1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 417abc52c2SDan Magenheimer #include <linux/cleancache.h> 42ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 43ac27a0ecSDave Kleikamp 44bfff6873SLukas Czerner #include <linux/kthread.h> 45bfff6873SLukas Czerner #include <linux/freezer.h> 46bfff6873SLukas Czerner 473dcf5451SChristoph Hellwig #include "ext4.h" 484a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 493dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 50ac27a0ecSDave Kleikamp #include "xattr.h" 51ac27a0ecSDave Kleikamp #include "acl.h" 523661d286STheodore Ts'o #include "mballoc.h" 53ac27a0ecSDave Kleikamp 549bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 559bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 569bffad1eSTheodore Ts'o 571f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 583197ebdbSTheodore Ts'o static struct kset *ext4_kset; 590b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 600b75a840SLukas Czerner static struct mutex ext4_li_mtx; 610b75a840SLukas Czerner static struct ext4_features *ext4_feat; 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); 84ac27a0ecSDave Kleikamp 852035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 862035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 872035e776STheodore Ts'o .owner = THIS_MODULE, 882035e776STheodore Ts'o .name = "ext2", 892035e776STheodore Ts'o .mount = ext4_mount, 902035e776STheodore Ts'o .kill_sb = kill_block_super, 912035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 922035e776STheodore Ts'o }; 932035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 942035e776STheodore Ts'o #else 952035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 962035e776STheodore Ts'o #endif 972035e776STheodore Ts'o 982035e776STheodore Ts'o 99ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 100ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 101ba69f9abSJan Kara .owner = THIS_MODULE, 102ba69f9abSJan Kara .name = "ext3", 103152a0836SAl Viro .mount = ext4_mount, 104ba69f9abSJan Kara .kill_sb = kill_block_super, 105ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 106ba69f9abSJan Kara }; 107ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 108ba69f9abSJan Kara #else 109ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 110ba69f9abSJan Kara #endif 111bd81d8eeSLaurent Vivier 112d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 113d25425f8SDarrick J. Wong struct ext4_super_block *es) 114d25425f8SDarrick J. Wong { 115d25425f8SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 116d25425f8SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 117d25425f8SDarrick J. Wong return 1; 118d25425f8SDarrick J. Wong 119d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 120d25425f8SDarrick J. Wong } 121d25425f8SDarrick J. Wong 122a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 123a9c47317SDarrick J. Wong struct ext4_super_block *es) 124a9c47317SDarrick J. Wong { 125a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 126a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 127a9c47317SDarrick J. Wong __u32 csum; 128a9c47317SDarrick J. Wong 129a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 130a9c47317SDarrick J. Wong 131a9c47317SDarrick J. Wong return cpu_to_le32(csum); 132a9c47317SDarrick J. Wong } 133a9c47317SDarrick J. Wong 134a9c47317SDarrick J. Wong int ext4_superblock_csum_verify(struct super_block *sb, 135a9c47317SDarrick J. Wong struct ext4_super_block *es) 136a9c47317SDarrick J. Wong { 137a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 138a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 139a9c47317SDarrick J. Wong return 1; 140a9c47317SDarrick J. Wong 141a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 142a9c47317SDarrick J. Wong } 143a9c47317SDarrick J. Wong 14406db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 145a9c47317SDarrick J. Wong { 14606db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 14706db49e6STheodore Ts'o 148a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 149a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 150a9c47317SDarrick J. Wong return; 151a9c47317SDarrick J. Wong 152a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 153a9c47317SDarrick J. Wong } 154a9c47317SDarrick J. Wong 1559933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1569933fc0aSTheodore Ts'o { 1579933fc0aSTheodore Ts'o void *ret; 1589933fc0aSTheodore Ts'o 1599933fc0aSTheodore Ts'o ret = kmalloc(size, flags); 1609933fc0aSTheodore Ts'o if (!ret) 1619933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1629933fc0aSTheodore Ts'o return ret; 1639933fc0aSTheodore Ts'o } 1649933fc0aSTheodore Ts'o 1659933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1669933fc0aSTheodore Ts'o { 1679933fc0aSTheodore Ts'o void *ret; 1689933fc0aSTheodore Ts'o 169db9481c0SMathias Krause ret = kzalloc(size, flags); 1709933fc0aSTheodore Ts'o if (!ret) 1719933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1729933fc0aSTheodore Ts'o return ret; 1739933fc0aSTheodore Ts'o } 1749933fc0aSTheodore Ts'o 1759933fc0aSTheodore Ts'o void ext4_kvfree(void *ptr) 1769933fc0aSTheodore Ts'o { 1779933fc0aSTheodore Ts'o if (is_vmalloc_addr(ptr)) 1789933fc0aSTheodore Ts'o vfree(ptr); 1799933fc0aSTheodore Ts'o else 1809933fc0aSTheodore Ts'o kfree(ptr); 1819933fc0aSTheodore Ts'o 1829933fc0aSTheodore Ts'o } 1839933fc0aSTheodore Ts'o 1848fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1858fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 186bd81d8eeSLaurent Vivier { 1873a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1888fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1898fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 190bd81d8eeSLaurent Vivier } 191bd81d8eeSLaurent Vivier 1928fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1938fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 194bd81d8eeSLaurent Vivier { 1955272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1968fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1978fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 198bd81d8eeSLaurent Vivier } 199bd81d8eeSLaurent Vivier 2008fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2018fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 202bd81d8eeSLaurent Vivier { 2035272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2048fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2058fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 206bd81d8eeSLaurent Vivier } 207bd81d8eeSLaurent Vivier 208021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 209560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 210560671a0SAneesh Kumar K.V { 211560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 212560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 213560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 214560671a0SAneesh Kumar K.V } 215560671a0SAneesh Kumar K.V 216560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 217560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 218560671a0SAneesh Kumar K.V { 219560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 220560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 221560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 222560671a0SAneesh Kumar K.V } 223560671a0SAneesh Kumar K.V 224560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 225560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 226560671a0SAneesh Kumar K.V { 227560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 228560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 229560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 230560671a0SAneesh Kumar K.V } 231560671a0SAneesh Kumar K.V 232560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 233560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 234560671a0SAneesh Kumar K.V { 235560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 236560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 237560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 238560671a0SAneesh Kumar K.V } 239560671a0SAneesh Kumar K.V 2408fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2418fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 242bd81d8eeSLaurent Vivier { 2433a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2448fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2458fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 246bd81d8eeSLaurent Vivier } 247bd81d8eeSLaurent Vivier 2488fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2498fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 250bd81d8eeSLaurent Vivier { 2515272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2528fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2538fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 254bd81d8eeSLaurent Vivier } 255bd81d8eeSLaurent Vivier 2568fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2578fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 258bd81d8eeSLaurent Vivier { 2595272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2608fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2618fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 262bd81d8eeSLaurent Vivier } 263bd81d8eeSLaurent Vivier 264021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 265560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 266560671a0SAneesh Kumar K.V { 267560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 268560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 269560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 270560671a0SAneesh Kumar K.V } 271560671a0SAneesh Kumar K.V 272560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 273560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 274560671a0SAneesh Kumar K.V { 275560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 276560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 277560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 278560671a0SAneesh Kumar K.V } 279560671a0SAneesh Kumar K.V 280560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 281560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 282560671a0SAneesh Kumar K.V { 283560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 284560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 285560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 286560671a0SAneesh Kumar K.V } 287560671a0SAneesh Kumar K.V 288560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 289560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 290560671a0SAneesh Kumar K.V { 291560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 292560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 293560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 294560671a0SAneesh Kumar K.V } 295560671a0SAneesh Kumar K.V 296d3d1faf6SCurt Wohlgemuth 2971c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 2981c13d5c0STheodore Ts'o unsigned int line) 2991c13d5c0STheodore Ts'o { 3001c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3011c13d5c0STheodore Ts'o 3021c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3031c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3041c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3051c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3061c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3071c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3081c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3091c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3101c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3111c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3121c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3131c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3141c13d5c0STheodore Ts'o } 31566e61a9eSTheodore Ts'o /* 31666e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 31766e61a9eSTheodore Ts'o * started already 31866e61a9eSTheodore Ts'o */ 31966e61a9eSTheodore Ts'o if (!es->s_error_count) 32066e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 321ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3221c13d5c0STheodore Ts'o } 3231c13d5c0STheodore Ts'o 3241c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3251c13d5c0STheodore Ts'o unsigned int line) 3261c13d5c0STheodore Ts'o { 3271c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3281c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3291c13d5c0STheodore Ts'o } 3301c13d5c0STheodore Ts'o 3317c2e7087STheodore Ts'o /* 3327c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 3337c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 3347c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 3357c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 3367c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 3377c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 3387c2e7087STheodore Ts'o */ 3397c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 3407c2e7087STheodore Ts'o { 3417c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 3427c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 3437c2e7087STheodore Ts'o 3447c2e7087STheodore Ts'o return bdi->dev == NULL; 3457c2e7087STheodore Ts'o } 3467c2e7087STheodore Ts'o 34718aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 34818aadd47SBobi Jam { 34918aadd47SBobi Jam struct super_block *sb = journal->j_private; 35018aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 35118aadd47SBobi Jam int error = is_journal_aborted(journal); 35218aadd47SBobi Jam struct ext4_journal_cb_entry *jce, *tmp; 35318aadd47SBobi Jam 35418aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 35518aadd47SBobi Jam list_for_each_entry_safe(jce, tmp, &txn->t_private_list, jce_list) { 35618aadd47SBobi Jam list_del_init(&jce->jce_list); 35718aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 35818aadd47SBobi Jam jce->jce_func(sb, jce, error); 35918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 36018aadd47SBobi Jam } 36118aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 36218aadd47SBobi Jam } 3631c13d5c0STheodore Ts'o 364ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 365ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 366ac27a0ecSDave Kleikamp * 367ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 368617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 369ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 370ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 371ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 372ac27a0ecSDave Kleikamp * write out the superblock safely. 373ac27a0ecSDave Kleikamp * 374dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 375d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 376ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 377ac27a0ecSDave Kleikamp */ 378ac27a0ecSDave Kleikamp 379617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 380ac27a0ecSDave Kleikamp { 381ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 382ac27a0ecSDave Kleikamp return; 383ac27a0ecSDave Kleikamp 384ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 385617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 386ac27a0ecSDave Kleikamp 3874ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 388ac27a0ecSDave Kleikamp if (journal) 389dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 390ac27a0ecSDave Kleikamp } 391ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 392b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 393ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 394ac27a0ecSDave Kleikamp } 395ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 396617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 397ac27a0ecSDave Kleikamp sb->s_id); 398ac27a0ecSDave Kleikamp } 399ac27a0ecSDave Kleikamp 40012062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 401c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 402ac27a0ecSDave Kleikamp { 4030ff2ea7dSJoe Perches struct va_format vaf; 404ac27a0ecSDave Kleikamp va_list args; 405ac27a0ecSDave Kleikamp 406ac27a0ecSDave Kleikamp va_start(args, fmt); 4070ff2ea7dSJoe Perches vaf.fmt = fmt; 4080ff2ea7dSJoe Perches vaf.va = &args; 4090ff2ea7dSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4100ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 411ac27a0ecSDave Kleikamp va_end(args); 412f3fc0210STheodore Ts'o save_error_info(sb, function, line); 413ac27a0ecSDave Kleikamp 414617ba13bSMingming Cao ext4_handle_error(sb); 415ac27a0ecSDave Kleikamp } 416ac27a0ecSDave Kleikamp 417c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 418c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 419273df556SFrank Mayhar const char *fmt, ...) 420273df556SFrank Mayhar { 421273df556SFrank Mayhar va_list args; 422f7c21177STheodore Ts'o struct va_format vaf; 4231c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 424273df556SFrank Mayhar 4251c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4261c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 4271c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 428273df556SFrank Mayhar va_start(args, fmt); 429f7c21177STheodore Ts'o vaf.fmt = fmt; 430f7c21177STheodore Ts'o vaf.va = &args; 431c398eda0STheodore Ts'o if (block) 432d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 433d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 434d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 435d9ee81daSJoe Perches block, current->comm, &vaf); 436d9ee81daSJoe Perches else 437d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 438d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 439d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 440d9ee81daSJoe Perches current->comm, &vaf); 441273df556SFrank Mayhar va_end(args); 442273df556SFrank Mayhar 443273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 444273df556SFrank Mayhar } 445273df556SFrank Mayhar 446c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 447f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 448f7c21177STheodore Ts'o const char *fmt, ...) 449273df556SFrank Mayhar { 450273df556SFrank Mayhar va_list args; 451f7c21177STheodore Ts'o struct va_format vaf; 4521c13d5c0STheodore Ts'o struct ext4_super_block *es; 453273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 454273df556SFrank Mayhar char pathname[80], *path; 455273df556SFrank Mayhar 4561c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4571c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4581c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 459273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 460f9a62d09SDan Carpenter if (IS_ERR(path)) 461273df556SFrank Mayhar path = "(unknown)"; 462f7c21177STheodore Ts'o va_start(args, fmt); 463f7c21177STheodore Ts'o vaf.fmt = fmt; 464f7c21177STheodore Ts'o vaf.va = &args; 465d9ee81daSJoe Perches if (block) 466d9ee81daSJoe Perches printk(KERN_CRIT 467d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 468d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 469d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 470d9ee81daSJoe Perches block, current->comm, path, &vaf); 471d9ee81daSJoe Perches else 472d9ee81daSJoe Perches printk(KERN_CRIT 473d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 474d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 475d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 476d9ee81daSJoe Perches current->comm, path, &vaf); 477273df556SFrank Mayhar va_end(args); 478273df556SFrank Mayhar 479273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 480273df556SFrank Mayhar } 481273df556SFrank Mayhar 482722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 483ac27a0ecSDave Kleikamp char nbuf[16]) 484ac27a0ecSDave Kleikamp { 485ac27a0ecSDave Kleikamp char *errstr = NULL; 486ac27a0ecSDave Kleikamp 487ac27a0ecSDave Kleikamp switch (errno) { 488ac27a0ecSDave Kleikamp case -EIO: 489ac27a0ecSDave Kleikamp errstr = "IO failure"; 490ac27a0ecSDave Kleikamp break; 491ac27a0ecSDave Kleikamp case -ENOMEM: 492ac27a0ecSDave Kleikamp errstr = "Out of memory"; 493ac27a0ecSDave Kleikamp break; 494ac27a0ecSDave Kleikamp case -EROFS: 49578f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 49678f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 497ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 498ac27a0ecSDave Kleikamp else 499ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 500ac27a0ecSDave Kleikamp break; 501ac27a0ecSDave Kleikamp default: 502ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 503ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 504ac27a0ecSDave Kleikamp * NULL. */ 505ac27a0ecSDave Kleikamp if (nbuf) { 506ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 507ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 508ac27a0ecSDave Kleikamp errstr = nbuf; 509ac27a0ecSDave Kleikamp } 510ac27a0ecSDave Kleikamp break; 511ac27a0ecSDave Kleikamp } 512ac27a0ecSDave Kleikamp 513ac27a0ecSDave Kleikamp return errstr; 514ac27a0ecSDave Kleikamp } 515ac27a0ecSDave Kleikamp 516617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 517ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 518ac27a0ecSDave Kleikamp 519c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 520c398eda0STheodore Ts'o unsigned int line, int errno) 521ac27a0ecSDave Kleikamp { 522ac27a0ecSDave Kleikamp char nbuf[16]; 523ac27a0ecSDave Kleikamp const char *errstr; 524ac27a0ecSDave Kleikamp 525ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 526ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 527ac27a0ecSDave Kleikamp * an error. */ 528ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 529ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 530ac27a0ecSDave Kleikamp return; 531ac27a0ecSDave Kleikamp 532617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 533c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 534c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 5351c13d5c0STheodore Ts'o save_error_info(sb, function, line); 536ac27a0ecSDave Kleikamp 537617ba13bSMingming Cao ext4_handle_error(sb); 538ac27a0ecSDave Kleikamp } 539ac27a0ecSDave Kleikamp 540ac27a0ecSDave Kleikamp /* 541617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 542ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 543ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 544ac27a0ecSDave Kleikamp * 545ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 546ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 547ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 548ac27a0ecSDave Kleikamp */ 549ac27a0ecSDave Kleikamp 550c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 551c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 552ac27a0ecSDave Kleikamp { 553ac27a0ecSDave Kleikamp va_list args; 554ac27a0ecSDave Kleikamp 5551c13d5c0STheodore Ts'o save_error_info(sb, function, line); 556ac27a0ecSDave Kleikamp va_start(args, fmt); 557c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 558c398eda0STheodore Ts'o function, line); 559ac27a0ecSDave Kleikamp vprintk(fmt, args); 560ac27a0ecSDave Kleikamp printk("\n"); 561ac27a0ecSDave Kleikamp va_end(args); 562ac27a0ecSDave Kleikamp 5631c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 564b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 565ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 5664ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 567ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 568dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5691c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5701c13d5c0STheodore Ts'o } 5711c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5721c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 573ac27a0ecSDave Kleikamp } 574ac27a0ecSDave Kleikamp 5750ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 576b31e1552SEric Sandeen { 5770ff2ea7dSJoe Perches struct va_format vaf; 578b31e1552SEric Sandeen va_list args; 579b31e1552SEric Sandeen 580b31e1552SEric Sandeen va_start(args, fmt); 5810ff2ea7dSJoe Perches vaf.fmt = fmt; 5820ff2ea7dSJoe Perches vaf.va = &args; 5830ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 584b31e1552SEric Sandeen va_end(args); 585b31e1552SEric Sandeen } 586b31e1552SEric Sandeen 58712062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 588c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 589ac27a0ecSDave Kleikamp { 5900ff2ea7dSJoe Perches struct va_format vaf; 591ac27a0ecSDave Kleikamp va_list args; 592ac27a0ecSDave Kleikamp 593ac27a0ecSDave Kleikamp va_start(args, fmt); 5940ff2ea7dSJoe Perches vaf.fmt = fmt; 5950ff2ea7dSJoe Perches vaf.va = &args; 5960ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 5970ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 598ac27a0ecSDave Kleikamp va_end(args); 599ac27a0ecSDave Kleikamp } 600ac27a0ecSDave Kleikamp 601e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 602e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 603e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 604e29136f8STheodore Ts'o const char *fmt, ...) 6055d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6065d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6075d1b1b3fSAneesh Kumar K.V { 6080ff2ea7dSJoe Perches struct va_format vaf; 6095d1b1b3fSAneesh Kumar K.V va_list args; 6105d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6115d1b1b3fSAneesh Kumar K.V 6121c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6131c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6141c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6150ff2ea7dSJoe Perches 6165d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6170ff2ea7dSJoe Perches 6180ff2ea7dSJoe Perches vaf.fmt = fmt; 6190ff2ea7dSJoe Perches vaf.va = &args; 62021149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 621e29136f8STheodore Ts'o sb->s_id, function, line, grp); 622e29136f8STheodore Ts'o if (ino) 6230ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 624e29136f8STheodore Ts'o if (block) 6250ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 6260ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6275d1b1b3fSAneesh Kumar K.V va_end(args); 6285d1b1b3fSAneesh Kumar K.V 6295d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 630e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6315d1b1b3fSAneesh Kumar K.V return; 6325d1b1b3fSAneesh Kumar K.V } 6331c13d5c0STheodore Ts'o 6345d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6355d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6365d1b1b3fSAneesh Kumar K.V /* 6375d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6385d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6395d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6405d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6415d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 64225985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 6435d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6445d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6455d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6465d1b1b3fSAneesh Kumar K.V */ 6475d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6485d1b1b3fSAneesh Kumar K.V return; 6495d1b1b3fSAneesh Kumar K.V } 6505d1b1b3fSAneesh Kumar K.V 651617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 652ac27a0ecSDave Kleikamp { 653617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 654ac27a0ecSDave Kleikamp 655617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 656ac27a0ecSDave Kleikamp return; 657ac27a0ecSDave Kleikamp 65812062dddSEric Sandeen ext4_warning(sb, 659ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 660ac27a0ecSDave Kleikamp "running e2fsck is recommended", 661617ba13bSMingming Cao EXT4_DYNAMIC_REV); 662ac27a0ecSDave Kleikamp 663617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 664617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 665617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 666ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 667ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 668ac27a0ecSDave Kleikamp 669ac27a0ecSDave Kleikamp /* 670ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 671ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 672ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 673ac27a0ecSDave Kleikamp */ 674ac27a0ecSDave Kleikamp } 675ac27a0ecSDave Kleikamp 676ac27a0ecSDave Kleikamp /* 677ac27a0ecSDave Kleikamp * Open the external journal device 678ac27a0ecSDave Kleikamp */ 679b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 680ac27a0ecSDave Kleikamp { 681ac27a0ecSDave Kleikamp struct block_device *bdev; 682ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 683ac27a0ecSDave Kleikamp 684d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 685ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 686ac27a0ecSDave Kleikamp goto fail; 687ac27a0ecSDave Kleikamp return bdev; 688ac27a0ecSDave Kleikamp 689ac27a0ecSDave Kleikamp fail: 690b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 691ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 692ac27a0ecSDave Kleikamp return NULL; 693ac27a0ecSDave Kleikamp } 694ac27a0ecSDave Kleikamp 695ac27a0ecSDave Kleikamp /* 696ac27a0ecSDave Kleikamp * Release the journal device 697ac27a0ecSDave Kleikamp */ 698617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 699ac27a0ecSDave Kleikamp { 700e525fd89STejun Heo return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 701ac27a0ecSDave Kleikamp } 702ac27a0ecSDave Kleikamp 703617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 704ac27a0ecSDave Kleikamp { 705ac27a0ecSDave Kleikamp struct block_device *bdev; 706ac27a0ecSDave Kleikamp int ret = -ENODEV; 707ac27a0ecSDave Kleikamp 708ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 709ac27a0ecSDave Kleikamp if (bdev) { 710617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 711ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 712ac27a0ecSDave Kleikamp } 713ac27a0ecSDave Kleikamp return ret; 714ac27a0ecSDave Kleikamp } 715ac27a0ecSDave Kleikamp 716ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 717ac27a0ecSDave Kleikamp { 718617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 719ac27a0ecSDave Kleikamp } 720ac27a0ecSDave Kleikamp 721617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 722ac27a0ecSDave Kleikamp { 723ac27a0ecSDave Kleikamp struct list_head *l; 724ac27a0ecSDave Kleikamp 725b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 726ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 727ac27a0ecSDave Kleikamp 728ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 729ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 730ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 731ac27a0ecSDave Kleikamp printk(KERN_ERR " " 732ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 733ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 734ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 735ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 736ac27a0ecSDave Kleikamp } 737ac27a0ecSDave Kleikamp } 738ac27a0ecSDave Kleikamp 739617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 740ac27a0ecSDave Kleikamp { 741617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 742617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 743ef2cabf7SHidehiro Kawai int i, err; 744ac27a0ecSDave Kleikamp 745857ac889SLukas Czerner ext4_unregister_li_request(sb); 746e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 747e0ccfd95SChristoph Hellwig 7484c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 7494c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 7504c0425ffSMingming Cao 7510390131bSFrank Mayhar if (sbi->s_journal) { 752ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 75347b4a50bSJan Kara sbi->s_journal = NULL; 754ef2cabf7SHidehiro Kawai if (err < 0) 755c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7560390131bSFrank Mayhar } 757d4edac31SJosef Bacik 75874cd15cdSZheng Liu ext4_es_unregister_shrinker(sb); 759a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 760d4edac31SJosef Bacik ext4_release_system_zone(sb); 761d4edac31SJosef Bacik ext4_mb_release(sb); 762d4edac31SJosef Bacik ext4_ext_release(sb); 763d4edac31SJosef Bacik ext4_xattr_put_super(sb); 764d4edac31SJosef Bacik 765ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 766617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 767ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 768ac27a0ecSDave Kleikamp } 76958c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 770a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 771a8e25a83SArtem Bityutskiy 772240799cdSTheodore Ts'o if (sbi->s_proc) { 77366acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 7749f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 775240799cdSTheodore Ts'o } 7763197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 777ac27a0ecSDave Kleikamp 778ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 779ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 780f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 7819933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 78257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 783ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 784ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 78557042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 7861ac6466fSTheodore Ts'o percpu_counter_destroy(&sbi->s_extent_cache_cnt); 787ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 788ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 789ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 790ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 791ac27a0ecSDave Kleikamp #endif 792ac27a0ecSDave Kleikamp 793ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 794ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 795ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 796ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 797ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 798ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 799ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 800ac27a0ecSDave Kleikamp 801f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 802ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 803ac27a0ecSDave Kleikamp /* 804ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 805ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 806ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 807ac27a0ecSDave Kleikamp */ 808ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 809f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 810617ba13bSMingming Cao ext4_blkdev_remove(sbi); 811ac27a0ecSDave Kleikamp } 812c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 813c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 814ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8153197ebdbSTheodore Ts'o /* 8163197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8173197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8183197ebdbSTheodore Ts'o */ 8193197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8203197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 8210441984aSDarrick J. Wong if (sbi->s_chksum_driver) 8220441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 823705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 824ac27a0ecSDave Kleikamp kfree(sbi); 825ac27a0ecSDave Kleikamp } 826ac27a0ecSDave Kleikamp 827e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 828ac27a0ecSDave Kleikamp 829ac27a0ecSDave Kleikamp /* 830ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 831ac27a0ecSDave Kleikamp */ 832617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 833ac27a0ecSDave Kleikamp { 834617ba13bSMingming Cao struct ext4_inode_info *ei; 835ac27a0ecSDave Kleikamp 836e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 837ac27a0ecSDave Kleikamp if (!ei) 838ac27a0ecSDave Kleikamp return NULL; 8390b8e58a1SAndreas Dilger 840ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 841c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 842c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8439a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 8449a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 84574cd15cdSZheng Liu INIT_LIST_HEAD(&ei->i_es_lru); 84674cd15cdSZheng Liu ei->i_es_lru_nr = 0; 847d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 848d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 849d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8509d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 8517e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 852d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 853a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 854a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 855a9e7f447SDmitry Monakhov #endif 8568aefcd55STheodore Ts'o ei->jinode = NULL; 857c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 858744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 859b436b9beSJan Kara ei->i_sync_tid = 0; 860b436b9beSJan Kara ei->i_datasync_tid = 0; 861f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 862e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 86384c17543SJan Kara INIT_WORK(&ei->i_unwritten_work, ext4_end_io_work); 8640b8e58a1SAndreas Dilger 865ac27a0ecSDave Kleikamp return &ei->vfs_inode; 866ac27a0ecSDave Kleikamp } 867ac27a0ecSDave Kleikamp 8687ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 8697ff9c073STheodore Ts'o { 8707ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 8717ff9c073STheodore Ts'o 8727ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 8737ff9c073STheodore Ts'o return drop; 8747ff9c073STheodore Ts'o } 8757ff9c073STheodore Ts'o 876fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 877fa0d7e3dSNick Piggin { 878fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 879fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 880fa0d7e3dSNick Piggin } 881fa0d7e3dSNick Piggin 882617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 883ac27a0ecSDave Kleikamp { 8849f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 885b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 886b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 887b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 8889f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 8899f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 8909f7dd93dSVasily Averin true); 8919f7dd93dSVasily Averin dump_stack(); 8929f7dd93dSVasily Averin } 893fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 894ac27a0ecSDave Kleikamp } 895ac27a0ecSDave Kleikamp 89651cc5068SAlexey Dobriyan static void init_once(void *foo) 897ac27a0ecSDave Kleikamp { 898617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 899ac27a0ecSDave Kleikamp 900ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 901ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9020e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 903ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 904ac27a0ecSDave Kleikamp } 905ac27a0ecSDave Kleikamp 906ac27a0ecSDave Kleikamp static int init_inodecache(void) 907ac27a0ecSDave Kleikamp { 908617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 909617ba13bSMingming Cao sizeof(struct ext4_inode_info), 910ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 911ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 91220c2df83SPaul Mundt init_once); 913617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 914ac27a0ecSDave Kleikamp return -ENOMEM; 915ac27a0ecSDave Kleikamp return 0; 916ac27a0ecSDave Kleikamp } 917ac27a0ecSDave Kleikamp 918ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 919ac27a0ecSDave Kleikamp { 9208c0a8537SKirill A. Shutemov /* 9218c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 9228c0a8537SKirill A. Shutemov * destroy cache. 9238c0a8537SKirill A. Shutemov */ 9248c0a8537SKirill A. Shutemov rcu_barrier(); 925617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 926ac27a0ecSDave Kleikamp } 927ac27a0ecSDave Kleikamp 9280930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 929ac27a0ecSDave Kleikamp { 9300930fcc1SAl Viro invalidate_inode_buffers(inode); 931dbd5768fSJan Kara clear_inode(inode); 9329f754758SChristoph Hellwig dquot_drop(inode); 933c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 93451865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 93574cd15cdSZheng Liu ext4_es_lru_del(inode); 9368aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9378aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9388aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9398aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9408aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9418aefcd55STheodore Ts'o } 942ac27a0ecSDave Kleikamp } 943ac27a0ecSDave Kleikamp 9441b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9451b961ac0SChristoph Hellwig u64 ino, u32 generation) 946ac27a0ecSDave Kleikamp { 947ac27a0ecSDave Kleikamp struct inode *inode; 948ac27a0ecSDave Kleikamp 949617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 950ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 951617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 952ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 953ac27a0ecSDave Kleikamp 954ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 955ac27a0ecSDave Kleikamp * 956617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 957ac27a0ecSDave Kleikamp * deleted, so we should be safe. 958ac27a0ecSDave Kleikamp * 959ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 960ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 961ac27a0ecSDave Kleikamp */ 9621d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 9631d1fe1eeSDavid Howells if (IS_ERR(inode)) 9641d1fe1eeSDavid Howells return ERR_CAST(inode); 9651d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 966ac27a0ecSDave Kleikamp iput(inode); 967ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 968ac27a0ecSDave Kleikamp } 9691b961ac0SChristoph Hellwig 9701b961ac0SChristoph Hellwig return inode; 971ac27a0ecSDave Kleikamp } 9721b961ac0SChristoph Hellwig 9731b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 9741b961ac0SChristoph Hellwig int fh_len, int fh_type) 9751b961ac0SChristoph Hellwig { 9761b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 9771b961ac0SChristoph Hellwig ext4_nfs_get_inode); 9781b961ac0SChristoph Hellwig } 9791b961ac0SChristoph Hellwig 9801b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 9811b961ac0SChristoph Hellwig int fh_len, int fh_type) 9821b961ac0SChristoph Hellwig { 9831b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 9841b961ac0SChristoph Hellwig ext4_nfs_get_inode); 985ac27a0ecSDave Kleikamp } 986ac27a0ecSDave Kleikamp 987c39a7f84SToshiyuki Okajima /* 988c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 989c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 990c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 991c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 992c39a7f84SToshiyuki Okajima */ 9930b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 9940b8e58a1SAndreas Dilger gfp_t wait) 995c39a7f84SToshiyuki Okajima { 996c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 997c39a7f84SToshiyuki Okajima 998c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 999c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1000c39a7f84SToshiyuki Okajima return 0; 1001c39a7f84SToshiyuki Okajima if (journal) 1002c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1003c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1004c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1005c39a7f84SToshiyuki Okajima } 1006c39a7f84SToshiyuki Okajima 1007ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1008ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1009ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1010ac27a0ecSDave Kleikamp 1011617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1012617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1013617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1014617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1015617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10166f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1017f00c9e44SJan Kara struct path *path); 10187c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 10197c319d32SAditya Kali int format_id); 1020ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 10217c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type); 1022617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1023617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1024ac27a0ecSDave Kleikamp size_t len, loff_t off); 1025617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1026ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 10277c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 10287c319d32SAditya Kali unsigned int flags); 10297c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1030ac27a0ecSDave Kleikamp 103161e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 103260e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1033617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1034617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1035617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1036617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1037a5b5ee32SJan Kara .write_info = ext4_write_info, 1038a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1039a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1040ac27a0ecSDave Kleikamp }; 1041ac27a0ecSDave Kleikamp 10420d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1043617ba13bSMingming Cao .quota_on = ext4_quota_on, 1044ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1045287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1046287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1047287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1048287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1049287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1050ac27a0ecSDave Kleikamp }; 10517c319d32SAditya Kali 10527c319d32SAditya Kali static const struct quotactl_ops ext4_qctl_sysfile_operations = { 10537c319d32SAditya Kali .quota_on_meta = ext4_quota_on_sysfile, 10547c319d32SAditya Kali .quota_off = ext4_quota_off_sysfile, 10557c319d32SAditya Kali .quota_sync = dquot_quota_sync, 10567c319d32SAditya Kali .get_info = dquot_get_dqinfo, 10577c319d32SAditya Kali .set_info = dquot_set_dqinfo, 10587c319d32SAditya Kali .get_dqblk = dquot_get_dqblk, 10597c319d32SAditya Kali .set_dqblk = dquot_set_dqblk 10607c319d32SAditya Kali }; 1061ac27a0ecSDave Kleikamp #endif 1062ac27a0ecSDave Kleikamp 1063ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1064617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1065617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1066617ba13bSMingming Cao .write_inode = ext4_write_inode, 1067617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 10687ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 10690930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1070617ba13bSMingming Cao .put_super = ext4_put_super, 1071617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1072c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1073c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1074617ba13bSMingming Cao .statfs = ext4_statfs, 1075617ba13bSMingming Cao .remount_fs = ext4_remount, 1076617ba13bSMingming Cao .show_options = ext4_show_options, 1077ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1078617ba13bSMingming Cao .quota_read = ext4_quota_read, 1079617ba13bSMingming Cao .quota_write = ext4_quota_write, 1080ac27a0ecSDave Kleikamp #endif 1081c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1082ac27a0ecSDave Kleikamp }; 1083ac27a0ecSDave Kleikamp 10849ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 10859ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 10869ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 10879ca92389STheodore Ts'o .write_inode = ext4_write_inode, 10889ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 10897ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 10900930fcc1SAl Viro .evict_inode = ext4_evict_inode, 10919ca92389STheodore Ts'o .put_super = ext4_put_super, 10929ca92389STheodore Ts'o .statfs = ext4_statfs, 10939ca92389STheodore Ts'o .remount_fs = ext4_remount, 10949ca92389STheodore Ts'o .show_options = ext4_show_options, 10959ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 10969ca92389STheodore Ts'o .quota_read = ext4_quota_read, 10979ca92389STheodore Ts'o .quota_write = ext4_quota_write, 10989ca92389STheodore Ts'o #endif 10999ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 11009ca92389STheodore Ts'o }; 11019ca92389STheodore Ts'o 110239655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11031b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11041b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1105617ba13bSMingming Cao .get_parent = ext4_get_parent, 1106ac27a0ecSDave Kleikamp }; 1107ac27a0ecSDave Kleikamp 1108ac27a0ecSDave Kleikamp enum { 1109ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1110ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 111172578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1112ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 111372578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 111430773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 111543e625d8SEric Sandeen Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, 1116ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1117296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1118ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11195a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1120ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1121661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 11221449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 11231449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11245328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1125744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1126fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1127df981d03STheodore Ts'o Opt_max_dir_size_kb, 1128ac27a0ecSDave Kleikamp }; 1129ac27a0ecSDave Kleikamp 1130a447c093SSteven Whitehouse static const match_table_t tokens = { 1131ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1132ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1133ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1134ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1135ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1136ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1137ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1138ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1139ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1140ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1141ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1142ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1143ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1144ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 114572578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 114672578c33STheodore Ts'o {Opt_removed, "orlov"}, 1147ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1148ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1149ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1150ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1151e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11525a916be1STheodore Ts'o {Opt_noload, "noload"}, 115372578c33STheodore Ts'o {Opt_removed, "nobh"}, 115472578c33STheodore Ts'o {Opt_removed, "bh"}, 1155ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 115630773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 115730773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1158ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1159818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1160818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1161ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1162ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1163ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1164ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11655bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11665bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1167ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1168ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1169ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1170ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1171ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1172ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 11735a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1174ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1175ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1176ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1177ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1178ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 117906705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 118006705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 118125ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1182c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 118364769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1184dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 118536ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 118636ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 11876fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 11886fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1189240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1190b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1191afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 119206705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 119306705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1194744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1195744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 11965328e635SEric Sandeen {Opt_discard, "discard"}, 11975328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1198fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1199fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1200fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1201df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1202c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1203c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1204c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1205c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1206c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1207f3f12faaSJosef Bacik {Opt_err, NULL}, 1208ac27a0ecSDave Kleikamp }; 1209ac27a0ecSDave Kleikamp 1210617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1211ac27a0ecSDave Kleikamp { 1212617ba13bSMingming Cao ext4_fsblk_t sb_block; 1213ac27a0ecSDave Kleikamp char *options = (char *) *data; 1214ac27a0ecSDave Kleikamp 1215ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1216ac27a0ecSDave Kleikamp return 1; /* Default location */ 12170b8e58a1SAndreas Dilger 1218ac27a0ecSDave Kleikamp options += 3; 12190b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1220ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1221ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12224776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1223ac27a0ecSDave Kleikamp (char *) *data); 1224ac27a0ecSDave Kleikamp return 1; 1225ac27a0ecSDave Kleikamp } 1226ac27a0ecSDave Kleikamp if (*options == ',') 1227ac27a0ecSDave Kleikamp options++; 1228ac27a0ecSDave Kleikamp *data = (void *) options; 12290b8e58a1SAndreas Dilger 1230ac27a0ecSDave Kleikamp return sb_block; 1231ac27a0ecSDave Kleikamp } 1232ac27a0ecSDave Kleikamp 1233b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1234437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1235437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1236b3881f74STheodore Ts'o 123756c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 123856c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 123956c50f11SDmitry Monakhov { 124056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 124156c50f11SDmitry Monakhov char *qname; 124203dafb5fSChen Gang int ret = -1; 124356c50f11SDmitry Monakhov 124456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 124556c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 124656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 124756c50f11SDmitry Monakhov "Cannot change journaled " 124856c50f11SDmitry Monakhov "quota options when quota turned on"); 124957f73c2cSTheodore Ts'o return -1; 125056c50f11SDmitry Monakhov } 1251*262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1252*262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1253*262b4662SJan Kara "when QUOTA feature is enabled"); 1254*262b4662SJan Kara return -1; 1255*262b4662SJan Kara } 125656c50f11SDmitry Monakhov qname = match_strdup(args); 125756c50f11SDmitry Monakhov if (!qname) { 125856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 125956c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 126057f73c2cSTheodore Ts'o return -1; 126156c50f11SDmitry Monakhov } 126203dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 126303dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 126403dafb5fSChen Gang ret = 1; 126503dafb5fSChen Gang else 126656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 126703dafb5fSChen Gang "%s quota file already specified", 126803dafb5fSChen Gang QTYPE2NAME(qtype)); 126903dafb5fSChen Gang goto errout; 127056c50f11SDmitry Monakhov } 127103dafb5fSChen Gang if (strchr(qname, '/')) { 127256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127356c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 127403dafb5fSChen Gang goto errout; 127556c50f11SDmitry Monakhov } 127603dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1277fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 127856c50f11SDmitry Monakhov return 1; 127903dafb5fSChen Gang errout: 128003dafb5fSChen Gang kfree(qname); 128103dafb5fSChen Gang return ret; 128256c50f11SDmitry Monakhov } 128356c50f11SDmitry Monakhov 128456c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 128556c50f11SDmitry Monakhov { 128656c50f11SDmitry Monakhov 128756c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 128856c50f11SDmitry Monakhov 128956c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 129056c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 129156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 129256c50f11SDmitry Monakhov " when quota turned on"); 129357f73c2cSTheodore Ts'o return -1; 129456c50f11SDmitry Monakhov } 129503dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 129656c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 129756c50f11SDmitry Monakhov return 1; 129856c50f11SDmitry Monakhov } 129956c50f11SDmitry Monakhov #endif 130056c50f11SDmitry Monakhov 130126092bf5STheodore Ts'o #define MOPT_SET 0x0001 130226092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 130326092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 130426092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 130526092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 130626092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 130726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 130826092bf5STheodore Ts'o #define MOPT_Q 0 130926092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 131026092bf5STheodore Ts'o #else 131126092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 131226092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 131326092bf5STheodore Ts'o #endif 131426092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13158dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13168dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13178dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 131826092bf5STheodore Ts'o 131926092bf5STheodore Ts'o static const struct mount_opts { 132026092bf5STheodore Ts'o int token; 132126092bf5STheodore Ts'o int mount_opt; 132226092bf5STheodore Ts'o int flags; 132326092bf5STheodore Ts'o } ext4_mount_opts[] = { 132426092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 132526092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 132626092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 132726092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 132826092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 132926092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13308dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13318dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13328dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13338dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 133426092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 133526092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13368dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13378dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13388dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 13398dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR | MOPT_EXPLICIT}, 13408dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 13418dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 134226092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13438dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 13448dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13458dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 134626092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 134726092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 134826092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13498dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13508dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13518dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13528dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 135326092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 135426092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 135526092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 135626092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 135726092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 135826092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 135926092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 136026092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 136126092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 136226092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 136326092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 13640efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 13650efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 13660efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 13670efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 13688dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13698dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13708dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 13718dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 137226092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 137326092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 137426092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 137526092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 137626092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 137726092bf5STheodore Ts'o #else 137826092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 137926092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 138026092bf5STheodore Ts'o #endif 138126092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 138226092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 138326092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 138426092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 138526092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 138626092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 138726092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 138826092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 138926092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 139026092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 139126092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 139226092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 139326092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 139426092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 139526092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 139626092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1397df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 139826092bf5STheodore Ts'o {Opt_err, 0, 0} 139926092bf5STheodore Ts'o }; 140026092bf5STheodore Ts'o 140126092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 140226092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 140326092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 140426092bf5STheodore Ts'o { 140526092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 140626092bf5STheodore Ts'o const struct mount_opts *m; 140708cefc7aSEric W. Biederman kuid_t uid; 140808cefc7aSEric W. Biederman kgid_t gid; 140926092bf5STheodore Ts'o int arg = 0; 141026092bf5STheodore Ts'o 141157f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 141257f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 141357f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 141457f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 141557f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 141657f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 141757f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 141857f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 141957f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 142057f73c2cSTheodore Ts'o #endif 142126092bf5STheodore Ts'o switch (token) { 1422f7048605STheodore Ts'o case Opt_noacl: 1423f7048605STheodore Ts'o case Opt_nouser_xattr: 1424f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1425f7048605STheodore Ts'o break; 142626092bf5STheodore Ts'o case Opt_sb: 142726092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 142826092bf5STheodore Ts'o case Opt_removed: 14295f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 143026092bf5STheodore Ts'o return 1; 143126092bf5STheodore Ts'o case Opt_abort: 143226092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 143326092bf5STheodore Ts'o return 1; 143426092bf5STheodore Ts'o case Opt_i_version: 143526092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 143626092bf5STheodore Ts'o return 1; 143726092bf5STheodore Ts'o } 143826092bf5STheodore Ts'o 14395f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14405f3633e3SJan Kara if (token == m->token) 14415f3633e3SJan Kara break; 14425f3633e3SJan Kara 14435f3633e3SJan Kara if (m->token == Opt_err) { 14445f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 14455f3633e3SJan Kara "or missing value", opt); 14465f3633e3SJan Kara return -1; 14475f3633e3SJan Kara } 14485f3633e3SJan Kara 14498dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 14508dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14518dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 14528dc0aa8cSTheodore Ts'o return -1; 14538dc0aa8cSTheodore Ts'o } 14548dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 14558dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14568dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 14578dc0aa8cSTheodore Ts'o return -1; 14588dc0aa8cSTheodore Ts'o } 14598dc0aa8cSTheodore Ts'o 14600efb3b23SJan Kara if (args->from && match_int(args, &arg)) 14610efb3b23SJan Kara return -1; 146226092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 146326092bf5STheodore Ts'o return -1; 146426092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 146526092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 146626092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 146726092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 146826092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 146926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 147026092bf5STheodore Ts'o "options when quota turned on"); 147126092bf5STheodore Ts'o return -1; 147226092bf5STheodore Ts'o } 147326092bf5STheodore Ts'o 147426092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 147526092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 147626092bf5STheodore Ts'o } else if (token == Opt_commit) { 147726092bf5STheodore Ts'o if (arg == 0) 147826092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 147926092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 148026092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 148126092bf5STheodore Ts'o if (arg == 0) 148226092bf5STheodore Ts'o arg = EXT4_DEF_MAX_BATCH_TIME; 148326092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 148426092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 148526092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 148626092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1487e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1488e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1489e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1490e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 149126092bf5STheodore Ts'o return -1; 149226092bf5STheodore Ts'o } 149326092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 149426092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 149526092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 149626092bf5STheodore Ts'o if (!args->from) 149726092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 149826092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1499df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1500df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 150126092bf5STheodore Ts'o } else if (token == Opt_stripe) { 150226092bf5STheodore Ts'o sbi->s_stripe = arg; 15030efb3b23SJan Kara } else if (token == Opt_resuid) { 15040efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15050efb3b23SJan Kara if (!uid_valid(uid)) { 15065f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15070efb3b23SJan Kara return -1; 15080efb3b23SJan Kara } 15090efb3b23SJan Kara sbi->s_resuid = uid; 15100efb3b23SJan Kara } else if (token == Opt_resgid) { 15110efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15120efb3b23SJan Kara if (!gid_valid(gid)) { 15135f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15140efb3b23SJan Kara return -1; 15150efb3b23SJan Kara } 15160efb3b23SJan Kara sbi->s_resgid = gid; 15170efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15180efb3b23SJan Kara if (is_remount) { 15190efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15200efb3b23SJan Kara "Cannot specify journal on remount"); 15210efb3b23SJan Kara return -1; 15220efb3b23SJan Kara } 15230efb3b23SJan Kara *journal_devnum = arg; 15240efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 15250efb3b23SJan Kara if (arg > 7) { 15265f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 15270efb3b23SJan Kara " (must be 0-7)"); 15280efb3b23SJan Kara return -1; 15290efb3b23SJan Kara } 15300efb3b23SJan Kara *journal_ioprio = 15310efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 153226092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 153326092bf5STheodore Ts'o if (is_remount) { 153426092bf5STheodore Ts'o if (!sbi->s_journal) 153526092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 15365f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 153726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 153826092bf5STheodore Ts'o "Cannot change data mode on remount"); 153926092bf5STheodore Ts'o return -1; 154026092bf5STheodore Ts'o } 154126092bf5STheodore Ts'o } else { 154226092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 154326092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 154426092bf5STheodore Ts'o } 154526092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 154626092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 154726092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 154826092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 15495f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 15505f3633e3SJan Kara "quota options when quota turned on"); 155126092bf5STheodore Ts'o return -1; 155226092bf5STheodore Ts'o } 1553*262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1554*262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1555*262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1556*262b4662SJan Kara "Cannot set journaled quota options " 1557*262b4662SJan Kara "when QUOTA feature is enabled"); 1558*262b4662SJan Kara return -1; 1559*262b4662SJan Kara } 156026092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 156126092bf5STheodore Ts'o #endif 156226092bf5STheodore Ts'o } else { 156326092bf5STheodore Ts'o if (!args->from) 156426092bf5STheodore Ts'o arg = 1; 156526092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 156626092bf5STheodore Ts'o arg = !arg; 156726092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 156826092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 156926092bf5STheodore Ts'o "buggy handling of option %s", opt); 157026092bf5STheodore Ts'o WARN_ON(1); 157126092bf5STheodore Ts'o return -1; 157226092bf5STheodore Ts'o } 157326092bf5STheodore Ts'o if (arg != 0) 157426092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 157526092bf5STheodore Ts'o else 157626092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 157726092bf5STheodore Ts'o } 157826092bf5STheodore Ts'o return 1; 157926092bf5STheodore Ts'o } 158026092bf5STheodore Ts'o 1581ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1582c3191067STheodore Ts'o unsigned long *journal_devnum, 1583b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1584661aa520SEric Sandeen int is_remount) 1585ac27a0ecSDave Kleikamp { 1586617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1587ac27a0ecSDave Kleikamp char *p; 1588ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 158926092bf5STheodore Ts'o int token; 1590ac27a0ecSDave Kleikamp 1591ac27a0ecSDave Kleikamp if (!options) 1592ac27a0ecSDave Kleikamp return 1; 1593ac27a0ecSDave Kleikamp 1594ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1595ac27a0ecSDave Kleikamp if (!*p) 1596ac27a0ecSDave Kleikamp continue; 159715121c18SEric Sandeen /* 159815121c18SEric Sandeen * Initialize args struct so we know whether arg was 159915121c18SEric Sandeen * found; some options take optional arguments. 160015121c18SEric Sandeen */ 1601caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1602ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 160326092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 160426092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1605ac27a0ecSDave Kleikamp return 0; 1606ac27a0ecSDave Kleikamp } 1607ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1608*262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1609*262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1610*262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1611*262b4662SJan Kara "feature is enabled"); 1612*262b4662SJan Kara return 0; 1613*262b4662SJan Kara } 1614ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1615482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1616fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1617ac27a0ecSDave Kleikamp 1618482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1619fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1620ac27a0ecSDave Kleikamp 162156c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1622b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1623b31e1552SEric Sandeen "format mixing"); 1624ac27a0ecSDave Kleikamp return 0; 1625ac27a0ecSDave Kleikamp } 1626ac27a0ecSDave Kleikamp 1627ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1628b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1629b31e1552SEric Sandeen "not specified"); 1630ac27a0ecSDave Kleikamp return 0; 1631ac27a0ecSDave Kleikamp } 1632ac27a0ecSDave Kleikamp } else { 1633ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1634b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 16352c8be6b2SJan Kara "specified with no journaling " 1636b31e1552SEric Sandeen "enabled"); 1637ac27a0ecSDave Kleikamp return 0; 1638ac27a0ecSDave Kleikamp } 1639ac27a0ecSDave Kleikamp } 1640ac27a0ecSDave Kleikamp #endif 1641261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1642261cb20cSJan Kara int blocksize = 1643261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1644261cb20cSJan Kara 1645261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1646261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1647261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1648261cb20cSJan Kara return 0; 1649261cb20cSJan Kara } 1650261cb20cSJan Kara } 1651ac27a0ecSDave Kleikamp return 1; 1652ac27a0ecSDave Kleikamp } 1653ac27a0ecSDave Kleikamp 16542adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 16552adf6da8STheodore Ts'o struct super_block *sb) 16562adf6da8STheodore Ts'o { 16572adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 16582adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 16592adf6da8STheodore Ts'o 16602adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 16612adf6da8STheodore Ts'o char *fmtname = ""; 16622adf6da8STheodore Ts'o 16632adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 16642adf6da8STheodore Ts'o case QFMT_VFS_OLD: 16652adf6da8STheodore Ts'o fmtname = "vfsold"; 16662adf6da8STheodore Ts'o break; 16672adf6da8STheodore Ts'o case QFMT_VFS_V0: 16682adf6da8STheodore Ts'o fmtname = "vfsv0"; 16692adf6da8STheodore Ts'o break; 16702adf6da8STheodore Ts'o case QFMT_VFS_V1: 16712adf6da8STheodore Ts'o fmtname = "vfsv1"; 16722adf6da8STheodore Ts'o break; 16732adf6da8STheodore Ts'o } 16742adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 16752adf6da8STheodore Ts'o } 16762adf6da8STheodore Ts'o 16772adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 16782adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 16792adf6da8STheodore Ts'o 16802adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 16812adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 16822adf6da8STheodore Ts'o 16832adf6da8STheodore Ts'o if (test_opt(sb, USRQUOTA)) 16842adf6da8STheodore Ts'o seq_puts(seq, ",usrquota"); 16852adf6da8STheodore Ts'o 16862adf6da8STheodore Ts'o if (test_opt(sb, GRPQUOTA)) 16872adf6da8STheodore Ts'o seq_puts(seq, ",grpquota"); 16882adf6da8STheodore Ts'o #endif 16892adf6da8STheodore Ts'o } 16902adf6da8STheodore Ts'o 16915a916be1STheodore Ts'o static const char *token2str(int token) 16925a916be1STheodore Ts'o { 169350df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 16945a916be1STheodore Ts'o 16955a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 16965a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 16975a916be1STheodore Ts'o break; 16985a916be1STheodore Ts'o return t->pattern; 16995a916be1STheodore Ts'o } 17005a916be1STheodore Ts'o 17012adf6da8STheodore Ts'o /* 17022adf6da8STheodore Ts'o * Show an option if 17032adf6da8STheodore Ts'o * - it's set to a non-default value OR 17042adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17052adf6da8STheodore Ts'o */ 170666acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 170766acdcf4STheodore Ts'o int nodefs) 17082adf6da8STheodore Ts'o { 17092adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17102adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 171166acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17125a916be1STheodore Ts'o const struct mount_opts *m; 171366acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17142adf6da8STheodore Ts'o 171566acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 171666acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17172adf6da8STheodore Ts'o 17182adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17195a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17205a916be1STheodore Ts'o 17215a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17225a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17235a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17245a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17255a916be1STheodore Ts'o continue; 172666acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17275a916be1STheodore Ts'o continue; /* skip if same as the default */ 17285a916be1STheodore Ts'o if ((want_set && 17295a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17305a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17315a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17325a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17335a916be1STheodore Ts'o } 17345a916be1STheodore Ts'o 173508cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17365a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 173708cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 173808cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 173908cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 17405a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 174108cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 174208cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 174366acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 17445a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 17455a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 17462adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 17475a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 17482adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 17495a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 175066acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 17515a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 175266acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 17535a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 175466acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 17555a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 17562adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 17575a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 175866acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 17595a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 176066acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 17612adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 17625a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 17632adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 17645a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 17652adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 17665a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 17675a916be1STheodore Ts'o } 176866acdcf4STheodore Ts'o if (nodefs || 176966acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 17705a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 17712adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 17722adf6da8STheodore Ts'o 177366acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 177466acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 17755a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1776df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1777df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 17782adf6da8STheodore Ts'o 17792adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 17802adf6da8STheodore Ts'o return 0; 17812adf6da8STheodore Ts'o } 17822adf6da8STheodore Ts'o 178366acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 178466acdcf4STheodore Ts'o { 178566acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 178666acdcf4STheodore Ts'o } 178766acdcf4STheodore Ts'o 178866acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 178966acdcf4STheodore Ts'o { 179066acdcf4STheodore Ts'o struct super_block *sb = seq->private; 179166acdcf4STheodore Ts'o int rc; 179266acdcf4STheodore Ts'o 179366acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 179466acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 179566acdcf4STheodore Ts'o seq_puts(seq, "\n"); 179666acdcf4STheodore Ts'o return rc; 179766acdcf4STheodore Ts'o } 179866acdcf4STheodore Ts'o 179966acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 180066acdcf4STheodore Ts'o { 180166acdcf4STheodore Ts'o return single_open(file, options_seq_show, PDE(inode)->data); 180266acdcf4STheodore Ts'o } 180366acdcf4STheodore Ts'o 180466acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 180566acdcf4STheodore Ts'o .owner = THIS_MODULE, 180666acdcf4STheodore Ts'o .open = options_open_fs, 180766acdcf4STheodore Ts'o .read = seq_read, 180866acdcf4STheodore Ts'o .llseek = seq_lseek, 180966acdcf4STheodore Ts'o .release = single_release, 181066acdcf4STheodore Ts'o }; 181166acdcf4STheodore Ts'o 1812617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1813ac27a0ecSDave Kleikamp int read_only) 1814ac27a0ecSDave Kleikamp { 1815617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1816ac27a0ecSDave Kleikamp int res = 0; 1817ac27a0ecSDave Kleikamp 1818617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1819b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1820b31e1552SEric Sandeen "forcing read-only mode"); 1821ac27a0ecSDave Kleikamp res = MS_RDONLY; 1822ac27a0ecSDave Kleikamp } 1823ac27a0ecSDave Kleikamp if (read_only) 1824281b5995STheodore Ts'o goto done; 1825617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1826b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1827b31e1552SEric Sandeen "running e2fsck is recommended"); 1828617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1829b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1830b31e1552SEric Sandeen "warning: mounting fs with errors, " 1831b31e1552SEric Sandeen "running e2fsck is recommended"); 1832ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1833ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1834ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1835b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1836b31e1552SEric Sandeen "warning: maximal mount count reached, " 1837b31e1552SEric Sandeen "running e2fsck is recommended"); 1838ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1839ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1840ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1841b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1842b31e1552SEric Sandeen "warning: checktime reached, " 1843b31e1552SEric Sandeen "running e2fsck is recommended"); 18440390131bSFrank Mayhar if (!sbi->s_journal) 1845216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1846ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1847617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1848e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1849ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1850617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 18510390131bSFrank Mayhar if (sbi->s_journal) 1852617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1853ac27a0ecSDave Kleikamp 1854e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1855281b5995STheodore Ts'o done: 1856ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1857a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1858a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1859ac27a0ecSDave Kleikamp sb->s_blocksize, 1860ac27a0ecSDave Kleikamp sbi->s_groups_count, 1861617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1862617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1863a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1864ac27a0ecSDave Kleikamp 18657abc52c2SDan Magenheimer cleancache_init_fs(sb); 1866ac27a0ecSDave Kleikamp return res; 1867ac27a0ecSDave Kleikamp } 1868ac27a0ecSDave Kleikamp 1869117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1870117fff10STheodore Ts'o { 1871117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1872117fff10STheodore Ts'o struct flex_groups *new_groups; 1873117fff10STheodore Ts'o int size; 1874117fff10STheodore Ts'o 1875117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1876117fff10STheodore Ts'o return 0; 1877117fff10STheodore Ts'o 1878117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1879117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1880117fff10STheodore Ts'o return 0; 1881117fff10STheodore Ts'o 1882117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1883117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1884117fff10STheodore Ts'o if (!new_groups) { 1885117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1886117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1887117fff10STheodore Ts'o return -ENOMEM; 1888117fff10STheodore Ts'o } 1889117fff10STheodore Ts'o 1890117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1891117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1892117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1893117fff10STheodore Ts'o sizeof(struct flex_groups))); 1894117fff10STheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 1895117fff10STheodore Ts'o } 1896117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1897117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1898117fff10STheodore Ts'o return 0; 1899117fff10STheodore Ts'o } 1900117fff10STheodore Ts'o 1901772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1902772cb7c8SJose R. Santos { 1903772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1904772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1905772cb7c8SJose R. Santos ext4_group_t flex_group; 1906d50f2ab6SXi Wang unsigned int groups_per_flex = 0; 1907117fff10STheodore Ts'o int i, err; 1908772cb7c8SJose R. Santos 1909503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1910d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1911772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1912772cb7c8SJose R. Santos return 1; 1913772cb7c8SJose R. Santos } 191476495ec1SLukas Czerner groups_per_flex = 1U << sbi->s_log_groups_per_flex; 1915772cb7c8SJose R. Santos 1916117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1917117fff10STheodore Ts'o if (err) 1918772cb7c8SJose R. Santos goto failed; 1919772cb7c8SJose R. Santos 1920772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 192188b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1922772cb7c8SJose R. Santos 1923772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19247ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19257ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 1926021b65bbSTheodore Ts'o atomic_add(ext4_free_group_clusters(sb, gdp), 192724aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19287ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19297ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1930772cb7c8SJose R. Santos } 1931772cb7c8SJose R. Santos 1932772cb7c8SJose R. Santos return 1; 1933772cb7c8SJose R. Santos failed: 1934772cb7c8SJose R. Santos return 0; 1935772cb7c8SJose R. Santos } 1936772cb7c8SJose R. Santos 1937feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1938717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1939717d50e4SAndreas Dilger { 1940feb0ab32SDarrick J. Wong int offset; 1941717d50e4SAndreas Dilger __u16 crc = 0; 1942717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1943717d50e4SAndreas Dilger 1944feb0ab32SDarrick J. Wong if ((sbi->s_es->s_feature_ro_compat & 1945feb0ab32SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { 1946feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1947feb0ab32SDarrick J. Wong __u16 old_csum; 1948feb0ab32SDarrick J. Wong __u32 csum32; 1949feb0ab32SDarrick J. Wong 1950feb0ab32SDarrick J. Wong old_csum = gdp->bg_checksum; 1951feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 1952feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 1953feb0ab32SDarrick J. Wong sizeof(le_group)); 1954feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 1955feb0ab32SDarrick J. Wong sbi->s_desc_size); 1956feb0ab32SDarrick J. Wong gdp->bg_checksum = old_csum; 1957feb0ab32SDarrick J. Wong 1958feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 1959feb0ab32SDarrick J. Wong goto out; 1960feb0ab32SDarrick J. Wong } 1961feb0ab32SDarrick J. Wong 1962feb0ab32SDarrick J. Wong /* old crc16 code */ 1963feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 1964feb0ab32SDarrick J. Wong 1965717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1966717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1967717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1968717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1969717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1970717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1971717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1972717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1973717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1974717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1975717d50e4SAndreas Dilger offset); 1976717d50e4SAndreas Dilger 1977feb0ab32SDarrick J. Wong out: 1978717d50e4SAndreas Dilger return cpu_to_le16(crc); 1979717d50e4SAndreas Dilger } 1980717d50e4SAndreas Dilger 1981feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 1982717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1983717d50e4SAndreas Dilger { 1984feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 1985feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 1986feb0ab32SDarrick J. Wong block_group, gdp))) 1987717d50e4SAndreas Dilger return 0; 1988717d50e4SAndreas Dilger 1989717d50e4SAndreas Dilger return 1; 1990717d50e4SAndreas Dilger } 1991717d50e4SAndreas Dilger 1992feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 1993feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 1994feb0ab32SDarrick J. Wong { 1995feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 1996feb0ab32SDarrick J. Wong return; 1997feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 1998feb0ab32SDarrick J. Wong } 1999feb0ab32SDarrick J. Wong 2000ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2001bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2002bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2003ac27a0ecSDave Kleikamp { 2004617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2005617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2006617ba13bSMingming Cao ext4_fsblk_t last_block; 2007bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2008bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2009bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2010ce421581SJose R. Santos int flexbg_flag = 0; 2011bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2012ac27a0ecSDave Kleikamp 2013ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2014ce421581SJose R. Santos flexbg_flag = 1; 2015ce421581SJose R. Santos 2016617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2017ac27a0ecSDave Kleikamp 2018197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2019197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2020197cd65aSAkinobu Mita 2021ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2022bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2023ac27a0ecSDave Kleikamp else 2024ac27a0ecSDave Kleikamp last_block = first_block + 2025617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2026ac27a0ecSDave Kleikamp 2027bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2028bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2029bfff6873SLukas Czerner grp = i; 2030bfff6873SLukas Czerner 20318fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20322b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2033b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2034a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2035b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2036ac27a0ecSDave Kleikamp return 0; 2037ac27a0ecSDave Kleikamp } 20388fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20392b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2040b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2041a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2042b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2043ac27a0ecSDave Kleikamp return 0; 2044ac27a0ecSDave Kleikamp } 20458fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2046bd81d8eeSLaurent Vivier if (inode_table < first_block || 20472b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2048b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2049a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2050b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2051ac27a0ecSDave Kleikamp return 0; 2052ac27a0ecSDave Kleikamp } 2053955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2054feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2055b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2056b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2057fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2058fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20597ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2060955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2061717d50e4SAndreas Dilger return 0; 2062717d50e4SAndreas Dilger } 20637ee1ec4cSLi Zefan } 2064955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2065ce421581SJose R. Santos if (!flexbg_flag) 2066617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2067ac27a0ecSDave Kleikamp } 2068bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2069bfff6873SLukas Czerner *first_not_zeroed = grp; 2070ac27a0ecSDave Kleikamp 20715dee5437STheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 20725dee5437STheodore Ts'o EXT4_C2B(sbi, ext4_count_free_clusters(sb))); 2073617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2074ac27a0ecSDave Kleikamp return 1; 2075ac27a0ecSDave Kleikamp } 2076ac27a0ecSDave Kleikamp 2077617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2078ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2079ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2080ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2081ac27a0ecSDave Kleikamp * 2082ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2083ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2084ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2085ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2086ac27a0ecSDave Kleikamp * 2087ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2088ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2089ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2090617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2091ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2092ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2093ac27a0ecSDave Kleikamp */ 2094617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2095617ba13bSMingming Cao struct ext4_super_block *es) 2096ac27a0ecSDave Kleikamp { 2097ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2098ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2099ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2100ac27a0ecSDave Kleikamp int i; 2101ac27a0ecSDave Kleikamp #endif 2102ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2103ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2104ac27a0ecSDave Kleikamp return; 2105ac27a0ecSDave Kleikamp } 2106ac27a0ecSDave Kleikamp 2107a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2108b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2109b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2110a8f48a95SEric Sandeen return; 2111a8f48a95SEric Sandeen } 2112a8f48a95SEric Sandeen 2113d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2114d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2115d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2116d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2117d39195c3SAmir Goldstein return; 2118d39195c3SAmir Goldstein } 2119d39195c3SAmir Goldstein 2120617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2121c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2122c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 2123ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2124ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2125ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2126c25f9bc6SEric Sandeen } 2127ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2128ac27a0ecSDave Kleikamp return; 2129ac27a0ecSDave Kleikamp } 2130ac27a0ecSDave Kleikamp 2131ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2132b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2133ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2134ac27a0ecSDave Kleikamp } 2135ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2136ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2137ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2138ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2139ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2140617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2141617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2142ac27a0ecSDave Kleikamp if (ret < 0) 2143b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2144b31e1552SEric Sandeen "Cannot turn on journaled " 2145b31e1552SEric Sandeen "quota: error %d", ret); 2146ac27a0ecSDave Kleikamp } 2147ac27a0ecSDave Kleikamp } 2148ac27a0ecSDave Kleikamp #endif 2149ac27a0ecSDave Kleikamp 2150ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2151ac27a0ecSDave Kleikamp struct inode *inode; 2152ac27a0ecSDave Kleikamp 215397bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 215497bd42b9SJosef Bacik if (IS_ERR(inode)) { 2155ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2156ac27a0ecSDave Kleikamp break; 2157ac27a0ecSDave Kleikamp } 2158ac27a0ecSDave Kleikamp 2159617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2160871a2931SChristoph Hellwig dquot_initialize(inode); 2161ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2162b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2163b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 216446e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2165e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2166ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2167721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 2168617ba13bSMingming Cao ext4_truncate(inode); 2169721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2170ac27a0ecSDave Kleikamp nr_truncates++; 2171ac27a0ecSDave Kleikamp } else { 2172b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2173b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 217446e665e9SHarvey Harrison __func__, inode->i_ino); 2175ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2176ac27a0ecSDave Kleikamp inode->i_ino); 2177ac27a0ecSDave Kleikamp nr_orphans++; 2178ac27a0ecSDave Kleikamp } 2179ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2180ac27a0ecSDave Kleikamp } 2181ac27a0ecSDave Kleikamp 2182ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2183ac27a0ecSDave Kleikamp 2184ac27a0ecSDave Kleikamp if (nr_orphans) 2185b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2186b31e1552SEric Sandeen PLURAL(nr_orphans)); 2187ac27a0ecSDave Kleikamp if (nr_truncates) 2188b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2189b31e1552SEric Sandeen PLURAL(nr_truncates)); 2190ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2191ac27a0ecSDave Kleikamp /* Turn quotas off */ 2192ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2193ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2194287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2195ac27a0ecSDave Kleikamp } 2196ac27a0ecSDave Kleikamp #endif 2197ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2198ac27a0ecSDave Kleikamp } 21990b8e58a1SAndreas Dilger 2200cd2291a4SEric Sandeen /* 2201cd2291a4SEric Sandeen * Maximal extent format file size. 2202cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2203cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2204cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2205cd2291a4SEric Sandeen * so that won't be a limiting factor. 2206cd2291a4SEric Sandeen * 2207f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2208f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2209f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2210f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2211f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2212f17722f9SLukas Czerner * 2213cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2214cd2291a4SEric Sandeen */ 2215f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2216cd2291a4SEric Sandeen { 2217cd2291a4SEric Sandeen loff_t res; 2218cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2219cd2291a4SEric Sandeen 2220cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2221f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2222cd2291a4SEric Sandeen /* 222390c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2224cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2225cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2226cd2291a4SEric Sandeen */ 2227cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2228cd2291a4SEric Sandeen 2229cd2291a4SEric Sandeen /* total blocks in file system block size */ 2230cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2231cd2291a4SEric Sandeen upper_limit <<= blkbits; 2232cd2291a4SEric Sandeen } 2233cd2291a4SEric Sandeen 2234f17722f9SLukas Czerner /* 2235f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2236f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2237f17722f9SLukas Czerner * size 2238f17722f9SLukas Czerner */ 2239f17722f9SLukas Czerner res = (1LL << 32) - 1; 2240cd2291a4SEric Sandeen res <<= blkbits; 2241cd2291a4SEric Sandeen 2242cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2243cd2291a4SEric Sandeen if (res > upper_limit) 2244cd2291a4SEric Sandeen res = upper_limit; 2245cd2291a4SEric Sandeen 2246cd2291a4SEric Sandeen return res; 2247cd2291a4SEric Sandeen } 2248ac27a0ecSDave Kleikamp 2249ac27a0ecSDave Kleikamp /* 2250cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22510fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22520fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2253ac27a0ecSDave Kleikamp */ 2254f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2255ac27a0ecSDave Kleikamp { 2256617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22570fc1b451SAneesh Kumar K.V int meta_blocks; 22580fc1b451SAneesh Kumar K.V loff_t upper_limit; 22590b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22600b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22610b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22620b8e58a1SAndreas Dilger * 22630b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22640b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 22650fc1b451SAneesh Kumar K.V */ 22660fc1b451SAneesh Kumar K.V 2267f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 22680fc1b451SAneesh Kumar K.V /* 226990c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 22700b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 22710b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 22720fc1b451SAneesh Kumar K.V */ 22730fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 22740fc1b451SAneesh Kumar K.V 22750fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 22760fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 22770fc1b451SAneesh Kumar K.V 22780fc1b451SAneesh Kumar K.V } else { 22798180a562SAneesh Kumar K.V /* 22808180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 22818180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 22828180a562SAneesh Kumar K.V * represent total number of blocks in 22838180a562SAneesh Kumar K.V * file system block size 22848180a562SAneesh Kumar K.V */ 22850fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 22860fc1b451SAneesh Kumar K.V 22870fc1b451SAneesh Kumar K.V } 22880fc1b451SAneesh Kumar K.V 22890fc1b451SAneesh Kumar K.V /* indirect blocks */ 22900fc1b451SAneesh Kumar K.V meta_blocks = 1; 22910fc1b451SAneesh Kumar K.V /* double indirect blocks */ 22920fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 22930fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 22940fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 22950fc1b451SAneesh Kumar K.V 22960fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 22970fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2298ac27a0ecSDave Kleikamp 2299ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2300ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2301ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2302ac27a0ecSDave Kleikamp res <<= bits; 2303ac27a0ecSDave Kleikamp if (res > upper_limit) 2304ac27a0ecSDave Kleikamp res = upper_limit; 23050fc1b451SAneesh Kumar K.V 23060fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23070fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23080fc1b451SAneesh Kumar K.V 2309ac27a0ecSDave Kleikamp return res; 2310ac27a0ecSDave Kleikamp } 2311ac27a0ecSDave Kleikamp 2312617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 231370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2314ac27a0ecSDave Kleikamp { 2315617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2316fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2317ac27a0ecSDave Kleikamp int has_super = 0; 2318ac27a0ecSDave Kleikamp 2319ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2320ac27a0ecSDave Kleikamp 2321617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2322ac27a0ecSDave Kleikamp nr < first_meta_bg) 232370bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2324ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2325617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2326ac27a0ecSDave Kleikamp has_super = 1; 23270b8e58a1SAndreas Dilger 2328617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2329ac27a0ecSDave Kleikamp } 2330ac27a0ecSDave Kleikamp 2331c9de560dSAlex Tomas /** 2332c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2333c9de560dSAlex Tomas * @sbi: In memory super block info 2334c9de560dSAlex Tomas * 2335c9de560dSAlex Tomas * If we have specified it via mount option, then 2336c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2337c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2338c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2339c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2340c9de560dSAlex Tomas * 2341c9de560dSAlex Tomas */ 2342c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2343c9de560dSAlex Tomas { 2344c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2345c9de560dSAlex Tomas unsigned long stripe_width = 2346c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 23473eb08658SDan Ehrenberg int ret; 2348c9de560dSAlex Tomas 2349c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 23503eb08658SDan Ehrenberg ret = sbi->s_stripe; 23513eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 23523eb08658SDan Ehrenberg ret = stripe_width; 23533eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 23543eb08658SDan Ehrenberg ret = stride; 23553eb08658SDan Ehrenberg else 23563eb08658SDan Ehrenberg ret = 0; 2357c9de560dSAlex Tomas 23583eb08658SDan Ehrenberg /* 23593eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 23603eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 23613eb08658SDan Ehrenberg */ 23623eb08658SDan Ehrenberg if (ret <= 1) 23633eb08658SDan Ehrenberg ret = 0; 2364c9de560dSAlex Tomas 23653eb08658SDan Ehrenberg return ret; 2366c9de560dSAlex Tomas } 2367ac27a0ecSDave Kleikamp 23683197ebdbSTheodore Ts'o /* sysfs supprt */ 23693197ebdbSTheodore Ts'o 23703197ebdbSTheodore Ts'o struct ext4_attr { 23713197ebdbSTheodore Ts'o struct attribute attr; 23723197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 23733197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 23743197ebdbSTheodore Ts'o const char *, size_t); 23753197ebdbSTheodore Ts'o int offset; 23763197ebdbSTheodore Ts'o }; 23773197ebdbSTheodore Ts'o 23783197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 23793197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 23803197ebdbSTheodore Ts'o { 23813197ebdbSTheodore Ts'o char *endp; 23823197ebdbSTheodore Ts'o 2383e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2384e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 23853197ebdbSTheodore Ts'o if (*endp || *value > max) 23863197ebdbSTheodore Ts'o return -EINVAL; 23873197ebdbSTheodore Ts'o 23883197ebdbSTheodore Ts'o return 0; 23893197ebdbSTheodore Ts'o } 23903197ebdbSTheodore Ts'o 23913197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 23923197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 23933197ebdbSTheodore Ts'o char *buf) 23943197ebdbSTheodore Ts'o { 23953197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 23967b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 23977b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 23983197ebdbSTheodore Ts'o } 23993197ebdbSTheodore Ts'o 24003197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24013197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24023197ebdbSTheodore Ts'o { 24033197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24043197ebdbSTheodore Ts'o 2405f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2406f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24073197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24083197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24093197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24103197ebdbSTheodore Ts'o } 24113197ebdbSTheodore Ts'o 24123197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24133197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24143197ebdbSTheodore Ts'o { 24153197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24163197ebdbSTheodore Ts'o 2417f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2418f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24193197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2420a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24213197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2422a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24233197ebdbSTheodore Ts'o } 24243197ebdbSTheodore Ts'o 24253197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24263197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24273197ebdbSTheodore Ts'o const char *buf, size_t count) 24283197ebdbSTheodore Ts'o { 24293197ebdbSTheodore Ts'o unsigned long t; 24303197ebdbSTheodore Ts'o 24313197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 24323197ebdbSTheodore Ts'o return -EINVAL; 24333197ebdbSTheodore Ts'o 24345dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 24353197ebdbSTheodore Ts'o return -EINVAL; 24363197ebdbSTheodore Ts'o 24373197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24383197ebdbSTheodore Ts'o return count; 24393197ebdbSTheodore Ts'o } 24403197ebdbSTheodore Ts'o 24413197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24423197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24433197ebdbSTheodore Ts'o { 24443197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24453197ebdbSTheodore Ts'o 24463197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24473197ebdbSTheodore Ts'o } 24483197ebdbSTheodore Ts'o 24493197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 24503197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24513197ebdbSTheodore Ts'o const char *buf, size_t count) 24523197ebdbSTheodore Ts'o { 24533197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24543197ebdbSTheodore Ts'o unsigned long t; 24553197ebdbSTheodore Ts'o 24563197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24573197ebdbSTheodore Ts'o return -EINVAL; 24583197ebdbSTheodore Ts'o *ui = t; 24593197ebdbSTheodore Ts'o return count; 24603197ebdbSTheodore Ts'o } 24613197ebdbSTheodore Ts'o 24622c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 24632c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 24642c0544b2STheodore Ts'o const char *buf, size_t count) 24652c0544b2STheodore Ts'o { 24662c0544b2STheodore Ts'o int len = count; 24672c0544b2STheodore Ts'o 24682c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 24692c0544b2STheodore Ts'o return -EPERM; 24702c0544b2STheodore Ts'o 24712c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 24722c0544b2STheodore Ts'o len--; 24732c0544b2STheodore Ts'o 24742c0544b2STheodore Ts'o if (len) 24752c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 24762c0544b2STheodore Ts'o return count; 24772c0544b2STheodore Ts'o } 24782c0544b2STheodore Ts'o 24793197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 24803197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 24813197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 24823197ebdbSTheodore Ts'o .show = _show, \ 24833197ebdbSTheodore Ts'o .store = _store, \ 24843197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 24853197ebdbSTheodore Ts'o } 24863197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 24873197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 24883197ebdbSTheodore Ts'o 2489857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 24903197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 24913197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 24923197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 24933197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 24943197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 24953197ebdbSTheodore Ts'o 24963197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 24973197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 24983197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 24993197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 25003197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 250111013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 25023197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 25033197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 25043197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 25053197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 25063197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 25073197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 250855138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 250967a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 25102c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 25113197ebdbSTheodore Ts'o 25123197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 25133197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 25143197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 25153197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 25163197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 251711013911SAndreas Dilger ATTR_LIST(inode_goal), 25183197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 25193197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 25203197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 25213197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 25223197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 25233197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 252455138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 252567a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 25262c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 25273197ebdbSTheodore Ts'o NULL, 25283197ebdbSTheodore Ts'o }; 25293197ebdbSTheodore Ts'o 2530857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2531857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 253227ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 25335e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2534857ac889SLukas Czerner 2535857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2536857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 253727ee40dfSLukas Czerner ATTR_LIST(batched_discard), 25385e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2539857ac889SLukas Czerner NULL, 2540857ac889SLukas Czerner }; 2541857ac889SLukas Czerner 25423197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 25433197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 25443197ebdbSTheodore Ts'o { 25453197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25463197ebdbSTheodore Ts'o s_kobj); 25473197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25483197ebdbSTheodore Ts'o 25493197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 25503197ebdbSTheodore Ts'o } 25513197ebdbSTheodore Ts'o 25523197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 25533197ebdbSTheodore Ts'o struct attribute *attr, 25543197ebdbSTheodore Ts'o const char *buf, size_t len) 25553197ebdbSTheodore Ts'o { 25563197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25573197ebdbSTheodore Ts'o s_kobj); 25583197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25593197ebdbSTheodore Ts'o 25603197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 25613197ebdbSTheodore Ts'o } 25623197ebdbSTheodore Ts'o 25633197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 25643197ebdbSTheodore Ts'o { 25653197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25663197ebdbSTheodore Ts'o s_kobj); 25673197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 25683197ebdbSTheodore Ts'o } 25693197ebdbSTheodore Ts'o 257052cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 25713197ebdbSTheodore Ts'o .show = ext4_attr_show, 25723197ebdbSTheodore Ts'o .store = ext4_attr_store, 25733197ebdbSTheodore Ts'o }; 25743197ebdbSTheodore Ts'o 25753197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 25763197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 25773197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 25783197ebdbSTheodore Ts'o .release = ext4_sb_release, 25793197ebdbSTheodore Ts'o }; 25803197ebdbSTheodore Ts'o 2581857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2582857ac889SLukas Czerner { 2583857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2584857ac889SLukas Czerner } 2585857ac889SLukas Czerner 2586857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2587857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2588857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2589857ac889SLukas Czerner .release = ext4_feat_release, 2590857ac889SLukas Czerner }; 2591857ac889SLukas Czerner 2592a13fb1a4SEric Sandeen /* 2593a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2594a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2595a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2596a13fb1a4SEric Sandeen * 0 if it cannot be. 2597a13fb1a4SEric Sandeen */ 2598a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2599a13fb1a4SEric Sandeen { 2600a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2601a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2602a13fb1a4SEric Sandeen "Couldn't mount because of " 2603a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2604a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2605a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2606a13fb1a4SEric Sandeen return 0; 2607a13fb1a4SEric Sandeen } 2608a13fb1a4SEric Sandeen 2609a13fb1a4SEric Sandeen if (readonly) 2610a13fb1a4SEric Sandeen return 1; 2611a13fb1a4SEric Sandeen 2612a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2613a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2614a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2615a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2616a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2617a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2618a13fb1a4SEric Sandeen return 0; 2619a13fb1a4SEric Sandeen } 2620a13fb1a4SEric Sandeen /* 2621a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2622a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2623a13fb1a4SEric Sandeen */ 2624a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2625a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2626a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2627a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2628a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2629a13fb1a4SEric Sandeen return 0; 2630a13fb1a4SEric Sandeen } 2631a13fb1a4SEric Sandeen } 2632bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2633bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2634bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2635bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2636bab08ab9STheodore Ts'o "extents feature\n"); 2637bab08ab9STheodore Ts'o return 0; 2638bab08ab9STheodore Ts'o } 26397c319d32SAditya Kali 26407c319d32SAditya Kali #ifndef CONFIG_QUOTA 26417c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 26427c319d32SAditya Kali !readonly) { 26437c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 26447c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 26457c319d32SAditya Kali "without CONFIG_QUOTA"); 26467c319d32SAditya Kali return 0; 26477c319d32SAditya Kali } 26487c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2649a13fb1a4SEric Sandeen return 1; 2650a13fb1a4SEric Sandeen } 2651a13fb1a4SEric Sandeen 265266e61a9eSTheodore Ts'o /* 265366e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 265466e61a9eSTheodore Ts'o * on the file system 265566e61a9eSTheodore Ts'o */ 265666e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 265766e61a9eSTheodore Ts'o { 265866e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 265966e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 266066e61a9eSTheodore Ts'o struct ext4_super_block *es; 266166e61a9eSTheodore Ts'o 266266e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 266366e61a9eSTheodore Ts'o es = sbi->s_es; 266466e61a9eSTheodore Ts'o 266566e61a9eSTheodore Ts'o if (es->s_error_count) 266666e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 266766e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 266866e61a9eSTheodore Ts'o if (es->s_first_error_time) { 266966e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 267066e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 267166e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 267266e61a9eSTheodore Ts'o es->s_first_error_func, 267366e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 267466e61a9eSTheodore Ts'o if (es->s_first_error_ino) 267566e61a9eSTheodore Ts'o printk(": inode %u", 267666e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 267766e61a9eSTheodore Ts'o if (es->s_first_error_block) 267866e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 267966e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 268066e61a9eSTheodore Ts'o printk("\n"); 268166e61a9eSTheodore Ts'o } 268266e61a9eSTheodore Ts'o if (es->s_last_error_time) { 268366e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 268466e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 268566e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 268666e61a9eSTheodore Ts'o es->s_last_error_func, 268766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 268866e61a9eSTheodore Ts'o if (es->s_last_error_ino) 268966e61a9eSTheodore Ts'o printk(": inode %u", 269066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 269166e61a9eSTheodore Ts'o if (es->s_last_error_block) 269266e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 269366e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 269466e61a9eSTheodore Ts'o printk("\n"); 269566e61a9eSTheodore Ts'o } 269666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 269766e61a9eSTheodore Ts'o } 269866e61a9eSTheodore Ts'o 2699bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2700bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2701bfff6873SLukas Czerner { 2702bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2703bfff6873SLukas Czerner ext4_group_t group, ngroups; 2704bfff6873SLukas Czerner struct super_block *sb; 2705bfff6873SLukas Czerner unsigned long timeout = 0; 2706bfff6873SLukas Czerner int ret = 0; 2707bfff6873SLukas Czerner 2708bfff6873SLukas Czerner sb = elr->lr_super; 2709bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2710bfff6873SLukas Czerner 27118e8ad8a5SJan Kara sb_start_write(sb); 2712bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2713bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2714bfff6873SLukas Czerner if (!gdp) { 2715bfff6873SLukas Czerner ret = 1; 2716bfff6873SLukas Czerner break; 2717bfff6873SLukas Czerner } 2718bfff6873SLukas Czerner 2719bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2720bfff6873SLukas Czerner break; 2721bfff6873SLukas Czerner } 2722bfff6873SLukas Czerner 27237f511862STheodore Ts'o if (group >= ngroups) 2724bfff6873SLukas Czerner ret = 1; 2725bfff6873SLukas Czerner 2726bfff6873SLukas Czerner if (!ret) { 2727bfff6873SLukas Czerner timeout = jiffies; 2728bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2729bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2730bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 273151ce6511SLukas Czerner timeout = (jiffies - timeout) * 273251ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2733bfff6873SLukas Czerner elr->lr_timeout = timeout; 2734bfff6873SLukas Czerner } 2735bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2736bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2737bfff6873SLukas Czerner } 27388e8ad8a5SJan Kara sb_end_write(sb); 2739bfff6873SLukas Czerner 2740bfff6873SLukas Czerner return ret; 2741bfff6873SLukas Czerner } 2742bfff6873SLukas Czerner 2743bfff6873SLukas Czerner /* 2744bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 27454ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2746bfff6873SLukas Czerner */ 2747bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2748bfff6873SLukas Czerner { 2749bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2750bfff6873SLukas Czerner 2751bfff6873SLukas Czerner if (!elr) 2752bfff6873SLukas Czerner return; 2753bfff6873SLukas Czerner 2754bfff6873SLukas Czerner sbi = elr->lr_sbi; 2755bfff6873SLukas Czerner 2756bfff6873SLukas Czerner list_del(&elr->lr_request); 2757bfff6873SLukas Czerner sbi->s_li_request = NULL; 2758bfff6873SLukas Czerner kfree(elr); 2759bfff6873SLukas Czerner } 2760bfff6873SLukas Czerner 2761bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2762bfff6873SLukas Czerner { 27631bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 27641bb933fbSLukas Czerner if (!ext4_li_info) { 27651bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2766bfff6873SLukas Czerner return; 27671bb933fbSLukas Czerner } 2768bfff6873SLukas Czerner 2769bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 27701bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2771bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 27721bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2773bfff6873SLukas Czerner } 2774bfff6873SLukas Czerner 27758f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 27768f1f7453SEric Sandeen 2777bfff6873SLukas Czerner /* 2778bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2779bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2780bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2781bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2782bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2783bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2784bfff6873SLukas Czerner * next waking time and put itself into sleep. 2785bfff6873SLukas Czerner */ 2786bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2787bfff6873SLukas Czerner { 2788bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2789bfff6873SLukas Czerner struct list_head *pos, *n; 2790bfff6873SLukas Czerner struct ext4_li_request *elr; 27914ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2792bfff6873SLukas Czerner 2793bfff6873SLukas Czerner BUG_ON(NULL == eli); 2794bfff6873SLukas Czerner 2795bfff6873SLukas Czerner cont_thread: 2796bfff6873SLukas Czerner while (true) { 2797bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2798bfff6873SLukas Czerner 2799bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2800bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2801bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2802bfff6873SLukas Czerner goto exit_thread; 2803bfff6873SLukas Czerner } 2804bfff6873SLukas Czerner 2805bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2806bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2807bfff6873SLukas Czerner lr_request); 2808bfff6873SLukas Czerner 2809b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2810b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2811b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2812bfff6873SLukas Czerner ext4_remove_li_request(elr); 2813bfff6873SLukas Czerner continue; 2814bfff6873SLukas Czerner } 2815b2c78cd0STheodore Ts'o } 2816bfff6873SLukas Czerner 2817bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2818bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2819bfff6873SLukas Czerner } 2820bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2821bfff6873SLukas Czerner 2822a0acae0eSTejun Heo try_to_freeze(); 2823bfff6873SLukas Czerner 28244ed5c033SLukas Czerner cur = jiffies; 28254ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2826f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2827bfff6873SLukas Czerner cond_resched(); 2828bfff6873SLukas Czerner continue; 2829bfff6873SLukas Czerner } 2830bfff6873SLukas Czerner 28314ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 28324ed5c033SLukas Czerner 28338f1f7453SEric Sandeen if (kthread_should_stop()) { 28348f1f7453SEric Sandeen ext4_clear_request_list(); 28358f1f7453SEric Sandeen goto exit_thread; 28368f1f7453SEric Sandeen } 2837bfff6873SLukas Czerner } 2838bfff6873SLukas Czerner 2839bfff6873SLukas Czerner exit_thread: 2840bfff6873SLukas Czerner /* 2841bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2842bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2843bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2844bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2845bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2846bfff6873SLukas Czerner * new one. 2847bfff6873SLukas Czerner */ 2848bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2849bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2850bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2851bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2852bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2853bfff6873SLukas Czerner goto cont_thread; 2854bfff6873SLukas Czerner } 2855bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2856bfff6873SLukas Czerner kfree(ext4_li_info); 2857bfff6873SLukas Czerner ext4_li_info = NULL; 2858bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2859bfff6873SLukas Czerner 2860bfff6873SLukas Czerner return 0; 2861bfff6873SLukas Czerner } 2862bfff6873SLukas Czerner 2863bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2864bfff6873SLukas Czerner { 2865bfff6873SLukas Czerner struct list_head *pos, *n; 2866bfff6873SLukas Czerner struct ext4_li_request *elr; 2867bfff6873SLukas Czerner 2868bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2869bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2870bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2871bfff6873SLukas Czerner lr_request); 2872bfff6873SLukas Czerner ext4_remove_li_request(elr); 2873bfff6873SLukas Czerner } 2874bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2875bfff6873SLukas Czerner } 2876bfff6873SLukas Czerner 2877bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2878bfff6873SLukas Czerner { 28798f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 28808f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 28818f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 28828f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2883bfff6873SLukas Czerner ext4_clear_request_list(); 2884bfff6873SLukas Czerner kfree(ext4_li_info); 2885bfff6873SLukas Czerner ext4_li_info = NULL; 288692b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2887bfff6873SLukas Czerner "initialization thread\n", 2888bfff6873SLukas Czerner err); 2889bfff6873SLukas Czerner return err; 2890bfff6873SLukas Czerner } 2891bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2892bfff6873SLukas Czerner return 0; 2893bfff6873SLukas Czerner } 2894bfff6873SLukas Czerner 2895bfff6873SLukas Czerner /* 2896bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2897bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2898bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2899bfff6873SLukas Czerner * groups and return total number of groups. 2900bfff6873SLukas Czerner */ 2901bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2902bfff6873SLukas Czerner { 2903bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2904bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2905bfff6873SLukas Czerner 2906bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2907bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2908bfff6873SLukas Czerner if (!gdp) 2909bfff6873SLukas Czerner continue; 2910bfff6873SLukas Czerner 2911bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2912bfff6873SLukas Czerner break; 2913bfff6873SLukas Czerner } 2914bfff6873SLukas Czerner 2915bfff6873SLukas Czerner return group; 2916bfff6873SLukas Czerner } 2917bfff6873SLukas Czerner 2918bfff6873SLukas Czerner static int ext4_li_info_new(void) 2919bfff6873SLukas Czerner { 2920bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2921bfff6873SLukas Czerner 2922bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2923bfff6873SLukas Czerner if (!eli) 2924bfff6873SLukas Czerner return -ENOMEM; 2925bfff6873SLukas Czerner 2926bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2927bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2928bfff6873SLukas Czerner 2929bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2930bfff6873SLukas Czerner 2931bfff6873SLukas Czerner ext4_li_info = eli; 2932bfff6873SLukas Czerner 2933bfff6873SLukas Czerner return 0; 2934bfff6873SLukas Czerner } 2935bfff6873SLukas Czerner 2936bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2937bfff6873SLukas Czerner ext4_group_t start) 2938bfff6873SLukas Czerner { 2939bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2940bfff6873SLukas Czerner struct ext4_li_request *elr; 2941bfff6873SLukas Czerner unsigned long rnd; 2942bfff6873SLukas Czerner 2943bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2944bfff6873SLukas Czerner if (!elr) 2945bfff6873SLukas Czerner return NULL; 2946bfff6873SLukas Czerner 2947bfff6873SLukas Czerner elr->lr_super = sb; 2948bfff6873SLukas Czerner elr->lr_sbi = sbi; 2949bfff6873SLukas Czerner elr->lr_next_group = start; 2950bfff6873SLukas Czerner 2951bfff6873SLukas Czerner /* 2952bfff6873SLukas Czerner * Randomize first schedule time of the request to 2953bfff6873SLukas Czerner * spread the inode table initialization requests 2954bfff6873SLukas Czerner * better. 2955bfff6873SLukas Czerner */ 2956bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2957bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2958bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2959bfff6873SLukas Czerner 2960bfff6873SLukas Czerner return elr; 2961bfff6873SLukas Czerner } 2962bfff6873SLukas Czerner 29637f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 2964bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2965bfff6873SLukas Czerner { 2966bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 29677f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 2968bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 29696c5a6cb9SAndrew Morton int ret = 0; 2970bfff6873SLukas Czerner 29717f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 297251ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 297351ce6511SLukas Czerner /* 297451ce6511SLukas Czerner * Reset timeout so it can be computed again, because 297551ce6511SLukas Czerner * s_li_wait_mult might have changed. 297651ce6511SLukas Czerner */ 297751ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 29787f511862STheodore Ts'o goto out; 297951ce6511SLukas Czerner } 2980bfff6873SLukas Czerner 2981bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2982bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 298355ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 29847f511862STheodore Ts'o goto out; 2985bfff6873SLukas Czerner 2986bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 29877f511862STheodore Ts'o if (!elr) { 29887f511862STheodore Ts'o ret = -ENOMEM; 29897f511862STheodore Ts'o goto out; 29907f511862STheodore Ts'o } 2991bfff6873SLukas Czerner 2992bfff6873SLukas Czerner if (NULL == ext4_li_info) { 2993bfff6873SLukas Czerner ret = ext4_li_info_new(); 2994bfff6873SLukas Czerner if (ret) 2995bfff6873SLukas Czerner goto out; 2996bfff6873SLukas Czerner } 2997bfff6873SLukas Czerner 2998bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2999bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3000bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3001bfff6873SLukas Czerner 3002bfff6873SLukas Czerner sbi->s_li_request = elr; 300346e4690bSTao Ma /* 300446e4690bSTao Ma * set elr to NULL here since it has been inserted to 300546e4690bSTao Ma * the request_list and the removal and free of it is 300646e4690bSTao Ma * handled by ext4_clear_request_list from now on. 300746e4690bSTao Ma */ 300846e4690bSTao Ma elr = NULL; 3009bfff6873SLukas Czerner 3010bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3011bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3012bfff6873SLukas Czerner if (ret) 3013bfff6873SLukas Czerner goto out; 3014bfff6873SLukas Czerner } 3015bfff6873SLukas Czerner out: 3016bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3017beed5ecbSNicolas Kaiser if (ret) 3018bfff6873SLukas Czerner kfree(elr); 3019bfff6873SLukas Czerner return ret; 3020bfff6873SLukas Czerner } 3021bfff6873SLukas Czerner 3022bfff6873SLukas Czerner /* 3023bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3024bfff6873SLukas Czerner * module unload. 3025bfff6873SLukas Czerner */ 3026bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3027bfff6873SLukas Czerner { 3028bfff6873SLukas Czerner /* 3029bfff6873SLukas Czerner * If thread exited earlier 3030bfff6873SLukas Czerner * there's nothing to be done. 3031bfff6873SLukas Czerner */ 30328f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3033bfff6873SLukas Czerner return; 3034bfff6873SLukas Czerner 30358f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3036bfff6873SLukas Czerner } 3037bfff6873SLukas Czerner 303825ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 303925ed6e8aSDarrick J. Wong { 304025ed6e8aSDarrick J. Wong int ret = 1; 304125ed6e8aSDarrick J. Wong int compat, incompat; 304225ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 304325ed6e8aSDarrick J. Wong 304425ed6e8aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 304525ed6e8aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 304625ed6e8aSDarrick J. Wong /* journal checksum v2 */ 304725ed6e8aSDarrick J. Wong compat = 0; 304825ed6e8aSDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V2; 304925ed6e8aSDarrick J. Wong } else { 305025ed6e8aSDarrick J. Wong /* journal checksum v1 */ 305125ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 305225ed6e8aSDarrick J. Wong incompat = 0; 305325ed6e8aSDarrick J. Wong } 305425ed6e8aSDarrick J. Wong 305525ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 305625ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 305725ed6e8aSDarrick J. Wong compat, 0, 305825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 305925ed6e8aSDarrick J. Wong incompat); 306025ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 306125ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 306225ed6e8aSDarrick J. Wong compat, 0, 306325ed6e8aSDarrick J. Wong incompat); 306425ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 306525ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 306625ed6e8aSDarrick J. Wong } else { 306725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 306825ed6e8aSDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 306925ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 307025ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 307125ed6e8aSDarrick J. Wong } 307225ed6e8aSDarrick J. Wong 307325ed6e8aSDarrick J. Wong return ret; 307425ed6e8aSDarrick J. Wong } 307525ed6e8aSDarrick J. Wong 3076952fc18eSTheodore Ts'o /* 3077952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3078952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3079952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3080952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3081952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3082952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3083952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3084952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3085952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3086952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3087952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3088952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3089952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3090952fc18eSTheodore Ts'o */ 3091952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3092952fc18eSTheodore Ts'o char *buf) 3093952fc18eSTheodore Ts'o { 3094952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3095952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3096952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3097952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3098952fc18eSTheodore Ts'o int s, j, count = 0; 3099952fc18eSTheodore Ts'o 31000548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 31010548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 31020548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 31030548bbb8STheodore Ts'o 3104952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3105952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3106952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3107952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3108952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3109952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3110952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3111952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3112952fc18eSTheodore Ts'o count++; 3113952fc18eSTheodore Ts'o } 3114952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3115952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3116952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3117952fc18eSTheodore Ts'o count++; 3118952fc18eSTheodore Ts'o } 3119952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3120952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3121952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3122952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3123952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3124952fc18eSTheodore Ts'o count++; 3125952fc18eSTheodore Ts'o } 3126952fc18eSTheodore Ts'o if (i != grp) 3127952fc18eSTheodore Ts'o continue; 3128952fc18eSTheodore Ts'o s = 0; 3129952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3130952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3131952fc18eSTheodore Ts'o count++; 3132952fc18eSTheodore Ts'o } 3133952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3134952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3135952fc18eSTheodore Ts'o count++; 3136952fc18eSTheodore Ts'o } 3137952fc18eSTheodore Ts'o } 3138952fc18eSTheodore Ts'o if (!count) 3139952fc18eSTheodore Ts'o return 0; 3140952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3141952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3142952fc18eSTheodore Ts'o } 3143952fc18eSTheodore Ts'o 3144952fc18eSTheodore Ts'o /* 3145952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3146952fc18eSTheodore Ts'o */ 3147952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3148952fc18eSTheodore Ts'o { 3149952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3150952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3151952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3152952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3153952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3154952fc18eSTheodore Ts'o 3155952fc18eSTheodore Ts'o if (!buf) 3156952fc18eSTheodore Ts'o return -ENOMEM; 3157952fc18eSTheodore Ts'o 3158952fc18eSTheodore Ts'o /* 3159952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3160952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3161952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3162952fc18eSTheodore Ts'o */ 3163952fc18eSTheodore Ts'o 3164952fc18eSTheodore Ts'o /* 3165952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3166952fc18eSTheodore Ts'o */ 3167952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3168952fc18eSTheodore Ts'o 3169952fc18eSTheodore Ts'o /* 3170952fc18eSTheodore Ts'o * Add the overhead found in each block group 3171952fc18eSTheodore Ts'o */ 3172952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3173952fc18eSTheodore Ts'o int blks; 3174952fc18eSTheodore Ts'o 3175952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3176952fc18eSTheodore Ts'o overhead += blks; 3177952fc18eSTheodore Ts'o if (blks) 3178952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3179952fc18eSTheodore Ts'o cond_resched(); 3180952fc18eSTheodore Ts'o } 31810875a2b4SEric Sandeen /* Add the journal blocks as well */ 31820875a2b4SEric Sandeen if (sbi->s_journal) 3183810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 31840875a2b4SEric Sandeen 3185952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3186952fc18eSTheodore Ts'o smp_wmb(); 3187952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3188952fc18eSTheodore Ts'o return 0; 3189952fc18eSTheodore Ts'o } 3190952fc18eSTheodore Ts'o 3191617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3192ac27a0ecSDave Kleikamp { 3193d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3194ac27a0ecSDave Kleikamp struct buffer_head *bh; 3195617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3196617ba13bSMingming Cao struct ext4_sb_info *sbi; 3197617ba13bSMingming Cao ext4_fsblk_t block; 3198617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 319970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3200ac27a0ecSDave Kleikamp unsigned long offset = 0; 3201ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3202ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3203ac27a0ecSDave Kleikamp struct inode *root; 32049f6200bbSTheodore Ts'o char *cp; 32050390131bSFrank Mayhar const char *descr; 3206dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3207281b5995STheodore Ts'o int blocksize, clustersize; 32084ec11028STheodore Ts'o unsigned int db_count; 32094ec11028STheodore Ts'o unsigned int i; 3210281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3211bd81d8eeSLaurent Vivier __u64 blocks_count; 321207aa2ea1SLukas Czerner int err = 0; 3213b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3214bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3215ac27a0ecSDave Kleikamp 3216ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3217ac27a0ecSDave Kleikamp if (!sbi) 3218dcc7dae3SCyrill Gorcunov goto out_free_orig; 3219705895b6SPekka Enberg 3220705895b6SPekka Enberg sbi->s_blockgroup_lock = 3221705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3222705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3223705895b6SPekka Enberg kfree(sbi); 3224dcc7dae3SCyrill Gorcunov goto out_free_orig; 3225705895b6SPekka Enberg } 3226ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 32272c0544b2STheodore Ts'o sbi->s_sb = sb; 3228240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3229d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3230f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3231f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3232f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3233ac27a0ecSDave Kleikamp 32349f6200bbSTheodore Ts'o /* Cleanup superblock name */ 32359f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 32369f6200bbSTheodore Ts'o *cp = '!'; 32379f6200bbSTheodore Ts'o 323807aa2ea1SLukas Czerner /* -EINVAL is default */ 3239dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3240617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3241ac27a0ecSDave Kleikamp if (!blocksize) { 3242b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3243ac27a0ecSDave Kleikamp goto out_fail; 3244ac27a0ecSDave Kleikamp } 3245ac27a0ecSDave Kleikamp 3246ac27a0ecSDave Kleikamp /* 3247617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3248ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3249ac27a0ecSDave Kleikamp */ 3250617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 325170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 325270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3253ac27a0ecSDave Kleikamp } else { 325470bbb3e0SAndrew Morton logical_sb_block = sb_block; 3255ac27a0ecSDave Kleikamp } 3256ac27a0ecSDave Kleikamp 325770bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3258b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3259ac27a0ecSDave Kleikamp goto out_fail; 3260ac27a0ecSDave Kleikamp } 3261ac27a0ecSDave Kleikamp /* 3262ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3263617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3264ac27a0ecSDave Kleikamp */ 32652716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3266ac27a0ecSDave Kleikamp sbi->s_es = es; 3267ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3268617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3269617ba13bSMingming Cao goto cantfind_ext4; 3270afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3271ac27a0ecSDave Kleikamp 3272feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3273feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3274feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3275feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3276feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3277feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3278feb0ab32SDarrick J. Wong 3279d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3280d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3281d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3282d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3283d25425f8SDarrick J. Wong silent = 1; 3284d25425f8SDarrick J. Wong goto cantfind_ext4; 3285d25425f8SDarrick J. Wong } 3286d25425f8SDarrick J. Wong 32870441984aSDarrick J. Wong /* Load the checksum driver */ 32880441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 32890441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 32900441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 32910441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 32920441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 32930441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 32940441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 32950441984aSDarrick J. Wong goto failed_mount; 32960441984aSDarrick J. Wong } 32970441984aSDarrick J. Wong } 32980441984aSDarrick J. Wong 3299a9c47317SDarrick J. Wong /* Check superblock checksum */ 3300a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3301a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3302a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3303a9c47317SDarrick J. Wong silent = 1; 3304a9c47317SDarrick J. Wong goto cantfind_ext4; 3305a9c47317SDarrick J. Wong } 3306a9c47317SDarrick J. Wong 3307a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3308a9c47317SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3309a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 3310a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3311a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3312a9c47317SDarrick J. Wong 3313ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3314ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3315fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3316617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3317fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 331887f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3319fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3320617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3321fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3322ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3323fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 332403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3325fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 33262e7842b8SHugh Dickins #endif 3327617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3328fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3329617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3330fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3331617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3332fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3333ac27a0ecSDave Kleikamp 3334617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3335fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3336bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3337fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3338bb4f397aSAneesh Kumar K.V else 3339fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 33408b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3341fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 33428b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3343fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3344ac27a0ecSDave Kleikamp 334508cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 334608cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 334730773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 334830773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 334930773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3350ac27a0ecSDave Kleikamp 33518b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3352fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3353ac27a0ecSDave Kleikamp 33541e2462f9SMingming Cao /* 3355dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3356dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3357dd919b98SAneesh Kumar K.V */ 3358bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 33598b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3360fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3361dd919b98SAneesh Kumar K.V 336251ce6511SLukas Czerner /* 336351ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 336451ce6511SLukas Czerner * no mount option specified. 336551ce6511SLukas Czerner */ 336651ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 336751ce6511SLukas Czerner 33688b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3369661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 33708b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 33718b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 33728b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 33738b67f04aSTheodore Ts'o } 33745a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3375b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3376661aa520SEric Sandeen &journal_ioprio, 0)) 3377ac27a0ecSDave Kleikamp goto failed_mount; 3378ac27a0ecSDave Kleikamp 337956889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 338056889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 338156889787STheodore Ts'o "with data=journal disables delayed " 338256889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 338356889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 338456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 338556889787STheodore Ts'o "both data=journal and delalloc"); 338656889787STheodore Ts'o goto failed_mount; 338756889787STheodore Ts'o } 338856889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 338956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 339056889787STheodore Ts'o "both data=journal and delalloc"); 339156889787STheodore Ts'o goto failed_mount; 339256889787STheodore Ts'o } 339356889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 339456889787STheodore Ts'o clear_opt(sb, DELALLOC); 339556889787STheodore Ts'o } 339656889787STheodore Ts'o 3397ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3398482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3399ac27a0ecSDave Kleikamp 3400617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3401617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3402617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3403617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3404b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3405b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3406b31e1552SEric Sandeen "running e2fsck is recommended"); 3407469108ffSTheodore Tso 34082035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 34092035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 34102035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 34112035e776STheodore Ts'o "using the ext4 subsystem"); 34122035e776STheodore Ts'o else { 34132035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 34142035e776STheodore Ts'o "to feature incompatibilities"); 34152035e776STheodore Ts'o goto failed_mount; 34162035e776STheodore Ts'o } 34172035e776STheodore Ts'o } 34182035e776STheodore Ts'o 34192035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 34202035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 34212035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 34222035e776STheodore Ts'o "using the ext4 subsystem"); 34232035e776STheodore Ts'o else { 34242035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 34252035e776STheodore Ts'o "to feature incompatibilities"); 34262035e776STheodore Ts'o goto failed_mount; 34272035e776STheodore Ts'o } 34282035e776STheodore Ts'o } 34292035e776STheodore Ts'o 3430469108ffSTheodore Tso /* 3431ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3432ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3433ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3434ac27a0ecSDave Kleikamp */ 3435a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3436ac27a0ecSDave Kleikamp goto failed_mount; 3437a13fb1a4SEric Sandeen 3438261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3439617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3440617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3441b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3442b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3443ac27a0ecSDave Kleikamp goto failed_mount; 3444ac27a0ecSDave Kleikamp } 3445ac27a0ecSDave Kleikamp 3446ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3447ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3448ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3449b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3450ce40733cSAneesh Kumar K.V blocksize); 3451ac27a0ecSDave Kleikamp goto failed_mount; 3452ac27a0ecSDave Kleikamp } 3453ac27a0ecSDave Kleikamp 3454ac27a0ecSDave Kleikamp brelse(bh); 345570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 345670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 345770bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3458ac27a0ecSDave Kleikamp if (!bh) { 3459b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3460b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3461ac27a0ecSDave Kleikamp goto failed_mount; 3462ac27a0ecSDave Kleikamp } 34632716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3464ac27a0ecSDave Kleikamp sbi->s_es = es; 3465617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3466b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3467b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3468ac27a0ecSDave Kleikamp goto failed_mount; 3469ac27a0ecSDave Kleikamp } 3470ac27a0ecSDave Kleikamp } 3471ac27a0ecSDave Kleikamp 3472a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3473a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3474f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3475f287a1a5STheodore Ts'o has_huge_files); 3476f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3477ac27a0ecSDave Kleikamp 3478617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3479617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3480617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3481ac27a0ecSDave Kleikamp } else { 3482ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3483ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3484617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 34851330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3486ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3487b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3488b31e1552SEric Sandeen "unsupported inode size: %d", 3489ac27a0ecSDave Kleikamp sbi->s_inode_size); 3490ac27a0ecSDave Kleikamp goto failed_mount; 3491ac27a0ecSDave Kleikamp } 3492ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3493ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3494ac27a0ecSDave Kleikamp } 34950b8e58a1SAndreas Dilger 34960d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 34970d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 34988fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 34990d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3500d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3501b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3502b31e1552SEric Sandeen "unsupported descriptor size %lu", 35030d1ee42fSAlexandre Ratchov sbi->s_desc_size); 35040d1ee42fSAlexandre Ratchov goto failed_mount; 35050d1ee42fSAlexandre Ratchov } 35060d1ee42fSAlexandre Ratchov } else 35070d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 35080b8e58a1SAndreas Dilger 3509ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3510ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3511b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3512617ba13bSMingming Cao goto cantfind_ext4; 35130b8e58a1SAndreas Dilger 3514617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3515ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3516617ba13bSMingming Cao goto cantfind_ext4; 3517ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3518ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 35190d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3520ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3521ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3522e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3523e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 35240b8e58a1SAndreas Dilger 3525ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3526ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3527ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3528f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3529f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3530f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3531f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3532f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3533f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3534f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3535f99b2589STheodore Ts'o #else 3536f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3537f99b2589STheodore Ts'o #endif 3538f99b2589STheodore Ts'o } 3539ac27a0ecSDave Kleikamp 3540281b5995STheodore Ts'o /* Handle clustersize */ 3541281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3542281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3543281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3544281b5995STheodore Ts'o if (has_bigalloc) { 3545281b5995STheodore Ts'o if (clustersize < blocksize) { 3546281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3547281b5995STheodore Ts'o "cluster size (%d) smaller than " 3548281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3549281b5995STheodore Ts'o goto failed_mount; 3550281b5995STheodore Ts'o } 3551281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3552281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3553281b5995STheodore Ts'o sbi->s_clusters_per_group = 3554281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3555281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3556281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3557281b5995STheodore Ts'o "#clusters per group too big: %lu", 3558281b5995STheodore Ts'o sbi->s_clusters_per_group); 3559281b5995STheodore Ts'o goto failed_mount; 3560281b5995STheodore Ts'o } 3561281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3562281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3563281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3564281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3565281b5995STheodore Ts'o sbi->s_blocks_per_group, 3566281b5995STheodore Ts'o sbi->s_clusters_per_group); 3567281b5995STheodore Ts'o goto failed_mount; 3568281b5995STheodore Ts'o } 3569281b5995STheodore Ts'o } else { 3570281b5995STheodore Ts'o if (clustersize != blocksize) { 3571281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3572281b5995STheodore Ts'o "block size (%d)", clustersize, 3573281b5995STheodore Ts'o blocksize); 3574281b5995STheodore Ts'o clustersize = blocksize; 3575281b5995STheodore Ts'o } 3576ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3577b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3578b31e1552SEric Sandeen "#blocks per group too big: %lu", 3579ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3580ac27a0ecSDave Kleikamp goto failed_mount; 3581ac27a0ecSDave Kleikamp } 3582281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3583281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3584281b5995STheodore Ts'o } 3585281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3586281b5995STheodore Ts'o 3587ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3588b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3589b31e1552SEric Sandeen "#inodes per group too big: %lu", 3590ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3591ac27a0ecSDave Kleikamp goto failed_mount; 3592ac27a0ecSDave Kleikamp } 3593ac27a0ecSDave Kleikamp 3594bf43d84bSEric Sandeen /* 3595bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3596bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3597bf43d84bSEric Sandeen */ 35985a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 359930ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 36005a9ae68aSDarrick J. Wong if (err) { 3601b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3602bf43d84bSEric Sandeen " too large to mount safely on this system"); 3603ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 360490c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3605ac27a0ecSDave Kleikamp goto failed_mount; 3606ac27a0ecSDave Kleikamp } 3607ac27a0ecSDave Kleikamp 3608617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3609617ba13bSMingming Cao goto cantfind_ext4; 3610e7c95593SEric Sandeen 36110f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 36120f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 36130f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3614b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3615b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 36160f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 36170f2ddca6SFrom: Thiemo Nagel goto failed_mount; 36180f2ddca6SFrom: Thiemo Nagel } 36190f2ddca6SFrom: Thiemo Nagel 36204ec11028STheodore Ts'o /* 36214ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 36224ec11028STheodore Ts'o * of the filesystem. 36234ec11028STheodore Ts'o */ 36244ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3625b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3626b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3627e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 36284ec11028STheodore Ts'o ext4_blocks_count(es)); 3629e7c95593SEric Sandeen goto failed_mount; 3630e7c95593SEric Sandeen } 3631bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3632bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3633bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3634bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 36354ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3636b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 36374ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3638b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 36394ec11028STheodore Ts'o ext4_blocks_count(es), 36404ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 36414ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 36424ec11028STheodore Ts'o goto failed_mount; 36434ec11028STheodore Ts'o } 3644bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3645fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3646fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3647617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3648617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3649f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3650f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3651ac27a0ecSDave Kleikamp GFP_KERNEL); 3652ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3653b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 36542cde417dSTheodore Ts'o ret = -ENOMEM; 3655ac27a0ecSDave Kleikamp goto failed_mount; 3656ac27a0ecSDave Kleikamp } 3657ac27a0ecSDave Kleikamp 36589f6200bbSTheodore Ts'o if (ext4_proc_root) 36599f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3660240799cdSTheodore Ts'o 366166acdcf4STheodore Ts'o if (sbi->s_proc) 366266acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 366366acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 366466acdcf4STheodore Ts'o 3665705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3666ac27a0ecSDave Kleikamp 3667ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 366870bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3669ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3670ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3671b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3672b31e1552SEric Sandeen "can't read group descriptor %d", i); 3673ac27a0ecSDave Kleikamp db_count = i; 3674ac27a0ecSDave Kleikamp goto failed_mount2; 3675ac27a0ecSDave Kleikamp } 3676ac27a0ecSDave Kleikamp } 3677bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3678b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3679ac27a0ecSDave Kleikamp goto failed_mount2; 3680ac27a0ecSDave Kleikamp } 3681772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3682772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3683b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3684b31e1552SEric Sandeen "unable to initialize " 3685b31e1552SEric Sandeen "flex_bg meta info!"); 3686772cb7c8SJose R. Santos goto failed_mount2; 3687772cb7c8SJose R. Santos } 3688772cb7c8SJose R. Santos 3689ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3690ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3691ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3692ac27a0ecSDave Kleikamp 369304496411STao Ma init_timer(&sbi->s_err_report); 369404496411STao Ma sbi->s_err_report.function = print_daily_error_info; 369504496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 369604496411STao Ma 369757042651STheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, 36985dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3699ce7e010aSTheodore Ts'o if (!err) { 3700ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3701ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3702ce7e010aSTheodore Ts'o } 3703ce7e010aSTheodore Ts'o if (!err) { 3704ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3705ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3706ce7e010aSTheodore Ts'o } 3707ce7e010aSTheodore Ts'o if (!err) { 370857042651STheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 3709ce7e010aSTheodore Ts'o } 37101ac6466fSTheodore Ts'o if (!err) { 37111ac6466fSTheodore Ts'o err = percpu_counter_init(&sbi->s_extent_cache_cnt, 0); 37121ac6466fSTheodore Ts'o } 3713ce7e010aSTheodore Ts'o if (err) { 3714ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3715ce7e010aSTheodore Ts'o goto failed_mount3; 3716ce7e010aSTheodore Ts'o } 3717ce7e010aSTheodore Ts'o 3718c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 371955138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 372067a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3721c9de560dSAlex Tomas 372274cd15cdSZheng Liu /* Register extent status tree shrinker */ 372374cd15cdSZheng Liu ext4_es_register_shrinker(sb); 372474cd15cdSZheng Liu 3725ac27a0ecSDave Kleikamp /* 3726ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3727ac27a0ecSDave Kleikamp */ 37289ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 37299ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3730617ba13bSMingming Cao sb->s_op = &ext4_sops; 37319ca92389STheodore Ts'o else 37329ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3733617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3734617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3735ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3736617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3737*262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 37387c319d32SAditya Kali sb->s_qcop = &ext4_qctl_sysfile_operations; 3739*262b4662SJan Kara else 3740*262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3741ac27a0ecSDave Kleikamp #endif 3742f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3743f2fa2ffcSAneesh Kumar K.V 3744ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 37453b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3746ac27a0ecSDave Kleikamp 3747ac27a0ecSDave Kleikamp sb->s_root = NULL; 3748ac27a0ecSDave Kleikamp 3749ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3750617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3751617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3752ac27a0ecSDave Kleikamp 3753c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3754c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3755c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3756c5e06d10SJohann Lombardi goto failed_mount3; 3757c5e06d10SJohann Lombardi 3758ac27a0ecSDave Kleikamp /* 3759ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3760ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3761ac27a0ecSDave Kleikamp */ 3762ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3763617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3764617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3765ac27a0ecSDave Kleikamp goto failed_mount3; 37660390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 37670390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3768b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3769b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3770744692dcSJiaying Zhang goto failed_mount_wq; 3771ac27a0ecSDave Kleikamp } else { 3772fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 37730390131bSFrank Mayhar sbi->s_journal = NULL; 37740390131bSFrank Mayhar needs_recovery = 0; 37750390131bSFrank Mayhar goto no_journal; 3776ac27a0ecSDave Kleikamp } 3777ac27a0ecSDave Kleikamp 3778f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3779eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3780eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3781b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3782744692dcSJiaying Zhang goto failed_mount_wq; 3783eb40a09cSJose R. Santos } 3784eb40a09cSJose R. Santos 378525ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 378625ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 378725ed6e8aSDarrick J. Wong "feature set"); 378825ed6e8aSDarrick J. Wong goto failed_mount_wq; 3789d4da6c9cSLinus Torvalds } 3790818d276cSGirish Shilamkar 3791ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3792ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3793ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3794ac27a0ecSDave Kleikamp case 0: 3795ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 379663f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 379763f57933SAndrew Morton * cope, else JOURNAL_DATA 379863f57933SAndrew Morton */ 3799dab291afSMingming Cao if (jbd2_journal_check_available_features 3800dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3801fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3802ac27a0ecSDave Kleikamp else 3803fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3804ac27a0ecSDave Kleikamp break; 3805ac27a0ecSDave Kleikamp 3806617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3807617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3808dab291afSMingming Cao if (!jbd2_journal_check_available_features 3809dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3810b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3811b31e1552SEric Sandeen "requested data journaling mode"); 3812744692dcSJiaying Zhang goto failed_mount_wq; 3813ac27a0ecSDave Kleikamp } 3814ac27a0ecSDave Kleikamp default: 3815ac27a0ecSDave Kleikamp break; 3816ac27a0ecSDave Kleikamp } 3817b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3818ac27a0ecSDave Kleikamp 381918aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 382018aadd47SBobi Jam 3821ce7e010aSTheodore Ts'o /* 3822ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3823ce7e010aSTheodore Ts'o * need to update the global counters. 3824ce7e010aSTheodore Ts'o */ 382557042651STheodore Ts'o percpu_counter_set(&sbi->s_freeclusters_counter, 38265dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3827ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 382884061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3829ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 383084061e07SDmitry Monakhov ext4_count_dirs(sb)); 383157042651STheodore Ts'o percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); 3832206f7ab4SChristoph Hellwig 3833ce7e010aSTheodore Ts'o no_journal: 3834fd89d5f2STejun Heo /* 3835952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 3836952fc18eSTheodore Ts'o * superblock if present. 3837952fc18eSTheodore Ts'o */ 3838952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 3839952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 3840952fc18eSTheodore Ts'o else { 384107aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 384207aa2ea1SLukas Czerner if (err) 3843952fc18eSTheodore Ts'o goto failed_mount_wq; 3844952fc18eSTheodore Ts'o } 3845952fc18eSTheodore Ts'o 3846952fc18eSTheodore Ts'o /* 3847fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3848fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3849fd89d5f2STejun Heo */ 3850fd89d5f2STejun Heo EXT4_SB(sb)->dio_unwritten_wq = 3851ae005cbeSLinus Torvalds alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 38524c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 38534c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 385407aa2ea1SLukas Czerner ret = -ENOMEM; 38554c0425ffSMingming Cao goto failed_mount_wq; 38564c0425ffSMingming Cao } 38574c0425ffSMingming Cao 3858ac27a0ecSDave Kleikamp /* 3859dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3860ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3861ac27a0ecSDave Kleikamp */ 3862ac27a0ecSDave Kleikamp 38631d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 38641d1fe1eeSDavid Howells if (IS_ERR(root)) { 3865b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 38661d1fe1eeSDavid Howells ret = PTR_ERR(root); 386732a9bb57SManish Katiyar root = NULL; 3868ac27a0ecSDave Kleikamp goto failed_mount4; 3869ac27a0ecSDave Kleikamp } 3870ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3871b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 387294bf608aSAl Viro iput(root); 3873ac27a0ecSDave Kleikamp goto failed_mount4; 3874ac27a0ecSDave Kleikamp } 387548fde701SAl Viro sb->s_root = d_make_root(root); 38761d1fe1eeSDavid Howells if (!sb->s_root) { 3877b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 38781d1fe1eeSDavid Howells ret = -ENOMEM; 38791d1fe1eeSDavid Howells goto failed_mount4; 38801d1fe1eeSDavid Howells } 3881ac27a0ecSDave Kleikamp 38827e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 38837e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 3884ef7f3835SKalpak Shah 3885ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3886ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3887ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3888ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3889ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3890ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3891ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3892ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3893ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3894ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3895ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3896ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3897ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3898ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3899ef7f3835SKalpak Shah } 3900ef7f3835SKalpak Shah } 3901ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3902ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3903ef7f3835SKalpak Shah sbi->s_inode_size) { 3904ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3905ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3906b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3907b31e1552SEric Sandeen "available"); 3908ef7f3835SKalpak Shah } 3909ef7f3835SKalpak Shah 39106fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 39116fd058f7STheodore Ts'o if (err) { 3912b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3913fbe845ddSCurt Wohlgemuth "zone (%d)", err); 391494bf608aSAl Viro goto failed_mount4a; 39156fd058f7STheodore Ts'o } 39166fd058f7STheodore Ts'o 3917c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 39189d99012fSAkira Fujita err = ext4_mb_init(sb); 3919c2774d84SAneesh Kumar K.V if (err) { 3920421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3921c2774d84SAneesh Kumar K.V err); 3922dcf2d804STao Ma goto failed_mount5; 3923c2774d84SAneesh Kumar K.V } 3924c2774d84SAneesh Kumar K.V 3925bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3926bfff6873SLukas Czerner if (err) 3927dcf2d804STao Ma goto failed_mount6; 3928bfff6873SLukas Czerner 39293197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 39303197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 39313197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 39323197ebdbSTheodore Ts'o "%s", sb->s_id); 3933dcf2d804STao Ma if (err) 3934dcf2d804STao Ma goto failed_mount7; 39353197ebdbSTheodore Ts'o 3936617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3937617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3938617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 39390390131bSFrank Mayhar if (needs_recovery) { 3940b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3941617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 39420390131bSFrank Mayhar } 39430390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 39440390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 39450390131bSFrank Mayhar descr = " journalled data mode"; 39460390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 39470390131bSFrank Mayhar descr = " ordered data mode"; 39480390131bSFrank Mayhar else 39490390131bSFrank Mayhar descr = " writeback data mode"; 39500390131bSFrank Mayhar } else 39510390131bSFrank Mayhar descr = "out journal"; 39520390131bSFrank Mayhar 39537c319d32SAditya Kali #ifdef CONFIG_QUOTA 39547c319d32SAditya Kali /* Enable quota usage during mount. */ 39557c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 39567c319d32SAditya Kali !(sb->s_flags & MS_RDONLY)) { 395707aa2ea1SLukas Czerner err = ext4_enable_quotas(sb); 395807aa2ea1SLukas Czerner if (err) 395972ba7450STheodore Ts'o goto failed_mount8; 39607c319d32SAditya Kali } 39617c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 39627c319d32SAditya Kali 396379add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 396479add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 396579add3a3SLukas Czerner if (!blk_queue_discard(q)) 396679add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 396779add3a3SLukas Czerner "mounting with \"discard\" option, but " 396879add3a3SLukas Czerner "the device does not support discard"); 396979add3a3SLukas Czerner } 397079add3a3SLukas Czerner 3971d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 39728b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 39738b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3974ac27a0ecSDave Kleikamp 397566e61a9eSTheodore Ts'o if (es->s_error_count) 397666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3977ac27a0ecSDave Kleikamp 3978d4c402d9SCurt Wohlgemuth kfree(orig_data); 3979ac27a0ecSDave Kleikamp return 0; 3980ac27a0ecSDave Kleikamp 3981617ba13bSMingming Cao cantfind_ext4: 3982ac27a0ecSDave Kleikamp if (!silent) 3983b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3984ac27a0ecSDave Kleikamp goto failed_mount; 3985ac27a0ecSDave Kleikamp 398672ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 398772ba7450STheodore Ts'o failed_mount8: 398872ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 398972ba7450STheodore Ts'o #endif 3990dcf2d804STao Ma failed_mount7: 3991dcf2d804STao Ma ext4_unregister_li_request(sb); 3992dcf2d804STao Ma failed_mount6: 3993dcf2d804STao Ma ext4_mb_release(sb); 399494bf608aSAl Viro failed_mount5: 399594bf608aSAl Viro ext4_ext_release(sb); 3996dcf2d804STao Ma ext4_release_system_zone(sb); 399794bf608aSAl Viro failed_mount4a: 399894bf608aSAl Viro dput(sb->s_root); 399932a9bb57SManish Katiyar sb->s_root = NULL; 400094bf608aSAl Viro failed_mount4: 4001b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 40024c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 40034c0425ffSMingming Cao failed_mount_wq: 40040390131bSFrank Mayhar if (sbi->s_journal) { 4005dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 400647b4a50bSJan Kara sbi->s_journal = NULL; 40070390131bSFrank Mayhar } 4008ac27a0ecSDave Kleikamp failed_mount3: 400904496411STao Ma del_timer(&sbi->s_err_report); 40109933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 40119933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 401257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4013ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4014ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 401557042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 40161ac6466fSTheodore Ts'o percpu_counter_destroy(&sbi->s_extent_cache_cnt); 4017c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4018c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4019ac27a0ecSDave Kleikamp failed_mount2: 4020ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4021ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4022f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4023ac27a0ecSDave Kleikamp failed_mount: 40240441984aSDarrick J. Wong if (sbi->s_chksum_driver) 40250441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4026240799cdSTheodore Ts'o if (sbi->s_proc) { 402766acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 40289f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4029240799cdSTheodore Ts'o } 4030ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4031ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4032ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4033ac27a0ecSDave Kleikamp #endif 4034617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4035ac27a0ecSDave Kleikamp brelse(bh); 4036ac27a0ecSDave Kleikamp out_fail: 4037ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4038f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4039ac27a0ecSDave Kleikamp kfree(sbi); 4040dcc7dae3SCyrill Gorcunov out_free_orig: 4041d4c402d9SCurt Wohlgemuth kfree(orig_data); 404207aa2ea1SLukas Czerner return err ? err : ret; 4043ac27a0ecSDave Kleikamp } 4044ac27a0ecSDave Kleikamp 4045ac27a0ecSDave Kleikamp /* 4046ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4047ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4048ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4049ac27a0ecSDave Kleikamp */ 4050617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4051ac27a0ecSDave Kleikamp { 4052617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4053ac27a0ecSDave Kleikamp 4054ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 405530773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 405630773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4057ac27a0ecSDave Kleikamp 4058a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4059ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4060dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4061ac27a0ecSDave Kleikamp else 4062dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 40635bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 40645bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 40655bf5683aSHidehiro Kawai else 40665bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4067a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4068ac27a0ecSDave Kleikamp } 4069ac27a0ecSDave Kleikamp 4070617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4071ac27a0ecSDave Kleikamp unsigned int journal_inum) 4072ac27a0ecSDave Kleikamp { 4073ac27a0ecSDave Kleikamp struct inode *journal_inode; 4074ac27a0ecSDave Kleikamp journal_t *journal; 4075ac27a0ecSDave Kleikamp 40760390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 40770390131bSFrank Mayhar 4078ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4079ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4080ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4081ac27a0ecSDave Kleikamp 40821d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 40831d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4084b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4085ac27a0ecSDave Kleikamp return NULL; 4086ac27a0ecSDave Kleikamp } 4087ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4088ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4089ac27a0ecSDave Kleikamp iput(journal_inode); 4090b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4091ac27a0ecSDave Kleikamp return NULL; 4092ac27a0ecSDave Kleikamp } 4093ac27a0ecSDave Kleikamp 4094e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4095ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 40961d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4097b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4098ac27a0ecSDave Kleikamp iput(journal_inode); 4099ac27a0ecSDave Kleikamp return NULL; 4100ac27a0ecSDave Kleikamp } 4101ac27a0ecSDave Kleikamp 4102dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4103ac27a0ecSDave Kleikamp if (!journal) { 4104b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4105ac27a0ecSDave Kleikamp iput(journal_inode); 4106ac27a0ecSDave Kleikamp return NULL; 4107ac27a0ecSDave Kleikamp } 4108ac27a0ecSDave Kleikamp journal->j_private = sb; 4109617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4110ac27a0ecSDave Kleikamp return journal; 4111ac27a0ecSDave Kleikamp } 4112ac27a0ecSDave Kleikamp 4113617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4114ac27a0ecSDave Kleikamp dev_t j_dev) 4115ac27a0ecSDave Kleikamp { 4116ac27a0ecSDave Kleikamp struct buffer_head *bh; 4117ac27a0ecSDave Kleikamp journal_t *journal; 4118617ba13bSMingming Cao ext4_fsblk_t start; 4119617ba13bSMingming Cao ext4_fsblk_t len; 4120ac27a0ecSDave Kleikamp int hblock, blocksize; 4121617ba13bSMingming Cao ext4_fsblk_t sb_block; 4122ac27a0ecSDave Kleikamp unsigned long offset; 4123617ba13bSMingming Cao struct ext4_super_block *es; 4124ac27a0ecSDave Kleikamp struct block_device *bdev; 4125ac27a0ecSDave Kleikamp 41260390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41270390131bSFrank Mayhar 4128b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4129ac27a0ecSDave Kleikamp if (bdev == NULL) 4130ac27a0ecSDave Kleikamp return NULL; 4131ac27a0ecSDave Kleikamp 4132ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4133e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4134ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4135b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4136b31e1552SEric Sandeen "blocksize too small for journal device"); 4137ac27a0ecSDave Kleikamp goto out_bdev; 4138ac27a0ecSDave Kleikamp } 4139ac27a0ecSDave Kleikamp 4140617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4141617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4142ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4143ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4144b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4145b31e1552SEric Sandeen "external journal"); 4146ac27a0ecSDave Kleikamp goto out_bdev; 4147ac27a0ecSDave Kleikamp } 4148ac27a0ecSDave Kleikamp 41492716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4150617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4151ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4152617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4153b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4154b31e1552SEric Sandeen "bad superblock"); 4155ac27a0ecSDave Kleikamp brelse(bh); 4156ac27a0ecSDave Kleikamp goto out_bdev; 4157ac27a0ecSDave Kleikamp } 4158ac27a0ecSDave Kleikamp 4159617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4160b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4161ac27a0ecSDave Kleikamp brelse(bh); 4162ac27a0ecSDave Kleikamp goto out_bdev; 4163ac27a0ecSDave Kleikamp } 4164ac27a0ecSDave Kleikamp 4165bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4166ac27a0ecSDave Kleikamp start = sb_block + 1; 4167ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4168ac27a0ecSDave Kleikamp 4169dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4170ac27a0ecSDave Kleikamp start, len, blocksize); 4171ac27a0ecSDave Kleikamp if (!journal) { 4172b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4173ac27a0ecSDave Kleikamp goto out_bdev; 4174ac27a0ecSDave Kleikamp } 4175ac27a0ecSDave Kleikamp journal->j_private = sb; 4176ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 4177ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4178ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4179b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4180ac27a0ecSDave Kleikamp goto out_journal; 4181ac27a0ecSDave Kleikamp } 4182ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4183b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4184b31e1552SEric Sandeen "user (unsupported) - %d", 4185ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4186ac27a0ecSDave Kleikamp goto out_journal; 4187ac27a0ecSDave Kleikamp } 4188617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4189617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4190ac27a0ecSDave Kleikamp return journal; 41910b8e58a1SAndreas Dilger 4192ac27a0ecSDave Kleikamp out_journal: 4193dab291afSMingming Cao jbd2_journal_destroy(journal); 4194ac27a0ecSDave Kleikamp out_bdev: 4195617ba13bSMingming Cao ext4_blkdev_put(bdev); 4196ac27a0ecSDave Kleikamp return NULL; 4197ac27a0ecSDave Kleikamp } 4198ac27a0ecSDave Kleikamp 4199617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4200617ba13bSMingming Cao struct ext4_super_block *es, 4201ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4202ac27a0ecSDave Kleikamp { 4203ac27a0ecSDave Kleikamp journal_t *journal; 4204ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4205ac27a0ecSDave Kleikamp dev_t journal_dev; 4206ac27a0ecSDave Kleikamp int err = 0; 4207ac27a0ecSDave Kleikamp int really_read_only; 4208ac27a0ecSDave Kleikamp 42090390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 42100390131bSFrank Mayhar 4211ac27a0ecSDave Kleikamp if (journal_devnum && 4212ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4213b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4214b31e1552SEric Sandeen "numbers have changed"); 4215ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4216ac27a0ecSDave Kleikamp } else 4217ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4218ac27a0ecSDave Kleikamp 4219ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4220ac27a0ecSDave Kleikamp 4221ac27a0ecSDave Kleikamp /* 4222ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4223ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4224ac27a0ecSDave Kleikamp * can get read-write access to the device. 4225ac27a0ecSDave Kleikamp */ 4226617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4227ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4228b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4229b31e1552SEric Sandeen "required on readonly filesystem"); 4230ac27a0ecSDave Kleikamp if (really_read_only) { 4231b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4232b31e1552SEric Sandeen "unavailable, cannot proceed"); 4233ac27a0ecSDave Kleikamp return -EROFS; 4234ac27a0ecSDave Kleikamp } 4235b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4236b31e1552SEric Sandeen "be enabled during recovery"); 4237ac27a0ecSDave Kleikamp } 4238ac27a0ecSDave Kleikamp } 4239ac27a0ecSDave Kleikamp 4240ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4241b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4242b31e1552SEric Sandeen "and inode journals!"); 4243ac27a0ecSDave Kleikamp return -EINVAL; 4244ac27a0ecSDave Kleikamp } 4245ac27a0ecSDave Kleikamp 4246ac27a0ecSDave Kleikamp if (journal_inum) { 4247617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4248ac27a0ecSDave Kleikamp return -EINVAL; 4249ac27a0ecSDave Kleikamp } else { 4250617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4251ac27a0ecSDave Kleikamp return -EINVAL; 4252ac27a0ecSDave Kleikamp } 4253ac27a0ecSDave Kleikamp 425490576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4255b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 42564776004fSTheodore Ts'o 4257617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4258dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 42591c13d5c0STheodore Ts'o if (!err) { 42601c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 42611c13d5c0STheodore Ts'o if (save) 42621c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 42631c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4264dab291afSMingming Cao err = jbd2_journal_load(journal); 42651c13d5c0STheodore Ts'o if (save) 42661c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 42671c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 42681c13d5c0STheodore Ts'o kfree(save); 42691c13d5c0STheodore Ts'o } 4270ac27a0ecSDave Kleikamp 4271ac27a0ecSDave Kleikamp if (err) { 4272b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4273dab291afSMingming Cao jbd2_journal_destroy(journal); 4274ac27a0ecSDave Kleikamp return err; 4275ac27a0ecSDave Kleikamp } 4276ac27a0ecSDave Kleikamp 4277617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4278617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4279ac27a0ecSDave Kleikamp 4280c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4281ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4282ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4283ac27a0ecSDave Kleikamp 4284ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4285e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4286ac27a0ecSDave Kleikamp } 4287ac27a0ecSDave Kleikamp 4288ac27a0ecSDave Kleikamp return 0; 4289ac27a0ecSDave Kleikamp } 4290ac27a0ecSDave Kleikamp 4291e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4292ac27a0ecSDave Kleikamp { 4293e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4294617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4295c4be0c1dSTakashi Sato int error = 0; 4296ac27a0ecSDave Kleikamp 42977c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4298c4be0c1dSTakashi Sato return error; 4299914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4300914258bfSTheodore Ts'o /* 4301914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4302914258bfSTheodore Ts'o * superblock failed. This could happen because the 4303914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4304914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4305914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4306914258bfSTheodore Ts'o * write and hope for the best. 4307914258bfSTheodore Ts'o */ 4308b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4309b31e1552SEric Sandeen "superblock detected"); 4310914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4311914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4312914258bfSTheodore Ts'o } 431371290b36STheodore Ts'o /* 431471290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 431571290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 431671290b36STheodore Ts'o * write time when we are mounting the root file system 431771290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 431871290b36STheodore Ts'o * for people who are east of GMT and who make their clock 431971290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 432071290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 432171290b36STheodore Ts'o * to complain and force a full file system check. 432271290b36STheodore Ts'o */ 432371290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4324ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4325f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4326afc32f7eSTheodore Ts'o es->s_kbytes_written = 4327afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4328afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4329afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4330f613dfcbSTheodore Ts'o else 4331f613dfcbSTheodore Ts'o es->s_kbytes_written = 4332f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 433357042651STheodore Ts'o ext4_free_blocks_count_set(es, 433457042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 433557042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 43367f93cff9STheodore Ts'o es->s_free_inodes_count = 43377f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 43385d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4339ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 434006db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4341ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4342914258bfSTheodore Ts'o if (sync) { 4343c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4344c4be0c1dSTakashi Sato if (error) 4345c4be0c1dSTakashi Sato return error; 4346c4be0c1dSTakashi Sato 4347c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4348c4be0c1dSTakashi Sato if (error) { 4349b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4350b31e1552SEric Sandeen "superblock"); 4351914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4352914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4353914258bfSTheodore Ts'o } 4354914258bfSTheodore Ts'o } 4355c4be0c1dSTakashi Sato return error; 4356ac27a0ecSDave Kleikamp } 4357ac27a0ecSDave Kleikamp 4358ac27a0ecSDave Kleikamp /* 4359ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4360ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4361ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4362ac27a0ecSDave Kleikamp */ 4363617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4364617ba13bSMingming Cao struct ext4_super_block *es) 4365ac27a0ecSDave Kleikamp { 4366617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4367ac27a0ecSDave Kleikamp 43680390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 43690390131bSFrank Mayhar BUG_ON(journal != NULL); 43700390131bSFrank Mayhar return; 43710390131bSFrank Mayhar } 4372dab291afSMingming Cao jbd2_journal_lock_updates(journal); 43737ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 43747ffe1ea8SHidehiro Kawai goto out; 43757ffe1ea8SHidehiro Kawai 4376617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4377ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4378617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4379e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4380ac27a0ecSDave Kleikamp } 43817ffe1ea8SHidehiro Kawai 43827ffe1ea8SHidehiro Kawai out: 4383dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4384ac27a0ecSDave Kleikamp } 4385ac27a0ecSDave Kleikamp 4386ac27a0ecSDave Kleikamp /* 4387ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4388ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4389ac27a0ecSDave Kleikamp * main filesystem now. 4390ac27a0ecSDave Kleikamp */ 4391617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4392617ba13bSMingming Cao struct ext4_super_block *es) 4393ac27a0ecSDave Kleikamp { 4394ac27a0ecSDave Kleikamp journal_t *journal; 4395ac27a0ecSDave Kleikamp int j_errno; 4396ac27a0ecSDave Kleikamp const char *errstr; 4397ac27a0ecSDave Kleikamp 43980390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43990390131bSFrank Mayhar 4400617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4401ac27a0ecSDave Kleikamp 4402ac27a0ecSDave Kleikamp /* 4403ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4404617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4405ac27a0ecSDave Kleikamp */ 4406ac27a0ecSDave Kleikamp 4407dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4408ac27a0ecSDave Kleikamp if (j_errno) { 4409ac27a0ecSDave Kleikamp char nbuf[16]; 4410ac27a0ecSDave Kleikamp 4411617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 441212062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4413ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 441412062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4415ac27a0ecSDave Kleikamp 4416617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4417617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4418e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4419ac27a0ecSDave Kleikamp 4420dab291afSMingming Cao jbd2_journal_clear_err(journal); 4421d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4422ac27a0ecSDave Kleikamp } 4423ac27a0ecSDave Kleikamp } 4424ac27a0ecSDave Kleikamp 4425ac27a0ecSDave Kleikamp /* 4426ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4427ac27a0ecSDave Kleikamp * and wait on the commit. 4428ac27a0ecSDave Kleikamp */ 4429617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4430ac27a0ecSDave Kleikamp { 4431ac27a0ecSDave Kleikamp journal_t *journal; 4432ac27a0ecSDave Kleikamp 4433ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4434ac27a0ecSDave Kleikamp return 0; 4435ac27a0ecSDave Kleikamp 4436617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4437b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4438ac27a0ecSDave Kleikamp } 4439ac27a0ecSDave Kleikamp 4440617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4441ac27a0ecSDave Kleikamp { 444214ce0cb4STheodore Ts'o int ret = 0; 44439eddacf9SJan Kara tid_t target; 44448d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4445ac27a0ecSDave Kleikamp 44469bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 44478d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 4448a1177825SJan Kara /* 4449a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4450a1177825SJan Kara * no dirty dquots 4451a1177825SJan Kara */ 4452a1177825SJan Kara dquot_writeback_dquots(sb, -1); 44538d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4454ac27a0ecSDave Kleikamp if (wait) 44558d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 44560390131bSFrank Mayhar } 445714ce0cb4STheodore Ts'o return ret; 4458ac27a0ecSDave Kleikamp } 4459ac27a0ecSDave Kleikamp 4460ac27a0ecSDave Kleikamp /* 4461ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4462ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4463be4f27d3SYongqiang Yang * 4464be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 44658e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 44668e8ad8a5SJan Kara * modifications. 4467ac27a0ecSDave Kleikamp */ 4468c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4469ac27a0ecSDave Kleikamp { 4470c4be0c1dSTakashi Sato int error = 0; 4471c4be0c1dSTakashi Sato journal_t *journal; 4472ac27a0ecSDave Kleikamp 44739ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 44749ca92389STheodore Ts'o return 0; 44759ca92389STheodore Ts'o 4476c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4477ac27a0ecSDave Kleikamp 4478ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4479dab291afSMingming Cao jbd2_journal_lock_updates(journal); 44807ffe1ea8SHidehiro Kawai 44817ffe1ea8SHidehiro Kawai /* 44829ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 44839ca92389STheodore Ts'o * the journal. 44847ffe1ea8SHidehiro Kawai */ 4485c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 44866b0310fbSEric Sandeen if (error < 0) 44876b0310fbSEric Sandeen goto out; 4488ac27a0ecSDave Kleikamp 4489ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4490617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4491e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 44926b0310fbSEric Sandeen out: 44938e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 44946b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 44956b0310fbSEric Sandeen return error; 4496ac27a0ecSDave Kleikamp } 4497ac27a0ecSDave Kleikamp 4498ac27a0ecSDave Kleikamp /* 4499ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4500ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4501ac27a0ecSDave Kleikamp */ 4502c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4503ac27a0ecSDave Kleikamp { 45049ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 45059ca92389STheodore Ts'o return 0; 45069ca92389STheodore Ts'o 45079ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4508617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4509e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4510c4be0c1dSTakashi Sato return 0; 4511ac27a0ecSDave Kleikamp } 4512ac27a0ecSDave Kleikamp 4513673c6100STheodore Ts'o /* 4514673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4515673c6100STheodore Ts'o */ 4516673c6100STheodore Ts'o struct ext4_mount_options { 4517673c6100STheodore Ts'o unsigned long s_mount_opt; 4518a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 451908cefc7aSEric W. Biederman kuid_t s_resuid; 452008cefc7aSEric W. Biederman kgid_t s_resgid; 4521673c6100STheodore Ts'o unsigned long s_commit_interval; 4522673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4523673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4524673c6100STheodore Ts'o int s_jquota_fmt; 4525673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4526673c6100STheodore Ts'o #endif 4527673c6100STheodore Ts'o }; 4528673c6100STheodore Ts'o 4529617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4530ac27a0ecSDave Kleikamp { 4531617ba13bSMingming Cao struct ext4_super_block *es; 4532617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4533ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4534617ba13bSMingming Cao struct ext4_mount_options old_opts; 4535c79d967dSChristoph Hellwig int enable_quota = 0; 45368a266467STheodore Ts'o ext4_group_t g; 4537b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4538c5e06d10SJohann Lombardi int err = 0; 4539ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 454003dafb5fSChen Gang int i, j; 4541ac27a0ecSDave Kleikamp #endif 4542d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4543ac27a0ecSDave Kleikamp 4544ac27a0ecSDave Kleikamp /* Store the original options */ 4545ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4546ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4547a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4548ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4549ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4550ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 455130773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 455230773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4553ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4554ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4555ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 455603dafb5fSChen Gang if (sbi->s_qf_names[i]) { 455703dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 455803dafb5fSChen Gang GFP_KERNEL); 455903dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 456003dafb5fSChen Gang for (j = 0; j < i; j++) 456103dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 45623e36a163SWei Yongjun kfree(orig_data); 456303dafb5fSChen Gang return -ENOMEM; 456403dafb5fSChen Gang } 456503dafb5fSChen Gang } else 456603dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4567ac27a0ecSDave Kleikamp #endif 4568b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4569b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4570ac27a0ecSDave Kleikamp 4571ac27a0ecSDave Kleikamp /* 4572ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4573ac27a0ecSDave Kleikamp */ 4574661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4575ac27a0ecSDave Kleikamp err = -EINVAL; 4576ac27a0ecSDave Kleikamp goto restore_opts; 4577ac27a0ecSDave Kleikamp } 4578ac27a0ecSDave Kleikamp 45794ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4580c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4581ac27a0ecSDave Kleikamp 4582ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4583482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4584ac27a0ecSDave Kleikamp 4585ac27a0ecSDave Kleikamp es = sbi->s_es; 4586ac27a0ecSDave Kleikamp 4587b3881f74STheodore Ts'o if (sbi->s_journal) { 4588617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4589b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4590b3881f74STheodore Ts'o } 4591ac27a0ecSDave Kleikamp 4592661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 45934ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4594ac27a0ecSDave Kleikamp err = -EROFS; 4595ac27a0ecSDave Kleikamp goto restore_opts; 4596ac27a0ecSDave Kleikamp } 4597ac27a0ecSDave Kleikamp 4598ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 45990f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 46000f0dd62fSChristoph Hellwig if (err < 0) 4601c79d967dSChristoph Hellwig goto restore_opts; 4602c79d967dSChristoph Hellwig 4603ac27a0ecSDave Kleikamp /* 4604ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4605ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4606ac27a0ecSDave Kleikamp */ 4607ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4608ac27a0ecSDave Kleikamp 4609ac27a0ecSDave Kleikamp /* 4610ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4611ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4612ac27a0ecSDave Kleikamp * mark the partition as valid again. 4613ac27a0ecSDave Kleikamp */ 4614617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4615617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4616ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4617ac27a0ecSDave Kleikamp 4618a63c9eb2STheodore Ts'o if (sbi->s_journal) 4619617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4620ac27a0ecSDave Kleikamp } else { 4621a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4622a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4623ac27a0ecSDave Kleikamp err = -EROFS; 4624ac27a0ecSDave Kleikamp goto restore_opts; 4625ac27a0ecSDave Kleikamp } 4626ead6596bSEric Sandeen /* 46278a266467STheodore Ts'o * Make sure the group descriptor checksums 46280b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 46298a266467STheodore Ts'o */ 46308a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 46318a266467STheodore Ts'o struct ext4_group_desc *gdp = 46328a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 46338a266467STheodore Ts'o 4634feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4635b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4636b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 46378a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 46388a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 46398a266467STheodore Ts'o err = -EINVAL; 46408a266467STheodore Ts'o goto restore_opts; 46418a266467STheodore Ts'o } 46428a266467STheodore Ts'o } 46438a266467STheodore Ts'o 46448a266467STheodore Ts'o /* 4645ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4646ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4647ead6596bSEric Sandeen * require a full umount/remount for now. 4648ead6596bSEric Sandeen */ 4649ead6596bSEric Sandeen if (es->s_last_orphan) { 4650b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4651ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4652ead6596bSEric Sandeen "orphan inode list. Please " 4653b31e1552SEric Sandeen "umount/remount instead"); 4654ead6596bSEric Sandeen err = -EINVAL; 4655ead6596bSEric Sandeen goto restore_opts; 4656ead6596bSEric Sandeen } 4657ead6596bSEric Sandeen 4658ac27a0ecSDave Kleikamp /* 4659ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4660ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4661ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4662ac27a0ecSDave Kleikamp * the partition.) 4663ac27a0ecSDave Kleikamp */ 46640390131bSFrank Mayhar if (sbi->s_journal) 4665617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4666ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4667617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4668ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4669c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4670c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4671c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4672c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4673c5e06d10SJohann Lombardi err = -EROFS; 4674c5e06d10SJohann Lombardi goto restore_opts; 4675c5e06d10SJohann Lombardi } 4676c79d967dSChristoph Hellwig enable_quota = 1; 4677ac27a0ecSDave Kleikamp } 4678ac27a0ecSDave Kleikamp } 4679bfff6873SLukas Czerner 4680bfff6873SLukas Czerner /* 4681bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4682bfff6873SLukas Czerner * current settings 4683bfff6873SLukas Czerner */ 4684bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4685bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4686bfff6873SLukas Czerner else { 4687bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4688bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4689bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4690bfff6873SLukas Czerner } 4691bfff6873SLukas Czerner 46926fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4693d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 4694e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 46950390131bSFrank Mayhar 4696ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4697ac27a0ecSDave Kleikamp /* Release old quota file names */ 4698ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4699ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 47007c319d32SAditya Kali if (enable_quota) { 47017c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 47020f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 47037c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 47047c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 47057c319d32SAditya Kali err = ext4_enable_quotas(sb); 470607724f98STheodore Ts'o if (err) 47077c319d32SAditya Kali goto restore_opts; 47087c319d32SAditya Kali } 47097c319d32SAditya Kali } 47107c319d32SAditya Kali #endif 4711d4c402d9SCurt Wohlgemuth 4712d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4713d4c402d9SCurt Wohlgemuth kfree(orig_data); 4714ac27a0ecSDave Kleikamp return 0; 47150b8e58a1SAndreas Dilger 4716ac27a0ecSDave Kleikamp restore_opts: 4717ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4718ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4719a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4720ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4721ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4722ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 472330773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 472430773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4725ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4726ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4727ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4728ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4729ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4730ac27a0ecSDave Kleikamp } 4731ac27a0ecSDave Kleikamp #endif 4732d4c402d9SCurt Wohlgemuth kfree(orig_data); 4733ac27a0ecSDave Kleikamp return err; 4734ac27a0ecSDave Kleikamp } 4735ac27a0ecSDave Kleikamp 4736617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4737ac27a0ecSDave Kleikamp { 4738ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4739617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4740617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4741952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 4742960cc398SPekka Enberg u64 fsid; 4743d02a9391SKazuya Mio s64 bfree; 4744ac27a0ecSDave Kleikamp 4745952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 4746952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 4747ac27a0ecSDave Kleikamp 4748617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4749ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4750b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 475157042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 475257042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4753d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 475457042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 4755bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4756bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4757ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4758ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 475952d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4760617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4761960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4762960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4763960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4764960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 47650b8e58a1SAndreas Dilger 4766ac27a0ecSDave Kleikamp return 0; 4767ac27a0ecSDave Kleikamp } 4768ac27a0ecSDave Kleikamp 47690b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 47700b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4771ac27a0ecSDave Kleikamp * Process 1 Process 2 4772617ba13bSMingming Cao * ext4_create() quota_sync() 4773dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4774871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4775dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4776ac27a0ecSDave Kleikamp * 4777ac27a0ecSDave Kleikamp */ 4778ac27a0ecSDave Kleikamp 4779ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4780ac27a0ecSDave Kleikamp 4781ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4782ac27a0ecSDave Kleikamp { 47834c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 4784ac27a0ecSDave Kleikamp } 4785ac27a0ecSDave Kleikamp 4786617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4787ac27a0ecSDave Kleikamp { 4788ac27a0ecSDave Kleikamp int ret, err; 4789ac27a0ecSDave Kleikamp handle_t *handle; 4790ac27a0ecSDave Kleikamp struct inode *inode; 4791ac27a0ecSDave Kleikamp 4792ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 47939924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 4794617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4795ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4796ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4797ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4798617ba13bSMingming Cao err = ext4_journal_stop(handle); 4799ac27a0ecSDave Kleikamp if (!ret) 4800ac27a0ecSDave Kleikamp ret = err; 4801ac27a0ecSDave Kleikamp return ret; 4802ac27a0ecSDave Kleikamp } 4803ac27a0ecSDave Kleikamp 4804617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4805ac27a0ecSDave Kleikamp { 4806ac27a0ecSDave Kleikamp int ret, err; 4807ac27a0ecSDave Kleikamp handle_t *handle; 4808ac27a0ecSDave Kleikamp 48099924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 4810617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4811ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4812ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4813ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4814617ba13bSMingming Cao err = ext4_journal_stop(handle); 4815ac27a0ecSDave Kleikamp if (!ret) 4816ac27a0ecSDave Kleikamp ret = err; 4817ac27a0ecSDave Kleikamp return ret; 4818ac27a0ecSDave Kleikamp } 4819ac27a0ecSDave Kleikamp 4820617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4821ac27a0ecSDave Kleikamp { 4822ac27a0ecSDave Kleikamp int ret, err; 4823ac27a0ecSDave Kleikamp handle_t *handle; 4824ac27a0ecSDave Kleikamp 48259924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 4826617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 48279c3013e9SJan Kara if (IS_ERR(handle)) { 48289c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 48299c3013e9SJan Kara dquot_release(dquot); 4830ac27a0ecSDave Kleikamp return PTR_ERR(handle); 48319c3013e9SJan Kara } 4832ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4833617ba13bSMingming Cao err = ext4_journal_stop(handle); 4834ac27a0ecSDave Kleikamp if (!ret) 4835ac27a0ecSDave Kleikamp ret = err; 4836ac27a0ecSDave Kleikamp return ret; 4837ac27a0ecSDave Kleikamp } 4838ac27a0ecSDave Kleikamp 4839617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4840ac27a0ecSDave Kleikamp { 4841*262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 4842*262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4843*262b4662SJan Kara 48442c8be6b2SJan Kara /* Are we journaling quotas? */ 4845*262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 4846*262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 4847ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4848617ba13bSMingming Cao return ext4_write_dquot(dquot); 4849ac27a0ecSDave Kleikamp } else { 4850ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4851ac27a0ecSDave Kleikamp } 4852ac27a0ecSDave Kleikamp } 4853ac27a0ecSDave Kleikamp 4854617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4855ac27a0ecSDave Kleikamp { 4856ac27a0ecSDave Kleikamp int ret, err; 4857ac27a0ecSDave Kleikamp handle_t *handle; 4858ac27a0ecSDave Kleikamp 4859ac27a0ecSDave Kleikamp /* Data block + inode block */ 48609924a92aSTheodore Ts'o handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); 4861ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4862ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4863ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4864617ba13bSMingming Cao err = ext4_journal_stop(handle); 4865ac27a0ecSDave Kleikamp if (!ret) 4866ac27a0ecSDave Kleikamp ret = err; 4867ac27a0ecSDave Kleikamp return ret; 4868ac27a0ecSDave Kleikamp } 4869ac27a0ecSDave Kleikamp 4870ac27a0ecSDave Kleikamp /* 4871ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4872ac27a0ecSDave Kleikamp * the quota file and such... 4873ac27a0ecSDave Kleikamp */ 4874617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4875ac27a0ecSDave Kleikamp { 4876287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4877617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4878ac27a0ecSDave Kleikamp } 4879ac27a0ecSDave Kleikamp 4880ac27a0ecSDave Kleikamp /* 4881ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4882ac27a0ecSDave Kleikamp */ 4883617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4884f00c9e44SJan Kara struct path *path) 4885ac27a0ecSDave Kleikamp { 4886ac27a0ecSDave Kleikamp int err; 4887ac27a0ecSDave Kleikamp 4888ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4889ac27a0ecSDave Kleikamp return -EINVAL; 48900623543bSJan Kara 4891ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4892d8c9584eSAl Viro if (path->dentry->d_sb != sb) 4893ac27a0ecSDave Kleikamp return -EXDEV; 48940623543bSJan Kara /* Journaling quota? */ 48950623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 48962b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4897f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4898b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4899b31e1552SEric Sandeen "Quota file not on filesystem root. " 4900b31e1552SEric Sandeen "Journaled quota will not work"); 49010623543bSJan Kara } 49020623543bSJan Kara 49030623543bSJan Kara /* 49040623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 49050623543bSJan Kara * all updates to the file when we bypass pagecache... 49060623543bSJan Kara */ 49070390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4908f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 49090623543bSJan Kara /* 49100623543bSJan Kara * We don't need to lock updates but journal_flush() could 49110623543bSJan Kara * otherwise be livelocked... 49120623543bSJan Kara */ 49130623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 49147ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 49150623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4916f00c9e44SJan Kara if (err) 49177ffe1ea8SHidehiro Kawai return err; 49187ffe1ea8SHidehiro Kawai } 49190623543bSJan Kara 4920f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4921ac27a0ecSDave Kleikamp } 4922ac27a0ecSDave Kleikamp 49237c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 49247c319d32SAditya Kali unsigned int flags) 49257c319d32SAditya Kali { 49267c319d32SAditya Kali int err; 49277c319d32SAditya Kali struct inode *qf_inode; 49287c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 49297c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 49307c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 49317c319d32SAditya Kali }; 49327c319d32SAditya Kali 49337c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 49347c319d32SAditya Kali 49357c319d32SAditya Kali if (!qf_inums[type]) 49367c319d32SAditya Kali return -EPERM; 49377c319d32SAditya Kali 49387c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 49397c319d32SAditya Kali if (IS_ERR(qf_inode)) { 49407c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 49417c319d32SAditya Kali return PTR_ERR(qf_inode); 49427c319d32SAditya Kali } 49437c319d32SAditya Kali 49447c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 49457c319d32SAditya Kali iput(qf_inode); 49467c319d32SAditya Kali 49477c319d32SAditya Kali return err; 49487c319d32SAditya Kali } 49497c319d32SAditya Kali 49507c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 49517c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 49527c319d32SAditya Kali { 49537c319d32SAditya Kali int type, err = 0; 49547c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 49557c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 49567c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 49577c319d32SAditya Kali }; 49587c319d32SAditya Kali 49597c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 49607c319d32SAditya Kali for (type = 0; type < MAXQUOTAS; type++) { 49617c319d32SAditya Kali if (qf_inums[type]) { 49627c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 49637c319d32SAditya Kali DQUOT_USAGE_ENABLED); 49647c319d32SAditya Kali if (err) { 49657c319d32SAditya Kali ext4_warning(sb, 496672ba7450STheodore Ts'o "Failed to enable quota tracking " 496772ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 496872ba7450STheodore Ts'o "e2fsck to fix.", type, err); 49697c319d32SAditya Kali return err; 49707c319d32SAditya Kali } 49717c319d32SAditya Kali } 49727c319d32SAditya Kali } 49737c319d32SAditya Kali return 0; 49747c319d32SAditya Kali } 49757c319d32SAditya Kali 49767c319d32SAditya Kali /* 49777c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 49787c319d32SAditya Kali */ 49797c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 49807c319d32SAditya Kali int format_id) 49817c319d32SAditya Kali { 49827c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 49837c319d32SAditya Kali return -EINVAL; 49847c319d32SAditya Kali 49857c319d32SAditya Kali /* 49867c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 49877c319d32SAditya Kali */ 49887c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 49897c319d32SAditya Kali } 49907c319d32SAditya Kali 4991ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4992ca0e05e4SDmitry Monakhov { 499321f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 499421f97697SJan Kara handle_t *handle; 499521f97697SJan Kara 499687009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 499787009d86SDmitry Monakhov * Caller already holds s_umount sem */ 499887009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 4999ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5000ca0e05e4SDmitry Monakhov 50010b268590SAmir Goldstein if (!inode) 50020b268590SAmir Goldstein goto out; 50030b268590SAmir Goldstein 500421f97697SJan Kara /* Update modification times of quota files when userspace can 500521f97697SJan Kara * start looking at them */ 50069924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 500721f97697SJan Kara if (IS_ERR(handle)) 500821f97697SJan Kara goto out; 500921f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 501021f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 501121f97697SJan Kara ext4_journal_stop(handle); 501221f97697SJan Kara 501321f97697SJan Kara out: 5014ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5015ca0e05e4SDmitry Monakhov } 5016ca0e05e4SDmitry Monakhov 50177c319d32SAditya Kali /* 50187c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 50197c319d32SAditya Kali */ 50207c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 50217c319d32SAditya Kali { 50227c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 50237c319d32SAditya Kali return -EINVAL; 50247c319d32SAditya Kali 50257c319d32SAditya Kali /* Disable only the limits. */ 50267c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 50277c319d32SAditya Kali } 50287c319d32SAditya Kali 5029ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5030ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5031ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5032ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5033617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5034ac27a0ecSDave Kleikamp size_t len, loff_t off) 5035ac27a0ecSDave Kleikamp { 5036ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5037725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5038ac27a0ecSDave Kleikamp int err = 0; 5039ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5040ac27a0ecSDave Kleikamp int tocopy; 5041ac27a0ecSDave Kleikamp size_t toread; 5042ac27a0ecSDave Kleikamp struct buffer_head *bh; 5043ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5044ac27a0ecSDave Kleikamp 5045ac27a0ecSDave Kleikamp if (off > i_size) 5046ac27a0ecSDave Kleikamp return 0; 5047ac27a0ecSDave Kleikamp if (off+len > i_size) 5048ac27a0ecSDave Kleikamp len = i_size-off; 5049ac27a0ecSDave Kleikamp toread = len; 5050ac27a0ecSDave Kleikamp while (toread > 0) { 5051ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5052ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 5053617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 5054ac27a0ecSDave Kleikamp if (err) 5055ac27a0ecSDave Kleikamp return err; 5056ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5057ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5058ac27a0ecSDave Kleikamp else 5059ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5060ac27a0ecSDave Kleikamp brelse(bh); 5061ac27a0ecSDave Kleikamp offset = 0; 5062ac27a0ecSDave Kleikamp toread -= tocopy; 5063ac27a0ecSDave Kleikamp data += tocopy; 5064ac27a0ecSDave Kleikamp blk++; 5065ac27a0ecSDave Kleikamp } 5066ac27a0ecSDave Kleikamp return len; 5067ac27a0ecSDave Kleikamp } 5068ac27a0ecSDave Kleikamp 5069ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5070ac27a0ecSDave Kleikamp * enough credits) */ 5071617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5072ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5073ac27a0ecSDave Kleikamp { 5074ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5075725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5076ac27a0ecSDave Kleikamp int err = 0; 5077ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5078ac27a0ecSDave Kleikamp struct buffer_head *bh; 5079ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5080ac27a0ecSDave Kleikamp 50810390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5082b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5083b31e1552SEric Sandeen " cancelled because transaction is not started", 50849c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 50859c3013e9SJan Kara return -EIO; 50869c3013e9SJan Kara } 508767eeb568SDmitry Monakhov /* 508867eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 508967eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 509067eeb568SDmitry Monakhov */ 509167eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 509267eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 509367eeb568SDmitry Monakhov " cancelled because not block aligned", 509467eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 509567eeb568SDmitry Monakhov return -EIO; 509667eeb568SDmitry Monakhov } 509767eeb568SDmitry Monakhov 5098617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 5099ac27a0ecSDave Kleikamp if (!bh) 5100ac27a0ecSDave Kleikamp goto out; 5101617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5102ac27a0ecSDave Kleikamp if (err) { 5103ac27a0ecSDave Kleikamp brelse(bh); 5104ac27a0ecSDave Kleikamp goto out; 5105ac27a0ecSDave Kleikamp } 5106ac27a0ecSDave Kleikamp lock_buffer(bh); 510767eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5108ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5109ac27a0ecSDave Kleikamp unlock_buffer(bh); 51100390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5111ac27a0ecSDave Kleikamp brelse(bh); 5112ac27a0ecSDave Kleikamp out: 51130b7f7cefSJan Kara if (err) 5114ac27a0ecSDave Kleikamp return err; 511567eeb568SDmitry Monakhov if (inode->i_size < off + len) { 511667eeb568SDmitry Monakhov i_size_write(inode, off + len); 5117617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5118617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 511921f97697SJan Kara } 512067eeb568SDmitry Monakhov return len; 5121ac27a0ecSDave Kleikamp } 5122ac27a0ecSDave Kleikamp 5123ac27a0ecSDave Kleikamp #endif 5124ac27a0ecSDave Kleikamp 5125152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5126152a0836SAl Viro const char *dev_name, void *data) 5127ac27a0ecSDave Kleikamp { 5128152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5129ac27a0ecSDave Kleikamp } 5130ac27a0ecSDave Kleikamp 513137f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 513224b58424STheodore Ts'o static inline void register_as_ext2(void) 513324b58424STheodore Ts'o { 513424b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 513524b58424STheodore Ts'o if (err) 513624b58424STheodore Ts'o printk(KERN_WARNING 513724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 513824b58424STheodore Ts'o } 513924b58424STheodore Ts'o 514024b58424STheodore Ts'o static inline void unregister_as_ext2(void) 514124b58424STheodore Ts'o { 514224b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 514324b58424STheodore Ts'o } 51442035e776STheodore Ts'o 51452035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 51462035e776STheodore Ts'o { 51472035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 51482035e776STheodore Ts'o return 0; 51492035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 51502035e776STheodore Ts'o return 1; 51512035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 51522035e776STheodore Ts'o return 0; 51532035e776STheodore Ts'o return 1; 51542035e776STheodore Ts'o } 515551b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 515624b58424STheodore Ts'o #else 515724b58424STheodore Ts'o static inline void register_as_ext2(void) { } 515824b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 51592035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 516024b58424STheodore Ts'o #endif 516124b58424STheodore Ts'o 516237f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 516324b58424STheodore Ts'o static inline void register_as_ext3(void) 516424b58424STheodore Ts'o { 516524b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 516624b58424STheodore Ts'o if (err) 516724b58424STheodore Ts'o printk(KERN_WARNING 516824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 516924b58424STheodore Ts'o } 517024b58424STheodore Ts'o 517124b58424STheodore Ts'o static inline void unregister_as_ext3(void) 517224b58424STheodore Ts'o { 517324b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 517424b58424STheodore Ts'o } 51752035e776STheodore Ts'o 51762035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 51772035e776STheodore Ts'o { 51782035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 51792035e776STheodore Ts'o return 0; 51802035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 51812035e776STheodore Ts'o return 0; 51822035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 51832035e776STheodore Ts'o return 1; 51842035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 51852035e776STheodore Ts'o return 0; 51862035e776STheodore Ts'o return 1; 51872035e776STheodore Ts'o } 518851b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 518924b58424STheodore Ts'o #else 519024b58424STheodore Ts'o static inline void register_as_ext3(void) { } 519124b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 51922035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 519324b58424STheodore Ts'o #endif 519424b58424STheodore Ts'o 519503010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5196ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 519703010a33STheodore Ts'o .name = "ext4", 5198152a0836SAl Viro .mount = ext4_mount, 5199ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5200ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5201ac27a0ecSDave Kleikamp }; 5202ac27a0ecSDave Kleikamp 52038f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5204857ac889SLukas Czerner { 5205857ac889SLukas Czerner struct ext4_features *ef; 5206857ac889SLukas Czerner int ret = -ENOMEM; 5207857ac889SLukas Czerner 5208857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5209857ac889SLukas Czerner if (!ef) 5210857ac889SLukas Czerner goto out; 5211857ac889SLukas Czerner 5212857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5213857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5214857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5215857ac889SLukas Czerner "features"); 5216857ac889SLukas Czerner if (ret) { 5217857ac889SLukas Czerner kfree(ef); 5218857ac889SLukas Czerner goto out; 5219857ac889SLukas Czerner } 5220857ac889SLukas Czerner 5221857ac889SLukas Czerner ext4_feat = ef; 5222857ac889SLukas Czerner ret = 0; 5223857ac889SLukas Czerner out: 5224857ac889SLukas Czerner return ret; 5225857ac889SLukas Czerner } 5226857ac889SLukas Czerner 52278f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 52288f021222SLukas Czerner { 52298f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 52308f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 52318f021222SLukas Czerner kfree(ext4_feat); 52328f021222SLukas Czerner } 52338f021222SLukas Czerner 5234e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5235e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5236e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5237e9e3bcecSEric Sandeen 52385dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5239ac27a0ecSDave Kleikamp { 5240e9e3bcecSEric Sandeen int i, err; 5241c9de560dSAlex Tomas 524207c0c5d8SAl Viro ext4_li_info = NULL; 524307c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 524407c0c5d8SAl Viro 52459a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 524612e9b892SDmitry Monakhov ext4_check_flag_values(); 5247e9e3bcecSEric Sandeen 5248e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5249e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5250e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5251e9e3bcecSEric Sandeen } 5252e9e3bcecSEric Sandeen 525351865fdaSZheng Liu err = ext4_init_es(); 52546fd058f7STheodore Ts'o if (err) 52556fd058f7STheodore Ts'o return err; 525651865fdaSZheng Liu 525751865fdaSZheng Liu err = ext4_init_pageio(); 525851865fdaSZheng Liu if (err) 525951865fdaSZheng Liu goto out7; 526051865fdaSZheng Liu 52615dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5262bd2d0210STheodore Ts'o if (err) 5263d44651d0SFabrice Jouhaud goto out6; 52643197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 52650e376b1eSTheodore Ts'o if (!ext4_kset) { 52660e376b1eSTheodore Ts'o err = -ENOMEM; 5267dd68314cSTheodore Ts'o goto out5; 52680e376b1eSTheodore Ts'o } 5269d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5270857ac889SLukas Czerner 5271857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5272dd68314cSTheodore Ts'o if (err) 5273dd68314cSTheodore Ts'o goto out4; 5274857ac889SLukas Czerner 52755dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5276ac27a0ecSDave Kleikamp if (err) 52776fd058f7STheodore Ts'o goto out3; 5278c9de560dSAlex Tomas 52795dabfc78STheodore Ts'o err = ext4_init_xattr(); 5280c9de560dSAlex Tomas if (err) 5281c9de560dSAlex Tomas goto out2; 5282ac27a0ecSDave Kleikamp err = init_inodecache(); 5283ac27a0ecSDave Kleikamp if (err) 5284ac27a0ecSDave Kleikamp goto out1; 528524b58424STheodore Ts'o register_as_ext3(); 52862035e776STheodore Ts'o register_as_ext2(); 528703010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5288ac27a0ecSDave Kleikamp if (err) 5289ac27a0ecSDave Kleikamp goto out; 5290bfff6873SLukas Czerner 5291ac27a0ecSDave Kleikamp return 0; 5292ac27a0ecSDave Kleikamp out: 529324b58424STheodore Ts'o unregister_as_ext2(); 529424b58424STheodore Ts'o unregister_as_ext3(); 5295ac27a0ecSDave Kleikamp destroy_inodecache(); 5296ac27a0ecSDave Kleikamp out1: 52975dabfc78STheodore Ts'o ext4_exit_xattr(); 5298c9de560dSAlex Tomas out2: 52995dabfc78STheodore Ts'o ext4_exit_mballoc(); 53006fd058f7STheodore Ts'o out3: 53018f021222SLukas Czerner ext4_exit_feat_adverts(); 53026fd058f7STheodore Ts'o out4: 5303d44651d0SFabrice Jouhaud if (ext4_proc_root) 5304dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5305dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5306d44651d0SFabrice Jouhaud out5: 5307dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5308d44651d0SFabrice Jouhaud out6: 53095dabfc78STheodore Ts'o ext4_exit_pageio(); 531051865fdaSZheng Liu out7: 531151865fdaSZheng Liu ext4_exit_es(); 531251865fdaSZheng Liu 5313ac27a0ecSDave Kleikamp return err; 5314ac27a0ecSDave Kleikamp } 5315ac27a0ecSDave Kleikamp 53165dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5317ac27a0ecSDave Kleikamp { 5318bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 531924b58424STheodore Ts'o unregister_as_ext2(); 532024b58424STheodore Ts'o unregister_as_ext3(); 532103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5322ac27a0ecSDave Kleikamp destroy_inodecache(); 53235dabfc78STheodore Ts'o ext4_exit_xattr(); 53245dabfc78STheodore Ts'o ext4_exit_mballoc(); 53258f021222SLukas Czerner ext4_exit_feat_adverts(); 53269f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 53273197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 53285dabfc78STheodore Ts'o ext4_exit_system_zone(); 53295dabfc78STheodore Ts'o ext4_exit_pageio(); 5330ac27a0ecSDave Kleikamp } 5331ac27a0ecSDave Kleikamp 5332ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 533383982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5334ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 53355dabfc78STheodore Ts'o module_init(ext4_init_fs) 53365dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5337