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 const char *ext4_decode_error(struct super_block *sb, int errno, 73ac27a0ecSDave Kleikamp char nbuf[16]); 74617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 75617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 76c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 77c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 78152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 79152a0836SAl Viro const char *dev_name, void *data); 802035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 812035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 82d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 83bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 84bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 858f1f7453SEric Sandeen static void ext4_clear_request_list(void); 86ac27a0ecSDave Kleikamp 872035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 882035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 892035e776STheodore Ts'o .owner = THIS_MODULE, 902035e776STheodore Ts'o .name = "ext2", 912035e776STheodore Ts'o .mount = ext4_mount, 922035e776STheodore Ts'o .kill_sb = kill_block_super, 932035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 942035e776STheodore Ts'o }; 952035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 962035e776STheodore Ts'o #else 972035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 982035e776STheodore Ts'o #endif 992035e776STheodore Ts'o 1002035e776STheodore Ts'o 101ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 102ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 103ba69f9abSJan Kara .owner = THIS_MODULE, 104ba69f9abSJan Kara .name = "ext3", 105152a0836SAl Viro .mount = ext4_mount, 106ba69f9abSJan Kara .kill_sb = kill_block_super, 107ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 108ba69f9abSJan Kara }; 109ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 110ba69f9abSJan Kara #else 111ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 112ba69f9abSJan Kara #endif 113bd81d8eeSLaurent Vivier 114d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 115d25425f8SDarrick J. Wong struct ext4_super_block *es) 116d25425f8SDarrick J. Wong { 117d25425f8SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 118d25425f8SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 119d25425f8SDarrick J. Wong return 1; 120d25425f8SDarrick J. Wong 121d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 122d25425f8SDarrick J. Wong } 123d25425f8SDarrick J. Wong 124a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 125a9c47317SDarrick J. Wong struct ext4_super_block *es) 126a9c47317SDarrick J. Wong { 127a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 128a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 129a9c47317SDarrick J. Wong __u32 csum; 130a9c47317SDarrick J. Wong 131a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 132a9c47317SDarrick J. Wong 133a9c47317SDarrick J. Wong return cpu_to_le32(csum); 134a9c47317SDarrick J. Wong } 135a9c47317SDarrick J. Wong 136a9c47317SDarrick J. Wong int ext4_superblock_csum_verify(struct super_block *sb, 137a9c47317SDarrick J. Wong struct ext4_super_block *es) 138a9c47317SDarrick J. Wong { 139a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 140a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 141a9c47317SDarrick J. Wong return 1; 142a9c47317SDarrick J. Wong 143a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 144a9c47317SDarrick J. Wong } 145a9c47317SDarrick J. Wong 14606db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 147a9c47317SDarrick J. Wong { 14806db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 14906db49e6STheodore Ts'o 150a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 151a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 152a9c47317SDarrick J. Wong return; 153a9c47317SDarrick J. Wong 154a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 155a9c47317SDarrick J. Wong } 156a9c47317SDarrick J. Wong 1579933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1589933fc0aSTheodore Ts'o { 1599933fc0aSTheodore Ts'o void *ret; 1609933fc0aSTheodore Ts'o 1619933fc0aSTheodore Ts'o ret = kmalloc(size, flags); 1629933fc0aSTheodore Ts'o if (!ret) 1639933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1649933fc0aSTheodore Ts'o return ret; 1659933fc0aSTheodore Ts'o } 1669933fc0aSTheodore Ts'o 1679933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1689933fc0aSTheodore Ts'o { 1699933fc0aSTheodore Ts'o void *ret; 1709933fc0aSTheodore Ts'o 171db9481c0SMathias Krause ret = kzalloc(size, flags); 1729933fc0aSTheodore Ts'o if (!ret) 1739933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1749933fc0aSTheodore Ts'o return ret; 1759933fc0aSTheodore Ts'o } 1769933fc0aSTheodore Ts'o 1779933fc0aSTheodore Ts'o void ext4_kvfree(void *ptr) 1789933fc0aSTheodore Ts'o { 1799933fc0aSTheodore Ts'o if (is_vmalloc_addr(ptr)) 1809933fc0aSTheodore Ts'o vfree(ptr); 1819933fc0aSTheodore Ts'o else 1829933fc0aSTheodore Ts'o kfree(ptr); 1839933fc0aSTheodore Ts'o 1849933fc0aSTheodore Ts'o } 1859933fc0aSTheodore Ts'o 1868fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1878fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 188bd81d8eeSLaurent Vivier { 1893a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1908fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1918fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 192bd81d8eeSLaurent Vivier } 193bd81d8eeSLaurent Vivier 1948fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1958fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 196bd81d8eeSLaurent Vivier { 1975272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1988fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1998fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 200bd81d8eeSLaurent Vivier } 201bd81d8eeSLaurent Vivier 2028fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2038fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 204bd81d8eeSLaurent Vivier { 2055272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2068fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2078fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 208bd81d8eeSLaurent Vivier } 209bd81d8eeSLaurent Vivier 210021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 211560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 212560671a0SAneesh Kumar K.V { 213560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 214560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 215560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 216560671a0SAneesh Kumar K.V } 217560671a0SAneesh Kumar K.V 218560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 219560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 220560671a0SAneesh Kumar K.V { 221560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 222560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 223560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 224560671a0SAneesh Kumar K.V } 225560671a0SAneesh Kumar K.V 226560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 227560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 228560671a0SAneesh Kumar K.V { 229560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 230560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 231560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 232560671a0SAneesh Kumar K.V } 233560671a0SAneesh Kumar K.V 234560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 235560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 236560671a0SAneesh Kumar K.V { 237560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 238560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 239560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 240560671a0SAneesh Kumar K.V } 241560671a0SAneesh Kumar K.V 2428fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2438fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 244bd81d8eeSLaurent Vivier { 2453a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2468fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2478fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 248bd81d8eeSLaurent Vivier } 249bd81d8eeSLaurent Vivier 2508fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2518fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 252bd81d8eeSLaurent Vivier { 2535272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2548fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2558fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 256bd81d8eeSLaurent Vivier } 257bd81d8eeSLaurent Vivier 2588fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2598fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 260bd81d8eeSLaurent Vivier { 2615272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2628fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2638fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 264bd81d8eeSLaurent Vivier } 265bd81d8eeSLaurent Vivier 266021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 267560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 268560671a0SAneesh Kumar K.V { 269560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 270560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 271560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 272560671a0SAneesh Kumar K.V } 273560671a0SAneesh Kumar K.V 274560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 275560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 276560671a0SAneesh Kumar K.V { 277560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 278560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 279560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 280560671a0SAneesh Kumar K.V } 281560671a0SAneesh Kumar K.V 282560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 283560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 284560671a0SAneesh Kumar K.V { 285560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 286560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 287560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 288560671a0SAneesh Kumar K.V } 289560671a0SAneesh Kumar K.V 290560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 291560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 292560671a0SAneesh Kumar K.V { 293560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 294560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 295560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 296560671a0SAneesh Kumar K.V } 297560671a0SAneesh Kumar K.V 298d3d1faf6SCurt Wohlgemuth 299d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 300d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 301d3d1faf6SCurt Wohlgemuth { 302d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 303d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 304d3d1faf6SCurt Wohlgemuth 305d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 306d3d1faf6SCurt Wohlgemuth 307d3d1faf6SCurt Wohlgemuth ref_cnt++; 308d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 309d3d1faf6SCurt Wohlgemuth 310d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 311d3d1faf6SCurt Wohlgemuth return handle; 312d3d1faf6SCurt Wohlgemuth } 313d3d1faf6SCurt Wohlgemuth 314d3d1faf6SCurt Wohlgemuth 315d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 316d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 317d3d1faf6SCurt Wohlgemuth { 318d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 319d3d1faf6SCurt Wohlgemuth 320d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 321d3d1faf6SCurt Wohlgemuth 322d3d1faf6SCurt Wohlgemuth ref_cnt--; 323d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 324d3d1faf6SCurt Wohlgemuth 325d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 326d3d1faf6SCurt Wohlgemuth } 327d3d1faf6SCurt Wohlgemuth 328ac27a0ecSDave Kleikamp /* 329dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 330ac27a0ecSDave Kleikamp */ 331617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 332ac27a0ecSDave Kleikamp { 333ac27a0ecSDave Kleikamp journal_t *journal; 334ac27a0ecSDave Kleikamp 33512706394STheodore Ts'o trace_ext4_journal_start(sb, nblocks, _RET_IP_); 336ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 337ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 338ac27a0ecSDave Kleikamp 3398e8ad8a5SJan Kara WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE); 340617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 341be4f27d3SYongqiang Yang if (!journal) 342be4f27d3SYongqiang Yang return ext4_get_nojournal(); 343be4f27d3SYongqiang Yang /* 344be4f27d3SYongqiang Yang * Special case here: if the journal has aborted behind our 345be4f27d3SYongqiang Yang * backs (eg. EIO in the commit thread), then we still need to 346be4f27d3SYongqiang Yang * take the FS itself readonly cleanly. 347be4f27d3SYongqiang Yang */ 348ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 349c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 350ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 351ac27a0ecSDave Kleikamp } 352dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 353ac27a0ecSDave Kleikamp } 354ac27a0ecSDave Kleikamp 355c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 356ac27a0ecSDave Kleikamp { 357ac27a0ecSDave Kleikamp struct super_block *sb; 358ac27a0ecSDave Kleikamp int err; 359ac27a0ecSDave Kleikamp int rc; 360ac27a0ecSDave Kleikamp 3610390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 362d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 3630390131bSFrank Mayhar return 0; 3640390131bSFrank Mayhar } 365ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 366ac27a0ecSDave Kleikamp err = handle->h_err; 367dab291afSMingming Cao rc = jbd2_journal_stop(handle); 368ac27a0ecSDave Kleikamp 369ac27a0ecSDave Kleikamp if (!err) 370ac27a0ecSDave Kleikamp err = rc; 371ac27a0ecSDave Kleikamp if (err) 372c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 373ac27a0ecSDave Kleikamp return err; 374ac27a0ecSDave Kleikamp } 375ac27a0ecSDave Kleikamp 37690c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 37790c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 37890c7201bSTheodore Ts'o handle_t *handle, int err) 379ac27a0ecSDave Kleikamp { 380ac27a0ecSDave Kleikamp char nbuf[16]; 381617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 382ac27a0ecSDave Kleikamp 3830390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 3840390131bSFrank Mayhar 385ac27a0ecSDave Kleikamp if (bh) 386ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 387ac27a0ecSDave Kleikamp 388ac27a0ecSDave Kleikamp if (!handle->h_err) 389ac27a0ecSDave Kleikamp handle->h_err = err; 390ac27a0ecSDave Kleikamp 391ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 392ac27a0ecSDave Kleikamp return; 393ac27a0ecSDave Kleikamp 39492b97816STheodore Ts'o printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n", 39590c7201bSTheodore Ts'o caller, line, errstr, err_fn); 396ac27a0ecSDave Kleikamp 397dab291afSMingming Cao jbd2_journal_abort_handle(handle); 398ac27a0ecSDave Kleikamp } 399ac27a0ecSDave Kleikamp 4001c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 4011c13d5c0STheodore Ts'o unsigned int line) 4021c13d5c0STheodore Ts'o { 4031c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4041c13d5c0STheodore Ts'o 4051c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4061c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4071c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 4081c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 4091c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 4101c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 4111c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 4121c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 4131c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 4141c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 4151c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 4161c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 4171c13d5c0STheodore Ts'o } 41866e61a9eSTheodore Ts'o /* 41966e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 42066e61a9eSTheodore Ts'o * started already 42166e61a9eSTheodore Ts'o */ 42266e61a9eSTheodore Ts'o if (!es->s_error_count) 42366e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 424ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 4251c13d5c0STheodore Ts'o } 4261c13d5c0STheodore Ts'o 4271c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 4281c13d5c0STheodore Ts'o unsigned int line) 4291c13d5c0STheodore Ts'o { 4301c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 4311c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 4321c13d5c0STheodore Ts'o } 4331c13d5c0STheodore Ts'o 4347c2e7087STheodore Ts'o /* 4357c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 4367c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 4377c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 4387c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 4397c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 4407c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 4417c2e7087STheodore Ts'o */ 4427c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 4437c2e7087STheodore Ts'o { 4447c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 4457c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 4467c2e7087STheodore Ts'o 4477c2e7087STheodore Ts'o return bdi->dev == NULL; 4487c2e7087STheodore Ts'o } 4497c2e7087STheodore Ts'o 45018aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 45118aadd47SBobi Jam { 45218aadd47SBobi Jam struct super_block *sb = journal->j_private; 45318aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 45418aadd47SBobi Jam int error = is_journal_aborted(journal); 45518aadd47SBobi Jam struct ext4_journal_cb_entry *jce, *tmp; 45618aadd47SBobi Jam 45718aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 45818aadd47SBobi Jam list_for_each_entry_safe(jce, tmp, &txn->t_private_list, jce_list) { 45918aadd47SBobi Jam list_del_init(&jce->jce_list); 46018aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46118aadd47SBobi Jam jce->jce_func(sb, jce, error); 46218aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 46318aadd47SBobi Jam } 46418aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46518aadd47SBobi Jam } 4661c13d5c0STheodore Ts'o 467ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 468ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 469ac27a0ecSDave Kleikamp * 470ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 471617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 472ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 473ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 474ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 475ac27a0ecSDave Kleikamp * write out the superblock safely. 476ac27a0ecSDave Kleikamp * 477dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 478d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 479ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 480ac27a0ecSDave Kleikamp */ 481ac27a0ecSDave Kleikamp 482617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 483ac27a0ecSDave Kleikamp { 484ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 485ac27a0ecSDave Kleikamp return; 486ac27a0ecSDave Kleikamp 487ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 488617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 489ac27a0ecSDave Kleikamp 4904ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 491ac27a0ecSDave Kleikamp if (journal) 492dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 493ac27a0ecSDave Kleikamp } 494ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 495b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 496ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 497ac27a0ecSDave Kleikamp } 498ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 499617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 500ac27a0ecSDave Kleikamp sb->s_id); 501ac27a0ecSDave Kleikamp } 502ac27a0ecSDave Kleikamp 50312062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 504c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 505ac27a0ecSDave Kleikamp { 5060ff2ea7dSJoe Perches struct va_format vaf; 507ac27a0ecSDave Kleikamp va_list args; 508ac27a0ecSDave Kleikamp 509ac27a0ecSDave Kleikamp va_start(args, fmt); 5100ff2ea7dSJoe Perches vaf.fmt = fmt; 5110ff2ea7dSJoe Perches vaf.va = &args; 5120ff2ea7dSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 5130ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 514ac27a0ecSDave Kleikamp va_end(args); 515f3fc0210STheodore Ts'o save_error_info(sb, function, line); 516ac27a0ecSDave Kleikamp 517617ba13bSMingming Cao ext4_handle_error(sb); 518ac27a0ecSDave Kleikamp } 519ac27a0ecSDave Kleikamp 520c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 521c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 522273df556SFrank Mayhar const char *fmt, ...) 523273df556SFrank Mayhar { 524273df556SFrank Mayhar va_list args; 525f7c21177STheodore Ts'o struct va_format vaf; 5261c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 527273df556SFrank Mayhar 5281c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5291c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 5301c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 531273df556SFrank Mayhar va_start(args, fmt); 532f7c21177STheodore Ts'o vaf.fmt = fmt; 533f7c21177STheodore Ts'o vaf.va = &args; 534c398eda0STheodore Ts'o if (block) 535d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 536d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 537d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 538d9ee81daSJoe Perches block, current->comm, &vaf); 539d9ee81daSJoe Perches else 540d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 541d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 542d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 543d9ee81daSJoe Perches current->comm, &vaf); 544273df556SFrank Mayhar va_end(args); 545273df556SFrank Mayhar 546273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 547273df556SFrank Mayhar } 548273df556SFrank Mayhar 549c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 550f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 551f7c21177STheodore Ts'o const char *fmt, ...) 552273df556SFrank Mayhar { 553273df556SFrank Mayhar va_list args; 554f7c21177STheodore Ts'o struct va_format vaf; 5551c13d5c0STheodore Ts'o struct ext4_super_block *es; 556273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 557273df556SFrank Mayhar char pathname[80], *path; 558273df556SFrank Mayhar 5591c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5601c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5611c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 562273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 563f9a62d09SDan Carpenter if (IS_ERR(path)) 564273df556SFrank Mayhar path = "(unknown)"; 565f7c21177STheodore Ts'o va_start(args, fmt); 566f7c21177STheodore Ts'o vaf.fmt = fmt; 567f7c21177STheodore Ts'o vaf.va = &args; 568d9ee81daSJoe Perches if (block) 569d9ee81daSJoe Perches printk(KERN_CRIT 570d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 571d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 572d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 573d9ee81daSJoe Perches block, current->comm, path, &vaf); 574d9ee81daSJoe Perches else 575d9ee81daSJoe Perches printk(KERN_CRIT 576d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 577d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 578d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 579d9ee81daSJoe Perches current->comm, path, &vaf); 580273df556SFrank Mayhar va_end(args); 581273df556SFrank Mayhar 582273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 583273df556SFrank Mayhar } 584273df556SFrank Mayhar 585617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 586ac27a0ecSDave Kleikamp char nbuf[16]) 587ac27a0ecSDave Kleikamp { 588ac27a0ecSDave Kleikamp char *errstr = NULL; 589ac27a0ecSDave Kleikamp 590ac27a0ecSDave Kleikamp switch (errno) { 591ac27a0ecSDave Kleikamp case -EIO: 592ac27a0ecSDave Kleikamp errstr = "IO failure"; 593ac27a0ecSDave Kleikamp break; 594ac27a0ecSDave Kleikamp case -ENOMEM: 595ac27a0ecSDave Kleikamp errstr = "Out of memory"; 596ac27a0ecSDave Kleikamp break; 597ac27a0ecSDave Kleikamp case -EROFS: 59878f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 59978f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 600ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 601ac27a0ecSDave Kleikamp else 602ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 603ac27a0ecSDave Kleikamp break; 604ac27a0ecSDave Kleikamp default: 605ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 606ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 607ac27a0ecSDave Kleikamp * NULL. */ 608ac27a0ecSDave Kleikamp if (nbuf) { 609ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 610ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 611ac27a0ecSDave Kleikamp errstr = nbuf; 612ac27a0ecSDave Kleikamp } 613ac27a0ecSDave Kleikamp break; 614ac27a0ecSDave Kleikamp } 615ac27a0ecSDave Kleikamp 616ac27a0ecSDave Kleikamp return errstr; 617ac27a0ecSDave Kleikamp } 618ac27a0ecSDave Kleikamp 619617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 620ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 621ac27a0ecSDave Kleikamp 622c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 623c398eda0STheodore Ts'o unsigned int line, int errno) 624ac27a0ecSDave Kleikamp { 625ac27a0ecSDave Kleikamp char nbuf[16]; 626ac27a0ecSDave Kleikamp const char *errstr; 627ac27a0ecSDave Kleikamp 628ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 629ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 630ac27a0ecSDave Kleikamp * an error. */ 631ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 632ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 633ac27a0ecSDave Kleikamp return; 634ac27a0ecSDave Kleikamp 635617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 636c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 637c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 6381c13d5c0STheodore Ts'o save_error_info(sb, function, line); 639ac27a0ecSDave Kleikamp 640617ba13bSMingming Cao ext4_handle_error(sb); 641ac27a0ecSDave Kleikamp } 642ac27a0ecSDave Kleikamp 643ac27a0ecSDave Kleikamp /* 644617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 645ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 646ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 647ac27a0ecSDave Kleikamp * 648ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 649ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 650ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 651ac27a0ecSDave Kleikamp */ 652ac27a0ecSDave Kleikamp 653c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 654c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 655ac27a0ecSDave Kleikamp { 656ac27a0ecSDave Kleikamp va_list args; 657ac27a0ecSDave Kleikamp 6581c13d5c0STheodore Ts'o save_error_info(sb, function, line); 659ac27a0ecSDave Kleikamp va_start(args, fmt); 660c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 661c398eda0STheodore Ts'o function, line); 662ac27a0ecSDave Kleikamp vprintk(fmt, args); 663ac27a0ecSDave Kleikamp printk("\n"); 664ac27a0ecSDave Kleikamp va_end(args); 665ac27a0ecSDave Kleikamp 6661c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 667b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 668ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 6694ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 670ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 671dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6721c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6731c13d5c0STheodore Ts'o } 6741c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 6751c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 676ac27a0ecSDave Kleikamp } 677ac27a0ecSDave Kleikamp 6780ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 679b31e1552SEric Sandeen { 6800ff2ea7dSJoe Perches struct va_format vaf; 681b31e1552SEric Sandeen va_list args; 682b31e1552SEric Sandeen 683b31e1552SEric Sandeen va_start(args, fmt); 6840ff2ea7dSJoe Perches vaf.fmt = fmt; 6850ff2ea7dSJoe Perches vaf.va = &args; 6860ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 687b31e1552SEric Sandeen va_end(args); 688b31e1552SEric Sandeen } 689b31e1552SEric Sandeen 69012062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 691c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 692ac27a0ecSDave Kleikamp { 6930ff2ea7dSJoe Perches struct va_format vaf; 694ac27a0ecSDave Kleikamp va_list args; 695ac27a0ecSDave Kleikamp 696ac27a0ecSDave Kleikamp va_start(args, fmt); 6970ff2ea7dSJoe Perches vaf.fmt = fmt; 6980ff2ea7dSJoe Perches vaf.va = &args; 6990ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 7000ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 701ac27a0ecSDave Kleikamp va_end(args); 702ac27a0ecSDave Kleikamp } 703ac27a0ecSDave Kleikamp 704e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 705e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 706e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 707e29136f8STheodore Ts'o const char *fmt, ...) 7085d1b1b3fSAneesh Kumar K.V __releases(bitlock) 7095d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 7105d1b1b3fSAneesh Kumar K.V { 7110ff2ea7dSJoe Perches struct va_format vaf; 7125d1b1b3fSAneesh Kumar K.V va_list args; 7135d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 7145d1b1b3fSAneesh Kumar K.V 7151c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 7161c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 7171c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 7180ff2ea7dSJoe Perches 7195d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7200ff2ea7dSJoe Perches 7210ff2ea7dSJoe Perches vaf.fmt = fmt; 7220ff2ea7dSJoe Perches vaf.va = &args; 72321149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 724e29136f8STheodore Ts'o sb->s_id, function, line, grp); 725e29136f8STheodore Ts'o if (ino) 7260ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 727e29136f8STheodore Ts'o if (block) 7280ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 7290ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7305d1b1b3fSAneesh Kumar K.V va_end(args); 7315d1b1b3fSAneesh Kumar K.V 7325d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 733e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7345d1b1b3fSAneesh Kumar K.V return; 7355d1b1b3fSAneesh Kumar K.V } 7361c13d5c0STheodore Ts'o 7375d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 7385d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7395d1b1b3fSAneesh Kumar K.V /* 7405d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7415d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7425d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7435d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7445d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 74525985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7465d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7475d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7485d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7495d1b1b3fSAneesh Kumar K.V */ 7505d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7515d1b1b3fSAneesh Kumar K.V return; 7525d1b1b3fSAneesh Kumar K.V } 7535d1b1b3fSAneesh Kumar K.V 754617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 755ac27a0ecSDave Kleikamp { 756617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 757ac27a0ecSDave Kleikamp 758617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 759ac27a0ecSDave Kleikamp return; 760ac27a0ecSDave Kleikamp 76112062dddSEric Sandeen ext4_warning(sb, 762ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 763ac27a0ecSDave Kleikamp "running e2fsck is recommended", 764617ba13bSMingming Cao EXT4_DYNAMIC_REV); 765ac27a0ecSDave Kleikamp 766617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 767617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 768617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 769ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 770ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 771ac27a0ecSDave Kleikamp 772ac27a0ecSDave Kleikamp /* 773ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 774ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 775ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 776ac27a0ecSDave Kleikamp */ 777ac27a0ecSDave Kleikamp } 778ac27a0ecSDave Kleikamp 779ac27a0ecSDave Kleikamp /* 780ac27a0ecSDave Kleikamp * Open the external journal device 781ac27a0ecSDave Kleikamp */ 782b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 783ac27a0ecSDave Kleikamp { 784ac27a0ecSDave Kleikamp struct block_device *bdev; 785ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 786ac27a0ecSDave Kleikamp 787d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 788ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 789ac27a0ecSDave Kleikamp goto fail; 790ac27a0ecSDave Kleikamp return bdev; 791ac27a0ecSDave Kleikamp 792ac27a0ecSDave Kleikamp fail: 793b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 794ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 795ac27a0ecSDave Kleikamp return NULL; 796ac27a0ecSDave Kleikamp } 797ac27a0ecSDave Kleikamp 798ac27a0ecSDave Kleikamp /* 799ac27a0ecSDave Kleikamp * Release the journal device 800ac27a0ecSDave Kleikamp */ 801617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 802ac27a0ecSDave Kleikamp { 803e525fd89STejun Heo return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 804ac27a0ecSDave Kleikamp } 805ac27a0ecSDave Kleikamp 806617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 807ac27a0ecSDave Kleikamp { 808ac27a0ecSDave Kleikamp struct block_device *bdev; 809ac27a0ecSDave Kleikamp int ret = -ENODEV; 810ac27a0ecSDave Kleikamp 811ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 812ac27a0ecSDave Kleikamp if (bdev) { 813617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 814ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 815ac27a0ecSDave Kleikamp } 816ac27a0ecSDave Kleikamp return ret; 817ac27a0ecSDave Kleikamp } 818ac27a0ecSDave Kleikamp 819ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 820ac27a0ecSDave Kleikamp { 821617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 822ac27a0ecSDave Kleikamp } 823ac27a0ecSDave Kleikamp 824617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 825ac27a0ecSDave Kleikamp { 826ac27a0ecSDave Kleikamp struct list_head *l; 827ac27a0ecSDave Kleikamp 828b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 829ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 830ac27a0ecSDave Kleikamp 831ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 832ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 833ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 834ac27a0ecSDave Kleikamp printk(KERN_ERR " " 835ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 836ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 837ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 838ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 839ac27a0ecSDave Kleikamp } 840ac27a0ecSDave Kleikamp } 841ac27a0ecSDave Kleikamp 842617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 843ac27a0ecSDave Kleikamp { 844617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 845617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 846ef2cabf7SHidehiro Kawai int i, err; 847ac27a0ecSDave Kleikamp 848857ac889SLukas Czerner ext4_unregister_li_request(sb); 849e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 850e0ccfd95SChristoph Hellwig 8514c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 8524c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 8534c0425ffSMingming Cao 8540390131bSFrank Mayhar if (sbi->s_journal) { 855ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 85647b4a50bSJan Kara sbi->s_journal = NULL; 857ef2cabf7SHidehiro Kawai if (err < 0) 858c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8590390131bSFrank Mayhar } 860d4edac31SJosef Bacik 861a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 862d4edac31SJosef Bacik ext4_release_system_zone(sb); 863d4edac31SJosef Bacik ext4_mb_release(sb); 864d4edac31SJosef Bacik ext4_ext_release(sb); 865d4edac31SJosef Bacik ext4_xattr_put_super(sb); 866d4edac31SJosef Bacik 867ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 868617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 869ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 870ac27a0ecSDave Kleikamp } 87158c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 872a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 873a8e25a83SArtem Bityutskiy 874240799cdSTheodore Ts'o if (sbi->s_proc) { 87566acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 8769f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 877240799cdSTheodore Ts'o } 8783197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 879ac27a0ecSDave Kleikamp 880ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 881ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 882f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 8839933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 88457042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 885ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 886ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 88757042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 888ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 889ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 890ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 891ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 892ac27a0ecSDave Kleikamp #endif 893ac27a0ecSDave Kleikamp 894ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 895ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 896ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 897ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 898ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 899ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 900ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 901ac27a0ecSDave Kleikamp 902f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 903ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 904ac27a0ecSDave Kleikamp /* 905ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 906ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 907ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 908ac27a0ecSDave Kleikamp */ 909ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 910f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 911617ba13bSMingming Cao ext4_blkdev_remove(sbi); 912ac27a0ecSDave Kleikamp } 913c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 914c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 915ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 9163197ebdbSTheodore Ts'o /* 9173197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 9183197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9193197ebdbSTheodore Ts'o */ 9203197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9213197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9220441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9230441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 924705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 925ac27a0ecSDave Kleikamp kfree(sbi); 926ac27a0ecSDave Kleikamp } 927ac27a0ecSDave Kleikamp 928e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 929ac27a0ecSDave Kleikamp 930ac27a0ecSDave Kleikamp /* 931ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 932ac27a0ecSDave Kleikamp */ 933617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 934ac27a0ecSDave Kleikamp { 935617ba13bSMingming Cao struct ext4_inode_info *ei; 936ac27a0ecSDave Kleikamp 937e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 938ac27a0ecSDave Kleikamp if (!ei) 939ac27a0ecSDave Kleikamp return NULL; 9400b8e58a1SAndreas Dilger 941ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 942a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 943c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 944c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 9459a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 9469a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 947d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 948d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 949d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9509d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 9517e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 952d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 953a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 954a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 955a9e7f447SDmitry Monakhov #endif 9568aefcd55STheodore Ts'o ei->jinode = NULL; 957c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 958744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 959b436b9beSJan Kara ei->i_sync_tid = 0; 960b436b9beSJan Kara ei->i_datasync_tid = 0; 961f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 962e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 96384c17543SJan Kara INIT_WORK(&ei->i_unwritten_work, ext4_end_io_work); 9640b8e58a1SAndreas Dilger 965ac27a0ecSDave Kleikamp return &ei->vfs_inode; 966ac27a0ecSDave Kleikamp } 967ac27a0ecSDave Kleikamp 9687ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9697ff9c073STheodore Ts'o { 9707ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9717ff9c073STheodore Ts'o 9727ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9737ff9c073STheodore Ts'o return drop; 9747ff9c073STheodore Ts'o } 9757ff9c073STheodore Ts'o 976fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 977fa0d7e3dSNick Piggin { 978fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 979fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 980fa0d7e3dSNick Piggin } 981fa0d7e3dSNick Piggin 982617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 983ac27a0ecSDave Kleikamp { 9849f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 985b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 986b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 987b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9889f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9899f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9909f7dd93dSVasily Averin true); 9919f7dd93dSVasily Averin dump_stack(); 9929f7dd93dSVasily Averin } 993fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 994ac27a0ecSDave Kleikamp } 995ac27a0ecSDave Kleikamp 99651cc5068SAlexey Dobriyan static void init_once(void *foo) 997ac27a0ecSDave Kleikamp { 998617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 999ac27a0ecSDave Kleikamp 1000ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1001ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 10020e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1003ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1004ac27a0ecSDave Kleikamp } 1005ac27a0ecSDave Kleikamp 1006ac27a0ecSDave Kleikamp static int init_inodecache(void) 1007ac27a0ecSDave Kleikamp { 1008617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 1009617ba13bSMingming Cao sizeof(struct ext4_inode_info), 1010ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 1011ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 101220c2df83SPaul Mundt init_once); 1013617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1014ac27a0ecSDave Kleikamp return -ENOMEM; 1015ac27a0ecSDave Kleikamp return 0; 1016ac27a0ecSDave Kleikamp } 1017ac27a0ecSDave Kleikamp 1018ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1019ac27a0ecSDave Kleikamp { 10208c0a8537SKirill A. Shutemov /* 10218c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 10228c0a8537SKirill A. Shutemov * destroy cache. 10238c0a8537SKirill A. Shutemov */ 10248c0a8537SKirill A. Shutemov rcu_barrier(); 1025617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1026ac27a0ecSDave Kleikamp } 1027ac27a0ecSDave Kleikamp 10280930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1029ac27a0ecSDave Kleikamp { 10300930fcc1SAl Viro invalidate_inode_buffers(inode); 1031dbd5768fSJan Kara clear_inode(inode); 10329f754758SChristoph Hellwig dquot_drop(inode); 1033c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 103451865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 10358aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10368aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10378aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10388aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10398aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10408aefcd55STheodore Ts'o } 1041ac27a0ecSDave Kleikamp } 1042ac27a0ecSDave Kleikamp 10431b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10441b961ac0SChristoph Hellwig u64 ino, u32 generation) 1045ac27a0ecSDave Kleikamp { 1046ac27a0ecSDave Kleikamp struct inode *inode; 1047ac27a0ecSDave Kleikamp 1048617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1049ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1050617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1051ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1052ac27a0ecSDave Kleikamp 1053ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1054ac27a0ecSDave Kleikamp * 1055617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1056ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1057ac27a0ecSDave Kleikamp * 1058ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1059ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1060ac27a0ecSDave Kleikamp */ 10611d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10621d1fe1eeSDavid Howells if (IS_ERR(inode)) 10631d1fe1eeSDavid Howells return ERR_CAST(inode); 10641d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1065ac27a0ecSDave Kleikamp iput(inode); 1066ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1067ac27a0ecSDave Kleikamp } 10681b961ac0SChristoph Hellwig 10691b961ac0SChristoph Hellwig return inode; 1070ac27a0ecSDave Kleikamp } 10711b961ac0SChristoph Hellwig 10721b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10731b961ac0SChristoph Hellwig int fh_len, int fh_type) 10741b961ac0SChristoph Hellwig { 10751b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10761b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10771b961ac0SChristoph Hellwig } 10781b961ac0SChristoph Hellwig 10791b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10801b961ac0SChristoph Hellwig int fh_len, int fh_type) 10811b961ac0SChristoph Hellwig { 10821b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10831b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1084ac27a0ecSDave Kleikamp } 1085ac27a0ecSDave Kleikamp 1086c39a7f84SToshiyuki Okajima /* 1087c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1088c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1089c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1090c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1091c39a7f84SToshiyuki Okajima */ 10920b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10930b8e58a1SAndreas Dilger gfp_t wait) 1094c39a7f84SToshiyuki Okajima { 1095c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1096c39a7f84SToshiyuki Okajima 1097c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1098c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1099c39a7f84SToshiyuki Okajima return 0; 1100c39a7f84SToshiyuki Okajima if (journal) 1101c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1102c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1103c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1104c39a7f84SToshiyuki Okajima } 1105c39a7f84SToshiyuki Okajima 1106ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1107ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1108ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1109ac27a0ecSDave Kleikamp 1110617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1111617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1112617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1113617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1114617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11156f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1116f00c9e44SJan Kara struct path *path); 11177c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 11187c319d32SAditya Kali int format_id); 1119ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 11207c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type); 1121617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1122617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1123ac27a0ecSDave Kleikamp size_t len, loff_t off); 1124617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1125ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 11267c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 11277c319d32SAditya Kali unsigned int flags); 11287c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1129ac27a0ecSDave Kleikamp 113061e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 113160e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1132617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1133617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1134617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1135617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1136a5b5ee32SJan Kara .write_info = ext4_write_info, 1137a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1138a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1139ac27a0ecSDave Kleikamp }; 1140ac27a0ecSDave Kleikamp 11410d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1142617ba13bSMingming Cao .quota_on = ext4_quota_on, 1143ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1144287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1145287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1146287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1147287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1148287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1149ac27a0ecSDave Kleikamp }; 11507c319d32SAditya Kali 11517c319d32SAditya Kali static const struct quotactl_ops ext4_qctl_sysfile_operations = { 11527c319d32SAditya Kali .quota_on_meta = ext4_quota_on_sysfile, 11537c319d32SAditya Kali .quota_off = ext4_quota_off_sysfile, 11547c319d32SAditya Kali .quota_sync = dquot_quota_sync, 11557c319d32SAditya Kali .get_info = dquot_get_dqinfo, 11567c319d32SAditya Kali .set_info = dquot_set_dqinfo, 11577c319d32SAditya Kali .get_dqblk = dquot_get_dqblk, 11587c319d32SAditya Kali .set_dqblk = dquot_set_dqblk 11597c319d32SAditya Kali }; 1160ac27a0ecSDave Kleikamp #endif 1161ac27a0ecSDave Kleikamp 1162ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1163617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1164617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1165617ba13bSMingming Cao .write_inode = ext4_write_inode, 1166617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11677ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11680930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1169617ba13bSMingming Cao .put_super = ext4_put_super, 1170617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1171c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1172c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1173617ba13bSMingming Cao .statfs = ext4_statfs, 1174617ba13bSMingming Cao .remount_fs = ext4_remount, 1175617ba13bSMingming Cao .show_options = ext4_show_options, 1176ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1177617ba13bSMingming Cao .quota_read = ext4_quota_read, 1178617ba13bSMingming Cao .quota_write = ext4_quota_write, 1179ac27a0ecSDave Kleikamp #endif 1180c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1181ac27a0ecSDave Kleikamp }; 1182ac27a0ecSDave Kleikamp 11839ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11849ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11859ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11869ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11879ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11887ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11890930fcc1SAl Viro .evict_inode = ext4_evict_inode, 11909ca92389STheodore Ts'o .put_super = ext4_put_super, 11919ca92389STheodore Ts'o .statfs = ext4_statfs, 11929ca92389STheodore Ts'o .remount_fs = ext4_remount, 11939ca92389STheodore Ts'o .show_options = ext4_show_options, 11949ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 11959ca92389STheodore Ts'o .quota_read = ext4_quota_read, 11969ca92389STheodore Ts'o .quota_write = ext4_quota_write, 11979ca92389STheodore Ts'o #endif 11989ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 11999ca92389STheodore Ts'o }; 12009ca92389STheodore Ts'o 120139655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12021b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12031b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1204617ba13bSMingming Cao .get_parent = ext4_get_parent, 1205ac27a0ecSDave Kleikamp }; 1206ac27a0ecSDave Kleikamp 1207ac27a0ecSDave Kleikamp enum { 1208ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1209ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 121072578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1211ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 121272578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 121330773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 121443e625d8SEric Sandeen Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, 1215ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1216296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1217ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 12185a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1219ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1220661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 12211449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 12221449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 12235328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1224744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1225fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1226df981d03STheodore Ts'o Opt_max_dir_size_kb, 1227ac27a0ecSDave Kleikamp }; 1228ac27a0ecSDave Kleikamp 1229a447c093SSteven Whitehouse static const match_table_t tokens = { 1230ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1231ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1232ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1233ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1234ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1235ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1236ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1237ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1238ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1239ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1240ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1241ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1242ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1243ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 124472578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 124572578c33STheodore Ts'o {Opt_removed, "orlov"}, 1246ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1247ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1248ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1249ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1250e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 12515a916be1STheodore Ts'o {Opt_noload, "noload"}, 125272578c33STheodore Ts'o {Opt_removed, "nobh"}, 125372578c33STheodore Ts'o {Opt_removed, "bh"}, 1254ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 125530773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 125630773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1257ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1258818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1259818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1260ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1261ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1262ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1263ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12645bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12655bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1266ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1267ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1268ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1269ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1270ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1271ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12725a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1273ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1274ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1275ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1276ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1277ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 127806705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 127906705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 128025ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1281c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 128264769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1283dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 128436ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 128536ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 12866fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12876fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1288240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1289b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1290afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 129106705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 129206705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1293744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1294744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12955328e635SEric Sandeen {Opt_discard, "discard"}, 12965328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1297fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1298fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1299fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1300df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1301c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1302c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1303c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1304c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1305c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1306f3f12faaSJosef Bacik {Opt_err, NULL}, 1307ac27a0ecSDave Kleikamp }; 1308ac27a0ecSDave Kleikamp 1309617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1310ac27a0ecSDave Kleikamp { 1311617ba13bSMingming Cao ext4_fsblk_t sb_block; 1312ac27a0ecSDave Kleikamp char *options = (char *) *data; 1313ac27a0ecSDave Kleikamp 1314ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1315ac27a0ecSDave Kleikamp return 1; /* Default location */ 13160b8e58a1SAndreas Dilger 1317ac27a0ecSDave Kleikamp options += 3; 13180b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1319ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1320ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13214776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1322ac27a0ecSDave Kleikamp (char *) *data); 1323ac27a0ecSDave Kleikamp return 1; 1324ac27a0ecSDave Kleikamp } 1325ac27a0ecSDave Kleikamp if (*options == ',') 1326ac27a0ecSDave Kleikamp options++; 1327ac27a0ecSDave Kleikamp *data = (void *) options; 13280b8e58a1SAndreas Dilger 1329ac27a0ecSDave Kleikamp return sb_block; 1330ac27a0ecSDave Kleikamp } 1331ac27a0ecSDave Kleikamp 1332b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1333437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1334437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1335b3881f74STheodore Ts'o 133656c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 133756c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 133856c50f11SDmitry Monakhov { 133956c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 134056c50f11SDmitry Monakhov char *qname; 134103dafb5fSChen Gang int ret = -1; 134256c50f11SDmitry Monakhov 134356c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 134456c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 134556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 134656c50f11SDmitry Monakhov "Cannot change journaled " 134756c50f11SDmitry Monakhov "quota options when quota turned on"); 134857f73c2cSTheodore Ts'o return -1; 134956c50f11SDmitry Monakhov } 135056c50f11SDmitry Monakhov qname = match_strdup(args); 135156c50f11SDmitry Monakhov if (!qname) { 135256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 135356c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 135457f73c2cSTheodore Ts'o return -1; 135556c50f11SDmitry Monakhov } 135603dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 135703dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 135803dafb5fSChen Gang ret = 1; 135903dafb5fSChen Gang else 136056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 136103dafb5fSChen Gang "%s quota file already specified", 136203dafb5fSChen Gang QTYPE2NAME(qtype)); 136303dafb5fSChen Gang goto errout; 136456c50f11SDmitry Monakhov } 136503dafb5fSChen Gang if (strchr(qname, '/')) { 136656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 136756c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 136803dafb5fSChen Gang goto errout; 136956c50f11SDmitry Monakhov } 137003dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1371fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 137256c50f11SDmitry Monakhov return 1; 137303dafb5fSChen Gang errout: 137403dafb5fSChen Gang kfree(qname); 137503dafb5fSChen Gang return ret; 137656c50f11SDmitry Monakhov } 137756c50f11SDmitry Monakhov 137856c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 137956c50f11SDmitry Monakhov { 138056c50f11SDmitry Monakhov 138156c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 138256c50f11SDmitry Monakhov 138356c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 138456c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 138556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 138656c50f11SDmitry Monakhov " when quota turned on"); 138757f73c2cSTheodore Ts'o return -1; 138856c50f11SDmitry Monakhov } 138903dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 139056c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 139156c50f11SDmitry Monakhov return 1; 139256c50f11SDmitry Monakhov } 139356c50f11SDmitry Monakhov #endif 139456c50f11SDmitry Monakhov 139526092bf5STheodore Ts'o #define MOPT_SET 0x0001 139626092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 139726092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 139826092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 139926092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 140026092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 140126092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 140226092bf5STheodore Ts'o #define MOPT_Q 0 140326092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 140426092bf5STheodore Ts'o #else 140526092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 140626092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 140726092bf5STheodore Ts'o #endif 140826092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 140926092bf5STheodore Ts'o 141026092bf5STheodore Ts'o static const struct mount_opts { 141126092bf5STheodore Ts'o int token; 141226092bf5STheodore Ts'o int mount_opt; 141326092bf5STheodore Ts'o int flags; 141426092bf5STheodore Ts'o } ext4_mount_opts[] = { 141526092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 141626092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 141726092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 141826092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 141926092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 142026092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 142126092bf5STheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_SET}, 142226092bf5STheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_CLEAR}, 142326092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 142426092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 142526092bf5STheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, MOPT_SET | MOPT_EXPLICIT}, 142626092bf5STheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, MOPT_CLEAR | MOPT_EXPLICIT}, 142726092bf5STheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, MOPT_SET}, 142826092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 142926092bf5STheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), MOPT_SET}, 143026092bf5STheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_SET}, 143126092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 143226092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 143326092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 143426092bf5STheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_SET}, 143526092bf5STheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_CLEAR}, 143626092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 143726092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 143826092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 143926092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 144026092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 144126092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 144226092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 144326092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 144426092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 144526092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 144626092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 14470efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 14480efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 14490efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 14500efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 145126092bf5STheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ}, 145226092bf5STheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ}, 145326092bf5STheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ}, 145426092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 145526092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 145626092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 145726092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 145826092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 145926092bf5STheodore Ts'o #else 146026092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 146126092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 146226092bf5STheodore Ts'o #endif 146326092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 146426092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 146526092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 146626092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 146726092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 146826092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 146926092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 147026092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 147126092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 147226092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 147326092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 147426092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 147526092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 147626092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 147726092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 147826092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1479df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 148026092bf5STheodore Ts'o {Opt_err, 0, 0} 148126092bf5STheodore Ts'o }; 148226092bf5STheodore Ts'o 148326092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 148426092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 148526092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 148626092bf5STheodore Ts'o { 148726092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 148826092bf5STheodore Ts'o const struct mount_opts *m; 148908cefc7aSEric W. Biederman kuid_t uid; 149008cefc7aSEric W. Biederman kgid_t gid; 149126092bf5STheodore Ts'o int arg = 0; 149226092bf5STheodore Ts'o 149357f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 149457f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 149557f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 149657f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 149757f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 149857f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 149957f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 150057f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 150157f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 150257f73c2cSTheodore Ts'o #endif 150326092bf5STheodore Ts'o switch (token) { 1504f7048605STheodore Ts'o case Opt_noacl: 1505f7048605STheodore Ts'o case Opt_nouser_xattr: 1506f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1507f7048605STheodore Ts'o break; 150826092bf5STheodore Ts'o case Opt_sb: 150926092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 151026092bf5STheodore Ts'o case Opt_removed: 15115f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 151226092bf5STheodore Ts'o return 1; 151326092bf5STheodore Ts'o case Opt_abort: 151426092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 151526092bf5STheodore Ts'o return 1; 151626092bf5STheodore Ts'o case Opt_i_version: 151726092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 151826092bf5STheodore Ts'o return 1; 151926092bf5STheodore Ts'o } 152026092bf5STheodore Ts'o 15215f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 15225f3633e3SJan Kara if (token == m->token) 15235f3633e3SJan Kara break; 15245f3633e3SJan Kara 15255f3633e3SJan Kara if (m->token == Opt_err) { 15265f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 15275f3633e3SJan Kara "or missing value", opt); 15285f3633e3SJan Kara return -1; 15295f3633e3SJan Kara } 15305f3633e3SJan Kara 15310efb3b23SJan Kara if (args->from && match_int(args, &arg)) 15320efb3b23SJan Kara return -1; 153326092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 153426092bf5STheodore Ts'o return -1; 153526092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 153626092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 153726092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 153826092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 153926092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 154026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 154126092bf5STheodore Ts'o "options when quota turned on"); 154226092bf5STheodore Ts'o return -1; 154326092bf5STheodore Ts'o } 154426092bf5STheodore Ts'o 154526092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 154626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 154726092bf5STheodore Ts'o } else if (token == Opt_commit) { 154826092bf5STheodore Ts'o if (arg == 0) 154926092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 155026092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 155126092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 155226092bf5STheodore Ts'o if (arg == 0) 155326092bf5STheodore Ts'o arg = EXT4_DEF_MAX_BATCH_TIME; 155426092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 155526092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 155626092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 155726092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1558*e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1559*e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1560*e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1561*e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 156226092bf5STheodore Ts'o return -1; 156326092bf5STheodore Ts'o } 156426092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 156526092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 156626092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 156726092bf5STheodore Ts'o if (!args->from) 156826092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 156926092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1570df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1571df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 157226092bf5STheodore Ts'o } else if (token == Opt_stripe) { 157326092bf5STheodore Ts'o sbi->s_stripe = arg; 15740efb3b23SJan Kara } else if (token == Opt_resuid) { 15750efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15760efb3b23SJan Kara if (!uid_valid(uid)) { 15775f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15780efb3b23SJan Kara return -1; 15790efb3b23SJan Kara } 15800efb3b23SJan Kara sbi->s_resuid = uid; 15810efb3b23SJan Kara } else if (token == Opt_resgid) { 15820efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15830efb3b23SJan Kara if (!gid_valid(gid)) { 15845f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15850efb3b23SJan Kara return -1; 15860efb3b23SJan Kara } 15870efb3b23SJan Kara sbi->s_resgid = gid; 15880efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15890efb3b23SJan Kara if (is_remount) { 15900efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15910efb3b23SJan Kara "Cannot specify journal on remount"); 15920efb3b23SJan Kara return -1; 15930efb3b23SJan Kara } 15940efb3b23SJan Kara *journal_devnum = arg; 15950efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 15960efb3b23SJan Kara if (arg > 7) { 15975f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 15980efb3b23SJan Kara " (must be 0-7)"); 15990efb3b23SJan Kara return -1; 16000efb3b23SJan Kara } 16010efb3b23SJan Kara *journal_ioprio = 16020efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 160326092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 160426092bf5STheodore Ts'o if (is_remount) { 160526092bf5STheodore Ts'o if (!sbi->s_journal) 160626092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 16075f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 160826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 160926092bf5STheodore Ts'o "Cannot change data mode on remount"); 161026092bf5STheodore Ts'o return -1; 161126092bf5STheodore Ts'o } 161226092bf5STheodore Ts'o } else { 161326092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 161426092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 161526092bf5STheodore Ts'o } 161626092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 161726092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 161826092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 161926092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16205f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16215f3633e3SJan Kara "quota options when quota turned on"); 162226092bf5STheodore Ts'o return -1; 162326092bf5STheodore Ts'o } 162426092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 162526092bf5STheodore Ts'o #endif 162626092bf5STheodore Ts'o } else { 162726092bf5STheodore Ts'o if (!args->from) 162826092bf5STheodore Ts'o arg = 1; 162926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 163026092bf5STheodore Ts'o arg = !arg; 163126092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 163226092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 163326092bf5STheodore Ts'o "buggy handling of option %s", opt); 163426092bf5STheodore Ts'o WARN_ON(1); 163526092bf5STheodore Ts'o return -1; 163626092bf5STheodore Ts'o } 163726092bf5STheodore Ts'o if (arg != 0) 163826092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 163926092bf5STheodore Ts'o else 164026092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 164126092bf5STheodore Ts'o } 164226092bf5STheodore Ts'o return 1; 164326092bf5STheodore Ts'o } 164426092bf5STheodore Ts'o 1645ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1646c3191067STheodore Ts'o unsigned long *journal_devnum, 1647b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1648661aa520SEric Sandeen int is_remount) 1649ac27a0ecSDave Kleikamp { 1650617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1651ac27a0ecSDave Kleikamp char *p; 1652ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 165326092bf5STheodore Ts'o int token; 1654ac27a0ecSDave Kleikamp 1655ac27a0ecSDave Kleikamp if (!options) 1656ac27a0ecSDave Kleikamp return 1; 1657ac27a0ecSDave Kleikamp 1658ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1659ac27a0ecSDave Kleikamp if (!*p) 1660ac27a0ecSDave Kleikamp continue; 166115121c18SEric Sandeen /* 166215121c18SEric Sandeen * Initialize args struct so we know whether arg was 166315121c18SEric Sandeen * found; some options take optional arguments. 166415121c18SEric Sandeen */ 1665caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1666ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 166726092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 166826092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1669ac27a0ecSDave Kleikamp return 0; 1670ac27a0ecSDave Kleikamp } 1671ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1672ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1673482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1674fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1675ac27a0ecSDave Kleikamp 1676482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1677fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1678ac27a0ecSDave Kleikamp 167956c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1680b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1681b31e1552SEric Sandeen "format mixing"); 1682ac27a0ecSDave Kleikamp return 0; 1683ac27a0ecSDave Kleikamp } 1684ac27a0ecSDave Kleikamp 1685ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1686b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1687b31e1552SEric Sandeen "not specified"); 1688ac27a0ecSDave Kleikamp return 0; 1689ac27a0ecSDave Kleikamp } 1690ac27a0ecSDave Kleikamp } else { 1691ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1692b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 16932c8be6b2SJan Kara "specified with no journaling " 1694b31e1552SEric Sandeen "enabled"); 1695ac27a0ecSDave Kleikamp return 0; 1696ac27a0ecSDave Kleikamp } 1697ac27a0ecSDave Kleikamp } 1698ac27a0ecSDave Kleikamp #endif 1699261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1700261cb20cSJan Kara int blocksize = 1701261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1702261cb20cSJan Kara 1703261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1704261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1705261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1706261cb20cSJan Kara return 0; 1707261cb20cSJan Kara } 1708261cb20cSJan Kara } 1709ac27a0ecSDave Kleikamp return 1; 1710ac27a0ecSDave Kleikamp } 1711ac27a0ecSDave Kleikamp 17122adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17132adf6da8STheodore Ts'o struct super_block *sb) 17142adf6da8STheodore Ts'o { 17152adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17162adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17172adf6da8STheodore Ts'o 17182adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17192adf6da8STheodore Ts'o char *fmtname = ""; 17202adf6da8STheodore Ts'o 17212adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17222adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17232adf6da8STheodore Ts'o fmtname = "vfsold"; 17242adf6da8STheodore Ts'o break; 17252adf6da8STheodore Ts'o case QFMT_VFS_V0: 17262adf6da8STheodore Ts'o fmtname = "vfsv0"; 17272adf6da8STheodore Ts'o break; 17282adf6da8STheodore Ts'o case QFMT_VFS_V1: 17292adf6da8STheodore Ts'o fmtname = "vfsv1"; 17302adf6da8STheodore Ts'o break; 17312adf6da8STheodore Ts'o } 17322adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17332adf6da8STheodore Ts'o } 17342adf6da8STheodore Ts'o 17352adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17362adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17372adf6da8STheodore Ts'o 17382adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17392adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17402adf6da8STheodore Ts'o 17412adf6da8STheodore Ts'o if (test_opt(sb, USRQUOTA)) 17422adf6da8STheodore Ts'o seq_puts(seq, ",usrquota"); 17432adf6da8STheodore Ts'o 17442adf6da8STheodore Ts'o if (test_opt(sb, GRPQUOTA)) 17452adf6da8STheodore Ts'o seq_puts(seq, ",grpquota"); 17462adf6da8STheodore Ts'o #endif 17472adf6da8STheodore Ts'o } 17482adf6da8STheodore Ts'o 17495a916be1STheodore Ts'o static const char *token2str(int token) 17505a916be1STheodore Ts'o { 175150df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17525a916be1STheodore Ts'o 17535a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17545a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17555a916be1STheodore Ts'o break; 17565a916be1STheodore Ts'o return t->pattern; 17575a916be1STheodore Ts'o } 17585a916be1STheodore Ts'o 17592adf6da8STheodore Ts'o /* 17602adf6da8STheodore Ts'o * Show an option if 17612adf6da8STheodore Ts'o * - it's set to a non-default value OR 17622adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17632adf6da8STheodore Ts'o */ 176466acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 176566acdcf4STheodore Ts'o int nodefs) 17662adf6da8STheodore Ts'o { 17672adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17682adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 176966acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17705a916be1STheodore Ts'o const struct mount_opts *m; 177166acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17722adf6da8STheodore Ts'o 177366acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 177466acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17752adf6da8STheodore Ts'o 17762adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17775a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17785a916be1STheodore Ts'o 17795a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17805a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17815a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17825a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17835a916be1STheodore Ts'o continue; 178466acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17855a916be1STheodore Ts'o continue; /* skip if same as the default */ 17865a916be1STheodore Ts'o if ((want_set && 17875a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17885a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17895a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17905a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17915a916be1STheodore Ts'o } 17925a916be1STheodore Ts'o 179308cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17945a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 179508cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 179608cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 179708cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 17985a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 179908cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 180008cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 180166acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 18025a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18035a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18042adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18055a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18062adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18075a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 180866acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18095a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 181066acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18115a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 181266acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18135a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18142adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18155a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 181666acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18175a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 181866acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18192adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18205a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18212adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18225a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18232adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18245a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18255a916be1STheodore Ts'o } 182666acdcf4STheodore Ts'o if (nodefs || 182766acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18285a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18292adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18302adf6da8STheodore Ts'o 183166acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 183266acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18335a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1834df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1835df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18362adf6da8STheodore Ts'o 18372adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18382adf6da8STheodore Ts'o return 0; 18392adf6da8STheodore Ts'o } 18402adf6da8STheodore Ts'o 184166acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 184266acdcf4STheodore Ts'o { 184366acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 184466acdcf4STheodore Ts'o } 184566acdcf4STheodore Ts'o 184666acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 184766acdcf4STheodore Ts'o { 184866acdcf4STheodore Ts'o struct super_block *sb = seq->private; 184966acdcf4STheodore Ts'o int rc; 185066acdcf4STheodore Ts'o 185166acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 185266acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 185366acdcf4STheodore Ts'o seq_puts(seq, "\n"); 185466acdcf4STheodore Ts'o return rc; 185566acdcf4STheodore Ts'o } 185666acdcf4STheodore Ts'o 185766acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 185866acdcf4STheodore Ts'o { 185966acdcf4STheodore Ts'o return single_open(file, options_seq_show, PDE(inode)->data); 186066acdcf4STheodore Ts'o } 186166acdcf4STheodore Ts'o 186266acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 186366acdcf4STheodore Ts'o .owner = THIS_MODULE, 186466acdcf4STheodore Ts'o .open = options_open_fs, 186566acdcf4STheodore Ts'o .read = seq_read, 186666acdcf4STheodore Ts'o .llseek = seq_lseek, 186766acdcf4STheodore Ts'o .release = single_release, 186866acdcf4STheodore Ts'o }; 186966acdcf4STheodore Ts'o 1870617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1871ac27a0ecSDave Kleikamp int read_only) 1872ac27a0ecSDave Kleikamp { 1873617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1874ac27a0ecSDave Kleikamp int res = 0; 1875ac27a0ecSDave Kleikamp 1876617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1877b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1878b31e1552SEric Sandeen "forcing read-only mode"); 1879ac27a0ecSDave Kleikamp res = MS_RDONLY; 1880ac27a0ecSDave Kleikamp } 1881ac27a0ecSDave Kleikamp if (read_only) 1882281b5995STheodore Ts'o goto done; 1883617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1884b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1885b31e1552SEric Sandeen "running e2fsck is recommended"); 1886617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1887b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1888b31e1552SEric Sandeen "warning: mounting fs with errors, " 1889b31e1552SEric Sandeen "running e2fsck is recommended"); 1890ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1891ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1892ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1893b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1894b31e1552SEric Sandeen "warning: maximal mount count reached, " 1895b31e1552SEric Sandeen "running e2fsck is recommended"); 1896ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1897ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1898ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1899b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1900b31e1552SEric Sandeen "warning: checktime reached, " 1901b31e1552SEric Sandeen "running e2fsck is recommended"); 19020390131bSFrank Mayhar if (!sbi->s_journal) 1903216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1904ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1905617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1906e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1907ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1908617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19090390131bSFrank Mayhar if (sbi->s_journal) 1910617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1911ac27a0ecSDave Kleikamp 1912e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1913281b5995STheodore Ts'o done: 1914ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1915a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1916a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1917ac27a0ecSDave Kleikamp sb->s_blocksize, 1918ac27a0ecSDave Kleikamp sbi->s_groups_count, 1919617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1920617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1921a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1922ac27a0ecSDave Kleikamp 19237abc52c2SDan Magenheimer cleancache_init_fs(sb); 1924ac27a0ecSDave Kleikamp return res; 1925ac27a0ecSDave Kleikamp } 1926ac27a0ecSDave Kleikamp 1927117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1928117fff10STheodore Ts'o { 1929117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1930117fff10STheodore Ts'o struct flex_groups *new_groups; 1931117fff10STheodore Ts'o int size; 1932117fff10STheodore Ts'o 1933117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1934117fff10STheodore Ts'o return 0; 1935117fff10STheodore Ts'o 1936117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1937117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1938117fff10STheodore Ts'o return 0; 1939117fff10STheodore Ts'o 1940117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1941117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1942117fff10STheodore Ts'o if (!new_groups) { 1943117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1944117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1945117fff10STheodore Ts'o return -ENOMEM; 1946117fff10STheodore Ts'o } 1947117fff10STheodore Ts'o 1948117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1949117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1950117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1951117fff10STheodore Ts'o sizeof(struct flex_groups))); 1952117fff10STheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 1953117fff10STheodore Ts'o } 1954117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1955117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1956117fff10STheodore Ts'o return 0; 1957117fff10STheodore Ts'o } 1958117fff10STheodore Ts'o 1959772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1960772cb7c8SJose R. Santos { 1961772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1962772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1963772cb7c8SJose R. Santos ext4_group_t flex_group; 1964d50f2ab6SXi Wang unsigned int groups_per_flex = 0; 1965117fff10STheodore Ts'o int i, err; 1966772cb7c8SJose R. Santos 1967503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1968d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1969772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1970772cb7c8SJose R. Santos return 1; 1971772cb7c8SJose R. Santos } 197276495ec1SLukas Czerner groups_per_flex = 1U << sbi->s_log_groups_per_flex; 1973772cb7c8SJose R. Santos 1974117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1975117fff10STheodore Ts'o if (err) 1976772cb7c8SJose R. Santos goto failed; 1977772cb7c8SJose R. Santos 1978772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 197988b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1980772cb7c8SJose R. Santos 1981772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19827ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19837ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 1984021b65bbSTheodore Ts'o atomic_add(ext4_free_group_clusters(sb, gdp), 198524aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19867ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19877ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1988772cb7c8SJose R. Santos } 1989772cb7c8SJose R. Santos 1990772cb7c8SJose R. Santos return 1; 1991772cb7c8SJose R. Santos failed: 1992772cb7c8SJose R. Santos return 0; 1993772cb7c8SJose R. Santos } 1994772cb7c8SJose R. Santos 1995feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1996717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1997717d50e4SAndreas Dilger { 1998feb0ab32SDarrick J. Wong int offset; 1999717d50e4SAndreas Dilger __u16 crc = 0; 2000717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2001717d50e4SAndreas Dilger 2002feb0ab32SDarrick J. Wong if ((sbi->s_es->s_feature_ro_compat & 2003feb0ab32SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { 2004feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2005feb0ab32SDarrick J. Wong __u16 old_csum; 2006feb0ab32SDarrick J. Wong __u32 csum32; 2007feb0ab32SDarrick J. Wong 2008feb0ab32SDarrick J. Wong old_csum = gdp->bg_checksum; 2009feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 2010feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2011feb0ab32SDarrick J. Wong sizeof(le_group)); 2012feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2013feb0ab32SDarrick J. Wong sbi->s_desc_size); 2014feb0ab32SDarrick J. Wong gdp->bg_checksum = old_csum; 2015feb0ab32SDarrick J. Wong 2016feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2017feb0ab32SDarrick J. Wong goto out; 2018feb0ab32SDarrick J. Wong } 2019feb0ab32SDarrick J. Wong 2020feb0ab32SDarrick J. Wong /* old crc16 code */ 2021feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2022feb0ab32SDarrick J. Wong 2023717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2024717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2025717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2026717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2027717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2028717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2029717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2030717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2031717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2032717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2033717d50e4SAndreas Dilger offset); 2034717d50e4SAndreas Dilger 2035feb0ab32SDarrick J. Wong out: 2036717d50e4SAndreas Dilger return cpu_to_le16(crc); 2037717d50e4SAndreas Dilger } 2038717d50e4SAndreas Dilger 2039feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2040717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2041717d50e4SAndreas Dilger { 2042feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2043feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2044feb0ab32SDarrick J. Wong block_group, gdp))) 2045717d50e4SAndreas Dilger return 0; 2046717d50e4SAndreas Dilger 2047717d50e4SAndreas Dilger return 1; 2048717d50e4SAndreas Dilger } 2049717d50e4SAndreas Dilger 2050feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2051feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2052feb0ab32SDarrick J. Wong { 2053feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2054feb0ab32SDarrick J. Wong return; 2055feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2056feb0ab32SDarrick J. Wong } 2057feb0ab32SDarrick J. Wong 2058ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2059bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2060bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2061ac27a0ecSDave Kleikamp { 2062617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2063617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2064617ba13bSMingming Cao ext4_fsblk_t last_block; 2065bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2066bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2067bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2068ce421581SJose R. Santos int flexbg_flag = 0; 2069bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2070ac27a0ecSDave Kleikamp 2071ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2072ce421581SJose R. Santos flexbg_flag = 1; 2073ce421581SJose R. Santos 2074617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2075ac27a0ecSDave Kleikamp 2076197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2077197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2078197cd65aSAkinobu Mita 2079ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2080bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2081ac27a0ecSDave Kleikamp else 2082ac27a0ecSDave Kleikamp last_block = first_block + 2083617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2084ac27a0ecSDave Kleikamp 2085bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2086bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2087bfff6873SLukas Czerner grp = i; 2088bfff6873SLukas Czerner 20898fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20902b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2091b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2092a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2093b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2094ac27a0ecSDave Kleikamp return 0; 2095ac27a0ecSDave Kleikamp } 20968fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20972b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2098b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2099a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2100b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2101ac27a0ecSDave Kleikamp return 0; 2102ac27a0ecSDave Kleikamp } 21038fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2104bd81d8eeSLaurent Vivier if (inode_table < first_block || 21052b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2106b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2107a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2108b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2109ac27a0ecSDave Kleikamp return 0; 2110ac27a0ecSDave Kleikamp } 2111955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2112feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2113b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2114b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2115fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2116fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21177ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2118955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2119717d50e4SAndreas Dilger return 0; 2120717d50e4SAndreas Dilger } 21217ee1ec4cSLi Zefan } 2122955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2123ce421581SJose R. Santos if (!flexbg_flag) 2124617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2125ac27a0ecSDave Kleikamp } 2126bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2127bfff6873SLukas Czerner *first_not_zeroed = grp; 2128ac27a0ecSDave Kleikamp 21295dee5437STheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 21305dee5437STheodore Ts'o EXT4_C2B(sbi, ext4_count_free_clusters(sb))); 2131617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2132ac27a0ecSDave Kleikamp return 1; 2133ac27a0ecSDave Kleikamp } 2134ac27a0ecSDave Kleikamp 2135617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2136ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2137ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2138ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2139ac27a0ecSDave Kleikamp * 2140ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2141ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2142ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2143ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2144ac27a0ecSDave Kleikamp * 2145ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2146ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2147ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2148617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2149ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2150ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2151ac27a0ecSDave Kleikamp */ 2152617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2153617ba13bSMingming Cao struct ext4_super_block *es) 2154ac27a0ecSDave Kleikamp { 2155ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2156ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2157ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2158ac27a0ecSDave Kleikamp int i; 2159ac27a0ecSDave Kleikamp #endif 2160ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2161ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2162ac27a0ecSDave Kleikamp return; 2163ac27a0ecSDave Kleikamp } 2164ac27a0ecSDave Kleikamp 2165a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2166b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2167b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2168a8f48a95SEric Sandeen return; 2169a8f48a95SEric Sandeen } 2170a8f48a95SEric Sandeen 2171d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2172d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2173d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2174d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2175d39195c3SAmir Goldstein return; 2176d39195c3SAmir Goldstein } 2177d39195c3SAmir Goldstein 2178617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2179c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2180c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 2181ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2182ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2183ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2184c25f9bc6SEric Sandeen } 2185ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2186ac27a0ecSDave Kleikamp return; 2187ac27a0ecSDave Kleikamp } 2188ac27a0ecSDave Kleikamp 2189ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2190b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2191ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2192ac27a0ecSDave Kleikamp } 2193ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2194ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2195ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2196ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2197ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2198617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2199617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2200ac27a0ecSDave Kleikamp if (ret < 0) 2201b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2202b31e1552SEric Sandeen "Cannot turn on journaled " 2203b31e1552SEric Sandeen "quota: error %d", ret); 2204ac27a0ecSDave Kleikamp } 2205ac27a0ecSDave Kleikamp } 2206ac27a0ecSDave Kleikamp #endif 2207ac27a0ecSDave Kleikamp 2208ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2209ac27a0ecSDave Kleikamp struct inode *inode; 2210ac27a0ecSDave Kleikamp 221197bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 221297bd42b9SJosef Bacik if (IS_ERR(inode)) { 2213ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2214ac27a0ecSDave Kleikamp break; 2215ac27a0ecSDave Kleikamp } 2216ac27a0ecSDave Kleikamp 2217617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2218871a2931SChristoph Hellwig dquot_initialize(inode); 2219ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2220b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2221b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 222246e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2223e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2224ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2225721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 2226617ba13bSMingming Cao ext4_truncate(inode); 2227721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2228ac27a0ecSDave Kleikamp nr_truncates++; 2229ac27a0ecSDave Kleikamp } else { 2230b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2231b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 223246e665e9SHarvey Harrison __func__, inode->i_ino); 2233ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2234ac27a0ecSDave Kleikamp inode->i_ino); 2235ac27a0ecSDave Kleikamp nr_orphans++; 2236ac27a0ecSDave Kleikamp } 2237ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2238ac27a0ecSDave Kleikamp } 2239ac27a0ecSDave Kleikamp 2240ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2241ac27a0ecSDave Kleikamp 2242ac27a0ecSDave Kleikamp if (nr_orphans) 2243b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2244b31e1552SEric Sandeen PLURAL(nr_orphans)); 2245ac27a0ecSDave Kleikamp if (nr_truncates) 2246b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2247b31e1552SEric Sandeen PLURAL(nr_truncates)); 2248ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2249ac27a0ecSDave Kleikamp /* Turn quotas off */ 2250ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2251ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2252287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2253ac27a0ecSDave Kleikamp } 2254ac27a0ecSDave Kleikamp #endif 2255ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2256ac27a0ecSDave Kleikamp } 22570b8e58a1SAndreas Dilger 2258cd2291a4SEric Sandeen /* 2259cd2291a4SEric Sandeen * Maximal extent format file size. 2260cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2261cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2262cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2263cd2291a4SEric Sandeen * so that won't be a limiting factor. 2264cd2291a4SEric Sandeen * 2265f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2266f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2267f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2268f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2269f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2270f17722f9SLukas Czerner * 2271cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2272cd2291a4SEric Sandeen */ 2273f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2274cd2291a4SEric Sandeen { 2275cd2291a4SEric Sandeen loff_t res; 2276cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2277cd2291a4SEric Sandeen 2278cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2279f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2280cd2291a4SEric Sandeen /* 228190c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2282cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2283cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2284cd2291a4SEric Sandeen */ 2285cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2286cd2291a4SEric Sandeen 2287cd2291a4SEric Sandeen /* total blocks in file system block size */ 2288cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2289cd2291a4SEric Sandeen upper_limit <<= blkbits; 2290cd2291a4SEric Sandeen } 2291cd2291a4SEric Sandeen 2292f17722f9SLukas Czerner /* 2293f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2294f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2295f17722f9SLukas Czerner * size 2296f17722f9SLukas Czerner */ 2297f17722f9SLukas Czerner res = (1LL << 32) - 1; 2298cd2291a4SEric Sandeen res <<= blkbits; 2299cd2291a4SEric Sandeen 2300cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2301cd2291a4SEric Sandeen if (res > upper_limit) 2302cd2291a4SEric Sandeen res = upper_limit; 2303cd2291a4SEric Sandeen 2304cd2291a4SEric Sandeen return res; 2305cd2291a4SEric Sandeen } 2306ac27a0ecSDave Kleikamp 2307ac27a0ecSDave Kleikamp /* 2308cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23090fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23100fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2311ac27a0ecSDave Kleikamp */ 2312f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2313ac27a0ecSDave Kleikamp { 2314617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23150fc1b451SAneesh Kumar K.V int meta_blocks; 23160fc1b451SAneesh Kumar K.V loff_t upper_limit; 23170b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23180b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23190b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23200b8e58a1SAndreas Dilger * 23210b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23220b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23230fc1b451SAneesh Kumar K.V */ 23240fc1b451SAneesh Kumar K.V 2325f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23260fc1b451SAneesh Kumar K.V /* 232790c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23280b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23290b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23300fc1b451SAneesh Kumar K.V */ 23310fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23320fc1b451SAneesh Kumar K.V 23330fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23340fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23350fc1b451SAneesh Kumar K.V 23360fc1b451SAneesh Kumar K.V } else { 23378180a562SAneesh Kumar K.V /* 23388180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23398180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23408180a562SAneesh Kumar K.V * represent total number of blocks in 23418180a562SAneesh Kumar K.V * file system block size 23428180a562SAneesh Kumar K.V */ 23430fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23440fc1b451SAneesh Kumar K.V 23450fc1b451SAneesh Kumar K.V } 23460fc1b451SAneesh Kumar K.V 23470fc1b451SAneesh Kumar K.V /* indirect blocks */ 23480fc1b451SAneesh Kumar K.V meta_blocks = 1; 23490fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23500fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23510fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23520fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23530fc1b451SAneesh Kumar K.V 23540fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23550fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2356ac27a0ecSDave Kleikamp 2357ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2358ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2359ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2360ac27a0ecSDave Kleikamp res <<= bits; 2361ac27a0ecSDave Kleikamp if (res > upper_limit) 2362ac27a0ecSDave Kleikamp res = upper_limit; 23630fc1b451SAneesh Kumar K.V 23640fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23650fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23660fc1b451SAneesh Kumar K.V 2367ac27a0ecSDave Kleikamp return res; 2368ac27a0ecSDave Kleikamp } 2369ac27a0ecSDave Kleikamp 2370617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 237170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2372ac27a0ecSDave Kleikamp { 2373617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2374fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2375ac27a0ecSDave Kleikamp int has_super = 0; 2376ac27a0ecSDave Kleikamp 2377ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2378ac27a0ecSDave Kleikamp 2379617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2380ac27a0ecSDave Kleikamp nr < first_meta_bg) 238170bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2382ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2383617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2384ac27a0ecSDave Kleikamp has_super = 1; 23850b8e58a1SAndreas Dilger 2386617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2387ac27a0ecSDave Kleikamp } 2388ac27a0ecSDave Kleikamp 2389c9de560dSAlex Tomas /** 2390c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2391c9de560dSAlex Tomas * @sbi: In memory super block info 2392c9de560dSAlex Tomas * 2393c9de560dSAlex Tomas * If we have specified it via mount option, then 2394c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2395c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2396c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2397c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2398c9de560dSAlex Tomas * 2399c9de560dSAlex Tomas */ 2400c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2401c9de560dSAlex Tomas { 2402c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2403c9de560dSAlex Tomas unsigned long stripe_width = 2404c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24053eb08658SDan Ehrenberg int ret; 2406c9de560dSAlex Tomas 2407c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24083eb08658SDan Ehrenberg ret = sbi->s_stripe; 24093eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24103eb08658SDan Ehrenberg ret = stripe_width; 24113eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24123eb08658SDan Ehrenberg ret = stride; 24133eb08658SDan Ehrenberg else 24143eb08658SDan Ehrenberg ret = 0; 2415c9de560dSAlex Tomas 24163eb08658SDan Ehrenberg /* 24173eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24183eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24193eb08658SDan Ehrenberg */ 24203eb08658SDan Ehrenberg if (ret <= 1) 24213eb08658SDan Ehrenberg ret = 0; 2422c9de560dSAlex Tomas 24233eb08658SDan Ehrenberg return ret; 2424c9de560dSAlex Tomas } 2425ac27a0ecSDave Kleikamp 24263197ebdbSTheodore Ts'o /* sysfs supprt */ 24273197ebdbSTheodore Ts'o 24283197ebdbSTheodore Ts'o struct ext4_attr { 24293197ebdbSTheodore Ts'o struct attribute attr; 24303197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24313197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24323197ebdbSTheodore Ts'o const char *, size_t); 24333197ebdbSTheodore Ts'o int offset; 24343197ebdbSTheodore Ts'o }; 24353197ebdbSTheodore Ts'o 24363197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 24373197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 24383197ebdbSTheodore Ts'o { 24393197ebdbSTheodore Ts'o char *endp; 24403197ebdbSTheodore Ts'o 2441e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2442e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 24433197ebdbSTheodore Ts'o if (*endp || *value > max) 24443197ebdbSTheodore Ts'o return -EINVAL; 24453197ebdbSTheodore Ts'o 24463197ebdbSTheodore Ts'o return 0; 24473197ebdbSTheodore Ts'o } 24483197ebdbSTheodore Ts'o 24493197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24503197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24513197ebdbSTheodore Ts'o char *buf) 24523197ebdbSTheodore Ts'o { 24533197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24547b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24557b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24563197ebdbSTheodore Ts'o } 24573197ebdbSTheodore Ts'o 24583197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24593197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24603197ebdbSTheodore Ts'o { 24613197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24623197ebdbSTheodore Ts'o 2463f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2464f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24653197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24663197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24673197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24683197ebdbSTheodore Ts'o } 24693197ebdbSTheodore Ts'o 24703197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24713197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24723197ebdbSTheodore Ts'o { 24733197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24743197ebdbSTheodore Ts'o 2475f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2476f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24773197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2478a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24793197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2480a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24813197ebdbSTheodore Ts'o } 24823197ebdbSTheodore Ts'o 24833197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24843197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24853197ebdbSTheodore Ts'o const char *buf, size_t count) 24863197ebdbSTheodore Ts'o { 24873197ebdbSTheodore Ts'o unsigned long t; 24883197ebdbSTheodore Ts'o 24893197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 24903197ebdbSTheodore Ts'o return -EINVAL; 24913197ebdbSTheodore Ts'o 24925dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 24933197ebdbSTheodore Ts'o return -EINVAL; 24943197ebdbSTheodore Ts'o 24953197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24963197ebdbSTheodore Ts'o return count; 24973197ebdbSTheodore Ts'o } 24983197ebdbSTheodore Ts'o 24993197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25003197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25013197ebdbSTheodore Ts'o { 25023197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 25033197ebdbSTheodore Ts'o 25043197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25053197ebdbSTheodore Ts'o } 25063197ebdbSTheodore Ts'o 25073197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25083197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25093197ebdbSTheodore Ts'o const char *buf, size_t count) 25103197ebdbSTheodore Ts'o { 25113197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 25123197ebdbSTheodore Ts'o unsigned long t; 25133197ebdbSTheodore Ts'o 25143197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 25153197ebdbSTheodore Ts'o return -EINVAL; 25163197ebdbSTheodore Ts'o *ui = t; 25173197ebdbSTheodore Ts'o return count; 25183197ebdbSTheodore Ts'o } 25193197ebdbSTheodore Ts'o 25202c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25212c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25222c0544b2STheodore Ts'o const char *buf, size_t count) 25232c0544b2STheodore Ts'o { 25242c0544b2STheodore Ts'o int len = count; 25252c0544b2STheodore Ts'o 25262c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25272c0544b2STheodore Ts'o return -EPERM; 25282c0544b2STheodore Ts'o 25292c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25302c0544b2STheodore Ts'o len--; 25312c0544b2STheodore Ts'o 25322c0544b2STheodore Ts'o if (len) 25332c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25342c0544b2STheodore Ts'o return count; 25352c0544b2STheodore Ts'o } 25362c0544b2STheodore Ts'o 25373197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25383197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25393197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25403197ebdbSTheodore Ts'o .show = _show, \ 25413197ebdbSTheodore Ts'o .store = _store, \ 25423197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 25433197ebdbSTheodore Ts'o } 25443197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25453197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 25463197ebdbSTheodore Ts'o 2547857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 25483197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 25493197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 25503197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 25513197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 25523197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 25533197ebdbSTheodore Ts'o 25543197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 25553197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 25563197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 25573197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 25583197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 255911013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 25603197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 25613197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 25623197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 25633197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 25643197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 25653197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 256655138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 256767a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 25682c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 25693197ebdbSTheodore Ts'o 25703197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 25713197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 25723197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 25733197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 25743197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 257511013911SAndreas Dilger ATTR_LIST(inode_goal), 25763197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 25773197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 25783197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 25793197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 25803197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 25813197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 258255138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 258367a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 25842c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 25853197ebdbSTheodore Ts'o NULL, 25863197ebdbSTheodore Ts'o }; 25873197ebdbSTheodore Ts'o 2588857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2589857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 259027ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 25915e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2592857ac889SLukas Czerner 2593857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2594857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 259527ee40dfSLukas Czerner ATTR_LIST(batched_discard), 25965e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2597857ac889SLukas Czerner NULL, 2598857ac889SLukas Czerner }; 2599857ac889SLukas Czerner 26003197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 26013197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 26023197ebdbSTheodore Ts'o { 26033197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26043197ebdbSTheodore Ts'o s_kobj); 26053197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26063197ebdbSTheodore Ts'o 26073197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 26083197ebdbSTheodore Ts'o } 26093197ebdbSTheodore Ts'o 26103197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 26113197ebdbSTheodore Ts'o struct attribute *attr, 26123197ebdbSTheodore Ts'o const char *buf, size_t len) 26133197ebdbSTheodore Ts'o { 26143197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26153197ebdbSTheodore Ts'o s_kobj); 26163197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26173197ebdbSTheodore Ts'o 26183197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 26193197ebdbSTheodore Ts'o } 26203197ebdbSTheodore Ts'o 26213197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 26223197ebdbSTheodore Ts'o { 26233197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26243197ebdbSTheodore Ts'o s_kobj); 26253197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 26263197ebdbSTheodore Ts'o } 26273197ebdbSTheodore Ts'o 262852cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 26293197ebdbSTheodore Ts'o .show = ext4_attr_show, 26303197ebdbSTheodore Ts'o .store = ext4_attr_store, 26313197ebdbSTheodore Ts'o }; 26323197ebdbSTheodore Ts'o 26333197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 26343197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 26353197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 26363197ebdbSTheodore Ts'o .release = ext4_sb_release, 26373197ebdbSTheodore Ts'o }; 26383197ebdbSTheodore Ts'o 2639857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2640857ac889SLukas Czerner { 2641857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2642857ac889SLukas Czerner } 2643857ac889SLukas Czerner 2644857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2645857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2646857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2647857ac889SLukas Czerner .release = ext4_feat_release, 2648857ac889SLukas Czerner }; 2649857ac889SLukas Czerner 2650a13fb1a4SEric Sandeen /* 2651a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2652a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2653a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2654a13fb1a4SEric Sandeen * 0 if it cannot be. 2655a13fb1a4SEric Sandeen */ 2656a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2657a13fb1a4SEric Sandeen { 2658a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2659a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2660a13fb1a4SEric Sandeen "Couldn't mount because of " 2661a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2662a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2663a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2664a13fb1a4SEric Sandeen return 0; 2665a13fb1a4SEric Sandeen } 2666a13fb1a4SEric Sandeen 2667a13fb1a4SEric Sandeen if (readonly) 2668a13fb1a4SEric Sandeen return 1; 2669a13fb1a4SEric Sandeen 2670a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2671a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2672a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2673a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2674a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2675a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2676a13fb1a4SEric Sandeen return 0; 2677a13fb1a4SEric Sandeen } 2678a13fb1a4SEric Sandeen /* 2679a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2680a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2681a13fb1a4SEric Sandeen */ 2682a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2683a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2684a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2685a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2686a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2687a13fb1a4SEric Sandeen return 0; 2688a13fb1a4SEric Sandeen } 2689a13fb1a4SEric Sandeen } 2690bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2691bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2692bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2693bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2694bab08ab9STheodore Ts'o "extents feature\n"); 2695bab08ab9STheodore Ts'o return 0; 2696bab08ab9STheodore Ts'o } 26977c319d32SAditya Kali 26987c319d32SAditya Kali #ifndef CONFIG_QUOTA 26997c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 27007c319d32SAditya Kali !readonly) { 27017c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 27027c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 27037c319d32SAditya Kali "without CONFIG_QUOTA"); 27047c319d32SAditya Kali return 0; 27057c319d32SAditya Kali } 27067c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2707a13fb1a4SEric Sandeen return 1; 2708a13fb1a4SEric Sandeen } 2709a13fb1a4SEric Sandeen 271066e61a9eSTheodore Ts'o /* 271166e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 271266e61a9eSTheodore Ts'o * on the file system 271366e61a9eSTheodore Ts'o */ 271466e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 271566e61a9eSTheodore Ts'o { 271666e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 271766e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 271866e61a9eSTheodore Ts'o struct ext4_super_block *es; 271966e61a9eSTheodore Ts'o 272066e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 272166e61a9eSTheodore Ts'o es = sbi->s_es; 272266e61a9eSTheodore Ts'o 272366e61a9eSTheodore Ts'o if (es->s_error_count) 272466e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 272566e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 272666e61a9eSTheodore Ts'o if (es->s_first_error_time) { 272766e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 272866e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 272966e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 273066e61a9eSTheodore Ts'o es->s_first_error_func, 273166e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 273266e61a9eSTheodore Ts'o if (es->s_first_error_ino) 273366e61a9eSTheodore Ts'o printk(": inode %u", 273466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 273566e61a9eSTheodore Ts'o if (es->s_first_error_block) 273666e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 273766e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 273866e61a9eSTheodore Ts'o printk("\n"); 273966e61a9eSTheodore Ts'o } 274066e61a9eSTheodore Ts'o if (es->s_last_error_time) { 274166e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 274266e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 274366e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 274466e61a9eSTheodore Ts'o es->s_last_error_func, 274566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 274666e61a9eSTheodore Ts'o if (es->s_last_error_ino) 274766e61a9eSTheodore Ts'o printk(": inode %u", 274866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 274966e61a9eSTheodore Ts'o if (es->s_last_error_block) 275066e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 275166e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 275266e61a9eSTheodore Ts'o printk("\n"); 275366e61a9eSTheodore Ts'o } 275466e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 275566e61a9eSTheodore Ts'o } 275666e61a9eSTheodore Ts'o 2757bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2758bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2759bfff6873SLukas Czerner { 2760bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2761bfff6873SLukas Czerner ext4_group_t group, ngroups; 2762bfff6873SLukas Czerner struct super_block *sb; 2763bfff6873SLukas Czerner unsigned long timeout = 0; 2764bfff6873SLukas Czerner int ret = 0; 2765bfff6873SLukas Czerner 2766bfff6873SLukas Czerner sb = elr->lr_super; 2767bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2768bfff6873SLukas Czerner 27698e8ad8a5SJan Kara sb_start_write(sb); 2770bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2771bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2772bfff6873SLukas Czerner if (!gdp) { 2773bfff6873SLukas Czerner ret = 1; 2774bfff6873SLukas Czerner break; 2775bfff6873SLukas Czerner } 2776bfff6873SLukas Czerner 2777bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2778bfff6873SLukas Czerner break; 2779bfff6873SLukas Czerner } 2780bfff6873SLukas Czerner 27817f511862STheodore Ts'o if (group >= ngroups) 2782bfff6873SLukas Czerner ret = 1; 2783bfff6873SLukas Czerner 2784bfff6873SLukas Czerner if (!ret) { 2785bfff6873SLukas Czerner timeout = jiffies; 2786bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2787bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2788bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 278951ce6511SLukas Czerner timeout = (jiffies - timeout) * 279051ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2791bfff6873SLukas Czerner elr->lr_timeout = timeout; 2792bfff6873SLukas Czerner } 2793bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2794bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2795bfff6873SLukas Czerner } 27968e8ad8a5SJan Kara sb_end_write(sb); 2797bfff6873SLukas Czerner 2798bfff6873SLukas Czerner return ret; 2799bfff6873SLukas Czerner } 2800bfff6873SLukas Czerner 2801bfff6873SLukas Czerner /* 2802bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 28034ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2804bfff6873SLukas Czerner */ 2805bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2806bfff6873SLukas Czerner { 2807bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2808bfff6873SLukas Czerner 2809bfff6873SLukas Czerner if (!elr) 2810bfff6873SLukas Czerner return; 2811bfff6873SLukas Czerner 2812bfff6873SLukas Czerner sbi = elr->lr_sbi; 2813bfff6873SLukas Czerner 2814bfff6873SLukas Czerner list_del(&elr->lr_request); 2815bfff6873SLukas Czerner sbi->s_li_request = NULL; 2816bfff6873SLukas Czerner kfree(elr); 2817bfff6873SLukas Czerner } 2818bfff6873SLukas Czerner 2819bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2820bfff6873SLukas Czerner { 28211bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 28221bb933fbSLukas Czerner if (!ext4_li_info) { 28231bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2824bfff6873SLukas Czerner return; 28251bb933fbSLukas Czerner } 2826bfff6873SLukas Czerner 2827bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 28281bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2829bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 28301bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2831bfff6873SLukas Czerner } 2832bfff6873SLukas Czerner 28338f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 28348f1f7453SEric Sandeen 2835bfff6873SLukas Czerner /* 2836bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2837bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2838bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2839bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2840bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2841bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2842bfff6873SLukas Czerner * next waking time and put itself into sleep. 2843bfff6873SLukas Czerner */ 2844bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2845bfff6873SLukas Czerner { 2846bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2847bfff6873SLukas Czerner struct list_head *pos, *n; 2848bfff6873SLukas Czerner struct ext4_li_request *elr; 28494ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2850bfff6873SLukas Czerner 2851bfff6873SLukas Czerner BUG_ON(NULL == eli); 2852bfff6873SLukas Czerner 2853bfff6873SLukas Czerner cont_thread: 2854bfff6873SLukas Czerner while (true) { 2855bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2856bfff6873SLukas Czerner 2857bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2858bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2859bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2860bfff6873SLukas Czerner goto exit_thread; 2861bfff6873SLukas Czerner } 2862bfff6873SLukas Czerner 2863bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2864bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2865bfff6873SLukas Czerner lr_request); 2866bfff6873SLukas Czerner 2867b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2868b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2869b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2870bfff6873SLukas Czerner ext4_remove_li_request(elr); 2871bfff6873SLukas Czerner continue; 2872bfff6873SLukas Czerner } 2873b2c78cd0STheodore Ts'o } 2874bfff6873SLukas Czerner 2875bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2876bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2877bfff6873SLukas Czerner } 2878bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2879bfff6873SLukas Czerner 2880a0acae0eSTejun Heo try_to_freeze(); 2881bfff6873SLukas Czerner 28824ed5c033SLukas Czerner cur = jiffies; 28834ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2884f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2885bfff6873SLukas Czerner cond_resched(); 2886bfff6873SLukas Czerner continue; 2887bfff6873SLukas Czerner } 2888bfff6873SLukas Czerner 28894ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 28904ed5c033SLukas Czerner 28918f1f7453SEric Sandeen if (kthread_should_stop()) { 28928f1f7453SEric Sandeen ext4_clear_request_list(); 28938f1f7453SEric Sandeen goto exit_thread; 28948f1f7453SEric Sandeen } 2895bfff6873SLukas Czerner } 2896bfff6873SLukas Czerner 2897bfff6873SLukas Czerner exit_thread: 2898bfff6873SLukas Czerner /* 2899bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2900bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2901bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2902bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2903bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2904bfff6873SLukas Czerner * new one. 2905bfff6873SLukas Czerner */ 2906bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2907bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2908bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2909bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2910bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2911bfff6873SLukas Czerner goto cont_thread; 2912bfff6873SLukas Czerner } 2913bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2914bfff6873SLukas Czerner kfree(ext4_li_info); 2915bfff6873SLukas Czerner ext4_li_info = NULL; 2916bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2917bfff6873SLukas Czerner 2918bfff6873SLukas Czerner return 0; 2919bfff6873SLukas Czerner } 2920bfff6873SLukas Czerner 2921bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2922bfff6873SLukas Czerner { 2923bfff6873SLukas Czerner struct list_head *pos, *n; 2924bfff6873SLukas Czerner struct ext4_li_request *elr; 2925bfff6873SLukas Czerner 2926bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2927bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2928bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2929bfff6873SLukas Czerner lr_request); 2930bfff6873SLukas Czerner ext4_remove_li_request(elr); 2931bfff6873SLukas Czerner } 2932bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2933bfff6873SLukas Czerner } 2934bfff6873SLukas Czerner 2935bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2936bfff6873SLukas Czerner { 29378f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 29388f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 29398f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 29408f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2941bfff6873SLukas Czerner ext4_clear_request_list(); 2942bfff6873SLukas Czerner kfree(ext4_li_info); 2943bfff6873SLukas Czerner ext4_li_info = NULL; 294492b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2945bfff6873SLukas Czerner "initialization thread\n", 2946bfff6873SLukas Czerner err); 2947bfff6873SLukas Czerner return err; 2948bfff6873SLukas Czerner } 2949bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2950bfff6873SLukas Czerner return 0; 2951bfff6873SLukas Czerner } 2952bfff6873SLukas Czerner 2953bfff6873SLukas Czerner /* 2954bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2955bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2956bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2957bfff6873SLukas Czerner * groups and return total number of groups. 2958bfff6873SLukas Czerner */ 2959bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2960bfff6873SLukas Czerner { 2961bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2962bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2963bfff6873SLukas Czerner 2964bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2965bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2966bfff6873SLukas Czerner if (!gdp) 2967bfff6873SLukas Czerner continue; 2968bfff6873SLukas Czerner 2969bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2970bfff6873SLukas Czerner break; 2971bfff6873SLukas Czerner } 2972bfff6873SLukas Czerner 2973bfff6873SLukas Czerner return group; 2974bfff6873SLukas Czerner } 2975bfff6873SLukas Czerner 2976bfff6873SLukas Czerner static int ext4_li_info_new(void) 2977bfff6873SLukas Czerner { 2978bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2979bfff6873SLukas Czerner 2980bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2981bfff6873SLukas Czerner if (!eli) 2982bfff6873SLukas Czerner return -ENOMEM; 2983bfff6873SLukas Czerner 2984bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2985bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2986bfff6873SLukas Czerner 2987bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2988bfff6873SLukas Czerner 2989bfff6873SLukas Czerner ext4_li_info = eli; 2990bfff6873SLukas Czerner 2991bfff6873SLukas Czerner return 0; 2992bfff6873SLukas Czerner } 2993bfff6873SLukas Czerner 2994bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2995bfff6873SLukas Czerner ext4_group_t start) 2996bfff6873SLukas Czerner { 2997bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2998bfff6873SLukas Czerner struct ext4_li_request *elr; 2999bfff6873SLukas Czerner unsigned long rnd; 3000bfff6873SLukas Czerner 3001bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3002bfff6873SLukas Czerner if (!elr) 3003bfff6873SLukas Czerner return NULL; 3004bfff6873SLukas Czerner 3005bfff6873SLukas Czerner elr->lr_super = sb; 3006bfff6873SLukas Czerner elr->lr_sbi = sbi; 3007bfff6873SLukas Czerner elr->lr_next_group = start; 3008bfff6873SLukas Czerner 3009bfff6873SLukas Czerner /* 3010bfff6873SLukas Czerner * Randomize first schedule time of the request to 3011bfff6873SLukas Czerner * spread the inode table initialization requests 3012bfff6873SLukas Czerner * better. 3013bfff6873SLukas Czerner */ 3014bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 3015bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 3016bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 3017bfff6873SLukas Czerner 3018bfff6873SLukas Czerner return elr; 3019bfff6873SLukas Czerner } 3020bfff6873SLukas Czerner 30217f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3022bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3023bfff6873SLukas Czerner { 3024bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 30257f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3026bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 30276c5a6cb9SAndrew Morton int ret = 0; 3028bfff6873SLukas Czerner 30297f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 303051ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 303151ce6511SLukas Czerner /* 303251ce6511SLukas Czerner * Reset timeout so it can be computed again, because 303351ce6511SLukas Czerner * s_li_wait_mult might have changed. 303451ce6511SLukas Czerner */ 303551ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 30367f511862STheodore Ts'o goto out; 303751ce6511SLukas Czerner } 3038bfff6873SLukas Czerner 3039bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3040bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 304155ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 30427f511862STheodore Ts'o goto out; 3043bfff6873SLukas Czerner 3044bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 30457f511862STheodore Ts'o if (!elr) { 30467f511862STheodore Ts'o ret = -ENOMEM; 30477f511862STheodore Ts'o goto out; 30487f511862STheodore Ts'o } 3049bfff6873SLukas Czerner 3050bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3051bfff6873SLukas Czerner ret = ext4_li_info_new(); 3052bfff6873SLukas Czerner if (ret) 3053bfff6873SLukas Czerner goto out; 3054bfff6873SLukas Czerner } 3055bfff6873SLukas Czerner 3056bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3057bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3058bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3059bfff6873SLukas Czerner 3060bfff6873SLukas Czerner sbi->s_li_request = elr; 306146e4690bSTao Ma /* 306246e4690bSTao Ma * set elr to NULL here since it has been inserted to 306346e4690bSTao Ma * the request_list and the removal and free of it is 306446e4690bSTao Ma * handled by ext4_clear_request_list from now on. 306546e4690bSTao Ma */ 306646e4690bSTao Ma elr = NULL; 3067bfff6873SLukas Czerner 3068bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3069bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3070bfff6873SLukas Czerner if (ret) 3071bfff6873SLukas Czerner goto out; 3072bfff6873SLukas Czerner } 3073bfff6873SLukas Czerner out: 3074bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3075beed5ecbSNicolas Kaiser if (ret) 3076bfff6873SLukas Czerner kfree(elr); 3077bfff6873SLukas Czerner return ret; 3078bfff6873SLukas Czerner } 3079bfff6873SLukas Czerner 3080bfff6873SLukas Czerner /* 3081bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3082bfff6873SLukas Czerner * module unload. 3083bfff6873SLukas Czerner */ 3084bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3085bfff6873SLukas Czerner { 3086bfff6873SLukas Czerner /* 3087bfff6873SLukas Czerner * If thread exited earlier 3088bfff6873SLukas Czerner * there's nothing to be done. 3089bfff6873SLukas Czerner */ 30908f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3091bfff6873SLukas Czerner return; 3092bfff6873SLukas Czerner 30938f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3094bfff6873SLukas Czerner } 3095bfff6873SLukas Czerner 309625ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 309725ed6e8aSDarrick J. Wong { 309825ed6e8aSDarrick J. Wong int ret = 1; 309925ed6e8aSDarrick J. Wong int compat, incompat; 310025ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 310125ed6e8aSDarrick J. Wong 310225ed6e8aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 310325ed6e8aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 310425ed6e8aSDarrick J. Wong /* journal checksum v2 */ 310525ed6e8aSDarrick J. Wong compat = 0; 310625ed6e8aSDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V2; 310725ed6e8aSDarrick J. Wong } else { 310825ed6e8aSDarrick J. Wong /* journal checksum v1 */ 310925ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 311025ed6e8aSDarrick J. Wong incompat = 0; 311125ed6e8aSDarrick J. Wong } 311225ed6e8aSDarrick J. Wong 311325ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 311425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 311525ed6e8aSDarrick J. Wong compat, 0, 311625ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 311725ed6e8aSDarrick J. Wong incompat); 311825ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 311925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 312025ed6e8aSDarrick J. Wong compat, 0, 312125ed6e8aSDarrick J. Wong incompat); 312225ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 312325ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 312425ed6e8aSDarrick J. Wong } else { 312525ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 312625ed6e8aSDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 312725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 312825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 312925ed6e8aSDarrick J. Wong } 313025ed6e8aSDarrick J. Wong 313125ed6e8aSDarrick J. Wong return ret; 313225ed6e8aSDarrick J. Wong } 313325ed6e8aSDarrick J. Wong 3134952fc18eSTheodore Ts'o /* 3135952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3136952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3137952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3138952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3139952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3140952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3141952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3142952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3143952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3144952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3145952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3146952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3147952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3148952fc18eSTheodore Ts'o */ 3149952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3150952fc18eSTheodore Ts'o char *buf) 3151952fc18eSTheodore Ts'o { 3152952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3153952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3154952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3155952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3156952fc18eSTheodore Ts'o int s, j, count = 0; 3157952fc18eSTheodore Ts'o 31580548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 31590548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 31600548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 31610548bbb8STheodore Ts'o 3162952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3163952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3164952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3165952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3166952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3167952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3168952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3169952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3170952fc18eSTheodore Ts'o count++; 3171952fc18eSTheodore Ts'o } 3172952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3173952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3174952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3175952fc18eSTheodore Ts'o count++; 3176952fc18eSTheodore Ts'o } 3177952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3178952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3179952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3180952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3181952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3182952fc18eSTheodore Ts'o count++; 3183952fc18eSTheodore Ts'o } 3184952fc18eSTheodore Ts'o if (i != grp) 3185952fc18eSTheodore Ts'o continue; 3186952fc18eSTheodore Ts'o s = 0; 3187952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3188952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3189952fc18eSTheodore Ts'o count++; 3190952fc18eSTheodore Ts'o } 3191952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3192952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3193952fc18eSTheodore Ts'o count++; 3194952fc18eSTheodore Ts'o } 3195952fc18eSTheodore Ts'o } 3196952fc18eSTheodore Ts'o if (!count) 3197952fc18eSTheodore Ts'o return 0; 3198952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3199952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3200952fc18eSTheodore Ts'o } 3201952fc18eSTheodore Ts'o 3202952fc18eSTheodore Ts'o /* 3203952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3204952fc18eSTheodore Ts'o */ 3205952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3206952fc18eSTheodore Ts'o { 3207952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3208952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3209952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3210952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3211952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3212952fc18eSTheodore Ts'o 3213952fc18eSTheodore Ts'o if (!buf) 3214952fc18eSTheodore Ts'o return -ENOMEM; 3215952fc18eSTheodore Ts'o 3216952fc18eSTheodore Ts'o /* 3217952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3218952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3219952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3220952fc18eSTheodore Ts'o */ 3221952fc18eSTheodore Ts'o 3222952fc18eSTheodore Ts'o /* 3223952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3224952fc18eSTheodore Ts'o */ 3225952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3226952fc18eSTheodore Ts'o 3227952fc18eSTheodore Ts'o /* 3228952fc18eSTheodore Ts'o * Add the overhead found in each block group 3229952fc18eSTheodore Ts'o */ 3230952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3231952fc18eSTheodore Ts'o int blks; 3232952fc18eSTheodore Ts'o 3233952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3234952fc18eSTheodore Ts'o overhead += blks; 3235952fc18eSTheodore Ts'o if (blks) 3236952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3237952fc18eSTheodore Ts'o cond_resched(); 3238952fc18eSTheodore Ts'o } 32390875a2b4SEric Sandeen /* Add the journal blocks as well */ 32400875a2b4SEric Sandeen if (sbi->s_journal) 32410875a2b4SEric Sandeen overhead += EXT4_B2C(sbi, sbi->s_journal->j_maxlen); 32420875a2b4SEric Sandeen 3243952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3244952fc18eSTheodore Ts'o smp_wmb(); 3245952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3246952fc18eSTheodore Ts'o return 0; 3247952fc18eSTheodore Ts'o } 3248952fc18eSTheodore Ts'o 3249617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3250ac27a0ecSDave Kleikamp { 3251d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3252ac27a0ecSDave Kleikamp struct buffer_head *bh; 3253617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3254617ba13bSMingming Cao struct ext4_sb_info *sbi; 3255617ba13bSMingming Cao ext4_fsblk_t block; 3256617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 325770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3258ac27a0ecSDave Kleikamp unsigned long offset = 0; 3259ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3260ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3261ac27a0ecSDave Kleikamp struct inode *root; 32629f6200bbSTheodore Ts'o char *cp; 32630390131bSFrank Mayhar const char *descr; 3264dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3265281b5995STheodore Ts'o int blocksize, clustersize; 32664ec11028STheodore Ts'o unsigned int db_count; 32674ec11028STheodore Ts'o unsigned int i; 3268281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3269bd81d8eeSLaurent Vivier __u64 blocks_count; 327007aa2ea1SLukas Czerner int err = 0; 3271b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3272bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3273ac27a0ecSDave Kleikamp 3274ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3275ac27a0ecSDave Kleikamp if (!sbi) 3276dcc7dae3SCyrill Gorcunov goto out_free_orig; 3277705895b6SPekka Enberg 3278705895b6SPekka Enberg sbi->s_blockgroup_lock = 3279705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3280705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3281705895b6SPekka Enberg kfree(sbi); 3282dcc7dae3SCyrill Gorcunov goto out_free_orig; 3283705895b6SPekka Enberg } 3284ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 32852c0544b2STheodore Ts'o sbi->s_sb = sb; 3286240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3287d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3288f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3289f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3290f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3291ac27a0ecSDave Kleikamp 32929f6200bbSTheodore Ts'o /* Cleanup superblock name */ 32939f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 32949f6200bbSTheodore Ts'o *cp = '!'; 32959f6200bbSTheodore Ts'o 329607aa2ea1SLukas Czerner /* -EINVAL is default */ 3297dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3298617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3299ac27a0ecSDave Kleikamp if (!blocksize) { 3300b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3301ac27a0ecSDave Kleikamp goto out_fail; 3302ac27a0ecSDave Kleikamp } 3303ac27a0ecSDave Kleikamp 3304ac27a0ecSDave Kleikamp /* 3305617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3306ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3307ac27a0ecSDave Kleikamp */ 3308617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 330970bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 331070bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3311ac27a0ecSDave Kleikamp } else { 331270bbb3e0SAndrew Morton logical_sb_block = sb_block; 3313ac27a0ecSDave Kleikamp } 3314ac27a0ecSDave Kleikamp 331570bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3316b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3317ac27a0ecSDave Kleikamp goto out_fail; 3318ac27a0ecSDave Kleikamp } 3319ac27a0ecSDave Kleikamp /* 3320ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3321617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3322ac27a0ecSDave Kleikamp */ 33232716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3324ac27a0ecSDave Kleikamp sbi->s_es = es; 3325ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3326617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3327617ba13bSMingming Cao goto cantfind_ext4; 3328afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3329ac27a0ecSDave Kleikamp 3330feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3331feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3332feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3333feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3334feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3335feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3336feb0ab32SDarrick J. Wong 3337d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3338d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3339d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3340d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3341d25425f8SDarrick J. Wong silent = 1; 3342d25425f8SDarrick J. Wong goto cantfind_ext4; 3343d25425f8SDarrick J. Wong } 3344d25425f8SDarrick J. Wong 33450441984aSDarrick J. Wong /* Load the checksum driver */ 33460441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 33470441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 33480441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 33490441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 33500441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 33510441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 33520441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 33530441984aSDarrick J. Wong goto failed_mount; 33540441984aSDarrick J. Wong } 33550441984aSDarrick J. Wong } 33560441984aSDarrick J. Wong 3357a9c47317SDarrick J. Wong /* Check superblock checksum */ 3358a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3359a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3360a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3361a9c47317SDarrick J. Wong silent = 1; 3362a9c47317SDarrick J. Wong goto cantfind_ext4; 3363a9c47317SDarrick J. Wong } 3364a9c47317SDarrick J. Wong 3365a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3366a9c47317SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3367a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 3368a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3369a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3370a9c47317SDarrick J. Wong 3371ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3372ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3373fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3374617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3375fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 337687f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3377fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3378617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3379fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3380ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3381fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 338203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3383fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 33842e7842b8SHugh Dickins #endif 3385617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3386fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3387617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3388fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3389617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3390fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3391ac27a0ecSDave Kleikamp 3392617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3393fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3394bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3395fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3396bb4f397aSAneesh Kumar K.V else 3397fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 33988b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3399fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 34008b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3401fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3402ac27a0ecSDave Kleikamp 340308cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 340408cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 340530773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 340630773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 340730773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3408ac27a0ecSDave Kleikamp 34098b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3410fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3411ac27a0ecSDave Kleikamp 34121e2462f9SMingming Cao /* 3413dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3414dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3415dd919b98SAneesh Kumar K.V */ 3416bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 34178b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3418fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3419dd919b98SAneesh Kumar K.V 342051ce6511SLukas Czerner /* 342151ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 342251ce6511SLukas Czerner * no mount option specified. 342351ce6511SLukas Czerner */ 342451ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 342551ce6511SLukas Czerner 34268b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3427661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 34288b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 34298b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 34308b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 34318b67f04aSTheodore Ts'o } 34325a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3433b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3434661aa520SEric Sandeen &journal_ioprio, 0)) 3435ac27a0ecSDave Kleikamp goto failed_mount; 3436ac27a0ecSDave Kleikamp 343756889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 343856889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 343956889787STheodore Ts'o "with data=journal disables delayed " 344056889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 344156889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 344256889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 344356889787STheodore Ts'o "both data=journal and delalloc"); 344456889787STheodore Ts'o goto failed_mount; 344556889787STheodore Ts'o } 344656889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 344756889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 344856889787STheodore Ts'o "both data=journal and delalloc"); 344956889787STheodore Ts'o goto failed_mount; 345056889787STheodore Ts'o } 345156889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 345256889787STheodore Ts'o clear_opt(sb, DELALLOC); 345356889787STheodore Ts'o } 345456889787STheodore Ts'o 3455ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3456482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3457ac27a0ecSDave Kleikamp 3458617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3459617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3460617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3461617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3462b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3463b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3464b31e1552SEric Sandeen "running e2fsck is recommended"); 3465469108ffSTheodore Tso 34662035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 34672035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 34682035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 34692035e776STheodore Ts'o "using the ext4 subsystem"); 34702035e776STheodore Ts'o else { 34712035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 34722035e776STheodore Ts'o "to feature incompatibilities"); 34732035e776STheodore Ts'o goto failed_mount; 34742035e776STheodore Ts'o } 34752035e776STheodore Ts'o } 34762035e776STheodore Ts'o 34772035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 34782035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 34792035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 34802035e776STheodore Ts'o "using the ext4 subsystem"); 34812035e776STheodore Ts'o else { 34822035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 34832035e776STheodore Ts'o "to feature incompatibilities"); 34842035e776STheodore Ts'o goto failed_mount; 34852035e776STheodore Ts'o } 34862035e776STheodore Ts'o } 34872035e776STheodore Ts'o 3488469108ffSTheodore Tso /* 3489ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3490ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3491ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3492ac27a0ecSDave Kleikamp */ 3493a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3494ac27a0ecSDave Kleikamp goto failed_mount; 3495a13fb1a4SEric Sandeen 3496261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3497617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3498617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3499b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3500b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3501ac27a0ecSDave Kleikamp goto failed_mount; 3502ac27a0ecSDave Kleikamp } 3503ac27a0ecSDave Kleikamp 3504ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3505ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3506ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3507b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3508ce40733cSAneesh Kumar K.V blocksize); 3509ac27a0ecSDave Kleikamp goto failed_mount; 3510ac27a0ecSDave Kleikamp } 3511ac27a0ecSDave Kleikamp 3512ac27a0ecSDave Kleikamp brelse(bh); 351370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 351470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 351570bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3516ac27a0ecSDave Kleikamp if (!bh) { 3517b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3518b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3519ac27a0ecSDave Kleikamp goto failed_mount; 3520ac27a0ecSDave Kleikamp } 35212716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3522ac27a0ecSDave Kleikamp sbi->s_es = es; 3523617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3524b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3525b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3526ac27a0ecSDave Kleikamp goto failed_mount; 3527ac27a0ecSDave Kleikamp } 3528ac27a0ecSDave Kleikamp } 3529ac27a0ecSDave Kleikamp 3530a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3531a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3532f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3533f287a1a5STheodore Ts'o has_huge_files); 3534f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3535ac27a0ecSDave Kleikamp 3536617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3537617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3538617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3539ac27a0ecSDave Kleikamp } else { 3540ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3541ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3542617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 35431330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3544ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3545b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3546b31e1552SEric Sandeen "unsupported inode size: %d", 3547ac27a0ecSDave Kleikamp sbi->s_inode_size); 3548ac27a0ecSDave Kleikamp goto failed_mount; 3549ac27a0ecSDave Kleikamp } 3550ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3551ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3552ac27a0ecSDave Kleikamp } 35530b8e58a1SAndreas Dilger 35540d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 35550d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 35568fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 35570d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3558d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3559b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3560b31e1552SEric Sandeen "unsupported descriptor size %lu", 35610d1ee42fSAlexandre Ratchov sbi->s_desc_size); 35620d1ee42fSAlexandre Ratchov goto failed_mount; 35630d1ee42fSAlexandre Ratchov } 35640d1ee42fSAlexandre Ratchov } else 35650d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 35660b8e58a1SAndreas Dilger 3567ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3568ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3569b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3570617ba13bSMingming Cao goto cantfind_ext4; 35710b8e58a1SAndreas Dilger 3572617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3573ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3574617ba13bSMingming Cao goto cantfind_ext4; 3575ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3576ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 35770d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3578ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3579ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3580e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3581e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 35820b8e58a1SAndreas Dilger 3583ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3584ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3585ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3586f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3587f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3588f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3589f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3590f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3591f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3592f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3593f99b2589STheodore Ts'o #else 3594f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3595f99b2589STheodore Ts'o #endif 3596f99b2589STheodore Ts'o } 3597ac27a0ecSDave Kleikamp 3598281b5995STheodore Ts'o /* Handle clustersize */ 3599281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3600281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3601281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3602281b5995STheodore Ts'o if (has_bigalloc) { 3603281b5995STheodore Ts'o if (clustersize < blocksize) { 3604281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3605281b5995STheodore Ts'o "cluster size (%d) smaller than " 3606281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3607281b5995STheodore Ts'o goto failed_mount; 3608281b5995STheodore Ts'o } 3609281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3610281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3611281b5995STheodore Ts'o sbi->s_clusters_per_group = 3612281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3613281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3614281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3615281b5995STheodore Ts'o "#clusters per group too big: %lu", 3616281b5995STheodore Ts'o sbi->s_clusters_per_group); 3617281b5995STheodore Ts'o goto failed_mount; 3618281b5995STheodore Ts'o } 3619281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3620281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3621281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3622281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3623281b5995STheodore Ts'o sbi->s_blocks_per_group, 3624281b5995STheodore Ts'o sbi->s_clusters_per_group); 3625281b5995STheodore Ts'o goto failed_mount; 3626281b5995STheodore Ts'o } 3627281b5995STheodore Ts'o } else { 3628281b5995STheodore Ts'o if (clustersize != blocksize) { 3629281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3630281b5995STheodore Ts'o "block size (%d)", clustersize, 3631281b5995STheodore Ts'o blocksize); 3632281b5995STheodore Ts'o clustersize = blocksize; 3633281b5995STheodore Ts'o } 3634ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3635b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3636b31e1552SEric Sandeen "#blocks per group too big: %lu", 3637ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3638ac27a0ecSDave Kleikamp goto failed_mount; 3639ac27a0ecSDave Kleikamp } 3640281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3641281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3642281b5995STheodore Ts'o } 3643281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3644281b5995STheodore Ts'o 3645ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3646b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3647b31e1552SEric Sandeen "#inodes per group too big: %lu", 3648ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3649ac27a0ecSDave Kleikamp goto failed_mount; 3650ac27a0ecSDave Kleikamp } 3651ac27a0ecSDave Kleikamp 3652bf43d84bSEric Sandeen /* 3653bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3654bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3655bf43d84bSEric Sandeen */ 36565a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 365730ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 36585a9ae68aSDarrick J. Wong if (err) { 3659b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3660bf43d84bSEric Sandeen " too large to mount safely on this system"); 3661ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 366290c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3663ac27a0ecSDave Kleikamp goto failed_mount; 3664ac27a0ecSDave Kleikamp } 3665ac27a0ecSDave Kleikamp 3666617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3667617ba13bSMingming Cao goto cantfind_ext4; 3668e7c95593SEric Sandeen 36690f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 36700f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 36710f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3672b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3673b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 36740f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 36750f2ddca6SFrom: Thiemo Nagel goto failed_mount; 36760f2ddca6SFrom: Thiemo Nagel } 36770f2ddca6SFrom: Thiemo Nagel 36784ec11028STheodore Ts'o /* 36794ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 36804ec11028STheodore Ts'o * of the filesystem. 36814ec11028STheodore Ts'o */ 36824ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3683b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3684b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3685e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 36864ec11028STheodore Ts'o ext4_blocks_count(es)); 3687e7c95593SEric Sandeen goto failed_mount; 3688e7c95593SEric Sandeen } 3689bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3690bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3691bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3692bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 36934ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3694b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 36954ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3696b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 36974ec11028STheodore Ts'o ext4_blocks_count(es), 36984ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 36994ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 37004ec11028STheodore Ts'o goto failed_mount; 37014ec11028STheodore Ts'o } 3702bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3703fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3704fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3705617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3706617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3707f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3708f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3709ac27a0ecSDave Kleikamp GFP_KERNEL); 3710ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3711b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 37122cde417dSTheodore Ts'o ret = -ENOMEM; 3713ac27a0ecSDave Kleikamp goto failed_mount; 3714ac27a0ecSDave Kleikamp } 3715ac27a0ecSDave Kleikamp 37169f6200bbSTheodore Ts'o if (ext4_proc_root) 37179f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3718240799cdSTheodore Ts'o 371966acdcf4STheodore Ts'o if (sbi->s_proc) 372066acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 372166acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 372266acdcf4STheodore Ts'o 3723705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3724ac27a0ecSDave Kleikamp 3725ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 372670bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3727ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3728ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3729b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3730b31e1552SEric Sandeen "can't read group descriptor %d", i); 3731ac27a0ecSDave Kleikamp db_count = i; 3732ac27a0ecSDave Kleikamp goto failed_mount2; 3733ac27a0ecSDave Kleikamp } 3734ac27a0ecSDave Kleikamp } 3735bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3736b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3737ac27a0ecSDave Kleikamp goto failed_mount2; 3738ac27a0ecSDave Kleikamp } 3739772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3740772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3741b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3742b31e1552SEric Sandeen "unable to initialize " 3743b31e1552SEric Sandeen "flex_bg meta info!"); 3744772cb7c8SJose R. Santos goto failed_mount2; 3745772cb7c8SJose R. Santos } 3746772cb7c8SJose R. Santos 3747ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3748ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3749ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3750ac27a0ecSDave Kleikamp 375104496411STao Ma init_timer(&sbi->s_err_report); 375204496411STao Ma sbi->s_err_report.function = print_daily_error_info; 375304496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 375404496411STao Ma 375557042651STheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, 37565dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3757ce7e010aSTheodore Ts'o if (!err) { 3758ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3759ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3760ce7e010aSTheodore Ts'o } 3761ce7e010aSTheodore Ts'o if (!err) { 3762ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3763ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3764ce7e010aSTheodore Ts'o } 3765ce7e010aSTheodore Ts'o if (!err) { 376657042651STheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 3767ce7e010aSTheodore Ts'o } 3768ce7e010aSTheodore Ts'o if (err) { 3769ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3770ce7e010aSTheodore Ts'o goto failed_mount3; 3771ce7e010aSTheodore Ts'o } 3772ce7e010aSTheodore Ts'o 3773c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 377455138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 377567a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3776c9de560dSAlex Tomas 3777ac27a0ecSDave Kleikamp /* 3778ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3779ac27a0ecSDave Kleikamp */ 37809ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 37819ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3782617ba13bSMingming Cao sb->s_op = &ext4_sops; 37839ca92389STheodore Ts'o else 37849ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3785617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3786617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3787ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3788617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3789617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 37907c319d32SAditya Kali 37917c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 37927c319d32SAditya Kali /* Use qctl operations for hidden quota files. */ 37937c319d32SAditya Kali sb->s_qcop = &ext4_qctl_sysfile_operations; 37947c319d32SAditya Kali } 3795ac27a0ecSDave Kleikamp #endif 3796f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3797f2fa2ffcSAneesh Kumar K.V 3798ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 37993b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3800ac27a0ecSDave Kleikamp 3801ac27a0ecSDave Kleikamp sb->s_root = NULL; 3802ac27a0ecSDave Kleikamp 3803ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3804617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3805617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3806ac27a0ecSDave Kleikamp 3807c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3808c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3809c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3810c5e06d10SJohann Lombardi goto failed_mount3; 3811c5e06d10SJohann Lombardi 3812ac27a0ecSDave Kleikamp /* 3813ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3814ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3815ac27a0ecSDave Kleikamp */ 3816ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3817617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3818617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3819ac27a0ecSDave Kleikamp goto failed_mount3; 38200390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 38210390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3822b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3823b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3824744692dcSJiaying Zhang goto failed_mount_wq; 3825ac27a0ecSDave Kleikamp } else { 3826fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 38270390131bSFrank Mayhar sbi->s_journal = NULL; 38280390131bSFrank Mayhar needs_recovery = 0; 38290390131bSFrank Mayhar goto no_journal; 3830ac27a0ecSDave Kleikamp } 3831ac27a0ecSDave Kleikamp 3832f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3833eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3834eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3835b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3836744692dcSJiaying Zhang goto failed_mount_wq; 3837eb40a09cSJose R. Santos } 3838eb40a09cSJose R. Santos 383925ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 384025ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 384125ed6e8aSDarrick J. Wong "feature set"); 384225ed6e8aSDarrick J. Wong goto failed_mount_wq; 3843d4da6c9cSLinus Torvalds } 3844818d276cSGirish Shilamkar 3845ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3846ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3847ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3848ac27a0ecSDave Kleikamp case 0: 3849ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 385063f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 385163f57933SAndrew Morton * cope, else JOURNAL_DATA 385263f57933SAndrew Morton */ 3853dab291afSMingming Cao if (jbd2_journal_check_available_features 3854dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3855fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3856ac27a0ecSDave Kleikamp else 3857fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3858ac27a0ecSDave Kleikamp break; 3859ac27a0ecSDave Kleikamp 3860617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3861617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3862dab291afSMingming Cao if (!jbd2_journal_check_available_features 3863dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3864b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3865b31e1552SEric Sandeen "requested data journaling mode"); 3866744692dcSJiaying Zhang goto failed_mount_wq; 3867ac27a0ecSDave Kleikamp } 3868ac27a0ecSDave Kleikamp default: 3869ac27a0ecSDave Kleikamp break; 3870ac27a0ecSDave Kleikamp } 3871b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3872ac27a0ecSDave Kleikamp 387318aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 387418aadd47SBobi Jam 3875ce7e010aSTheodore Ts'o /* 3876ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3877ce7e010aSTheodore Ts'o * need to update the global counters. 3878ce7e010aSTheodore Ts'o */ 387957042651STheodore Ts'o percpu_counter_set(&sbi->s_freeclusters_counter, 38805dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3881ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 388284061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3883ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 388484061e07SDmitry Monakhov ext4_count_dirs(sb)); 388557042651STheodore Ts'o percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); 3886206f7ab4SChristoph Hellwig 3887ce7e010aSTheodore Ts'o no_journal: 3888fd89d5f2STejun Heo /* 3889952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 3890952fc18eSTheodore Ts'o * superblock if present. 3891952fc18eSTheodore Ts'o */ 3892952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 3893952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 3894952fc18eSTheodore Ts'o else { 389507aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 389607aa2ea1SLukas Czerner if (err) 3897952fc18eSTheodore Ts'o goto failed_mount_wq; 3898952fc18eSTheodore Ts'o } 3899952fc18eSTheodore Ts'o 3900952fc18eSTheodore Ts'o /* 3901fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3902fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3903fd89d5f2STejun Heo */ 3904fd89d5f2STejun Heo EXT4_SB(sb)->dio_unwritten_wq = 3905ae005cbeSLinus Torvalds alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 39064c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 39074c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 390807aa2ea1SLukas Czerner ret = -ENOMEM; 39094c0425ffSMingming Cao goto failed_mount_wq; 39104c0425ffSMingming Cao } 39114c0425ffSMingming Cao 3912ac27a0ecSDave Kleikamp /* 3913dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3914ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3915ac27a0ecSDave Kleikamp */ 3916ac27a0ecSDave Kleikamp 39171d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 39181d1fe1eeSDavid Howells if (IS_ERR(root)) { 3919b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 39201d1fe1eeSDavid Howells ret = PTR_ERR(root); 392132a9bb57SManish Katiyar root = NULL; 3922ac27a0ecSDave Kleikamp goto failed_mount4; 3923ac27a0ecSDave Kleikamp } 3924ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3925b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 392694bf608aSAl Viro iput(root); 3927ac27a0ecSDave Kleikamp goto failed_mount4; 3928ac27a0ecSDave Kleikamp } 392948fde701SAl Viro sb->s_root = d_make_root(root); 39301d1fe1eeSDavid Howells if (!sb->s_root) { 3931b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 39321d1fe1eeSDavid Howells ret = -ENOMEM; 39331d1fe1eeSDavid Howells goto failed_mount4; 39341d1fe1eeSDavid Howells } 3935ac27a0ecSDave Kleikamp 39367e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 39377e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 3938ef7f3835SKalpak Shah 3939ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3940ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3941ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3942ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3943ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3944ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3945ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3946ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3947ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3948ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3949ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3950ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3951ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3952ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3953ef7f3835SKalpak Shah } 3954ef7f3835SKalpak Shah } 3955ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3956ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3957ef7f3835SKalpak Shah sbi->s_inode_size) { 3958ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3959ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3960b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3961b31e1552SEric Sandeen "available"); 3962ef7f3835SKalpak Shah } 3963ef7f3835SKalpak Shah 39646fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 39656fd058f7STheodore Ts'o if (err) { 3966b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3967fbe845ddSCurt Wohlgemuth "zone (%d)", err); 396894bf608aSAl Viro goto failed_mount4a; 39696fd058f7STheodore Ts'o } 39706fd058f7STheodore Ts'o 3971c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 39729d99012fSAkira Fujita err = ext4_mb_init(sb); 3973c2774d84SAneesh Kumar K.V if (err) { 3974421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3975c2774d84SAneesh Kumar K.V err); 3976dcf2d804STao Ma goto failed_mount5; 3977c2774d84SAneesh Kumar K.V } 3978c2774d84SAneesh Kumar K.V 3979bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3980bfff6873SLukas Czerner if (err) 3981dcf2d804STao Ma goto failed_mount6; 3982bfff6873SLukas Czerner 39833197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 39843197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 39853197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 39863197ebdbSTheodore Ts'o "%s", sb->s_id); 3987dcf2d804STao Ma if (err) 3988dcf2d804STao Ma goto failed_mount7; 39893197ebdbSTheodore Ts'o 3990617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3991617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3992617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 39930390131bSFrank Mayhar if (needs_recovery) { 3994b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3995617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 39960390131bSFrank Mayhar } 39970390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 39980390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 39990390131bSFrank Mayhar descr = " journalled data mode"; 40000390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 40010390131bSFrank Mayhar descr = " ordered data mode"; 40020390131bSFrank Mayhar else 40030390131bSFrank Mayhar descr = " writeback data mode"; 40040390131bSFrank Mayhar } else 40050390131bSFrank Mayhar descr = "out journal"; 40060390131bSFrank Mayhar 40077c319d32SAditya Kali #ifdef CONFIG_QUOTA 40087c319d32SAditya Kali /* Enable quota usage during mount. */ 40097c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 40107c319d32SAditya Kali !(sb->s_flags & MS_RDONLY)) { 401107aa2ea1SLukas Czerner err = ext4_enable_quotas(sb); 401207aa2ea1SLukas Czerner if (err) 401372ba7450STheodore Ts'o goto failed_mount8; 40147c319d32SAditya Kali } 40157c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 40167c319d32SAditya Kali 401779add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 401879add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 401979add3a3SLukas Czerner if (!blk_queue_discard(q)) 402079add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 402179add3a3SLukas Czerner "mounting with \"discard\" option, but " 402279add3a3SLukas Czerner "the device does not support discard"); 402379add3a3SLukas Czerner } 402479add3a3SLukas Czerner 4025d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 40268b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 40278b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4028ac27a0ecSDave Kleikamp 402966e61a9eSTheodore Ts'o if (es->s_error_count) 403066e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4031ac27a0ecSDave Kleikamp 4032d4c402d9SCurt Wohlgemuth kfree(orig_data); 4033ac27a0ecSDave Kleikamp return 0; 4034ac27a0ecSDave Kleikamp 4035617ba13bSMingming Cao cantfind_ext4: 4036ac27a0ecSDave Kleikamp if (!silent) 4037b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4038ac27a0ecSDave Kleikamp goto failed_mount; 4039ac27a0ecSDave Kleikamp 404072ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 404172ba7450STheodore Ts'o failed_mount8: 404272ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 404372ba7450STheodore Ts'o #endif 4044dcf2d804STao Ma failed_mount7: 4045dcf2d804STao Ma ext4_unregister_li_request(sb); 4046dcf2d804STao Ma failed_mount6: 4047dcf2d804STao Ma ext4_mb_release(sb); 404894bf608aSAl Viro failed_mount5: 404994bf608aSAl Viro ext4_ext_release(sb); 4050dcf2d804STao Ma ext4_release_system_zone(sb); 405194bf608aSAl Viro failed_mount4a: 405294bf608aSAl Viro dput(sb->s_root); 405332a9bb57SManish Katiyar sb->s_root = NULL; 405494bf608aSAl Viro failed_mount4: 4055b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 40564c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 40574c0425ffSMingming Cao failed_mount_wq: 40580390131bSFrank Mayhar if (sbi->s_journal) { 4059dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 406047b4a50bSJan Kara sbi->s_journal = NULL; 40610390131bSFrank Mayhar } 4062ac27a0ecSDave Kleikamp failed_mount3: 406304496411STao Ma del_timer(&sbi->s_err_report); 40649933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 40659933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 406657042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4067ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4068ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 406957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 4070c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4071c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4072ac27a0ecSDave Kleikamp failed_mount2: 4073ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4074ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4075f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4076ac27a0ecSDave Kleikamp failed_mount: 40770441984aSDarrick J. Wong if (sbi->s_chksum_driver) 40780441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4079240799cdSTheodore Ts'o if (sbi->s_proc) { 408066acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 40819f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4082240799cdSTheodore Ts'o } 4083ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4084ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4085ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4086ac27a0ecSDave Kleikamp #endif 4087617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4088ac27a0ecSDave Kleikamp brelse(bh); 4089ac27a0ecSDave Kleikamp out_fail: 4090ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4091f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4092ac27a0ecSDave Kleikamp kfree(sbi); 4093dcc7dae3SCyrill Gorcunov out_free_orig: 4094d4c402d9SCurt Wohlgemuth kfree(orig_data); 409507aa2ea1SLukas Czerner return err ? err : ret; 4096ac27a0ecSDave Kleikamp } 4097ac27a0ecSDave Kleikamp 4098ac27a0ecSDave Kleikamp /* 4099ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4100ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4101ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4102ac27a0ecSDave Kleikamp */ 4103617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4104ac27a0ecSDave Kleikamp { 4105617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4106ac27a0ecSDave Kleikamp 4107ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 410830773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 410930773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4110ac27a0ecSDave Kleikamp 4111a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4112ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4113dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4114ac27a0ecSDave Kleikamp else 4115dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 41165bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 41175bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 41185bf5683aSHidehiro Kawai else 41195bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4120a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4121ac27a0ecSDave Kleikamp } 4122ac27a0ecSDave Kleikamp 4123617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4124ac27a0ecSDave Kleikamp unsigned int journal_inum) 4125ac27a0ecSDave Kleikamp { 4126ac27a0ecSDave Kleikamp struct inode *journal_inode; 4127ac27a0ecSDave Kleikamp journal_t *journal; 4128ac27a0ecSDave Kleikamp 41290390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41300390131bSFrank Mayhar 4131ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4132ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4133ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4134ac27a0ecSDave Kleikamp 41351d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 41361d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4137b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4138ac27a0ecSDave Kleikamp return NULL; 4139ac27a0ecSDave Kleikamp } 4140ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4141ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4142ac27a0ecSDave Kleikamp iput(journal_inode); 4143b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4144ac27a0ecSDave Kleikamp return NULL; 4145ac27a0ecSDave Kleikamp } 4146ac27a0ecSDave Kleikamp 4147e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4148ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 41491d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4150b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4151ac27a0ecSDave Kleikamp iput(journal_inode); 4152ac27a0ecSDave Kleikamp return NULL; 4153ac27a0ecSDave Kleikamp } 4154ac27a0ecSDave Kleikamp 4155dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4156ac27a0ecSDave Kleikamp if (!journal) { 4157b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4158ac27a0ecSDave Kleikamp iput(journal_inode); 4159ac27a0ecSDave Kleikamp return NULL; 4160ac27a0ecSDave Kleikamp } 4161ac27a0ecSDave Kleikamp journal->j_private = sb; 4162617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4163ac27a0ecSDave Kleikamp return journal; 4164ac27a0ecSDave Kleikamp } 4165ac27a0ecSDave Kleikamp 4166617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4167ac27a0ecSDave Kleikamp dev_t j_dev) 4168ac27a0ecSDave Kleikamp { 4169ac27a0ecSDave Kleikamp struct buffer_head *bh; 4170ac27a0ecSDave Kleikamp journal_t *journal; 4171617ba13bSMingming Cao ext4_fsblk_t start; 4172617ba13bSMingming Cao ext4_fsblk_t len; 4173ac27a0ecSDave Kleikamp int hblock, blocksize; 4174617ba13bSMingming Cao ext4_fsblk_t sb_block; 4175ac27a0ecSDave Kleikamp unsigned long offset; 4176617ba13bSMingming Cao struct ext4_super_block *es; 4177ac27a0ecSDave Kleikamp struct block_device *bdev; 4178ac27a0ecSDave Kleikamp 41790390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41800390131bSFrank Mayhar 4181b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4182ac27a0ecSDave Kleikamp if (bdev == NULL) 4183ac27a0ecSDave Kleikamp return NULL; 4184ac27a0ecSDave Kleikamp 4185ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4186e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4187ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4188b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4189b31e1552SEric Sandeen "blocksize too small for journal device"); 4190ac27a0ecSDave Kleikamp goto out_bdev; 4191ac27a0ecSDave Kleikamp } 4192ac27a0ecSDave Kleikamp 4193617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4194617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4195ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4196ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4197b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4198b31e1552SEric Sandeen "external journal"); 4199ac27a0ecSDave Kleikamp goto out_bdev; 4200ac27a0ecSDave Kleikamp } 4201ac27a0ecSDave Kleikamp 42022716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4203617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4204ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4205617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4206b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4207b31e1552SEric Sandeen "bad superblock"); 4208ac27a0ecSDave Kleikamp brelse(bh); 4209ac27a0ecSDave Kleikamp goto out_bdev; 4210ac27a0ecSDave Kleikamp } 4211ac27a0ecSDave Kleikamp 4212617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4213b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4214ac27a0ecSDave Kleikamp brelse(bh); 4215ac27a0ecSDave Kleikamp goto out_bdev; 4216ac27a0ecSDave Kleikamp } 4217ac27a0ecSDave Kleikamp 4218bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4219ac27a0ecSDave Kleikamp start = sb_block + 1; 4220ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4221ac27a0ecSDave Kleikamp 4222dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4223ac27a0ecSDave Kleikamp start, len, blocksize); 4224ac27a0ecSDave Kleikamp if (!journal) { 4225b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4226ac27a0ecSDave Kleikamp goto out_bdev; 4227ac27a0ecSDave Kleikamp } 4228ac27a0ecSDave Kleikamp journal->j_private = sb; 4229ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 4230ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4231ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4232b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4233ac27a0ecSDave Kleikamp goto out_journal; 4234ac27a0ecSDave Kleikamp } 4235ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4236b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4237b31e1552SEric Sandeen "user (unsupported) - %d", 4238ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4239ac27a0ecSDave Kleikamp goto out_journal; 4240ac27a0ecSDave Kleikamp } 4241617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4242617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4243ac27a0ecSDave Kleikamp return journal; 42440b8e58a1SAndreas Dilger 4245ac27a0ecSDave Kleikamp out_journal: 4246dab291afSMingming Cao jbd2_journal_destroy(journal); 4247ac27a0ecSDave Kleikamp out_bdev: 4248617ba13bSMingming Cao ext4_blkdev_put(bdev); 4249ac27a0ecSDave Kleikamp return NULL; 4250ac27a0ecSDave Kleikamp } 4251ac27a0ecSDave Kleikamp 4252617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4253617ba13bSMingming Cao struct ext4_super_block *es, 4254ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4255ac27a0ecSDave Kleikamp { 4256ac27a0ecSDave Kleikamp journal_t *journal; 4257ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4258ac27a0ecSDave Kleikamp dev_t journal_dev; 4259ac27a0ecSDave Kleikamp int err = 0; 4260ac27a0ecSDave Kleikamp int really_read_only; 4261ac27a0ecSDave Kleikamp 42620390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 42630390131bSFrank Mayhar 4264ac27a0ecSDave Kleikamp if (journal_devnum && 4265ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4266b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4267b31e1552SEric Sandeen "numbers have changed"); 4268ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4269ac27a0ecSDave Kleikamp } else 4270ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4271ac27a0ecSDave Kleikamp 4272ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4273ac27a0ecSDave Kleikamp 4274ac27a0ecSDave Kleikamp /* 4275ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4276ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4277ac27a0ecSDave Kleikamp * can get read-write access to the device. 4278ac27a0ecSDave Kleikamp */ 4279617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4280ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4281b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4282b31e1552SEric Sandeen "required on readonly filesystem"); 4283ac27a0ecSDave Kleikamp if (really_read_only) { 4284b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4285b31e1552SEric Sandeen "unavailable, cannot proceed"); 4286ac27a0ecSDave Kleikamp return -EROFS; 4287ac27a0ecSDave Kleikamp } 4288b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4289b31e1552SEric Sandeen "be enabled during recovery"); 4290ac27a0ecSDave Kleikamp } 4291ac27a0ecSDave Kleikamp } 4292ac27a0ecSDave Kleikamp 4293ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4294b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4295b31e1552SEric Sandeen "and inode journals!"); 4296ac27a0ecSDave Kleikamp return -EINVAL; 4297ac27a0ecSDave Kleikamp } 4298ac27a0ecSDave Kleikamp 4299ac27a0ecSDave Kleikamp if (journal_inum) { 4300617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4301ac27a0ecSDave Kleikamp return -EINVAL; 4302ac27a0ecSDave Kleikamp } else { 4303617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4304ac27a0ecSDave Kleikamp return -EINVAL; 4305ac27a0ecSDave Kleikamp } 4306ac27a0ecSDave Kleikamp 430790576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4308b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 43094776004fSTheodore Ts'o 4310617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4311dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 43121c13d5c0STheodore Ts'o if (!err) { 43131c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 43141c13d5c0STheodore Ts'o if (save) 43151c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 43161c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4317dab291afSMingming Cao err = jbd2_journal_load(journal); 43181c13d5c0STheodore Ts'o if (save) 43191c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 43201c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 43211c13d5c0STheodore Ts'o kfree(save); 43221c13d5c0STheodore Ts'o } 4323ac27a0ecSDave Kleikamp 4324ac27a0ecSDave Kleikamp if (err) { 4325b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4326dab291afSMingming Cao jbd2_journal_destroy(journal); 4327ac27a0ecSDave Kleikamp return err; 4328ac27a0ecSDave Kleikamp } 4329ac27a0ecSDave Kleikamp 4330617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4331617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4332ac27a0ecSDave Kleikamp 4333c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4334ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4335ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4336ac27a0ecSDave Kleikamp 4337ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4338e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4339ac27a0ecSDave Kleikamp } 4340ac27a0ecSDave Kleikamp 4341ac27a0ecSDave Kleikamp return 0; 4342ac27a0ecSDave Kleikamp } 4343ac27a0ecSDave Kleikamp 4344e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4345ac27a0ecSDave Kleikamp { 4346e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4347617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4348c4be0c1dSTakashi Sato int error = 0; 4349ac27a0ecSDave Kleikamp 43507c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4351c4be0c1dSTakashi Sato return error; 4352914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4353914258bfSTheodore Ts'o /* 4354914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4355914258bfSTheodore Ts'o * superblock failed. This could happen because the 4356914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4357914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4358914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4359914258bfSTheodore Ts'o * write and hope for the best. 4360914258bfSTheodore Ts'o */ 4361b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4362b31e1552SEric Sandeen "superblock detected"); 4363914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4364914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4365914258bfSTheodore Ts'o } 436671290b36STheodore Ts'o /* 436771290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 436871290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 436971290b36STheodore Ts'o * write time when we are mounting the root file system 437071290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 437171290b36STheodore Ts'o * for people who are east of GMT and who make their clock 437271290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 437371290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 437471290b36STheodore Ts'o * to complain and force a full file system check. 437571290b36STheodore Ts'o */ 437671290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4377ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4378f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4379afc32f7eSTheodore Ts'o es->s_kbytes_written = 4380afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4381afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4382afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4383f613dfcbSTheodore Ts'o else 4384f613dfcbSTheodore Ts'o es->s_kbytes_written = 4385f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 438657042651STheodore Ts'o ext4_free_blocks_count_set(es, 438757042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 438857042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 43897f93cff9STheodore Ts'o es->s_free_inodes_count = 43907f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 43915d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4392ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 439306db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4394ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4395914258bfSTheodore Ts'o if (sync) { 4396c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4397c4be0c1dSTakashi Sato if (error) 4398c4be0c1dSTakashi Sato return error; 4399c4be0c1dSTakashi Sato 4400c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4401c4be0c1dSTakashi Sato if (error) { 4402b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4403b31e1552SEric Sandeen "superblock"); 4404914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4405914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4406914258bfSTheodore Ts'o } 4407914258bfSTheodore Ts'o } 4408c4be0c1dSTakashi Sato return error; 4409ac27a0ecSDave Kleikamp } 4410ac27a0ecSDave Kleikamp 4411ac27a0ecSDave Kleikamp /* 4412ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4413ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4414ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4415ac27a0ecSDave Kleikamp */ 4416617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4417617ba13bSMingming Cao struct ext4_super_block *es) 4418ac27a0ecSDave Kleikamp { 4419617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4420ac27a0ecSDave Kleikamp 44210390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 44220390131bSFrank Mayhar BUG_ON(journal != NULL); 44230390131bSFrank Mayhar return; 44240390131bSFrank Mayhar } 4425dab291afSMingming Cao jbd2_journal_lock_updates(journal); 44267ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 44277ffe1ea8SHidehiro Kawai goto out; 44287ffe1ea8SHidehiro Kawai 4429617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4430ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4431617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4432e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4433ac27a0ecSDave Kleikamp } 44347ffe1ea8SHidehiro Kawai 44357ffe1ea8SHidehiro Kawai out: 4436dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4437ac27a0ecSDave Kleikamp } 4438ac27a0ecSDave Kleikamp 4439ac27a0ecSDave Kleikamp /* 4440ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4441ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4442ac27a0ecSDave Kleikamp * main filesystem now. 4443ac27a0ecSDave Kleikamp */ 4444617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4445617ba13bSMingming Cao struct ext4_super_block *es) 4446ac27a0ecSDave Kleikamp { 4447ac27a0ecSDave Kleikamp journal_t *journal; 4448ac27a0ecSDave Kleikamp int j_errno; 4449ac27a0ecSDave Kleikamp const char *errstr; 4450ac27a0ecSDave Kleikamp 44510390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44520390131bSFrank Mayhar 4453617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4454ac27a0ecSDave Kleikamp 4455ac27a0ecSDave Kleikamp /* 4456ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4457617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4458ac27a0ecSDave Kleikamp */ 4459ac27a0ecSDave Kleikamp 4460dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4461ac27a0ecSDave Kleikamp if (j_errno) { 4462ac27a0ecSDave Kleikamp char nbuf[16]; 4463ac27a0ecSDave Kleikamp 4464617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 446512062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4466ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 446712062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4468ac27a0ecSDave Kleikamp 4469617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4470617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4471e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4472ac27a0ecSDave Kleikamp 4473dab291afSMingming Cao jbd2_journal_clear_err(journal); 4474d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4475ac27a0ecSDave Kleikamp } 4476ac27a0ecSDave Kleikamp } 4477ac27a0ecSDave Kleikamp 4478ac27a0ecSDave Kleikamp /* 4479ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4480ac27a0ecSDave Kleikamp * and wait on the commit. 4481ac27a0ecSDave Kleikamp */ 4482617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4483ac27a0ecSDave Kleikamp { 4484ac27a0ecSDave Kleikamp journal_t *journal; 4485ac27a0ecSDave Kleikamp 4486ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4487ac27a0ecSDave Kleikamp return 0; 4488ac27a0ecSDave Kleikamp 4489617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4490b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4491ac27a0ecSDave Kleikamp } 4492ac27a0ecSDave Kleikamp 4493617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4494ac27a0ecSDave Kleikamp { 449514ce0cb4STheodore Ts'o int ret = 0; 44969eddacf9SJan Kara tid_t target; 44978d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4498ac27a0ecSDave Kleikamp 44999bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 45008d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 4501a1177825SJan Kara /* 4502a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4503a1177825SJan Kara * no dirty dquots 4504a1177825SJan Kara */ 4505a1177825SJan Kara dquot_writeback_dquots(sb, -1); 45068d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4507ac27a0ecSDave Kleikamp if (wait) 45088d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 45090390131bSFrank Mayhar } 451014ce0cb4STheodore Ts'o return ret; 4511ac27a0ecSDave Kleikamp } 4512ac27a0ecSDave Kleikamp 4513ac27a0ecSDave Kleikamp /* 4514ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4515ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4516be4f27d3SYongqiang Yang * 4517be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 45188e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 45198e8ad8a5SJan Kara * modifications. 4520ac27a0ecSDave Kleikamp */ 4521c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4522ac27a0ecSDave Kleikamp { 4523c4be0c1dSTakashi Sato int error = 0; 4524c4be0c1dSTakashi Sato journal_t *journal; 4525ac27a0ecSDave Kleikamp 45269ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 45279ca92389STheodore Ts'o return 0; 45289ca92389STheodore Ts'o 4529c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4530ac27a0ecSDave Kleikamp 4531ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4532dab291afSMingming Cao jbd2_journal_lock_updates(journal); 45337ffe1ea8SHidehiro Kawai 45347ffe1ea8SHidehiro Kawai /* 45359ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 45369ca92389STheodore Ts'o * the journal. 45377ffe1ea8SHidehiro Kawai */ 4538c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 45396b0310fbSEric Sandeen if (error < 0) 45406b0310fbSEric Sandeen goto out; 4541ac27a0ecSDave Kleikamp 4542ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4543617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4544e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 45456b0310fbSEric Sandeen out: 45468e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 45476b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 45486b0310fbSEric Sandeen return error; 4549ac27a0ecSDave Kleikamp } 4550ac27a0ecSDave Kleikamp 4551ac27a0ecSDave Kleikamp /* 4552ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4553ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4554ac27a0ecSDave Kleikamp */ 4555c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4556ac27a0ecSDave Kleikamp { 45579ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 45589ca92389STheodore Ts'o return 0; 45599ca92389STheodore Ts'o 45609ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4561617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4562e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4563c4be0c1dSTakashi Sato return 0; 4564ac27a0ecSDave Kleikamp } 4565ac27a0ecSDave Kleikamp 4566673c6100STheodore Ts'o /* 4567673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4568673c6100STheodore Ts'o */ 4569673c6100STheodore Ts'o struct ext4_mount_options { 4570673c6100STheodore Ts'o unsigned long s_mount_opt; 4571a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 457208cefc7aSEric W. Biederman kuid_t s_resuid; 457308cefc7aSEric W. Biederman kgid_t s_resgid; 4574673c6100STheodore Ts'o unsigned long s_commit_interval; 4575673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4576673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4577673c6100STheodore Ts'o int s_jquota_fmt; 4578673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4579673c6100STheodore Ts'o #endif 4580673c6100STheodore Ts'o }; 4581673c6100STheodore Ts'o 4582617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4583ac27a0ecSDave Kleikamp { 4584617ba13bSMingming Cao struct ext4_super_block *es; 4585617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4586ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4587617ba13bSMingming Cao struct ext4_mount_options old_opts; 4588c79d967dSChristoph Hellwig int enable_quota = 0; 45898a266467STheodore Ts'o ext4_group_t g; 4590b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4591c5e06d10SJohann Lombardi int err = 0; 4592ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 459303dafb5fSChen Gang int i, j; 4594ac27a0ecSDave Kleikamp #endif 4595d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4596ac27a0ecSDave Kleikamp 4597ac27a0ecSDave Kleikamp /* Store the original options */ 4598ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4599ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4600a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4601ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4602ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4603ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 460430773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 460530773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4606ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4607ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4608ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 460903dafb5fSChen Gang if (sbi->s_qf_names[i]) { 461003dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 461103dafb5fSChen Gang GFP_KERNEL); 461203dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 461303dafb5fSChen Gang for (j = 0; j < i; j++) 461403dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 461503dafb5fSChen Gang return -ENOMEM; 461603dafb5fSChen Gang } 461703dafb5fSChen Gang } else 461803dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4619ac27a0ecSDave Kleikamp #endif 4620b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4621b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4622ac27a0ecSDave Kleikamp 4623ac27a0ecSDave Kleikamp /* 4624ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4625ac27a0ecSDave Kleikamp */ 4626661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4627ac27a0ecSDave Kleikamp err = -EINVAL; 4628ac27a0ecSDave Kleikamp goto restore_opts; 4629ac27a0ecSDave Kleikamp } 4630ac27a0ecSDave Kleikamp 46314ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4632c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4633ac27a0ecSDave Kleikamp 4634ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4635482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4636ac27a0ecSDave Kleikamp 4637ac27a0ecSDave Kleikamp es = sbi->s_es; 4638ac27a0ecSDave Kleikamp 4639b3881f74STheodore Ts'o if (sbi->s_journal) { 4640617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4641b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4642b3881f74STheodore Ts'o } 4643ac27a0ecSDave Kleikamp 4644661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 46454ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4646ac27a0ecSDave Kleikamp err = -EROFS; 4647ac27a0ecSDave Kleikamp goto restore_opts; 4648ac27a0ecSDave Kleikamp } 4649ac27a0ecSDave Kleikamp 4650ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 46510f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 46520f0dd62fSChristoph Hellwig if (err < 0) 4653c79d967dSChristoph Hellwig goto restore_opts; 4654c79d967dSChristoph Hellwig 4655ac27a0ecSDave Kleikamp /* 4656ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4657ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4658ac27a0ecSDave Kleikamp */ 4659ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4660ac27a0ecSDave Kleikamp 4661ac27a0ecSDave Kleikamp /* 4662ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4663ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4664ac27a0ecSDave Kleikamp * mark the partition as valid again. 4665ac27a0ecSDave Kleikamp */ 4666617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4667617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4668ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4669ac27a0ecSDave Kleikamp 4670a63c9eb2STheodore Ts'o if (sbi->s_journal) 4671617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4672ac27a0ecSDave Kleikamp } else { 4673a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4674a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4675ac27a0ecSDave Kleikamp err = -EROFS; 4676ac27a0ecSDave Kleikamp goto restore_opts; 4677ac27a0ecSDave Kleikamp } 4678ead6596bSEric Sandeen /* 46798a266467STheodore Ts'o * Make sure the group descriptor checksums 46800b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 46818a266467STheodore Ts'o */ 46828a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 46838a266467STheodore Ts'o struct ext4_group_desc *gdp = 46848a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 46858a266467STheodore Ts'o 4686feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4687b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4688b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 46898a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 46908a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 46918a266467STheodore Ts'o err = -EINVAL; 46928a266467STheodore Ts'o goto restore_opts; 46938a266467STheodore Ts'o } 46948a266467STheodore Ts'o } 46958a266467STheodore Ts'o 46968a266467STheodore Ts'o /* 4697ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4698ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4699ead6596bSEric Sandeen * require a full umount/remount for now. 4700ead6596bSEric Sandeen */ 4701ead6596bSEric Sandeen if (es->s_last_orphan) { 4702b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4703ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4704ead6596bSEric Sandeen "orphan inode list. Please " 4705b31e1552SEric Sandeen "umount/remount instead"); 4706ead6596bSEric Sandeen err = -EINVAL; 4707ead6596bSEric Sandeen goto restore_opts; 4708ead6596bSEric Sandeen } 4709ead6596bSEric Sandeen 4710ac27a0ecSDave Kleikamp /* 4711ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4712ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4713ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4714ac27a0ecSDave Kleikamp * the partition.) 4715ac27a0ecSDave Kleikamp */ 47160390131bSFrank Mayhar if (sbi->s_journal) 4717617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4718ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4719617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4720ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4721c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4722c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4723c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4724c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4725c5e06d10SJohann Lombardi err = -EROFS; 4726c5e06d10SJohann Lombardi goto restore_opts; 4727c5e06d10SJohann Lombardi } 4728c79d967dSChristoph Hellwig enable_quota = 1; 4729ac27a0ecSDave Kleikamp } 4730ac27a0ecSDave Kleikamp } 4731bfff6873SLukas Czerner 4732bfff6873SLukas Czerner /* 4733bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4734bfff6873SLukas Czerner * current settings 4735bfff6873SLukas Czerner */ 4736bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4737bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4738bfff6873SLukas Czerner else { 4739bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4740bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4741bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4742bfff6873SLukas Czerner } 4743bfff6873SLukas Czerner 47446fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4745d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 4746e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 47470390131bSFrank Mayhar 4748ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4749ac27a0ecSDave Kleikamp /* Release old quota file names */ 4750ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4751ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 47527c319d32SAditya Kali if (enable_quota) { 47537c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 47540f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 47557c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 47567c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 47577c319d32SAditya Kali err = ext4_enable_quotas(sb); 475807724f98STheodore Ts'o if (err) 47597c319d32SAditya Kali goto restore_opts; 47607c319d32SAditya Kali } 47617c319d32SAditya Kali } 47627c319d32SAditya Kali #endif 4763d4c402d9SCurt Wohlgemuth 4764d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4765d4c402d9SCurt Wohlgemuth kfree(orig_data); 4766ac27a0ecSDave Kleikamp return 0; 47670b8e58a1SAndreas Dilger 4768ac27a0ecSDave Kleikamp restore_opts: 4769ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4770ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4771a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4772ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4773ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4774ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 477530773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 477630773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4777ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4778ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4779ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4780ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4781ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4782ac27a0ecSDave Kleikamp } 4783ac27a0ecSDave Kleikamp #endif 4784d4c402d9SCurt Wohlgemuth kfree(orig_data); 4785ac27a0ecSDave Kleikamp return err; 4786ac27a0ecSDave Kleikamp } 4787ac27a0ecSDave Kleikamp 4788617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4789ac27a0ecSDave Kleikamp { 4790ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4791617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4792617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4793952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 4794960cc398SPekka Enberg u64 fsid; 4795d02a9391SKazuya Mio s64 bfree; 4796ac27a0ecSDave Kleikamp 4797952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 4798952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 4799ac27a0ecSDave Kleikamp 4800617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4801ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4802b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 480357042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 480457042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4805d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 480657042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 4807bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4808bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4809ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4810ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 481152d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4812617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4813960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4814960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4815960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4816960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 48170b8e58a1SAndreas Dilger 4818ac27a0ecSDave Kleikamp return 0; 4819ac27a0ecSDave Kleikamp } 4820ac27a0ecSDave Kleikamp 48210b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 48220b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4823ac27a0ecSDave Kleikamp * Process 1 Process 2 4824617ba13bSMingming Cao * ext4_create() quota_sync() 4825dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4826871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4827dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4828ac27a0ecSDave Kleikamp * 4829ac27a0ecSDave Kleikamp */ 4830ac27a0ecSDave Kleikamp 4831ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4832ac27a0ecSDave Kleikamp 4833ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4834ac27a0ecSDave Kleikamp { 48354c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 4836ac27a0ecSDave Kleikamp } 4837ac27a0ecSDave Kleikamp 4838617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4839ac27a0ecSDave Kleikamp { 4840ac27a0ecSDave Kleikamp int ret, err; 4841ac27a0ecSDave Kleikamp handle_t *handle; 4842ac27a0ecSDave Kleikamp struct inode *inode; 4843ac27a0ecSDave Kleikamp 4844ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4845617ba13bSMingming Cao handle = ext4_journal_start(inode, 4846617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4847ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4848ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4849ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4850617ba13bSMingming Cao err = ext4_journal_stop(handle); 4851ac27a0ecSDave Kleikamp if (!ret) 4852ac27a0ecSDave Kleikamp ret = err; 4853ac27a0ecSDave Kleikamp return ret; 4854ac27a0ecSDave Kleikamp } 4855ac27a0ecSDave Kleikamp 4856617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4857ac27a0ecSDave Kleikamp { 4858ac27a0ecSDave Kleikamp int ret, err; 4859ac27a0ecSDave Kleikamp handle_t *handle; 4860ac27a0ecSDave Kleikamp 4861617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4862617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4863ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4864ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4865ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4866617ba13bSMingming Cao err = ext4_journal_stop(handle); 4867ac27a0ecSDave Kleikamp if (!ret) 4868ac27a0ecSDave Kleikamp ret = err; 4869ac27a0ecSDave Kleikamp return ret; 4870ac27a0ecSDave Kleikamp } 4871ac27a0ecSDave Kleikamp 4872617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4873ac27a0ecSDave Kleikamp { 4874ac27a0ecSDave Kleikamp int ret, err; 4875ac27a0ecSDave Kleikamp handle_t *handle; 4876ac27a0ecSDave Kleikamp 4877617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4878617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 48799c3013e9SJan Kara if (IS_ERR(handle)) { 48809c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 48819c3013e9SJan Kara dquot_release(dquot); 4882ac27a0ecSDave Kleikamp return PTR_ERR(handle); 48839c3013e9SJan Kara } 4884ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4885617ba13bSMingming Cao err = ext4_journal_stop(handle); 4886ac27a0ecSDave Kleikamp if (!ret) 4887ac27a0ecSDave Kleikamp ret = err; 4888ac27a0ecSDave Kleikamp return ret; 4889ac27a0ecSDave Kleikamp } 4890ac27a0ecSDave Kleikamp 4891617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4892ac27a0ecSDave Kleikamp { 48932c8be6b2SJan Kara /* Are we journaling quotas? */ 4894617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4895617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4896ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4897617ba13bSMingming Cao return ext4_write_dquot(dquot); 4898ac27a0ecSDave Kleikamp } else { 4899ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4900ac27a0ecSDave Kleikamp } 4901ac27a0ecSDave Kleikamp } 4902ac27a0ecSDave Kleikamp 4903617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4904ac27a0ecSDave Kleikamp { 4905ac27a0ecSDave Kleikamp int ret, err; 4906ac27a0ecSDave Kleikamp handle_t *handle; 4907ac27a0ecSDave Kleikamp 4908ac27a0ecSDave Kleikamp /* Data block + inode block */ 4909617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4910ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4911ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4912ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4913617ba13bSMingming Cao err = ext4_journal_stop(handle); 4914ac27a0ecSDave Kleikamp if (!ret) 4915ac27a0ecSDave Kleikamp ret = err; 4916ac27a0ecSDave Kleikamp return ret; 4917ac27a0ecSDave Kleikamp } 4918ac27a0ecSDave Kleikamp 4919ac27a0ecSDave Kleikamp /* 4920ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4921ac27a0ecSDave Kleikamp * the quota file and such... 4922ac27a0ecSDave Kleikamp */ 4923617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4924ac27a0ecSDave Kleikamp { 4925287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4926617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4927ac27a0ecSDave Kleikamp } 4928ac27a0ecSDave Kleikamp 4929ac27a0ecSDave Kleikamp /* 4930ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4931ac27a0ecSDave Kleikamp */ 4932617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4933f00c9e44SJan Kara struct path *path) 4934ac27a0ecSDave Kleikamp { 4935ac27a0ecSDave Kleikamp int err; 4936ac27a0ecSDave Kleikamp 4937ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4938ac27a0ecSDave Kleikamp return -EINVAL; 49390623543bSJan Kara 4940ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4941d8c9584eSAl Viro if (path->dentry->d_sb != sb) 4942ac27a0ecSDave Kleikamp return -EXDEV; 49430623543bSJan Kara /* Journaling quota? */ 49440623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 49452b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4946f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4947b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4948b31e1552SEric Sandeen "Quota file not on filesystem root. " 4949b31e1552SEric Sandeen "Journaled quota will not work"); 49500623543bSJan Kara } 49510623543bSJan Kara 49520623543bSJan Kara /* 49530623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 49540623543bSJan Kara * all updates to the file when we bypass pagecache... 49550623543bSJan Kara */ 49560390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4957f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 49580623543bSJan Kara /* 49590623543bSJan Kara * We don't need to lock updates but journal_flush() could 49600623543bSJan Kara * otherwise be livelocked... 49610623543bSJan Kara */ 49620623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 49637ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 49640623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4965f00c9e44SJan Kara if (err) 49667ffe1ea8SHidehiro Kawai return err; 49677ffe1ea8SHidehiro Kawai } 49680623543bSJan Kara 4969f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4970ac27a0ecSDave Kleikamp } 4971ac27a0ecSDave Kleikamp 49727c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 49737c319d32SAditya Kali unsigned int flags) 49747c319d32SAditya Kali { 49757c319d32SAditya Kali int err; 49767c319d32SAditya Kali struct inode *qf_inode; 49777c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 49787c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 49797c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 49807c319d32SAditya Kali }; 49817c319d32SAditya Kali 49827c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 49837c319d32SAditya Kali 49847c319d32SAditya Kali if (!qf_inums[type]) 49857c319d32SAditya Kali return -EPERM; 49867c319d32SAditya Kali 49877c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 49887c319d32SAditya Kali if (IS_ERR(qf_inode)) { 49897c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 49907c319d32SAditya Kali return PTR_ERR(qf_inode); 49917c319d32SAditya Kali } 49927c319d32SAditya Kali 49937c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 49947c319d32SAditya Kali iput(qf_inode); 49957c319d32SAditya Kali 49967c319d32SAditya Kali return err; 49977c319d32SAditya Kali } 49987c319d32SAditya Kali 49997c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 50007c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 50017c319d32SAditya Kali { 50027c319d32SAditya Kali int type, err = 0; 50037c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 50047c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 50057c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 50067c319d32SAditya Kali }; 50077c319d32SAditya Kali 50087c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 50097c319d32SAditya Kali for (type = 0; type < MAXQUOTAS; type++) { 50107c319d32SAditya Kali if (qf_inums[type]) { 50117c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 50127c319d32SAditya Kali DQUOT_USAGE_ENABLED); 50137c319d32SAditya Kali if (err) { 50147c319d32SAditya Kali ext4_warning(sb, 501572ba7450STheodore Ts'o "Failed to enable quota tracking " 501672ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 501772ba7450STheodore Ts'o "e2fsck to fix.", type, err); 50187c319d32SAditya Kali return err; 50197c319d32SAditya Kali } 50207c319d32SAditya Kali } 50217c319d32SAditya Kali } 50227c319d32SAditya Kali return 0; 50237c319d32SAditya Kali } 50247c319d32SAditya Kali 50257c319d32SAditya Kali /* 50267c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 50277c319d32SAditya Kali */ 50287c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 50297c319d32SAditya Kali int format_id) 50307c319d32SAditya Kali { 50317c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 50327c319d32SAditya Kali return -EINVAL; 50337c319d32SAditya Kali 50347c319d32SAditya Kali /* 50357c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 50367c319d32SAditya Kali */ 50377c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 50387c319d32SAditya Kali } 50397c319d32SAditya Kali 5040ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5041ca0e05e4SDmitry Monakhov { 504221f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 504321f97697SJan Kara handle_t *handle; 504421f97697SJan Kara 504587009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 504687009d86SDmitry Monakhov * Caller already holds s_umount sem */ 504787009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5048ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5049ca0e05e4SDmitry Monakhov 50500b268590SAmir Goldstein if (!inode) 50510b268590SAmir Goldstein goto out; 50520b268590SAmir Goldstein 505321f97697SJan Kara /* Update modification times of quota files when userspace can 505421f97697SJan Kara * start looking at them */ 505521f97697SJan Kara handle = ext4_journal_start(inode, 1); 505621f97697SJan Kara if (IS_ERR(handle)) 505721f97697SJan Kara goto out; 505821f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 505921f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 506021f97697SJan Kara ext4_journal_stop(handle); 506121f97697SJan Kara 506221f97697SJan Kara out: 5063ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5064ca0e05e4SDmitry Monakhov } 5065ca0e05e4SDmitry Monakhov 50667c319d32SAditya Kali /* 50677c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 50687c319d32SAditya Kali */ 50697c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 50707c319d32SAditya Kali { 50717c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 50727c319d32SAditya Kali return -EINVAL; 50737c319d32SAditya Kali 50747c319d32SAditya Kali /* Disable only the limits. */ 50757c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 50767c319d32SAditya Kali } 50777c319d32SAditya Kali 5078ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5079ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5080ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5081ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5082617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5083ac27a0ecSDave Kleikamp size_t len, loff_t off) 5084ac27a0ecSDave Kleikamp { 5085ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5086725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5087ac27a0ecSDave Kleikamp int err = 0; 5088ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5089ac27a0ecSDave Kleikamp int tocopy; 5090ac27a0ecSDave Kleikamp size_t toread; 5091ac27a0ecSDave Kleikamp struct buffer_head *bh; 5092ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5093ac27a0ecSDave Kleikamp 5094ac27a0ecSDave Kleikamp if (off > i_size) 5095ac27a0ecSDave Kleikamp return 0; 5096ac27a0ecSDave Kleikamp if (off+len > i_size) 5097ac27a0ecSDave Kleikamp len = i_size-off; 5098ac27a0ecSDave Kleikamp toread = len; 5099ac27a0ecSDave Kleikamp while (toread > 0) { 5100ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5101ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 5102617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 5103ac27a0ecSDave Kleikamp if (err) 5104ac27a0ecSDave Kleikamp return err; 5105ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5106ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5107ac27a0ecSDave Kleikamp else 5108ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5109ac27a0ecSDave Kleikamp brelse(bh); 5110ac27a0ecSDave Kleikamp offset = 0; 5111ac27a0ecSDave Kleikamp toread -= tocopy; 5112ac27a0ecSDave Kleikamp data += tocopy; 5113ac27a0ecSDave Kleikamp blk++; 5114ac27a0ecSDave Kleikamp } 5115ac27a0ecSDave Kleikamp return len; 5116ac27a0ecSDave Kleikamp } 5117ac27a0ecSDave Kleikamp 5118ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5119ac27a0ecSDave Kleikamp * enough credits) */ 5120617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5121ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5122ac27a0ecSDave Kleikamp { 5123ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5124725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5125ac27a0ecSDave Kleikamp int err = 0; 5126ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5127ac27a0ecSDave Kleikamp struct buffer_head *bh; 5128ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5129ac27a0ecSDave Kleikamp 51300390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5131b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5132b31e1552SEric Sandeen " cancelled because transaction is not started", 51339c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 51349c3013e9SJan Kara return -EIO; 51359c3013e9SJan Kara } 513667eeb568SDmitry Monakhov /* 513767eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 513867eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 513967eeb568SDmitry Monakhov */ 514067eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 514167eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 514267eeb568SDmitry Monakhov " cancelled because not block aligned", 514367eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 514467eeb568SDmitry Monakhov return -EIO; 514567eeb568SDmitry Monakhov } 514667eeb568SDmitry Monakhov 5147617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 5148ac27a0ecSDave Kleikamp if (!bh) 5149ac27a0ecSDave Kleikamp goto out; 5150617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5151ac27a0ecSDave Kleikamp if (err) { 5152ac27a0ecSDave Kleikamp brelse(bh); 5153ac27a0ecSDave Kleikamp goto out; 5154ac27a0ecSDave Kleikamp } 5155ac27a0ecSDave Kleikamp lock_buffer(bh); 515667eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5157ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5158ac27a0ecSDave Kleikamp unlock_buffer(bh); 51590390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5160ac27a0ecSDave Kleikamp brelse(bh); 5161ac27a0ecSDave Kleikamp out: 51620b7f7cefSJan Kara if (err) 5163ac27a0ecSDave Kleikamp return err; 516467eeb568SDmitry Monakhov if (inode->i_size < off + len) { 516567eeb568SDmitry Monakhov i_size_write(inode, off + len); 5166617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5167617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 516821f97697SJan Kara } 516967eeb568SDmitry Monakhov return len; 5170ac27a0ecSDave Kleikamp } 5171ac27a0ecSDave Kleikamp 5172ac27a0ecSDave Kleikamp #endif 5173ac27a0ecSDave Kleikamp 5174152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5175152a0836SAl Viro const char *dev_name, void *data) 5176ac27a0ecSDave Kleikamp { 5177152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5178ac27a0ecSDave Kleikamp } 5179ac27a0ecSDave Kleikamp 518037f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 518124b58424STheodore Ts'o static inline void register_as_ext2(void) 518224b58424STheodore Ts'o { 518324b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 518424b58424STheodore Ts'o if (err) 518524b58424STheodore Ts'o printk(KERN_WARNING 518624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 518724b58424STheodore Ts'o } 518824b58424STheodore Ts'o 518924b58424STheodore Ts'o static inline void unregister_as_ext2(void) 519024b58424STheodore Ts'o { 519124b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 519224b58424STheodore Ts'o } 51932035e776STheodore Ts'o 51942035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 51952035e776STheodore Ts'o { 51962035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 51972035e776STheodore Ts'o return 0; 51982035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 51992035e776STheodore Ts'o return 1; 52002035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 52012035e776STheodore Ts'o return 0; 52022035e776STheodore Ts'o return 1; 52032035e776STheodore Ts'o } 520451b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 520524b58424STheodore Ts'o #else 520624b58424STheodore Ts'o static inline void register_as_ext2(void) { } 520724b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 52082035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 520924b58424STheodore Ts'o #endif 521024b58424STheodore Ts'o 521137f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 521224b58424STheodore Ts'o static inline void register_as_ext3(void) 521324b58424STheodore Ts'o { 521424b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 521524b58424STheodore Ts'o if (err) 521624b58424STheodore Ts'o printk(KERN_WARNING 521724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 521824b58424STheodore Ts'o } 521924b58424STheodore Ts'o 522024b58424STheodore Ts'o static inline void unregister_as_ext3(void) 522124b58424STheodore Ts'o { 522224b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 522324b58424STheodore Ts'o } 52242035e776STheodore Ts'o 52252035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 52262035e776STheodore Ts'o { 52272035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 52282035e776STheodore Ts'o return 0; 52292035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 52302035e776STheodore Ts'o return 0; 52312035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 52322035e776STheodore Ts'o return 1; 52332035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 52342035e776STheodore Ts'o return 0; 52352035e776STheodore Ts'o return 1; 52362035e776STheodore Ts'o } 523751b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 523824b58424STheodore Ts'o #else 523924b58424STheodore Ts'o static inline void register_as_ext3(void) { } 524024b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 52412035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 524224b58424STheodore Ts'o #endif 524324b58424STheodore Ts'o 524403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5245ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 524603010a33STheodore Ts'o .name = "ext4", 5247152a0836SAl Viro .mount = ext4_mount, 5248ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5249ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5250ac27a0ecSDave Kleikamp }; 5251ac27a0ecSDave Kleikamp 52528f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5253857ac889SLukas Czerner { 5254857ac889SLukas Czerner struct ext4_features *ef; 5255857ac889SLukas Czerner int ret = -ENOMEM; 5256857ac889SLukas Czerner 5257857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5258857ac889SLukas Czerner if (!ef) 5259857ac889SLukas Czerner goto out; 5260857ac889SLukas Czerner 5261857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5262857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5263857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5264857ac889SLukas Czerner "features"); 5265857ac889SLukas Czerner if (ret) { 5266857ac889SLukas Czerner kfree(ef); 5267857ac889SLukas Czerner goto out; 5268857ac889SLukas Czerner } 5269857ac889SLukas Czerner 5270857ac889SLukas Czerner ext4_feat = ef; 5271857ac889SLukas Czerner ret = 0; 5272857ac889SLukas Czerner out: 5273857ac889SLukas Czerner return ret; 5274857ac889SLukas Czerner } 5275857ac889SLukas Czerner 52768f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 52778f021222SLukas Czerner { 52788f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 52798f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 52808f021222SLukas Czerner kfree(ext4_feat); 52818f021222SLukas Czerner } 52828f021222SLukas Czerner 5283e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5284e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5285e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5286e9e3bcecSEric Sandeen 52875dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5288ac27a0ecSDave Kleikamp { 5289e9e3bcecSEric Sandeen int i, err; 5290c9de560dSAlex Tomas 529107c0c5d8SAl Viro ext4_li_info = NULL; 529207c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 529307c0c5d8SAl Viro 52949a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 529512e9b892SDmitry Monakhov ext4_check_flag_values(); 5296e9e3bcecSEric Sandeen 5297e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5298e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5299e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5300e9e3bcecSEric Sandeen } 5301e9e3bcecSEric Sandeen 530251865fdaSZheng Liu err = ext4_init_es(); 53036fd058f7STheodore Ts'o if (err) 53046fd058f7STheodore Ts'o return err; 530551865fdaSZheng Liu 530651865fdaSZheng Liu err = ext4_init_pageio(); 530751865fdaSZheng Liu if (err) 530851865fdaSZheng Liu goto out7; 530951865fdaSZheng Liu 53105dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5311bd2d0210STheodore Ts'o if (err) 5312d44651d0SFabrice Jouhaud goto out6; 53133197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 53140e376b1eSTheodore Ts'o if (!ext4_kset) { 53150e376b1eSTheodore Ts'o err = -ENOMEM; 5316dd68314cSTheodore Ts'o goto out5; 53170e376b1eSTheodore Ts'o } 5318d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5319857ac889SLukas Czerner 5320857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5321dd68314cSTheodore Ts'o if (err) 5322dd68314cSTheodore Ts'o goto out4; 5323857ac889SLukas Czerner 53245dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5325ac27a0ecSDave Kleikamp if (err) 53266fd058f7STheodore Ts'o goto out3; 5327c9de560dSAlex Tomas 53285dabfc78STheodore Ts'o err = ext4_init_xattr(); 5329c9de560dSAlex Tomas if (err) 5330c9de560dSAlex Tomas goto out2; 5331ac27a0ecSDave Kleikamp err = init_inodecache(); 5332ac27a0ecSDave Kleikamp if (err) 5333ac27a0ecSDave Kleikamp goto out1; 533424b58424STheodore Ts'o register_as_ext3(); 53352035e776STheodore Ts'o register_as_ext2(); 533603010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5337ac27a0ecSDave Kleikamp if (err) 5338ac27a0ecSDave Kleikamp goto out; 5339bfff6873SLukas Czerner 5340ac27a0ecSDave Kleikamp return 0; 5341ac27a0ecSDave Kleikamp out: 534224b58424STheodore Ts'o unregister_as_ext2(); 534324b58424STheodore Ts'o unregister_as_ext3(); 5344ac27a0ecSDave Kleikamp destroy_inodecache(); 5345ac27a0ecSDave Kleikamp out1: 53465dabfc78STheodore Ts'o ext4_exit_xattr(); 5347c9de560dSAlex Tomas out2: 53485dabfc78STheodore Ts'o ext4_exit_mballoc(); 53496fd058f7STheodore Ts'o out3: 53508f021222SLukas Czerner ext4_exit_feat_adverts(); 53516fd058f7STheodore Ts'o out4: 5352d44651d0SFabrice Jouhaud if (ext4_proc_root) 5353dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5354dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5355d44651d0SFabrice Jouhaud out5: 5356dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5357d44651d0SFabrice Jouhaud out6: 53585dabfc78STheodore Ts'o ext4_exit_pageio(); 535951865fdaSZheng Liu out7: 536051865fdaSZheng Liu ext4_exit_es(); 536151865fdaSZheng Liu 5362ac27a0ecSDave Kleikamp return err; 5363ac27a0ecSDave Kleikamp } 5364ac27a0ecSDave Kleikamp 53655dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5366ac27a0ecSDave Kleikamp { 5367bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 536824b58424STheodore Ts'o unregister_as_ext2(); 536924b58424STheodore Ts'o unregister_as_ext3(); 537003010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5371ac27a0ecSDave Kleikamp destroy_inodecache(); 53725dabfc78STheodore Ts'o ext4_exit_xattr(); 53735dabfc78STheodore Ts'o ext4_exit_mballoc(); 53748f021222SLukas Czerner ext4_exit_feat_adverts(); 53759f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 53763197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 53775dabfc78STheodore Ts'o ext4_exit_system_zone(); 53785dabfc78STheodore Ts'o ext4_exit_pageio(); 5379ac27a0ecSDave Kleikamp } 5380ac27a0ecSDave Kleikamp 5381ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 538283982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5383ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 53845dabfc78STheodore Ts'o module_init(ext4_init_fs) 53855dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5386