp */ 4477c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4478ac27a0ecSDave Kleikamp { 4479c4be0c1dSTakashi Sato int error = 0; 4480c4be0c1dSTakashi Sato journal_t *journal; 4481ac27a0ecSDave Kleikamp 44829ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 44839ca92389STheodore Ts'o return 0; 44849ca92389STheodore Ts'o 4485c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4486ac27a0ecSDave Kleikamp 4487bb044576STheodore Ts'o if (journal) { 4488ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4489dab291afSMingming Cao jbd2_journal_lock_updates(journal); 44907ffe1ea8SHidehiro Kawai 44917ffe1ea8SHidehiro Kawai /* 4492bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4493bb044576STheodore Ts'o * flush the journal. 44947ffe1ea8SHidehiro Kawai */ 4495c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 44966b0310fbSEric Sandeen if (error < 0) 44976b0310fbSEric Sandeen goto out; 4498ac27a0ecSDave Kleikamp 4499ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4500e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4501c642dc9eSEric Sandeen } 4502c642dc9eSEric Sandeen 4503e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 45046b0310fbSEric Sandeen out: 4505bb044576STheodore Ts'o if (journal) 45068e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4507bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 45086b0310fbSEric Sandeen return error; 4509ac27a0ecSDave Kleikamp } 4510ac27a0ecSDave Kleikamp 4511ac27a0ecSDave Kleikamp /* 4512ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4513ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4514ac27a0ecSDave Kleikamp */ 4515c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4516ac27a0ecSDave Kleikamp { 45179ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 45189ca92389STheodore Ts'o return 0; 45199ca92389STheodore Ts'o 4520c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 45219ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4522e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 4523c642dc9eSEric Sandeen } 4524c642dc9eSEric Sandeen 4525e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4526c4be0c1dSTakashi Sato return 0; 4527ac27a0ecSDave Kleikamp } 4528ac27a0ecSDave Kleikamp 4529673c6100STheodore Ts'o /* 4530673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4531673c6100STheodore Ts'o */ 4532673c6100STheodore Ts'o struct ext4_mount_options { 4533673c6100STheodore Ts'o unsigned long s_mount_opt; 4534a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 453508cefc7aSEric W. Biederman kuid_t s_resuid; 453608cefc7aSEric W. Biederman kgid_t s_resgid; 4537673c6100STheodore Ts'o unsigned long s_commit_interval; 4538673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4539673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4540673c6100STheodore Ts'o int s_jquota_fmt; 4541a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4542673c6100STheodore Ts'o #endif 4543673c6100STheodore Ts'o }; 4544673c6100STheodore Ts'o 4545617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4546ac27a0ecSDave Kleikamp { 4547617ba13bSMingming Cao struct ext4_super_block *es; 4548617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4549ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4550617ba13bSMingming Cao struct ext4_mount_options old_opts; 4551c79d967dSChristoph Hellwig int enable_quota = 0; 45528a266467STheodore Ts'o ext4_group_t g; 4553b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4554c5e06d10SJohann Lombardi int err = 0; 4555ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 455603dafb5fSChen Gang int i, j; 4557ac27a0ecSDave Kleikamp #endif 4558d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4559ac27a0ecSDave Kleikamp 4560ac27a0ecSDave Kleikamp /* Store the original options */ 4561ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4562ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4563a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4564ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4565ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4566ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 456730773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 456830773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4569ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4570ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4571a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 457203dafb5fSChen Gang if (sbi->s_qf_names[i]) { 457303dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 457403dafb5fSChen Gang GFP_KERNEL); 457503dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 457603dafb5fSChen Gang for (j = 0; j < i; j++) 457703dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 45783e36a163SWei Yongjun kfree(orig_data); 457903dafb5fSChen Gang return -ENOMEM; 458003dafb5fSChen Gang } 458103dafb5fSChen Gang } else 458203dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4583ac27a0ecSDave Kleikamp #endif 4584b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4585b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4586ac27a0ecSDave Kleikamp 4587661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4588ac27a0ecSDave Kleikamp err = -EINVAL; 4589ac27a0ecSDave Kleikamp goto restore_opts; 4590ac27a0ecSDave Kleikamp } 4591ac27a0ecSDave Kleikamp 45926b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 45936b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 45946b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 45952d5b86e0SEric Sandeen "during remount not supported; ignoring"); 45962d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 4597c6d3d56dSDarrick J. Wong } 4598c6d3d56dSDarrick J. Wong 45996ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 46006ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 46016ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 46026ae6514bSPiotr Sarna "both data=journal and delalloc"); 46036ae6514bSPiotr Sarna err = -EINVAL; 46046ae6514bSPiotr Sarna goto restore_opts; 46056ae6514bSPiotr Sarna } 46066ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 46076ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 46086ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 46096ae6514bSPiotr Sarna err = -EINVAL; 46106ae6514bSPiotr Sarna goto restore_opts; 46116ae6514bSPiotr Sarna } 4612923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 4613923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4614923ae0ffSRoss Zwisler "both data=journal and dax"); 4615923ae0ffSRoss Zwisler err = -EINVAL; 4616923ae0ffSRoss Zwisler goto restore_opts; 4617923ae0ffSRoss Zwisler } 4618923ae0ffSRoss Zwisler } 4619923ae0ffSRoss Zwisler 4620923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 4621923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 4622923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 4623923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 46246ae6514bSPiotr Sarna } 46256ae6514bSPiotr Sarna 46264ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4627c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4628ac27a0ecSDave Kleikamp 4629ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4630482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4631ac27a0ecSDave Kleikamp 4632ac27a0ecSDave Kleikamp es = sbi->s_es; 4633ac27a0ecSDave Kleikamp 4634b3881f74STheodore Ts'o if (sbi->s_journal) { 4635617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4636b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4637b3881f74STheodore Ts'o } 4638ac27a0ecSDave Kleikamp 4639a2fd66d0STheodore Ts'o if (*flags & MS_LAZYTIME) 4640a2fd66d0STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 4641a2fd66d0STheodore Ts'o 4642661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 46434ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4644ac27a0ecSDave Kleikamp err = -EROFS; 4645ac27a0ecSDave Kleikamp goto restore_opts; 4646ac27a0ecSDave Kleikamp } 4647ac27a0ecSDave Kleikamp 4648ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 464938c03b34STheodore Ts'o err = sync_filesystem(sb); 465038c03b34STheodore Ts'o if (err < 0) 465138c03b34STheodore Ts'o goto restore_opts; 46520f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 46530f0dd62fSChristoph Hellwig if (err < 0) 4654c79d967dSChristoph Hellwig goto restore_opts; 4655c79d967dSChristoph Hellwig 4656ac27a0ecSDave Kleikamp /* 4657ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4658ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4659ac27a0ecSDave Kleikamp */ 4660ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4661ac27a0ecSDave Kleikamp 4662ac27a0ecSDave Kleikamp /* 4663ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4664ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4665ac27a0ecSDave Kleikamp * mark the partition as valid again. 4666ac27a0ecSDave Kleikamp */ 4667617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4668617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4669ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4670ac27a0ecSDave Kleikamp 4671a63c9eb2STheodore Ts'o if (sbi->s_journal) 4672617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4673ac27a0ecSDave Kleikamp } else { 4674a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4675e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 46762cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 4677ac27a0ecSDave Kleikamp err = -EROFS; 4678ac27a0ecSDave Kleikamp goto restore_opts; 4679ac27a0ecSDave Kleikamp } 4680ead6596bSEric Sandeen /* 46818a266467STheodore Ts'o * Make sure the group descriptor checksums 46820b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 46838a266467STheodore Ts'o */ 46848a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 46858a266467STheodore Ts'o struct ext4_group_desc *gdp = 46868a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 46878a266467STheodore Ts'o 4688feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4689b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4690b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 4691e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 46928a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 46936a797d27SDarrick J. Wong err = -EFSBADCRC; 46948a266467STheodore Ts'o goto restore_opts; 46958a266467STheodore Ts'o } 46968a266467STheodore Ts'o } 46978a266467STheodore Ts'o 46988a266467STheodore Ts'o /* 4699ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4700ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4701ead6596bSEric Sandeen * require a full umount/remount for now. 4702ead6596bSEric Sandeen */ 4703ead6596bSEric Sandeen if (es->s_last_orphan) { 4704b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4705ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4706ead6596bSEric Sandeen "orphan inode list. Please " 4707b31e1552SEric Sandeen "umount/remount instead"); 4708ead6596bSEric Sandeen err = -EINVAL; 4709ead6596bSEric Sandeen goto restore_opts; 4710ead6596bSEric Sandeen } 4711ead6596bSEric Sandeen 4712ac27a0ecSDave Kleikamp /* 4713ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4714ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4715ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4716ac27a0ecSDave Kleikamp * the partition.) 4717ac27a0ecSDave Kleikamp */ 47180390131bSFrank Mayhar if (sbi->s_journal) 4719617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4720ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4721617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4722ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4723e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 4724c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4725c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4726c5e06d10SJohann Lombardi err = -EROFS; 4727c5e06d10SJohann Lombardi goto restore_opts; 4728c5e06d10SJohann Lombardi } 4729c79d967dSChristoph Hellwig enable_quota = 1; 4730ac27a0ecSDave Kleikamp } 4731ac27a0ecSDave Kleikamp } 4732bfff6873SLukas Czerner 4733bfff6873SLukas Czerner /* 4734bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4735bfff6873SLukas Czerner * current settings 4736bfff6873SLukas Czerner */ 4737bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4738bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4739bfff6873SLukas Czerner else { 4740bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4741bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4742bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4743bfff6873SLukas Czerner } 4744bfff6873SLukas Czerner 47456fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4746d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 4747e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 47480390131bSFrank Mayhar 4749ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4750ac27a0ecSDave Kleikamp /* Release old quota file names */ 4751a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4752ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 47537c319d32SAditya Kali if (enable_quota) { 47547c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 47550f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4756e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 47577c319d32SAditya Kali err = ext4_enable_quotas(sb); 475807724f98STheodore Ts'o if (err) 47597c319d32SAditya Kali goto restore_opts; 47607c319d32SAditya Kali } 47617c319d32SAditya Kali } 47627c319d32SAditya Kali #endif 4763d4c402d9SCurt Wohlgemuth 4764a26f4992STheodore Ts'o *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); 4765d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4766d4c402d9SCurt Wohlgemuth kfree(orig_data); 4767ac27a0ecSDave Kleikamp return 0; 47680b8e58a1SAndreas Dilger 4769ac27a0ecSDave Kleikamp restore_opts: 4770ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4771ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4772a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4773ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4774ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4775ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 477630773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 477730773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4778ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4779ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4780a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 4781ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4782ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4783ac27a0ecSDave Kleikamp } 4784ac27a0ecSDave Kleikamp #endif 4785d4c402d9SCurt Wohlgemuth kfree(orig_data); 4786ac27a0ecSDave Kleikamp return err; 4787ac27a0ecSDave Kleikamp } 4788ac27a0ecSDave Kleikamp 4789617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4790ac27a0ecSDave Kleikamp { 4791ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4792617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4793617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 479427dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 4795960cc398SPekka Enberg u64 fsid; 4796d02a9391SKazuya Mio s64 bfree; 479727dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 4798ac27a0ecSDave Kleikamp 4799952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 4800952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 4801ac27a0ecSDave Kleikamp 4802617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4803ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4804b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 480557042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 480657042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4807d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 480857042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 480927dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 481027dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 481127dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 4812ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4813ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 481452d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4815617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4816960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4817960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4818960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4819960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 48200b8e58a1SAndreas Dilger 4821ac27a0ecSDave Kleikamp return 0; 4822ac27a0ecSDave Kleikamp } 4823ac27a0ecSDave Kleikamp 48240b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 48250b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4826ac27a0ecSDave Kleikamp * Process 1 Process 2 4827617ba13bSMingming Cao * ext4_create() quota_sync() 4828dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4829871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4830dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4831ac27a0ecSDave Kleikamp * 4832ac27a0ecSDave Kleikamp */ 4833ac27a0ecSDave Kleikamp 4834ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4835ac27a0ecSDave Kleikamp 4836ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4837ac27a0ecSDave Kleikamp { 48384c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 4839ac27a0ecSDave Kleikamp } 4840ac27a0ecSDave Kleikamp 4841617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4842ac27a0ecSDave Kleikamp { 4843ac27a0ecSDave Kleikamp int ret, err; 4844ac27a0ecSDave Kleikamp handle_t *handle; 4845ac27a0ecSDave Kleikamp struct inode *inode; 4846ac27a0ecSDave Kleikamp 4847ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 48489924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 4849617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4850ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4851ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4852ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4853617ba13bSMingming Cao err = ext4_journal_stop(handle); 4854ac27a0ecSDave Kleikamp if (!ret) 4855ac27a0ecSDave Kleikamp ret = err; 4856ac27a0ecSDave Kleikamp return ret; 4857ac27a0ecSDave Kleikamp } 4858ac27a0ecSDave Kleikamp 4859617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4860ac27a0ecSDave Kleikamp { 4861ac27a0ecSDave Kleikamp int ret, err; 4862ac27a0ecSDave Kleikamp handle_t *handle; 4863ac27a0ecSDave Kleikamp 48649924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 4865617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4866ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4867ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4868ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4869617ba13bSMingming Cao err = ext4_journal_stop(handle); 4870ac27a0ecSDave Kleikamp if (!ret) 4871ac27a0ecSDave Kleikamp ret = err; 4872ac27a0ecSDave Kleikamp return ret; 4873ac27a0ecSDave Kleikamp } 4874ac27a0ecSDave Kleikamp 4875617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4876ac27a0ecSDave Kleikamp { 4877ac27a0ecSDave Kleikamp int ret, err; 4878ac27a0ecSDave Kleikamp handle_t *handle; 4879ac27a0ecSDave Kleikamp 48809924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 4881617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 48829c3013e9SJan Kara if (IS_ERR(handle)) { 48839c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 48849c3013e9SJan Kara dquot_release(dquot); 4885ac27a0ecSDave Kleikamp return PTR_ERR(handle); 48869c3013e9SJan Kara } 4887ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4888617ba13bSMingming Cao err = ext4_journal_stop(handle); 4889ac27a0ecSDave Kleikamp if (!ret) 4890ac27a0ecSDave Kleikamp ret = err; 4891ac27a0ecSDave Kleikamp return ret; 4892ac27a0ecSDave Kleikamp } 4893ac27a0ecSDave Kleikamp 4894617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4895ac27a0ecSDave Kleikamp { 4896262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 4897262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4898262b4662SJan Kara 48992c8be6b2SJan Kara /* Are we journaling quotas? */ 4900e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 4901262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 4902ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4903617ba13bSMingming Cao return ext4_write_dquot(dquot); 4904ac27a0ecSDave Kleikamp } else { 4905ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4906ac27a0ecSDave Kleikamp } 4907ac27a0ecSDave Kleikamp } 4908ac27a0ecSDave Kleikamp 4909617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4910ac27a0ecSDave Kleikamp { 4911ac27a0ecSDave Kleikamp int ret, err; 4912ac27a0ecSDave Kleikamp handle_t *handle; 4913ac27a0ecSDave Kleikamp 4914ac27a0ecSDave Kleikamp /* Data block + inode block */ 49152b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 4916ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4917ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4918ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4919617ba13bSMingming Cao err = ext4_journal_stop(handle); 4920ac27a0ecSDave Kleikamp if (!ret) 4921ac27a0ecSDave Kleikamp ret = err; 4922ac27a0ecSDave Kleikamp return ret; 4923ac27a0ecSDave Kleikamp } 4924ac27a0ecSDave Kleikamp 4925ac27a0ecSDave Kleikamp /* 4926ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4927ac27a0ecSDave Kleikamp * the quota file and such... 4928ac27a0ecSDave Kleikamp */ 4929617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4930ac27a0ecSDave Kleikamp { 4931287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4932617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4933ac27a0ecSDave Kleikamp } 4934ac27a0ecSDave Kleikamp 4935ac27a0ecSDave Kleikamp /* 4936ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4937ac27a0ecSDave Kleikamp */ 4938617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4939f00c9e44SJan Kara struct path *path) 4940ac27a0ecSDave Kleikamp { 4941ac27a0ecSDave Kleikamp int err; 4942ac27a0ecSDave Kleikamp 4943ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4944ac27a0ecSDave Kleikamp return -EINVAL; 49450623543bSJan Kara 4946ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4947d8c9584eSAl Viro if (path->dentry->d_sb != sb) 4948ac27a0ecSDave Kleikamp return -EXDEV; 49490623543bSJan Kara /* Journaling quota? */ 49500623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 49512b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4952f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4953b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4954b31e1552SEric Sandeen "Quota file not on filesystem root. " 4955b31e1552SEric Sandeen "Journaled quota will not work"); 49560623543bSJan Kara } 49570623543bSJan Kara 49580623543bSJan Kara /* 49590623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 49600623543bSJan Kara * all updates to the file when we bypass pagecache... 49610623543bSJan Kara */ 49620390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 49632b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 49640623543bSJan Kara /* 49650623543bSJan Kara * We don't need to lock updates but journal_flush() could 49660623543bSJan Kara * otherwise be livelocked... 49670623543bSJan Kara */ 49680623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 49697ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 49700623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4971f00c9e44SJan Kara if (err) 49727ffe1ea8SHidehiro Kawai return err; 49737ffe1ea8SHidehiro Kawai } 49740623543bSJan Kara 4975f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4976ac27a0ecSDave Kleikamp } 4977ac27a0ecSDave Kleikamp 49787c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 49797c319d32SAditya Kali unsigned int flags) 49807c319d32SAditya Kali { 49817c319d32SAditya Kali int err; 49827c319d32SAditya Kali struct inode *qf_inode; 4983a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 49847c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 49857c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 49867c319d32SAditya Kali }; 49877c319d32SAditya Kali 4988e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 49897c319d32SAditya Kali 49907c319d32SAditya Kali if (!qf_inums[type]) 49917c319d32SAditya Kali return -EPERM; 49927c319d32SAditya Kali 49937c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 49947c319d32SAditya Kali if (IS_ERR(qf_inode)) { 49957c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 49967c319d32SAditya Kali return PTR_ERR(qf_inode); 49977c319d32SAditya Kali } 49987c319d32SAditya Kali 4999bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5000bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 50017c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 50027c319d32SAditya Kali iput(qf_inode); 50037c319d32SAditya Kali 50047c319d32SAditya Kali return err; 50057c319d32SAditya Kali } 50067c319d32SAditya Kali 50077c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 50087c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 50097c319d32SAditya Kali { 50107c319d32SAditya Kali int type, err = 0; 5011a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 50127c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 50137c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 50147c319d32SAditya Kali }; 50157c319d32SAditya Kali 50167c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5017a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 50187c319d32SAditya Kali if (qf_inums[type]) { 50197c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 50207c319d32SAditya Kali DQUOT_USAGE_ENABLED); 50217c319d32SAditya Kali if (err) { 50227c319d32SAditya Kali ext4_warning(sb, 502372ba7450STheodore Ts'o "Failed to enable quota tracking " 502472ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 502572ba7450STheodore Ts'o "e2fsck to fix.", type, err); 50267c319d32SAditya Kali return err; 50277c319d32SAditya Kali } 50287c319d32SAditya Kali } 50297c319d32SAditya Kali } 50307c319d32SAditya Kali return 0; 50317c319d32SAditya Kali } 50327c319d32SAditya Kali 5033ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5034ca0e05e4SDmitry Monakhov { 503521f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 503621f97697SJan Kara handle_t *handle; 503721f97697SJan Kara 503887009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 503987009d86SDmitry Monakhov * Caller already holds s_umount sem */ 504087009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5041ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5042ca0e05e4SDmitry Monakhov 50430b268590SAmir Goldstein if (!inode) 50440b268590SAmir Goldstein goto out; 50450b268590SAmir Goldstein 504621f97697SJan Kara /* Update modification times of quota files when userspace can 504721f97697SJan Kara * start looking at them */ 50489924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 504921f97697SJan Kara if (IS_ERR(handle)) 505021f97697SJan Kara goto out; 505121f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 505221f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 505321f97697SJan Kara ext4_journal_stop(handle); 505421f97697SJan Kara 505521f97697SJan Kara out: 5056ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5057ca0e05e4SDmitry Monakhov } 5058ca0e05e4SDmitry Monakhov 5059ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5060ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5061ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5062ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5063617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5064ac27a0ecSDave Kleikamp size_t len, loff_t off) 5065ac27a0ecSDave Kleikamp { 5066ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5067725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5068ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5069ac27a0ecSDave Kleikamp int tocopy; 5070ac27a0ecSDave Kleikamp size_t toread; 5071ac27a0ecSDave Kleikamp struct buffer_head *bh; 5072ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5073ac27a0ecSDave Kleikamp 5074ac27a0ecSDave Kleikamp if (off > i_size) 5075ac27a0ecSDave Kleikamp return 0; 5076ac27a0ecSDave Kleikamp if (off+len > i_size) 5077ac27a0ecSDave Kleikamp len = i_size-off; 5078ac27a0ecSDave Kleikamp toread = len; 5079ac27a0ecSDave Kleikamp while (toread > 0) { 5080ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5081ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 50821c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 50831c215028STheodore Ts'o if (IS_ERR(bh)) 50841c215028STheodore Ts'o return PTR_ERR(bh); 5085ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5086ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5087ac27a0ecSDave Kleikamp else 5088ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5089ac27a0ecSDave Kleikamp brelse(bh); 5090ac27a0ecSDave Kleikamp offset = 0; 5091ac27a0ecSDave Kleikamp toread -= tocopy; 5092ac27a0ecSDave Kleikamp data += tocopy; 5093ac27a0ecSDave Kleikamp blk++; 5094ac27a0ecSDave Kleikamp } 5095ac27a0ecSDave Kleikamp return len; 5096ac27a0ecSDave Kleikamp } 5097ac27a0ecSDave Kleikamp 5098ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5099ac27a0ecSDave Kleikamp * enough credits) */ 5100617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5101ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5102ac27a0ecSDave Kleikamp { 5103ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5104725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 51051c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5106c5e298aeSTheodore Ts'o int retries = 0; 5107ac27a0ecSDave Kleikamp struct buffer_head *bh; 5108ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5109ac27a0ecSDave Kleikamp 51100390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5111b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5112b31e1552SEric Sandeen " cancelled because transaction is not started", 51139c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 51149c3013e9SJan Kara return -EIO; 51159c3013e9SJan Kara } 511667eeb568SDmitry Monakhov /* 511767eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 511867eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 511967eeb568SDmitry Monakhov */ 512067eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 512167eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 512267eeb568SDmitry Monakhov " cancelled because not block aligned", 512367eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 512467eeb568SDmitry Monakhov return -EIO; 512567eeb568SDmitry Monakhov } 512667eeb568SDmitry Monakhov 5127c5e298aeSTheodore Ts'o do { 5128c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5129c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5130c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5131c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5132c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 51331c215028STheodore Ts'o if (IS_ERR(bh)) 51341c215028STheodore Ts'o return PTR_ERR(bh); 5135ac27a0ecSDave Kleikamp if (!bh) 5136ac27a0ecSDave Kleikamp goto out; 51375d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5138617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5139ac27a0ecSDave Kleikamp if (err) { 5140ac27a0ecSDave Kleikamp brelse(bh); 51411c215028STheodore Ts'o return err; 5142ac27a0ecSDave Kleikamp } 5143ac27a0ecSDave Kleikamp lock_buffer(bh); 514467eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5145ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5146ac27a0ecSDave Kleikamp unlock_buffer(bh); 51470390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5148ac27a0ecSDave Kleikamp brelse(bh); 5149ac27a0ecSDave Kleikamp out: 515067eeb568SDmitry Monakhov if (inode->i_size < off + len) { 515167eeb568SDmitry Monakhov i_size_write(inode, off + len); 5152617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5153617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 515421f97697SJan Kara } 515567eeb568SDmitry Monakhov return len; 5156ac27a0ecSDave Kleikamp } 5157ac27a0ecSDave Kleikamp 5158ac27a0ecSDave Kleikamp #endif 5159ac27a0ecSDave Kleikamp 5160152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5161152a0836SAl Viro const char *dev_name, void *data) 5162ac27a0ecSDave Kleikamp { 5163152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5164ac27a0ecSDave Kleikamp } 5165ac27a0ecSDave Kleikamp 5166c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 516724b58424STheodore Ts'o static inline void register_as_ext2(void) 516824b58424STheodore Ts'o { 516924b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 517024b58424STheodore Ts'o if (err) 517124b58424STheodore Ts'o printk(KERN_WARNING 517224b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 517324b58424STheodore Ts'o } 517424b58424STheodore Ts'o 517524b58424STheodore Ts'o static inline void unregister_as_ext2(void) 517624b58424STheodore Ts'o { 517724b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 517824b58424STheodore Ts'o } 51792035e776STheodore Ts'o 51802035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 51812035e776STheodore Ts'o { 5182e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 51832035e776STheodore Ts'o return 0; 51842035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 51852035e776STheodore Ts'o return 1; 5186e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 51872035e776STheodore Ts'o return 0; 51882035e776STheodore Ts'o return 1; 51892035e776STheodore Ts'o } 519024b58424STheodore Ts'o #else 519124b58424STheodore Ts'o static inline void register_as_ext2(void) { } 519224b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 51932035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 519424b58424STheodore Ts'o #endif 519524b58424STheodore Ts'o 519624b58424STheodore Ts'o static inline void register_as_ext3(void) 519724b58424STheodore Ts'o { 519824b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 519924b58424STheodore Ts'o if (err) 520024b58424STheodore Ts'o printk(KERN_WARNING 520124b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 520224b58424STheodore Ts'o } 520324b58424STheodore Ts'o 520424b58424STheodore Ts'o static inline void unregister_as_ext3(void) 520524b58424STheodore Ts'o { 520624b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 520724b58424STheodore Ts'o } 52082035e776STheodore Ts'o 52092035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 52102035e776STheodore Ts'o { 5211e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 52122035e776STheodore Ts'o return 0; 5213e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 52142035e776STheodore Ts'o return 0; 52152035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 52162035e776STheodore Ts'o return 1; 5217e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 52182035e776STheodore Ts'o return 0; 52192035e776STheodore Ts'o return 1; 52202035e776STheodore Ts'o } 522124b58424STheodore Ts'o 522203010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5223ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 522403010a33STheodore Ts'o .name = "ext4", 5225152a0836SAl Viro .mount = ext4_mount, 5226ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5227ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5228ac27a0ecSDave Kleikamp }; 52297f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5230ac27a0ecSDave Kleikamp 5231e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5232e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5233e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5234e9e3bcecSEric Sandeen 52355dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5236ac27a0ecSDave Kleikamp { 5237e9e3bcecSEric Sandeen int i, err; 5238c9de560dSAlex Tomas 5239e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 524007c0c5d8SAl Viro ext4_li_info = NULL; 524107c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 524207c0c5d8SAl Viro 52439a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 524412e9b892SDmitry Monakhov ext4_check_flag_values(); 5245e9e3bcecSEric Sandeen 5246e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5247e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5248e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5249e9e3bcecSEric Sandeen } 5250e9e3bcecSEric Sandeen 525151865fdaSZheng Liu err = ext4_init_es(); 52526fd058f7STheodore Ts'o if (err) 52536fd058f7STheodore Ts'o return err; 525451865fdaSZheng Liu 525551865fdaSZheng Liu err = ext4_init_pageio(); 525651865fdaSZheng Liu if (err) 5257b5799018STheodore Ts'o goto out5; 525851865fdaSZheng Liu 52595dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5260bd2d0210STheodore Ts'o if (err) 5261b5799018STheodore Ts'o goto out4; 5262857ac889SLukas Czerner 5263b5799018STheodore Ts'o err = ext4_init_sysfs(); 5264dd68314cSTheodore Ts'o if (err) 5265b5799018STheodore Ts'o goto out3; 5266857ac889SLukas Czerner 52675dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5268ac27a0ecSDave Kleikamp if (err) 5269c9de560dSAlex Tomas goto out2; 52709c191f70ST Makphaibulchoke else 52719c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5272ac27a0ecSDave Kleikamp err = init_inodecache(); 5273ac27a0ecSDave Kleikamp if (err) 5274ac27a0ecSDave Kleikamp goto out1; 527524b58424STheodore Ts'o register_as_ext3(); 52762035e776STheodore Ts'o register_as_ext2(); 527703010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5278ac27a0ecSDave Kleikamp if (err) 5279ac27a0ecSDave Kleikamp goto out; 5280bfff6873SLukas Czerner 5281ac27a0ecSDave Kleikamp return 0; 5282ac27a0ecSDave Kleikamp out: 528324b58424STheodore Ts'o unregister_as_ext2(); 528424b58424STheodore Ts'o unregister_as_ext3(); 5285ac27a0ecSDave Kleikamp destroy_inodecache(); 5286ac27a0ecSDave Kleikamp out1: 52879c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 52885dabfc78STheodore Ts'o ext4_exit_mballoc(); 52899c191f70ST Makphaibulchoke out2: 5290b5799018STheodore Ts'o ext4_exit_sysfs(); 5291b5799018STheodore Ts'o out3: 5292dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5293b5799018STheodore Ts'o out4: 52945dabfc78STheodore Ts'o ext4_exit_pageio(); 5295b5799018STheodore Ts'o out5: 529651865fdaSZheng Liu ext4_exit_es(); 529751865fdaSZheng Liu 5298ac27a0ecSDave Kleikamp return err; 5299ac27a0ecSDave Kleikamp } 5300ac27a0ecSDave Kleikamp 53015dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5302ac27a0ecSDave Kleikamp { 5303e298e73bSChao Yu ext4_exit_crypto(); 5304bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 530524b58424STheodore Ts'o unregister_as_ext2(); 530624b58424STheodore Ts'o unregister_as_ext3(); 530703010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5308ac27a0ecSDave Kleikamp destroy_inodecache(); 53095dabfc78STheodore Ts'o ext4_exit_mballoc(); 5310b5799018STheodore Ts'o ext4_exit_sysfs(); 53115dabfc78STheodore Ts'o ext4_exit_system_zone(); 53125dabfc78STheodore Ts'o ext4_exit_pageio(); 5313dd12ed14SEric Sandeen ext4_exit_es(); 5314ac27a0ecSDave Kleikamp } 5315ac27a0ecSDave Kleikamp 5316ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 531783982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5318ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 53195dabfc78STheodore Ts'o module_init(ext4_init_fs) 53205dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5321