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> 27ac27a0ecSDave Kleikamp #include <linux/parser.h> 28ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 29a5694255SChristoph Hellwig #include <linux/exportfs.h> 30ac27a0ecSDave Kleikamp #include <linux/vfs.h> 31ac27a0ecSDave Kleikamp #include <linux/random.h> 32ac27a0ecSDave Kleikamp #include <linux/mount.h> 33ac27a0ecSDave Kleikamp #include <linux/namei.h> 34ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 35ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 369f6200bbSTheodore Ts'o #include <linux/proc_fs.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 561f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 573197ebdbSTheodore Ts'o static struct kset *ext4_kset; 580b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 590b75a840SLukas Czerner static struct mutex ext4_li_mtx; 600b75a840SLukas Czerner static struct ext4_features *ext4_feat; 619c191f70ST Makphaibulchoke static int ext4_mballoc_ready; 629f6200bbSTheodore Ts'o 63617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 64ac27a0ecSDave Kleikamp unsigned long journal_devnum); 652adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 66e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 67617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 68617ba13bSMingming Cao struct ext4_super_block *es); 69617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 70617ba13bSMingming Cao struct ext4_super_block *es); 71617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 72617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 73617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 74c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 75c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 76152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 77152a0836SAl Viro const char *dev_name, void *data); 782035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 792035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 80d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 81bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 82bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 838f1f7453SEric Sandeen static void ext4_clear_request_list(void); 8427dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *, ext4_fsblk_t); 85ac27a0ecSDave Kleikamp 862035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 872035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 882035e776STheodore Ts'o .owner = THIS_MODULE, 892035e776STheodore Ts'o .name = "ext2", 902035e776STheodore Ts'o .mount = ext4_mount, 912035e776STheodore Ts'o .kill_sb = kill_block_super, 922035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 932035e776STheodore Ts'o }; 947f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 95fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 962035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 972035e776STheodore Ts'o #else 982035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 992035e776STheodore Ts'o #endif 1002035e776STheodore Ts'o 1012035e776STheodore Ts'o 102ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 103ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 104ba69f9abSJan Kara .owner = THIS_MODULE, 105ba69f9abSJan Kara .name = "ext3", 106152a0836SAl Viro .mount = ext4_mount, 107ba69f9abSJan Kara .kill_sb = kill_block_super, 108ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 109ba69f9abSJan Kara }; 1107f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 111fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 112ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 113ba69f9abSJan Kara #else 114ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 115ba69f9abSJan Kara #endif 116bd81d8eeSLaurent Vivier 117d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 118d25425f8SDarrick J. Wong struct ext4_super_block *es) 119d25425f8SDarrick J. Wong { 120d25425f8SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 121d25425f8SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 122d25425f8SDarrick J. Wong return 1; 123d25425f8SDarrick J. Wong 124d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 125d25425f8SDarrick J. Wong } 126d25425f8SDarrick J. Wong 127a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 128a9c47317SDarrick J. Wong struct ext4_super_block *es) 129a9c47317SDarrick J. Wong { 130a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 131a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 132a9c47317SDarrick J. Wong __u32 csum; 133a9c47317SDarrick J. Wong 134a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 135a9c47317SDarrick J. Wong 136a9c47317SDarrick J. Wong return cpu_to_le32(csum); 137a9c47317SDarrick J. Wong } 138a9c47317SDarrick J. Wong 139c197855eSStephen Hemminger static int ext4_superblock_csum_verify(struct super_block *sb, 140a9c47317SDarrick J. Wong struct ext4_super_block *es) 141a9c47317SDarrick J. Wong { 1429aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 143a9c47317SDarrick J. Wong return 1; 144a9c47317SDarrick J. Wong 145a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 146a9c47317SDarrick J. Wong } 147a9c47317SDarrick J. Wong 14806db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 149a9c47317SDarrick J. Wong { 15006db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 15106db49e6STheodore Ts'o 1529aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 153a9c47317SDarrick J. Wong return; 154a9c47317SDarrick J. Wong 155a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 156a9c47317SDarrick J. Wong } 157a9c47317SDarrick J. Wong 1589933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1599933fc0aSTheodore Ts'o { 1609933fc0aSTheodore Ts'o void *ret; 1619933fc0aSTheodore Ts'o 1628be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1639933fc0aSTheodore Ts'o if (!ret) 1649933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1659933fc0aSTheodore Ts'o return ret; 1669933fc0aSTheodore Ts'o } 1679933fc0aSTheodore Ts'o 1689933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1699933fc0aSTheodore Ts'o { 1709933fc0aSTheodore Ts'o void *ret; 1719933fc0aSTheodore Ts'o 1728be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1739933fc0aSTheodore Ts'o if (!ret) 1749933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1759933fc0aSTheodore Ts'o return ret; 1769933fc0aSTheodore Ts'o } 1779933fc0aSTheodore Ts'o 1788fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1798fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 180bd81d8eeSLaurent Vivier { 1813a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1828fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1838fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 184bd81d8eeSLaurent Vivier } 185bd81d8eeSLaurent Vivier 1868fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1878fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 188bd81d8eeSLaurent Vivier { 1895272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1908fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1918fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 192bd81d8eeSLaurent Vivier } 193bd81d8eeSLaurent Vivier 1948fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1958fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 196bd81d8eeSLaurent Vivier { 1975272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1988fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1998fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 200bd81d8eeSLaurent Vivier } 201bd81d8eeSLaurent Vivier 202021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(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_blocks_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_blocks_count_hi) << 16 : 0); 208560671a0SAneesh Kumar K.V } 209560671a0SAneesh Kumar K.V 210560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_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_free_inodes_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_free_inodes_count_hi) << 16 : 0); 216560671a0SAneesh Kumar K.V } 217560671a0SAneesh Kumar K.V 218560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_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_used_dirs_count_lo) | 222560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 223560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 224560671a0SAneesh Kumar K.V } 225560671a0SAneesh Kumar K.V 226560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 227560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 228560671a0SAneesh Kumar K.V { 229560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 230560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 231560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 232560671a0SAneesh Kumar K.V } 233560671a0SAneesh Kumar K.V 2348fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2358fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 236bd81d8eeSLaurent Vivier { 2373a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2388fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2398fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 240bd81d8eeSLaurent Vivier } 241bd81d8eeSLaurent Vivier 2428fadc143SAlexandre Ratchov void ext4_inode_bitmap_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_bitmap_lo = cpu_to_le32((u32)blk); 2468fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2478fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 248bd81d8eeSLaurent Vivier } 249bd81d8eeSLaurent Vivier 2508fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2518fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 252bd81d8eeSLaurent Vivier { 2535272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2548fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2558fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 256bd81d8eeSLaurent Vivier } 257bd81d8eeSLaurent Vivier 258021b65bbSTheodore Ts'o void ext4_free_group_clusters_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_blocks_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_blocks_count_hi = cpu_to_le16(count >> 16); 264560671a0SAneesh Kumar K.V } 265560671a0SAneesh Kumar K.V 266560671a0SAneesh Kumar K.V void ext4_free_inodes_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_free_inodes_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_free_inodes_count_hi = cpu_to_le16(count >> 16); 272560671a0SAneesh Kumar K.V } 273560671a0SAneesh Kumar K.V 274560671a0SAneesh Kumar K.V void ext4_used_dirs_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_used_dirs_count_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_used_dirs_count_hi = cpu_to_le16(count >> 16); 280560671a0SAneesh Kumar K.V } 281560671a0SAneesh Kumar K.V 282560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 283560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 284560671a0SAneesh Kumar K.V { 285560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 286560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 287560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 288560671a0SAneesh Kumar K.V } 289560671a0SAneesh Kumar K.V 290d3d1faf6SCurt Wohlgemuth 2911c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 2921c13d5c0STheodore Ts'o unsigned int line) 2931c13d5c0STheodore Ts'o { 2941c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 2951c13d5c0STheodore Ts'o 2961c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2971b46617bSTheodore Ts'o if (bdev_read_only(sb->s_bdev)) 2981b46617bSTheodore Ts'o return; 2991c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3001c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3011c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3021c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3031c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3041c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3051c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3061c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3071c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3081c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3091c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3101c13d5c0STheodore Ts'o } 31166e61a9eSTheodore Ts'o /* 31266e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 31366e61a9eSTheodore Ts'o * started already 31466e61a9eSTheodore Ts'o */ 31566e61a9eSTheodore Ts'o if (!es->s_error_count) 31666e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 317ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3181c13d5c0STheodore Ts'o } 3191c13d5c0STheodore Ts'o 3201c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3211c13d5c0STheodore Ts'o unsigned int line) 3221c13d5c0STheodore Ts'o { 3231c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3241c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3251c13d5c0STheodore Ts'o } 3261c13d5c0STheodore Ts'o 32718aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 32818aadd47SBobi Jam { 32918aadd47SBobi Jam struct super_block *sb = journal->j_private; 33018aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 33118aadd47SBobi Jam int error = is_journal_aborted(journal); 3325d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 33318aadd47SBobi Jam 3345d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 33518aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3365d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3375d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3385d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 33918aadd47SBobi Jam list_del_init(&jce->jce_list); 34018aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 34118aadd47SBobi Jam jce->jce_func(sb, jce, error); 34218aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 34318aadd47SBobi Jam } 34418aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 34518aadd47SBobi Jam } 3461c13d5c0STheodore Ts'o 347ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 348ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 349ac27a0ecSDave Kleikamp * 350ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 351617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 352ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 353ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 354ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 355ac27a0ecSDave Kleikamp * write out the superblock safely. 356ac27a0ecSDave Kleikamp * 357dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 358d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 359ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 360ac27a0ecSDave Kleikamp */ 361ac27a0ecSDave Kleikamp 362617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 363ac27a0ecSDave Kleikamp { 364ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 365ac27a0ecSDave Kleikamp return; 366ac27a0ecSDave Kleikamp 367ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 368617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 369ac27a0ecSDave Kleikamp 3704ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 371ac27a0ecSDave Kleikamp if (journal) 372dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 373ac27a0ecSDave Kleikamp } 374ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 375b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 3764418e141SDmitry Monakhov /* 3774418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 3784418e141SDmitry Monakhov * before ->s_flags update 3794418e141SDmitry Monakhov */ 3804418e141SDmitry Monakhov smp_wmb(); 381ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 382ac27a0ecSDave Kleikamp } 383ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 384617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 385ac27a0ecSDave Kleikamp sb->s_id); 386ac27a0ecSDave Kleikamp } 387ac27a0ecSDave Kleikamp 388efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 389efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 390efbed4dcSTheodore Ts'o "EXT4-fs error") 391efbed4dcSTheodore Ts'o 39212062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 393c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 394ac27a0ecSDave Kleikamp { 3950ff2ea7dSJoe Perches struct va_format vaf; 396ac27a0ecSDave Kleikamp va_list args; 397ac27a0ecSDave Kleikamp 398efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 399ac27a0ecSDave Kleikamp va_start(args, fmt); 4000ff2ea7dSJoe Perches vaf.fmt = fmt; 4010ff2ea7dSJoe Perches vaf.va = &args; 402efbed4dcSTheodore Ts'o printk(KERN_CRIT 403efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4040ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 405ac27a0ecSDave Kleikamp va_end(args); 406efbed4dcSTheodore Ts'o } 407f3fc0210STheodore Ts'o save_error_info(sb, function, line); 408617ba13bSMingming Cao ext4_handle_error(sb); 409ac27a0ecSDave Kleikamp } 410ac27a0ecSDave Kleikamp 411e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 412c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 413273df556SFrank Mayhar const char *fmt, ...) 414273df556SFrank Mayhar { 415273df556SFrank Mayhar va_list args; 416f7c21177STheodore Ts'o struct va_format vaf; 4171c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 418273df556SFrank Mayhar 4191c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4201c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 421efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 422273df556SFrank Mayhar va_start(args, fmt); 423f7c21177STheodore Ts'o vaf.fmt = fmt; 424f7c21177STheodore Ts'o vaf.va = &args; 425c398eda0STheodore Ts'o if (block) 426d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 427d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 428d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 429d9ee81daSJoe Perches block, current->comm, &vaf); 430d9ee81daSJoe Perches else 431d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 432d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 433d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 434d9ee81daSJoe Perches current->comm, &vaf); 435273df556SFrank Mayhar va_end(args); 436efbed4dcSTheodore Ts'o } 437efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 438273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 439273df556SFrank Mayhar } 440273df556SFrank Mayhar 441e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 442f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 443f7c21177STheodore Ts'o const char *fmt, ...) 444273df556SFrank Mayhar { 445273df556SFrank Mayhar va_list args; 446f7c21177STheodore Ts'o struct va_format vaf; 4471c13d5c0STheodore Ts'o struct ext4_super_block *es; 448496ad9aaSAl Viro struct inode *inode = file_inode(file); 449273df556SFrank Mayhar char pathname[80], *path; 450273df556SFrank Mayhar 4511c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4521c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 453efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 454273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 455f9a62d09SDan Carpenter if (IS_ERR(path)) 456273df556SFrank Mayhar path = "(unknown)"; 457f7c21177STheodore Ts'o va_start(args, fmt); 458f7c21177STheodore Ts'o vaf.fmt = fmt; 459f7c21177STheodore Ts'o vaf.va = &args; 460d9ee81daSJoe Perches if (block) 461d9ee81daSJoe Perches printk(KERN_CRIT 462d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 463d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 464d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 465d9ee81daSJoe Perches block, current->comm, path, &vaf); 466d9ee81daSJoe Perches else 467d9ee81daSJoe Perches printk(KERN_CRIT 468d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 469d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 470d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 471d9ee81daSJoe Perches current->comm, path, &vaf); 472273df556SFrank Mayhar va_end(args); 473efbed4dcSTheodore Ts'o } 474efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 475273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 476273df556SFrank Mayhar } 477273df556SFrank Mayhar 478722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 479ac27a0ecSDave Kleikamp char nbuf[16]) 480ac27a0ecSDave Kleikamp { 481ac27a0ecSDave Kleikamp char *errstr = NULL; 482ac27a0ecSDave Kleikamp 483ac27a0ecSDave Kleikamp switch (errno) { 484ac27a0ecSDave Kleikamp case -EIO: 485ac27a0ecSDave Kleikamp errstr = "IO failure"; 486ac27a0ecSDave Kleikamp break; 487ac27a0ecSDave Kleikamp case -ENOMEM: 488ac27a0ecSDave Kleikamp errstr = "Out of memory"; 489ac27a0ecSDave Kleikamp break; 490ac27a0ecSDave Kleikamp case -EROFS: 49178f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 49278f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 493ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 494ac27a0ecSDave Kleikamp else 495ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 496ac27a0ecSDave Kleikamp break; 497ac27a0ecSDave Kleikamp default: 498ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 499ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 500ac27a0ecSDave Kleikamp * NULL. */ 501ac27a0ecSDave Kleikamp if (nbuf) { 502ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 503ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 504ac27a0ecSDave Kleikamp errstr = nbuf; 505ac27a0ecSDave Kleikamp } 506ac27a0ecSDave Kleikamp break; 507ac27a0ecSDave Kleikamp } 508ac27a0ecSDave Kleikamp 509ac27a0ecSDave Kleikamp return errstr; 510ac27a0ecSDave Kleikamp } 511ac27a0ecSDave Kleikamp 512617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 513ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 514ac27a0ecSDave Kleikamp 515c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 516c398eda0STheodore Ts'o unsigned int line, int errno) 517ac27a0ecSDave Kleikamp { 518ac27a0ecSDave Kleikamp char nbuf[16]; 519ac27a0ecSDave Kleikamp const char *errstr; 520ac27a0ecSDave Kleikamp 521ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 522ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 523ac27a0ecSDave Kleikamp * an error. */ 524ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 525ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 526ac27a0ecSDave Kleikamp return; 527ac27a0ecSDave Kleikamp 528efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 529617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 530c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 531c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 532efbed4dcSTheodore Ts'o } 533ac27a0ecSDave Kleikamp 534efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 535617ba13bSMingming Cao ext4_handle_error(sb); 536ac27a0ecSDave Kleikamp } 537ac27a0ecSDave Kleikamp 538ac27a0ecSDave Kleikamp /* 539617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 540ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 541ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 542ac27a0ecSDave Kleikamp * 543ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 544ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 545ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 546ac27a0ecSDave Kleikamp */ 547ac27a0ecSDave Kleikamp 548c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 549c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 550ac27a0ecSDave Kleikamp { 551ac27a0ecSDave Kleikamp va_list args; 552ac27a0ecSDave Kleikamp 5531c13d5c0STheodore Ts'o save_error_info(sb, function, line); 554ac27a0ecSDave Kleikamp va_start(args, fmt); 555c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 556c398eda0STheodore Ts'o function, line); 557ac27a0ecSDave Kleikamp vprintk(fmt, args); 558ac27a0ecSDave Kleikamp printk("\n"); 559ac27a0ecSDave Kleikamp va_end(args); 560ac27a0ecSDave Kleikamp 5611c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 562b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 5634ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 5644418e141SDmitry Monakhov /* 5654418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 5664418e141SDmitry Monakhov * before ->s_flags update 5674418e141SDmitry Monakhov */ 5684418e141SDmitry Monakhov smp_wmb(); 5694418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 570ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 571dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5721c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5731c13d5c0STheodore Ts'o } 5741c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5751c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 576ac27a0ecSDave Kleikamp } 577ac27a0ecSDave Kleikamp 578e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 579e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 580b31e1552SEric Sandeen { 5810ff2ea7dSJoe Perches struct va_format vaf; 582b31e1552SEric Sandeen va_list args; 583b31e1552SEric Sandeen 584efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 585efbed4dcSTheodore Ts'o return; 586efbed4dcSTheodore Ts'o 587b31e1552SEric Sandeen va_start(args, fmt); 5880ff2ea7dSJoe Perches vaf.fmt = fmt; 5890ff2ea7dSJoe Perches vaf.va = &args; 5900ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 591b31e1552SEric Sandeen va_end(args); 592b31e1552SEric Sandeen } 593b31e1552SEric Sandeen 594b03a2f7eSAndreas Dilger #define ext4_warning_ratelimit(sb) \ 595b03a2f7eSAndreas Dilger ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ 596b03a2f7eSAndreas Dilger "EXT4-fs warning") 597b03a2f7eSAndreas Dilger 59812062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 599c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 600ac27a0ecSDave Kleikamp { 6010ff2ea7dSJoe Perches struct va_format vaf; 602ac27a0ecSDave Kleikamp va_list args; 603ac27a0ecSDave Kleikamp 604b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 605efbed4dcSTheodore Ts'o return; 606efbed4dcSTheodore Ts'o 607ac27a0ecSDave Kleikamp va_start(args, fmt); 6080ff2ea7dSJoe Perches vaf.fmt = fmt; 6090ff2ea7dSJoe Perches vaf.va = &args; 6100ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6110ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 612ac27a0ecSDave Kleikamp va_end(args); 613ac27a0ecSDave Kleikamp } 614ac27a0ecSDave Kleikamp 615b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 616b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 617b03a2f7eSAndreas Dilger { 618b03a2f7eSAndreas Dilger struct va_format vaf; 619b03a2f7eSAndreas Dilger va_list args; 620b03a2f7eSAndreas Dilger 621b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 622b03a2f7eSAndreas Dilger return; 623b03a2f7eSAndreas Dilger 624b03a2f7eSAndreas Dilger va_start(args, fmt); 625b03a2f7eSAndreas Dilger vaf.fmt = fmt; 626b03a2f7eSAndreas Dilger vaf.va = &args; 627b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 628b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 629b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 630b03a2f7eSAndreas Dilger va_end(args); 631b03a2f7eSAndreas Dilger } 632b03a2f7eSAndreas Dilger 633e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 634e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 635e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 636e29136f8STheodore Ts'o const char *fmt, ...) 6375d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6385d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6395d1b1b3fSAneesh Kumar K.V { 6400ff2ea7dSJoe Perches struct va_format vaf; 6415d1b1b3fSAneesh Kumar K.V va_list args; 6425d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6435d1b1b3fSAneesh Kumar K.V 6441c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6451c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6461c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6470ff2ea7dSJoe Perches 648efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 6495d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6500ff2ea7dSJoe Perches vaf.fmt = fmt; 6510ff2ea7dSJoe Perches vaf.va = &args; 65221149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 653e29136f8STheodore Ts'o sb->s_id, function, line, grp); 654e29136f8STheodore Ts'o if (ino) 6550ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 656e29136f8STheodore Ts'o if (block) 657efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 658efbed4dcSTheodore Ts'o (unsigned long long) block); 6590ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6605d1b1b3fSAneesh Kumar K.V va_end(args); 661efbed4dcSTheodore Ts'o } 6625d1b1b3fSAneesh Kumar K.V 6635d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 664e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6655d1b1b3fSAneesh Kumar K.V return; 6665d1b1b3fSAneesh Kumar K.V } 6671c13d5c0STheodore Ts'o 6685d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6695d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6705d1b1b3fSAneesh Kumar K.V /* 6715d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6725d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6735d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6745d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6755d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 67625985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 6775d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6785d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6795d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6805d1b1b3fSAneesh Kumar K.V */ 6815d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6825d1b1b3fSAneesh Kumar K.V return; 6835d1b1b3fSAneesh Kumar K.V } 6845d1b1b3fSAneesh Kumar K.V 685617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 686ac27a0ecSDave Kleikamp { 687617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 688ac27a0ecSDave Kleikamp 689617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 690ac27a0ecSDave Kleikamp return; 691ac27a0ecSDave Kleikamp 69212062dddSEric Sandeen ext4_warning(sb, 693ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 694ac27a0ecSDave Kleikamp "running e2fsck is recommended", 695617ba13bSMingming Cao EXT4_DYNAMIC_REV); 696ac27a0ecSDave Kleikamp 697617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 698617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 699617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 700ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 701ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 702ac27a0ecSDave Kleikamp 703ac27a0ecSDave Kleikamp /* 704ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 705ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 706ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 707ac27a0ecSDave Kleikamp */ 708ac27a0ecSDave Kleikamp } 709ac27a0ecSDave Kleikamp 710ac27a0ecSDave Kleikamp /* 711ac27a0ecSDave Kleikamp * Open the external journal device 712ac27a0ecSDave Kleikamp */ 713b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 714ac27a0ecSDave Kleikamp { 715ac27a0ecSDave Kleikamp struct block_device *bdev; 716ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 717ac27a0ecSDave Kleikamp 718d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 719ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 720ac27a0ecSDave Kleikamp goto fail; 721ac27a0ecSDave Kleikamp return bdev; 722ac27a0ecSDave Kleikamp 723ac27a0ecSDave Kleikamp fail: 724b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 725ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 726ac27a0ecSDave Kleikamp return NULL; 727ac27a0ecSDave Kleikamp } 728ac27a0ecSDave Kleikamp 729ac27a0ecSDave Kleikamp /* 730ac27a0ecSDave Kleikamp * Release the journal device 731ac27a0ecSDave Kleikamp */ 7324385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 733ac27a0ecSDave Kleikamp { 7344385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 735ac27a0ecSDave Kleikamp } 736ac27a0ecSDave Kleikamp 7374385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 738ac27a0ecSDave Kleikamp { 739ac27a0ecSDave Kleikamp struct block_device *bdev; 740ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 741ac27a0ecSDave Kleikamp if (bdev) { 7424385bab1SAl Viro ext4_blkdev_put(bdev); 743ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 744ac27a0ecSDave Kleikamp } 745ac27a0ecSDave Kleikamp } 746ac27a0ecSDave Kleikamp 747ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 748ac27a0ecSDave Kleikamp { 749617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 750ac27a0ecSDave Kleikamp } 751ac27a0ecSDave Kleikamp 752617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 753ac27a0ecSDave Kleikamp { 754ac27a0ecSDave Kleikamp struct list_head *l; 755ac27a0ecSDave Kleikamp 756b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 757ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 758ac27a0ecSDave Kleikamp 759ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 760ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 761ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 762ac27a0ecSDave Kleikamp printk(KERN_ERR " " 763ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 764ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 765ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 766ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 767ac27a0ecSDave Kleikamp } 768ac27a0ecSDave Kleikamp } 769ac27a0ecSDave Kleikamp 770617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 771ac27a0ecSDave Kleikamp { 772617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 773617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 774ef2cabf7SHidehiro Kawai int i, err; 775ac27a0ecSDave Kleikamp 776857ac889SLukas Czerner ext4_unregister_li_request(sb); 777e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 778e0ccfd95SChristoph Hellwig 7792e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 7802e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 7814c0425ffSMingming Cao 7820390131bSFrank Mayhar if (sbi->s_journal) { 783ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 78447b4a50bSJan Kara sbi->s_journal = NULL; 785ef2cabf7SHidehiro Kawai if (err < 0) 786c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7870390131bSFrank Mayhar } 788d4edac31SJosef Bacik 789d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 7909105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 791d4edac31SJosef Bacik ext4_release_system_zone(sb); 792d4edac31SJosef Bacik ext4_mb_release(sb); 793d4edac31SJosef Bacik ext4_ext_release(sb); 794d4edac31SJosef Bacik ext4_xattr_put_super(sb); 795d4edac31SJosef Bacik 796ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 797617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 798ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 799ac27a0ecSDave Kleikamp } 80058c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 801a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 802a8e25a83SArtem Bityutskiy 803240799cdSTheodore Ts'o if (sbi->s_proc) { 80466acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 8059f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 806240799cdSTheodore Ts'o } 8073197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 808ac27a0ecSDave Kleikamp 809ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 810ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 811b93b41d4SAl Viro kvfree(sbi->s_group_desc); 812b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 81357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 814ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 815ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 81657042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 817ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 818ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 819a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 820ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 821ac27a0ecSDave Kleikamp #endif 822ac27a0ecSDave Kleikamp 823ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 824ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 825ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 826ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 827ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 828ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 829ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 830ac27a0ecSDave Kleikamp 83189d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 832f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 833ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 834ac27a0ecSDave Kleikamp /* 835ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 836ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 837ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 838ac27a0ecSDave Kleikamp */ 839ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 840f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 841617ba13bSMingming Cao ext4_blkdev_remove(sbi); 842ac27a0ecSDave Kleikamp } 8439c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 8449c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 8459c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 8469c191f70ST Makphaibulchoke } 847c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 848c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 849ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8503197ebdbSTheodore Ts'o /* 8513197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8523197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8533197ebdbSTheodore Ts'o */ 8543197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8553197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 8560441984aSDarrick J. Wong if (sbi->s_chksum_driver) 8570441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 858705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 859ac27a0ecSDave Kleikamp kfree(sbi); 860ac27a0ecSDave Kleikamp } 861ac27a0ecSDave Kleikamp 862e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 863ac27a0ecSDave Kleikamp 864ac27a0ecSDave Kleikamp /* 865ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 866ac27a0ecSDave Kleikamp */ 867617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 868ac27a0ecSDave Kleikamp { 869617ba13bSMingming Cao struct ext4_inode_info *ei; 870ac27a0ecSDave Kleikamp 871e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 872ac27a0ecSDave Kleikamp if (!ei) 873ac27a0ecSDave Kleikamp return NULL; 8740b8e58a1SAndreas Dilger 875ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 876202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 877c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 878c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8799a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 8809a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 881edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 882eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 883edaa53caSZheng Liu ei->i_es_shk_nr = 0; 884dd475925SJan Kara ei->i_es_shrink_lblk = 0; 885d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 886d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 887d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8889d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 8897e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 890d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 891a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 892a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 89396c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 894a9e7f447SDmitry Monakhov #endif 8958aefcd55STheodore Ts'o ei->jinode = NULL; 8962e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 897744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 898b436b9beSJan Kara ei->i_sync_tid = 0; 899b436b9beSJan Kara ei->i_datasync_tid = 0; 900f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 901e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9022e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 903b30ab0e0SMichael Halcrow #ifdef CONFIG_EXT4_FS_ENCRYPTION 904b7236e21STheodore Ts'o ei->i_crypt_info = NULL; 905b30ab0e0SMichael Halcrow #endif 906ac27a0ecSDave Kleikamp return &ei->vfs_inode; 907ac27a0ecSDave Kleikamp } 908ac27a0ecSDave Kleikamp 9097ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9107ff9c073STheodore Ts'o { 9117ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9127ff9c073STheodore Ts'o 9137ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9147ff9c073STheodore Ts'o return drop; 9157ff9c073STheodore Ts'o } 9167ff9c073STheodore Ts'o 917fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 918fa0d7e3dSNick Piggin { 919fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 920fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 921fa0d7e3dSNick Piggin } 922fa0d7e3dSNick Piggin 923617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 924ac27a0ecSDave Kleikamp { 9259f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 926b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 927b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 928b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9299f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9309f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9319f7dd93dSVasily Averin true); 9329f7dd93dSVasily Averin dump_stack(); 9339f7dd93dSVasily Averin } 934fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 935ac27a0ecSDave Kleikamp } 936ac27a0ecSDave Kleikamp 93751cc5068SAlexey Dobriyan static void init_once(void *foo) 938ac27a0ecSDave Kleikamp { 939617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 940ac27a0ecSDave Kleikamp 941ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 942ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9430e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 944ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 945ac27a0ecSDave Kleikamp } 946ac27a0ecSDave Kleikamp 947e67bc2b3SFabian Frederick static int __init init_inodecache(void) 948ac27a0ecSDave Kleikamp { 949617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 950617ba13bSMingming Cao sizeof(struct ext4_inode_info), 951ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 952ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 95320c2df83SPaul Mundt init_once); 954617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 955ac27a0ecSDave Kleikamp return -ENOMEM; 956ac27a0ecSDave Kleikamp return 0; 957ac27a0ecSDave Kleikamp } 958ac27a0ecSDave Kleikamp 959ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 960ac27a0ecSDave Kleikamp { 9618c0a8537SKirill A. Shutemov /* 9628c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 9638c0a8537SKirill A. Shutemov * destroy cache. 9648c0a8537SKirill A. Shutemov */ 9658c0a8537SKirill A. Shutemov rcu_barrier(); 966617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 967ac27a0ecSDave Kleikamp } 968ac27a0ecSDave Kleikamp 9690930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 970ac27a0ecSDave Kleikamp { 9710930fcc1SAl Viro invalidate_inode_buffers(inode); 972dbd5768fSJan Kara clear_inode(inode); 9739f754758SChristoph Hellwig dquot_drop(inode); 974c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 97551865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 9768aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9778aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9788aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9798aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9808aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9818aefcd55STheodore Ts'o } 982b7236e21STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 983b7236e21STheodore Ts'o if (EXT4_I(inode)->i_crypt_info) 984c936e1ecSTheodore Ts'o ext4_free_encryption_info(inode, EXT4_I(inode)->i_crypt_info); 985b7236e21STheodore Ts'o #endif 986ac27a0ecSDave Kleikamp } 987ac27a0ecSDave Kleikamp 9881b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9891b961ac0SChristoph Hellwig u64 ino, u32 generation) 990ac27a0ecSDave Kleikamp { 991ac27a0ecSDave Kleikamp struct inode *inode; 992ac27a0ecSDave Kleikamp 993617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 994ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 995617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 996ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 997ac27a0ecSDave Kleikamp 998ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 999ac27a0ecSDave Kleikamp * 1000617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1001ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1002ac27a0ecSDave Kleikamp * 1003ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1004ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1005ac27a0ecSDave Kleikamp */ 1006f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 10071d1fe1eeSDavid Howells if (IS_ERR(inode)) 10081d1fe1eeSDavid Howells return ERR_CAST(inode); 10091d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1010ac27a0ecSDave Kleikamp iput(inode); 1011ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1012ac27a0ecSDave Kleikamp } 10131b961ac0SChristoph Hellwig 10141b961ac0SChristoph Hellwig return inode; 1015ac27a0ecSDave Kleikamp } 10161b961ac0SChristoph Hellwig 10171b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10181b961ac0SChristoph Hellwig int fh_len, int fh_type) 10191b961ac0SChristoph Hellwig { 10201b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10211b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10221b961ac0SChristoph Hellwig } 10231b961ac0SChristoph Hellwig 10241b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10251b961ac0SChristoph Hellwig int fh_len, int fh_type) 10261b961ac0SChristoph Hellwig { 10271b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10281b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1029ac27a0ecSDave Kleikamp } 1030ac27a0ecSDave Kleikamp 1031c39a7f84SToshiyuki Okajima /* 1032c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1033c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1034c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1035c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1036c39a7f84SToshiyuki Okajima */ 10370b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10380b8e58a1SAndreas Dilger gfp_t wait) 1039c39a7f84SToshiyuki Okajima { 1040c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1041c39a7f84SToshiyuki Okajima 1042c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1043c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1044c39a7f84SToshiyuki Okajima return 0; 1045c39a7f84SToshiyuki Okajima if (journal) 1046c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1047c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1048c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1049c39a7f84SToshiyuki Okajima } 1050c39a7f84SToshiyuki Okajima 1051ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1052ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1053ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1054ac27a0ecSDave Kleikamp 1055617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1056617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1057617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1058617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1059617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10606f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1061f00c9e44SJan Kara struct path *path); 1062ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1063617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1064617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1065ac27a0ecSDave Kleikamp size_t len, loff_t off); 1066617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1067ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 10687c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 10697c319d32SAditya Kali unsigned int flags); 10707c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1071ac27a0ecSDave Kleikamp 107296c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 107396c7e0d9SJan Kara { 107496c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 107596c7e0d9SJan Kara } 107696c7e0d9SJan Kara 107761e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 107860e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1079617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1080617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1081617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1082617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1083a5b5ee32SJan Kara .write_info = ext4_write_info, 1084a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1085a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1086ac27a0ecSDave Kleikamp }; 1087ac27a0ecSDave Kleikamp 10880d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1089617ba13bSMingming Cao .quota_on = ext4_quota_on, 1090ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1091287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 10920a240339SJan Kara .get_state = dquot_get_state, 1093287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1094287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1095287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1096ac27a0ecSDave Kleikamp }; 1097ac27a0ecSDave Kleikamp #endif 1098ac27a0ecSDave Kleikamp 1099ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1100617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1101617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1102617ba13bSMingming Cao .write_inode = ext4_write_inode, 1103617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11047ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11050930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1106617ba13bSMingming Cao .put_super = ext4_put_super, 1107617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1108c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1109c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1110617ba13bSMingming Cao .statfs = ext4_statfs, 1111617ba13bSMingming Cao .remount_fs = ext4_remount, 1112617ba13bSMingming Cao .show_options = ext4_show_options, 1113ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1114617ba13bSMingming Cao .quota_read = ext4_quota_read, 1115617ba13bSMingming Cao .quota_write = ext4_quota_write, 111696c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1117ac27a0ecSDave Kleikamp #endif 1118c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1119ac27a0ecSDave Kleikamp }; 1120ac27a0ecSDave Kleikamp 112139655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11221b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11231b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1124617ba13bSMingming Cao .get_parent = ext4_get_parent, 1125ac27a0ecSDave Kleikamp }; 1126ac27a0ecSDave Kleikamp 1127ac27a0ecSDave Kleikamp enum { 1128ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1129ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 113072578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1131ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 113272578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1133ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1134ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1135ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 11366ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1137ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11385a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1139ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1140923ae0ffSRoss Zwisler Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_dax, 11411449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 1142a26f4992STheodore Ts'o Opt_lazytime, Opt_nolazytime, 11431449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11445328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1145744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1146fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1147c6d3d56dSDarrick J. Wong Opt_max_dir_size_kb, Opt_nojournal_checksum, 1148ac27a0ecSDave Kleikamp }; 1149ac27a0ecSDave Kleikamp 1150a447c093SSteven Whitehouse static const match_table_t tokens = { 1151ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1152ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1153ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1154ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1155ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1156ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1157ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1158ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1159ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1160ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1161ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1162ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1163ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1164ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 116572578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 116672578c33STheodore Ts'o {Opt_removed, "orlov"}, 1167ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1168ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1169ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1170ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1171e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11725a916be1STheodore Ts'o {Opt_noload, "noload"}, 117372578c33STheodore Ts'o {Opt_removed, "nobh"}, 117472578c33STheodore Ts'o {Opt_removed, "bh"}, 1175ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 117630773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 117730773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1178ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1179ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1180818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1181c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1182818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1183ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1184ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1185ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1186ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11875bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11885bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1189ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1190ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1191ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1192ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1193ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1194ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 11955a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1196ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1197ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1198ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1199ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1200ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 120106705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 120206705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 120325ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1204923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1205c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 120664769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1207a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1208a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1209dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 121036ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 121136ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 12126fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12136fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1214240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1215b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1216afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 121706705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 121806705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1219744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1220744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12215328e635SEric Sandeen {Opt_discard, "discard"}, 12225328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1223fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1224fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1225fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1226df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 12276ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1228c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1229c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1230c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1231c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1232c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1233f3f12faaSJosef Bacik {Opt_err, NULL}, 1234ac27a0ecSDave Kleikamp }; 1235ac27a0ecSDave Kleikamp 1236617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1237ac27a0ecSDave Kleikamp { 1238617ba13bSMingming Cao ext4_fsblk_t sb_block; 1239ac27a0ecSDave Kleikamp char *options = (char *) *data; 1240ac27a0ecSDave Kleikamp 1241ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1242ac27a0ecSDave Kleikamp return 1; /* Default location */ 12430b8e58a1SAndreas Dilger 1244ac27a0ecSDave Kleikamp options += 3; 12450b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1246ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1247ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12484776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1249ac27a0ecSDave Kleikamp (char *) *data); 1250ac27a0ecSDave Kleikamp return 1; 1251ac27a0ecSDave Kleikamp } 1252ac27a0ecSDave Kleikamp if (*options == ',') 1253ac27a0ecSDave Kleikamp options++; 1254ac27a0ecSDave Kleikamp *data = (void *) options; 12550b8e58a1SAndreas Dilger 1256ac27a0ecSDave Kleikamp return sb_block; 1257ac27a0ecSDave Kleikamp } 1258ac27a0ecSDave Kleikamp 1259b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1260437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1261437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1262b3881f74STheodore Ts'o 126356c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 126456c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 126556c50f11SDmitry Monakhov { 126656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 126756c50f11SDmitry Monakhov char *qname; 126803dafb5fSChen Gang int ret = -1; 126956c50f11SDmitry Monakhov 127056c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 127156c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 127256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127356c50f11SDmitry Monakhov "Cannot change journaled " 127456c50f11SDmitry Monakhov "quota options when quota turned on"); 127557f73c2cSTheodore Ts'o return -1; 127656c50f11SDmitry Monakhov } 1277262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1278262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1279262b4662SJan Kara "when QUOTA feature is enabled"); 1280262b4662SJan Kara return -1; 1281262b4662SJan Kara } 128256c50f11SDmitry Monakhov qname = match_strdup(args); 128356c50f11SDmitry Monakhov if (!qname) { 128456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128556c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 128657f73c2cSTheodore Ts'o return -1; 128756c50f11SDmitry Monakhov } 128803dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 128903dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 129003dafb5fSChen Gang ret = 1; 129103dafb5fSChen Gang else 129256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129303dafb5fSChen Gang "%s quota file already specified", 129403dafb5fSChen Gang QTYPE2NAME(qtype)); 129503dafb5fSChen Gang goto errout; 129656c50f11SDmitry Monakhov } 129703dafb5fSChen Gang if (strchr(qname, '/')) { 129856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129956c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 130003dafb5fSChen Gang goto errout; 130156c50f11SDmitry Monakhov } 130203dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1303fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 130456c50f11SDmitry Monakhov return 1; 130503dafb5fSChen Gang errout: 130603dafb5fSChen Gang kfree(qname); 130703dafb5fSChen Gang return ret; 130856c50f11SDmitry Monakhov } 130956c50f11SDmitry Monakhov 131056c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 131156c50f11SDmitry Monakhov { 131256c50f11SDmitry Monakhov 131356c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 131456c50f11SDmitry Monakhov 131556c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 131656c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 131756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 131856c50f11SDmitry Monakhov " when quota turned on"); 131957f73c2cSTheodore Ts'o return -1; 132056c50f11SDmitry Monakhov } 132103dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 132256c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 132356c50f11SDmitry Monakhov return 1; 132456c50f11SDmitry Monakhov } 132556c50f11SDmitry Monakhov #endif 132656c50f11SDmitry Monakhov 132726092bf5STheodore Ts'o #define MOPT_SET 0x0001 132826092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 132926092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 133026092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 133126092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 133226092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 133326092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 133426092bf5STheodore Ts'o #define MOPT_Q 0 133526092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 133626092bf5STheodore Ts'o #else 133726092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 133826092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 133926092bf5STheodore Ts'o #endif 134026092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13418dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13428dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13438dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1344ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 134526092bf5STheodore Ts'o 134626092bf5STheodore Ts'o static const struct mount_opts { 134726092bf5STheodore Ts'o int token; 134826092bf5STheodore Ts'o int mount_opt; 134926092bf5STheodore Ts'o int flags; 135026092bf5STheodore Ts'o } ext4_mount_opts[] = { 135126092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 135226092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 135326092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 135426092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 135526092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 135626092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13578dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13588dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13598dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13608dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 136126092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 136226092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13638dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13648dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13658dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 136659d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1367c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1368c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 13698dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 13708dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 137126092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13728dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 13738dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13748dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 137526092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 137626092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 137726092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13788dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13798dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13808dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13818dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 138226092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 138326092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 138426092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 138526092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 138626092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 138726092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 138826092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 138926092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 139026092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 139126092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1392923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 139326092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 13940efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 13950efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 13960efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 1397ad4eec61SEric Sandeen {Opt_journal_path, 0, MOPT_STRING}, 13980efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 13998dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14008dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14018dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 14028dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 140326092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 140426092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 140526092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 140626092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 140726092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 140826092bf5STheodore Ts'o #else 140926092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 141026092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 141126092bf5STheodore Ts'o #endif 141226092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 141326092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 141426092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 141526092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 141626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 141726092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 141826092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 141926092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 142026092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 142126092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 142226092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 142326092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 142426092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 142526092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 142626092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 142726092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1428df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 14296ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 143026092bf5STheodore Ts'o {Opt_err, 0, 0} 143126092bf5STheodore Ts'o }; 143226092bf5STheodore Ts'o 143326092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 143426092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 143526092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 143626092bf5STheodore Ts'o { 143726092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 143826092bf5STheodore Ts'o const struct mount_opts *m; 143908cefc7aSEric W. Biederman kuid_t uid; 144008cefc7aSEric W. Biederman kgid_t gid; 144126092bf5STheodore Ts'o int arg = 0; 144226092bf5STheodore Ts'o 144357f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 144457f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 144557f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 144657f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 144757f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 144857f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 144957f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 145057f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 145157f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 145257f73c2cSTheodore Ts'o #endif 145326092bf5STheodore Ts'o switch (token) { 1454f7048605STheodore Ts'o case Opt_noacl: 1455f7048605STheodore Ts'o case Opt_nouser_xattr: 1456f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1457f7048605STheodore Ts'o break; 145826092bf5STheodore Ts'o case Opt_sb: 145926092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 146026092bf5STheodore Ts'o case Opt_removed: 14615f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 146226092bf5STheodore Ts'o return 1; 146326092bf5STheodore Ts'o case Opt_abort: 146426092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 146526092bf5STheodore Ts'o return 1; 146626092bf5STheodore Ts'o case Opt_i_version: 146726092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 146826092bf5STheodore Ts'o return 1; 1469a26f4992STheodore Ts'o case Opt_lazytime: 1470a26f4992STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 1471a26f4992STheodore Ts'o return 1; 1472a26f4992STheodore Ts'o case Opt_nolazytime: 1473a26f4992STheodore Ts'o sb->s_flags &= ~MS_LAZYTIME; 1474a26f4992STheodore Ts'o return 1; 147526092bf5STheodore Ts'o } 147626092bf5STheodore Ts'o 14775f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14785f3633e3SJan Kara if (token == m->token) 14795f3633e3SJan Kara break; 14805f3633e3SJan Kara 14815f3633e3SJan Kara if (m->token == Opt_err) { 14825f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 14835f3633e3SJan Kara "or missing value", opt); 14845f3633e3SJan Kara return -1; 14855f3633e3SJan Kara } 14865f3633e3SJan Kara 14878dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 14888dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14898dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 14908dc0aa8cSTheodore Ts'o return -1; 14918dc0aa8cSTheodore Ts'o } 14928dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 14938dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14948dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 14958dc0aa8cSTheodore Ts'o return -1; 14968dc0aa8cSTheodore Ts'o } 14978dc0aa8cSTheodore Ts'o 1498ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 14990efb3b23SJan Kara return -1; 150026092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 150126092bf5STheodore Ts'o return -1; 150226092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 150326092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 150426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 150526092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 150626092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 150726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 150826092bf5STheodore Ts'o "options when quota turned on"); 150926092bf5STheodore Ts'o return -1; 151026092bf5STheodore Ts'o } 151126092bf5STheodore Ts'o 151226092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 151326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 151426092bf5STheodore Ts'o } else if (token == Opt_commit) { 151526092bf5STheodore Ts'o if (arg == 0) 151626092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 151726092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 151826092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 151926092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 152026092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 152126092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 152226092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1523e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1524e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1525e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1526e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 152726092bf5STheodore Ts'o return -1; 152826092bf5STheodore Ts'o } 152926092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 153026092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 153126092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 153226092bf5STheodore Ts'o if (!args->from) 153326092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 153426092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1535df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1536df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 153726092bf5STheodore Ts'o } else if (token == Opt_stripe) { 153826092bf5STheodore Ts'o sbi->s_stripe = arg; 15390efb3b23SJan Kara } else if (token == Opt_resuid) { 15400efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15410efb3b23SJan Kara if (!uid_valid(uid)) { 15425f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15430efb3b23SJan Kara return -1; 15440efb3b23SJan Kara } 15450efb3b23SJan Kara sbi->s_resuid = uid; 15460efb3b23SJan Kara } else if (token == Opt_resgid) { 15470efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15480efb3b23SJan Kara if (!gid_valid(gid)) { 15495f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15500efb3b23SJan Kara return -1; 15510efb3b23SJan Kara } 15520efb3b23SJan Kara sbi->s_resgid = gid; 15530efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15540efb3b23SJan Kara if (is_remount) { 15550efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15560efb3b23SJan Kara "Cannot specify journal on remount"); 15570efb3b23SJan Kara return -1; 15580efb3b23SJan Kara } 15590efb3b23SJan Kara *journal_devnum = arg; 1560ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1561ad4eec61SEric Sandeen char *journal_path; 1562ad4eec61SEric Sandeen struct inode *journal_inode; 1563ad4eec61SEric Sandeen struct path path; 1564ad4eec61SEric Sandeen int error; 1565ad4eec61SEric Sandeen 1566ad4eec61SEric Sandeen if (is_remount) { 1567ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1568ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1569ad4eec61SEric Sandeen return -1; 1570ad4eec61SEric Sandeen } 1571ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1572ad4eec61SEric Sandeen if (!journal_path) { 1573ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1574ad4eec61SEric Sandeen "journal device string"); 1575ad4eec61SEric Sandeen return -1; 1576ad4eec61SEric Sandeen } 1577ad4eec61SEric Sandeen 1578ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1579ad4eec61SEric Sandeen if (error) { 1580ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1581ad4eec61SEric Sandeen "journal device path: error %d", error); 1582ad4eec61SEric Sandeen kfree(journal_path); 1583ad4eec61SEric Sandeen return -1; 1584ad4eec61SEric Sandeen } 1585ad4eec61SEric Sandeen 15862b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1587ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1588ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1589ad4eec61SEric Sandeen "is not a block device", journal_path); 1590ad4eec61SEric Sandeen path_put(&path); 1591ad4eec61SEric Sandeen kfree(journal_path); 1592ad4eec61SEric Sandeen return -1; 1593ad4eec61SEric Sandeen } 1594ad4eec61SEric Sandeen 1595ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1596ad4eec61SEric Sandeen path_put(&path); 1597ad4eec61SEric Sandeen kfree(journal_path); 15980efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 15990efb3b23SJan Kara if (arg > 7) { 16005f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 16010efb3b23SJan Kara " (must be 0-7)"); 16020efb3b23SJan Kara return -1; 16030efb3b23SJan Kara } 16040efb3b23SJan Kara *journal_ioprio = 16050efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 16066ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 16076ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 16086ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 16096ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 16106ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 16116ddb2447STheodore Ts'o #else 16126ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 16136ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 16146ddb2447STheodore Ts'o #endif 161526092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 161626092bf5STheodore Ts'o if (is_remount) { 161726092bf5STheodore Ts'o if (!sbi->s_journal) 161826092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 16195f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 162026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 162126092bf5STheodore Ts'o "Cannot change data mode on remount"); 162226092bf5STheodore Ts'o return -1; 162326092bf5STheodore Ts'o } 162426092bf5STheodore Ts'o } else { 162526092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 162626092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 162726092bf5STheodore Ts'o } 162826092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 162926092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 163026092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 163126092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16325f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16335f3633e3SJan Kara "quota options when quota turned on"); 163426092bf5STheodore Ts'o return -1; 163526092bf5STheodore Ts'o } 1636262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1637262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1638262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1639262b4662SJan Kara "Cannot set journaled quota options " 1640262b4662SJan Kara "when QUOTA feature is enabled"); 1641262b4662SJan Kara return -1; 1642262b4662SJan Kara } 164326092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 164426092bf5STheodore Ts'o #endif 1645923ae0ffSRoss Zwisler #ifndef CONFIG_FS_DAX 1646923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1647923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1648923ae0ffSRoss Zwisler return -1; 1649923ae0ffSRoss Zwisler #endif 165026092bf5STheodore Ts'o } else { 165126092bf5STheodore Ts'o if (!args->from) 165226092bf5STheodore Ts'o arg = 1; 165326092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 165426092bf5STheodore Ts'o arg = !arg; 165526092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 165626092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 165726092bf5STheodore Ts'o "buggy handling of option %s", opt); 165826092bf5STheodore Ts'o WARN_ON(1); 165926092bf5STheodore Ts'o return -1; 166026092bf5STheodore Ts'o } 166126092bf5STheodore Ts'o if (arg != 0) 166226092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 166326092bf5STheodore Ts'o else 166426092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 166526092bf5STheodore Ts'o } 166626092bf5STheodore Ts'o return 1; 166726092bf5STheodore Ts'o } 166826092bf5STheodore Ts'o 1669ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1670c3191067STheodore Ts'o unsigned long *journal_devnum, 1671b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1672661aa520SEric Sandeen int is_remount) 1673ac27a0ecSDave Kleikamp { 1674617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1675ac27a0ecSDave Kleikamp char *p; 1676ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 167726092bf5STheodore Ts'o int token; 1678ac27a0ecSDave Kleikamp 1679ac27a0ecSDave Kleikamp if (!options) 1680ac27a0ecSDave Kleikamp return 1; 1681ac27a0ecSDave Kleikamp 1682ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1683ac27a0ecSDave Kleikamp if (!*p) 1684ac27a0ecSDave Kleikamp continue; 168515121c18SEric Sandeen /* 168615121c18SEric Sandeen * Initialize args struct so we know whether arg was 168715121c18SEric Sandeen * found; some options take optional arguments. 168815121c18SEric Sandeen */ 1689caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1690ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 169126092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 169226092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1693ac27a0ecSDave Kleikamp return 0; 1694ac27a0ecSDave Kleikamp } 1695ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1696262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1697262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1698262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1699262b4662SJan Kara "feature is enabled"); 1700262b4662SJan Kara return 0; 1701262b4662SJan Kara } 1702ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1703482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1704fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1705ac27a0ecSDave Kleikamp 1706482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1707fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1708ac27a0ecSDave Kleikamp 170956c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1710b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1711b31e1552SEric Sandeen "format mixing"); 1712ac27a0ecSDave Kleikamp return 0; 1713ac27a0ecSDave Kleikamp } 1714ac27a0ecSDave Kleikamp 1715ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1716b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1717b31e1552SEric Sandeen "not specified"); 1718ac27a0ecSDave Kleikamp return 0; 1719ac27a0ecSDave Kleikamp } 1720ac27a0ecSDave Kleikamp } 1721ac27a0ecSDave Kleikamp #endif 1722261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1723261cb20cSJan Kara int blocksize = 1724261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1725261cb20cSJan Kara 1726261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1727261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1728261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1729261cb20cSJan Kara return 0; 1730261cb20cSJan Kara } 1731261cb20cSJan Kara } 1732d4f76107SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 1733d4f76107SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 1734d4f76107SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " 1735d4f76107SJan Kara "in data=ordered mode"); 1736d4f76107SJan Kara return 0; 1737d4f76107SJan Kara } 1738ac27a0ecSDave Kleikamp return 1; 1739ac27a0ecSDave Kleikamp } 1740ac27a0ecSDave Kleikamp 17412adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17422adf6da8STheodore Ts'o struct super_block *sb) 17432adf6da8STheodore Ts'o { 17442adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17452adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17462adf6da8STheodore Ts'o 17472adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17482adf6da8STheodore Ts'o char *fmtname = ""; 17492adf6da8STheodore Ts'o 17502adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17512adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17522adf6da8STheodore Ts'o fmtname = "vfsold"; 17532adf6da8STheodore Ts'o break; 17542adf6da8STheodore Ts'o case QFMT_VFS_V0: 17552adf6da8STheodore Ts'o fmtname = "vfsv0"; 17562adf6da8STheodore Ts'o break; 17572adf6da8STheodore Ts'o case QFMT_VFS_V1: 17582adf6da8STheodore Ts'o fmtname = "vfsv1"; 17592adf6da8STheodore Ts'o break; 17602adf6da8STheodore Ts'o } 17612adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17622adf6da8STheodore Ts'o } 17632adf6da8STheodore Ts'o 17642adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17652adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17662adf6da8STheodore Ts'o 17672adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17682adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17692adf6da8STheodore Ts'o #endif 17702adf6da8STheodore Ts'o } 17712adf6da8STheodore Ts'o 17725a916be1STheodore Ts'o static const char *token2str(int token) 17735a916be1STheodore Ts'o { 177450df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17755a916be1STheodore Ts'o 17765a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17775a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17785a916be1STheodore Ts'o break; 17795a916be1STheodore Ts'o return t->pattern; 17805a916be1STheodore Ts'o } 17815a916be1STheodore Ts'o 17822adf6da8STheodore Ts'o /* 17832adf6da8STheodore Ts'o * Show an option if 17842adf6da8STheodore Ts'o * - it's set to a non-default value OR 17852adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17862adf6da8STheodore Ts'o */ 178766acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 178866acdcf4STheodore Ts'o int nodefs) 17892adf6da8STheodore Ts'o { 17902adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17912adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 179266acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17935a916be1STheodore Ts'o const struct mount_opts *m; 179466acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17952adf6da8STheodore Ts'o 179666acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 179766acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17982adf6da8STheodore Ts'o 17992adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 18005a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 18015a916be1STheodore Ts'o 18025a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 18035a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 18045a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 18055a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 18065a916be1STheodore Ts'o continue; 180766acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 18085a916be1STheodore Ts'o continue; /* skip if same as the default */ 18095a916be1STheodore Ts'o if ((want_set && 18105a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 18115a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 18125a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 18135a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 18145a916be1STheodore Ts'o } 18155a916be1STheodore Ts'o 181608cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 18175a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 181808cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 181908cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 182008cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 18215a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 182208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 182308cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 182466acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 18255a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18265a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18272adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18285a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18292adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18305a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 183166acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18325a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 183366acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18345a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 183566acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18365a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18372adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18385a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 183966acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18405a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 184166acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18422adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18435a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18442adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18455a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18462adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18475a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18485a916be1STheodore Ts'o } 184966acdcf4STheodore Ts'o if (nodefs || 185066acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18515a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18522adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18532adf6da8STheodore Ts'o 185466acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 185566acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18565a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1857df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1858df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18592adf6da8STheodore Ts'o 18602adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18612adf6da8STheodore Ts'o return 0; 18622adf6da8STheodore Ts'o } 18632adf6da8STheodore Ts'o 186466acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 186566acdcf4STheodore Ts'o { 186666acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 186766acdcf4STheodore Ts'o } 186866acdcf4STheodore Ts'o 186966acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 187066acdcf4STheodore Ts'o { 187166acdcf4STheodore Ts'o struct super_block *sb = seq->private; 187266acdcf4STheodore Ts'o int rc; 187366acdcf4STheodore Ts'o 187466acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 187566acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 187666acdcf4STheodore Ts'o seq_puts(seq, "\n"); 187766acdcf4STheodore Ts'o return rc; 187866acdcf4STheodore Ts'o } 187966acdcf4STheodore Ts'o 188066acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 188166acdcf4STheodore Ts'o { 1882d9dda78bSAl Viro return single_open(file, options_seq_show, PDE_DATA(inode)); 188366acdcf4STheodore Ts'o } 188466acdcf4STheodore Ts'o 188566acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 188666acdcf4STheodore Ts'o .owner = THIS_MODULE, 188766acdcf4STheodore Ts'o .open = options_open_fs, 188866acdcf4STheodore Ts'o .read = seq_read, 188966acdcf4STheodore Ts'o .llseek = seq_lseek, 189066acdcf4STheodore Ts'o .release = single_release, 189166acdcf4STheodore Ts'o }; 189266acdcf4STheodore Ts'o 1893617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1894ac27a0ecSDave Kleikamp int read_only) 1895ac27a0ecSDave Kleikamp { 1896617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1897ac27a0ecSDave Kleikamp int res = 0; 1898ac27a0ecSDave Kleikamp 1899617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1900b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1901b31e1552SEric Sandeen "forcing read-only mode"); 1902ac27a0ecSDave Kleikamp res = MS_RDONLY; 1903ac27a0ecSDave Kleikamp } 1904ac27a0ecSDave Kleikamp if (read_only) 1905281b5995STheodore Ts'o goto done; 1906617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1907b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1908b31e1552SEric Sandeen "running e2fsck is recommended"); 1909c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 1910b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1911b31e1552SEric Sandeen "warning: mounting fs with errors, " 1912b31e1552SEric Sandeen "running e2fsck is recommended"); 1913ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1914ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1915ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1916b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1917b31e1552SEric Sandeen "warning: maximal mount count reached, " 1918b31e1552SEric Sandeen "running e2fsck is recommended"); 1919ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1920ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1921ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1922b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1923b31e1552SEric Sandeen "warning: checktime reached, " 1924b31e1552SEric Sandeen "running e2fsck is recommended"); 19250390131bSFrank Mayhar if (!sbi->s_journal) 1926216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1927ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1928617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1929e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1930ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1931617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19320390131bSFrank Mayhar if (sbi->s_journal) 1933617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1934ac27a0ecSDave Kleikamp 1935e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1936281b5995STheodore Ts'o done: 1937ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1938a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1939a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1940ac27a0ecSDave Kleikamp sb->s_blocksize, 1941ac27a0ecSDave Kleikamp sbi->s_groups_count, 1942617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1943617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1944a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1945ac27a0ecSDave Kleikamp 19467abc52c2SDan Magenheimer cleancache_init_fs(sb); 1947ac27a0ecSDave Kleikamp return res; 1948ac27a0ecSDave Kleikamp } 1949ac27a0ecSDave Kleikamp 1950117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1951117fff10STheodore Ts'o { 1952117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1953117fff10STheodore Ts'o struct flex_groups *new_groups; 1954117fff10STheodore Ts'o int size; 1955117fff10STheodore Ts'o 1956117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1957117fff10STheodore Ts'o return 0; 1958117fff10STheodore Ts'o 1959117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1960117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1961117fff10STheodore Ts'o return 0; 1962117fff10STheodore Ts'o 1963117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1964117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1965117fff10STheodore Ts'o if (!new_groups) { 1966117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1967117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1968117fff10STheodore Ts'o return -ENOMEM; 1969117fff10STheodore Ts'o } 1970117fff10STheodore Ts'o 1971117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1972117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1973117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1974117fff10STheodore Ts'o sizeof(struct flex_groups))); 1975b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 1976117fff10STheodore Ts'o } 1977117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1978117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1979117fff10STheodore Ts'o return 0; 1980117fff10STheodore Ts'o } 1981117fff10STheodore Ts'o 1982772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1983772cb7c8SJose R. Santos { 1984772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1985772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1986772cb7c8SJose R. Santos ext4_group_t flex_group; 1987117fff10STheodore Ts'o int i, err; 1988772cb7c8SJose R. Santos 1989503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1990d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1991772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1992772cb7c8SJose R. Santos return 1; 1993772cb7c8SJose R. Santos } 1994772cb7c8SJose R. Santos 1995117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1996117fff10STheodore Ts'o if (err) 1997772cb7c8SJose R. Santos goto failed; 1998772cb7c8SJose R. Santos 1999772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 200088b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2001772cb7c8SJose R. Santos 2002772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 20037ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 20047ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 200590ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 200624aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 20077ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 20087ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2009772cb7c8SJose R. Santos } 2010772cb7c8SJose R. Santos 2011772cb7c8SJose R. Santos return 1; 2012772cb7c8SJose R. Santos failed: 2013772cb7c8SJose R. Santos return 0; 2014772cb7c8SJose R. Santos } 2015772cb7c8SJose R. Santos 2016feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 2017717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2018717d50e4SAndreas Dilger { 2019feb0ab32SDarrick J. Wong int offset; 2020717d50e4SAndreas Dilger __u16 crc = 0; 2021717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2022717d50e4SAndreas Dilger 20239aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2024feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2025d6a77105STheodore Ts'o __le16 save_csum; 2026feb0ab32SDarrick J. Wong __u32 csum32; 2027feb0ab32SDarrick J. Wong 2028d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 2029feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 2030feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2031feb0ab32SDarrick J. Wong sizeof(le_group)); 2032feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2033feb0ab32SDarrick J. Wong sbi->s_desc_size); 2034d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 2035feb0ab32SDarrick J. Wong 2036feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2037feb0ab32SDarrick J. Wong goto out; 2038feb0ab32SDarrick J. Wong } 2039feb0ab32SDarrick J. Wong 2040feb0ab32SDarrick J. Wong /* old crc16 code */ 2041813d32f9SDarrick J. Wong if (!(sbi->s_es->s_feature_ro_compat & 2042813d32f9SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM))) 2043813d32f9SDarrick J. Wong return 0; 2044813d32f9SDarrick J. Wong 2045feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2046feb0ab32SDarrick J. Wong 2047717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2048717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2049717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2050717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2051717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2052717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2053717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2054717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2055717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2056717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2057717d50e4SAndreas Dilger offset); 2058717d50e4SAndreas Dilger 2059feb0ab32SDarrick J. Wong out: 2060717d50e4SAndreas Dilger return cpu_to_le16(crc); 2061717d50e4SAndreas Dilger } 2062717d50e4SAndreas Dilger 2063feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2064717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2065717d50e4SAndreas Dilger { 2066feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2067feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2068feb0ab32SDarrick J. Wong block_group, gdp))) 2069717d50e4SAndreas Dilger return 0; 2070717d50e4SAndreas Dilger 2071717d50e4SAndreas Dilger return 1; 2072717d50e4SAndreas Dilger } 2073717d50e4SAndreas Dilger 2074feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2075feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2076feb0ab32SDarrick J. Wong { 2077feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2078feb0ab32SDarrick J. Wong return; 2079feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2080feb0ab32SDarrick J. Wong } 2081feb0ab32SDarrick J. Wong 2082ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2083bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2084bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2085ac27a0ecSDave Kleikamp { 2086617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2087617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2088617ba13bSMingming Cao ext4_fsblk_t last_block; 2089bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2090bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2091bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2092ce421581SJose R. Santos int flexbg_flag = 0; 2093bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2094ac27a0ecSDave Kleikamp 2095ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2096ce421581SJose R. Santos flexbg_flag = 1; 2097ce421581SJose R. Santos 2098617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2099ac27a0ecSDave Kleikamp 2100197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2101197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2102197cd65aSAkinobu Mita 2103ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2104bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2105ac27a0ecSDave Kleikamp else 2106ac27a0ecSDave Kleikamp last_block = first_block + 2107617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2108ac27a0ecSDave Kleikamp 2109bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2110bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2111bfff6873SLukas Czerner grp = i; 2112bfff6873SLukas Czerner 21138fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 21142b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2115b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2116a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2117b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2118ac27a0ecSDave Kleikamp return 0; 2119ac27a0ecSDave Kleikamp } 21208fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 21212b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2122b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2123a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2124b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2125ac27a0ecSDave Kleikamp return 0; 2126ac27a0ecSDave Kleikamp } 21278fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2128bd81d8eeSLaurent Vivier if (inode_table < first_block || 21292b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2130b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2131a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2132b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2133ac27a0ecSDave Kleikamp return 0; 2134ac27a0ecSDave Kleikamp } 2135955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2136feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2137b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2138b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2139fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2140fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21417ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2142955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2143717d50e4SAndreas Dilger return 0; 2144717d50e4SAndreas Dilger } 21457ee1ec4cSLi Zefan } 2146955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2147ce421581SJose R. Santos if (!flexbg_flag) 2148617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2149ac27a0ecSDave Kleikamp } 2150bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2151bfff6873SLukas Czerner *first_not_zeroed = grp; 2152ac27a0ecSDave Kleikamp return 1; 2153ac27a0ecSDave Kleikamp } 2154ac27a0ecSDave Kleikamp 2155617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2156ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2157ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2158ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2159ac27a0ecSDave Kleikamp * 2160ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2161ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2162ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2163ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2164ac27a0ecSDave Kleikamp * 2165ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2166ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2167ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2168617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2169ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2170ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2171ac27a0ecSDave Kleikamp */ 2172617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2173617ba13bSMingming Cao struct ext4_super_block *es) 2174ac27a0ecSDave Kleikamp { 2175ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2176ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2177ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2178ac27a0ecSDave Kleikamp int i; 2179ac27a0ecSDave Kleikamp #endif 2180ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2181ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2182ac27a0ecSDave Kleikamp return; 2183ac27a0ecSDave Kleikamp } 2184ac27a0ecSDave Kleikamp 2185a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2186b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2187b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2188a8f48a95SEric Sandeen return; 2189a8f48a95SEric Sandeen } 2190a8f48a95SEric Sandeen 2191d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2192d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2193d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2194d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2195d39195c3SAmir Goldstein return; 2196d39195c3SAmir Goldstein } 2197d39195c3SAmir Goldstein 2198617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2199c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2200c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 220184474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2202ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2203ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2204c25f9bc6SEric Sandeen } 2205ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2206ac27a0ecSDave Kleikamp return; 2207ac27a0ecSDave Kleikamp } 2208ac27a0ecSDave Kleikamp 2209ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2210b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2211ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2212ac27a0ecSDave Kleikamp } 2213ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2214ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2215ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2216ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2217a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2218617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2219617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2220ac27a0ecSDave Kleikamp if (ret < 0) 2221b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2222b31e1552SEric Sandeen "Cannot turn on journaled " 2223b31e1552SEric Sandeen "quota: error %d", ret); 2224ac27a0ecSDave Kleikamp } 2225ac27a0ecSDave Kleikamp } 2226ac27a0ecSDave Kleikamp #endif 2227ac27a0ecSDave Kleikamp 2228ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2229ac27a0ecSDave Kleikamp struct inode *inode; 2230ac27a0ecSDave Kleikamp 223197bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 223297bd42b9SJosef Bacik if (IS_ERR(inode)) { 2233ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2234ac27a0ecSDave Kleikamp break; 2235ac27a0ecSDave Kleikamp } 2236ac27a0ecSDave Kleikamp 2237617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2238871a2931SChristoph Hellwig dquot_initialize(inode); 2239ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2240566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2241b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2242b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 224346e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2244e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2245ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2246721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 224755f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2248617ba13bSMingming Cao ext4_truncate(inode); 2249721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2250ac27a0ecSDave Kleikamp nr_truncates++; 2251ac27a0ecSDave Kleikamp } else { 2252566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2253b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2254b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 225546e665e9SHarvey Harrison __func__, inode->i_ino); 2256ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2257ac27a0ecSDave Kleikamp inode->i_ino); 2258ac27a0ecSDave Kleikamp nr_orphans++; 2259ac27a0ecSDave Kleikamp } 2260ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2261ac27a0ecSDave Kleikamp } 2262ac27a0ecSDave Kleikamp 2263ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2264ac27a0ecSDave Kleikamp 2265ac27a0ecSDave Kleikamp if (nr_orphans) 2266b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2267b31e1552SEric Sandeen PLURAL(nr_orphans)); 2268ac27a0ecSDave Kleikamp if (nr_truncates) 2269b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2270b31e1552SEric Sandeen PLURAL(nr_truncates)); 2271ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2272ac27a0ecSDave Kleikamp /* Turn quotas off */ 2273a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2274ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2275287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2276ac27a0ecSDave Kleikamp } 2277ac27a0ecSDave Kleikamp #endif 2278ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2279ac27a0ecSDave Kleikamp } 22800b8e58a1SAndreas Dilger 2281cd2291a4SEric Sandeen /* 2282cd2291a4SEric Sandeen * Maximal extent format file size. 2283cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2284cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2285cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2286cd2291a4SEric Sandeen * so that won't be a limiting factor. 2287cd2291a4SEric Sandeen * 2288f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2289f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2290f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2291f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2292f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2293f17722f9SLukas Czerner * 2294cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2295cd2291a4SEric Sandeen */ 2296f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2297cd2291a4SEric Sandeen { 2298cd2291a4SEric Sandeen loff_t res; 2299cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2300cd2291a4SEric Sandeen 2301cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2302f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2303cd2291a4SEric Sandeen /* 230490c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2305cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2306cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2307cd2291a4SEric Sandeen */ 2308cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2309cd2291a4SEric Sandeen 2310cd2291a4SEric Sandeen /* total blocks in file system block size */ 2311cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2312cd2291a4SEric Sandeen upper_limit <<= blkbits; 2313cd2291a4SEric Sandeen } 2314cd2291a4SEric Sandeen 2315f17722f9SLukas Czerner /* 2316f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2317f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2318f17722f9SLukas Czerner * size 2319f17722f9SLukas Czerner */ 2320f17722f9SLukas Czerner res = (1LL << 32) - 1; 2321cd2291a4SEric Sandeen res <<= blkbits; 2322cd2291a4SEric Sandeen 2323cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2324cd2291a4SEric Sandeen if (res > upper_limit) 2325cd2291a4SEric Sandeen res = upper_limit; 2326cd2291a4SEric Sandeen 2327cd2291a4SEric Sandeen return res; 2328cd2291a4SEric Sandeen } 2329ac27a0ecSDave Kleikamp 2330ac27a0ecSDave Kleikamp /* 2331cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23320fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23330fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2334ac27a0ecSDave Kleikamp */ 2335f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2336ac27a0ecSDave Kleikamp { 2337617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23380fc1b451SAneesh Kumar K.V int meta_blocks; 23390fc1b451SAneesh Kumar K.V loff_t upper_limit; 23400b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23410b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23420b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23430b8e58a1SAndreas Dilger * 23440b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23450b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23460fc1b451SAneesh Kumar K.V */ 23470fc1b451SAneesh Kumar K.V 2348f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23490fc1b451SAneesh Kumar K.V /* 235090c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23510b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23520b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23530fc1b451SAneesh Kumar K.V */ 23540fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23550fc1b451SAneesh Kumar K.V 23560fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23570fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23580fc1b451SAneesh Kumar K.V 23590fc1b451SAneesh Kumar K.V } else { 23608180a562SAneesh Kumar K.V /* 23618180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23628180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23638180a562SAneesh Kumar K.V * represent total number of blocks in 23648180a562SAneesh Kumar K.V * file system block size 23658180a562SAneesh Kumar K.V */ 23660fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23670fc1b451SAneesh Kumar K.V 23680fc1b451SAneesh Kumar K.V } 23690fc1b451SAneesh Kumar K.V 23700fc1b451SAneesh Kumar K.V /* indirect blocks */ 23710fc1b451SAneesh Kumar K.V meta_blocks = 1; 23720fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23730fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23740fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23750fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23760fc1b451SAneesh Kumar K.V 23770fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23780fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2379ac27a0ecSDave Kleikamp 2380ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2381ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2382ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2383ac27a0ecSDave Kleikamp res <<= bits; 2384ac27a0ecSDave Kleikamp if (res > upper_limit) 2385ac27a0ecSDave Kleikamp res = upper_limit; 23860fc1b451SAneesh Kumar K.V 23870fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23880fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23890fc1b451SAneesh Kumar K.V 2390ac27a0ecSDave Kleikamp return res; 2391ac27a0ecSDave Kleikamp } 2392ac27a0ecSDave Kleikamp 2393617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 239470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2395ac27a0ecSDave Kleikamp { 2396617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2397fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2398ac27a0ecSDave Kleikamp int has_super = 0; 2399ac27a0ecSDave Kleikamp 2400ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2401ac27a0ecSDave Kleikamp 2402617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2403ac27a0ecSDave Kleikamp nr < first_meta_bg) 240470bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2405ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2406617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2407ac27a0ecSDave Kleikamp has_super = 1; 24080b8e58a1SAndreas Dilger 2409bd63f6b0SDarrick J. Wong /* 2410bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2411bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2412bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2413bd63f6b0SDarrick J. Wong * compensate. 2414bd63f6b0SDarrick J. Wong */ 2415bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2416bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2417bd63f6b0SDarrick J. Wong has_super++; 2418bd63f6b0SDarrick J. Wong 2419617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2420ac27a0ecSDave Kleikamp } 2421ac27a0ecSDave Kleikamp 2422c9de560dSAlex Tomas /** 2423c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2424c9de560dSAlex Tomas * @sbi: In memory super block info 2425c9de560dSAlex Tomas * 2426c9de560dSAlex Tomas * If we have specified it via mount option, then 2427c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2428c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2429c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2430c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2431c9de560dSAlex Tomas * 2432c9de560dSAlex Tomas */ 2433c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2434c9de560dSAlex Tomas { 2435c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2436c9de560dSAlex Tomas unsigned long stripe_width = 2437c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24383eb08658SDan Ehrenberg int ret; 2439c9de560dSAlex Tomas 2440c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24413eb08658SDan Ehrenberg ret = sbi->s_stripe; 24423eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24433eb08658SDan Ehrenberg ret = stripe_width; 24443eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24453eb08658SDan Ehrenberg ret = stride; 24463eb08658SDan Ehrenberg else 24473eb08658SDan Ehrenberg ret = 0; 2448c9de560dSAlex Tomas 24493eb08658SDan Ehrenberg /* 24503eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24513eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24523eb08658SDan Ehrenberg */ 24533eb08658SDan Ehrenberg if (ret <= 1) 24543eb08658SDan Ehrenberg ret = 0; 2455c9de560dSAlex Tomas 24563eb08658SDan Ehrenberg return ret; 2457c9de560dSAlex Tomas } 2458ac27a0ecSDave Kleikamp 24593197ebdbSTheodore Ts'o /* sysfs supprt */ 24603197ebdbSTheodore Ts'o 24613197ebdbSTheodore Ts'o struct ext4_attr { 24623197ebdbSTheodore Ts'o struct attribute attr; 24633197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24643197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24653197ebdbSTheodore Ts'o const char *, size_t); 2466f2d50a65SJan Kara union { 24673197ebdbSTheodore Ts'o int offset; 2468f2d50a65SJan Kara int deprecated_val; 2469f2d50a65SJan Kara } u; 24703197ebdbSTheodore Ts'o }; 24713197ebdbSTheodore Ts'o 247227dd4385SLukas Czerner static int parse_strtoull(const char *buf, 247327dd4385SLukas Czerner unsigned long long max, unsigned long long *value) 247427dd4385SLukas Czerner { 247527dd4385SLukas Czerner int ret; 247627dd4385SLukas Czerner 247727dd4385SLukas Czerner ret = kstrtoull(skip_spaces(buf), 0, value); 247827dd4385SLukas Czerner if (!ret && *value > max) 247927dd4385SLukas Czerner ret = -EINVAL; 248027dd4385SLukas Czerner return ret; 248127dd4385SLukas Czerner } 248227dd4385SLukas Czerner 24833197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24843197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24853197ebdbSTheodore Ts'o char *buf) 24863197ebdbSTheodore Ts'o { 24873197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24887b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24897b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24903197ebdbSTheodore Ts'o } 24913197ebdbSTheodore Ts'o 24923197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24933197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24943197ebdbSTheodore Ts'o { 24953197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24963197ebdbSTheodore Ts'o 2497f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2498f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24993197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 25003197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 25013197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 25023197ebdbSTheodore Ts'o } 25033197ebdbSTheodore Ts'o 25043197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 25053197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25063197ebdbSTheodore Ts'o { 25073197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 25083197ebdbSTheodore Ts'o 2509f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2510f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 25113197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2512a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 25133197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2514a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 25153197ebdbSTheodore Ts'o } 25163197ebdbSTheodore Ts'o 25173197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 25183197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25193197ebdbSTheodore Ts'o const char *buf, size_t count) 25203197ebdbSTheodore Ts'o { 25213197ebdbSTheodore Ts'o unsigned long t; 2522e1091b15SLukas Czerner int ret; 25233197ebdbSTheodore Ts'o 2524e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2525e1091b15SLukas Czerner if (ret) 2526e1091b15SLukas Czerner return ret; 25273197ebdbSTheodore Ts'o 2528e1091b15SLukas Czerner if (t && (!is_power_of_2(t) || t > 0x40000000)) 25293197ebdbSTheodore Ts'o return -EINVAL; 25303197ebdbSTheodore Ts'o 25313197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 25323197ebdbSTheodore Ts'o return count; 25333197ebdbSTheodore Ts'o } 25343197ebdbSTheodore Ts'o 25353197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25363197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25373197ebdbSTheodore Ts'o { 2538f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25393197ebdbSTheodore Ts'o 25403197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25413197ebdbSTheodore Ts'o } 25423197ebdbSTheodore Ts'o 25433197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25443197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25453197ebdbSTheodore Ts'o const char *buf, size_t count) 25463197ebdbSTheodore Ts'o { 2547f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25483197ebdbSTheodore Ts'o unsigned long t; 2549e1091b15SLukas Czerner int ret; 25503197ebdbSTheodore Ts'o 2551e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2552e1091b15SLukas Czerner if (ret) 2553e1091b15SLukas Czerner return ret; 25543197ebdbSTheodore Ts'o *ui = t; 25553197ebdbSTheodore Ts'o return count; 25563197ebdbSTheodore Ts'o } 25573197ebdbSTheodore Ts'o 255852c198c6SLukas Czerner static ssize_t es_ui_show(struct ext4_attr *a, 255952c198c6SLukas Czerner struct ext4_sb_info *sbi, char *buf) 256052c198c6SLukas Czerner { 256152c198c6SLukas Czerner 256252c198c6SLukas Czerner unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) + 256352c198c6SLukas Czerner a->u.offset); 256452c198c6SLukas Czerner 256552c198c6SLukas Czerner return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 256652c198c6SLukas Czerner } 256752c198c6SLukas Czerner 256827dd4385SLukas Czerner static ssize_t reserved_clusters_show(struct ext4_attr *a, 256927dd4385SLukas Czerner struct ext4_sb_info *sbi, char *buf) 257027dd4385SLukas Czerner { 257127dd4385SLukas Czerner return snprintf(buf, PAGE_SIZE, "%llu\n", 257227dd4385SLukas Czerner (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); 257327dd4385SLukas Czerner } 257427dd4385SLukas Czerner 257527dd4385SLukas Czerner static ssize_t reserved_clusters_store(struct ext4_attr *a, 257627dd4385SLukas Czerner struct ext4_sb_info *sbi, 257727dd4385SLukas Czerner const char *buf, size_t count) 257827dd4385SLukas Czerner { 257927dd4385SLukas Czerner unsigned long long val; 258027dd4385SLukas Czerner int ret; 258127dd4385SLukas Czerner 258227dd4385SLukas Czerner if (parse_strtoull(buf, -1ULL, &val)) 258327dd4385SLukas Czerner return -EINVAL; 258427dd4385SLukas Czerner ret = ext4_reserve_clusters(sbi, val); 258527dd4385SLukas Czerner 258627dd4385SLukas Czerner return ret ? ret : count; 258727dd4385SLukas Czerner } 258827dd4385SLukas Czerner 25892c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25902c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25912c0544b2STheodore Ts'o const char *buf, size_t count) 25922c0544b2STheodore Ts'o { 25932c0544b2STheodore Ts'o int len = count; 25942c0544b2STheodore Ts'o 25952c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25962c0544b2STheodore Ts'o return -EPERM; 25972c0544b2STheodore Ts'o 25982c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25992c0544b2STheodore Ts'o len--; 26002c0544b2STheodore Ts'o 26012c0544b2STheodore Ts'o if (len) 26022c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 26032c0544b2STheodore Ts'o return count; 26042c0544b2STheodore Ts'o } 26052c0544b2STheodore Ts'o 2606f2d50a65SJan Kara static ssize_t sbi_deprecated_show(struct ext4_attr *a, 2607f2d50a65SJan Kara struct ext4_sb_info *sbi, char *buf) 2608f2d50a65SJan Kara { 2609f2d50a65SJan Kara return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); 2610f2d50a65SJan Kara } 2611f2d50a65SJan Kara 26123197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 26133197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 26143197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 26153197ebdbSTheodore Ts'o .show = _show, \ 26163197ebdbSTheodore Ts'o .store = _store, \ 2617f2d50a65SJan Kara .u = { \ 26183197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname),\ 2619f2d50a65SJan Kara }, \ 26203197ebdbSTheodore Ts'o } 262152c198c6SLukas Czerner 262252c198c6SLukas Czerner #define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \ 262352c198c6SLukas Czerner static struct ext4_attr ext4_attr_##_name = { \ 262452c198c6SLukas Czerner .attr = {.name = __stringify(_name), .mode = _mode }, \ 262552c198c6SLukas Czerner .show = _show, \ 262652c198c6SLukas Czerner .store = _store, \ 262752c198c6SLukas Czerner .u = { \ 262852c198c6SLukas Czerner .offset = offsetof(struct ext4_super_block, _elname), \ 262952c198c6SLukas Czerner }, \ 263052c198c6SLukas Czerner } 263152c198c6SLukas Czerner 26323197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 26333197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 26343197ebdbSTheodore Ts'o 2635857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 26363197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 26373197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 263852c198c6SLukas Czerner 263952c198c6SLukas Czerner #define EXT4_RO_ATTR_ES_UI(name, elname) \ 264052c198c6SLukas Czerner EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname) 26413197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 26423197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 264352c198c6SLukas Czerner 26443197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 2645f2d50a65SJan Kara #define EXT4_DEPRECATED_ATTR(_name, _val) \ 2646f2d50a65SJan Kara static struct ext4_attr ext4_attr_##_name = { \ 2647f2d50a65SJan Kara .attr = {.name = __stringify(_name), .mode = 0444 }, \ 2648f2d50a65SJan Kara .show = sbi_deprecated_show, \ 2649f2d50a65SJan Kara .u = { \ 2650f2d50a65SJan Kara .deprecated_val = _val, \ 2651f2d50a65SJan Kara }, \ 2652f2d50a65SJan Kara } 26533197ebdbSTheodore Ts'o 26543197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 26553197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 26563197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 265727dd4385SLukas Czerner EXT4_RW_ATTR(reserved_clusters); 26583197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 26593197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 266011013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 26613197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 26623197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 26633197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 26643197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26653197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26663197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 2667f2d50a65SJan Kara EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); 266867a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 26692c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 2670efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 2671efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 2672efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 2673efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 2674efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 2675efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 267652c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 267752c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); 267852c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); 26793197ebdbSTheodore Ts'o 26803197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26813197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26823197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26833197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 268427dd4385SLukas Czerner ATTR_LIST(reserved_clusters), 26853197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 268611013911SAndreas Dilger ATTR_LIST(inode_goal), 26873197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26883197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26893197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26903197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26913197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26923197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 269355138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 269467a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 26952c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 2696efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 2697efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_burst), 2698efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 2699efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 2700efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 2701efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 270252c198c6SLukas Czerner ATTR_LIST(errors_count), 270352c198c6SLukas Czerner ATTR_LIST(first_error_time), 270452c198c6SLukas Czerner ATTR_LIST(last_error_time), 27053197ebdbSTheodore Ts'o NULL, 27063197ebdbSTheodore Ts'o }; 27073197ebdbSTheodore Ts'o 2708857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2709857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 271027ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 27115e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 27126ddb2447STheodore Ts'o EXT4_INFO_ATTR(encryption); 2713857ac889SLukas Czerner 2714857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2715857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 271627ee40dfSLukas Czerner ATTR_LIST(batched_discard), 27175e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 27186ddb2447STheodore Ts'o ATTR_LIST(encryption), 2719857ac889SLukas Czerner NULL, 2720857ac889SLukas Czerner }; 2721857ac889SLukas Czerner 27223197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 27233197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 27243197ebdbSTheodore Ts'o { 27253197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27263197ebdbSTheodore Ts'o s_kobj); 27273197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27283197ebdbSTheodore Ts'o 27293197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 27303197ebdbSTheodore Ts'o } 27313197ebdbSTheodore Ts'o 27323197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 27333197ebdbSTheodore Ts'o struct attribute *attr, 27343197ebdbSTheodore Ts'o const char *buf, size_t len) 27353197ebdbSTheodore Ts'o { 27363197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27373197ebdbSTheodore Ts'o s_kobj); 27383197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27393197ebdbSTheodore Ts'o 27403197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 27413197ebdbSTheodore Ts'o } 27423197ebdbSTheodore Ts'o 27433197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 27443197ebdbSTheodore Ts'o { 27453197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27463197ebdbSTheodore Ts'o s_kobj); 27473197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 27483197ebdbSTheodore Ts'o } 27493197ebdbSTheodore Ts'o 275052cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 27513197ebdbSTheodore Ts'o .show = ext4_attr_show, 27523197ebdbSTheodore Ts'o .store = ext4_attr_store, 27533197ebdbSTheodore Ts'o }; 27543197ebdbSTheodore Ts'o 27553197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 27563197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 27573197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 27583197ebdbSTheodore Ts'o .release = ext4_sb_release, 27593197ebdbSTheodore Ts'o }; 27603197ebdbSTheodore Ts'o 2761857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2762857ac889SLukas Czerner { 2763857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2764857ac889SLukas Czerner } 2765857ac889SLukas Czerner 2766c7f72543SLukas Czerner static ssize_t ext4_feat_show(struct kobject *kobj, 2767c7f72543SLukas Czerner struct attribute *attr, char *buf) 2768c7f72543SLukas Czerner { 2769c7f72543SLukas Czerner return snprintf(buf, PAGE_SIZE, "supported\n"); 2770c7f72543SLukas Czerner } 2771c7f72543SLukas Czerner 2772c7f72543SLukas Czerner /* 2773c7f72543SLukas Czerner * We can not use ext4_attr_show/store because it relies on the kobject 2774c7f72543SLukas Czerner * being embedded in the ext4_sb_info structure which is definitely not 2775c7f72543SLukas Czerner * true in this case. 2776c7f72543SLukas Czerner */ 2777c7f72543SLukas Czerner static const struct sysfs_ops ext4_feat_ops = { 2778c7f72543SLukas Czerner .show = ext4_feat_show, 2779c7f72543SLukas Czerner .store = NULL, 2780c7f72543SLukas Czerner }; 2781c7f72543SLukas Czerner 2782857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2783857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2784c7f72543SLukas Czerner .sysfs_ops = &ext4_feat_ops, 2785857ac889SLukas Czerner .release = ext4_feat_release, 2786857ac889SLukas Czerner }; 2787857ac889SLukas Czerner 2788a13fb1a4SEric Sandeen /* 2789a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2790a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2791a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2792a13fb1a4SEric Sandeen * 0 if it cannot be. 2793a13fb1a4SEric Sandeen */ 2794a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2795a13fb1a4SEric Sandeen { 2796a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2797a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2798a13fb1a4SEric Sandeen "Couldn't mount because of " 2799a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2800a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2801a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2802a13fb1a4SEric Sandeen return 0; 2803a13fb1a4SEric Sandeen } 2804a13fb1a4SEric Sandeen 2805a13fb1a4SEric Sandeen if (readonly) 2806a13fb1a4SEric Sandeen return 1; 2807a13fb1a4SEric Sandeen 28082cb5cc8bSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_READONLY)) { 28092cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 28102cb5cc8bSDarrick J. Wong sb->s_flags |= MS_RDONLY; 28112cb5cc8bSDarrick J. Wong return 1; 28122cb5cc8bSDarrick J. Wong } 28132cb5cc8bSDarrick J. Wong 2814a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2815a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2816a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2817a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2818a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2819a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2820a13fb1a4SEric Sandeen return 0; 2821a13fb1a4SEric Sandeen } 2822a13fb1a4SEric Sandeen /* 2823a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2824a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2825a13fb1a4SEric Sandeen */ 2826a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2827a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2828a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2829a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2830a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2831a13fb1a4SEric Sandeen return 0; 2832a13fb1a4SEric Sandeen } 2833a13fb1a4SEric Sandeen } 2834bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2835bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2836bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2837bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2838bab08ab9STheodore Ts'o "extents feature\n"); 2839bab08ab9STheodore Ts'o return 0; 2840bab08ab9STheodore Ts'o } 28417c319d32SAditya Kali 28427c319d32SAditya Kali #ifndef CONFIG_QUOTA 28437c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 28447c319d32SAditya Kali !readonly) { 28457c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28467c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28477c319d32SAditya Kali "without CONFIG_QUOTA"); 28487c319d32SAditya Kali return 0; 28497c319d32SAditya Kali } 28507c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2851a13fb1a4SEric Sandeen return 1; 2852a13fb1a4SEric Sandeen } 2853a13fb1a4SEric Sandeen 285466e61a9eSTheodore Ts'o /* 285566e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 285666e61a9eSTheodore Ts'o * on the file system 285766e61a9eSTheodore Ts'o */ 285866e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 285966e61a9eSTheodore Ts'o { 286066e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 286166e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 286266e61a9eSTheodore Ts'o struct ext4_super_block *es; 286366e61a9eSTheodore Ts'o 286466e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 286566e61a9eSTheodore Ts'o es = sbi->s_es; 286666e61a9eSTheodore Ts'o 286766e61a9eSTheodore Ts'o if (es->s_error_count) 2868ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2869ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 287066e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 287166e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2872ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 287366e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 287466e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 287566e61a9eSTheodore Ts'o es->s_first_error_func, 287666e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 287766e61a9eSTheodore Ts'o if (es->s_first_error_ino) 287866e61a9eSTheodore Ts'o printk(": inode %u", 287966e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 288066e61a9eSTheodore Ts'o if (es->s_first_error_block) 288166e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 288266e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 288366e61a9eSTheodore Ts'o printk("\n"); 288466e61a9eSTheodore Ts'o } 288566e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2886ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 288766e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 288866e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 288966e61a9eSTheodore Ts'o es->s_last_error_func, 289066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 289166e61a9eSTheodore Ts'o if (es->s_last_error_ino) 289266e61a9eSTheodore Ts'o printk(": inode %u", 289366e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 289466e61a9eSTheodore Ts'o if (es->s_last_error_block) 289566e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 289666e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 289766e61a9eSTheodore Ts'o printk("\n"); 289866e61a9eSTheodore Ts'o } 289966e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 290066e61a9eSTheodore Ts'o } 290166e61a9eSTheodore Ts'o 2902bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2903bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2904bfff6873SLukas Czerner { 2905bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2906bfff6873SLukas Czerner ext4_group_t group, ngroups; 2907bfff6873SLukas Czerner struct super_block *sb; 2908bfff6873SLukas Czerner unsigned long timeout = 0; 2909bfff6873SLukas Czerner int ret = 0; 2910bfff6873SLukas Czerner 2911bfff6873SLukas Czerner sb = elr->lr_super; 2912bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2913bfff6873SLukas Czerner 29148e8ad8a5SJan Kara sb_start_write(sb); 2915bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2916bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2917bfff6873SLukas Czerner if (!gdp) { 2918bfff6873SLukas Czerner ret = 1; 2919bfff6873SLukas Czerner break; 2920bfff6873SLukas Czerner } 2921bfff6873SLukas Czerner 2922bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2923bfff6873SLukas Czerner break; 2924bfff6873SLukas Czerner } 2925bfff6873SLukas Czerner 29267f511862STheodore Ts'o if (group >= ngroups) 2927bfff6873SLukas Czerner ret = 1; 2928bfff6873SLukas Czerner 2929bfff6873SLukas Czerner if (!ret) { 2930bfff6873SLukas Czerner timeout = jiffies; 2931bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2932bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2933bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 293451ce6511SLukas Czerner timeout = (jiffies - timeout) * 293551ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2936bfff6873SLukas Czerner elr->lr_timeout = timeout; 2937bfff6873SLukas Czerner } 2938bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2939bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2940bfff6873SLukas Czerner } 29418e8ad8a5SJan Kara sb_end_write(sb); 2942bfff6873SLukas Czerner 2943bfff6873SLukas Czerner return ret; 2944bfff6873SLukas Czerner } 2945bfff6873SLukas Czerner 2946bfff6873SLukas Czerner /* 2947bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29484ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2949bfff6873SLukas Czerner */ 2950bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2951bfff6873SLukas Czerner { 2952bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2953bfff6873SLukas Czerner 2954bfff6873SLukas Czerner if (!elr) 2955bfff6873SLukas Czerner return; 2956bfff6873SLukas Czerner 2957bfff6873SLukas Czerner sbi = elr->lr_sbi; 2958bfff6873SLukas Czerner 2959bfff6873SLukas Czerner list_del(&elr->lr_request); 2960bfff6873SLukas Czerner sbi->s_li_request = NULL; 2961bfff6873SLukas Czerner kfree(elr); 2962bfff6873SLukas Czerner } 2963bfff6873SLukas Czerner 2964bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2965bfff6873SLukas Czerner { 29661bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29671bb933fbSLukas Czerner if (!ext4_li_info) { 29681bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2969bfff6873SLukas Czerner return; 29701bb933fbSLukas Czerner } 2971bfff6873SLukas Czerner 2972bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29731bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2974bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29751bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2976bfff6873SLukas Czerner } 2977bfff6873SLukas Czerner 29788f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29798f1f7453SEric Sandeen 2980bfff6873SLukas Czerner /* 2981bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2982bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2983bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2984bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2985bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2986bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2987bfff6873SLukas Czerner * next waking time and put itself into sleep. 2988bfff6873SLukas Czerner */ 2989bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2990bfff6873SLukas Czerner { 2991bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2992bfff6873SLukas Czerner struct list_head *pos, *n; 2993bfff6873SLukas Czerner struct ext4_li_request *elr; 29944ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2995bfff6873SLukas Czerner 2996bfff6873SLukas Czerner BUG_ON(NULL == eli); 2997bfff6873SLukas Czerner 2998bfff6873SLukas Czerner cont_thread: 2999bfff6873SLukas Czerner while (true) { 3000bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3001bfff6873SLukas Czerner 3002bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3003bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3004bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3005bfff6873SLukas Czerner goto exit_thread; 3006bfff6873SLukas Czerner } 3007bfff6873SLukas Czerner 3008bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3009bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3010bfff6873SLukas Czerner lr_request); 3011bfff6873SLukas Czerner 3012b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 3013b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 3014b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3015bfff6873SLukas Czerner ext4_remove_li_request(elr); 3016bfff6873SLukas Czerner continue; 3017bfff6873SLukas Czerner } 3018b2c78cd0STheodore Ts'o } 3019bfff6873SLukas Czerner 3020bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3021bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3022bfff6873SLukas Czerner } 3023bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3024bfff6873SLukas Czerner 3025a0acae0eSTejun Heo try_to_freeze(); 3026bfff6873SLukas Czerner 30274ed5c033SLukas Czerner cur = jiffies; 30284ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3029f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3030bfff6873SLukas Czerner cond_resched(); 3031bfff6873SLukas Czerner continue; 3032bfff6873SLukas Czerner } 3033bfff6873SLukas Czerner 30344ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 30354ed5c033SLukas Czerner 30368f1f7453SEric Sandeen if (kthread_should_stop()) { 30378f1f7453SEric Sandeen ext4_clear_request_list(); 30388f1f7453SEric Sandeen goto exit_thread; 30398f1f7453SEric Sandeen } 3040bfff6873SLukas Czerner } 3041bfff6873SLukas Czerner 3042bfff6873SLukas Czerner exit_thread: 3043bfff6873SLukas Czerner /* 3044bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3045bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3046bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3047bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3048bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3049bfff6873SLukas Czerner * new one. 3050bfff6873SLukas Czerner */ 3051bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3052bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3053bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3054bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3055bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3056bfff6873SLukas Czerner goto cont_thread; 3057bfff6873SLukas Czerner } 3058bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3059bfff6873SLukas Czerner kfree(ext4_li_info); 3060bfff6873SLukas Czerner ext4_li_info = NULL; 3061bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3062bfff6873SLukas Czerner 3063bfff6873SLukas Czerner return 0; 3064bfff6873SLukas Czerner } 3065bfff6873SLukas Czerner 3066bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3067bfff6873SLukas Czerner { 3068bfff6873SLukas Czerner struct list_head *pos, *n; 3069bfff6873SLukas Czerner struct ext4_li_request *elr; 3070bfff6873SLukas Czerner 3071bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3072bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3073bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3074bfff6873SLukas Czerner lr_request); 3075bfff6873SLukas Czerner ext4_remove_li_request(elr); 3076bfff6873SLukas Czerner } 3077bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3078bfff6873SLukas Czerner } 3079bfff6873SLukas Czerner 3080bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3081bfff6873SLukas Czerner { 30828f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30838f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30848f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30858f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3086bfff6873SLukas Czerner ext4_clear_request_list(); 3087bfff6873SLukas Czerner kfree(ext4_li_info); 3088bfff6873SLukas Czerner ext4_li_info = NULL; 308992b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3090bfff6873SLukas Czerner "initialization thread\n", 3091bfff6873SLukas Czerner err); 3092bfff6873SLukas Czerner return err; 3093bfff6873SLukas Czerner } 3094bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3095bfff6873SLukas Czerner return 0; 3096bfff6873SLukas Czerner } 3097bfff6873SLukas Czerner 3098bfff6873SLukas Czerner /* 3099bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3100bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3101bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3102bfff6873SLukas Czerner * groups and return total number of groups. 3103bfff6873SLukas Czerner */ 3104bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3105bfff6873SLukas Czerner { 3106bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3107bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3108bfff6873SLukas Czerner 3109bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3110bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3111bfff6873SLukas Czerner if (!gdp) 3112bfff6873SLukas Czerner continue; 3113bfff6873SLukas Czerner 3114bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3115bfff6873SLukas Czerner break; 3116bfff6873SLukas Czerner } 3117bfff6873SLukas Czerner 3118bfff6873SLukas Czerner return group; 3119bfff6873SLukas Czerner } 3120bfff6873SLukas Czerner 3121bfff6873SLukas Czerner static int ext4_li_info_new(void) 3122bfff6873SLukas Czerner { 3123bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3124bfff6873SLukas Czerner 3125bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3126bfff6873SLukas Czerner if (!eli) 3127bfff6873SLukas Czerner return -ENOMEM; 3128bfff6873SLukas Czerner 3129bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3130bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3131bfff6873SLukas Czerner 3132bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3133bfff6873SLukas Czerner 3134bfff6873SLukas Czerner ext4_li_info = eli; 3135bfff6873SLukas Czerner 3136bfff6873SLukas Czerner return 0; 3137bfff6873SLukas Czerner } 3138bfff6873SLukas Czerner 3139bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3140bfff6873SLukas Czerner ext4_group_t start) 3141bfff6873SLukas Czerner { 3142bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3143bfff6873SLukas Czerner struct ext4_li_request *elr; 3144bfff6873SLukas Czerner 3145bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3146bfff6873SLukas Czerner if (!elr) 3147bfff6873SLukas Czerner return NULL; 3148bfff6873SLukas Czerner 3149bfff6873SLukas Czerner elr->lr_super = sb; 3150bfff6873SLukas Czerner elr->lr_sbi = sbi; 3151bfff6873SLukas Czerner elr->lr_next_group = start; 3152bfff6873SLukas Czerner 3153bfff6873SLukas Czerner /* 3154bfff6873SLukas Czerner * Randomize first schedule time of the request to 3155bfff6873SLukas Czerner * spread the inode table initialization requests 3156bfff6873SLukas Czerner * better. 3157bfff6873SLukas Czerner */ 3158dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3159dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3160bfff6873SLukas Czerner return elr; 3161bfff6873SLukas Czerner } 3162bfff6873SLukas Czerner 31637f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3164bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3165bfff6873SLukas Czerner { 3166bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31677f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3168bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 31696c5a6cb9SAndrew Morton int ret = 0; 3170bfff6873SLukas Czerner 31717f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 317251ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 317351ce6511SLukas Czerner /* 317451ce6511SLukas Czerner * Reset timeout so it can be computed again, because 317551ce6511SLukas Czerner * s_li_wait_mult might have changed. 317651ce6511SLukas Czerner */ 317751ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31787f511862STheodore Ts'o goto out; 317951ce6511SLukas Czerner } 3180bfff6873SLukas Czerner 3181bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3182bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 318355ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31847f511862STheodore Ts'o goto out; 3185bfff6873SLukas Czerner 3186bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31877f511862STheodore Ts'o if (!elr) { 31887f511862STheodore Ts'o ret = -ENOMEM; 31897f511862STheodore Ts'o goto out; 31907f511862STheodore Ts'o } 3191bfff6873SLukas Czerner 3192bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3193bfff6873SLukas Czerner ret = ext4_li_info_new(); 3194bfff6873SLukas Czerner if (ret) 3195bfff6873SLukas Czerner goto out; 3196bfff6873SLukas Czerner } 3197bfff6873SLukas Czerner 3198bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3199bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3200bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3201bfff6873SLukas Czerner 3202bfff6873SLukas Czerner sbi->s_li_request = elr; 320346e4690bSTao Ma /* 320446e4690bSTao Ma * set elr to NULL here since it has been inserted to 320546e4690bSTao Ma * the request_list and the removal and free of it is 320646e4690bSTao Ma * handled by ext4_clear_request_list from now on. 320746e4690bSTao Ma */ 320846e4690bSTao Ma elr = NULL; 3209bfff6873SLukas Czerner 3210bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3211bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3212bfff6873SLukas Czerner if (ret) 3213bfff6873SLukas Czerner goto out; 3214bfff6873SLukas Czerner } 3215bfff6873SLukas Czerner out: 3216bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3217beed5ecbSNicolas Kaiser if (ret) 3218bfff6873SLukas Czerner kfree(elr); 3219bfff6873SLukas Czerner return ret; 3220bfff6873SLukas Czerner } 3221bfff6873SLukas Czerner 3222bfff6873SLukas Czerner /* 3223bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3224bfff6873SLukas Czerner * module unload. 3225bfff6873SLukas Czerner */ 3226bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3227bfff6873SLukas Czerner { 3228bfff6873SLukas Czerner /* 3229bfff6873SLukas Czerner * If thread exited earlier 3230bfff6873SLukas Czerner * there's nothing to be done. 3231bfff6873SLukas Czerner */ 32328f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3233bfff6873SLukas Czerner return; 3234bfff6873SLukas Czerner 32358f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3236bfff6873SLukas Czerner } 3237bfff6873SLukas Czerner 323825ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 323925ed6e8aSDarrick J. Wong { 324025ed6e8aSDarrick J. Wong int ret = 1; 324125ed6e8aSDarrick J. Wong int compat, incompat; 324225ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 324325ed6e8aSDarrick J. Wong 32449aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3245db9ee220SDarrick J. Wong /* journal checksum v3 */ 324625ed6e8aSDarrick J. Wong compat = 0; 3247db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 324825ed6e8aSDarrick J. Wong } else { 324925ed6e8aSDarrick J. Wong /* journal checksum v1 */ 325025ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 325125ed6e8aSDarrick J. Wong incompat = 0; 325225ed6e8aSDarrick J. Wong } 325325ed6e8aSDarrick J. Wong 3254feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3255feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3256feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3257feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 325825ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 325925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 326025ed6e8aSDarrick J. Wong compat, 0, 326125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 326225ed6e8aSDarrick J. Wong incompat); 326325ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 326425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 326525ed6e8aSDarrick J. Wong compat, 0, 326625ed6e8aSDarrick J. Wong incompat); 326725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 326825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 326925ed6e8aSDarrick J. Wong } else { 3270feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3271feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 327225ed6e8aSDarrick J. Wong } 327325ed6e8aSDarrick J. Wong 327425ed6e8aSDarrick J. Wong return ret; 327525ed6e8aSDarrick J. Wong } 327625ed6e8aSDarrick J. Wong 3277952fc18eSTheodore Ts'o /* 3278952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3279952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3280952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3281952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3282952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3283952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3284952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3285952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3286952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3287952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3288952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3289952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3290952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3291952fc18eSTheodore Ts'o */ 3292952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3293952fc18eSTheodore Ts'o char *buf) 3294952fc18eSTheodore Ts'o { 3295952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3296952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3297952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3298952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3299952fc18eSTheodore Ts'o int s, j, count = 0; 3300952fc18eSTheodore Ts'o 33010548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 33020548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 33030548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 33040548bbb8STheodore Ts'o 3305952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3306952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3307952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3308952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3309952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3310952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3311952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3312952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3313952fc18eSTheodore Ts'o count++; 3314952fc18eSTheodore Ts'o } 3315952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3316952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3317952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3318952fc18eSTheodore Ts'o count++; 3319952fc18eSTheodore Ts'o } 3320952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3321952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3322952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3323952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3324952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3325952fc18eSTheodore Ts'o count++; 3326952fc18eSTheodore Ts'o } 3327952fc18eSTheodore Ts'o if (i != grp) 3328952fc18eSTheodore Ts'o continue; 3329952fc18eSTheodore Ts'o s = 0; 3330952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3331952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3332952fc18eSTheodore Ts'o count++; 3333952fc18eSTheodore Ts'o } 3334952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3335952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3336952fc18eSTheodore Ts'o count++; 3337952fc18eSTheodore Ts'o } 3338952fc18eSTheodore Ts'o } 3339952fc18eSTheodore Ts'o if (!count) 3340952fc18eSTheodore Ts'o return 0; 3341952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3342952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3343952fc18eSTheodore Ts'o } 3344952fc18eSTheodore Ts'o 3345952fc18eSTheodore Ts'o /* 3346952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3347952fc18eSTheodore Ts'o */ 3348952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3349952fc18eSTheodore Ts'o { 3350952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3351952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3352952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3353952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 33544fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3355952fc18eSTheodore Ts'o 3356952fc18eSTheodore Ts'o if (!buf) 3357952fc18eSTheodore Ts'o return -ENOMEM; 3358952fc18eSTheodore Ts'o 3359952fc18eSTheodore Ts'o /* 3360952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3361952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3362952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3363952fc18eSTheodore Ts'o */ 3364952fc18eSTheodore Ts'o 3365952fc18eSTheodore Ts'o /* 3366952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3367952fc18eSTheodore Ts'o */ 3368952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3369952fc18eSTheodore Ts'o 3370952fc18eSTheodore Ts'o /* 3371952fc18eSTheodore Ts'o * Add the overhead found in each block group 3372952fc18eSTheodore Ts'o */ 3373952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3374952fc18eSTheodore Ts'o int blks; 3375952fc18eSTheodore Ts'o 3376952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3377952fc18eSTheodore Ts'o overhead += blks; 3378952fc18eSTheodore Ts'o if (blks) 3379952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3380952fc18eSTheodore Ts'o cond_resched(); 3381952fc18eSTheodore Ts'o } 3382b003b524SEric Sandeen /* Add the internal journal blocks as well */ 3383b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3384810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33850875a2b4SEric Sandeen 3386952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3387952fc18eSTheodore Ts'o smp_wmb(); 3388952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3389952fc18eSTheodore Ts'o return 0; 3390952fc18eSTheodore Ts'o } 3391952fc18eSTheodore Ts'o 339227dd4385SLukas Czerner 339330fac0f7SJan Kara static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) 339427dd4385SLukas Czerner { 339527dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 339627dd4385SLukas Czerner 339727dd4385SLukas Czerner /* 339830fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 339930fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 340030fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 340130fac0f7SJan Kara * to keep ext2/3 backward compatibility. 340230fac0f7SJan Kara */ 340330fac0f7SJan Kara if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 340430fac0f7SJan Kara return 0; 340530fac0f7SJan Kara /* 340627dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 340727dd4385SLukas Czerner * This should cover the situations where we can not afford to run 340827dd4385SLukas Czerner * out of space like for example punch hole, or converting 3409556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 341027dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 341127dd4385SLukas Czerner * very rare. 341227dd4385SLukas Czerner */ 341330fac0f7SJan Kara resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> 341430fac0f7SJan Kara EXT4_SB(sb)->s_cluster_bits; 341527dd4385SLukas Czerner 341627dd4385SLukas Czerner do_div(resv_clusters, 50); 341727dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 341827dd4385SLukas Czerner 341927dd4385SLukas Czerner return resv_clusters; 342027dd4385SLukas Czerner } 342127dd4385SLukas Czerner 342227dd4385SLukas Czerner 342327dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) 342427dd4385SLukas Czerner { 342527dd4385SLukas Czerner ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> 342627dd4385SLukas Czerner sbi->s_cluster_bits; 342727dd4385SLukas Czerner 342827dd4385SLukas Czerner if (count >= clusters) 342927dd4385SLukas Czerner return -EINVAL; 343027dd4385SLukas Czerner 343127dd4385SLukas Czerner atomic64_set(&sbi->s_resv_clusters, count); 343227dd4385SLukas Czerner return 0; 343327dd4385SLukas Czerner } 343427dd4385SLukas Czerner 3435617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3436ac27a0ecSDave Kleikamp { 3437d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3438ac27a0ecSDave Kleikamp struct buffer_head *bh; 3439617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3440617ba13bSMingming Cao struct ext4_sb_info *sbi; 3441617ba13bSMingming Cao ext4_fsblk_t block; 3442617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 344370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3444ac27a0ecSDave Kleikamp unsigned long offset = 0; 3445ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3446ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3447ac27a0ecSDave Kleikamp struct inode *root; 34489f6200bbSTheodore Ts'o char *cp; 34490390131bSFrank Mayhar const char *descr; 3450dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3451281b5995STheodore Ts'o int blocksize, clustersize; 34524ec11028STheodore Ts'o unsigned int db_count; 34534ec11028STheodore Ts'o unsigned int i; 3454281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3455bd81d8eeSLaurent Vivier __u64 blocks_count; 345607aa2ea1SLukas Czerner int err = 0; 3457b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3458bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3459ac27a0ecSDave Kleikamp 3460ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3461ac27a0ecSDave Kleikamp if (!sbi) 3462dcc7dae3SCyrill Gorcunov goto out_free_orig; 3463705895b6SPekka Enberg 3464705895b6SPekka Enberg sbi->s_blockgroup_lock = 3465705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3466705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3467705895b6SPekka Enberg kfree(sbi); 3468dcc7dae3SCyrill Gorcunov goto out_free_orig; 3469705895b6SPekka Enberg } 3470ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34712c0544b2STheodore Ts'o sbi->s_sb = sb; 3472240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3473d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3474f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3475f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3476f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3477ac27a0ecSDave Kleikamp 34789f6200bbSTheodore Ts'o /* Cleanup superblock name */ 34799f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 34809f6200bbSTheodore Ts'o *cp = '!'; 34819f6200bbSTheodore Ts'o 348207aa2ea1SLukas Czerner /* -EINVAL is default */ 3483dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3484617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3485ac27a0ecSDave Kleikamp if (!blocksize) { 3486b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3487ac27a0ecSDave Kleikamp goto out_fail; 3488ac27a0ecSDave Kleikamp } 3489ac27a0ecSDave Kleikamp 3490ac27a0ecSDave Kleikamp /* 3491617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3492ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3493ac27a0ecSDave Kleikamp */ 3494617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 349570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 349670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3497ac27a0ecSDave Kleikamp } else { 349870bbb3e0SAndrew Morton logical_sb_block = sb_block; 3499ac27a0ecSDave Kleikamp } 3500ac27a0ecSDave Kleikamp 3501a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3502b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3503ac27a0ecSDave Kleikamp goto out_fail; 3504ac27a0ecSDave Kleikamp } 3505ac27a0ecSDave Kleikamp /* 3506ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3507617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3508ac27a0ecSDave Kleikamp */ 35092716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3510ac27a0ecSDave Kleikamp sbi->s_es = es; 3511ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3512617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3513617ba13bSMingming Cao goto cantfind_ext4; 3514afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3515ac27a0ecSDave Kleikamp 3516feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3517feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3518feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3519feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3520363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3521feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3522feb0ab32SDarrick J. Wong 3523d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3524d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3525d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3526d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3527d25425f8SDarrick J. Wong silent = 1; 3528d25425f8SDarrick J. Wong goto cantfind_ext4; 3529d25425f8SDarrick J. Wong } 3530d25425f8SDarrick J. Wong 35310441984aSDarrick J. Wong /* Load the checksum driver */ 35320441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 35330441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 35340441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 35350441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 35360441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 35370441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 35380441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 35390441984aSDarrick J. Wong goto failed_mount; 35400441984aSDarrick J. Wong } 35410441984aSDarrick J. Wong } 35420441984aSDarrick J. Wong 3543a9c47317SDarrick J. Wong /* Check superblock checksum */ 3544a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3545a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3546a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3547a9c47317SDarrick J. Wong silent = 1; 3548a9c47317SDarrick J. Wong goto cantfind_ext4; 3549a9c47317SDarrick J. Wong } 3550a9c47317SDarrick J. Wong 3551a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 35529aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) 3553a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3554a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3555a9c47317SDarrick J. Wong 3556ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3557ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3558fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3559617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3560fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 356187f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3562fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3563617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3564fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3565ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3566fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 356703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3568fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35692e7842b8SHugh Dickins #endif 357098c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 357198c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 357298c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 357398c1a759SDarrick J. Wong 3574617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3575fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3576617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3577fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3578617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3579fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3580ac27a0ecSDave Kleikamp 3581617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3582fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3583bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3584fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3585bb4f397aSAneesh Kumar K.V else 3586fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 358745f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3588fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35898b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3590fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3591ac27a0ecSDave Kleikamp 359208cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 359308cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 359430773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 359530773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 359630773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3597ac27a0ecSDave Kleikamp 35988b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3599fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3600ac27a0ecSDave Kleikamp 36011e2462f9SMingming Cao /* 3602dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3603dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3604dd919b98SAneesh Kumar K.V */ 3605bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 36068b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3607fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3608dd919b98SAneesh Kumar K.V 360951ce6511SLukas Czerner /* 361051ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 361151ce6511SLukas Czerner * no mount option specified. 361251ce6511SLukas Czerner */ 361351ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 361451ce6511SLukas Czerner 36158b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3616661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 36178b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 36188b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 36198b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 36208b67f04aSTheodore Ts'o } 36215a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3622b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3623661aa520SEric Sandeen &journal_ioprio, 0)) 3624ac27a0ecSDave Kleikamp goto failed_mount; 3625ac27a0ecSDave Kleikamp 362656889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 362756889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 362856889787STheodore Ts'o "with data=journal disables delayed " 362956889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 363056889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 363156889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 363256889787STheodore Ts'o "both data=journal and delalloc"); 363356889787STheodore Ts'o goto failed_mount; 363456889787STheodore Ts'o } 363556889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 363656889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 36376ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 363856889787STheodore Ts'o goto failed_mount; 363956889787STheodore Ts'o } 3640923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3641923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3642923ae0ffSRoss Zwisler "both data=journal and dax"); 3643923ae0ffSRoss Zwisler goto failed_mount; 3644923ae0ffSRoss Zwisler } 364556889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 364656889787STheodore Ts'o clear_opt(sb, DELALLOC); 364756889787STheodore Ts'o } 364856889787STheodore Ts'o 3649ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3650482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3651ac27a0ecSDave Kleikamp 3652617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3653617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3654617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3655617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3656b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3657b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3658b31e1552SEric Sandeen "running e2fsck is recommended"); 3659469108ffSTheodore Tso 3660ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3661ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3662ed3654ebSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, 3663ed3654ebSTheodore Ts'o EXT4_FEATURE_INCOMPAT_64BIT)) { 3664ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3665ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3666ed3654ebSTheodore Ts'o goto failed_mount; 3667ed3654ebSTheodore Ts'o } 3668ed3654ebSTheodore Ts'o } 3669ed3654ebSTheodore Ts'o 36702035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36712035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36722035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36732035e776STheodore Ts'o "using the ext4 subsystem"); 36742035e776STheodore Ts'o else { 36752035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36762035e776STheodore Ts'o "to feature incompatibilities"); 36772035e776STheodore Ts'o goto failed_mount; 36782035e776STheodore Ts'o } 36792035e776STheodore Ts'o } 36802035e776STheodore Ts'o 36812035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36822035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36832035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36842035e776STheodore Ts'o "using the ext4 subsystem"); 36852035e776STheodore Ts'o else { 36862035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36872035e776STheodore Ts'o "to feature incompatibilities"); 36882035e776STheodore Ts'o goto failed_mount; 36892035e776STheodore Ts'o } 36902035e776STheodore Ts'o } 36912035e776STheodore Ts'o 3692469108ffSTheodore Tso /* 3693ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3694ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3695ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3696ac27a0ecSDave Kleikamp */ 3697a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3698ac27a0ecSDave Kleikamp goto failed_mount; 3699a13fb1a4SEric Sandeen 3700261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3701617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3702617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3703b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3704b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3705ac27a0ecSDave Kleikamp goto failed_mount; 3706ac27a0ecSDave Kleikamp } 3707ac27a0ecSDave Kleikamp 3708923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 3709923ae0ffSRoss Zwisler if (blocksize != PAGE_SIZE) { 3710923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, 3711923ae0ffSRoss Zwisler "error: unsupported blocksize for dax"); 3712923ae0ffSRoss Zwisler goto failed_mount; 3713923ae0ffSRoss Zwisler } 3714923ae0ffSRoss Zwisler if (!sb->s_bdev->bd_disk->fops->direct_access) { 3715923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, 3716923ae0ffSRoss Zwisler "error: device does not support dax"); 3717923ae0ffSRoss Zwisler goto failed_mount; 3718923ae0ffSRoss Zwisler } 3719923ae0ffSRoss Zwisler } 3720923ae0ffSRoss Zwisler 37216ddb2447STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT) && 37226ddb2447STheodore Ts'o es->s_encryption_level) { 37236ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 37246ddb2447STheodore Ts'o es->s_encryption_level); 37256ddb2447STheodore Ts'o goto failed_mount; 37266ddb2447STheodore Ts'o } 37276ddb2447STheodore Ts'o 3728ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3729ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3730ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3731b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3732ce40733cSAneesh Kumar K.V blocksize); 3733ac27a0ecSDave Kleikamp goto failed_mount; 3734ac27a0ecSDave Kleikamp } 3735ac27a0ecSDave Kleikamp 3736ac27a0ecSDave Kleikamp brelse(bh); 373770bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 373870bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3739a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3740ac27a0ecSDave Kleikamp if (!bh) { 3741b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3742b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3743ac27a0ecSDave Kleikamp goto failed_mount; 3744ac27a0ecSDave Kleikamp } 37452716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3746ac27a0ecSDave Kleikamp sbi->s_es = es; 3747617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3748b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3749b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3750ac27a0ecSDave Kleikamp goto failed_mount; 3751ac27a0ecSDave Kleikamp } 3752ac27a0ecSDave Kleikamp } 3753ac27a0ecSDave Kleikamp 3754a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3755a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3756f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3757f287a1a5STheodore Ts'o has_huge_files); 3758f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3759ac27a0ecSDave Kleikamp 3760617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3761617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3762617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3763ac27a0ecSDave Kleikamp } else { 3764ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3765ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3766617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 37671330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3768ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3769b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3770b31e1552SEric Sandeen "unsupported inode size: %d", 3771ac27a0ecSDave Kleikamp sbi->s_inode_size); 3772ac27a0ecSDave Kleikamp goto failed_mount; 3773ac27a0ecSDave Kleikamp } 3774ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3775ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3776ac27a0ecSDave Kleikamp } 37770b8e58a1SAndreas Dilger 37780d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 37790d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 37808fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 37810d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3782d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3783b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3784b31e1552SEric Sandeen "unsupported descriptor size %lu", 37850d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37860d1ee42fSAlexandre Ratchov goto failed_mount; 37870d1ee42fSAlexandre Ratchov } 37880d1ee42fSAlexandre Ratchov } else 37890d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37900b8e58a1SAndreas Dilger 3791ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3792ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3793b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3794617ba13bSMingming Cao goto cantfind_ext4; 37950b8e58a1SAndreas Dilger 3796617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3797ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3798617ba13bSMingming Cao goto cantfind_ext4; 3799ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3800ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 38010d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3802ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3803ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3804e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3805e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 38060b8e58a1SAndreas Dilger 3807ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3808ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3809ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 381023301410STheodore Ts'o if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { 3811f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3812f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3813f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3814f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3815f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 381623301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 381723301410STheodore Ts'o es->s_flags |= 381823301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3819f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3820f99b2589STheodore Ts'o #else 382123301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 382223301410STheodore Ts'o es->s_flags |= 382323301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3824f99b2589STheodore Ts'o #endif 3825f99b2589STheodore Ts'o } 382623301410STheodore Ts'o } 3827ac27a0ecSDave Kleikamp 3828281b5995STheodore Ts'o /* Handle clustersize */ 3829281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3830281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3831281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3832281b5995STheodore Ts'o if (has_bigalloc) { 3833281b5995STheodore Ts'o if (clustersize < blocksize) { 3834281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3835281b5995STheodore Ts'o "cluster size (%d) smaller than " 3836281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3837281b5995STheodore Ts'o goto failed_mount; 3838281b5995STheodore Ts'o } 3839281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3840281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3841281b5995STheodore Ts'o sbi->s_clusters_per_group = 3842281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3843281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3844281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3845281b5995STheodore Ts'o "#clusters per group too big: %lu", 3846281b5995STheodore Ts'o sbi->s_clusters_per_group); 3847281b5995STheodore Ts'o goto failed_mount; 3848281b5995STheodore Ts'o } 3849281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3850281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3851281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3852281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3853281b5995STheodore Ts'o sbi->s_blocks_per_group, 3854281b5995STheodore Ts'o sbi->s_clusters_per_group); 3855281b5995STheodore Ts'o goto failed_mount; 3856281b5995STheodore Ts'o } 3857281b5995STheodore Ts'o } else { 3858281b5995STheodore Ts'o if (clustersize != blocksize) { 3859281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3860281b5995STheodore Ts'o "block size (%d)", clustersize, 3861281b5995STheodore Ts'o blocksize); 3862281b5995STheodore Ts'o clustersize = blocksize; 3863281b5995STheodore Ts'o } 3864ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3865b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3866b31e1552SEric Sandeen "#blocks per group too big: %lu", 3867ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3868ac27a0ecSDave Kleikamp goto failed_mount; 3869ac27a0ecSDave Kleikamp } 3870281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3871281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3872281b5995STheodore Ts'o } 3873281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3874281b5995STheodore Ts'o 3875ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3876b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3877b31e1552SEric Sandeen "#inodes per group too big: %lu", 3878ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3879ac27a0ecSDave Kleikamp goto failed_mount; 3880ac27a0ecSDave Kleikamp } 3881ac27a0ecSDave Kleikamp 3882960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3883960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3884960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3885960fd856STheodore Ts'o 3886bf43d84bSEric Sandeen /* 3887bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3888bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3889bf43d84bSEric Sandeen */ 38905a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 389130ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38925a9ae68aSDarrick J. Wong if (err) { 3893b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3894bf43d84bSEric Sandeen " too large to mount safely on this system"); 3895ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 389690c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3897ac27a0ecSDave Kleikamp goto failed_mount; 3898ac27a0ecSDave Kleikamp } 3899ac27a0ecSDave Kleikamp 3900617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3901617ba13bSMingming Cao goto cantfind_ext4; 3902e7c95593SEric Sandeen 39030f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 39040f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 39050f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3906b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3907b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 39080f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 39090f2ddca6SFrom: Thiemo Nagel goto failed_mount; 39100f2ddca6SFrom: Thiemo Nagel } 39110f2ddca6SFrom: Thiemo Nagel 39124ec11028STheodore Ts'o /* 39134ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 39144ec11028STheodore Ts'o * of the filesystem. 39154ec11028STheodore Ts'o */ 39164ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3917b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3918b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3919e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 39204ec11028STheodore Ts'o ext4_blocks_count(es)); 3921e7c95593SEric Sandeen goto failed_mount; 3922e7c95593SEric Sandeen } 3923bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3924bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3925bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3926bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 39274ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3928b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 39294ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3930b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 39314ec11028STheodore Ts'o ext4_blocks_count(es), 39324ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 39334ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 39344ec11028STheodore Ts'o goto failed_mount; 39354ec11028STheodore Ts'o } 3936bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3937fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3938fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3939617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3940617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3941f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3942f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3943ac27a0ecSDave Kleikamp GFP_KERNEL); 3944ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3945b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 39462cde417dSTheodore Ts'o ret = -ENOMEM; 3947ac27a0ecSDave Kleikamp goto failed_mount; 3948ac27a0ecSDave Kleikamp } 3949ac27a0ecSDave Kleikamp 39509f6200bbSTheodore Ts'o if (ext4_proc_root) 39519f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3952240799cdSTheodore Ts'o 395366acdcf4STheodore Ts'o if (sbi->s_proc) 395466acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 395566acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 395666acdcf4STheodore Ts'o 3957705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3958ac27a0ecSDave Kleikamp 3959ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 396070bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3961a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3962ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3963b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3964b31e1552SEric Sandeen "can't read group descriptor %d", i); 3965ac27a0ecSDave Kleikamp db_count = i; 3966ac27a0ecSDave Kleikamp goto failed_mount2; 3967ac27a0ecSDave Kleikamp } 3968ac27a0ecSDave Kleikamp } 3969bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3970b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3971f9ae9cf5STheodore Ts'o goto failed_mount2; 3972ac27a0ecSDave Kleikamp } 3973772cb7c8SJose R. Santos 3974f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3975ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3976ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3977ac27a0ecSDave Kleikamp 397804ecddb7SJan Mrazek setup_timer(&sbi->s_err_report, print_daily_error_info, 397904ecddb7SJan Mrazek (unsigned long) sb); 398004496411STao Ma 3981a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3982eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3983ce7e010aSTheodore Ts'o goto failed_mount3; 3984ce7e010aSTheodore Ts'o 3985c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 398667a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3987c9de560dSAlex Tomas 3988f9ae9cf5STheodore Ts'o /* 3989f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3990f9ae9cf5STheodore Ts'o */ 3991f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3992617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3993617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3994ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3995617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3996262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 39971fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 3998262b4662SJan Kara else 3999262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 400096c7e0d9SJan Kara sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 4001ac27a0ecSDave Kleikamp #endif 4002f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4003f2fa2ffcSAneesh Kumar K.V 4004ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 40053b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4006ac27a0ecSDave Kleikamp 4007ac27a0ecSDave Kleikamp sb->s_root = NULL; 4008ac27a0ecSDave Kleikamp 4009ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 4010617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 4011617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 4012ac27a0ecSDave Kleikamp 4013c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 4014c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 4015c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 401650460fe8SDarrick J. Wong goto failed_mount3a; 4017c5e06d10SJohann Lombardi 4018ac27a0ecSDave Kleikamp /* 4019ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4020ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4021ac27a0ecSDave Kleikamp */ 4022ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 4023617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 4024617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 402550460fe8SDarrick J. Wong goto failed_mount3a; 40260390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 40270390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4028b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4029b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4030744692dcSJiaying Zhang goto failed_mount_wq; 4031ac27a0ecSDave Kleikamp } else { 4032fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 40330390131bSFrank Mayhar sbi->s_journal = NULL; 40340390131bSFrank Mayhar needs_recovery = 0; 40350390131bSFrank Mayhar goto no_journal; 4036ac27a0ecSDave Kleikamp } 4037ac27a0ecSDave Kleikamp 4038f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 4039eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4040eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4041b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4042744692dcSJiaying Zhang goto failed_mount_wq; 4043eb40a09cSJose R. Santos } 4044eb40a09cSJose R. Santos 404525ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 404625ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 404725ed6e8aSDarrick J. Wong "feature set"); 404825ed6e8aSDarrick J. Wong goto failed_mount_wq; 4049d4da6c9cSLinus Torvalds } 4050818d276cSGirish Shilamkar 4051ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4052ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4053ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4054ac27a0ecSDave Kleikamp case 0: 4055ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 405663f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 405763f57933SAndrew Morton * cope, else JOURNAL_DATA 405863f57933SAndrew Morton */ 4059dab291afSMingming Cao if (jbd2_journal_check_available_features 4060dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 4061fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4062ac27a0ecSDave Kleikamp else 4063fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4064ac27a0ecSDave Kleikamp break; 4065ac27a0ecSDave Kleikamp 4066617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4067617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4068dab291afSMingming Cao if (!jbd2_journal_check_available_features 4069dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4070b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4071b31e1552SEric Sandeen "requested data journaling mode"); 4072744692dcSJiaying Zhang goto failed_mount_wq; 4073ac27a0ecSDave Kleikamp } 4074ac27a0ecSDave Kleikamp default: 4075ac27a0ecSDave Kleikamp break; 4076ac27a0ecSDave Kleikamp } 4077b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4078ac27a0ecSDave Kleikamp 407918aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 408018aadd47SBobi Jam 4081ce7e010aSTheodore Ts'o no_journal: 40829c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 40839c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 40849c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40859c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40869c191f70ST Makphaibulchoke goto failed_mount_wq; 40879c191f70ST Makphaibulchoke } 40889c191f70ST Makphaibulchoke } 40899c191f70ST Makphaibulchoke 40901cb767cdSTheodore Ts'o if ((DUMMY_ENCRYPTION_ENABLED(sbi) || 40911cb767cdSTheodore Ts'o EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT)) && 40921cb767cdSTheodore Ts'o (blocksize != PAGE_CACHE_SIZE)) { 40931cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 40941cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 40951cb767cdSTheodore Ts'o goto failed_mount_wq; 40961cb767cdSTheodore Ts'o } 40971cb767cdSTheodore Ts'o 40981cb767cdSTheodore Ts'o if (DUMMY_ENCRYPTION_ENABLED(sbi) && 40996ddb2447STheodore Ts'o !(sb->s_flags & MS_RDONLY) && 41006ddb2447STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT)) { 41016ddb2447STheodore Ts'o EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT); 41026ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 41036ddb2447STheodore Ts'o } 41046ddb2447STheodore Ts'o 4105fd89d5f2STejun Heo /* 4106952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4107952fc18eSTheodore Ts'o * superblock if present. 4108952fc18eSTheodore Ts'o */ 4109952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4110952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4111952fc18eSTheodore Ts'o else { 411207aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 411307aa2ea1SLukas Czerner if (err) 4114952fc18eSTheodore Ts'o goto failed_mount_wq; 4115952fc18eSTheodore Ts'o } 4116952fc18eSTheodore Ts'o 4117952fc18eSTheodore Ts'o /* 4118fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4119fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4120fd89d5f2STejun Heo */ 41212e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 41222e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 41232e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 41242e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 412507aa2ea1SLukas Czerner ret = -ENOMEM; 41262e8fa54eSJan Kara goto failed_mount4; 41272e8fa54eSJan Kara } 41282e8fa54eSJan Kara 4129ac27a0ecSDave Kleikamp /* 4130dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4131ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4132ac27a0ecSDave Kleikamp */ 4133ac27a0ecSDave Kleikamp 41341d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 41351d1fe1eeSDavid Howells if (IS_ERR(root)) { 4136b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 41371d1fe1eeSDavid Howells ret = PTR_ERR(root); 413832a9bb57SManish Katiyar root = NULL; 4139ac27a0ecSDave Kleikamp goto failed_mount4; 4140ac27a0ecSDave Kleikamp } 4141ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4142b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 414394bf608aSAl Viro iput(root); 4144ac27a0ecSDave Kleikamp goto failed_mount4; 4145ac27a0ecSDave Kleikamp } 414648fde701SAl Viro sb->s_root = d_make_root(root); 41471d1fe1eeSDavid Howells if (!sb->s_root) { 4148b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 41491d1fe1eeSDavid Howells ret = -ENOMEM; 41501d1fe1eeSDavid Howells goto failed_mount4; 41511d1fe1eeSDavid Howells } 4152ac27a0ecSDave Kleikamp 41537e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 41547e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4155ef7f3835SKalpak Shah 4156ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4157ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 4158ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4159ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4160ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 4161ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 4162ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4163ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4164ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4165ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4166ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4167ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4168ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4169ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4170ef7f3835SKalpak Shah } 4171ef7f3835SKalpak Shah } 4172ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4173ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4174ef7f3835SKalpak Shah sbi->s_inode_size) { 4175ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4176ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4177b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4178b31e1552SEric Sandeen "available"); 4179ef7f3835SKalpak Shah } 4180ef7f3835SKalpak Shah 418130fac0f7SJan Kara err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); 418227dd4385SLukas Czerner if (err) { 418327dd4385SLukas Czerner ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " 418430fac0f7SJan Kara "reserved pool", ext4_calculate_resv_clusters(sb)); 4185f9ae9cf5STheodore Ts'o goto failed_mount4a; 418627dd4385SLukas Czerner } 418727dd4385SLukas Czerner 41886fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 41896fd058f7STheodore Ts'o if (err) { 4190b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4191fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4192f9ae9cf5STheodore Ts'o goto failed_mount4a; 4193f9ae9cf5STheodore Ts'o } 4194f9ae9cf5STheodore Ts'o 4195f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4196f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4197f9ae9cf5STheodore Ts'o if (err) { 4198f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4199f9ae9cf5STheodore Ts'o err); 4200dcf2d804STao Ma goto failed_mount5; 4201c2774d84SAneesh Kumar K.V } 4202c2774d84SAneesh Kumar K.V 4203d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4204d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4205d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4206908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4207908c7f19STejun Heo GFP_KERNEL); 4208d5e03cbbSTheodore Ts'o if (!err) { 4209d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4210d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4211908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4212908c7f19STejun Heo GFP_KERNEL); 4213d5e03cbbSTheodore Ts'o } 4214d5e03cbbSTheodore Ts'o if (!err) 4215d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4216908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4217d5e03cbbSTheodore Ts'o if (!err) 4218908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4219908c7f19STejun Heo GFP_KERNEL); 4220d5e03cbbSTheodore Ts'o if (err) { 4221d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4222d5e03cbbSTheodore Ts'o goto failed_mount6; 4223d5e03cbbSTheodore Ts'o } 4224d5e03cbbSTheodore Ts'o 4225d5e03cbbSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 4226d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4227d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4228d5e03cbbSTheodore Ts'o "unable to initialize " 4229d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4230d5e03cbbSTheodore Ts'o goto failed_mount6; 4231d5e03cbbSTheodore Ts'o } 4232d5e03cbbSTheodore Ts'o 4233bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4234bfff6873SLukas Czerner if (err) 4235dcf2d804STao Ma goto failed_mount6; 4236bfff6873SLukas Czerner 42373197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 42383197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 42393197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 42403197ebdbSTheodore Ts'o "%s", sb->s_id); 4241dcf2d804STao Ma if (err) 4242dcf2d804STao Ma goto failed_mount7; 42433197ebdbSTheodore Ts'o 42449b2ff357SJan Kara #ifdef CONFIG_QUOTA 42459b2ff357SJan Kara /* Enable quota usage during mount. */ 42469b2ff357SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 42479b2ff357SJan Kara !(sb->s_flags & MS_RDONLY)) { 42489b2ff357SJan Kara err = ext4_enable_quotas(sb); 42499b2ff357SJan Kara if (err) 42509b2ff357SJan Kara goto failed_mount8; 42519b2ff357SJan Kara } 42529b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 42539b2ff357SJan Kara 4254617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4255617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4256617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 42570390131bSFrank Mayhar if (needs_recovery) { 4258b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4259617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 42600390131bSFrank Mayhar } 42610390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 42620390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 42630390131bSFrank Mayhar descr = " journalled data mode"; 42640390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 42650390131bSFrank Mayhar descr = " ordered data mode"; 42660390131bSFrank Mayhar else 42670390131bSFrank Mayhar descr = " writeback data mode"; 42680390131bSFrank Mayhar } else 42690390131bSFrank Mayhar descr = "out journal"; 42700390131bSFrank Mayhar 427179add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 427279add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 427379add3a3SLukas Czerner if (!blk_queue_discard(q)) 427479add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 427579add3a3SLukas Czerner "mounting with \"discard\" option, but " 427679add3a3SLukas Czerner "the device does not support discard"); 427779add3a3SLukas Czerner } 427879add3a3SLukas Czerner 4279d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 42808b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 42818b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4282ac27a0ecSDave Kleikamp 428366e61a9eSTheodore Ts'o if (es->s_error_count) 428466e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4285ac27a0ecSDave Kleikamp 4286efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4287efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4288efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4289efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4290efbed4dcSTheodore Ts'o 4291d4c402d9SCurt Wohlgemuth kfree(orig_data); 4292ac27a0ecSDave Kleikamp return 0; 4293ac27a0ecSDave Kleikamp 4294617ba13bSMingming Cao cantfind_ext4: 4295ac27a0ecSDave Kleikamp if (!silent) 4296b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4297ac27a0ecSDave Kleikamp goto failed_mount; 4298ac27a0ecSDave Kleikamp 429972ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 430072ba7450STheodore Ts'o failed_mount8: 430172ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 430272ba7450STheodore Ts'o #endif 4303dcf2d804STao Ma failed_mount7: 4304dcf2d804STao Ma ext4_unregister_li_request(sb); 4305dcf2d804STao Ma failed_mount6: 4306f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4307d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4308b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4309d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4310d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4311d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4312d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 431300764937SAzat Khuzhin failed_mount5: 4314f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4315f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4316f9ae9cf5STheodore Ts'o failed_mount4a: 431794bf608aSAl Viro dput(sb->s_root); 431832a9bb57SManish Katiyar sb->s_root = NULL; 431994bf608aSAl Viro failed_mount4: 4320b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 43212e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 43222e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 43234c0425ffSMingming Cao failed_mount_wq: 43240390131bSFrank Mayhar if (sbi->s_journal) { 4325dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 432647b4a50bSJan Kara sbi->s_journal = NULL; 43270390131bSFrank Mayhar } 432850460fe8SDarrick J. Wong failed_mount3a: 4329d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4330eb68d0e2SZheng Liu failed_mount3: 43319105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4332c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4333c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4334ac27a0ecSDave Kleikamp failed_mount2: 4335ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4336ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4337b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4338ac27a0ecSDave Kleikamp failed_mount: 43390441984aSDarrick J. Wong if (sbi->s_chksum_driver) 43400441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4341240799cdSTheodore Ts'o if (sbi->s_proc) { 434266acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 43439f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4344240799cdSTheodore Ts'o } 4345ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4346a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4347ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4348ac27a0ecSDave Kleikamp #endif 4349617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4350ac27a0ecSDave Kleikamp brelse(bh); 4351ac27a0ecSDave Kleikamp out_fail: 4352ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4353f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4354ac27a0ecSDave Kleikamp kfree(sbi); 4355dcc7dae3SCyrill Gorcunov out_free_orig: 4356d4c402d9SCurt Wohlgemuth kfree(orig_data); 435707aa2ea1SLukas Czerner return err ? err : ret; 4358ac27a0ecSDave Kleikamp } 4359ac27a0ecSDave Kleikamp 4360ac27a0ecSDave Kleikamp /* 4361ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4362ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4363ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4364ac27a0ecSDave Kleikamp */ 4365617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4366ac27a0ecSDave Kleikamp { 4367617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4368ac27a0ecSDave Kleikamp 4369ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 437030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 437130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4372ac27a0ecSDave Kleikamp 4373a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4374ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4375dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4376ac27a0ecSDave Kleikamp else 4377dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 43785bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 43795bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 43805bf5683aSHidehiro Kawai else 43815bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4382a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4383ac27a0ecSDave Kleikamp } 4384ac27a0ecSDave Kleikamp 4385617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4386ac27a0ecSDave Kleikamp unsigned int journal_inum) 4387ac27a0ecSDave Kleikamp { 4388ac27a0ecSDave Kleikamp struct inode *journal_inode; 4389ac27a0ecSDave Kleikamp journal_t *journal; 4390ac27a0ecSDave Kleikamp 43910390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43920390131bSFrank Mayhar 4393ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4394ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4395ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4396ac27a0ecSDave Kleikamp 43971d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43981d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4399b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4400ac27a0ecSDave Kleikamp return NULL; 4401ac27a0ecSDave Kleikamp } 4402ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4403ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4404ac27a0ecSDave Kleikamp iput(journal_inode); 4405b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4406ac27a0ecSDave Kleikamp return NULL; 4407ac27a0ecSDave Kleikamp } 4408ac27a0ecSDave Kleikamp 4409e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4410ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 44111d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4412b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4413ac27a0ecSDave Kleikamp iput(journal_inode); 4414ac27a0ecSDave Kleikamp return NULL; 4415ac27a0ecSDave Kleikamp } 4416ac27a0ecSDave Kleikamp 4417dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4418ac27a0ecSDave Kleikamp if (!journal) { 4419b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4420ac27a0ecSDave Kleikamp iput(journal_inode); 4421ac27a0ecSDave Kleikamp return NULL; 4422ac27a0ecSDave Kleikamp } 4423ac27a0ecSDave Kleikamp journal->j_private = sb; 4424617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4425ac27a0ecSDave Kleikamp return journal; 4426ac27a0ecSDave Kleikamp } 4427ac27a0ecSDave Kleikamp 4428617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4429ac27a0ecSDave Kleikamp dev_t j_dev) 4430ac27a0ecSDave Kleikamp { 4431ac27a0ecSDave Kleikamp struct buffer_head *bh; 4432ac27a0ecSDave Kleikamp journal_t *journal; 4433617ba13bSMingming Cao ext4_fsblk_t start; 4434617ba13bSMingming Cao ext4_fsblk_t len; 4435ac27a0ecSDave Kleikamp int hblock, blocksize; 4436617ba13bSMingming Cao ext4_fsblk_t sb_block; 4437ac27a0ecSDave Kleikamp unsigned long offset; 4438617ba13bSMingming Cao struct ext4_super_block *es; 4439ac27a0ecSDave Kleikamp struct block_device *bdev; 4440ac27a0ecSDave Kleikamp 44410390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44420390131bSFrank Mayhar 4443b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4444ac27a0ecSDave Kleikamp if (bdev == NULL) 4445ac27a0ecSDave Kleikamp return NULL; 4446ac27a0ecSDave Kleikamp 4447ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4448e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4449ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4450b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4451b31e1552SEric Sandeen "blocksize too small for journal device"); 4452ac27a0ecSDave Kleikamp goto out_bdev; 4453ac27a0ecSDave Kleikamp } 4454ac27a0ecSDave Kleikamp 4455617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4456617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4457ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4458ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4459b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4460b31e1552SEric Sandeen "external journal"); 4461ac27a0ecSDave Kleikamp goto out_bdev; 4462ac27a0ecSDave Kleikamp } 4463ac27a0ecSDave Kleikamp 44642716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4465617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4466ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4467617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4468b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4469b31e1552SEric Sandeen "bad superblock"); 4470ac27a0ecSDave Kleikamp brelse(bh); 4471ac27a0ecSDave Kleikamp goto out_bdev; 4472ac27a0ecSDave Kleikamp } 4473ac27a0ecSDave Kleikamp 4474df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4475df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4476df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4477df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4478df4763beSDarrick J. Wong "corrupt superblock"); 4479df4763beSDarrick J. Wong brelse(bh); 4480df4763beSDarrick J. Wong goto out_bdev; 4481df4763beSDarrick J. Wong } 4482df4763beSDarrick J. Wong 4483617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4484b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4485ac27a0ecSDave Kleikamp brelse(bh); 4486ac27a0ecSDave Kleikamp goto out_bdev; 4487ac27a0ecSDave Kleikamp } 4488ac27a0ecSDave Kleikamp 4489bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4490ac27a0ecSDave Kleikamp start = sb_block + 1; 4491ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4492ac27a0ecSDave Kleikamp 4493dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4494ac27a0ecSDave Kleikamp start, len, blocksize); 4495ac27a0ecSDave Kleikamp if (!journal) { 4496b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4497ac27a0ecSDave Kleikamp goto out_bdev; 4498ac27a0ecSDave Kleikamp } 4499ac27a0ecSDave Kleikamp journal->j_private = sb; 45009f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4501ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4502ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4503b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4504ac27a0ecSDave Kleikamp goto out_journal; 4505ac27a0ecSDave Kleikamp } 4506ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4507b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4508b31e1552SEric Sandeen "user (unsupported) - %d", 4509ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4510ac27a0ecSDave Kleikamp goto out_journal; 4511ac27a0ecSDave Kleikamp } 4512617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4513617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4514ac27a0ecSDave Kleikamp return journal; 45150b8e58a1SAndreas Dilger 4516ac27a0ecSDave Kleikamp out_journal: 4517dab291afSMingming Cao jbd2_journal_destroy(journal); 4518ac27a0ecSDave Kleikamp out_bdev: 4519617ba13bSMingming Cao ext4_blkdev_put(bdev); 4520ac27a0ecSDave Kleikamp return NULL; 4521ac27a0ecSDave Kleikamp } 4522ac27a0ecSDave Kleikamp 4523617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4524617ba13bSMingming Cao struct ext4_super_block *es, 4525ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4526ac27a0ecSDave Kleikamp { 4527ac27a0ecSDave Kleikamp journal_t *journal; 4528ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4529ac27a0ecSDave Kleikamp dev_t journal_dev; 4530ac27a0ecSDave Kleikamp int err = 0; 4531ac27a0ecSDave Kleikamp int really_read_only; 4532ac27a0ecSDave Kleikamp 45330390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 45340390131bSFrank Mayhar 4535ac27a0ecSDave Kleikamp if (journal_devnum && 4536ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4537b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4538b31e1552SEric Sandeen "numbers have changed"); 4539ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4540ac27a0ecSDave Kleikamp } else 4541ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4542ac27a0ecSDave Kleikamp 4543ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4544ac27a0ecSDave Kleikamp 4545ac27a0ecSDave Kleikamp /* 4546ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4547ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4548ac27a0ecSDave Kleikamp * can get read-write access to the device. 4549ac27a0ecSDave Kleikamp */ 4550617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4551ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4552b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4553b31e1552SEric Sandeen "required on readonly filesystem"); 4554ac27a0ecSDave Kleikamp if (really_read_only) { 4555b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4556b31e1552SEric Sandeen "unavailable, cannot proceed"); 4557ac27a0ecSDave Kleikamp return -EROFS; 4558ac27a0ecSDave Kleikamp } 4559b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4560b31e1552SEric Sandeen "be enabled during recovery"); 4561ac27a0ecSDave Kleikamp } 4562ac27a0ecSDave Kleikamp } 4563ac27a0ecSDave Kleikamp 4564ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4565b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4566b31e1552SEric Sandeen "and inode journals!"); 4567ac27a0ecSDave Kleikamp return -EINVAL; 4568ac27a0ecSDave Kleikamp } 4569ac27a0ecSDave Kleikamp 4570ac27a0ecSDave Kleikamp if (journal_inum) { 4571617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4572ac27a0ecSDave Kleikamp return -EINVAL; 4573ac27a0ecSDave Kleikamp } else { 4574617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4575ac27a0ecSDave Kleikamp return -EINVAL; 4576ac27a0ecSDave Kleikamp } 4577ac27a0ecSDave Kleikamp 457890576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4579b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 45804776004fSTheodore Ts'o 4581617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4582dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 45831c13d5c0STheodore Ts'o if (!err) { 45841c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 45851c13d5c0STheodore Ts'o if (save) 45861c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 45871c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4588dab291afSMingming Cao err = jbd2_journal_load(journal); 45891c13d5c0STheodore Ts'o if (save) 45901c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 45911c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 45921c13d5c0STheodore Ts'o kfree(save); 45931c13d5c0STheodore Ts'o } 4594ac27a0ecSDave Kleikamp 4595ac27a0ecSDave Kleikamp if (err) { 4596b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4597dab291afSMingming Cao jbd2_journal_destroy(journal); 4598ac27a0ecSDave Kleikamp return err; 4599ac27a0ecSDave Kleikamp } 4600ac27a0ecSDave Kleikamp 4601617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4602617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4603ac27a0ecSDave Kleikamp 4604c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4605ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4606ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4607ac27a0ecSDave Kleikamp 4608ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4609e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4610ac27a0ecSDave Kleikamp } 4611ac27a0ecSDave Kleikamp 4612ac27a0ecSDave Kleikamp return 0; 4613ac27a0ecSDave Kleikamp } 4614ac27a0ecSDave Kleikamp 4615e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4616ac27a0ecSDave Kleikamp { 4617e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4618617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4619c4be0c1dSTakashi Sato int error = 0; 4620ac27a0ecSDave Kleikamp 462108439fecSChristoph Hellwig if (!sbh) 4622c4be0c1dSTakashi Sato return error; 4623914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4624914258bfSTheodore Ts'o /* 4625914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4626914258bfSTheodore Ts'o * superblock failed. This could happen because the 4627914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4628914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4629914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4630914258bfSTheodore Ts'o * write and hope for the best. 4631914258bfSTheodore Ts'o */ 4632b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4633b31e1552SEric Sandeen "superblock detected"); 4634914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4635914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4636914258bfSTheodore Ts'o } 463771290b36STheodore Ts'o /* 463871290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 463971290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 464071290b36STheodore Ts'o * write time when we are mounting the root file system 464171290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 464271290b36STheodore Ts'o * for people who are east of GMT and who make their clock 464371290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 464471290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 464571290b36STheodore Ts'o * to complain and force a full file system check. 464671290b36STheodore Ts'o */ 464771290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4648ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4649f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4650afc32f7eSTheodore Ts'o es->s_kbytes_written = 4651afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4652afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4653afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4654f613dfcbSTheodore Ts'o else 4655f613dfcbSTheodore Ts'o es->s_kbytes_written = 4656f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4657d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 465857042651STheodore Ts'o ext4_free_blocks_count_set(es, 465957042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 466057042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4661d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 46627f93cff9STheodore Ts'o es->s_free_inodes_count = 46637f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 46645d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4665ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 466606db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4667ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4668914258bfSTheodore Ts'o if (sync) { 4669c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4670c4be0c1dSTakashi Sato if (error) 4671c4be0c1dSTakashi Sato return error; 4672c4be0c1dSTakashi Sato 4673c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4674c4be0c1dSTakashi Sato if (error) { 4675b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4676b31e1552SEric Sandeen "superblock"); 4677914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4678914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4679914258bfSTheodore Ts'o } 4680914258bfSTheodore Ts'o } 4681c4be0c1dSTakashi Sato return error; 4682ac27a0ecSDave Kleikamp } 4683ac27a0ecSDave Kleikamp 4684ac27a0ecSDave Kleikamp /* 4685ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4686ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4687ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4688ac27a0ecSDave Kleikamp */ 4689617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4690617ba13bSMingming Cao struct ext4_super_block *es) 4691ac27a0ecSDave Kleikamp { 4692617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4693ac27a0ecSDave Kleikamp 46940390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 46950390131bSFrank Mayhar BUG_ON(journal != NULL); 46960390131bSFrank Mayhar return; 46970390131bSFrank Mayhar } 4698dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46997ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 47007ffe1ea8SHidehiro Kawai goto out; 47017ffe1ea8SHidehiro Kawai 4702617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4703ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4704617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4705e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4706ac27a0ecSDave Kleikamp } 47077ffe1ea8SHidehiro Kawai 47087ffe1ea8SHidehiro Kawai out: 4709dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4710ac27a0ecSDave Kleikamp } 4711ac27a0ecSDave Kleikamp 4712ac27a0ecSDave Kleikamp /* 4713ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4714ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4715ac27a0ecSDave Kleikamp * main filesystem now. 4716ac27a0ecSDave Kleikamp */ 4717617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4718617ba13bSMingming Cao struct ext4_super_block *es) 4719ac27a0ecSDave Kleikamp { 4720ac27a0ecSDave Kleikamp journal_t *journal; 4721ac27a0ecSDave Kleikamp int j_errno; 4722ac27a0ecSDave Kleikamp const char *errstr; 4723ac27a0ecSDave Kleikamp 47240390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 47250390131bSFrank Mayhar 4726617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4727ac27a0ecSDave Kleikamp 4728ac27a0ecSDave Kleikamp /* 4729ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4730617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4731ac27a0ecSDave Kleikamp */ 4732ac27a0ecSDave Kleikamp 4733dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4734ac27a0ecSDave Kleikamp if (j_errno) { 4735ac27a0ecSDave Kleikamp char nbuf[16]; 4736ac27a0ecSDave Kleikamp 4737617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 473812062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4739ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 474012062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4741ac27a0ecSDave Kleikamp 4742617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4743617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4744e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4745ac27a0ecSDave Kleikamp 4746dab291afSMingming Cao jbd2_journal_clear_err(journal); 4747d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4748ac27a0ecSDave Kleikamp } 4749ac27a0ecSDave Kleikamp } 4750ac27a0ecSDave Kleikamp 4751ac27a0ecSDave Kleikamp /* 4752ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4753ac27a0ecSDave Kleikamp * and wait on the commit. 4754ac27a0ecSDave Kleikamp */ 4755617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4756ac27a0ecSDave Kleikamp { 4757ac27a0ecSDave Kleikamp journal_t *journal; 4758ac27a0ecSDave Kleikamp 4759ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4760ac27a0ecSDave Kleikamp return 0; 4761ac27a0ecSDave Kleikamp 4762617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4763b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4764ac27a0ecSDave Kleikamp } 4765ac27a0ecSDave Kleikamp 4766617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4767ac27a0ecSDave Kleikamp { 476814ce0cb4STheodore Ts'o int ret = 0; 47699eddacf9SJan Kara tid_t target; 477006a407f1SDmitry Monakhov bool needs_barrier = false; 47718d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4772ac27a0ecSDave Kleikamp 47739bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 47742e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4775a1177825SJan Kara /* 4776a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4777a1177825SJan Kara * no dirty dquots 4778a1177825SJan Kara */ 4779a1177825SJan Kara dquot_writeback_dquots(sb, -1); 478006a407f1SDmitry Monakhov /* 478106a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 478206a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 478306a407f1SDmitry Monakhov * transaction_commit will do it for us. 478406a407f1SDmitry Monakhov */ 4785bda32530STheodore Ts'o if (sbi->s_journal) { 478606a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 478706a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 478806a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 478906a407f1SDmitry Monakhov needs_barrier = true; 479006a407f1SDmitry Monakhov 47918d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4792ac27a0ecSDave Kleikamp if (wait) 4793bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4794bda32530STheodore Ts'o target); 47950390131bSFrank Mayhar } 4796bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4797bda32530STheodore Ts'o needs_barrier = true; 479806a407f1SDmitry Monakhov if (needs_barrier) { 479906a407f1SDmitry Monakhov int err; 480006a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 480106a407f1SDmitry Monakhov if (!ret) 480206a407f1SDmitry Monakhov ret = err; 480306a407f1SDmitry Monakhov } 480406a407f1SDmitry Monakhov 480506a407f1SDmitry Monakhov return ret; 480606a407f1SDmitry Monakhov } 480706a407f1SDmitry Monakhov 4808ac27a0ecSDave Kleikamp /* 4809ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4810ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4811be4f27d3SYongqiang Yang * 4812be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 48138e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 48148e8ad8a5SJan Kara * modifications. 4815ac27a0ecSDave Kleikamp */ 4816c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4817ac27a0ecSDave Kleikamp { 4818c4be0c1dSTakashi Sato int error = 0; 4819c4be0c1dSTakashi Sato journal_t *journal; 4820ac27a0ecSDave Kleikamp 48219ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 48229ca92389STheodore Ts'o return 0; 48239ca92389STheodore Ts'o 4824c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4825ac27a0ecSDave Kleikamp 4826bb044576STheodore Ts'o if (journal) { 4827ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4828dab291afSMingming Cao jbd2_journal_lock_updates(journal); 48297ffe1ea8SHidehiro Kawai 48307ffe1ea8SHidehiro Kawai /* 4831bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4832bb044576STheodore Ts'o * flush the journal. 48337ffe1ea8SHidehiro Kawai */ 4834c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 48356b0310fbSEric Sandeen if (error < 0) 48366b0310fbSEric Sandeen goto out; 4837bb044576STheodore Ts'o } 4838ac27a0ecSDave Kleikamp 4839ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4840617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4841e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 48426b0310fbSEric Sandeen out: 4843bb044576STheodore Ts'o if (journal) 48448e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4845bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 48466b0310fbSEric Sandeen return error; 4847ac27a0ecSDave Kleikamp } 4848ac27a0ecSDave Kleikamp 4849ac27a0ecSDave Kleikamp /* 4850ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4851ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4852ac27a0ecSDave Kleikamp */ 4853c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4854ac27a0ecSDave Kleikamp { 48559ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 48569ca92389STheodore Ts'o return 0; 48579ca92389STheodore Ts'o 48589ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4859617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4860e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4861c4be0c1dSTakashi Sato return 0; 4862ac27a0ecSDave Kleikamp } 4863ac27a0ecSDave Kleikamp 4864673c6100STheodore Ts'o /* 4865673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4866673c6100STheodore Ts'o */ 4867673c6100STheodore Ts'o struct ext4_mount_options { 4868673c6100STheodore Ts'o unsigned long s_mount_opt; 4869a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 487008cefc7aSEric W. Biederman kuid_t s_resuid; 487108cefc7aSEric W. Biederman kgid_t s_resgid; 4872673c6100STheodore Ts'o unsigned long s_commit_interval; 4873673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4874673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4875673c6100STheodore Ts'o int s_jquota_fmt; 4876a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4877673c6100STheodore Ts'o #endif 4878673c6100STheodore Ts'o }; 4879673c6100STheodore Ts'o 4880617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4881ac27a0ecSDave Kleikamp { 4882617ba13bSMingming Cao struct ext4_super_block *es; 4883617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4884ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4885617ba13bSMingming Cao struct ext4_mount_options old_opts; 4886c79d967dSChristoph Hellwig int enable_quota = 0; 48878a266467STheodore Ts'o ext4_group_t g; 4888b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4889c5e06d10SJohann Lombardi int err = 0; 4890ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 489103dafb5fSChen Gang int i, j; 4892ac27a0ecSDave Kleikamp #endif 4893d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4894ac27a0ecSDave Kleikamp 4895ac27a0ecSDave Kleikamp /* Store the original options */ 4896ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4897ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4898a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4899ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4900ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4901ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 490230773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 490330773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4904ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4905ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4906a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 490703dafb5fSChen Gang if (sbi->s_qf_names[i]) { 490803dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 490903dafb5fSChen Gang GFP_KERNEL); 491003dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 491103dafb5fSChen Gang for (j = 0; j < i; j++) 491203dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 49133e36a163SWei Yongjun kfree(orig_data); 491403dafb5fSChen Gang return -ENOMEM; 491503dafb5fSChen Gang } 491603dafb5fSChen Gang } else 491703dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4918ac27a0ecSDave Kleikamp #endif 4919b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4920b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4921ac27a0ecSDave Kleikamp 4922661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4923ac27a0ecSDave Kleikamp err = -EINVAL; 4924ac27a0ecSDave Kleikamp goto restore_opts; 4925ac27a0ecSDave Kleikamp } 4926ac27a0ecSDave Kleikamp 49276b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 49286b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 49296b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 49302d5b86e0SEric Sandeen "during remount not supported; ignoring"); 49312d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 4932c6d3d56dSDarrick J. Wong } 4933c6d3d56dSDarrick J. Wong 49346ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 49356ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 49366ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 49376ae6514bSPiotr Sarna "both data=journal and delalloc"); 49386ae6514bSPiotr Sarna err = -EINVAL; 49396ae6514bSPiotr Sarna goto restore_opts; 49406ae6514bSPiotr Sarna } 49416ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 49426ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 49436ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 49446ae6514bSPiotr Sarna err = -EINVAL; 49456ae6514bSPiotr Sarna goto restore_opts; 49466ae6514bSPiotr Sarna } 4947923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 4948923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4949923ae0ffSRoss Zwisler "both data=journal and dax"); 4950923ae0ffSRoss Zwisler err = -EINVAL; 4951923ae0ffSRoss Zwisler goto restore_opts; 4952923ae0ffSRoss Zwisler } 4953923ae0ffSRoss Zwisler } 4954923ae0ffSRoss Zwisler 4955923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 4956923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 4957923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 4958923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 49596ae6514bSPiotr Sarna } 49606ae6514bSPiotr Sarna 49614ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4962c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4963ac27a0ecSDave Kleikamp 4964ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4965482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4966ac27a0ecSDave Kleikamp 4967ac27a0ecSDave Kleikamp es = sbi->s_es; 4968ac27a0ecSDave Kleikamp 4969b3881f74STheodore Ts'o if (sbi->s_journal) { 4970617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4971b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4972b3881f74STheodore Ts'o } 4973ac27a0ecSDave Kleikamp 4974661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 49754ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4976ac27a0ecSDave Kleikamp err = -EROFS; 4977ac27a0ecSDave Kleikamp goto restore_opts; 4978ac27a0ecSDave Kleikamp } 4979ac27a0ecSDave Kleikamp 4980ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 498138c03b34STheodore Ts'o err = sync_filesystem(sb); 498238c03b34STheodore Ts'o if (err < 0) 498338c03b34STheodore Ts'o goto restore_opts; 49840f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 49850f0dd62fSChristoph Hellwig if (err < 0) 4986c79d967dSChristoph Hellwig goto restore_opts; 4987c79d967dSChristoph Hellwig 4988ac27a0ecSDave Kleikamp /* 4989ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4990ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4991ac27a0ecSDave Kleikamp */ 4992ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4993ac27a0ecSDave Kleikamp 4994ac27a0ecSDave Kleikamp /* 4995ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4996ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4997ac27a0ecSDave Kleikamp * mark the partition as valid again. 4998ac27a0ecSDave Kleikamp */ 4999617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 5000617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 5001ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 5002ac27a0ecSDave Kleikamp 5003a63c9eb2STheodore Ts'o if (sbi->s_journal) 5004617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 5005ac27a0ecSDave Kleikamp } else { 5006a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 50072cb5cc8bSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 50082cb5cc8bSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_READONLY) || 50092cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 5010ac27a0ecSDave Kleikamp err = -EROFS; 5011ac27a0ecSDave Kleikamp goto restore_opts; 5012ac27a0ecSDave Kleikamp } 5013ead6596bSEric Sandeen /* 50148a266467STheodore Ts'o * Make sure the group descriptor checksums 50150b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 50168a266467STheodore Ts'o */ 50178a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 50188a266467STheodore Ts'o struct ext4_group_desc *gdp = 50198a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 50208a266467STheodore Ts'o 5021feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 5022b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5023b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 50248a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 50258a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 50268a266467STheodore Ts'o err = -EINVAL; 50278a266467STheodore Ts'o goto restore_opts; 50288a266467STheodore Ts'o } 50298a266467STheodore Ts'o } 50308a266467STheodore Ts'o 50318a266467STheodore Ts'o /* 5032ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 5033ead6596bSEric Sandeen * around from a previously readonly bdev mount, 5034ead6596bSEric Sandeen * require a full umount/remount for now. 5035ead6596bSEric Sandeen */ 5036ead6596bSEric Sandeen if (es->s_last_orphan) { 5037b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 5038ead6596bSEric Sandeen "remount RDWR because of unprocessed " 5039ead6596bSEric Sandeen "orphan inode list. Please " 5040b31e1552SEric Sandeen "umount/remount instead"); 5041ead6596bSEric Sandeen err = -EINVAL; 5042ead6596bSEric Sandeen goto restore_opts; 5043ead6596bSEric Sandeen } 5044ead6596bSEric Sandeen 5045ac27a0ecSDave Kleikamp /* 5046ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 5047ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 5048ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 5049ac27a0ecSDave Kleikamp * the partition.) 5050ac27a0ecSDave Kleikamp */ 50510390131bSFrank Mayhar if (sbi->s_journal) 5052617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 5053ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5054617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 5055ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 5056c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 5057c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 5058c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5059c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5060c5e06d10SJohann Lombardi err = -EROFS; 5061c5e06d10SJohann Lombardi goto restore_opts; 5062c5e06d10SJohann Lombardi } 5063c79d967dSChristoph Hellwig enable_quota = 1; 5064ac27a0ecSDave Kleikamp } 5065ac27a0ecSDave Kleikamp } 5066bfff6873SLukas Czerner 5067bfff6873SLukas Czerner /* 5068bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5069bfff6873SLukas Czerner * current settings 5070bfff6873SLukas Czerner */ 5071bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 5072bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5073bfff6873SLukas Czerner else { 5074bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5075bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5076bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5077bfff6873SLukas Czerner } 5078bfff6873SLukas Czerner 50796fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5080d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 5081e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 50820390131bSFrank Mayhar 5083ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5084ac27a0ecSDave Kleikamp /* Release old quota file names */ 5085a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5086ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 50877c319d32SAditya Kali if (enable_quota) { 50887c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 50890f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 50907c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 50917c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 50927c319d32SAditya Kali err = ext4_enable_quotas(sb); 509307724f98STheodore Ts'o if (err) 50947c319d32SAditya Kali goto restore_opts; 50957c319d32SAditya Kali } 50967c319d32SAditya Kali } 50977c319d32SAditya Kali #endif 5098d4c402d9SCurt Wohlgemuth 5099a26f4992STheodore Ts'o *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); 5100d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5101d4c402d9SCurt Wohlgemuth kfree(orig_data); 5102ac27a0ecSDave Kleikamp return 0; 51030b8e58a1SAndreas Dilger 5104ac27a0ecSDave Kleikamp restore_opts: 5105ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5106ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5107a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5108ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5109ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5110ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 511130773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 511230773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5113ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5114ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5115a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5116ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5117ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5118ac27a0ecSDave Kleikamp } 5119ac27a0ecSDave Kleikamp #endif 5120d4c402d9SCurt Wohlgemuth kfree(orig_data); 5121ac27a0ecSDave Kleikamp return err; 5122ac27a0ecSDave Kleikamp } 5123ac27a0ecSDave Kleikamp 5124617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5125ac27a0ecSDave Kleikamp { 5126ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5127617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5128617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 512927dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5130960cc398SPekka Enberg u64 fsid; 5131d02a9391SKazuya Mio s64 bfree; 513227dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5133ac27a0ecSDave Kleikamp 5134952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5135952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5136ac27a0ecSDave Kleikamp 5137617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5138ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5139b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 514057042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 514157042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5142d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 514357042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 514427dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 514527dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 514627dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5147ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5148ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 514952d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5150617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5151960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5152960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5153960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5154960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 51550b8e58a1SAndreas Dilger 5156ac27a0ecSDave Kleikamp return 0; 5157ac27a0ecSDave Kleikamp } 5158ac27a0ecSDave Kleikamp 51590b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 51600b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5161ac27a0ecSDave Kleikamp * Process 1 Process 2 5162617ba13bSMingming Cao * ext4_create() quota_sync() 5163dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5164871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5165dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5166ac27a0ecSDave Kleikamp * 5167ac27a0ecSDave Kleikamp */ 5168ac27a0ecSDave Kleikamp 5169ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5170ac27a0ecSDave Kleikamp 5171ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5172ac27a0ecSDave Kleikamp { 51734c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5174ac27a0ecSDave Kleikamp } 5175ac27a0ecSDave Kleikamp 5176617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5177ac27a0ecSDave Kleikamp { 5178ac27a0ecSDave Kleikamp int ret, err; 5179ac27a0ecSDave Kleikamp handle_t *handle; 5180ac27a0ecSDave Kleikamp struct inode *inode; 5181ac27a0ecSDave Kleikamp 5182ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 51839924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5184617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5185ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5186ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5187ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5188617ba13bSMingming Cao err = ext4_journal_stop(handle); 5189ac27a0ecSDave Kleikamp if (!ret) 5190ac27a0ecSDave Kleikamp ret = err; 5191ac27a0ecSDave Kleikamp return ret; 5192ac27a0ecSDave Kleikamp } 5193ac27a0ecSDave Kleikamp 5194617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5195ac27a0ecSDave Kleikamp { 5196ac27a0ecSDave Kleikamp int ret, err; 5197ac27a0ecSDave Kleikamp handle_t *handle; 5198ac27a0ecSDave Kleikamp 51999924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5200617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5201ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5202ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5203ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5204617ba13bSMingming Cao err = ext4_journal_stop(handle); 5205ac27a0ecSDave Kleikamp if (!ret) 5206ac27a0ecSDave Kleikamp ret = err; 5207ac27a0ecSDave Kleikamp return ret; 5208ac27a0ecSDave Kleikamp } 5209ac27a0ecSDave Kleikamp 5210617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5211ac27a0ecSDave Kleikamp { 5212ac27a0ecSDave Kleikamp int ret, err; 5213ac27a0ecSDave Kleikamp handle_t *handle; 5214ac27a0ecSDave Kleikamp 52159924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5216617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 52179c3013e9SJan Kara if (IS_ERR(handle)) { 52189c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 52199c3013e9SJan Kara dquot_release(dquot); 5220ac27a0ecSDave Kleikamp return PTR_ERR(handle); 52219c3013e9SJan Kara } 5222ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5223617ba13bSMingming Cao err = ext4_journal_stop(handle); 5224ac27a0ecSDave Kleikamp if (!ret) 5225ac27a0ecSDave Kleikamp ret = err; 5226ac27a0ecSDave Kleikamp return ret; 5227ac27a0ecSDave Kleikamp } 5228ac27a0ecSDave Kleikamp 5229617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5230ac27a0ecSDave Kleikamp { 5231262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5232262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5233262b4662SJan Kara 52342c8be6b2SJan Kara /* Are we journaling quotas? */ 5235262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 5236262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5237ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5238617ba13bSMingming Cao return ext4_write_dquot(dquot); 5239ac27a0ecSDave Kleikamp } else { 5240ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5241ac27a0ecSDave Kleikamp } 5242ac27a0ecSDave Kleikamp } 5243ac27a0ecSDave Kleikamp 5244617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5245ac27a0ecSDave Kleikamp { 5246ac27a0ecSDave Kleikamp int ret, err; 5247ac27a0ecSDave Kleikamp handle_t *handle; 5248ac27a0ecSDave Kleikamp 5249ac27a0ecSDave Kleikamp /* Data block + inode block */ 52502b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5251ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5252ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5253ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5254617ba13bSMingming Cao err = ext4_journal_stop(handle); 5255ac27a0ecSDave Kleikamp if (!ret) 5256ac27a0ecSDave Kleikamp ret = err; 5257ac27a0ecSDave Kleikamp return ret; 5258ac27a0ecSDave Kleikamp } 5259ac27a0ecSDave Kleikamp 5260ac27a0ecSDave Kleikamp /* 5261ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5262ac27a0ecSDave Kleikamp * the quota file and such... 5263ac27a0ecSDave Kleikamp */ 5264617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5265ac27a0ecSDave Kleikamp { 5266287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5267617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5268ac27a0ecSDave Kleikamp } 5269ac27a0ecSDave Kleikamp 5270ac27a0ecSDave Kleikamp /* 5271ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5272ac27a0ecSDave Kleikamp */ 5273617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5274f00c9e44SJan Kara struct path *path) 5275ac27a0ecSDave Kleikamp { 5276ac27a0ecSDave Kleikamp int err; 5277ac27a0ecSDave Kleikamp 5278ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5279ac27a0ecSDave Kleikamp return -EINVAL; 52800623543bSJan Kara 5281ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5282d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5283ac27a0ecSDave Kleikamp return -EXDEV; 52840623543bSJan Kara /* Journaling quota? */ 52850623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 52862b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5287f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5288b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5289b31e1552SEric Sandeen "Quota file not on filesystem root. " 5290b31e1552SEric Sandeen "Journaled quota will not work"); 52910623543bSJan Kara } 52920623543bSJan Kara 52930623543bSJan Kara /* 52940623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 52950623543bSJan Kara * all updates to the file when we bypass pagecache... 52960623543bSJan Kara */ 52970390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 52982b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 52990623543bSJan Kara /* 53000623543bSJan Kara * We don't need to lock updates but journal_flush() could 53010623543bSJan Kara * otherwise be livelocked... 53020623543bSJan Kara */ 53030623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 53047ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 53050623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5306f00c9e44SJan Kara if (err) 53077ffe1ea8SHidehiro Kawai return err; 53087ffe1ea8SHidehiro Kawai } 53090623543bSJan Kara 5310f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5311ac27a0ecSDave Kleikamp } 5312ac27a0ecSDave Kleikamp 53137c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 53147c319d32SAditya Kali unsigned int flags) 53157c319d32SAditya Kali { 53167c319d32SAditya Kali int err; 53177c319d32SAditya Kali struct inode *qf_inode; 5318a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 53197c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 53207c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 53217c319d32SAditya Kali }; 53227c319d32SAditya Kali 53237c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 53247c319d32SAditya Kali 53257c319d32SAditya Kali if (!qf_inums[type]) 53267c319d32SAditya Kali return -EPERM; 53277c319d32SAditya Kali 53287c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 53297c319d32SAditya Kali if (IS_ERR(qf_inode)) { 53307c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 53317c319d32SAditya Kali return PTR_ERR(qf_inode); 53327c319d32SAditya Kali } 53337c319d32SAditya Kali 5334bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5335bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 53367c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 53377c319d32SAditya Kali iput(qf_inode); 53387c319d32SAditya Kali 53397c319d32SAditya Kali return err; 53407c319d32SAditya Kali } 53417c319d32SAditya Kali 53427c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 53437c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 53447c319d32SAditya Kali { 53457c319d32SAditya Kali int type, err = 0; 5346a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 53477c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 53487c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 53497c319d32SAditya Kali }; 53507c319d32SAditya Kali 53517c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5352a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 53537c319d32SAditya Kali if (qf_inums[type]) { 53547c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 53557c319d32SAditya Kali DQUOT_USAGE_ENABLED); 53567c319d32SAditya Kali if (err) { 53577c319d32SAditya Kali ext4_warning(sb, 535872ba7450STheodore Ts'o "Failed to enable quota tracking " 535972ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 536072ba7450STheodore Ts'o "e2fsck to fix.", type, err); 53617c319d32SAditya Kali return err; 53627c319d32SAditya Kali } 53637c319d32SAditya Kali } 53647c319d32SAditya Kali } 53657c319d32SAditya Kali return 0; 53667c319d32SAditya Kali } 53677c319d32SAditya Kali 5368ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5369ca0e05e4SDmitry Monakhov { 537021f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 537121f97697SJan Kara handle_t *handle; 537221f97697SJan Kara 537387009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 537487009d86SDmitry Monakhov * Caller already holds s_umount sem */ 537587009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5376ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5377ca0e05e4SDmitry Monakhov 53780b268590SAmir Goldstein if (!inode) 53790b268590SAmir Goldstein goto out; 53800b268590SAmir Goldstein 538121f97697SJan Kara /* Update modification times of quota files when userspace can 538221f97697SJan Kara * start looking at them */ 53839924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 538421f97697SJan Kara if (IS_ERR(handle)) 538521f97697SJan Kara goto out; 538621f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 538721f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 538821f97697SJan Kara ext4_journal_stop(handle); 538921f97697SJan Kara 539021f97697SJan Kara out: 5391ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5392ca0e05e4SDmitry Monakhov } 5393ca0e05e4SDmitry Monakhov 5394ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5395ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5396ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5397ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5398617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5399ac27a0ecSDave Kleikamp size_t len, loff_t off) 5400ac27a0ecSDave Kleikamp { 5401ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5402725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5403ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5404ac27a0ecSDave Kleikamp int tocopy; 5405ac27a0ecSDave Kleikamp size_t toread; 5406ac27a0ecSDave Kleikamp struct buffer_head *bh; 5407ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5408ac27a0ecSDave Kleikamp 5409ac27a0ecSDave Kleikamp if (off > i_size) 5410ac27a0ecSDave Kleikamp return 0; 5411ac27a0ecSDave Kleikamp if (off+len > i_size) 5412ac27a0ecSDave Kleikamp len = i_size-off; 5413ac27a0ecSDave Kleikamp toread = len; 5414ac27a0ecSDave Kleikamp while (toread > 0) { 5415ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5416ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 54171c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 54181c215028STheodore Ts'o if (IS_ERR(bh)) 54191c215028STheodore Ts'o return PTR_ERR(bh); 5420ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5421ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5422ac27a0ecSDave Kleikamp else 5423ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5424ac27a0ecSDave Kleikamp brelse(bh); 5425ac27a0ecSDave Kleikamp offset = 0; 5426ac27a0ecSDave Kleikamp toread -= tocopy; 5427ac27a0ecSDave Kleikamp data += tocopy; 5428ac27a0ecSDave Kleikamp blk++; 5429ac27a0ecSDave Kleikamp } 5430ac27a0ecSDave Kleikamp return len; 5431ac27a0ecSDave Kleikamp } 5432ac27a0ecSDave Kleikamp 5433ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5434ac27a0ecSDave Kleikamp * enough credits) */ 5435617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5436ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5437ac27a0ecSDave Kleikamp { 5438ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5439725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 54401c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5441*c5e298aeSTheodore Ts'o int retries = 0; 5442ac27a0ecSDave Kleikamp struct buffer_head *bh; 5443ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5444ac27a0ecSDave Kleikamp 54450390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5446b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5447b31e1552SEric Sandeen " cancelled because transaction is not started", 54489c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 54499c3013e9SJan Kara return -EIO; 54509c3013e9SJan Kara } 545167eeb568SDmitry Monakhov /* 545267eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 545367eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 545467eeb568SDmitry Monakhov */ 545567eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 545667eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 545767eeb568SDmitry Monakhov " cancelled because not block aligned", 545867eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 545967eeb568SDmitry Monakhov return -EIO; 546067eeb568SDmitry Monakhov } 546167eeb568SDmitry Monakhov 5462*c5e298aeSTheodore Ts'o do { 5463*c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5464*c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5465*c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5466*c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5467*c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 54681c215028STheodore Ts'o if (IS_ERR(bh)) 54691c215028STheodore Ts'o return PTR_ERR(bh); 5470ac27a0ecSDave Kleikamp if (!bh) 5471ac27a0ecSDave Kleikamp goto out; 54725d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5473617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5474ac27a0ecSDave Kleikamp if (err) { 5475ac27a0ecSDave Kleikamp brelse(bh); 54761c215028STheodore Ts'o return err; 5477ac27a0ecSDave Kleikamp } 5478ac27a0ecSDave Kleikamp lock_buffer(bh); 547967eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5480ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5481ac27a0ecSDave Kleikamp unlock_buffer(bh); 54820390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5483ac27a0ecSDave Kleikamp brelse(bh); 5484ac27a0ecSDave Kleikamp out: 548567eeb568SDmitry Monakhov if (inode->i_size < off + len) { 548667eeb568SDmitry Monakhov i_size_write(inode, off + len); 5487617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5488617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 548921f97697SJan Kara } 549067eeb568SDmitry Monakhov return len; 5491ac27a0ecSDave Kleikamp } 5492ac27a0ecSDave Kleikamp 5493ac27a0ecSDave Kleikamp #endif 5494ac27a0ecSDave Kleikamp 5495152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5496152a0836SAl Viro const char *dev_name, void *data) 5497ac27a0ecSDave Kleikamp { 5498152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5499ac27a0ecSDave Kleikamp } 5500ac27a0ecSDave Kleikamp 550137f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 550224b58424STheodore Ts'o static inline void register_as_ext2(void) 550324b58424STheodore Ts'o { 550424b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 550524b58424STheodore Ts'o if (err) 550624b58424STheodore Ts'o printk(KERN_WARNING 550724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 550824b58424STheodore Ts'o } 550924b58424STheodore Ts'o 551024b58424STheodore Ts'o static inline void unregister_as_ext2(void) 551124b58424STheodore Ts'o { 551224b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 551324b58424STheodore Ts'o } 55142035e776STheodore Ts'o 55152035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 55162035e776STheodore Ts'o { 55172035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 55182035e776STheodore Ts'o return 0; 55192035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 55202035e776STheodore Ts'o return 1; 55212035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 55222035e776STheodore Ts'o return 0; 55232035e776STheodore Ts'o return 1; 55242035e776STheodore Ts'o } 552524b58424STheodore Ts'o #else 552624b58424STheodore Ts'o static inline void register_as_ext2(void) { } 552724b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 55282035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 552924b58424STheodore Ts'o #endif 553024b58424STheodore Ts'o 553137f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 553224b58424STheodore Ts'o static inline void register_as_ext3(void) 553324b58424STheodore Ts'o { 553424b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 553524b58424STheodore Ts'o if (err) 553624b58424STheodore Ts'o printk(KERN_WARNING 553724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 553824b58424STheodore Ts'o } 553924b58424STheodore Ts'o 554024b58424STheodore Ts'o static inline void unregister_as_ext3(void) 554124b58424STheodore Ts'o { 554224b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 554324b58424STheodore Ts'o } 55442035e776STheodore Ts'o 55452035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 55462035e776STheodore Ts'o { 55472035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 55482035e776STheodore Ts'o return 0; 55492035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 55502035e776STheodore Ts'o return 0; 55512035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 55522035e776STheodore Ts'o return 1; 55532035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 55542035e776STheodore Ts'o return 0; 55552035e776STheodore Ts'o return 1; 55562035e776STheodore Ts'o } 555724b58424STheodore Ts'o #else 555824b58424STheodore Ts'o static inline void register_as_ext3(void) { } 555924b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 55602035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 556124b58424STheodore Ts'o #endif 556224b58424STheodore Ts'o 556303010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5564ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 556503010a33STheodore Ts'o .name = "ext4", 5566152a0836SAl Viro .mount = ext4_mount, 5567ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5568ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5569ac27a0ecSDave Kleikamp }; 55707f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5571ac27a0ecSDave Kleikamp 55728f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5573857ac889SLukas Czerner { 5574857ac889SLukas Czerner struct ext4_features *ef; 5575857ac889SLukas Czerner int ret = -ENOMEM; 5576857ac889SLukas Czerner 5577857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5578857ac889SLukas Czerner if (!ef) 5579857ac889SLukas Czerner goto out; 5580857ac889SLukas Czerner 5581857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5582857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5583857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5584857ac889SLukas Czerner "features"); 5585857ac889SLukas Czerner if (ret) { 5586857ac889SLukas Czerner kfree(ef); 5587857ac889SLukas Czerner goto out; 5588857ac889SLukas Czerner } 5589857ac889SLukas Czerner 5590857ac889SLukas Czerner ext4_feat = ef; 5591857ac889SLukas Czerner ret = 0; 5592857ac889SLukas Czerner out: 5593857ac889SLukas Czerner return ret; 5594857ac889SLukas Czerner } 5595857ac889SLukas Czerner 55968f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 55978f021222SLukas Czerner { 55988f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 55998f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 56008f021222SLukas Czerner kfree(ext4_feat); 56018f021222SLukas Czerner } 56028f021222SLukas Czerner 5603e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5604e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5605e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5606e9e3bcecSEric Sandeen 56075dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5608ac27a0ecSDave Kleikamp { 5609e9e3bcecSEric Sandeen int i, err; 5610c9de560dSAlex Tomas 561107c0c5d8SAl Viro ext4_li_info = NULL; 561207c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 561307c0c5d8SAl Viro 56149a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 561512e9b892SDmitry Monakhov ext4_check_flag_values(); 5616e9e3bcecSEric Sandeen 5617e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5618e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5619e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5620e9e3bcecSEric Sandeen } 5621e9e3bcecSEric Sandeen 562251865fdaSZheng Liu err = ext4_init_es(); 56236fd058f7STheodore Ts'o if (err) 56246fd058f7STheodore Ts'o return err; 562551865fdaSZheng Liu 562651865fdaSZheng Liu err = ext4_init_pageio(); 562751865fdaSZheng Liu if (err) 562851865fdaSZheng Liu goto out7; 562951865fdaSZheng Liu 56305dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5631bd2d0210STheodore Ts'o if (err) 5632d44651d0SFabrice Jouhaud goto out6; 56333197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 56340e376b1eSTheodore Ts'o if (!ext4_kset) { 56350e376b1eSTheodore Ts'o err = -ENOMEM; 5636dd68314cSTheodore Ts'o goto out5; 56370e376b1eSTheodore Ts'o } 5638d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5639857ac889SLukas Czerner 5640857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5641dd68314cSTheodore Ts'o if (err) 5642dd68314cSTheodore Ts'o goto out4; 5643857ac889SLukas Czerner 56445dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5645ac27a0ecSDave Kleikamp if (err) 5646c9de560dSAlex Tomas goto out2; 56479c191f70ST Makphaibulchoke else 56489c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5649ac27a0ecSDave Kleikamp err = init_inodecache(); 5650ac27a0ecSDave Kleikamp if (err) 5651ac27a0ecSDave Kleikamp goto out1; 565224b58424STheodore Ts'o register_as_ext3(); 56532035e776STheodore Ts'o register_as_ext2(); 565403010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5655ac27a0ecSDave Kleikamp if (err) 5656ac27a0ecSDave Kleikamp goto out; 5657bfff6873SLukas Czerner 5658ac27a0ecSDave Kleikamp return 0; 5659ac27a0ecSDave Kleikamp out: 566024b58424STheodore Ts'o unregister_as_ext2(); 566124b58424STheodore Ts'o unregister_as_ext3(); 5662ac27a0ecSDave Kleikamp destroy_inodecache(); 5663ac27a0ecSDave Kleikamp out1: 56649c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 56655dabfc78STheodore Ts'o ext4_exit_mballoc(); 56669c191f70ST Makphaibulchoke out2: 56678f021222SLukas Czerner ext4_exit_feat_adverts(); 56686fd058f7STheodore Ts'o out4: 5669d44651d0SFabrice Jouhaud if (ext4_proc_root) 5670dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5671dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5672d44651d0SFabrice Jouhaud out5: 5673dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5674d44651d0SFabrice Jouhaud out6: 56755dabfc78STheodore Ts'o ext4_exit_pageio(); 567651865fdaSZheng Liu out7: 567751865fdaSZheng Liu ext4_exit_es(); 567851865fdaSZheng Liu 5679ac27a0ecSDave Kleikamp return err; 5680ac27a0ecSDave Kleikamp } 5681ac27a0ecSDave Kleikamp 56825dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5683ac27a0ecSDave Kleikamp { 5684e298e73bSChao Yu ext4_exit_crypto(); 5685bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 568624b58424STheodore Ts'o unregister_as_ext2(); 568724b58424STheodore Ts'o unregister_as_ext3(); 568803010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5689ac27a0ecSDave Kleikamp destroy_inodecache(); 56905dabfc78STheodore Ts'o ext4_exit_mballoc(); 56918f021222SLukas Czerner ext4_exit_feat_adverts(); 56929f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 56933197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 56945dabfc78STheodore Ts'o ext4_exit_system_zone(); 56955dabfc78STheodore Ts'o ext4_exit_pageio(); 5696dd12ed14SEric Sandeen ext4_exit_es(); 5697ac27a0ecSDave Kleikamp } 5698ac27a0ecSDave Kleikamp 5699ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 570083982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5701ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 57025dabfc78STheodore Ts'o module_init(ext4_init_fs) 57035dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5704