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; 2971c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2981c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 2991c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3001c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3011c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3021c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3031c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3041c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3051c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3061c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3071c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3081c13d5c0STheodore Ts'o } 30966e61a9eSTheodore Ts'o /* 31066e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 31166e61a9eSTheodore Ts'o * started already 31266e61a9eSTheodore Ts'o */ 31366e61a9eSTheodore Ts'o if (!es->s_error_count) 31466e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 315ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3161c13d5c0STheodore Ts'o } 3171c13d5c0STheodore Ts'o 3181c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3191c13d5c0STheodore Ts'o unsigned int line) 3201c13d5c0STheodore Ts'o { 3211c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3221c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3231c13d5c0STheodore Ts'o } 3241c13d5c0STheodore Ts'o 32518aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 32618aadd47SBobi Jam { 32718aadd47SBobi Jam struct super_block *sb = journal->j_private; 32818aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 32918aadd47SBobi Jam int error = is_journal_aborted(journal); 3305d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 33118aadd47SBobi Jam 3325d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 33318aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3345d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3355d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3365d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 33718aadd47SBobi Jam list_del_init(&jce->jce_list); 33818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 33918aadd47SBobi Jam jce->jce_func(sb, jce, error); 34018aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 34118aadd47SBobi Jam } 34218aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 34318aadd47SBobi Jam } 3441c13d5c0STheodore Ts'o 345ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 346ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 347ac27a0ecSDave Kleikamp * 348ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 349617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 350ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 351ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 352ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 353ac27a0ecSDave Kleikamp * write out the superblock safely. 354ac27a0ecSDave Kleikamp * 355dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 356d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 357ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 358ac27a0ecSDave Kleikamp */ 359ac27a0ecSDave Kleikamp 360617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 361ac27a0ecSDave Kleikamp { 362ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 363ac27a0ecSDave Kleikamp return; 364ac27a0ecSDave Kleikamp 365ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 366617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 367ac27a0ecSDave Kleikamp 3684ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 369ac27a0ecSDave Kleikamp if (journal) 370dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 371ac27a0ecSDave Kleikamp } 372ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 373b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 3744418e141SDmitry Monakhov /* 3754418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 3764418e141SDmitry Monakhov * before ->s_flags update 3774418e141SDmitry Monakhov */ 3784418e141SDmitry Monakhov smp_wmb(); 379ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 380ac27a0ecSDave Kleikamp } 381ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 382617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 383ac27a0ecSDave Kleikamp sb->s_id); 384ac27a0ecSDave Kleikamp } 385ac27a0ecSDave Kleikamp 386efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 387efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 388efbed4dcSTheodore Ts'o "EXT4-fs error") 389efbed4dcSTheodore Ts'o 39012062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 391c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 392ac27a0ecSDave Kleikamp { 3930ff2ea7dSJoe Perches struct va_format vaf; 394ac27a0ecSDave Kleikamp va_list args; 395ac27a0ecSDave Kleikamp 396efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 397ac27a0ecSDave Kleikamp va_start(args, fmt); 3980ff2ea7dSJoe Perches vaf.fmt = fmt; 3990ff2ea7dSJoe Perches vaf.va = &args; 400efbed4dcSTheodore Ts'o printk(KERN_CRIT 401efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4020ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 403ac27a0ecSDave Kleikamp va_end(args); 404efbed4dcSTheodore Ts'o } 405f3fc0210STheodore Ts'o save_error_info(sb, function, line); 406617ba13bSMingming Cao ext4_handle_error(sb); 407ac27a0ecSDave Kleikamp } 408ac27a0ecSDave Kleikamp 409e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 410c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 411273df556SFrank Mayhar const char *fmt, ...) 412273df556SFrank Mayhar { 413273df556SFrank Mayhar va_list args; 414f7c21177STheodore Ts'o struct va_format vaf; 4151c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 416273df556SFrank Mayhar 4171c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4181c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 419efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 420273df556SFrank Mayhar va_start(args, fmt); 421f7c21177STheodore Ts'o vaf.fmt = fmt; 422f7c21177STheodore Ts'o vaf.va = &args; 423c398eda0STheodore Ts'o if (block) 424d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 425d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 426d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 427d9ee81daSJoe Perches block, current->comm, &vaf); 428d9ee81daSJoe Perches else 429d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 430d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 431d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 432d9ee81daSJoe Perches current->comm, &vaf); 433273df556SFrank Mayhar va_end(args); 434efbed4dcSTheodore Ts'o } 435efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 436273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 437273df556SFrank Mayhar } 438273df556SFrank Mayhar 439e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 440f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 441f7c21177STheodore Ts'o const char *fmt, ...) 442273df556SFrank Mayhar { 443273df556SFrank Mayhar va_list args; 444f7c21177STheodore Ts'o struct va_format vaf; 4451c13d5c0STheodore Ts'o struct ext4_super_block *es; 446496ad9aaSAl Viro struct inode *inode = file_inode(file); 447273df556SFrank Mayhar char pathname[80], *path; 448273df556SFrank Mayhar 4491c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4501c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 451efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 452273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 453f9a62d09SDan Carpenter if (IS_ERR(path)) 454273df556SFrank Mayhar path = "(unknown)"; 455f7c21177STheodore Ts'o va_start(args, fmt); 456f7c21177STheodore Ts'o vaf.fmt = fmt; 457f7c21177STheodore Ts'o vaf.va = &args; 458d9ee81daSJoe Perches if (block) 459d9ee81daSJoe Perches printk(KERN_CRIT 460d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 461d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 462d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 463d9ee81daSJoe Perches block, current->comm, path, &vaf); 464d9ee81daSJoe Perches else 465d9ee81daSJoe Perches printk(KERN_CRIT 466d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 467d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 468d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 469d9ee81daSJoe Perches current->comm, path, &vaf); 470273df556SFrank Mayhar va_end(args); 471efbed4dcSTheodore Ts'o } 472efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 473273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 474273df556SFrank Mayhar } 475273df556SFrank Mayhar 476722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 477ac27a0ecSDave Kleikamp char nbuf[16]) 478ac27a0ecSDave Kleikamp { 479ac27a0ecSDave Kleikamp char *errstr = NULL; 480ac27a0ecSDave Kleikamp 481ac27a0ecSDave Kleikamp switch (errno) { 482ac27a0ecSDave Kleikamp case -EIO: 483ac27a0ecSDave Kleikamp errstr = "IO failure"; 484ac27a0ecSDave Kleikamp break; 485ac27a0ecSDave Kleikamp case -ENOMEM: 486ac27a0ecSDave Kleikamp errstr = "Out of memory"; 487ac27a0ecSDave Kleikamp break; 488ac27a0ecSDave Kleikamp case -EROFS: 48978f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 49078f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 491ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 492ac27a0ecSDave Kleikamp else 493ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 494ac27a0ecSDave Kleikamp break; 495ac27a0ecSDave Kleikamp default: 496ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 497ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 498ac27a0ecSDave Kleikamp * NULL. */ 499ac27a0ecSDave Kleikamp if (nbuf) { 500ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 501ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 502ac27a0ecSDave Kleikamp errstr = nbuf; 503ac27a0ecSDave Kleikamp } 504ac27a0ecSDave Kleikamp break; 505ac27a0ecSDave Kleikamp } 506ac27a0ecSDave Kleikamp 507ac27a0ecSDave Kleikamp return errstr; 508ac27a0ecSDave Kleikamp } 509ac27a0ecSDave Kleikamp 510617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 511ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 512ac27a0ecSDave Kleikamp 513c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 514c398eda0STheodore Ts'o unsigned int line, int errno) 515ac27a0ecSDave Kleikamp { 516ac27a0ecSDave Kleikamp char nbuf[16]; 517ac27a0ecSDave Kleikamp const char *errstr; 518ac27a0ecSDave Kleikamp 519ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 520ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 521ac27a0ecSDave Kleikamp * an error. */ 522ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 523ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 524ac27a0ecSDave Kleikamp return; 525ac27a0ecSDave Kleikamp 526efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 527617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 528c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 529c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 530efbed4dcSTheodore Ts'o } 531ac27a0ecSDave Kleikamp 532efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 533617ba13bSMingming Cao ext4_handle_error(sb); 534ac27a0ecSDave Kleikamp } 535ac27a0ecSDave Kleikamp 536ac27a0ecSDave Kleikamp /* 537617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 538ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 539ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 540ac27a0ecSDave Kleikamp * 541ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 542ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 543ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 544ac27a0ecSDave Kleikamp */ 545ac27a0ecSDave Kleikamp 546c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 547c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 548ac27a0ecSDave Kleikamp { 549ac27a0ecSDave Kleikamp va_list args; 550ac27a0ecSDave Kleikamp 5511c13d5c0STheodore Ts'o save_error_info(sb, function, line); 552ac27a0ecSDave Kleikamp va_start(args, fmt); 553c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 554c398eda0STheodore Ts'o function, line); 555ac27a0ecSDave Kleikamp vprintk(fmt, args); 556ac27a0ecSDave Kleikamp printk("\n"); 557ac27a0ecSDave Kleikamp va_end(args); 558ac27a0ecSDave Kleikamp 5591c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 560b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 5614ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 5624418e141SDmitry Monakhov /* 5634418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 5644418e141SDmitry Monakhov * before ->s_flags update 5654418e141SDmitry Monakhov */ 5664418e141SDmitry Monakhov smp_wmb(); 5674418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 568ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 569dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5701c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5711c13d5c0STheodore Ts'o } 5721c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5731c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 574ac27a0ecSDave Kleikamp } 575ac27a0ecSDave Kleikamp 576e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 577e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 578b31e1552SEric Sandeen { 5790ff2ea7dSJoe Perches struct va_format vaf; 580b31e1552SEric Sandeen va_list args; 581b31e1552SEric Sandeen 582efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 583efbed4dcSTheodore Ts'o return; 584efbed4dcSTheodore Ts'o 585b31e1552SEric Sandeen va_start(args, fmt); 5860ff2ea7dSJoe Perches vaf.fmt = fmt; 5870ff2ea7dSJoe Perches vaf.va = &args; 5880ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 589b31e1552SEric Sandeen va_end(args); 590b31e1552SEric Sandeen } 591b31e1552SEric Sandeen 59212062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 593c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 594ac27a0ecSDave Kleikamp { 5950ff2ea7dSJoe Perches struct va_format vaf; 596ac27a0ecSDave Kleikamp va_list args; 597ac27a0ecSDave Kleikamp 598efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 599efbed4dcSTheodore Ts'o "EXT4-fs warning")) 600efbed4dcSTheodore Ts'o return; 601efbed4dcSTheodore Ts'o 602ac27a0ecSDave Kleikamp va_start(args, fmt); 6030ff2ea7dSJoe Perches vaf.fmt = fmt; 6040ff2ea7dSJoe Perches vaf.va = &args; 6050ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6060ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 607ac27a0ecSDave Kleikamp va_end(args); 608ac27a0ecSDave Kleikamp } 609ac27a0ecSDave Kleikamp 610e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 611e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 612e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 613e29136f8STheodore Ts'o const char *fmt, ...) 6145d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6155d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6165d1b1b3fSAneesh Kumar K.V { 6170ff2ea7dSJoe Perches struct va_format vaf; 6185d1b1b3fSAneesh Kumar K.V va_list args; 6195d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6205d1b1b3fSAneesh Kumar K.V 6211c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6221c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6231c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6240ff2ea7dSJoe Perches 625efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 6265d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6270ff2ea7dSJoe Perches vaf.fmt = fmt; 6280ff2ea7dSJoe Perches vaf.va = &args; 62921149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 630e29136f8STheodore Ts'o sb->s_id, function, line, grp); 631e29136f8STheodore Ts'o if (ino) 6320ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 633e29136f8STheodore Ts'o if (block) 634efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 635efbed4dcSTheodore Ts'o (unsigned long long) block); 6360ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6375d1b1b3fSAneesh Kumar K.V va_end(args); 638efbed4dcSTheodore Ts'o } 6395d1b1b3fSAneesh Kumar K.V 6405d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 641e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6425d1b1b3fSAneesh Kumar K.V return; 6435d1b1b3fSAneesh Kumar K.V } 6441c13d5c0STheodore Ts'o 6455d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6465d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6475d1b1b3fSAneesh Kumar K.V /* 6485d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6495d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6505d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6515d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6525d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 65325985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 6545d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6555d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6565d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6575d1b1b3fSAneesh Kumar K.V */ 6585d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6595d1b1b3fSAneesh Kumar K.V return; 6605d1b1b3fSAneesh Kumar K.V } 6615d1b1b3fSAneesh Kumar K.V 662617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 663ac27a0ecSDave Kleikamp { 664617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 665ac27a0ecSDave Kleikamp 666617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 667ac27a0ecSDave Kleikamp return; 668ac27a0ecSDave Kleikamp 66912062dddSEric Sandeen ext4_warning(sb, 670ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 671ac27a0ecSDave Kleikamp "running e2fsck is recommended", 672617ba13bSMingming Cao EXT4_DYNAMIC_REV); 673ac27a0ecSDave Kleikamp 674617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 675617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 676617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 677ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 678ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 679ac27a0ecSDave Kleikamp 680ac27a0ecSDave Kleikamp /* 681ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 682ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 683ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 684ac27a0ecSDave Kleikamp */ 685ac27a0ecSDave Kleikamp } 686ac27a0ecSDave Kleikamp 687ac27a0ecSDave Kleikamp /* 688ac27a0ecSDave Kleikamp * Open the external journal device 689ac27a0ecSDave Kleikamp */ 690b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 691ac27a0ecSDave Kleikamp { 692ac27a0ecSDave Kleikamp struct block_device *bdev; 693ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 694ac27a0ecSDave Kleikamp 695d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 696ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 697ac27a0ecSDave Kleikamp goto fail; 698ac27a0ecSDave Kleikamp return bdev; 699ac27a0ecSDave Kleikamp 700ac27a0ecSDave Kleikamp fail: 701b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 702ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 703ac27a0ecSDave Kleikamp return NULL; 704ac27a0ecSDave Kleikamp } 705ac27a0ecSDave Kleikamp 706ac27a0ecSDave Kleikamp /* 707ac27a0ecSDave Kleikamp * Release the journal device 708ac27a0ecSDave Kleikamp */ 7094385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 710ac27a0ecSDave Kleikamp { 7114385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 712ac27a0ecSDave Kleikamp } 713ac27a0ecSDave Kleikamp 7144385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 715ac27a0ecSDave Kleikamp { 716ac27a0ecSDave Kleikamp struct block_device *bdev; 717ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 718ac27a0ecSDave Kleikamp if (bdev) { 7194385bab1SAl Viro ext4_blkdev_put(bdev); 720ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 721ac27a0ecSDave Kleikamp } 722ac27a0ecSDave Kleikamp } 723ac27a0ecSDave Kleikamp 724ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 725ac27a0ecSDave Kleikamp { 726617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 727ac27a0ecSDave Kleikamp } 728ac27a0ecSDave Kleikamp 729617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 730ac27a0ecSDave Kleikamp { 731ac27a0ecSDave Kleikamp struct list_head *l; 732ac27a0ecSDave Kleikamp 733b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 734ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 735ac27a0ecSDave Kleikamp 736ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 737ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 738ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 739ac27a0ecSDave Kleikamp printk(KERN_ERR " " 740ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 741ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 742ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 743ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 744ac27a0ecSDave Kleikamp } 745ac27a0ecSDave Kleikamp } 746ac27a0ecSDave Kleikamp 747617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 748ac27a0ecSDave Kleikamp { 749617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 750617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 751ef2cabf7SHidehiro Kawai int i, err; 752ac27a0ecSDave Kleikamp 753857ac889SLukas Czerner ext4_unregister_li_request(sb); 754e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 755e0ccfd95SChristoph Hellwig 7562e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 7572e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 7584c0425ffSMingming Cao 7590390131bSFrank Mayhar if (sbi->s_journal) { 760ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 76147b4a50bSJan Kara sbi->s_journal = NULL; 762ef2cabf7SHidehiro Kawai if (err < 0) 763c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7640390131bSFrank Mayhar } 765d4edac31SJosef Bacik 766d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 7679105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 768d4edac31SJosef Bacik ext4_release_system_zone(sb); 769d4edac31SJosef Bacik ext4_mb_release(sb); 770d4edac31SJosef Bacik ext4_ext_release(sb); 771d4edac31SJosef Bacik ext4_xattr_put_super(sb); 772d4edac31SJosef Bacik 773ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 774617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 775ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 776ac27a0ecSDave Kleikamp } 77758c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 778a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 779a8e25a83SArtem Bityutskiy 780240799cdSTheodore Ts'o if (sbi->s_proc) { 78166acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 7829f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 783240799cdSTheodore Ts'o } 7843197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 785ac27a0ecSDave Kleikamp 786ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 787ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 788b93b41d4SAl Viro kvfree(sbi->s_group_desc); 789b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 79057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 791ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 792ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 79357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 794ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 795ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 796a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 797ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 798ac27a0ecSDave Kleikamp #endif 799ac27a0ecSDave Kleikamp 800ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 801ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 802ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 803ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 804ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 805ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 806ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 807ac27a0ecSDave Kleikamp 808f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 809ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 810ac27a0ecSDave Kleikamp /* 811ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 812ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 813ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 814ac27a0ecSDave Kleikamp */ 815ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 816f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 817617ba13bSMingming Cao ext4_blkdev_remove(sbi); 818ac27a0ecSDave Kleikamp } 8199c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 8209c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 8219c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 8229c191f70ST Makphaibulchoke } 823c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 824c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 825ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8263197ebdbSTheodore Ts'o /* 8273197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8283197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8293197ebdbSTheodore Ts'o */ 8303197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8313197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 8320441984aSDarrick J. Wong if (sbi->s_chksum_driver) 8330441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 834705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 835ac27a0ecSDave Kleikamp kfree(sbi); 836ac27a0ecSDave Kleikamp } 837ac27a0ecSDave Kleikamp 838e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 839ac27a0ecSDave Kleikamp 840ac27a0ecSDave Kleikamp /* 841ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 842ac27a0ecSDave Kleikamp */ 843617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 844ac27a0ecSDave Kleikamp { 845617ba13bSMingming Cao struct ext4_inode_info *ei; 846ac27a0ecSDave Kleikamp 847e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 848ac27a0ecSDave Kleikamp if (!ei) 849ac27a0ecSDave Kleikamp return NULL; 8500b8e58a1SAndreas Dilger 851ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 852202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 853c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 854c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8559a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 8569a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 857edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 858eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 859edaa53caSZheng Liu ei->i_es_shk_nr = 0; 860dd475925SJan Kara ei->i_es_shrink_lblk = 0; 861d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 862d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 863d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8649d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 8657e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 866d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 867a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 868a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 86996c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 870a9e7f447SDmitry Monakhov #endif 8718aefcd55STheodore Ts'o ei->jinode = NULL; 8722e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 873744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 874b436b9beSJan Kara ei->i_sync_tid = 0; 875b436b9beSJan Kara ei->i_datasync_tid = 0; 876f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 877e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 8782e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 879*b30ab0e0SMichael Halcrow #ifdef CONFIG_EXT4_FS_ENCRYPTION 880*b30ab0e0SMichael Halcrow ei->i_encryption_key.mode = EXT4_ENCRYPTION_MODE_INVALID; 881*b30ab0e0SMichael Halcrow #endif 8820b8e58a1SAndreas Dilger 883ac27a0ecSDave Kleikamp return &ei->vfs_inode; 884ac27a0ecSDave Kleikamp } 885ac27a0ecSDave Kleikamp 8867ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 8877ff9c073STheodore Ts'o { 8887ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 8897ff9c073STheodore Ts'o 8907ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 8917ff9c073STheodore Ts'o return drop; 8927ff9c073STheodore Ts'o } 8937ff9c073STheodore Ts'o 894fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 895fa0d7e3dSNick Piggin { 896fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 897fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 898fa0d7e3dSNick Piggin } 899fa0d7e3dSNick Piggin 900617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 901ac27a0ecSDave Kleikamp { 9029f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 903b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 904b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 905b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9069f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9079f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9089f7dd93dSVasily Averin true); 9099f7dd93dSVasily Averin dump_stack(); 9109f7dd93dSVasily Averin } 911fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 912ac27a0ecSDave Kleikamp } 913ac27a0ecSDave Kleikamp 91451cc5068SAlexey Dobriyan static void init_once(void *foo) 915ac27a0ecSDave Kleikamp { 916617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 917ac27a0ecSDave Kleikamp 918ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 919ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9200e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 921ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 922ac27a0ecSDave Kleikamp } 923ac27a0ecSDave Kleikamp 924e67bc2b3SFabian Frederick static int __init init_inodecache(void) 925ac27a0ecSDave Kleikamp { 926617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 927617ba13bSMingming Cao sizeof(struct ext4_inode_info), 928ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 929ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 93020c2df83SPaul Mundt init_once); 931617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 932ac27a0ecSDave Kleikamp return -ENOMEM; 933ac27a0ecSDave Kleikamp return 0; 934ac27a0ecSDave Kleikamp } 935ac27a0ecSDave Kleikamp 936ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 937ac27a0ecSDave Kleikamp { 9388c0a8537SKirill A. Shutemov /* 9398c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 9408c0a8537SKirill A. Shutemov * destroy cache. 9418c0a8537SKirill A. Shutemov */ 9428c0a8537SKirill A. Shutemov rcu_barrier(); 943617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 944ac27a0ecSDave Kleikamp } 945ac27a0ecSDave Kleikamp 9460930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 947ac27a0ecSDave Kleikamp { 9480930fcc1SAl Viro invalidate_inode_buffers(inode); 949dbd5768fSJan Kara clear_inode(inode); 9509f754758SChristoph Hellwig dquot_drop(inode); 951c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 95251865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 9538aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9548aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9558aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9568aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9578aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9588aefcd55STheodore Ts'o } 959ac27a0ecSDave Kleikamp } 960ac27a0ecSDave Kleikamp 9611b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9621b961ac0SChristoph Hellwig u64 ino, u32 generation) 963ac27a0ecSDave Kleikamp { 964ac27a0ecSDave Kleikamp struct inode *inode; 965ac27a0ecSDave Kleikamp 966617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 967ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 968617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 969ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 970ac27a0ecSDave Kleikamp 971ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 972ac27a0ecSDave Kleikamp * 973617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 974ac27a0ecSDave Kleikamp * deleted, so we should be safe. 975ac27a0ecSDave Kleikamp * 976ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 977ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 978ac27a0ecSDave Kleikamp */ 979f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 9801d1fe1eeSDavid Howells if (IS_ERR(inode)) 9811d1fe1eeSDavid Howells return ERR_CAST(inode); 9821d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 983ac27a0ecSDave Kleikamp iput(inode); 984ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 985ac27a0ecSDave Kleikamp } 9861b961ac0SChristoph Hellwig 9871b961ac0SChristoph Hellwig return inode; 988ac27a0ecSDave Kleikamp } 9891b961ac0SChristoph Hellwig 9901b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 9911b961ac0SChristoph Hellwig int fh_len, int fh_type) 9921b961ac0SChristoph Hellwig { 9931b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 9941b961ac0SChristoph Hellwig ext4_nfs_get_inode); 9951b961ac0SChristoph Hellwig } 9961b961ac0SChristoph Hellwig 9971b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 9981b961ac0SChristoph Hellwig int fh_len, int fh_type) 9991b961ac0SChristoph Hellwig { 10001b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10011b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1002ac27a0ecSDave Kleikamp } 1003ac27a0ecSDave Kleikamp 1004c39a7f84SToshiyuki Okajima /* 1005c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1006c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1007c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1008c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1009c39a7f84SToshiyuki Okajima */ 10100b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10110b8e58a1SAndreas Dilger gfp_t wait) 1012c39a7f84SToshiyuki Okajima { 1013c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1014c39a7f84SToshiyuki Okajima 1015c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1016c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1017c39a7f84SToshiyuki Okajima return 0; 1018c39a7f84SToshiyuki Okajima if (journal) 1019c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1020c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1021c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1022c39a7f84SToshiyuki Okajima } 1023c39a7f84SToshiyuki Okajima 1024ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1025ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1026ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1027ac27a0ecSDave Kleikamp 1028617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1029617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1030617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1031617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1032617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10336f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1034f00c9e44SJan Kara struct path *path); 1035ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1036617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1037617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1038ac27a0ecSDave Kleikamp size_t len, loff_t off); 1039617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1040ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 10417c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 10427c319d32SAditya Kali unsigned int flags); 10437c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1044ac27a0ecSDave Kleikamp 104596c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 104696c7e0d9SJan Kara { 104796c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 104896c7e0d9SJan Kara } 104996c7e0d9SJan Kara 105061e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 105160e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1052617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1053617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1054617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1055617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1056a5b5ee32SJan Kara .write_info = ext4_write_info, 1057a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1058a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1059ac27a0ecSDave Kleikamp }; 1060ac27a0ecSDave Kleikamp 10610d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1062617ba13bSMingming Cao .quota_on = ext4_quota_on, 1063ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1064287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1065287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1066287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1067287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1068287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1069ac27a0ecSDave Kleikamp }; 1070ac27a0ecSDave Kleikamp #endif 1071ac27a0ecSDave Kleikamp 1072ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1073617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1074617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1075617ba13bSMingming Cao .write_inode = ext4_write_inode, 1076617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 10777ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 10780930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1079617ba13bSMingming Cao .put_super = ext4_put_super, 1080617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1081c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1082c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1083617ba13bSMingming Cao .statfs = ext4_statfs, 1084617ba13bSMingming Cao .remount_fs = ext4_remount, 1085617ba13bSMingming Cao .show_options = ext4_show_options, 1086ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1087617ba13bSMingming Cao .quota_read = ext4_quota_read, 1088617ba13bSMingming Cao .quota_write = ext4_quota_write, 108996c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1090ac27a0ecSDave Kleikamp #endif 1091c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1092ac27a0ecSDave Kleikamp }; 1093ac27a0ecSDave Kleikamp 109439655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 10951b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 10961b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1097617ba13bSMingming Cao .get_parent = ext4_get_parent, 1098ac27a0ecSDave Kleikamp }; 1099ac27a0ecSDave Kleikamp 1100ac27a0ecSDave Kleikamp enum { 1101ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1102ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 110372578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1104ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 110572578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1106ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1107ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1108ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1109296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1110ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11115a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1112ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1113923ae0ffSRoss Zwisler Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_dax, 11141449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 1115a26f4992STheodore Ts'o Opt_lazytime, Opt_nolazytime, 11161449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11175328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1118744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1119fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1120c6d3d56dSDarrick J. Wong Opt_max_dir_size_kb, Opt_nojournal_checksum, 1121ac27a0ecSDave Kleikamp }; 1122ac27a0ecSDave Kleikamp 1123a447c093SSteven Whitehouse static const match_table_t tokens = { 1124ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1125ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1126ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1127ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1128ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1129ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1130ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1131ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1132ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1133ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1134ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1135ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1136ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1137ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 113872578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 113972578c33STheodore Ts'o {Opt_removed, "orlov"}, 1140ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1141ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1142ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1143ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1144e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11455a916be1STheodore Ts'o {Opt_noload, "noload"}, 114672578c33STheodore Ts'o {Opt_removed, "nobh"}, 114772578c33STheodore Ts'o {Opt_removed, "bh"}, 1148ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 114930773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 115030773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1151ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1152ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1153818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1154c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1155818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1156ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1157ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1158ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1159ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11605bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11615bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1162ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1163ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1164ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1165ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1166ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1167ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 11685a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1169ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1170ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1171ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1172ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1173ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 117406705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 117506705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 117625ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1177923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1178c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 117964769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1180a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1181a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1182dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 118336ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 118436ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 11856fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 11866fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1187240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1188b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1189afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 119006705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 119106705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1192744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1193744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 11945328e635SEric Sandeen {Opt_discard, "discard"}, 11955328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1196fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1197fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1198fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1199df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1200c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1201c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1202c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1203c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1204c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1205f3f12faaSJosef Bacik {Opt_err, NULL}, 1206ac27a0ecSDave Kleikamp }; 1207ac27a0ecSDave Kleikamp 1208617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1209ac27a0ecSDave Kleikamp { 1210617ba13bSMingming Cao ext4_fsblk_t sb_block; 1211ac27a0ecSDave Kleikamp char *options = (char *) *data; 1212ac27a0ecSDave Kleikamp 1213ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1214ac27a0ecSDave Kleikamp return 1; /* Default location */ 12150b8e58a1SAndreas Dilger 1216ac27a0ecSDave Kleikamp options += 3; 12170b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1218ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1219ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12204776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1221ac27a0ecSDave Kleikamp (char *) *data); 1222ac27a0ecSDave Kleikamp return 1; 1223ac27a0ecSDave Kleikamp } 1224ac27a0ecSDave Kleikamp if (*options == ',') 1225ac27a0ecSDave Kleikamp options++; 1226ac27a0ecSDave Kleikamp *data = (void *) options; 12270b8e58a1SAndreas Dilger 1228ac27a0ecSDave Kleikamp return sb_block; 1229ac27a0ecSDave Kleikamp } 1230ac27a0ecSDave Kleikamp 1231b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1232437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1233437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1234b3881f74STheodore Ts'o 123556c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 123656c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 123756c50f11SDmitry Monakhov { 123856c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 123956c50f11SDmitry Monakhov char *qname; 124003dafb5fSChen Gang int ret = -1; 124156c50f11SDmitry Monakhov 124256c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 124356c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 124456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 124556c50f11SDmitry Monakhov "Cannot change journaled " 124656c50f11SDmitry Monakhov "quota options when quota turned on"); 124757f73c2cSTheodore Ts'o return -1; 124856c50f11SDmitry Monakhov } 1249262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1250262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1251262b4662SJan Kara "when QUOTA feature is enabled"); 1252262b4662SJan Kara return -1; 1253262b4662SJan Kara } 125456c50f11SDmitry Monakhov qname = match_strdup(args); 125556c50f11SDmitry Monakhov if (!qname) { 125656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 125756c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 125857f73c2cSTheodore Ts'o return -1; 125956c50f11SDmitry Monakhov } 126003dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 126103dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 126203dafb5fSChen Gang ret = 1; 126303dafb5fSChen Gang else 126456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 126503dafb5fSChen Gang "%s quota file already specified", 126603dafb5fSChen Gang QTYPE2NAME(qtype)); 126703dafb5fSChen Gang goto errout; 126856c50f11SDmitry Monakhov } 126903dafb5fSChen Gang if (strchr(qname, '/')) { 127056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127156c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 127203dafb5fSChen Gang goto errout; 127356c50f11SDmitry Monakhov } 127403dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1275fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 127656c50f11SDmitry Monakhov return 1; 127703dafb5fSChen Gang errout: 127803dafb5fSChen Gang kfree(qname); 127903dafb5fSChen Gang return ret; 128056c50f11SDmitry Monakhov } 128156c50f11SDmitry Monakhov 128256c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 128356c50f11SDmitry Monakhov { 128456c50f11SDmitry Monakhov 128556c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 128656c50f11SDmitry Monakhov 128756c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 128856c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 128956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 129056c50f11SDmitry Monakhov " when quota turned on"); 129157f73c2cSTheodore Ts'o return -1; 129256c50f11SDmitry Monakhov } 129303dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 129456c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 129556c50f11SDmitry Monakhov return 1; 129656c50f11SDmitry Monakhov } 129756c50f11SDmitry Monakhov #endif 129856c50f11SDmitry Monakhov 129926092bf5STheodore Ts'o #define MOPT_SET 0x0001 130026092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 130126092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 130226092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 130326092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 130426092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 130526092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 130626092bf5STheodore Ts'o #define MOPT_Q 0 130726092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 130826092bf5STheodore Ts'o #else 130926092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 131026092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 131126092bf5STheodore Ts'o #endif 131226092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13138dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13148dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13158dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1316ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 131726092bf5STheodore Ts'o 131826092bf5STheodore Ts'o static const struct mount_opts { 131926092bf5STheodore Ts'o int token; 132026092bf5STheodore Ts'o int mount_opt; 132126092bf5STheodore Ts'o int flags; 132226092bf5STheodore Ts'o } ext4_mount_opts[] = { 132326092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 132426092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 132526092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 132626092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 132726092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 132826092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13298dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13308dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13318dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13328dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 133326092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 133426092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13358dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13368dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13378dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 133859d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1339c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1340c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 13418dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 13428dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 134326092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13448dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 13458dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13468dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 134726092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 134826092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 134926092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13508dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13518dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13528dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13538dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 135426092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 135526092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 135626092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 135726092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 135826092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 135926092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 136026092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 136126092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 136226092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 136326092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1364923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 136526092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 13660efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 13670efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 13680efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 1369ad4eec61SEric Sandeen {Opt_journal_path, 0, MOPT_STRING}, 13700efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 13718dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13728dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13738dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 13748dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 137526092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 137626092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 137726092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 137826092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 137926092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 138026092bf5STheodore Ts'o #else 138126092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 138226092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 138326092bf5STheodore Ts'o #endif 138426092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 138526092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 138626092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 138726092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 138826092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 138926092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 139026092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 139126092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 139226092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 139326092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 139426092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 139526092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 139626092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 139726092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 139826092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 139926092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1400df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 140126092bf5STheodore Ts'o {Opt_err, 0, 0} 140226092bf5STheodore Ts'o }; 140326092bf5STheodore Ts'o 140426092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 140526092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 140626092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 140726092bf5STheodore Ts'o { 140826092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 140926092bf5STheodore Ts'o const struct mount_opts *m; 141008cefc7aSEric W. Biederman kuid_t uid; 141108cefc7aSEric W. Biederman kgid_t gid; 141226092bf5STheodore Ts'o int arg = 0; 141326092bf5STheodore Ts'o 141457f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 141557f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 141657f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 141757f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 141857f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 141957f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 142057f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 142157f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 142257f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 142357f73c2cSTheodore Ts'o #endif 142426092bf5STheodore Ts'o switch (token) { 1425f7048605STheodore Ts'o case Opt_noacl: 1426f7048605STheodore Ts'o case Opt_nouser_xattr: 1427f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1428f7048605STheodore Ts'o break; 142926092bf5STheodore Ts'o case Opt_sb: 143026092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 143126092bf5STheodore Ts'o case Opt_removed: 14325f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 143326092bf5STheodore Ts'o return 1; 143426092bf5STheodore Ts'o case Opt_abort: 143526092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 143626092bf5STheodore Ts'o return 1; 143726092bf5STheodore Ts'o case Opt_i_version: 143826092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 143926092bf5STheodore Ts'o return 1; 1440a26f4992STheodore Ts'o case Opt_lazytime: 1441a26f4992STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 1442a26f4992STheodore Ts'o return 1; 1443a26f4992STheodore Ts'o case Opt_nolazytime: 1444a26f4992STheodore Ts'o sb->s_flags &= ~MS_LAZYTIME; 1445a26f4992STheodore Ts'o return 1; 144626092bf5STheodore Ts'o } 144726092bf5STheodore Ts'o 14485f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14495f3633e3SJan Kara if (token == m->token) 14505f3633e3SJan Kara break; 14515f3633e3SJan Kara 14525f3633e3SJan Kara if (m->token == Opt_err) { 14535f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 14545f3633e3SJan Kara "or missing value", opt); 14555f3633e3SJan Kara return -1; 14565f3633e3SJan Kara } 14575f3633e3SJan Kara 14588dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 14598dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14608dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 14618dc0aa8cSTheodore Ts'o return -1; 14628dc0aa8cSTheodore Ts'o } 14638dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 14648dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14658dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 14668dc0aa8cSTheodore Ts'o return -1; 14678dc0aa8cSTheodore Ts'o } 14688dc0aa8cSTheodore Ts'o 1469ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 14700efb3b23SJan Kara return -1; 147126092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 147226092bf5STheodore Ts'o return -1; 147326092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 147426092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 147526092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 147626092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 147726092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 147826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 147926092bf5STheodore Ts'o "options when quota turned on"); 148026092bf5STheodore Ts'o return -1; 148126092bf5STheodore Ts'o } 148226092bf5STheodore Ts'o 148326092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 148426092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 148526092bf5STheodore Ts'o } else if (token == Opt_commit) { 148626092bf5STheodore Ts'o if (arg == 0) 148726092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 148826092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 148926092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 149026092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 149126092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 149226092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 149326092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1494e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1495e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1496e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1497e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 149826092bf5STheodore Ts'o return -1; 149926092bf5STheodore Ts'o } 150026092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 150126092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 150226092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 150326092bf5STheodore Ts'o if (!args->from) 150426092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 150526092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1506df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1507df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 150826092bf5STheodore Ts'o } else if (token == Opt_stripe) { 150926092bf5STheodore Ts'o sbi->s_stripe = arg; 15100efb3b23SJan Kara } else if (token == Opt_resuid) { 15110efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15120efb3b23SJan Kara if (!uid_valid(uid)) { 15135f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15140efb3b23SJan Kara return -1; 15150efb3b23SJan Kara } 15160efb3b23SJan Kara sbi->s_resuid = uid; 15170efb3b23SJan Kara } else if (token == Opt_resgid) { 15180efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15190efb3b23SJan Kara if (!gid_valid(gid)) { 15205f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15210efb3b23SJan Kara return -1; 15220efb3b23SJan Kara } 15230efb3b23SJan Kara sbi->s_resgid = gid; 15240efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15250efb3b23SJan Kara if (is_remount) { 15260efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15270efb3b23SJan Kara "Cannot specify journal on remount"); 15280efb3b23SJan Kara return -1; 15290efb3b23SJan Kara } 15300efb3b23SJan Kara *journal_devnum = arg; 1531ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1532ad4eec61SEric Sandeen char *journal_path; 1533ad4eec61SEric Sandeen struct inode *journal_inode; 1534ad4eec61SEric Sandeen struct path path; 1535ad4eec61SEric Sandeen int error; 1536ad4eec61SEric Sandeen 1537ad4eec61SEric Sandeen if (is_remount) { 1538ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1539ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1540ad4eec61SEric Sandeen return -1; 1541ad4eec61SEric Sandeen } 1542ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1543ad4eec61SEric Sandeen if (!journal_path) { 1544ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1545ad4eec61SEric Sandeen "journal device string"); 1546ad4eec61SEric Sandeen return -1; 1547ad4eec61SEric Sandeen } 1548ad4eec61SEric Sandeen 1549ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1550ad4eec61SEric Sandeen if (error) { 1551ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1552ad4eec61SEric Sandeen "journal device path: error %d", error); 1553ad4eec61SEric Sandeen kfree(journal_path); 1554ad4eec61SEric Sandeen return -1; 1555ad4eec61SEric Sandeen } 1556ad4eec61SEric Sandeen 1557ad4eec61SEric Sandeen journal_inode = path.dentry->d_inode; 1558ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1559ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1560ad4eec61SEric Sandeen "is not a block device", journal_path); 1561ad4eec61SEric Sandeen path_put(&path); 1562ad4eec61SEric Sandeen kfree(journal_path); 1563ad4eec61SEric Sandeen return -1; 1564ad4eec61SEric Sandeen } 1565ad4eec61SEric Sandeen 1566ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1567ad4eec61SEric Sandeen path_put(&path); 1568ad4eec61SEric Sandeen kfree(journal_path); 15690efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 15700efb3b23SJan Kara if (arg > 7) { 15715f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 15720efb3b23SJan Kara " (must be 0-7)"); 15730efb3b23SJan Kara return -1; 15740efb3b23SJan Kara } 15750efb3b23SJan Kara *journal_ioprio = 15760efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 157726092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 157826092bf5STheodore Ts'o if (is_remount) { 157926092bf5STheodore Ts'o if (!sbi->s_journal) 158026092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 15815f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 158226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 158326092bf5STheodore Ts'o "Cannot change data mode on remount"); 158426092bf5STheodore Ts'o return -1; 158526092bf5STheodore Ts'o } 158626092bf5STheodore Ts'o } else { 158726092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 158826092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 158926092bf5STheodore Ts'o } 159026092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 159126092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 159226092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 159326092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 15945f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 15955f3633e3SJan Kara "quota options when quota turned on"); 159626092bf5STheodore Ts'o return -1; 159726092bf5STheodore Ts'o } 1598262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1599262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1600262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1601262b4662SJan Kara "Cannot set journaled quota options " 1602262b4662SJan Kara "when QUOTA feature is enabled"); 1603262b4662SJan Kara return -1; 1604262b4662SJan Kara } 160526092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 160626092bf5STheodore Ts'o #endif 1607923ae0ffSRoss Zwisler #ifndef CONFIG_FS_DAX 1608923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1609923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1610923ae0ffSRoss Zwisler return -1; 1611923ae0ffSRoss Zwisler #endif 161226092bf5STheodore Ts'o } else { 161326092bf5STheodore Ts'o if (!args->from) 161426092bf5STheodore Ts'o arg = 1; 161526092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 161626092bf5STheodore Ts'o arg = !arg; 161726092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 161826092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 161926092bf5STheodore Ts'o "buggy handling of option %s", opt); 162026092bf5STheodore Ts'o WARN_ON(1); 162126092bf5STheodore Ts'o return -1; 162226092bf5STheodore Ts'o } 162326092bf5STheodore Ts'o if (arg != 0) 162426092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 162526092bf5STheodore Ts'o else 162626092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 162726092bf5STheodore Ts'o } 162826092bf5STheodore Ts'o return 1; 162926092bf5STheodore Ts'o } 163026092bf5STheodore Ts'o 1631ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1632c3191067STheodore Ts'o unsigned long *journal_devnum, 1633b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1634661aa520SEric Sandeen int is_remount) 1635ac27a0ecSDave Kleikamp { 1636617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1637ac27a0ecSDave Kleikamp char *p; 1638ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 163926092bf5STheodore Ts'o int token; 1640ac27a0ecSDave Kleikamp 1641ac27a0ecSDave Kleikamp if (!options) 1642ac27a0ecSDave Kleikamp return 1; 1643ac27a0ecSDave Kleikamp 1644ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1645ac27a0ecSDave Kleikamp if (!*p) 1646ac27a0ecSDave Kleikamp continue; 164715121c18SEric Sandeen /* 164815121c18SEric Sandeen * Initialize args struct so we know whether arg was 164915121c18SEric Sandeen * found; some options take optional arguments. 165015121c18SEric Sandeen */ 1651caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1652ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 165326092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 165426092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1655ac27a0ecSDave Kleikamp return 0; 1656ac27a0ecSDave Kleikamp } 1657ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1658262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1659262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1660262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1661262b4662SJan Kara "feature is enabled"); 1662262b4662SJan Kara return 0; 1663262b4662SJan Kara } 1664ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1665482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1666fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1667ac27a0ecSDave Kleikamp 1668482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1669fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1670ac27a0ecSDave Kleikamp 167156c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1672b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1673b31e1552SEric Sandeen "format mixing"); 1674ac27a0ecSDave Kleikamp return 0; 1675ac27a0ecSDave Kleikamp } 1676ac27a0ecSDave Kleikamp 1677ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1678b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1679b31e1552SEric Sandeen "not specified"); 1680ac27a0ecSDave Kleikamp return 0; 1681ac27a0ecSDave Kleikamp } 1682ac27a0ecSDave Kleikamp } 1683ac27a0ecSDave Kleikamp #endif 1684261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1685261cb20cSJan Kara int blocksize = 1686261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1687261cb20cSJan Kara 1688261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1689261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1690261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1691261cb20cSJan Kara return 0; 1692261cb20cSJan Kara } 1693261cb20cSJan Kara } 1694d4f76107SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 1695d4f76107SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 1696d4f76107SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " 1697d4f76107SJan Kara "in data=ordered mode"); 1698d4f76107SJan Kara return 0; 1699d4f76107SJan Kara } 1700ac27a0ecSDave Kleikamp return 1; 1701ac27a0ecSDave Kleikamp } 1702ac27a0ecSDave Kleikamp 17032adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17042adf6da8STheodore Ts'o struct super_block *sb) 17052adf6da8STheodore Ts'o { 17062adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17072adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17082adf6da8STheodore Ts'o 17092adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17102adf6da8STheodore Ts'o char *fmtname = ""; 17112adf6da8STheodore Ts'o 17122adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17132adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17142adf6da8STheodore Ts'o fmtname = "vfsold"; 17152adf6da8STheodore Ts'o break; 17162adf6da8STheodore Ts'o case QFMT_VFS_V0: 17172adf6da8STheodore Ts'o fmtname = "vfsv0"; 17182adf6da8STheodore Ts'o break; 17192adf6da8STheodore Ts'o case QFMT_VFS_V1: 17202adf6da8STheodore Ts'o fmtname = "vfsv1"; 17212adf6da8STheodore Ts'o break; 17222adf6da8STheodore Ts'o } 17232adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17242adf6da8STheodore Ts'o } 17252adf6da8STheodore Ts'o 17262adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17272adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17282adf6da8STheodore Ts'o 17292adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17302adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17312adf6da8STheodore Ts'o #endif 17322adf6da8STheodore Ts'o } 17332adf6da8STheodore Ts'o 17345a916be1STheodore Ts'o static const char *token2str(int token) 17355a916be1STheodore Ts'o { 173650df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17375a916be1STheodore Ts'o 17385a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17395a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17405a916be1STheodore Ts'o break; 17415a916be1STheodore Ts'o return t->pattern; 17425a916be1STheodore Ts'o } 17435a916be1STheodore Ts'o 17442adf6da8STheodore Ts'o /* 17452adf6da8STheodore Ts'o * Show an option if 17462adf6da8STheodore Ts'o * - it's set to a non-default value OR 17472adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17482adf6da8STheodore Ts'o */ 174966acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 175066acdcf4STheodore Ts'o int nodefs) 17512adf6da8STheodore Ts'o { 17522adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17532adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 175466acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17555a916be1STheodore Ts'o const struct mount_opts *m; 175666acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17572adf6da8STheodore Ts'o 175866acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 175966acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17602adf6da8STheodore Ts'o 17612adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17625a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17635a916be1STheodore Ts'o 17645a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17655a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17665a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17675a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17685a916be1STheodore Ts'o continue; 176966acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17705a916be1STheodore Ts'o continue; /* skip if same as the default */ 17715a916be1STheodore Ts'o if ((want_set && 17725a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17735a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17745a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17755a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17765a916be1STheodore Ts'o } 17775a916be1STheodore Ts'o 177808cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17795a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 178008cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 178108cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 178208cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 17835a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 178408cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 178508cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 178666acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 17875a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 17885a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 17892adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 17905a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 17912adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 17925a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 179366acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 17945a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 179566acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 17965a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 179766acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 17985a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 17992adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18005a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 180166acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18025a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 180366acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18042adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18055a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18062adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18075a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18082adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18095a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18105a916be1STheodore Ts'o } 181166acdcf4STheodore Ts'o if (nodefs || 181266acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18135a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18142adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18152adf6da8STheodore Ts'o 181666acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 181766acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18185a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1819df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1820df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18212adf6da8STheodore Ts'o 18222adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18232adf6da8STheodore Ts'o return 0; 18242adf6da8STheodore Ts'o } 18252adf6da8STheodore Ts'o 182666acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 182766acdcf4STheodore Ts'o { 182866acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 182966acdcf4STheodore Ts'o } 183066acdcf4STheodore Ts'o 183166acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 183266acdcf4STheodore Ts'o { 183366acdcf4STheodore Ts'o struct super_block *sb = seq->private; 183466acdcf4STheodore Ts'o int rc; 183566acdcf4STheodore Ts'o 183666acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 183766acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 183866acdcf4STheodore Ts'o seq_puts(seq, "\n"); 183966acdcf4STheodore Ts'o return rc; 184066acdcf4STheodore Ts'o } 184166acdcf4STheodore Ts'o 184266acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 184366acdcf4STheodore Ts'o { 1844d9dda78bSAl Viro return single_open(file, options_seq_show, PDE_DATA(inode)); 184566acdcf4STheodore Ts'o } 184666acdcf4STheodore Ts'o 184766acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 184866acdcf4STheodore Ts'o .owner = THIS_MODULE, 184966acdcf4STheodore Ts'o .open = options_open_fs, 185066acdcf4STheodore Ts'o .read = seq_read, 185166acdcf4STheodore Ts'o .llseek = seq_lseek, 185266acdcf4STheodore Ts'o .release = single_release, 185366acdcf4STheodore Ts'o }; 185466acdcf4STheodore Ts'o 1855617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1856ac27a0ecSDave Kleikamp int read_only) 1857ac27a0ecSDave Kleikamp { 1858617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1859ac27a0ecSDave Kleikamp int res = 0; 1860ac27a0ecSDave Kleikamp 1861617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1862b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1863b31e1552SEric Sandeen "forcing read-only mode"); 1864ac27a0ecSDave Kleikamp res = MS_RDONLY; 1865ac27a0ecSDave Kleikamp } 1866ac27a0ecSDave Kleikamp if (read_only) 1867281b5995STheodore Ts'o goto done; 1868617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1869b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1870b31e1552SEric Sandeen "running e2fsck is recommended"); 1871c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 1872b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1873b31e1552SEric Sandeen "warning: mounting fs with errors, " 1874b31e1552SEric Sandeen "running e2fsck is recommended"); 1875ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1876ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1877ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1878b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1879b31e1552SEric Sandeen "warning: maximal mount count reached, " 1880b31e1552SEric Sandeen "running e2fsck is recommended"); 1881ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1882ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1883ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1884b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1885b31e1552SEric Sandeen "warning: checktime reached, " 1886b31e1552SEric Sandeen "running e2fsck is recommended"); 18870390131bSFrank Mayhar if (!sbi->s_journal) 1888216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1889ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1890617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1891e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1892ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1893617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 18940390131bSFrank Mayhar if (sbi->s_journal) 1895617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1896ac27a0ecSDave Kleikamp 1897e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1898281b5995STheodore Ts'o done: 1899ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1900a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1901a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1902ac27a0ecSDave Kleikamp sb->s_blocksize, 1903ac27a0ecSDave Kleikamp sbi->s_groups_count, 1904617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1905617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1906a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1907ac27a0ecSDave Kleikamp 19087abc52c2SDan Magenheimer cleancache_init_fs(sb); 1909ac27a0ecSDave Kleikamp return res; 1910ac27a0ecSDave Kleikamp } 1911ac27a0ecSDave Kleikamp 1912117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1913117fff10STheodore Ts'o { 1914117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1915117fff10STheodore Ts'o struct flex_groups *new_groups; 1916117fff10STheodore Ts'o int size; 1917117fff10STheodore Ts'o 1918117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1919117fff10STheodore Ts'o return 0; 1920117fff10STheodore Ts'o 1921117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1922117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1923117fff10STheodore Ts'o return 0; 1924117fff10STheodore Ts'o 1925117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1926117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1927117fff10STheodore Ts'o if (!new_groups) { 1928117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1929117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1930117fff10STheodore Ts'o return -ENOMEM; 1931117fff10STheodore Ts'o } 1932117fff10STheodore Ts'o 1933117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1934117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1935117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1936117fff10STheodore Ts'o sizeof(struct flex_groups))); 1937b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 1938117fff10STheodore Ts'o } 1939117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1940117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1941117fff10STheodore Ts'o return 0; 1942117fff10STheodore Ts'o } 1943117fff10STheodore Ts'o 1944772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1945772cb7c8SJose R. Santos { 1946772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1947772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1948772cb7c8SJose R. Santos ext4_group_t flex_group; 1949117fff10STheodore Ts'o int i, err; 1950772cb7c8SJose R. Santos 1951503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1952d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1953772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1954772cb7c8SJose R. Santos return 1; 1955772cb7c8SJose R. Santos } 1956772cb7c8SJose R. Santos 1957117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1958117fff10STheodore Ts'o if (err) 1959772cb7c8SJose R. Santos goto failed; 1960772cb7c8SJose R. Santos 1961772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 196288b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1963772cb7c8SJose R. Santos 1964772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19657ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19667ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 196790ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 196824aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19697ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19707ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1971772cb7c8SJose R. Santos } 1972772cb7c8SJose R. Santos 1973772cb7c8SJose R. Santos return 1; 1974772cb7c8SJose R. Santos failed: 1975772cb7c8SJose R. Santos return 0; 1976772cb7c8SJose R. Santos } 1977772cb7c8SJose R. Santos 1978feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1979717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1980717d50e4SAndreas Dilger { 1981feb0ab32SDarrick J. Wong int offset; 1982717d50e4SAndreas Dilger __u16 crc = 0; 1983717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1984717d50e4SAndreas Dilger 19859aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 1986feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1987d6a77105STheodore Ts'o __le16 save_csum; 1988feb0ab32SDarrick J. Wong __u32 csum32; 1989feb0ab32SDarrick J. Wong 1990d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 1991feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 1992feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 1993feb0ab32SDarrick J. Wong sizeof(le_group)); 1994feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 1995feb0ab32SDarrick J. Wong sbi->s_desc_size); 1996d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 1997feb0ab32SDarrick J. Wong 1998feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 1999feb0ab32SDarrick J. Wong goto out; 2000feb0ab32SDarrick J. Wong } 2001feb0ab32SDarrick J. Wong 2002feb0ab32SDarrick J. Wong /* old crc16 code */ 2003813d32f9SDarrick J. Wong if (!(sbi->s_es->s_feature_ro_compat & 2004813d32f9SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM))) 2005813d32f9SDarrick J. Wong return 0; 2006813d32f9SDarrick J. Wong 2007feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2008feb0ab32SDarrick J. Wong 2009717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2010717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2011717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2012717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2013717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2014717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2015717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2016717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2017717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2018717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2019717d50e4SAndreas Dilger offset); 2020717d50e4SAndreas Dilger 2021feb0ab32SDarrick J. Wong out: 2022717d50e4SAndreas Dilger return cpu_to_le16(crc); 2023717d50e4SAndreas Dilger } 2024717d50e4SAndreas Dilger 2025feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2026717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2027717d50e4SAndreas Dilger { 2028feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2029feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2030feb0ab32SDarrick J. Wong block_group, gdp))) 2031717d50e4SAndreas Dilger return 0; 2032717d50e4SAndreas Dilger 2033717d50e4SAndreas Dilger return 1; 2034717d50e4SAndreas Dilger } 2035717d50e4SAndreas Dilger 2036feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2037feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2038feb0ab32SDarrick J. Wong { 2039feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2040feb0ab32SDarrick J. Wong return; 2041feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2042feb0ab32SDarrick J. Wong } 2043feb0ab32SDarrick J. Wong 2044ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2045bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2046bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2047ac27a0ecSDave Kleikamp { 2048617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2049617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2050617ba13bSMingming Cao ext4_fsblk_t last_block; 2051bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2052bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2053bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2054ce421581SJose R. Santos int flexbg_flag = 0; 2055bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2056ac27a0ecSDave Kleikamp 2057ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2058ce421581SJose R. Santos flexbg_flag = 1; 2059ce421581SJose R. Santos 2060617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2061ac27a0ecSDave Kleikamp 2062197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2063197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2064197cd65aSAkinobu Mita 2065ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2066bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2067ac27a0ecSDave Kleikamp else 2068ac27a0ecSDave Kleikamp last_block = first_block + 2069617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2070ac27a0ecSDave Kleikamp 2071bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2072bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2073bfff6873SLukas Czerner grp = i; 2074bfff6873SLukas Czerner 20758fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20762b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2077b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2078a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2079b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2080ac27a0ecSDave Kleikamp return 0; 2081ac27a0ecSDave Kleikamp } 20828fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20832b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2084b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2085a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2086b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2087ac27a0ecSDave Kleikamp return 0; 2088ac27a0ecSDave Kleikamp } 20898fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2090bd81d8eeSLaurent Vivier if (inode_table < first_block || 20912b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2092b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2093a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2094b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2095ac27a0ecSDave Kleikamp return 0; 2096ac27a0ecSDave Kleikamp } 2097955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2098feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2099b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2100b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2101fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2102fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21037ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2104955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2105717d50e4SAndreas Dilger return 0; 2106717d50e4SAndreas Dilger } 21077ee1ec4cSLi Zefan } 2108955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2109ce421581SJose R. Santos if (!flexbg_flag) 2110617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2111ac27a0ecSDave Kleikamp } 2112bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2113bfff6873SLukas Czerner *first_not_zeroed = grp; 2114ac27a0ecSDave Kleikamp return 1; 2115ac27a0ecSDave Kleikamp } 2116ac27a0ecSDave Kleikamp 2117617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2118ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2119ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2120ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2121ac27a0ecSDave Kleikamp * 2122ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2123ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2124ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2125ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2126ac27a0ecSDave Kleikamp * 2127ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2128ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2129ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2130617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2131ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2132ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2133ac27a0ecSDave Kleikamp */ 2134617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2135617ba13bSMingming Cao struct ext4_super_block *es) 2136ac27a0ecSDave Kleikamp { 2137ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2138ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2139ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2140ac27a0ecSDave Kleikamp int i; 2141ac27a0ecSDave Kleikamp #endif 2142ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2143ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2144ac27a0ecSDave Kleikamp return; 2145ac27a0ecSDave Kleikamp } 2146ac27a0ecSDave Kleikamp 2147a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2148b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2149b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2150a8f48a95SEric Sandeen return; 2151a8f48a95SEric Sandeen } 2152a8f48a95SEric Sandeen 2153d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2154d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2155d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2156d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2157d39195c3SAmir Goldstein return; 2158d39195c3SAmir Goldstein } 2159d39195c3SAmir Goldstein 2160617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2161c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2162c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 216384474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2164ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2165ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2166c25f9bc6SEric Sandeen } 2167ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2168ac27a0ecSDave Kleikamp return; 2169ac27a0ecSDave Kleikamp } 2170ac27a0ecSDave Kleikamp 2171ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2172b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2173ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2174ac27a0ecSDave Kleikamp } 2175ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2176ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2177ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2178ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2179a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2180617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2181617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2182ac27a0ecSDave Kleikamp if (ret < 0) 2183b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2184b31e1552SEric Sandeen "Cannot turn on journaled " 2185b31e1552SEric Sandeen "quota: error %d", ret); 2186ac27a0ecSDave Kleikamp } 2187ac27a0ecSDave Kleikamp } 2188ac27a0ecSDave Kleikamp #endif 2189ac27a0ecSDave Kleikamp 2190ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2191ac27a0ecSDave Kleikamp struct inode *inode; 2192ac27a0ecSDave Kleikamp 219397bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 219497bd42b9SJosef Bacik if (IS_ERR(inode)) { 2195ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2196ac27a0ecSDave Kleikamp break; 2197ac27a0ecSDave Kleikamp } 2198ac27a0ecSDave Kleikamp 2199617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2200871a2931SChristoph Hellwig dquot_initialize(inode); 2201ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2202566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2203b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2204b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 220546e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2206e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2207ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2208721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 220955f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2210617ba13bSMingming Cao ext4_truncate(inode); 2211721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2212ac27a0ecSDave Kleikamp nr_truncates++; 2213ac27a0ecSDave Kleikamp } else { 2214566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2215b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2216b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 221746e665e9SHarvey Harrison __func__, inode->i_ino); 2218ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2219ac27a0ecSDave Kleikamp inode->i_ino); 2220ac27a0ecSDave Kleikamp nr_orphans++; 2221ac27a0ecSDave Kleikamp } 2222ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2223ac27a0ecSDave Kleikamp } 2224ac27a0ecSDave Kleikamp 2225ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2226ac27a0ecSDave Kleikamp 2227ac27a0ecSDave Kleikamp if (nr_orphans) 2228b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2229b31e1552SEric Sandeen PLURAL(nr_orphans)); 2230ac27a0ecSDave Kleikamp if (nr_truncates) 2231b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2232b31e1552SEric Sandeen PLURAL(nr_truncates)); 2233ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2234ac27a0ecSDave Kleikamp /* Turn quotas off */ 2235a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2236ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2237287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2238ac27a0ecSDave Kleikamp } 2239ac27a0ecSDave Kleikamp #endif 2240ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2241ac27a0ecSDave Kleikamp } 22420b8e58a1SAndreas Dilger 2243cd2291a4SEric Sandeen /* 2244cd2291a4SEric Sandeen * Maximal extent format file size. 2245cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2246cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2247cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2248cd2291a4SEric Sandeen * so that won't be a limiting factor. 2249cd2291a4SEric Sandeen * 2250f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2251f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2252f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2253f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2254f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2255f17722f9SLukas Czerner * 2256cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2257cd2291a4SEric Sandeen */ 2258f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2259cd2291a4SEric Sandeen { 2260cd2291a4SEric Sandeen loff_t res; 2261cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2262cd2291a4SEric Sandeen 2263cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2264f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2265cd2291a4SEric Sandeen /* 226690c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2267cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2268cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2269cd2291a4SEric Sandeen */ 2270cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2271cd2291a4SEric Sandeen 2272cd2291a4SEric Sandeen /* total blocks in file system block size */ 2273cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2274cd2291a4SEric Sandeen upper_limit <<= blkbits; 2275cd2291a4SEric Sandeen } 2276cd2291a4SEric Sandeen 2277f17722f9SLukas Czerner /* 2278f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2279f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2280f17722f9SLukas Czerner * size 2281f17722f9SLukas Czerner */ 2282f17722f9SLukas Czerner res = (1LL << 32) - 1; 2283cd2291a4SEric Sandeen res <<= blkbits; 2284cd2291a4SEric Sandeen 2285cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2286cd2291a4SEric Sandeen if (res > upper_limit) 2287cd2291a4SEric Sandeen res = upper_limit; 2288cd2291a4SEric Sandeen 2289cd2291a4SEric Sandeen return res; 2290cd2291a4SEric Sandeen } 2291ac27a0ecSDave Kleikamp 2292ac27a0ecSDave Kleikamp /* 2293cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22940fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22950fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2296ac27a0ecSDave Kleikamp */ 2297f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2298ac27a0ecSDave Kleikamp { 2299617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23000fc1b451SAneesh Kumar K.V int meta_blocks; 23010fc1b451SAneesh Kumar K.V loff_t upper_limit; 23020b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23030b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23040b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23050b8e58a1SAndreas Dilger * 23060b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23070b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23080fc1b451SAneesh Kumar K.V */ 23090fc1b451SAneesh Kumar K.V 2310f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23110fc1b451SAneesh Kumar K.V /* 231290c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23130b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23140b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23150fc1b451SAneesh Kumar K.V */ 23160fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23170fc1b451SAneesh Kumar K.V 23180fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23190fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23200fc1b451SAneesh Kumar K.V 23210fc1b451SAneesh Kumar K.V } else { 23228180a562SAneesh Kumar K.V /* 23238180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23248180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23258180a562SAneesh Kumar K.V * represent total number of blocks in 23268180a562SAneesh Kumar K.V * file system block size 23278180a562SAneesh Kumar K.V */ 23280fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23290fc1b451SAneesh Kumar K.V 23300fc1b451SAneesh Kumar K.V } 23310fc1b451SAneesh Kumar K.V 23320fc1b451SAneesh Kumar K.V /* indirect blocks */ 23330fc1b451SAneesh Kumar K.V meta_blocks = 1; 23340fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23350fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23360fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23370fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23380fc1b451SAneesh Kumar K.V 23390fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23400fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2341ac27a0ecSDave Kleikamp 2342ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2343ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2344ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2345ac27a0ecSDave Kleikamp res <<= bits; 2346ac27a0ecSDave Kleikamp if (res > upper_limit) 2347ac27a0ecSDave Kleikamp res = upper_limit; 23480fc1b451SAneesh Kumar K.V 23490fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23500fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23510fc1b451SAneesh Kumar K.V 2352ac27a0ecSDave Kleikamp return res; 2353ac27a0ecSDave Kleikamp } 2354ac27a0ecSDave Kleikamp 2355617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 235670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2357ac27a0ecSDave Kleikamp { 2358617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2359fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2360ac27a0ecSDave Kleikamp int has_super = 0; 2361ac27a0ecSDave Kleikamp 2362ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2363ac27a0ecSDave Kleikamp 2364617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2365ac27a0ecSDave Kleikamp nr < first_meta_bg) 236670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2367ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2368617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2369ac27a0ecSDave Kleikamp has_super = 1; 23700b8e58a1SAndreas Dilger 2371bd63f6b0SDarrick J. Wong /* 2372bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2373bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2374bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2375bd63f6b0SDarrick J. Wong * compensate. 2376bd63f6b0SDarrick J. Wong */ 2377bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2378bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2379bd63f6b0SDarrick J. Wong has_super++; 2380bd63f6b0SDarrick J. Wong 2381617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2382ac27a0ecSDave Kleikamp } 2383ac27a0ecSDave Kleikamp 2384c9de560dSAlex Tomas /** 2385c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2386c9de560dSAlex Tomas * @sbi: In memory super block info 2387c9de560dSAlex Tomas * 2388c9de560dSAlex Tomas * If we have specified it via mount option, then 2389c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2390c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2391c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2392c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2393c9de560dSAlex Tomas * 2394c9de560dSAlex Tomas */ 2395c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2396c9de560dSAlex Tomas { 2397c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2398c9de560dSAlex Tomas unsigned long stripe_width = 2399c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24003eb08658SDan Ehrenberg int ret; 2401c9de560dSAlex Tomas 2402c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24033eb08658SDan Ehrenberg ret = sbi->s_stripe; 24043eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24053eb08658SDan Ehrenberg ret = stripe_width; 24063eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24073eb08658SDan Ehrenberg ret = stride; 24083eb08658SDan Ehrenberg else 24093eb08658SDan Ehrenberg ret = 0; 2410c9de560dSAlex Tomas 24113eb08658SDan Ehrenberg /* 24123eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24133eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24143eb08658SDan Ehrenberg */ 24153eb08658SDan Ehrenberg if (ret <= 1) 24163eb08658SDan Ehrenberg ret = 0; 2417c9de560dSAlex Tomas 24183eb08658SDan Ehrenberg return ret; 2419c9de560dSAlex Tomas } 2420ac27a0ecSDave Kleikamp 24213197ebdbSTheodore Ts'o /* sysfs supprt */ 24223197ebdbSTheodore Ts'o 24233197ebdbSTheodore Ts'o struct ext4_attr { 24243197ebdbSTheodore Ts'o struct attribute attr; 24253197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24263197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24273197ebdbSTheodore Ts'o const char *, size_t); 2428f2d50a65SJan Kara union { 24293197ebdbSTheodore Ts'o int offset; 2430f2d50a65SJan Kara int deprecated_val; 2431f2d50a65SJan Kara } u; 24323197ebdbSTheodore Ts'o }; 24333197ebdbSTheodore Ts'o 243427dd4385SLukas Czerner static int parse_strtoull(const char *buf, 243527dd4385SLukas Czerner unsigned long long max, unsigned long long *value) 243627dd4385SLukas Czerner { 243727dd4385SLukas Czerner int ret; 243827dd4385SLukas Czerner 243927dd4385SLukas Czerner ret = kstrtoull(skip_spaces(buf), 0, value); 244027dd4385SLukas Czerner if (!ret && *value > max) 244127dd4385SLukas Czerner ret = -EINVAL; 244227dd4385SLukas Czerner return ret; 244327dd4385SLukas Czerner } 244427dd4385SLukas Czerner 24453197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24463197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24473197ebdbSTheodore Ts'o char *buf) 24483197ebdbSTheodore Ts'o { 24493197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24507b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24517b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24523197ebdbSTheodore Ts'o } 24533197ebdbSTheodore Ts'o 24543197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24553197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24563197ebdbSTheodore Ts'o { 24573197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24583197ebdbSTheodore Ts'o 2459f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2460f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24613197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24623197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24633197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24643197ebdbSTheodore Ts'o } 24653197ebdbSTheodore Ts'o 24663197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24673197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24683197ebdbSTheodore Ts'o { 24693197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24703197ebdbSTheodore Ts'o 2471f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2472f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24733197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2474a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24753197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2476a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24773197ebdbSTheodore Ts'o } 24783197ebdbSTheodore Ts'o 24793197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24803197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24813197ebdbSTheodore Ts'o const char *buf, size_t count) 24823197ebdbSTheodore Ts'o { 24833197ebdbSTheodore Ts'o unsigned long t; 2484e1091b15SLukas Czerner int ret; 24853197ebdbSTheodore Ts'o 2486e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2487e1091b15SLukas Czerner if (ret) 2488e1091b15SLukas Czerner return ret; 24893197ebdbSTheodore Ts'o 2490e1091b15SLukas Czerner if (t && (!is_power_of_2(t) || t > 0x40000000)) 24913197ebdbSTheodore Ts'o return -EINVAL; 24923197ebdbSTheodore Ts'o 24933197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24943197ebdbSTheodore Ts'o return count; 24953197ebdbSTheodore Ts'o } 24963197ebdbSTheodore Ts'o 24973197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24983197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24993197ebdbSTheodore Ts'o { 2500f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25013197ebdbSTheodore Ts'o 25023197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25033197ebdbSTheodore Ts'o } 25043197ebdbSTheodore Ts'o 25053197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25063197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25073197ebdbSTheodore Ts'o const char *buf, size_t count) 25083197ebdbSTheodore Ts'o { 2509f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25103197ebdbSTheodore Ts'o unsigned long t; 2511e1091b15SLukas Czerner int ret; 25123197ebdbSTheodore Ts'o 2513e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2514e1091b15SLukas Czerner if (ret) 2515e1091b15SLukas Czerner return ret; 25163197ebdbSTheodore Ts'o *ui = t; 25173197ebdbSTheodore Ts'o return count; 25183197ebdbSTheodore Ts'o } 25193197ebdbSTheodore Ts'o 252052c198c6SLukas Czerner static ssize_t es_ui_show(struct ext4_attr *a, 252152c198c6SLukas Czerner struct ext4_sb_info *sbi, char *buf) 252252c198c6SLukas Czerner { 252352c198c6SLukas Czerner 252452c198c6SLukas Czerner unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) + 252552c198c6SLukas Czerner a->u.offset); 252652c198c6SLukas Czerner 252752c198c6SLukas Czerner return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 252852c198c6SLukas Czerner } 252952c198c6SLukas Czerner 253027dd4385SLukas Czerner static ssize_t reserved_clusters_show(struct ext4_attr *a, 253127dd4385SLukas Czerner struct ext4_sb_info *sbi, char *buf) 253227dd4385SLukas Czerner { 253327dd4385SLukas Czerner return snprintf(buf, PAGE_SIZE, "%llu\n", 253427dd4385SLukas Czerner (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); 253527dd4385SLukas Czerner } 253627dd4385SLukas Czerner 253727dd4385SLukas Czerner static ssize_t reserved_clusters_store(struct ext4_attr *a, 253827dd4385SLukas Czerner struct ext4_sb_info *sbi, 253927dd4385SLukas Czerner const char *buf, size_t count) 254027dd4385SLukas Czerner { 254127dd4385SLukas Czerner unsigned long long val; 254227dd4385SLukas Czerner int ret; 254327dd4385SLukas Czerner 254427dd4385SLukas Czerner if (parse_strtoull(buf, -1ULL, &val)) 254527dd4385SLukas Czerner return -EINVAL; 254627dd4385SLukas Czerner ret = ext4_reserve_clusters(sbi, val); 254727dd4385SLukas Czerner 254827dd4385SLukas Czerner return ret ? ret : count; 254927dd4385SLukas Czerner } 255027dd4385SLukas Czerner 25512c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25522c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25532c0544b2STheodore Ts'o const char *buf, size_t count) 25542c0544b2STheodore Ts'o { 25552c0544b2STheodore Ts'o int len = count; 25562c0544b2STheodore Ts'o 25572c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25582c0544b2STheodore Ts'o return -EPERM; 25592c0544b2STheodore Ts'o 25602c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25612c0544b2STheodore Ts'o len--; 25622c0544b2STheodore Ts'o 25632c0544b2STheodore Ts'o if (len) 25642c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25652c0544b2STheodore Ts'o return count; 25662c0544b2STheodore Ts'o } 25672c0544b2STheodore Ts'o 2568f2d50a65SJan Kara static ssize_t sbi_deprecated_show(struct ext4_attr *a, 2569f2d50a65SJan Kara struct ext4_sb_info *sbi, char *buf) 2570f2d50a65SJan Kara { 2571f2d50a65SJan Kara return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); 2572f2d50a65SJan Kara } 2573f2d50a65SJan Kara 25743197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25753197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25763197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25773197ebdbSTheodore Ts'o .show = _show, \ 25783197ebdbSTheodore Ts'o .store = _store, \ 2579f2d50a65SJan Kara .u = { \ 25803197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname),\ 2581f2d50a65SJan Kara }, \ 25823197ebdbSTheodore Ts'o } 258352c198c6SLukas Czerner 258452c198c6SLukas Czerner #define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \ 258552c198c6SLukas Czerner static struct ext4_attr ext4_attr_##_name = { \ 258652c198c6SLukas Czerner .attr = {.name = __stringify(_name), .mode = _mode }, \ 258752c198c6SLukas Czerner .show = _show, \ 258852c198c6SLukas Czerner .store = _store, \ 258952c198c6SLukas Czerner .u = { \ 259052c198c6SLukas Czerner .offset = offsetof(struct ext4_super_block, _elname), \ 259152c198c6SLukas Czerner }, \ 259252c198c6SLukas Czerner } 259352c198c6SLukas Czerner 25943197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25953197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 25963197ebdbSTheodore Ts'o 2597857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 25983197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 25993197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 260052c198c6SLukas Czerner 260152c198c6SLukas Czerner #define EXT4_RO_ATTR_ES_UI(name, elname) \ 260252c198c6SLukas Czerner EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname) 26033197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 26043197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 260552c198c6SLukas Czerner 26063197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 2607f2d50a65SJan Kara #define EXT4_DEPRECATED_ATTR(_name, _val) \ 2608f2d50a65SJan Kara static struct ext4_attr ext4_attr_##_name = { \ 2609f2d50a65SJan Kara .attr = {.name = __stringify(_name), .mode = 0444 }, \ 2610f2d50a65SJan Kara .show = sbi_deprecated_show, \ 2611f2d50a65SJan Kara .u = { \ 2612f2d50a65SJan Kara .deprecated_val = _val, \ 2613f2d50a65SJan Kara }, \ 2614f2d50a65SJan Kara } 26153197ebdbSTheodore Ts'o 26163197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 26173197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 26183197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 261927dd4385SLukas Czerner EXT4_RW_ATTR(reserved_clusters); 26203197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 26213197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 262211013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 26233197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 26243197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 26253197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 26263197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26273197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26283197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 2629f2d50a65SJan Kara EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); 263067a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 26312c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 2632efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 2633efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 2634efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 2635efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 2636efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 2637efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 263852c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 263952c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); 264052c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); 26413197ebdbSTheodore Ts'o 26423197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26433197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26443197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26453197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 264627dd4385SLukas Czerner ATTR_LIST(reserved_clusters), 26473197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 264811013911SAndreas Dilger ATTR_LIST(inode_goal), 26493197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26503197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26513197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26523197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26533197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26543197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 265555138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 265667a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 26572c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 2658efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 2659efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_burst), 2660efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 2661efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 2662efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 2663efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 266452c198c6SLukas Czerner ATTR_LIST(errors_count), 266552c198c6SLukas Czerner ATTR_LIST(first_error_time), 266652c198c6SLukas Czerner ATTR_LIST(last_error_time), 26673197ebdbSTheodore Ts'o NULL, 26683197ebdbSTheodore Ts'o }; 26693197ebdbSTheodore Ts'o 2670857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2671857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 267227ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 26735e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2674857ac889SLukas Czerner 2675857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2676857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 267727ee40dfSLukas Czerner ATTR_LIST(batched_discard), 26785e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2679857ac889SLukas Czerner NULL, 2680857ac889SLukas Czerner }; 2681857ac889SLukas Czerner 26823197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 26833197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 26843197ebdbSTheodore Ts'o { 26853197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26863197ebdbSTheodore Ts'o s_kobj); 26873197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26883197ebdbSTheodore Ts'o 26893197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 26903197ebdbSTheodore Ts'o } 26913197ebdbSTheodore Ts'o 26923197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 26933197ebdbSTheodore Ts'o struct attribute *attr, 26943197ebdbSTheodore Ts'o const char *buf, size_t len) 26953197ebdbSTheodore Ts'o { 26963197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26973197ebdbSTheodore Ts'o s_kobj); 26983197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26993197ebdbSTheodore Ts'o 27003197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 27013197ebdbSTheodore Ts'o } 27023197ebdbSTheodore Ts'o 27033197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 27043197ebdbSTheodore Ts'o { 27053197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27063197ebdbSTheodore Ts'o s_kobj); 27073197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 27083197ebdbSTheodore Ts'o } 27093197ebdbSTheodore Ts'o 271052cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 27113197ebdbSTheodore Ts'o .show = ext4_attr_show, 27123197ebdbSTheodore Ts'o .store = ext4_attr_store, 27133197ebdbSTheodore Ts'o }; 27143197ebdbSTheodore Ts'o 27153197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 27163197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 27173197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 27183197ebdbSTheodore Ts'o .release = ext4_sb_release, 27193197ebdbSTheodore Ts'o }; 27203197ebdbSTheodore Ts'o 2721857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2722857ac889SLukas Czerner { 2723857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2724857ac889SLukas Czerner } 2725857ac889SLukas Czerner 2726c7f72543SLukas Czerner static ssize_t ext4_feat_show(struct kobject *kobj, 2727c7f72543SLukas Czerner struct attribute *attr, char *buf) 2728c7f72543SLukas Czerner { 2729c7f72543SLukas Czerner return snprintf(buf, PAGE_SIZE, "supported\n"); 2730c7f72543SLukas Czerner } 2731c7f72543SLukas Czerner 2732c7f72543SLukas Czerner /* 2733c7f72543SLukas Czerner * We can not use ext4_attr_show/store because it relies on the kobject 2734c7f72543SLukas Czerner * being embedded in the ext4_sb_info structure which is definitely not 2735c7f72543SLukas Czerner * true in this case. 2736c7f72543SLukas Czerner */ 2737c7f72543SLukas Czerner static const struct sysfs_ops ext4_feat_ops = { 2738c7f72543SLukas Czerner .show = ext4_feat_show, 2739c7f72543SLukas Czerner .store = NULL, 2740c7f72543SLukas Czerner }; 2741c7f72543SLukas Czerner 2742857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2743857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2744c7f72543SLukas Czerner .sysfs_ops = &ext4_feat_ops, 2745857ac889SLukas Czerner .release = ext4_feat_release, 2746857ac889SLukas Czerner }; 2747857ac889SLukas Czerner 2748a13fb1a4SEric Sandeen /* 2749a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2750a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2751a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2752a13fb1a4SEric Sandeen * 0 if it cannot be. 2753a13fb1a4SEric Sandeen */ 2754a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2755a13fb1a4SEric Sandeen { 2756a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2757a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2758a13fb1a4SEric Sandeen "Couldn't mount because of " 2759a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2760a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2761a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2762a13fb1a4SEric Sandeen return 0; 2763a13fb1a4SEric Sandeen } 2764a13fb1a4SEric Sandeen 2765a13fb1a4SEric Sandeen if (readonly) 2766a13fb1a4SEric Sandeen return 1; 2767a13fb1a4SEric Sandeen 27682cb5cc8bSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_READONLY)) { 27692cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 27702cb5cc8bSDarrick J. Wong sb->s_flags |= MS_RDONLY; 27712cb5cc8bSDarrick J. Wong return 1; 27722cb5cc8bSDarrick J. Wong } 27732cb5cc8bSDarrick J. Wong 2774a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2775a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2776a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2777a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2778a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2779a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2780a13fb1a4SEric Sandeen return 0; 2781a13fb1a4SEric Sandeen } 2782a13fb1a4SEric Sandeen /* 2783a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2784a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2785a13fb1a4SEric Sandeen */ 2786a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2787a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2788a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2789a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2790a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2791a13fb1a4SEric Sandeen return 0; 2792a13fb1a4SEric Sandeen } 2793a13fb1a4SEric Sandeen } 2794bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2795bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2796bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2797bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2798bab08ab9STheodore Ts'o "extents feature\n"); 2799bab08ab9STheodore Ts'o return 0; 2800bab08ab9STheodore Ts'o } 28017c319d32SAditya Kali 28027c319d32SAditya Kali #ifndef CONFIG_QUOTA 28037c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 28047c319d32SAditya Kali !readonly) { 28057c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28067c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28077c319d32SAditya Kali "without CONFIG_QUOTA"); 28087c319d32SAditya Kali return 0; 28097c319d32SAditya Kali } 28107c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2811a13fb1a4SEric Sandeen return 1; 2812a13fb1a4SEric Sandeen } 2813a13fb1a4SEric Sandeen 281466e61a9eSTheodore Ts'o /* 281566e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 281666e61a9eSTheodore Ts'o * on the file system 281766e61a9eSTheodore Ts'o */ 281866e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 281966e61a9eSTheodore Ts'o { 282066e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 282166e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 282266e61a9eSTheodore Ts'o struct ext4_super_block *es; 282366e61a9eSTheodore Ts'o 282466e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 282566e61a9eSTheodore Ts'o es = sbi->s_es; 282666e61a9eSTheodore Ts'o 282766e61a9eSTheodore Ts'o if (es->s_error_count) 2828ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2829ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 283066e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 283166e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2832ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 283366e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 283466e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 283566e61a9eSTheodore Ts'o es->s_first_error_func, 283666e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 283766e61a9eSTheodore Ts'o if (es->s_first_error_ino) 283866e61a9eSTheodore Ts'o printk(": inode %u", 283966e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 284066e61a9eSTheodore Ts'o if (es->s_first_error_block) 284166e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 284266e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 284366e61a9eSTheodore Ts'o printk("\n"); 284466e61a9eSTheodore Ts'o } 284566e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2846ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 284766e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 284866e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 284966e61a9eSTheodore Ts'o es->s_last_error_func, 285066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 285166e61a9eSTheodore Ts'o if (es->s_last_error_ino) 285266e61a9eSTheodore Ts'o printk(": inode %u", 285366e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 285466e61a9eSTheodore Ts'o if (es->s_last_error_block) 285566e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 285666e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 285766e61a9eSTheodore Ts'o printk("\n"); 285866e61a9eSTheodore Ts'o } 285966e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 286066e61a9eSTheodore Ts'o } 286166e61a9eSTheodore Ts'o 2862bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2863bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2864bfff6873SLukas Czerner { 2865bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2866bfff6873SLukas Czerner ext4_group_t group, ngroups; 2867bfff6873SLukas Czerner struct super_block *sb; 2868bfff6873SLukas Czerner unsigned long timeout = 0; 2869bfff6873SLukas Czerner int ret = 0; 2870bfff6873SLukas Czerner 2871bfff6873SLukas Czerner sb = elr->lr_super; 2872bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2873bfff6873SLukas Czerner 28748e8ad8a5SJan Kara sb_start_write(sb); 2875bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2876bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2877bfff6873SLukas Czerner if (!gdp) { 2878bfff6873SLukas Czerner ret = 1; 2879bfff6873SLukas Czerner break; 2880bfff6873SLukas Czerner } 2881bfff6873SLukas Czerner 2882bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2883bfff6873SLukas Czerner break; 2884bfff6873SLukas Czerner } 2885bfff6873SLukas Czerner 28867f511862STheodore Ts'o if (group >= ngroups) 2887bfff6873SLukas Czerner ret = 1; 2888bfff6873SLukas Czerner 2889bfff6873SLukas Czerner if (!ret) { 2890bfff6873SLukas Czerner timeout = jiffies; 2891bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2892bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2893bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 289451ce6511SLukas Czerner timeout = (jiffies - timeout) * 289551ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2896bfff6873SLukas Czerner elr->lr_timeout = timeout; 2897bfff6873SLukas Czerner } 2898bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2899bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2900bfff6873SLukas Czerner } 29018e8ad8a5SJan Kara sb_end_write(sb); 2902bfff6873SLukas Czerner 2903bfff6873SLukas Czerner return ret; 2904bfff6873SLukas Czerner } 2905bfff6873SLukas Czerner 2906bfff6873SLukas Czerner /* 2907bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29084ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2909bfff6873SLukas Czerner */ 2910bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2911bfff6873SLukas Czerner { 2912bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2913bfff6873SLukas Czerner 2914bfff6873SLukas Czerner if (!elr) 2915bfff6873SLukas Czerner return; 2916bfff6873SLukas Czerner 2917bfff6873SLukas Czerner sbi = elr->lr_sbi; 2918bfff6873SLukas Czerner 2919bfff6873SLukas Czerner list_del(&elr->lr_request); 2920bfff6873SLukas Czerner sbi->s_li_request = NULL; 2921bfff6873SLukas Czerner kfree(elr); 2922bfff6873SLukas Czerner } 2923bfff6873SLukas Czerner 2924bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2925bfff6873SLukas Czerner { 29261bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29271bb933fbSLukas Czerner if (!ext4_li_info) { 29281bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2929bfff6873SLukas Czerner return; 29301bb933fbSLukas Czerner } 2931bfff6873SLukas Czerner 2932bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29331bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2934bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29351bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2936bfff6873SLukas Czerner } 2937bfff6873SLukas Czerner 29388f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29398f1f7453SEric Sandeen 2940bfff6873SLukas Czerner /* 2941bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2942bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2943bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2944bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2945bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2946bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2947bfff6873SLukas Czerner * next waking time and put itself into sleep. 2948bfff6873SLukas Czerner */ 2949bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2950bfff6873SLukas Czerner { 2951bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2952bfff6873SLukas Czerner struct list_head *pos, *n; 2953bfff6873SLukas Czerner struct ext4_li_request *elr; 29544ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2955bfff6873SLukas Czerner 2956bfff6873SLukas Czerner BUG_ON(NULL == eli); 2957bfff6873SLukas Czerner 2958bfff6873SLukas Czerner cont_thread: 2959bfff6873SLukas Czerner while (true) { 2960bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2961bfff6873SLukas Czerner 2962bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2963bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2964bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2965bfff6873SLukas Czerner goto exit_thread; 2966bfff6873SLukas Czerner } 2967bfff6873SLukas Czerner 2968bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2969bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2970bfff6873SLukas Czerner lr_request); 2971bfff6873SLukas Czerner 2972b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2973b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2974b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2975bfff6873SLukas Czerner ext4_remove_li_request(elr); 2976bfff6873SLukas Czerner continue; 2977bfff6873SLukas Czerner } 2978b2c78cd0STheodore Ts'o } 2979bfff6873SLukas Czerner 2980bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2981bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2982bfff6873SLukas Czerner } 2983bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2984bfff6873SLukas Czerner 2985a0acae0eSTejun Heo try_to_freeze(); 2986bfff6873SLukas Czerner 29874ed5c033SLukas Czerner cur = jiffies; 29884ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2989f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2990bfff6873SLukas Czerner cond_resched(); 2991bfff6873SLukas Czerner continue; 2992bfff6873SLukas Czerner } 2993bfff6873SLukas Czerner 29944ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 29954ed5c033SLukas Czerner 29968f1f7453SEric Sandeen if (kthread_should_stop()) { 29978f1f7453SEric Sandeen ext4_clear_request_list(); 29988f1f7453SEric Sandeen goto exit_thread; 29998f1f7453SEric Sandeen } 3000bfff6873SLukas Czerner } 3001bfff6873SLukas Czerner 3002bfff6873SLukas Czerner exit_thread: 3003bfff6873SLukas Czerner /* 3004bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3005bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3006bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3007bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3008bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3009bfff6873SLukas Czerner * new one. 3010bfff6873SLukas Czerner */ 3011bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3012bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3013bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3014bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3015bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3016bfff6873SLukas Czerner goto cont_thread; 3017bfff6873SLukas Czerner } 3018bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3019bfff6873SLukas Czerner kfree(ext4_li_info); 3020bfff6873SLukas Czerner ext4_li_info = NULL; 3021bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3022bfff6873SLukas Czerner 3023bfff6873SLukas Czerner return 0; 3024bfff6873SLukas Czerner } 3025bfff6873SLukas Czerner 3026bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3027bfff6873SLukas Czerner { 3028bfff6873SLukas Czerner struct list_head *pos, *n; 3029bfff6873SLukas Czerner struct ext4_li_request *elr; 3030bfff6873SLukas Czerner 3031bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3032bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3033bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3034bfff6873SLukas Czerner lr_request); 3035bfff6873SLukas Czerner ext4_remove_li_request(elr); 3036bfff6873SLukas Czerner } 3037bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3038bfff6873SLukas Czerner } 3039bfff6873SLukas Czerner 3040bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3041bfff6873SLukas Czerner { 30428f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30438f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30448f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30458f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3046bfff6873SLukas Czerner ext4_clear_request_list(); 3047bfff6873SLukas Czerner kfree(ext4_li_info); 3048bfff6873SLukas Czerner ext4_li_info = NULL; 304992b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3050bfff6873SLukas Czerner "initialization thread\n", 3051bfff6873SLukas Czerner err); 3052bfff6873SLukas Czerner return err; 3053bfff6873SLukas Czerner } 3054bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3055bfff6873SLukas Czerner return 0; 3056bfff6873SLukas Czerner } 3057bfff6873SLukas Czerner 3058bfff6873SLukas Czerner /* 3059bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3060bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3061bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3062bfff6873SLukas Czerner * groups and return total number of groups. 3063bfff6873SLukas Czerner */ 3064bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3065bfff6873SLukas Czerner { 3066bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3067bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3068bfff6873SLukas Czerner 3069bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3070bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3071bfff6873SLukas Czerner if (!gdp) 3072bfff6873SLukas Czerner continue; 3073bfff6873SLukas Czerner 3074bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3075bfff6873SLukas Czerner break; 3076bfff6873SLukas Czerner } 3077bfff6873SLukas Czerner 3078bfff6873SLukas Czerner return group; 3079bfff6873SLukas Czerner } 3080bfff6873SLukas Czerner 3081bfff6873SLukas Czerner static int ext4_li_info_new(void) 3082bfff6873SLukas Czerner { 3083bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3084bfff6873SLukas Czerner 3085bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3086bfff6873SLukas Czerner if (!eli) 3087bfff6873SLukas Czerner return -ENOMEM; 3088bfff6873SLukas Czerner 3089bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3090bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3091bfff6873SLukas Czerner 3092bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3093bfff6873SLukas Czerner 3094bfff6873SLukas Czerner ext4_li_info = eli; 3095bfff6873SLukas Czerner 3096bfff6873SLukas Czerner return 0; 3097bfff6873SLukas Czerner } 3098bfff6873SLukas Czerner 3099bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3100bfff6873SLukas Czerner ext4_group_t start) 3101bfff6873SLukas Czerner { 3102bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3103bfff6873SLukas Czerner struct ext4_li_request *elr; 3104bfff6873SLukas Czerner 3105bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3106bfff6873SLukas Czerner if (!elr) 3107bfff6873SLukas Czerner return NULL; 3108bfff6873SLukas Czerner 3109bfff6873SLukas Czerner elr->lr_super = sb; 3110bfff6873SLukas Czerner elr->lr_sbi = sbi; 3111bfff6873SLukas Czerner elr->lr_next_group = start; 3112bfff6873SLukas Czerner 3113bfff6873SLukas Czerner /* 3114bfff6873SLukas Czerner * Randomize first schedule time of the request to 3115bfff6873SLukas Czerner * spread the inode table initialization requests 3116bfff6873SLukas Czerner * better. 3117bfff6873SLukas Czerner */ 3118dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3119dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3120bfff6873SLukas Czerner return elr; 3121bfff6873SLukas Czerner } 3122bfff6873SLukas Czerner 31237f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3124bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3125bfff6873SLukas Czerner { 3126bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31277f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3128bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 31296c5a6cb9SAndrew Morton int ret = 0; 3130bfff6873SLukas Czerner 31317f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 313251ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 313351ce6511SLukas Czerner /* 313451ce6511SLukas Czerner * Reset timeout so it can be computed again, because 313551ce6511SLukas Czerner * s_li_wait_mult might have changed. 313651ce6511SLukas Czerner */ 313751ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31387f511862STheodore Ts'o goto out; 313951ce6511SLukas Czerner } 3140bfff6873SLukas Czerner 3141bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3142bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 314355ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31447f511862STheodore Ts'o goto out; 3145bfff6873SLukas Czerner 3146bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31477f511862STheodore Ts'o if (!elr) { 31487f511862STheodore Ts'o ret = -ENOMEM; 31497f511862STheodore Ts'o goto out; 31507f511862STheodore Ts'o } 3151bfff6873SLukas Czerner 3152bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3153bfff6873SLukas Czerner ret = ext4_li_info_new(); 3154bfff6873SLukas Czerner if (ret) 3155bfff6873SLukas Czerner goto out; 3156bfff6873SLukas Czerner } 3157bfff6873SLukas Czerner 3158bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3159bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3160bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3161bfff6873SLukas Czerner 3162bfff6873SLukas Czerner sbi->s_li_request = elr; 316346e4690bSTao Ma /* 316446e4690bSTao Ma * set elr to NULL here since it has been inserted to 316546e4690bSTao Ma * the request_list and the removal and free of it is 316646e4690bSTao Ma * handled by ext4_clear_request_list from now on. 316746e4690bSTao Ma */ 316846e4690bSTao Ma elr = NULL; 3169bfff6873SLukas Czerner 3170bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3171bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3172bfff6873SLukas Czerner if (ret) 3173bfff6873SLukas Czerner goto out; 3174bfff6873SLukas Czerner } 3175bfff6873SLukas Czerner out: 3176bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3177beed5ecbSNicolas Kaiser if (ret) 3178bfff6873SLukas Czerner kfree(elr); 3179bfff6873SLukas Czerner return ret; 3180bfff6873SLukas Czerner } 3181bfff6873SLukas Czerner 3182bfff6873SLukas Czerner /* 3183bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3184bfff6873SLukas Czerner * module unload. 3185bfff6873SLukas Czerner */ 3186bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3187bfff6873SLukas Czerner { 3188bfff6873SLukas Czerner /* 3189bfff6873SLukas Czerner * If thread exited earlier 3190bfff6873SLukas Czerner * there's nothing to be done. 3191bfff6873SLukas Czerner */ 31928f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3193bfff6873SLukas Czerner return; 3194bfff6873SLukas Czerner 31958f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3196bfff6873SLukas Czerner } 3197bfff6873SLukas Czerner 319825ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 319925ed6e8aSDarrick J. Wong { 320025ed6e8aSDarrick J. Wong int ret = 1; 320125ed6e8aSDarrick J. Wong int compat, incompat; 320225ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 320325ed6e8aSDarrick J. Wong 32049aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3205db9ee220SDarrick J. Wong /* journal checksum v3 */ 320625ed6e8aSDarrick J. Wong compat = 0; 3207db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 320825ed6e8aSDarrick J. Wong } else { 320925ed6e8aSDarrick J. Wong /* journal checksum v1 */ 321025ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 321125ed6e8aSDarrick J. Wong incompat = 0; 321225ed6e8aSDarrick J. Wong } 321325ed6e8aSDarrick J. Wong 3214feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3215feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3216feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3217feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 321825ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 321925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 322025ed6e8aSDarrick J. Wong compat, 0, 322125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 322225ed6e8aSDarrick J. Wong incompat); 322325ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 322425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 322525ed6e8aSDarrick J. Wong compat, 0, 322625ed6e8aSDarrick J. Wong incompat); 322725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 322825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 322925ed6e8aSDarrick J. Wong } else { 3230feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3231feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 323225ed6e8aSDarrick J. Wong } 323325ed6e8aSDarrick J. Wong 323425ed6e8aSDarrick J. Wong return ret; 323525ed6e8aSDarrick J. Wong } 323625ed6e8aSDarrick J. Wong 3237952fc18eSTheodore Ts'o /* 3238952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3239952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3240952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3241952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3242952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3243952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3244952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3245952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3246952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3247952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3248952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3249952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3250952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3251952fc18eSTheodore Ts'o */ 3252952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3253952fc18eSTheodore Ts'o char *buf) 3254952fc18eSTheodore Ts'o { 3255952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3256952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3257952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3258952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3259952fc18eSTheodore Ts'o int s, j, count = 0; 3260952fc18eSTheodore Ts'o 32610548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 32620548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32630548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32640548bbb8STheodore Ts'o 3265952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3266952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3267952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3268952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3269952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3270952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3271952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3272952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3273952fc18eSTheodore Ts'o count++; 3274952fc18eSTheodore Ts'o } 3275952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3276952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3277952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3278952fc18eSTheodore Ts'o count++; 3279952fc18eSTheodore Ts'o } 3280952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3281952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3282952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3283952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3284952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3285952fc18eSTheodore Ts'o count++; 3286952fc18eSTheodore Ts'o } 3287952fc18eSTheodore Ts'o if (i != grp) 3288952fc18eSTheodore Ts'o continue; 3289952fc18eSTheodore Ts'o s = 0; 3290952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3291952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3292952fc18eSTheodore Ts'o count++; 3293952fc18eSTheodore Ts'o } 3294952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3295952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3296952fc18eSTheodore Ts'o count++; 3297952fc18eSTheodore Ts'o } 3298952fc18eSTheodore Ts'o } 3299952fc18eSTheodore Ts'o if (!count) 3300952fc18eSTheodore Ts'o return 0; 3301952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3302952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3303952fc18eSTheodore Ts'o } 3304952fc18eSTheodore Ts'o 3305952fc18eSTheodore Ts'o /* 3306952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3307952fc18eSTheodore Ts'o */ 3308952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3309952fc18eSTheodore Ts'o { 3310952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3311952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3312952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3313952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 33144fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3315952fc18eSTheodore Ts'o 3316952fc18eSTheodore Ts'o if (!buf) 3317952fc18eSTheodore Ts'o return -ENOMEM; 3318952fc18eSTheodore Ts'o 3319952fc18eSTheodore Ts'o /* 3320952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3321952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3322952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3323952fc18eSTheodore Ts'o */ 3324952fc18eSTheodore Ts'o 3325952fc18eSTheodore Ts'o /* 3326952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3327952fc18eSTheodore Ts'o */ 3328952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3329952fc18eSTheodore Ts'o 3330952fc18eSTheodore Ts'o /* 3331952fc18eSTheodore Ts'o * Add the overhead found in each block group 3332952fc18eSTheodore Ts'o */ 3333952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3334952fc18eSTheodore Ts'o int blks; 3335952fc18eSTheodore Ts'o 3336952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3337952fc18eSTheodore Ts'o overhead += blks; 3338952fc18eSTheodore Ts'o if (blks) 3339952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3340952fc18eSTheodore Ts'o cond_resched(); 3341952fc18eSTheodore Ts'o } 3342b003b524SEric Sandeen /* Add the internal journal blocks as well */ 3343b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3344810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33450875a2b4SEric Sandeen 3346952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3347952fc18eSTheodore Ts'o smp_wmb(); 3348952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3349952fc18eSTheodore Ts'o return 0; 3350952fc18eSTheodore Ts'o } 3351952fc18eSTheodore Ts'o 335227dd4385SLukas Czerner 335330fac0f7SJan Kara static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) 335427dd4385SLukas Czerner { 335527dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 335627dd4385SLukas Czerner 335727dd4385SLukas Czerner /* 335830fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 335930fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 336030fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 336130fac0f7SJan Kara * to keep ext2/3 backward compatibility. 336230fac0f7SJan Kara */ 336330fac0f7SJan Kara if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 336430fac0f7SJan Kara return 0; 336530fac0f7SJan Kara /* 336627dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 336727dd4385SLukas Czerner * This should cover the situations where we can not afford to run 336827dd4385SLukas Czerner * out of space like for example punch hole, or converting 3369556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 337027dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 337127dd4385SLukas Czerner * very rare. 337227dd4385SLukas Czerner */ 337330fac0f7SJan Kara resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> 337430fac0f7SJan Kara EXT4_SB(sb)->s_cluster_bits; 337527dd4385SLukas Czerner 337627dd4385SLukas Czerner do_div(resv_clusters, 50); 337727dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 337827dd4385SLukas Czerner 337927dd4385SLukas Czerner return resv_clusters; 338027dd4385SLukas Czerner } 338127dd4385SLukas Czerner 338227dd4385SLukas Czerner 338327dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) 338427dd4385SLukas Czerner { 338527dd4385SLukas Czerner ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> 338627dd4385SLukas Czerner sbi->s_cluster_bits; 338727dd4385SLukas Czerner 338827dd4385SLukas Czerner if (count >= clusters) 338927dd4385SLukas Czerner return -EINVAL; 339027dd4385SLukas Czerner 339127dd4385SLukas Czerner atomic64_set(&sbi->s_resv_clusters, count); 339227dd4385SLukas Czerner return 0; 339327dd4385SLukas Czerner } 339427dd4385SLukas Czerner 3395617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3396ac27a0ecSDave Kleikamp { 3397d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3398ac27a0ecSDave Kleikamp struct buffer_head *bh; 3399617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3400617ba13bSMingming Cao struct ext4_sb_info *sbi; 3401617ba13bSMingming Cao ext4_fsblk_t block; 3402617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 340370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3404ac27a0ecSDave Kleikamp unsigned long offset = 0; 3405ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3406ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3407ac27a0ecSDave Kleikamp struct inode *root; 34089f6200bbSTheodore Ts'o char *cp; 34090390131bSFrank Mayhar const char *descr; 3410dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3411281b5995STheodore Ts'o int blocksize, clustersize; 34124ec11028STheodore Ts'o unsigned int db_count; 34134ec11028STheodore Ts'o unsigned int i; 3414281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3415bd81d8eeSLaurent Vivier __u64 blocks_count; 341607aa2ea1SLukas Czerner int err = 0; 3417b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3418bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3419ac27a0ecSDave Kleikamp 3420ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3421ac27a0ecSDave Kleikamp if (!sbi) 3422dcc7dae3SCyrill Gorcunov goto out_free_orig; 3423705895b6SPekka Enberg 3424705895b6SPekka Enberg sbi->s_blockgroup_lock = 3425705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3426705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3427705895b6SPekka Enberg kfree(sbi); 3428dcc7dae3SCyrill Gorcunov goto out_free_orig; 3429705895b6SPekka Enberg } 3430ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34312c0544b2STheodore Ts'o sbi->s_sb = sb; 3432240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3433d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3434f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3435f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3436f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3437*b30ab0e0SMichael Halcrow #ifdef CONFIG_EXT4_FS_ENCRYPTION 3438*b30ab0e0SMichael Halcrow /* Modes of operations for file and directory encryption. */ 3439*b30ab0e0SMichael Halcrow sbi->s_file_encryption_mode = EXT4_ENCRYPTION_MODE_AES_256_XTS; 3440*b30ab0e0SMichael Halcrow sbi->s_dir_encryption_mode = EXT4_ENCRYPTION_MODE_INVALID; 3441*b30ab0e0SMichael Halcrow #endif 3442ac27a0ecSDave Kleikamp 34439f6200bbSTheodore Ts'o /* Cleanup superblock name */ 34449f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 34459f6200bbSTheodore Ts'o *cp = '!'; 34469f6200bbSTheodore Ts'o 344707aa2ea1SLukas Czerner /* -EINVAL is default */ 3448dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3449617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3450ac27a0ecSDave Kleikamp if (!blocksize) { 3451b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3452ac27a0ecSDave Kleikamp goto out_fail; 3453ac27a0ecSDave Kleikamp } 3454ac27a0ecSDave Kleikamp 3455ac27a0ecSDave Kleikamp /* 3456617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3457ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3458ac27a0ecSDave Kleikamp */ 3459617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 346070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 346170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3462ac27a0ecSDave Kleikamp } else { 346370bbb3e0SAndrew Morton logical_sb_block = sb_block; 3464ac27a0ecSDave Kleikamp } 3465ac27a0ecSDave Kleikamp 3466a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3467b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3468ac27a0ecSDave Kleikamp goto out_fail; 3469ac27a0ecSDave Kleikamp } 3470ac27a0ecSDave Kleikamp /* 3471ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3472617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3473ac27a0ecSDave Kleikamp */ 34742716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3475ac27a0ecSDave Kleikamp sbi->s_es = es; 3476ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3477617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3478617ba13bSMingming Cao goto cantfind_ext4; 3479afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3480ac27a0ecSDave Kleikamp 3481feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3482feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3483feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3484feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3485363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3486feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3487feb0ab32SDarrick J. Wong 3488d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3489d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3490d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3491d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3492d25425f8SDarrick J. Wong silent = 1; 3493d25425f8SDarrick J. Wong goto cantfind_ext4; 3494d25425f8SDarrick J. Wong } 3495d25425f8SDarrick J. Wong 34960441984aSDarrick J. Wong /* Load the checksum driver */ 34970441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 34980441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 34990441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 35000441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 35010441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 35020441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 35030441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 35040441984aSDarrick J. Wong goto failed_mount; 35050441984aSDarrick J. Wong } 35060441984aSDarrick J. Wong } 35070441984aSDarrick J. Wong 3508a9c47317SDarrick J. Wong /* Check superblock checksum */ 3509a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3510a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3511a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3512a9c47317SDarrick J. Wong silent = 1; 3513a9c47317SDarrick J. Wong goto cantfind_ext4; 3514a9c47317SDarrick J. Wong } 3515a9c47317SDarrick J. Wong 3516a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 35179aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) 3518a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3519a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3520a9c47317SDarrick J. Wong 3521ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3522ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3523fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3524617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3525fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 352687f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3527fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3528617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3529fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3530ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3531fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 353203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3533fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35342e7842b8SHugh Dickins #endif 353598c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 353698c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 353798c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 353898c1a759SDarrick J. Wong 3539617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3540fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3541617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3542fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3543617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3544fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3545ac27a0ecSDave Kleikamp 3546617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3547fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3548bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3549fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3550bb4f397aSAneesh Kumar K.V else 3551fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 355245f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3553fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35548b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3555fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3556ac27a0ecSDave Kleikamp 355708cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 355808cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 355930773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 356030773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 356130773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3562ac27a0ecSDave Kleikamp 35638b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3564fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3565ac27a0ecSDave Kleikamp 35661e2462f9SMingming Cao /* 3567dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3568dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3569dd919b98SAneesh Kumar K.V */ 3570bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35718b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3572fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3573dd919b98SAneesh Kumar K.V 357451ce6511SLukas Czerner /* 357551ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 357651ce6511SLukas Czerner * no mount option specified. 357751ce6511SLukas Czerner */ 357851ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 357951ce6511SLukas Czerner 35808b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3581661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 35828b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35838b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35848b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 35858b67f04aSTheodore Ts'o } 35865a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3587b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3588661aa520SEric Sandeen &journal_ioprio, 0)) 3589ac27a0ecSDave Kleikamp goto failed_mount; 3590ac27a0ecSDave Kleikamp 359156889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 359256889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 359356889787STheodore Ts'o "with data=journal disables delayed " 359456889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 359556889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 359656889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 359756889787STheodore Ts'o "both data=journal and delalloc"); 359856889787STheodore Ts'o goto failed_mount; 359956889787STheodore Ts'o } 360056889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 360156889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 36026ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 360356889787STheodore Ts'o goto failed_mount; 360456889787STheodore Ts'o } 3605923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3606923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3607923ae0ffSRoss Zwisler "both data=journal and dax"); 3608923ae0ffSRoss Zwisler goto failed_mount; 3609923ae0ffSRoss Zwisler } 361056889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 361156889787STheodore Ts'o clear_opt(sb, DELALLOC); 361256889787STheodore Ts'o } 361356889787STheodore Ts'o 3614ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3615482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3616ac27a0ecSDave Kleikamp 3617617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3618617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3619617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3620617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3621b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3622b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3623b31e1552SEric Sandeen "running e2fsck is recommended"); 3624469108ffSTheodore Tso 3625ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3626ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3627ed3654ebSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, 3628ed3654ebSTheodore Ts'o EXT4_FEATURE_INCOMPAT_64BIT)) { 3629ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3630ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3631ed3654ebSTheodore Ts'o goto failed_mount; 3632ed3654ebSTheodore Ts'o } 3633ed3654ebSTheodore Ts'o } 3634ed3654ebSTheodore Ts'o 36352035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36362035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36372035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36382035e776STheodore Ts'o "using the ext4 subsystem"); 36392035e776STheodore Ts'o else { 36402035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36412035e776STheodore Ts'o "to feature incompatibilities"); 36422035e776STheodore Ts'o goto failed_mount; 36432035e776STheodore Ts'o } 36442035e776STheodore Ts'o } 36452035e776STheodore Ts'o 36462035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36472035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36482035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36492035e776STheodore Ts'o "using the ext4 subsystem"); 36502035e776STheodore Ts'o else { 36512035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36522035e776STheodore Ts'o "to feature incompatibilities"); 36532035e776STheodore Ts'o goto failed_mount; 36542035e776STheodore Ts'o } 36552035e776STheodore Ts'o } 36562035e776STheodore Ts'o 3657469108ffSTheodore Tso /* 3658ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3659ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3660ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3661ac27a0ecSDave Kleikamp */ 3662a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3663ac27a0ecSDave Kleikamp goto failed_mount; 3664a13fb1a4SEric Sandeen 3665261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3666617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3667617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3668b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3669b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3670ac27a0ecSDave Kleikamp goto failed_mount; 3671ac27a0ecSDave Kleikamp } 3672ac27a0ecSDave Kleikamp 3673923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 3674923ae0ffSRoss Zwisler if (blocksize != PAGE_SIZE) { 3675923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, 3676923ae0ffSRoss Zwisler "error: unsupported blocksize for dax"); 3677923ae0ffSRoss Zwisler goto failed_mount; 3678923ae0ffSRoss Zwisler } 3679923ae0ffSRoss Zwisler if (!sb->s_bdev->bd_disk->fops->direct_access) { 3680923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, 3681923ae0ffSRoss Zwisler "error: device does not support dax"); 3682923ae0ffSRoss Zwisler goto failed_mount; 3683923ae0ffSRoss Zwisler } 3684923ae0ffSRoss Zwisler } 3685923ae0ffSRoss Zwisler 3686ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3687ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3688ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3689b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3690ce40733cSAneesh Kumar K.V blocksize); 3691ac27a0ecSDave Kleikamp goto failed_mount; 3692ac27a0ecSDave Kleikamp } 3693ac27a0ecSDave Kleikamp 3694ac27a0ecSDave Kleikamp brelse(bh); 369570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 369670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3697a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3698ac27a0ecSDave Kleikamp if (!bh) { 3699b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3700b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3701ac27a0ecSDave Kleikamp goto failed_mount; 3702ac27a0ecSDave Kleikamp } 37032716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3704ac27a0ecSDave Kleikamp sbi->s_es = es; 3705617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3706b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3707b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3708ac27a0ecSDave Kleikamp goto failed_mount; 3709ac27a0ecSDave Kleikamp } 3710ac27a0ecSDave Kleikamp } 3711ac27a0ecSDave Kleikamp 3712a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3713a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3714f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3715f287a1a5STheodore Ts'o has_huge_files); 3716f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3717ac27a0ecSDave Kleikamp 3718617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3719617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3720617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3721ac27a0ecSDave Kleikamp } else { 3722ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3723ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3724617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 37251330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3726ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3727b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3728b31e1552SEric Sandeen "unsupported inode size: %d", 3729ac27a0ecSDave Kleikamp sbi->s_inode_size); 3730ac27a0ecSDave Kleikamp goto failed_mount; 3731ac27a0ecSDave Kleikamp } 3732ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3733ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3734ac27a0ecSDave Kleikamp } 37350b8e58a1SAndreas Dilger 37360d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 37370d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 37388fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 37390d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3740d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3741b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3742b31e1552SEric Sandeen "unsupported descriptor size %lu", 37430d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37440d1ee42fSAlexandre Ratchov goto failed_mount; 37450d1ee42fSAlexandre Ratchov } 37460d1ee42fSAlexandre Ratchov } else 37470d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37480b8e58a1SAndreas Dilger 3749ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3750ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3751b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3752617ba13bSMingming Cao goto cantfind_ext4; 37530b8e58a1SAndreas Dilger 3754617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3755ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3756617ba13bSMingming Cao goto cantfind_ext4; 3757ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3758ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37590d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3760ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3761ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3762e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3763e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37640b8e58a1SAndreas Dilger 3765ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3766ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3767ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 376823301410STheodore Ts'o if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { 3769f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3770f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3771f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3772f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3773f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 377423301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 377523301410STheodore Ts'o es->s_flags |= 377623301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3777f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3778f99b2589STheodore Ts'o #else 377923301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 378023301410STheodore Ts'o es->s_flags |= 378123301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3782f99b2589STheodore Ts'o #endif 3783f99b2589STheodore Ts'o } 378423301410STheodore Ts'o } 3785ac27a0ecSDave Kleikamp 3786281b5995STheodore Ts'o /* Handle clustersize */ 3787281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3788281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3789281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3790281b5995STheodore Ts'o if (has_bigalloc) { 3791281b5995STheodore Ts'o if (clustersize < blocksize) { 3792281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3793281b5995STheodore Ts'o "cluster size (%d) smaller than " 3794281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3795281b5995STheodore Ts'o goto failed_mount; 3796281b5995STheodore Ts'o } 3797281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3798281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3799281b5995STheodore Ts'o sbi->s_clusters_per_group = 3800281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3801281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3802281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3803281b5995STheodore Ts'o "#clusters per group too big: %lu", 3804281b5995STheodore Ts'o sbi->s_clusters_per_group); 3805281b5995STheodore Ts'o goto failed_mount; 3806281b5995STheodore Ts'o } 3807281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3808281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3809281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3810281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3811281b5995STheodore Ts'o sbi->s_blocks_per_group, 3812281b5995STheodore Ts'o sbi->s_clusters_per_group); 3813281b5995STheodore Ts'o goto failed_mount; 3814281b5995STheodore Ts'o } 3815281b5995STheodore Ts'o } else { 3816281b5995STheodore Ts'o if (clustersize != blocksize) { 3817281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3818281b5995STheodore Ts'o "block size (%d)", clustersize, 3819281b5995STheodore Ts'o blocksize); 3820281b5995STheodore Ts'o clustersize = blocksize; 3821281b5995STheodore Ts'o } 3822ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3823b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3824b31e1552SEric Sandeen "#blocks per group too big: %lu", 3825ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3826ac27a0ecSDave Kleikamp goto failed_mount; 3827ac27a0ecSDave Kleikamp } 3828281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3829281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3830281b5995STheodore Ts'o } 3831281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3832281b5995STheodore Ts'o 3833ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3834b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3835b31e1552SEric Sandeen "#inodes per group too big: %lu", 3836ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3837ac27a0ecSDave Kleikamp goto failed_mount; 3838ac27a0ecSDave Kleikamp } 3839ac27a0ecSDave Kleikamp 3840960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3841960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3842960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3843960fd856STheodore Ts'o 3844bf43d84bSEric Sandeen /* 3845bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3846bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3847bf43d84bSEric Sandeen */ 38485a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 384930ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38505a9ae68aSDarrick J. Wong if (err) { 3851b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3852bf43d84bSEric Sandeen " too large to mount safely on this system"); 3853ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 385490c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3855ac27a0ecSDave Kleikamp goto failed_mount; 3856ac27a0ecSDave Kleikamp } 3857ac27a0ecSDave Kleikamp 3858617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3859617ba13bSMingming Cao goto cantfind_ext4; 3860e7c95593SEric Sandeen 38610f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38620f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38630f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3864b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3865b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38660f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38670f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38680f2ddca6SFrom: Thiemo Nagel } 38690f2ddca6SFrom: Thiemo Nagel 38704ec11028STheodore Ts'o /* 38714ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38724ec11028STheodore Ts'o * of the filesystem. 38734ec11028STheodore Ts'o */ 38744ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3875b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3876b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3877e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38784ec11028STheodore Ts'o ext4_blocks_count(es)); 3879e7c95593SEric Sandeen goto failed_mount; 3880e7c95593SEric Sandeen } 3881bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3882bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3883bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3884bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 38854ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3886b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 38874ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3888b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 38894ec11028STheodore Ts'o ext4_blocks_count(es), 38904ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 38914ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 38924ec11028STheodore Ts'o goto failed_mount; 38934ec11028STheodore Ts'o } 3894bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3895fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3896fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3897617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3898617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3899f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3900f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3901ac27a0ecSDave Kleikamp GFP_KERNEL); 3902ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3903b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 39042cde417dSTheodore Ts'o ret = -ENOMEM; 3905ac27a0ecSDave Kleikamp goto failed_mount; 3906ac27a0ecSDave Kleikamp } 3907ac27a0ecSDave Kleikamp 39089f6200bbSTheodore Ts'o if (ext4_proc_root) 39099f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3910240799cdSTheodore Ts'o 391166acdcf4STheodore Ts'o if (sbi->s_proc) 391266acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 391366acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 391466acdcf4STheodore Ts'o 3915705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3916ac27a0ecSDave Kleikamp 3917ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 391870bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3919a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3920ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3921b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3922b31e1552SEric Sandeen "can't read group descriptor %d", i); 3923ac27a0ecSDave Kleikamp db_count = i; 3924ac27a0ecSDave Kleikamp goto failed_mount2; 3925ac27a0ecSDave Kleikamp } 3926ac27a0ecSDave Kleikamp } 3927bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3928b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3929f9ae9cf5STheodore Ts'o goto failed_mount2; 3930ac27a0ecSDave Kleikamp } 3931772cb7c8SJose R. Santos 3932f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3933ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3934ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3935ac27a0ecSDave Kleikamp 393604ecddb7SJan Mrazek setup_timer(&sbi->s_err_report, print_daily_error_info, 393704ecddb7SJan Mrazek (unsigned long) sb); 393804496411STao Ma 3939a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3940eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3941ce7e010aSTheodore Ts'o goto failed_mount3; 3942ce7e010aSTheodore Ts'o 3943c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 394467a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3945c9de560dSAlex Tomas 3946f9ae9cf5STheodore Ts'o /* 3947f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3948f9ae9cf5STheodore Ts'o */ 3949f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3950617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3951617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3952ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3953617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3954262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 39551fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 3956262b4662SJan Kara else 3957262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 395896c7e0d9SJan Kara sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 3959ac27a0ecSDave Kleikamp #endif 3960f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3961f2fa2ffcSAneesh Kumar K.V 3962ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39633b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3964ac27a0ecSDave Kleikamp 3965ac27a0ecSDave Kleikamp sb->s_root = NULL; 3966ac27a0ecSDave Kleikamp 3967ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3968617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3969617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3970ac27a0ecSDave Kleikamp 3971c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3972c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3973c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 397450460fe8SDarrick J. Wong goto failed_mount3a; 3975c5e06d10SJohann Lombardi 3976ac27a0ecSDave Kleikamp /* 3977ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3978ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3979ac27a0ecSDave Kleikamp */ 3980ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3981617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3982617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 398350460fe8SDarrick J. Wong goto failed_mount3a; 39840390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 39850390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3986b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3987b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3988744692dcSJiaying Zhang goto failed_mount_wq; 3989ac27a0ecSDave Kleikamp } else { 3990fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 39910390131bSFrank Mayhar sbi->s_journal = NULL; 39920390131bSFrank Mayhar needs_recovery = 0; 39930390131bSFrank Mayhar goto no_journal; 3994ac27a0ecSDave Kleikamp } 3995ac27a0ecSDave Kleikamp 3996f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3997eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3998eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3999b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4000744692dcSJiaying Zhang goto failed_mount_wq; 4001eb40a09cSJose R. Santos } 4002eb40a09cSJose R. Santos 400325ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 400425ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 400525ed6e8aSDarrick J. Wong "feature set"); 400625ed6e8aSDarrick J. Wong goto failed_mount_wq; 4007d4da6c9cSLinus Torvalds } 4008818d276cSGirish Shilamkar 4009ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4010ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4011ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4012ac27a0ecSDave Kleikamp case 0: 4013ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 401463f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 401563f57933SAndrew Morton * cope, else JOURNAL_DATA 401663f57933SAndrew Morton */ 4017dab291afSMingming Cao if (jbd2_journal_check_available_features 4018dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 4019fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4020ac27a0ecSDave Kleikamp else 4021fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4022ac27a0ecSDave Kleikamp break; 4023ac27a0ecSDave Kleikamp 4024617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4025617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4026dab291afSMingming Cao if (!jbd2_journal_check_available_features 4027dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4028b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4029b31e1552SEric Sandeen "requested data journaling mode"); 4030744692dcSJiaying Zhang goto failed_mount_wq; 4031ac27a0ecSDave Kleikamp } 4032ac27a0ecSDave Kleikamp default: 4033ac27a0ecSDave Kleikamp break; 4034ac27a0ecSDave Kleikamp } 4035b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4036ac27a0ecSDave Kleikamp 403718aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 403818aadd47SBobi Jam 4039ce7e010aSTheodore Ts'o no_journal: 40409c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 40419c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 40429c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40439c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40449c191f70ST Makphaibulchoke goto failed_mount_wq; 40459c191f70ST Makphaibulchoke } 40469c191f70ST Makphaibulchoke } 40479c191f70ST Makphaibulchoke 4048fd89d5f2STejun Heo /* 4049952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4050952fc18eSTheodore Ts'o * superblock if present. 4051952fc18eSTheodore Ts'o */ 4052952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4053952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4054952fc18eSTheodore Ts'o else { 405507aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 405607aa2ea1SLukas Czerner if (err) 4057952fc18eSTheodore Ts'o goto failed_mount_wq; 4058952fc18eSTheodore Ts'o } 4059952fc18eSTheodore Ts'o 4060952fc18eSTheodore Ts'o /* 4061fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4062fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4063fd89d5f2STejun Heo */ 40642e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40652e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40662e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40672e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 406807aa2ea1SLukas Czerner ret = -ENOMEM; 40692e8fa54eSJan Kara goto failed_mount4; 40702e8fa54eSJan Kara } 40712e8fa54eSJan Kara 4072ac27a0ecSDave Kleikamp /* 4073dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4074ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4075ac27a0ecSDave Kleikamp */ 4076ac27a0ecSDave Kleikamp 40771d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 40781d1fe1eeSDavid Howells if (IS_ERR(root)) { 4079b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 40801d1fe1eeSDavid Howells ret = PTR_ERR(root); 408132a9bb57SManish Katiyar root = NULL; 4082ac27a0ecSDave Kleikamp goto failed_mount4; 4083ac27a0ecSDave Kleikamp } 4084ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4085b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 408694bf608aSAl Viro iput(root); 4087ac27a0ecSDave Kleikamp goto failed_mount4; 4088ac27a0ecSDave Kleikamp } 408948fde701SAl Viro sb->s_root = d_make_root(root); 40901d1fe1eeSDavid Howells if (!sb->s_root) { 4091b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 40921d1fe1eeSDavid Howells ret = -ENOMEM; 40931d1fe1eeSDavid Howells goto failed_mount4; 40941d1fe1eeSDavid Howells } 4095ac27a0ecSDave Kleikamp 40967e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 40977e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4098ef7f3835SKalpak Shah 4099ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4100ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 4101ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4102ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4103ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 4104ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 4105ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4106ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4107ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4108ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4109ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4110ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4111ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4112ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4113ef7f3835SKalpak Shah } 4114ef7f3835SKalpak Shah } 4115ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4116ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4117ef7f3835SKalpak Shah sbi->s_inode_size) { 4118ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4119ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4120b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4121b31e1552SEric Sandeen "available"); 4122ef7f3835SKalpak Shah } 4123ef7f3835SKalpak Shah 412430fac0f7SJan Kara err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); 412527dd4385SLukas Czerner if (err) { 412627dd4385SLukas Czerner ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " 412730fac0f7SJan Kara "reserved pool", ext4_calculate_resv_clusters(sb)); 4128f9ae9cf5STheodore Ts'o goto failed_mount4a; 412927dd4385SLukas Czerner } 413027dd4385SLukas Czerner 41316fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 41326fd058f7STheodore Ts'o if (err) { 4133b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4134fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4135f9ae9cf5STheodore Ts'o goto failed_mount4a; 4136f9ae9cf5STheodore Ts'o } 4137f9ae9cf5STheodore Ts'o 4138f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4139f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4140f9ae9cf5STheodore Ts'o if (err) { 4141f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4142f9ae9cf5STheodore Ts'o err); 4143dcf2d804STao Ma goto failed_mount5; 4144c2774d84SAneesh Kumar K.V } 4145c2774d84SAneesh Kumar K.V 4146d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4147d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4148d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4149908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4150908c7f19STejun Heo GFP_KERNEL); 4151d5e03cbbSTheodore Ts'o if (!err) { 4152d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4153d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4154908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4155908c7f19STejun Heo GFP_KERNEL); 4156d5e03cbbSTheodore Ts'o } 4157d5e03cbbSTheodore Ts'o if (!err) 4158d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4159908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4160d5e03cbbSTheodore Ts'o if (!err) 4161908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4162908c7f19STejun Heo GFP_KERNEL); 4163d5e03cbbSTheodore Ts'o if (err) { 4164d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4165d5e03cbbSTheodore Ts'o goto failed_mount6; 4166d5e03cbbSTheodore Ts'o } 4167d5e03cbbSTheodore Ts'o 4168d5e03cbbSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 4169d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4170d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4171d5e03cbbSTheodore Ts'o "unable to initialize " 4172d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4173d5e03cbbSTheodore Ts'o goto failed_mount6; 4174d5e03cbbSTheodore Ts'o } 4175d5e03cbbSTheodore Ts'o 4176bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4177bfff6873SLukas Czerner if (err) 4178dcf2d804STao Ma goto failed_mount6; 4179bfff6873SLukas Czerner 41803197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 41813197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 41823197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 41833197ebdbSTheodore Ts'o "%s", sb->s_id); 4184dcf2d804STao Ma if (err) 4185dcf2d804STao Ma goto failed_mount7; 41863197ebdbSTheodore Ts'o 41879b2ff357SJan Kara #ifdef CONFIG_QUOTA 41889b2ff357SJan Kara /* Enable quota usage during mount. */ 41899b2ff357SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 41909b2ff357SJan Kara !(sb->s_flags & MS_RDONLY)) { 41919b2ff357SJan Kara err = ext4_enable_quotas(sb); 41929b2ff357SJan Kara if (err) 41939b2ff357SJan Kara goto failed_mount8; 41949b2ff357SJan Kara } 41959b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 41969b2ff357SJan Kara 4197617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4198617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4199617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 42000390131bSFrank Mayhar if (needs_recovery) { 4201b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4202617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 42030390131bSFrank Mayhar } 42040390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 42050390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 42060390131bSFrank Mayhar descr = " journalled data mode"; 42070390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 42080390131bSFrank Mayhar descr = " ordered data mode"; 42090390131bSFrank Mayhar else 42100390131bSFrank Mayhar descr = " writeback data mode"; 42110390131bSFrank Mayhar } else 42120390131bSFrank Mayhar descr = "out journal"; 42130390131bSFrank Mayhar 421479add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 421579add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 421679add3a3SLukas Czerner if (!blk_queue_discard(q)) 421779add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 421879add3a3SLukas Czerner "mounting with \"discard\" option, but " 421979add3a3SLukas Czerner "the device does not support discard"); 422079add3a3SLukas Czerner } 422179add3a3SLukas Czerner 4222d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 42238b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 42248b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4225ac27a0ecSDave Kleikamp 422666e61a9eSTheodore Ts'o if (es->s_error_count) 422766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4228ac27a0ecSDave Kleikamp 4229efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4230efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4231efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4232efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4233efbed4dcSTheodore Ts'o 4234d4c402d9SCurt Wohlgemuth kfree(orig_data); 4235ac27a0ecSDave Kleikamp return 0; 4236ac27a0ecSDave Kleikamp 4237617ba13bSMingming Cao cantfind_ext4: 4238ac27a0ecSDave Kleikamp if (!silent) 4239b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4240ac27a0ecSDave Kleikamp goto failed_mount; 4241ac27a0ecSDave Kleikamp 424272ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 424372ba7450STheodore Ts'o failed_mount8: 424472ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 424572ba7450STheodore Ts'o #endif 4246dcf2d804STao Ma failed_mount7: 4247dcf2d804STao Ma ext4_unregister_li_request(sb); 4248dcf2d804STao Ma failed_mount6: 4249f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4250d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4251b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4252d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4253d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4254d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4255d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 425600764937SAzat Khuzhin failed_mount5: 4257f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4258f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4259f9ae9cf5STheodore Ts'o failed_mount4a: 426094bf608aSAl Viro dput(sb->s_root); 426132a9bb57SManish Katiyar sb->s_root = NULL; 426294bf608aSAl Viro failed_mount4: 4263b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 42642e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 42652e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 42664c0425ffSMingming Cao failed_mount_wq: 42670390131bSFrank Mayhar if (sbi->s_journal) { 4268dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 426947b4a50bSJan Kara sbi->s_journal = NULL; 42700390131bSFrank Mayhar } 427150460fe8SDarrick J. Wong failed_mount3a: 4272d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4273eb68d0e2SZheng Liu failed_mount3: 42749105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4275c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4276c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4277ac27a0ecSDave Kleikamp failed_mount2: 4278ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4279ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4280b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4281ac27a0ecSDave Kleikamp failed_mount: 42820441984aSDarrick J. Wong if (sbi->s_chksum_driver) 42830441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4284240799cdSTheodore Ts'o if (sbi->s_proc) { 428566acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 42869f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4287240799cdSTheodore Ts'o } 4288ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4289a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4290ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4291ac27a0ecSDave Kleikamp #endif 4292617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4293ac27a0ecSDave Kleikamp brelse(bh); 4294ac27a0ecSDave Kleikamp out_fail: 4295ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4296f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4297ac27a0ecSDave Kleikamp kfree(sbi); 4298dcc7dae3SCyrill Gorcunov out_free_orig: 4299d4c402d9SCurt Wohlgemuth kfree(orig_data); 430007aa2ea1SLukas Czerner return err ? err : ret; 4301ac27a0ecSDave Kleikamp } 4302ac27a0ecSDave Kleikamp 4303ac27a0ecSDave Kleikamp /* 4304ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4305ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4306ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4307ac27a0ecSDave Kleikamp */ 4308617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4309ac27a0ecSDave Kleikamp { 4310617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4311ac27a0ecSDave Kleikamp 4312ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 431330773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 431430773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4315ac27a0ecSDave Kleikamp 4316a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4317ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4318dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4319ac27a0ecSDave Kleikamp else 4320dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 43215bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 43225bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 43235bf5683aSHidehiro Kawai else 43245bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4325a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4326ac27a0ecSDave Kleikamp } 4327ac27a0ecSDave Kleikamp 4328617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4329ac27a0ecSDave Kleikamp unsigned int journal_inum) 4330ac27a0ecSDave Kleikamp { 4331ac27a0ecSDave Kleikamp struct inode *journal_inode; 4332ac27a0ecSDave Kleikamp journal_t *journal; 4333ac27a0ecSDave Kleikamp 43340390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43350390131bSFrank Mayhar 4336ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4337ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4338ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4339ac27a0ecSDave Kleikamp 43401d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43411d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4342b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4343ac27a0ecSDave Kleikamp return NULL; 4344ac27a0ecSDave Kleikamp } 4345ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4346ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4347ac27a0ecSDave Kleikamp iput(journal_inode); 4348b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4349ac27a0ecSDave Kleikamp return NULL; 4350ac27a0ecSDave Kleikamp } 4351ac27a0ecSDave Kleikamp 4352e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4353ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 43541d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4355b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4356ac27a0ecSDave Kleikamp iput(journal_inode); 4357ac27a0ecSDave Kleikamp return NULL; 4358ac27a0ecSDave Kleikamp } 4359ac27a0ecSDave Kleikamp 4360dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4361ac27a0ecSDave Kleikamp if (!journal) { 4362b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4363ac27a0ecSDave Kleikamp iput(journal_inode); 4364ac27a0ecSDave Kleikamp return NULL; 4365ac27a0ecSDave Kleikamp } 4366ac27a0ecSDave Kleikamp journal->j_private = sb; 4367617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4368ac27a0ecSDave Kleikamp return journal; 4369ac27a0ecSDave Kleikamp } 4370ac27a0ecSDave Kleikamp 4371617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4372ac27a0ecSDave Kleikamp dev_t j_dev) 4373ac27a0ecSDave Kleikamp { 4374ac27a0ecSDave Kleikamp struct buffer_head *bh; 4375ac27a0ecSDave Kleikamp journal_t *journal; 4376617ba13bSMingming Cao ext4_fsblk_t start; 4377617ba13bSMingming Cao ext4_fsblk_t len; 4378ac27a0ecSDave Kleikamp int hblock, blocksize; 4379617ba13bSMingming Cao ext4_fsblk_t sb_block; 4380ac27a0ecSDave Kleikamp unsigned long offset; 4381617ba13bSMingming Cao struct ext4_super_block *es; 4382ac27a0ecSDave Kleikamp struct block_device *bdev; 4383ac27a0ecSDave Kleikamp 43840390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43850390131bSFrank Mayhar 4386b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4387ac27a0ecSDave Kleikamp if (bdev == NULL) 4388ac27a0ecSDave Kleikamp return NULL; 4389ac27a0ecSDave Kleikamp 4390ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4391e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4392ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4393b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4394b31e1552SEric Sandeen "blocksize too small for journal device"); 4395ac27a0ecSDave Kleikamp goto out_bdev; 4396ac27a0ecSDave Kleikamp } 4397ac27a0ecSDave Kleikamp 4398617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4399617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4400ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4401ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4402b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4403b31e1552SEric Sandeen "external journal"); 4404ac27a0ecSDave Kleikamp goto out_bdev; 4405ac27a0ecSDave Kleikamp } 4406ac27a0ecSDave Kleikamp 44072716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4408617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4409ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4410617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4411b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4412b31e1552SEric Sandeen "bad superblock"); 4413ac27a0ecSDave Kleikamp brelse(bh); 4414ac27a0ecSDave Kleikamp goto out_bdev; 4415ac27a0ecSDave Kleikamp } 4416ac27a0ecSDave Kleikamp 4417df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4418df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4419df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4420df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4421df4763beSDarrick J. Wong "corrupt superblock"); 4422df4763beSDarrick J. Wong brelse(bh); 4423df4763beSDarrick J. Wong goto out_bdev; 4424df4763beSDarrick J. Wong } 4425df4763beSDarrick J. Wong 4426617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4427b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4428ac27a0ecSDave Kleikamp brelse(bh); 4429ac27a0ecSDave Kleikamp goto out_bdev; 4430ac27a0ecSDave Kleikamp } 4431ac27a0ecSDave Kleikamp 4432bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4433ac27a0ecSDave Kleikamp start = sb_block + 1; 4434ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4435ac27a0ecSDave Kleikamp 4436dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4437ac27a0ecSDave Kleikamp start, len, blocksize); 4438ac27a0ecSDave Kleikamp if (!journal) { 4439b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4440ac27a0ecSDave Kleikamp goto out_bdev; 4441ac27a0ecSDave Kleikamp } 4442ac27a0ecSDave Kleikamp journal->j_private = sb; 44439f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4444ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4445ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4446b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4447ac27a0ecSDave Kleikamp goto out_journal; 4448ac27a0ecSDave Kleikamp } 4449ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4450b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4451b31e1552SEric Sandeen "user (unsupported) - %d", 4452ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4453ac27a0ecSDave Kleikamp goto out_journal; 4454ac27a0ecSDave Kleikamp } 4455617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4456617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4457ac27a0ecSDave Kleikamp return journal; 44580b8e58a1SAndreas Dilger 4459ac27a0ecSDave Kleikamp out_journal: 4460dab291afSMingming Cao jbd2_journal_destroy(journal); 4461ac27a0ecSDave Kleikamp out_bdev: 4462617ba13bSMingming Cao ext4_blkdev_put(bdev); 4463ac27a0ecSDave Kleikamp return NULL; 4464ac27a0ecSDave Kleikamp } 4465ac27a0ecSDave Kleikamp 4466617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4467617ba13bSMingming Cao struct ext4_super_block *es, 4468ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4469ac27a0ecSDave Kleikamp { 4470ac27a0ecSDave Kleikamp journal_t *journal; 4471ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4472ac27a0ecSDave Kleikamp dev_t journal_dev; 4473ac27a0ecSDave Kleikamp int err = 0; 4474ac27a0ecSDave Kleikamp int really_read_only; 4475ac27a0ecSDave Kleikamp 44760390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44770390131bSFrank Mayhar 4478ac27a0ecSDave Kleikamp if (journal_devnum && 4479ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4480b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4481b31e1552SEric Sandeen "numbers have changed"); 4482ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4483ac27a0ecSDave Kleikamp } else 4484ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4485ac27a0ecSDave Kleikamp 4486ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4487ac27a0ecSDave Kleikamp 4488ac27a0ecSDave Kleikamp /* 4489ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4490ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4491ac27a0ecSDave Kleikamp * can get read-write access to the device. 4492ac27a0ecSDave Kleikamp */ 4493617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4494ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4495b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4496b31e1552SEric Sandeen "required on readonly filesystem"); 4497ac27a0ecSDave Kleikamp if (really_read_only) { 4498b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4499b31e1552SEric Sandeen "unavailable, cannot proceed"); 4500ac27a0ecSDave Kleikamp return -EROFS; 4501ac27a0ecSDave Kleikamp } 4502b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4503b31e1552SEric Sandeen "be enabled during recovery"); 4504ac27a0ecSDave Kleikamp } 4505ac27a0ecSDave Kleikamp } 4506ac27a0ecSDave Kleikamp 4507ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4508b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4509b31e1552SEric Sandeen "and inode journals!"); 4510ac27a0ecSDave Kleikamp return -EINVAL; 4511ac27a0ecSDave Kleikamp } 4512ac27a0ecSDave Kleikamp 4513ac27a0ecSDave Kleikamp if (journal_inum) { 4514617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4515ac27a0ecSDave Kleikamp return -EINVAL; 4516ac27a0ecSDave Kleikamp } else { 4517617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4518ac27a0ecSDave Kleikamp return -EINVAL; 4519ac27a0ecSDave Kleikamp } 4520ac27a0ecSDave Kleikamp 452190576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4522b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 45234776004fSTheodore Ts'o 4524617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4525dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 45261c13d5c0STheodore Ts'o if (!err) { 45271c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 45281c13d5c0STheodore Ts'o if (save) 45291c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 45301c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4531dab291afSMingming Cao err = jbd2_journal_load(journal); 45321c13d5c0STheodore Ts'o if (save) 45331c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 45341c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 45351c13d5c0STheodore Ts'o kfree(save); 45361c13d5c0STheodore Ts'o } 4537ac27a0ecSDave Kleikamp 4538ac27a0ecSDave Kleikamp if (err) { 4539b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4540dab291afSMingming Cao jbd2_journal_destroy(journal); 4541ac27a0ecSDave Kleikamp return err; 4542ac27a0ecSDave Kleikamp } 4543ac27a0ecSDave Kleikamp 4544617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4545617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4546ac27a0ecSDave Kleikamp 4547c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4548ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4549ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4550ac27a0ecSDave Kleikamp 4551ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4552e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4553ac27a0ecSDave Kleikamp } 4554ac27a0ecSDave Kleikamp 4555ac27a0ecSDave Kleikamp return 0; 4556ac27a0ecSDave Kleikamp } 4557ac27a0ecSDave Kleikamp 4558e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4559ac27a0ecSDave Kleikamp { 4560e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4561617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4562c4be0c1dSTakashi Sato int error = 0; 4563ac27a0ecSDave Kleikamp 456408439fecSChristoph Hellwig if (!sbh) 4565c4be0c1dSTakashi Sato return error; 4566914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4567914258bfSTheodore Ts'o /* 4568914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4569914258bfSTheodore Ts'o * superblock failed. This could happen because the 4570914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4571914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4572914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4573914258bfSTheodore Ts'o * write and hope for the best. 4574914258bfSTheodore Ts'o */ 4575b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4576b31e1552SEric Sandeen "superblock detected"); 4577914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4578914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4579914258bfSTheodore Ts'o } 458071290b36STheodore Ts'o /* 458171290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 458271290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 458371290b36STheodore Ts'o * write time when we are mounting the root file system 458471290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 458571290b36STheodore Ts'o * for people who are east of GMT and who make their clock 458671290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 458771290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 458871290b36STheodore Ts'o * to complain and force a full file system check. 458971290b36STheodore Ts'o */ 459071290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4591ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4592f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4593afc32f7eSTheodore Ts'o es->s_kbytes_written = 4594afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4595afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4596afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4597f613dfcbSTheodore Ts'o else 4598f613dfcbSTheodore Ts'o es->s_kbytes_written = 4599f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4600d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 460157042651STheodore Ts'o ext4_free_blocks_count_set(es, 460257042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 460357042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4604d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 46057f93cff9STheodore Ts'o es->s_free_inodes_count = 46067f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 46075d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4608ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 460906db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4610ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4611914258bfSTheodore Ts'o if (sync) { 4612c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4613c4be0c1dSTakashi Sato if (error) 4614c4be0c1dSTakashi Sato return error; 4615c4be0c1dSTakashi Sato 4616c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4617c4be0c1dSTakashi Sato if (error) { 4618b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4619b31e1552SEric Sandeen "superblock"); 4620914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4621914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4622914258bfSTheodore Ts'o } 4623914258bfSTheodore Ts'o } 4624c4be0c1dSTakashi Sato return error; 4625ac27a0ecSDave Kleikamp } 4626ac27a0ecSDave Kleikamp 4627ac27a0ecSDave Kleikamp /* 4628ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4629ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4630ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4631ac27a0ecSDave Kleikamp */ 4632617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4633617ba13bSMingming Cao struct ext4_super_block *es) 4634ac27a0ecSDave Kleikamp { 4635617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4636ac27a0ecSDave Kleikamp 46370390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 46380390131bSFrank Mayhar BUG_ON(journal != NULL); 46390390131bSFrank Mayhar return; 46400390131bSFrank Mayhar } 4641dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46427ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 46437ffe1ea8SHidehiro Kawai goto out; 46447ffe1ea8SHidehiro Kawai 4645617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4646ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4647617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4648e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4649ac27a0ecSDave Kleikamp } 46507ffe1ea8SHidehiro Kawai 46517ffe1ea8SHidehiro Kawai out: 4652dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4653ac27a0ecSDave Kleikamp } 4654ac27a0ecSDave Kleikamp 4655ac27a0ecSDave Kleikamp /* 4656ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4657ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4658ac27a0ecSDave Kleikamp * main filesystem now. 4659ac27a0ecSDave Kleikamp */ 4660617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4661617ba13bSMingming Cao struct ext4_super_block *es) 4662ac27a0ecSDave Kleikamp { 4663ac27a0ecSDave Kleikamp journal_t *journal; 4664ac27a0ecSDave Kleikamp int j_errno; 4665ac27a0ecSDave Kleikamp const char *errstr; 4666ac27a0ecSDave Kleikamp 46670390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 46680390131bSFrank Mayhar 4669617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4670ac27a0ecSDave Kleikamp 4671ac27a0ecSDave Kleikamp /* 4672ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4673617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4674ac27a0ecSDave Kleikamp */ 4675ac27a0ecSDave Kleikamp 4676dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4677ac27a0ecSDave Kleikamp if (j_errno) { 4678ac27a0ecSDave Kleikamp char nbuf[16]; 4679ac27a0ecSDave Kleikamp 4680617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 468112062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4682ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 468312062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4684ac27a0ecSDave Kleikamp 4685617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4686617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4687e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4688ac27a0ecSDave Kleikamp 4689dab291afSMingming Cao jbd2_journal_clear_err(journal); 4690d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4691ac27a0ecSDave Kleikamp } 4692ac27a0ecSDave Kleikamp } 4693ac27a0ecSDave Kleikamp 4694ac27a0ecSDave Kleikamp /* 4695ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4696ac27a0ecSDave Kleikamp * and wait on the commit. 4697ac27a0ecSDave Kleikamp */ 4698617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4699ac27a0ecSDave Kleikamp { 4700ac27a0ecSDave Kleikamp journal_t *journal; 4701ac27a0ecSDave Kleikamp 4702ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4703ac27a0ecSDave Kleikamp return 0; 4704ac27a0ecSDave Kleikamp 4705617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4706b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4707ac27a0ecSDave Kleikamp } 4708ac27a0ecSDave Kleikamp 4709617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4710ac27a0ecSDave Kleikamp { 471114ce0cb4STheodore Ts'o int ret = 0; 47129eddacf9SJan Kara tid_t target; 471306a407f1SDmitry Monakhov bool needs_barrier = false; 47148d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4715ac27a0ecSDave Kleikamp 47169bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 47172e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4718a1177825SJan Kara /* 4719a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4720a1177825SJan Kara * no dirty dquots 4721a1177825SJan Kara */ 4722a1177825SJan Kara dquot_writeback_dquots(sb, -1); 472306a407f1SDmitry Monakhov /* 472406a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 472506a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 472606a407f1SDmitry Monakhov * transaction_commit will do it for us. 472706a407f1SDmitry Monakhov */ 4728bda32530STheodore Ts'o if (sbi->s_journal) { 472906a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 473006a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 473106a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 473206a407f1SDmitry Monakhov needs_barrier = true; 473306a407f1SDmitry Monakhov 47348d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4735ac27a0ecSDave Kleikamp if (wait) 4736bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4737bda32530STheodore Ts'o target); 47380390131bSFrank Mayhar } 4739bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4740bda32530STheodore Ts'o needs_barrier = true; 474106a407f1SDmitry Monakhov if (needs_barrier) { 474206a407f1SDmitry Monakhov int err; 474306a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 474406a407f1SDmitry Monakhov if (!ret) 474506a407f1SDmitry Monakhov ret = err; 474606a407f1SDmitry Monakhov } 474706a407f1SDmitry Monakhov 474806a407f1SDmitry Monakhov return ret; 474906a407f1SDmitry Monakhov } 475006a407f1SDmitry Monakhov 4751ac27a0ecSDave Kleikamp /* 4752ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4753ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4754be4f27d3SYongqiang Yang * 4755be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 47568e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 47578e8ad8a5SJan Kara * modifications. 4758ac27a0ecSDave Kleikamp */ 4759c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4760ac27a0ecSDave Kleikamp { 4761c4be0c1dSTakashi Sato int error = 0; 4762c4be0c1dSTakashi Sato journal_t *journal; 4763ac27a0ecSDave Kleikamp 47649ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47659ca92389STheodore Ts'o return 0; 47669ca92389STheodore Ts'o 4767c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4768ac27a0ecSDave Kleikamp 4769bb044576STheodore Ts'o if (journal) { 4770ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4771dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47727ffe1ea8SHidehiro Kawai 47737ffe1ea8SHidehiro Kawai /* 4774bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4775bb044576STheodore Ts'o * flush the journal. 47767ffe1ea8SHidehiro Kawai */ 4777c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 47786b0310fbSEric Sandeen if (error < 0) 47796b0310fbSEric Sandeen goto out; 4780bb044576STheodore Ts'o } 4781ac27a0ecSDave Kleikamp 4782ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4783617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4784e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 47856b0310fbSEric Sandeen out: 4786bb044576STheodore Ts'o if (journal) 47878e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4788bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 47896b0310fbSEric Sandeen return error; 4790ac27a0ecSDave Kleikamp } 4791ac27a0ecSDave Kleikamp 4792ac27a0ecSDave Kleikamp /* 4793ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4794ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4795ac27a0ecSDave Kleikamp */ 4796c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4797ac27a0ecSDave Kleikamp { 47989ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47999ca92389STheodore Ts'o return 0; 48009ca92389STheodore Ts'o 48019ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4802617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4803e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4804c4be0c1dSTakashi Sato return 0; 4805ac27a0ecSDave Kleikamp } 4806ac27a0ecSDave Kleikamp 4807673c6100STheodore Ts'o /* 4808673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4809673c6100STheodore Ts'o */ 4810673c6100STheodore Ts'o struct ext4_mount_options { 4811673c6100STheodore Ts'o unsigned long s_mount_opt; 4812a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 481308cefc7aSEric W. Biederman kuid_t s_resuid; 481408cefc7aSEric W. Biederman kgid_t s_resgid; 4815673c6100STheodore Ts'o unsigned long s_commit_interval; 4816673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4817673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4818673c6100STheodore Ts'o int s_jquota_fmt; 4819a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4820673c6100STheodore Ts'o #endif 4821673c6100STheodore Ts'o }; 4822673c6100STheodore Ts'o 4823617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4824ac27a0ecSDave Kleikamp { 4825617ba13bSMingming Cao struct ext4_super_block *es; 4826617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4827ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4828617ba13bSMingming Cao struct ext4_mount_options old_opts; 4829c79d967dSChristoph Hellwig int enable_quota = 0; 48308a266467STheodore Ts'o ext4_group_t g; 4831b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4832c5e06d10SJohann Lombardi int err = 0; 4833ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 483403dafb5fSChen Gang int i, j; 4835ac27a0ecSDave Kleikamp #endif 4836d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4837ac27a0ecSDave Kleikamp 4838ac27a0ecSDave Kleikamp /* Store the original options */ 4839ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4840ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4841a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4842ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4843ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4844ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 484530773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 484630773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4847ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4848ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4849a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 485003dafb5fSChen Gang if (sbi->s_qf_names[i]) { 485103dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 485203dafb5fSChen Gang GFP_KERNEL); 485303dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 485403dafb5fSChen Gang for (j = 0; j < i; j++) 485503dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 48563e36a163SWei Yongjun kfree(orig_data); 485703dafb5fSChen Gang return -ENOMEM; 485803dafb5fSChen Gang } 485903dafb5fSChen Gang } else 486003dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4861ac27a0ecSDave Kleikamp #endif 4862b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4863b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4864ac27a0ecSDave Kleikamp 4865661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4866ac27a0ecSDave Kleikamp err = -EINVAL; 4867ac27a0ecSDave Kleikamp goto restore_opts; 4868ac27a0ecSDave Kleikamp } 4869ac27a0ecSDave Kleikamp 48706b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 48716b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 48726b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 48732d5b86e0SEric Sandeen "during remount not supported; ignoring"); 48742d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 4875c6d3d56dSDarrick J. Wong } 4876c6d3d56dSDarrick J. Wong 48776ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 48786ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 48796ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48806ae6514bSPiotr Sarna "both data=journal and delalloc"); 48816ae6514bSPiotr Sarna err = -EINVAL; 48826ae6514bSPiotr Sarna goto restore_opts; 48836ae6514bSPiotr Sarna } 48846ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 48856ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48866ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 48876ae6514bSPiotr Sarna err = -EINVAL; 48886ae6514bSPiotr Sarna goto restore_opts; 48896ae6514bSPiotr Sarna } 4890923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 4891923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4892923ae0ffSRoss Zwisler "both data=journal and dax"); 4893923ae0ffSRoss Zwisler err = -EINVAL; 4894923ae0ffSRoss Zwisler goto restore_opts; 4895923ae0ffSRoss Zwisler } 4896923ae0ffSRoss Zwisler } 4897923ae0ffSRoss Zwisler 4898923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 4899923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 4900923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 4901923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 49026ae6514bSPiotr Sarna } 49036ae6514bSPiotr Sarna 49044ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4905c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4906ac27a0ecSDave Kleikamp 4907ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4908482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4909ac27a0ecSDave Kleikamp 4910ac27a0ecSDave Kleikamp es = sbi->s_es; 4911ac27a0ecSDave Kleikamp 4912b3881f74STheodore Ts'o if (sbi->s_journal) { 4913617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4914b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4915b3881f74STheodore Ts'o } 4916ac27a0ecSDave Kleikamp 4917661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 49184ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4919ac27a0ecSDave Kleikamp err = -EROFS; 4920ac27a0ecSDave Kleikamp goto restore_opts; 4921ac27a0ecSDave Kleikamp } 4922ac27a0ecSDave Kleikamp 4923ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 492438c03b34STheodore Ts'o err = sync_filesystem(sb); 492538c03b34STheodore Ts'o if (err < 0) 492638c03b34STheodore Ts'o goto restore_opts; 49270f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 49280f0dd62fSChristoph Hellwig if (err < 0) 4929c79d967dSChristoph Hellwig goto restore_opts; 4930c79d967dSChristoph Hellwig 4931ac27a0ecSDave Kleikamp /* 4932ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4933ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4934ac27a0ecSDave Kleikamp */ 4935ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4936ac27a0ecSDave Kleikamp 4937ac27a0ecSDave Kleikamp /* 4938ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4939ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4940ac27a0ecSDave Kleikamp * mark the partition as valid again. 4941ac27a0ecSDave Kleikamp */ 4942617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4943617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4944ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4945ac27a0ecSDave Kleikamp 4946a63c9eb2STheodore Ts'o if (sbi->s_journal) 4947617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4948ac27a0ecSDave Kleikamp } else { 4949a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 49502cb5cc8bSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 49512cb5cc8bSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_READONLY) || 49522cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 4953ac27a0ecSDave Kleikamp err = -EROFS; 4954ac27a0ecSDave Kleikamp goto restore_opts; 4955ac27a0ecSDave Kleikamp } 4956ead6596bSEric Sandeen /* 49578a266467STheodore Ts'o * Make sure the group descriptor checksums 49580b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 49598a266467STheodore Ts'o */ 49608a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 49618a266467STheodore Ts'o struct ext4_group_desc *gdp = 49628a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 49638a266467STheodore Ts'o 4964feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4965b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4966b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 49678a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 49688a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 49698a266467STheodore Ts'o err = -EINVAL; 49708a266467STheodore Ts'o goto restore_opts; 49718a266467STheodore Ts'o } 49728a266467STheodore Ts'o } 49738a266467STheodore Ts'o 49748a266467STheodore Ts'o /* 4975ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4976ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4977ead6596bSEric Sandeen * require a full umount/remount for now. 4978ead6596bSEric Sandeen */ 4979ead6596bSEric Sandeen if (es->s_last_orphan) { 4980b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4981ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4982ead6596bSEric Sandeen "orphan inode list. Please " 4983b31e1552SEric Sandeen "umount/remount instead"); 4984ead6596bSEric Sandeen err = -EINVAL; 4985ead6596bSEric Sandeen goto restore_opts; 4986ead6596bSEric Sandeen } 4987ead6596bSEric Sandeen 4988ac27a0ecSDave Kleikamp /* 4989ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4990ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4991ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4992ac27a0ecSDave Kleikamp * the partition.) 4993ac27a0ecSDave Kleikamp */ 49940390131bSFrank Mayhar if (sbi->s_journal) 4995617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4996ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4997617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4998ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4999c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 5000c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 5001c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5002c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5003c5e06d10SJohann Lombardi err = -EROFS; 5004c5e06d10SJohann Lombardi goto restore_opts; 5005c5e06d10SJohann Lombardi } 5006c79d967dSChristoph Hellwig enable_quota = 1; 5007ac27a0ecSDave Kleikamp } 5008ac27a0ecSDave Kleikamp } 5009bfff6873SLukas Czerner 5010bfff6873SLukas Czerner /* 5011bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5012bfff6873SLukas Czerner * current settings 5013bfff6873SLukas Czerner */ 5014bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 5015bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5016bfff6873SLukas Czerner else { 5017bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5018bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5019bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5020bfff6873SLukas Czerner } 5021bfff6873SLukas Czerner 50226fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5023d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 5024e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 50250390131bSFrank Mayhar 5026ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5027ac27a0ecSDave Kleikamp /* Release old quota file names */ 5028a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5029ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 50307c319d32SAditya Kali if (enable_quota) { 50317c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 50320f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 50337c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 50347c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 50357c319d32SAditya Kali err = ext4_enable_quotas(sb); 503607724f98STheodore Ts'o if (err) 50377c319d32SAditya Kali goto restore_opts; 50387c319d32SAditya Kali } 50397c319d32SAditya Kali } 50407c319d32SAditya Kali #endif 5041d4c402d9SCurt Wohlgemuth 5042a26f4992STheodore Ts'o *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); 5043d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5044d4c402d9SCurt Wohlgemuth kfree(orig_data); 5045ac27a0ecSDave Kleikamp return 0; 50460b8e58a1SAndreas Dilger 5047ac27a0ecSDave Kleikamp restore_opts: 5048ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5049ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5050a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5051ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5052ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5053ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 505430773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 505530773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5056ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5057ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5058a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5059ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5060ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5061ac27a0ecSDave Kleikamp } 5062ac27a0ecSDave Kleikamp #endif 5063d4c402d9SCurt Wohlgemuth kfree(orig_data); 5064ac27a0ecSDave Kleikamp return err; 5065ac27a0ecSDave Kleikamp } 5066ac27a0ecSDave Kleikamp 5067617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5068ac27a0ecSDave Kleikamp { 5069ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5070617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5071617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 507227dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5073960cc398SPekka Enberg u64 fsid; 5074d02a9391SKazuya Mio s64 bfree; 507527dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5076ac27a0ecSDave Kleikamp 5077952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5078952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5079ac27a0ecSDave Kleikamp 5080617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5081ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5082b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 508357042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 508457042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5085d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 508657042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 508727dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 508827dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 508927dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5090ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5091ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 509252d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5093617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5094960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5095960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5096960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5097960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 50980b8e58a1SAndreas Dilger 5099ac27a0ecSDave Kleikamp return 0; 5100ac27a0ecSDave Kleikamp } 5101ac27a0ecSDave Kleikamp 51020b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 51030b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5104ac27a0ecSDave Kleikamp * Process 1 Process 2 5105617ba13bSMingming Cao * ext4_create() quota_sync() 5106dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5107871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5108dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5109ac27a0ecSDave Kleikamp * 5110ac27a0ecSDave Kleikamp */ 5111ac27a0ecSDave Kleikamp 5112ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5113ac27a0ecSDave Kleikamp 5114ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5115ac27a0ecSDave Kleikamp { 51164c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5117ac27a0ecSDave Kleikamp } 5118ac27a0ecSDave Kleikamp 5119617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5120ac27a0ecSDave Kleikamp { 5121ac27a0ecSDave Kleikamp int ret, err; 5122ac27a0ecSDave Kleikamp handle_t *handle; 5123ac27a0ecSDave Kleikamp struct inode *inode; 5124ac27a0ecSDave Kleikamp 5125ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 51269924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5127617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5128ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5129ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5130ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5131617ba13bSMingming Cao err = ext4_journal_stop(handle); 5132ac27a0ecSDave Kleikamp if (!ret) 5133ac27a0ecSDave Kleikamp ret = err; 5134ac27a0ecSDave Kleikamp return ret; 5135ac27a0ecSDave Kleikamp } 5136ac27a0ecSDave Kleikamp 5137617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5138ac27a0ecSDave Kleikamp { 5139ac27a0ecSDave Kleikamp int ret, err; 5140ac27a0ecSDave Kleikamp handle_t *handle; 5141ac27a0ecSDave Kleikamp 51429924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5143617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5144ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5145ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5146ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5147617ba13bSMingming Cao err = ext4_journal_stop(handle); 5148ac27a0ecSDave Kleikamp if (!ret) 5149ac27a0ecSDave Kleikamp ret = err; 5150ac27a0ecSDave Kleikamp return ret; 5151ac27a0ecSDave Kleikamp } 5152ac27a0ecSDave Kleikamp 5153617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5154ac27a0ecSDave Kleikamp { 5155ac27a0ecSDave Kleikamp int ret, err; 5156ac27a0ecSDave Kleikamp handle_t *handle; 5157ac27a0ecSDave Kleikamp 51589924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5159617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 51609c3013e9SJan Kara if (IS_ERR(handle)) { 51619c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 51629c3013e9SJan Kara dquot_release(dquot); 5163ac27a0ecSDave Kleikamp return PTR_ERR(handle); 51649c3013e9SJan Kara } 5165ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5166617ba13bSMingming Cao err = ext4_journal_stop(handle); 5167ac27a0ecSDave Kleikamp if (!ret) 5168ac27a0ecSDave Kleikamp ret = err; 5169ac27a0ecSDave Kleikamp return ret; 5170ac27a0ecSDave Kleikamp } 5171ac27a0ecSDave Kleikamp 5172617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5173ac27a0ecSDave Kleikamp { 5174262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5175262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5176262b4662SJan Kara 51772c8be6b2SJan Kara /* Are we journaling quotas? */ 5178262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 5179262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5180ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5181617ba13bSMingming Cao return ext4_write_dquot(dquot); 5182ac27a0ecSDave Kleikamp } else { 5183ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5184ac27a0ecSDave Kleikamp } 5185ac27a0ecSDave Kleikamp } 5186ac27a0ecSDave Kleikamp 5187617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5188ac27a0ecSDave Kleikamp { 5189ac27a0ecSDave Kleikamp int ret, err; 5190ac27a0ecSDave Kleikamp handle_t *handle; 5191ac27a0ecSDave Kleikamp 5192ac27a0ecSDave Kleikamp /* Data block + inode block */ 51939924a92aSTheodore Ts'o handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); 5194ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5195ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5196ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5197617ba13bSMingming Cao err = ext4_journal_stop(handle); 5198ac27a0ecSDave Kleikamp if (!ret) 5199ac27a0ecSDave Kleikamp ret = err; 5200ac27a0ecSDave Kleikamp return ret; 5201ac27a0ecSDave Kleikamp } 5202ac27a0ecSDave Kleikamp 5203ac27a0ecSDave Kleikamp /* 5204ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5205ac27a0ecSDave Kleikamp * the quota file and such... 5206ac27a0ecSDave Kleikamp */ 5207617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5208ac27a0ecSDave Kleikamp { 5209287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5210617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5211ac27a0ecSDave Kleikamp } 5212ac27a0ecSDave Kleikamp 5213ac27a0ecSDave Kleikamp /* 5214ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5215ac27a0ecSDave Kleikamp */ 5216617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5217f00c9e44SJan Kara struct path *path) 5218ac27a0ecSDave Kleikamp { 5219ac27a0ecSDave Kleikamp int err; 5220ac27a0ecSDave Kleikamp 5221ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5222ac27a0ecSDave Kleikamp return -EINVAL; 52230623543bSJan Kara 5224ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5225d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5226ac27a0ecSDave Kleikamp return -EXDEV; 52270623543bSJan Kara /* Journaling quota? */ 52280623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 52292b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5230f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5231b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5232b31e1552SEric Sandeen "Quota file not on filesystem root. " 5233b31e1552SEric Sandeen "Journaled quota will not work"); 52340623543bSJan Kara } 52350623543bSJan Kara 52360623543bSJan Kara /* 52370623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 52380623543bSJan Kara * all updates to the file when we bypass pagecache... 52390623543bSJan Kara */ 52400390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 5241f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 52420623543bSJan Kara /* 52430623543bSJan Kara * We don't need to lock updates but journal_flush() could 52440623543bSJan Kara * otherwise be livelocked... 52450623543bSJan Kara */ 52460623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 52477ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 52480623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5249f00c9e44SJan Kara if (err) 52507ffe1ea8SHidehiro Kawai return err; 52517ffe1ea8SHidehiro Kawai } 52520623543bSJan Kara 5253f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5254ac27a0ecSDave Kleikamp } 5255ac27a0ecSDave Kleikamp 52567c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 52577c319d32SAditya Kali unsigned int flags) 52587c319d32SAditya Kali { 52597c319d32SAditya Kali int err; 52607c319d32SAditya Kali struct inode *qf_inode; 5261a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52627c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52637c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52647c319d32SAditya Kali }; 52657c319d32SAditya Kali 52667c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 52677c319d32SAditya Kali 52687c319d32SAditya Kali if (!qf_inums[type]) 52697c319d32SAditya Kali return -EPERM; 52707c319d32SAditya Kali 52717c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 52727c319d32SAditya Kali if (IS_ERR(qf_inode)) { 52737c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 52747c319d32SAditya Kali return PTR_ERR(qf_inode); 52757c319d32SAditya Kali } 52767c319d32SAditya Kali 5277bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5278bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 52797c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 52807c319d32SAditya Kali iput(qf_inode); 52817c319d32SAditya Kali 52827c319d32SAditya Kali return err; 52837c319d32SAditya Kali } 52847c319d32SAditya Kali 52857c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 52867c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 52877c319d32SAditya Kali { 52887c319d32SAditya Kali int type, err = 0; 5289a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52907c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52917c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52927c319d32SAditya Kali }; 52937c319d32SAditya Kali 52947c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5295a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 52967c319d32SAditya Kali if (qf_inums[type]) { 52977c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 52987c319d32SAditya Kali DQUOT_USAGE_ENABLED); 52997c319d32SAditya Kali if (err) { 53007c319d32SAditya Kali ext4_warning(sb, 530172ba7450STheodore Ts'o "Failed to enable quota tracking " 530272ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 530372ba7450STheodore Ts'o "e2fsck to fix.", type, err); 53047c319d32SAditya Kali return err; 53057c319d32SAditya Kali } 53067c319d32SAditya Kali } 53077c319d32SAditya Kali } 53087c319d32SAditya Kali return 0; 53097c319d32SAditya Kali } 53107c319d32SAditya Kali 5311ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5312ca0e05e4SDmitry Monakhov { 531321f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 531421f97697SJan Kara handle_t *handle; 531521f97697SJan Kara 531687009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 531787009d86SDmitry Monakhov * Caller already holds s_umount sem */ 531887009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5319ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5320ca0e05e4SDmitry Monakhov 53210b268590SAmir Goldstein if (!inode) 53220b268590SAmir Goldstein goto out; 53230b268590SAmir Goldstein 532421f97697SJan Kara /* Update modification times of quota files when userspace can 532521f97697SJan Kara * start looking at them */ 53269924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 532721f97697SJan Kara if (IS_ERR(handle)) 532821f97697SJan Kara goto out; 532921f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 533021f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 533121f97697SJan Kara ext4_journal_stop(handle); 533221f97697SJan Kara 533321f97697SJan Kara out: 5334ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5335ca0e05e4SDmitry Monakhov } 5336ca0e05e4SDmitry Monakhov 5337ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5338ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5339ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5340ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5341617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5342ac27a0ecSDave Kleikamp size_t len, loff_t off) 5343ac27a0ecSDave Kleikamp { 5344ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5345725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5346ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5347ac27a0ecSDave Kleikamp int tocopy; 5348ac27a0ecSDave Kleikamp size_t toread; 5349ac27a0ecSDave Kleikamp struct buffer_head *bh; 5350ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5351ac27a0ecSDave Kleikamp 5352ac27a0ecSDave Kleikamp if (off > i_size) 5353ac27a0ecSDave Kleikamp return 0; 5354ac27a0ecSDave Kleikamp if (off+len > i_size) 5355ac27a0ecSDave Kleikamp len = i_size-off; 5356ac27a0ecSDave Kleikamp toread = len; 5357ac27a0ecSDave Kleikamp while (toread > 0) { 5358ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5359ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 53601c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 53611c215028STheodore Ts'o if (IS_ERR(bh)) 53621c215028STheodore Ts'o return PTR_ERR(bh); 5363ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5364ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5365ac27a0ecSDave Kleikamp else 5366ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5367ac27a0ecSDave Kleikamp brelse(bh); 5368ac27a0ecSDave Kleikamp offset = 0; 5369ac27a0ecSDave Kleikamp toread -= tocopy; 5370ac27a0ecSDave Kleikamp data += tocopy; 5371ac27a0ecSDave Kleikamp blk++; 5372ac27a0ecSDave Kleikamp } 5373ac27a0ecSDave Kleikamp return len; 5374ac27a0ecSDave Kleikamp } 5375ac27a0ecSDave Kleikamp 5376ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5377ac27a0ecSDave Kleikamp * enough credits) */ 5378617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5379ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5380ac27a0ecSDave Kleikamp { 5381ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5382725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 53831c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5384ac27a0ecSDave Kleikamp struct buffer_head *bh; 5385ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5386ac27a0ecSDave Kleikamp 53870390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5388b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5389b31e1552SEric Sandeen " cancelled because transaction is not started", 53909c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 53919c3013e9SJan Kara return -EIO; 53929c3013e9SJan Kara } 539367eeb568SDmitry Monakhov /* 539467eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 539567eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 539667eeb568SDmitry Monakhov */ 539767eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 539867eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 539967eeb568SDmitry Monakhov " cancelled because not block aligned", 540067eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 540167eeb568SDmitry Monakhov return -EIO; 540267eeb568SDmitry Monakhov } 540367eeb568SDmitry Monakhov 54041c215028STheodore Ts'o bh = ext4_bread(handle, inode, blk, 1); 54051c215028STheodore Ts'o if (IS_ERR(bh)) 54061c215028STheodore Ts'o return PTR_ERR(bh); 5407ac27a0ecSDave Kleikamp if (!bh) 5408ac27a0ecSDave Kleikamp goto out; 54095d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5410617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5411ac27a0ecSDave Kleikamp if (err) { 5412ac27a0ecSDave Kleikamp brelse(bh); 54131c215028STheodore Ts'o return err; 5414ac27a0ecSDave Kleikamp } 5415ac27a0ecSDave Kleikamp lock_buffer(bh); 541667eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5417ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5418ac27a0ecSDave Kleikamp unlock_buffer(bh); 54190390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5420ac27a0ecSDave Kleikamp brelse(bh); 5421ac27a0ecSDave Kleikamp out: 542267eeb568SDmitry Monakhov if (inode->i_size < off + len) { 542367eeb568SDmitry Monakhov i_size_write(inode, off + len); 5424617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5425617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 542621f97697SJan Kara } 542767eeb568SDmitry Monakhov return len; 5428ac27a0ecSDave Kleikamp } 5429ac27a0ecSDave Kleikamp 5430ac27a0ecSDave Kleikamp #endif 5431ac27a0ecSDave Kleikamp 5432152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5433152a0836SAl Viro const char *dev_name, void *data) 5434ac27a0ecSDave Kleikamp { 5435152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5436ac27a0ecSDave Kleikamp } 5437ac27a0ecSDave Kleikamp 543837f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 543924b58424STheodore Ts'o static inline void register_as_ext2(void) 544024b58424STheodore Ts'o { 544124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 544224b58424STheodore Ts'o if (err) 544324b58424STheodore Ts'o printk(KERN_WARNING 544424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 544524b58424STheodore Ts'o } 544624b58424STheodore Ts'o 544724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 544824b58424STheodore Ts'o { 544924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 545024b58424STheodore Ts'o } 54512035e776STheodore Ts'o 54522035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 54532035e776STheodore Ts'o { 54542035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 54552035e776STheodore Ts'o return 0; 54562035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54572035e776STheodore Ts'o return 1; 54582035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 54592035e776STheodore Ts'o return 0; 54602035e776STheodore Ts'o return 1; 54612035e776STheodore Ts'o } 546224b58424STheodore Ts'o #else 546324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 546424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 54652035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 546624b58424STheodore Ts'o #endif 546724b58424STheodore Ts'o 546837f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 546924b58424STheodore Ts'o static inline void register_as_ext3(void) 547024b58424STheodore Ts'o { 547124b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 547224b58424STheodore Ts'o if (err) 547324b58424STheodore Ts'o printk(KERN_WARNING 547424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 547524b58424STheodore Ts'o } 547624b58424STheodore Ts'o 547724b58424STheodore Ts'o static inline void unregister_as_ext3(void) 547824b58424STheodore Ts'o { 547924b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 548024b58424STheodore Ts'o } 54812035e776STheodore Ts'o 54822035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 54832035e776STheodore Ts'o { 54842035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 54852035e776STheodore Ts'o return 0; 54862035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 54872035e776STheodore Ts'o return 0; 54882035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54892035e776STheodore Ts'o return 1; 54902035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 54912035e776STheodore Ts'o return 0; 54922035e776STheodore Ts'o return 1; 54932035e776STheodore Ts'o } 549424b58424STheodore Ts'o #else 549524b58424STheodore Ts'o static inline void register_as_ext3(void) { } 549624b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 54972035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 549824b58424STheodore Ts'o #endif 549924b58424STheodore Ts'o 550003010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5501ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 550203010a33STheodore Ts'o .name = "ext4", 5503152a0836SAl Viro .mount = ext4_mount, 5504ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5505ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5506ac27a0ecSDave Kleikamp }; 55077f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5508ac27a0ecSDave Kleikamp 55098f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5510857ac889SLukas Czerner { 5511857ac889SLukas Czerner struct ext4_features *ef; 5512857ac889SLukas Czerner int ret = -ENOMEM; 5513857ac889SLukas Czerner 5514857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5515857ac889SLukas Czerner if (!ef) 5516857ac889SLukas Czerner goto out; 5517857ac889SLukas Czerner 5518857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5519857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5520857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5521857ac889SLukas Czerner "features"); 5522857ac889SLukas Czerner if (ret) { 5523857ac889SLukas Czerner kfree(ef); 5524857ac889SLukas Czerner goto out; 5525857ac889SLukas Czerner } 5526857ac889SLukas Czerner 5527857ac889SLukas Czerner ext4_feat = ef; 5528857ac889SLukas Czerner ret = 0; 5529857ac889SLukas Czerner out: 5530857ac889SLukas Czerner return ret; 5531857ac889SLukas Czerner } 5532857ac889SLukas Czerner 55338f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 55348f021222SLukas Czerner { 55358f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 55368f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 55378f021222SLukas Czerner kfree(ext4_feat); 55388f021222SLukas Czerner } 55398f021222SLukas Czerner 5540e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5541e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5542e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5543e9e3bcecSEric Sandeen 55445dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5545ac27a0ecSDave Kleikamp { 5546e9e3bcecSEric Sandeen int i, err; 5547c9de560dSAlex Tomas 554807c0c5d8SAl Viro ext4_li_info = NULL; 554907c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 555007c0c5d8SAl Viro 55519a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 555212e9b892SDmitry Monakhov ext4_check_flag_values(); 5553e9e3bcecSEric Sandeen 5554e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5555e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5556e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5557e9e3bcecSEric Sandeen } 5558e9e3bcecSEric Sandeen 555951865fdaSZheng Liu err = ext4_init_es(); 55606fd058f7STheodore Ts'o if (err) 55616fd058f7STheodore Ts'o return err; 556251865fdaSZheng Liu 556351865fdaSZheng Liu err = ext4_init_pageio(); 556451865fdaSZheng Liu if (err) 556551865fdaSZheng Liu goto out7; 556651865fdaSZheng Liu 55675dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5568bd2d0210STheodore Ts'o if (err) 5569d44651d0SFabrice Jouhaud goto out6; 55703197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 55710e376b1eSTheodore Ts'o if (!ext4_kset) { 55720e376b1eSTheodore Ts'o err = -ENOMEM; 5573dd68314cSTheodore Ts'o goto out5; 55740e376b1eSTheodore Ts'o } 5575d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5576857ac889SLukas Czerner 5577857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5578dd68314cSTheodore Ts'o if (err) 5579dd68314cSTheodore Ts'o goto out4; 5580857ac889SLukas Czerner 55815dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5582ac27a0ecSDave Kleikamp if (err) 5583c9de560dSAlex Tomas goto out2; 55849c191f70ST Makphaibulchoke else 55859c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5586ac27a0ecSDave Kleikamp err = init_inodecache(); 5587ac27a0ecSDave Kleikamp if (err) 5588ac27a0ecSDave Kleikamp goto out1; 558924b58424STheodore Ts'o register_as_ext3(); 55902035e776STheodore Ts'o register_as_ext2(); 559103010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5592ac27a0ecSDave Kleikamp if (err) 5593ac27a0ecSDave Kleikamp goto out; 5594bfff6873SLukas Czerner 5595ac27a0ecSDave Kleikamp return 0; 5596ac27a0ecSDave Kleikamp out: 559724b58424STheodore Ts'o unregister_as_ext2(); 559824b58424STheodore Ts'o unregister_as_ext3(); 5599ac27a0ecSDave Kleikamp destroy_inodecache(); 5600ac27a0ecSDave Kleikamp out1: 56019c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 56025dabfc78STheodore Ts'o ext4_exit_mballoc(); 56039c191f70ST Makphaibulchoke out2: 56048f021222SLukas Czerner ext4_exit_feat_adverts(); 56056fd058f7STheodore Ts'o out4: 5606d44651d0SFabrice Jouhaud if (ext4_proc_root) 5607dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5608dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5609d44651d0SFabrice Jouhaud out5: 5610dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5611d44651d0SFabrice Jouhaud out6: 56125dabfc78STheodore Ts'o ext4_exit_pageio(); 561351865fdaSZheng Liu out7: 561451865fdaSZheng Liu ext4_exit_es(); 561551865fdaSZheng Liu 5616ac27a0ecSDave Kleikamp return err; 5617ac27a0ecSDave Kleikamp } 5618ac27a0ecSDave Kleikamp 56195dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5620ac27a0ecSDave Kleikamp { 5621bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 562224b58424STheodore Ts'o unregister_as_ext2(); 562324b58424STheodore Ts'o unregister_as_ext3(); 562403010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5625ac27a0ecSDave Kleikamp destroy_inodecache(); 56265dabfc78STheodore Ts'o ext4_exit_mballoc(); 56278f021222SLukas Czerner ext4_exit_feat_adverts(); 56289f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 56293197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 56305dabfc78STheodore Ts'o ext4_exit_system_zone(); 56315dabfc78STheodore Ts'o ext4_exit_pageio(); 5632dd12ed14SEric Sandeen ext4_exit_es(); 5633ac27a0ecSDave Kleikamp } 5634ac27a0ecSDave Kleikamp 5635ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 563683982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5637ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 56385dabfc78STheodore Ts'o module_init(ext4_init_fs) 56395dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5640