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" 486f91bc5fSEric Gouriou #include "ext4_extents.h" 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); 77617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 78c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 79152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 80152a0836SAl Viro const char *dev_name, void *data); 812035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 822035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 83d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 84bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 85bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 868f1f7453SEric Sandeen static void ext4_clear_request_list(void); 87ac27a0ecSDave Kleikamp 882035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 892035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 902035e776STheodore Ts'o .owner = THIS_MODULE, 912035e776STheodore Ts'o .name = "ext2", 922035e776STheodore Ts'o .mount = ext4_mount, 932035e776STheodore Ts'o .kill_sb = kill_block_super, 942035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 952035e776STheodore Ts'o }; 962035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 972035e776STheodore Ts'o #else 982035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 992035e776STheodore Ts'o #endif 1002035e776STheodore Ts'o 1012035e776STheodore Ts'o 102ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 103ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 104ba69f9abSJan Kara .owner = THIS_MODULE, 105ba69f9abSJan Kara .name = "ext3", 106152a0836SAl Viro .mount = ext4_mount, 107ba69f9abSJan Kara .kill_sb = kill_block_super, 108ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 109ba69f9abSJan Kara }; 110ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 111ba69f9abSJan Kara #else 112ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 113ba69f9abSJan Kara #endif 114bd81d8eeSLaurent Vivier 115d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 116d25425f8SDarrick J. Wong struct ext4_super_block *es) 117d25425f8SDarrick J. Wong { 118d25425f8SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 119d25425f8SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 120d25425f8SDarrick J. Wong return 1; 121d25425f8SDarrick J. Wong 122d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 123d25425f8SDarrick J. Wong } 124d25425f8SDarrick J. Wong 125a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 126a9c47317SDarrick J. Wong struct ext4_super_block *es) 127a9c47317SDarrick J. Wong { 128a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 129a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 130a9c47317SDarrick J. Wong __u32 csum; 131a9c47317SDarrick J. Wong 132a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 133a9c47317SDarrick J. Wong 134a9c47317SDarrick J. Wong return cpu_to_le32(csum); 135a9c47317SDarrick J. Wong } 136a9c47317SDarrick J. Wong 137a9c47317SDarrick J. Wong int ext4_superblock_csum_verify(struct super_block *sb, 138a9c47317SDarrick J. Wong struct ext4_super_block *es) 139a9c47317SDarrick J. Wong { 140a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 141a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 142a9c47317SDarrick J. Wong return 1; 143a9c47317SDarrick J. Wong 144a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 145a9c47317SDarrick J. Wong } 146a9c47317SDarrick J. Wong 147a9c47317SDarrick J. Wong void ext4_superblock_csum_set(struct super_block *sb, 148a9c47317SDarrick J. Wong struct ext4_super_block *es) 149a9c47317SDarrick J. Wong { 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 * 331ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 332ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 333ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 334ac27a0ecSDave Kleikamp * appropriate. 335be4f27d3SYongqiang Yang * 336be4f27d3SYongqiang Yang * To avoid j_barrier hold in userspace when a user calls freeze(), 337be4f27d3SYongqiang Yang * ext4 prevents a new handle from being started by s_frozen, which 338be4f27d3SYongqiang Yang * is in an upper layer. 339ac27a0ecSDave Kleikamp */ 340617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 341ac27a0ecSDave Kleikamp { 342ac27a0ecSDave Kleikamp journal_t *journal; 343be4f27d3SYongqiang Yang handle_t *handle; 344ac27a0ecSDave Kleikamp 34512706394STheodore Ts'o trace_ext4_journal_start(sb, nblocks, _RET_IP_); 346ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 347ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 348ac27a0ecSDave Kleikamp 349617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 350be4f27d3SYongqiang Yang handle = ext4_journal_current_handle(); 351be4f27d3SYongqiang Yang 352be4f27d3SYongqiang Yang /* 353be4f27d3SYongqiang Yang * If a handle has been started, it should be allowed to 354be4f27d3SYongqiang Yang * finish, otherwise deadlock could happen between freeze 355be4f27d3SYongqiang Yang * and others(e.g. truncate) due to the restart of the 356be4f27d3SYongqiang Yang * journal handle if the filesystem is forzen and active 357be4f27d3SYongqiang Yang * handles are not stopped. 358be4f27d3SYongqiang Yang */ 359be4f27d3SYongqiang Yang if (!handle) 360be4f27d3SYongqiang Yang vfs_check_frozen(sb, SB_FREEZE_TRANS); 361be4f27d3SYongqiang Yang 362be4f27d3SYongqiang Yang if (!journal) 363be4f27d3SYongqiang Yang return ext4_get_nojournal(); 364be4f27d3SYongqiang Yang /* 365be4f27d3SYongqiang Yang * Special case here: if the journal has aborted behind our 366be4f27d3SYongqiang Yang * backs (eg. EIO in the commit thread), then we still need to 367be4f27d3SYongqiang Yang * take the FS itself readonly cleanly. 368be4f27d3SYongqiang Yang */ 369ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 370c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 371ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 372ac27a0ecSDave Kleikamp } 373dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 374ac27a0ecSDave Kleikamp } 375ac27a0ecSDave Kleikamp 376ac27a0ecSDave Kleikamp /* 377ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 378dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 379ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 380ac27a0ecSDave Kleikamp * appropriate. 381ac27a0ecSDave Kleikamp */ 382c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 383ac27a0ecSDave Kleikamp { 384ac27a0ecSDave Kleikamp struct super_block *sb; 385ac27a0ecSDave Kleikamp int err; 386ac27a0ecSDave Kleikamp int rc; 387ac27a0ecSDave Kleikamp 3880390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 389d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 3900390131bSFrank Mayhar return 0; 3910390131bSFrank Mayhar } 392ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 393ac27a0ecSDave Kleikamp err = handle->h_err; 394dab291afSMingming Cao rc = jbd2_journal_stop(handle); 395ac27a0ecSDave Kleikamp 396ac27a0ecSDave Kleikamp if (!err) 397ac27a0ecSDave Kleikamp err = rc; 398ac27a0ecSDave Kleikamp if (err) 399c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 400ac27a0ecSDave Kleikamp return err; 401ac27a0ecSDave Kleikamp } 402ac27a0ecSDave Kleikamp 40390c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 40490c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 40590c7201bSTheodore Ts'o handle_t *handle, int err) 406ac27a0ecSDave Kleikamp { 407ac27a0ecSDave Kleikamp char nbuf[16]; 408617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 409ac27a0ecSDave Kleikamp 4100390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 4110390131bSFrank Mayhar 412ac27a0ecSDave Kleikamp if (bh) 413ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 414ac27a0ecSDave Kleikamp 415ac27a0ecSDave Kleikamp if (!handle->h_err) 416ac27a0ecSDave Kleikamp handle->h_err = err; 417ac27a0ecSDave Kleikamp 418ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 419ac27a0ecSDave Kleikamp return; 420ac27a0ecSDave Kleikamp 42192b97816STheodore Ts'o printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n", 42290c7201bSTheodore Ts'o caller, line, errstr, err_fn); 423ac27a0ecSDave Kleikamp 424dab291afSMingming Cao jbd2_journal_abort_handle(handle); 425ac27a0ecSDave Kleikamp } 426ac27a0ecSDave Kleikamp 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 struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4311c13d5c0STheodore Ts'o 4321c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4331c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4341c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 4351c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 4361c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 4371c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 4381c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 4391c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 4401c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 4411c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 4421c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 4431c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 4441c13d5c0STheodore Ts'o } 44566e61a9eSTheodore Ts'o /* 44666e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 44766e61a9eSTheodore Ts'o * started already 44866e61a9eSTheodore Ts'o */ 44966e61a9eSTheodore Ts'o if (!es->s_error_count) 45066e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 4511c13d5c0STheodore Ts'o es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); 4521c13d5c0STheodore Ts'o } 4531c13d5c0STheodore Ts'o 4541c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 4551c13d5c0STheodore Ts'o unsigned int line) 4561c13d5c0STheodore Ts'o { 4571c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 4581c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 4591c13d5c0STheodore Ts'o } 4601c13d5c0STheodore Ts'o 4617c2e7087STheodore Ts'o /* 4627c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 4637c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 4647c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 4657c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 4667c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 4677c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 4687c2e7087STheodore Ts'o */ 4697c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 4707c2e7087STheodore Ts'o { 4717c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 4727c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 4737c2e7087STheodore Ts'o 4747c2e7087STheodore Ts'o return bdi->dev == NULL; 4757c2e7087STheodore Ts'o } 4767c2e7087STheodore Ts'o 47718aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 47818aadd47SBobi Jam { 47918aadd47SBobi Jam struct super_block *sb = journal->j_private; 48018aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 48118aadd47SBobi Jam int error = is_journal_aborted(journal); 48218aadd47SBobi Jam struct ext4_journal_cb_entry *jce, *tmp; 48318aadd47SBobi Jam 48418aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 48518aadd47SBobi Jam list_for_each_entry_safe(jce, tmp, &txn->t_private_list, jce_list) { 48618aadd47SBobi Jam list_del_init(&jce->jce_list); 48718aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 48818aadd47SBobi Jam jce->jce_func(sb, jce, error); 48918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 49018aadd47SBobi Jam } 49118aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 49218aadd47SBobi Jam } 4931c13d5c0STheodore Ts'o 494ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 495ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 496ac27a0ecSDave Kleikamp * 497ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 498617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 499ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 500ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 501ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 502ac27a0ecSDave Kleikamp * write out the superblock safely. 503ac27a0ecSDave Kleikamp * 504dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 505d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 506ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 507ac27a0ecSDave Kleikamp */ 508ac27a0ecSDave Kleikamp 509617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 510ac27a0ecSDave Kleikamp { 511ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 512ac27a0ecSDave Kleikamp return; 513ac27a0ecSDave Kleikamp 514ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 515617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 516ac27a0ecSDave Kleikamp 5174ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 518ac27a0ecSDave Kleikamp if (journal) 519dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 520ac27a0ecSDave Kleikamp } 521ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 522b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 523ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 524ac27a0ecSDave Kleikamp } 525ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 526617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 527ac27a0ecSDave Kleikamp sb->s_id); 528ac27a0ecSDave Kleikamp } 529ac27a0ecSDave Kleikamp 53012062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 531c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 532ac27a0ecSDave Kleikamp { 5330ff2ea7dSJoe Perches struct va_format vaf; 534ac27a0ecSDave Kleikamp va_list args; 535ac27a0ecSDave Kleikamp 536ac27a0ecSDave Kleikamp va_start(args, fmt); 5370ff2ea7dSJoe Perches vaf.fmt = fmt; 5380ff2ea7dSJoe Perches vaf.va = &args; 5390ff2ea7dSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 5400ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 541ac27a0ecSDave Kleikamp va_end(args); 542f3fc0210STheodore Ts'o save_error_info(sb, function, line); 543ac27a0ecSDave Kleikamp 544617ba13bSMingming Cao ext4_handle_error(sb); 545ac27a0ecSDave Kleikamp } 546ac27a0ecSDave Kleikamp 547c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 548c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 549273df556SFrank Mayhar const char *fmt, ...) 550273df556SFrank Mayhar { 551273df556SFrank Mayhar va_list args; 552f7c21177STheodore Ts'o struct va_format vaf; 5531c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 554273df556SFrank Mayhar 5551c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5561c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 5571c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 558273df556SFrank Mayhar va_start(args, fmt); 559f7c21177STheodore Ts'o vaf.fmt = fmt; 560f7c21177STheodore Ts'o vaf.va = &args; 561c398eda0STheodore Ts'o if (block) 562d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 563d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 564d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 565d9ee81daSJoe Perches block, current->comm, &vaf); 566d9ee81daSJoe Perches else 567d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 568d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 569d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 570d9ee81daSJoe Perches current->comm, &vaf); 571273df556SFrank Mayhar va_end(args); 572273df556SFrank Mayhar 573273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 574273df556SFrank Mayhar } 575273df556SFrank Mayhar 576c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 577f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 578f7c21177STheodore Ts'o const char *fmt, ...) 579273df556SFrank Mayhar { 580273df556SFrank Mayhar va_list args; 581f7c21177STheodore Ts'o struct va_format vaf; 5821c13d5c0STheodore Ts'o struct ext4_super_block *es; 583273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 584273df556SFrank Mayhar char pathname[80], *path; 585273df556SFrank Mayhar 5861c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5871c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5881c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 589273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 590f9a62d09SDan Carpenter if (IS_ERR(path)) 591273df556SFrank Mayhar path = "(unknown)"; 592f7c21177STheodore Ts'o va_start(args, fmt); 593f7c21177STheodore Ts'o vaf.fmt = fmt; 594f7c21177STheodore Ts'o vaf.va = &args; 595d9ee81daSJoe Perches if (block) 596d9ee81daSJoe Perches printk(KERN_CRIT 597d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 598d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 599d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 600d9ee81daSJoe Perches block, current->comm, path, &vaf); 601d9ee81daSJoe Perches else 602d9ee81daSJoe Perches printk(KERN_CRIT 603d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 604d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 605d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 606d9ee81daSJoe Perches current->comm, path, &vaf); 607273df556SFrank Mayhar va_end(args); 608273df556SFrank Mayhar 609273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 610273df556SFrank Mayhar } 611273df556SFrank Mayhar 612617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 613ac27a0ecSDave Kleikamp char nbuf[16]) 614ac27a0ecSDave Kleikamp { 615ac27a0ecSDave Kleikamp char *errstr = NULL; 616ac27a0ecSDave Kleikamp 617ac27a0ecSDave Kleikamp switch (errno) { 618ac27a0ecSDave Kleikamp case -EIO: 619ac27a0ecSDave Kleikamp errstr = "IO failure"; 620ac27a0ecSDave Kleikamp break; 621ac27a0ecSDave Kleikamp case -ENOMEM: 622ac27a0ecSDave Kleikamp errstr = "Out of memory"; 623ac27a0ecSDave Kleikamp break; 624ac27a0ecSDave Kleikamp case -EROFS: 62578f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 62678f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 627ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 628ac27a0ecSDave Kleikamp else 629ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 630ac27a0ecSDave Kleikamp break; 631ac27a0ecSDave Kleikamp default: 632ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 633ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 634ac27a0ecSDave Kleikamp * NULL. */ 635ac27a0ecSDave Kleikamp if (nbuf) { 636ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 637ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 638ac27a0ecSDave Kleikamp errstr = nbuf; 639ac27a0ecSDave Kleikamp } 640ac27a0ecSDave Kleikamp break; 641ac27a0ecSDave Kleikamp } 642ac27a0ecSDave Kleikamp 643ac27a0ecSDave Kleikamp return errstr; 644ac27a0ecSDave Kleikamp } 645ac27a0ecSDave Kleikamp 646617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 647ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 648ac27a0ecSDave Kleikamp 649c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 650c398eda0STheodore Ts'o unsigned int line, int errno) 651ac27a0ecSDave Kleikamp { 652ac27a0ecSDave Kleikamp char nbuf[16]; 653ac27a0ecSDave Kleikamp const char *errstr; 654ac27a0ecSDave Kleikamp 655ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 656ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 657ac27a0ecSDave Kleikamp * an error. */ 658ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 659ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 660ac27a0ecSDave Kleikamp return; 661ac27a0ecSDave Kleikamp 662617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 663c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 664c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 6651c13d5c0STheodore Ts'o save_error_info(sb, function, line); 666ac27a0ecSDave Kleikamp 667617ba13bSMingming Cao ext4_handle_error(sb); 668ac27a0ecSDave Kleikamp } 669ac27a0ecSDave Kleikamp 670ac27a0ecSDave Kleikamp /* 671617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 672ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 673ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 674ac27a0ecSDave Kleikamp * 675ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 676ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 677ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 678ac27a0ecSDave Kleikamp */ 679ac27a0ecSDave Kleikamp 680c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 681c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 682ac27a0ecSDave Kleikamp { 683ac27a0ecSDave Kleikamp va_list args; 684ac27a0ecSDave Kleikamp 6851c13d5c0STheodore Ts'o save_error_info(sb, function, line); 686ac27a0ecSDave Kleikamp va_start(args, fmt); 687c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 688c398eda0STheodore Ts'o function, line); 689ac27a0ecSDave Kleikamp vprintk(fmt, args); 690ac27a0ecSDave Kleikamp printk("\n"); 691ac27a0ecSDave Kleikamp va_end(args); 692ac27a0ecSDave Kleikamp 6931c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 694b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 695ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 6964ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 697ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 698dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6991c13d5c0STheodore Ts'o save_error_info(sb, function, line); 7001c13d5c0STheodore Ts'o } 7011c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 7021c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 703ac27a0ecSDave Kleikamp } 704ac27a0ecSDave Kleikamp 7050ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 706b31e1552SEric Sandeen { 7070ff2ea7dSJoe Perches struct va_format vaf; 708b31e1552SEric Sandeen va_list args; 709b31e1552SEric Sandeen 710b31e1552SEric Sandeen va_start(args, fmt); 7110ff2ea7dSJoe Perches vaf.fmt = fmt; 7120ff2ea7dSJoe Perches vaf.va = &args; 7130ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 714b31e1552SEric Sandeen va_end(args); 715b31e1552SEric Sandeen } 716b31e1552SEric Sandeen 71712062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 718c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 719ac27a0ecSDave Kleikamp { 7200ff2ea7dSJoe Perches struct va_format vaf; 721ac27a0ecSDave Kleikamp va_list args; 722ac27a0ecSDave Kleikamp 723ac27a0ecSDave Kleikamp va_start(args, fmt); 7240ff2ea7dSJoe Perches vaf.fmt = fmt; 7250ff2ea7dSJoe Perches vaf.va = &args; 7260ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 7270ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 728ac27a0ecSDave Kleikamp va_end(args); 729ac27a0ecSDave Kleikamp } 730ac27a0ecSDave Kleikamp 731e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 732e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 733e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 734e29136f8STheodore Ts'o const char *fmt, ...) 7355d1b1b3fSAneesh Kumar K.V __releases(bitlock) 7365d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 7375d1b1b3fSAneesh Kumar K.V { 7380ff2ea7dSJoe Perches struct va_format vaf; 7395d1b1b3fSAneesh Kumar K.V va_list args; 7405d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 7415d1b1b3fSAneesh Kumar K.V 7421c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 7431c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 7441c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 7450ff2ea7dSJoe Perches 7465d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7470ff2ea7dSJoe Perches 7480ff2ea7dSJoe Perches vaf.fmt = fmt; 7490ff2ea7dSJoe Perches vaf.va = &args; 75021149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 751e29136f8STheodore Ts'o sb->s_id, function, line, grp); 752e29136f8STheodore Ts'o if (ino) 7530ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 754e29136f8STheodore Ts'o if (block) 7550ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 7560ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7575d1b1b3fSAneesh Kumar K.V va_end(args); 7585d1b1b3fSAneesh Kumar K.V 7595d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 760e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7615d1b1b3fSAneesh Kumar K.V return; 7625d1b1b3fSAneesh Kumar K.V } 7631c13d5c0STheodore Ts'o 7645d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 7655d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7665d1b1b3fSAneesh Kumar K.V /* 7675d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7685d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7695d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7705d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7715d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 77225985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7735d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7745d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7755d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7765d1b1b3fSAneesh Kumar K.V */ 7775d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7785d1b1b3fSAneesh Kumar K.V return; 7795d1b1b3fSAneesh Kumar K.V } 7805d1b1b3fSAneesh Kumar K.V 781617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 782ac27a0ecSDave Kleikamp { 783617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 784ac27a0ecSDave Kleikamp 785617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 786ac27a0ecSDave Kleikamp return; 787ac27a0ecSDave Kleikamp 78812062dddSEric Sandeen ext4_warning(sb, 789ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 790ac27a0ecSDave Kleikamp "running e2fsck is recommended", 791617ba13bSMingming Cao EXT4_DYNAMIC_REV); 792ac27a0ecSDave Kleikamp 793617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 794617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 795617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 796ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 797ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 798ac27a0ecSDave Kleikamp 799ac27a0ecSDave Kleikamp /* 800ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 801ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 802ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 803ac27a0ecSDave Kleikamp */ 804ac27a0ecSDave Kleikamp } 805ac27a0ecSDave Kleikamp 806ac27a0ecSDave Kleikamp /* 807ac27a0ecSDave Kleikamp * Open the external journal device 808ac27a0ecSDave Kleikamp */ 809b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 810ac27a0ecSDave Kleikamp { 811ac27a0ecSDave Kleikamp struct block_device *bdev; 812ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 813ac27a0ecSDave Kleikamp 814d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 815ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 816ac27a0ecSDave Kleikamp goto fail; 817ac27a0ecSDave Kleikamp return bdev; 818ac27a0ecSDave Kleikamp 819ac27a0ecSDave Kleikamp fail: 820b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 821ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 822ac27a0ecSDave Kleikamp return NULL; 823ac27a0ecSDave Kleikamp } 824ac27a0ecSDave Kleikamp 825ac27a0ecSDave Kleikamp /* 826ac27a0ecSDave Kleikamp * Release the journal device 827ac27a0ecSDave Kleikamp */ 828617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 829ac27a0ecSDave Kleikamp { 830e525fd89STejun Heo return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 831ac27a0ecSDave Kleikamp } 832ac27a0ecSDave Kleikamp 833617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 834ac27a0ecSDave Kleikamp { 835ac27a0ecSDave Kleikamp struct block_device *bdev; 836ac27a0ecSDave Kleikamp int ret = -ENODEV; 837ac27a0ecSDave Kleikamp 838ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 839ac27a0ecSDave Kleikamp if (bdev) { 840617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 841ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 842ac27a0ecSDave Kleikamp } 843ac27a0ecSDave Kleikamp return ret; 844ac27a0ecSDave Kleikamp } 845ac27a0ecSDave Kleikamp 846ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 847ac27a0ecSDave Kleikamp { 848617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 849ac27a0ecSDave Kleikamp } 850ac27a0ecSDave Kleikamp 851617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 852ac27a0ecSDave Kleikamp { 853ac27a0ecSDave Kleikamp struct list_head *l; 854ac27a0ecSDave Kleikamp 855b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 856ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 857ac27a0ecSDave Kleikamp 858ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 859ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 860ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 861ac27a0ecSDave Kleikamp printk(KERN_ERR " " 862ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 863ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 864ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 865ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 866ac27a0ecSDave Kleikamp } 867ac27a0ecSDave Kleikamp } 868ac27a0ecSDave Kleikamp 869617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 870ac27a0ecSDave Kleikamp { 871617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 872617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 873ef2cabf7SHidehiro Kawai int i, err; 874ac27a0ecSDave Kleikamp 875857ac889SLukas Czerner ext4_unregister_li_request(sb); 876e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 877e0ccfd95SChristoph Hellwig 8784c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 8794c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 8804c0425ffSMingming Cao 881a9e220f8SAl Viro lock_super(sb); 8820390131bSFrank Mayhar if (sbi->s_journal) { 883ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 88447b4a50bSJan Kara sbi->s_journal = NULL; 885ef2cabf7SHidehiro Kawai if (err < 0) 886c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8870390131bSFrank Mayhar } 888d4edac31SJosef Bacik 889a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 890d4edac31SJosef Bacik ext4_release_system_zone(sb); 891d4edac31SJosef Bacik ext4_mb_release(sb); 892d4edac31SJosef Bacik ext4_ext_release(sb); 893d4edac31SJosef Bacik ext4_xattr_put_super(sb); 894d4edac31SJosef Bacik 895ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 896617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 897ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 898ac27a0ecSDave Kleikamp } 899a8e25a83SArtem Bityutskiy if (sb->s_dirt || !(sb->s_flags & MS_RDONLY)) 900a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 901a8e25a83SArtem Bityutskiy 902240799cdSTheodore Ts'o if (sbi->s_proc) { 90366acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 9049f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 905240799cdSTheodore Ts'o } 9063197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 907ac27a0ecSDave Kleikamp 908ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 909ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 910f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 9119933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 91257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 913ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 914ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 91557042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 916ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 917ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 918ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 919ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 920ac27a0ecSDave Kleikamp #endif 921ac27a0ecSDave Kleikamp 922ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 923ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 924ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 925ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 926ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 927ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 928ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 929ac27a0ecSDave Kleikamp 930f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 931ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 932ac27a0ecSDave Kleikamp /* 933ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 934ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 935ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 936ac27a0ecSDave Kleikamp */ 937ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 938f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 939617ba13bSMingming Cao ext4_blkdev_remove(sbi); 940ac27a0ecSDave Kleikamp } 941c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 942c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 943ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 9443197ebdbSTheodore Ts'o /* 9453197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 9463197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9473197ebdbSTheodore Ts'o */ 9483197ebdbSTheodore Ts'o unlock_super(sb); 9493197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9503197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9510441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9520441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 953705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 954ac27a0ecSDave Kleikamp kfree(sbi); 955ac27a0ecSDave Kleikamp } 956ac27a0ecSDave Kleikamp 957e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 958ac27a0ecSDave Kleikamp 959ac27a0ecSDave Kleikamp /* 960ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 961ac27a0ecSDave Kleikamp */ 962617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 963ac27a0ecSDave Kleikamp { 964617ba13bSMingming Cao struct ext4_inode_info *ei; 965ac27a0ecSDave Kleikamp 966e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 967ac27a0ecSDave Kleikamp if (!ei) 968ac27a0ecSDave Kleikamp return NULL; 9690b8e58a1SAndreas Dilger 970ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 97191246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 972a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 973c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 974c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 975d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 976d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 977d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9789d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 979d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 980a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 981a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 982a9e7f447SDmitry Monakhov #endif 9838aefcd55STheodore Ts'o ei->jinode = NULL; 984c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 985744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 9868d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 987b436b9beSJan Kara ei->i_sync_tid = 0; 988b436b9beSJan Kara ei->i_datasync_tid = 0; 989f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 990e9e3bcecSEric Sandeen atomic_set(&ei->i_aiodio_unwritten, 0); 9910b8e58a1SAndreas Dilger 992ac27a0ecSDave Kleikamp return &ei->vfs_inode; 993ac27a0ecSDave Kleikamp } 994ac27a0ecSDave Kleikamp 9957ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9967ff9c073STheodore Ts'o { 9977ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9987ff9c073STheodore Ts'o 9997ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 10007ff9c073STheodore Ts'o return drop; 10017ff9c073STheodore Ts'o } 10027ff9c073STheodore Ts'o 1003fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 1004fa0d7e3dSNick Piggin { 1005fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 1006fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1007fa0d7e3dSNick Piggin } 1008fa0d7e3dSNick Piggin 1009617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1010ac27a0ecSDave Kleikamp { 10119f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1012b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1013b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1014b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 10159f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 10169f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 10179f7dd93dSVasily Averin true); 10189f7dd93dSVasily Averin dump_stack(); 10199f7dd93dSVasily Averin } 1020fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 1021ac27a0ecSDave Kleikamp } 1022ac27a0ecSDave Kleikamp 102351cc5068SAlexey Dobriyan static void init_once(void *foo) 1024ac27a0ecSDave Kleikamp { 1025617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1026ac27a0ecSDave Kleikamp 1027ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 102803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1029ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 1030ac27a0ecSDave Kleikamp #endif 10310e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1032ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1033ac27a0ecSDave Kleikamp } 1034ac27a0ecSDave Kleikamp 1035ac27a0ecSDave Kleikamp static int init_inodecache(void) 1036ac27a0ecSDave Kleikamp { 1037617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 1038617ba13bSMingming Cao sizeof(struct ext4_inode_info), 1039ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 1040ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 104120c2df83SPaul Mundt init_once); 1042617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1043ac27a0ecSDave Kleikamp return -ENOMEM; 1044ac27a0ecSDave Kleikamp return 0; 1045ac27a0ecSDave Kleikamp } 1046ac27a0ecSDave Kleikamp 1047ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1048ac27a0ecSDave Kleikamp { 1049617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1050ac27a0ecSDave Kleikamp } 1051ac27a0ecSDave Kleikamp 10520930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1053ac27a0ecSDave Kleikamp { 10540930fcc1SAl Viro invalidate_inode_buffers(inode); 1055dbd5768fSJan Kara clear_inode(inode); 10569f754758SChristoph Hellwig dquot_drop(inode); 1057c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 10588aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10598aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10608aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10618aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10628aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10638aefcd55STheodore Ts'o } 1064ac27a0ecSDave Kleikamp } 1065ac27a0ecSDave Kleikamp 10661b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10671b961ac0SChristoph Hellwig u64 ino, u32 generation) 1068ac27a0ecSDave Kleikamp { 1069ac27a0ecSDave Kleikamp struct inode *inode; 1070ac27a0ecSDave Kleikamp 1071617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1072ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1073617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1074ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1075ac27a0ecSDave Kleikamp 1076ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1077ac27a0ecSDave Kleikamp * 1078617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1079ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1080ac27a0ecSDave Kleikamp * 1081ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1082ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1083ac27a0ecSDave Kleikamp */ 10841d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10851d1fe1eeSDavid Howells if (IS_ERR(inode)) 10861d1fe1eeSDavid Howells return ERR_CAST(inode); 10871d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1088ac27a0ecSDave Kleikamp iput(inode); 1089ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1090ac27a0ecSDave Kleikamp } 10911b961ac0SChristoph Hellwig 10921b961ac0SChristoph Hellwig return inode; 1093ac27a0ecSDave Kleikamp } 10941b961ac0SChristoph Hellwig 10951b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10961b961ac0SChristoph Hellwig int fh_len, int fh_type) 10971b961ac0SChristoph Hellwig { 10981b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10991b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11001b961ac0SChristoph Hellwig } 11011b961ac0SChristoph Hellwig 11021b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11031b961ac0SChristoph Hellwig int fh_len, int fh_type) 11041b961ac0SChristoph Hellwig { 11051b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11061b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1107ac27a0ecSDave Kleikamp } 1108ac27a0ecSDave Kleikamp 1109c39a7f84SToshiyuki Okajima /* 1110c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1111c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1112c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1113c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1114c39a7f84SToshiyuki Okajima */ 11150b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11160b8e58a1SAndreas Dilger gfp_t wait) 1117c39a7f84SToshiyuki Okajima { 1118c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1119c39a7f84SToshiyuki Okajima 1120c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1121c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1122c39a7f84SToshiyuki Okajima return 0; 1123c39a7f84SToshiyuki Okajima if (journal) 1124c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1125c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1126c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1127c39a7f84SToshiyuki Okajima } 1128c39a7f84SToshiyuki Okajima 1129ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1130ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1131ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1132ac27a0ecSDave Kleikamp 1133617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1134617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1135617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1136617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1137617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11386f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1139f00c9e44SJan Kara struct path *path); 1140ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1141617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1142617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1143ac27a0ecSDave Kleikamp size_t len, loff_t off); 1144617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1145ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1146ac27a0ecSDave Kleikamp 114761e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 114860e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1149617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1150617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1151617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1152617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1153a5b5ee32SJan Kara .write_info = ext4_write_info, 1154a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1155a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1156ac27a0ecSDave Kleikamp }; 1157ac27a0ecSDave Kleikamp 11580d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1159617ba13bSMingming Cao .quota_on = ext4_quota_on, 1160ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1161287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1162287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1163287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1164287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1165287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1166ac27a0ecSDave Kleikamp }; 1167ac27a0ecSDave Kleikamp #endif 1168ac27a0ecSDave Kleikamp 1169ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1170617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1171617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1172617ba13bSMingming Cao .write_inode = ext4_write_inode, 1173617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11747ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11750930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1176617ba13bSMingming Cao .put_super = ext4_put_super, 1177617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1178c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1179c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1180617ba13bSMingming Cao .statfs = ext4_statfs, 1181617ba13bSMingming Cao .remount_fs = ext4_remount, 1182617ba13bSMingming Cao .show_options = ext4_show_options, 1183ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1184617ba13bSMingming Cao .quota_read = ext4_quota_read, 1185617ba13bSMingming Cao .quota_write = ext4_quota_write, 1186ac27a0ecSDave Kleikamp #endif 1187c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1188ac27a0ecSDave Kleikamp }; 1189ac27a0ecSDave Kleikamp 11909ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11919ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11929ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11939ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11949ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11957ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11960930fcc1SAl Viro .evict_inode = ext4_evict_inode, 11979ca92389STheodore Ts'o .write_super = ext4_write_super, 11989ca92389STheodore Ts'o .put_super = ext4_put_super, 11999ca92389STheodore Ts'o .statfs = ext4_statfs, 12009ca92389STheodore Ts'o .remount_fs = ext4_remount, 12019ca92389STheodore Ts'o .show_options = ext4_show_options, 12029ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 12039ca92389STheodore Ts'o .quota_read = ext4_quota_read, 12049ca92389STheodore Ts'o .quota_write = ext4_quota_write, 12059ca92389STheodore Ts'o #endif 12069ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 12079ca92389STheodore Ts'o }; 12089ca92389STheodore Ts'o 120939655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12101b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12111b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1212617ba13bSMingming Cao .get_parent = ext4_get_parent, 1213ac27a0ecSDave Kleikamp }; 1214ac27a0ecSDave Kleikamp 1215ac27a0ecSDave Kleikamp enum { 1216ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1217ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 121872578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1219ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 122072578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 122130773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 122243e625d8SEric Sandeen Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, 1223ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1224296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1225ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 12265a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1227ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1228661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 12291449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 12301449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 12315328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1232744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1233fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1234ac27a0ecSDave Kleikamp }; 1235ac27a0ecSDave Kleikamp 1236a447c093SSteven Whitehouse static const match_table_t tokens = { 1237ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1238ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1239ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1240ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1241ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1242ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1243ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1244ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1245ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1246ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1247ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1248ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1249ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1250ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 125172578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 125272578c33STheodore Ts'o {Opt_removed, "orlov"}, 1253ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1254ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1255ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1256ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1257e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 12585a916be1STheodore Ts'o {Opt_noload, "noload"}, 125972578c33STheodore Ts'o {Opt_removed, "nobh"}, 126072578c33STheodore Ts'o {Opt_removed, "bh"}, 1261ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 126230773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 126330773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1264ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1265818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1266818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1267ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1268ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1269ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1270ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12715bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12725bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1273ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1274ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1275ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1276ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1277ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1278ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12795a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1280ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1281ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1282ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1283ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1284ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 128506705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 128606705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 128725ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1288c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 128964769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1290dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 12911449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 12921449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 12936fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12946fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1295240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1296b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1297afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 129806705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 129906705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1300744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1301744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13025328e635SEric Sandeen {Opt_discard, "discard"}, 13035328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1304fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1305fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1306fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1307c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1308c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1309c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1310c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1311c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1312f3f12faaSJosef Bacik {Opt_err, NULL}, 1313ac27a0ecSDave Kleikamp }; 1314ac27a0ecSDave Kleikamp 1315617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1316ac27a0ecSDave Kleikamp { 1317617ba13bSMingming Cao ext4_fsblk_t sb_block; 1318ac27a0ecSDave Kleikamp char *options = (char *) *data; 1319ac27a0ecSDave Kleikamp 1320ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1321ac27a0ecSDave Kleikamp return 1; /* Default location */ 13220b8e58a1SAndreas Dilger 1323ac27a0ecSDave Kleikamp options += 3; 13240b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1325ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1326ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13274776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1328ac27a0ecSDave Kleikamp (char *) *data); 1329ac27a0ecSDave Kleikamp return 1; 1330ac27a0ecSDave Kleikamp } 1331ac27a0ecSDave Kleikamp if (*options == ',') 1332ac27a0ecSDave Kleikamp options++; 1333ac27a0ecSDave Kleikamp *data = (void *) options; 13340b8e58a1SAndreas Dilger 1335ac27a0ecSDave Kleikamp return sb_block; 1336ac27a0ecSDave Kleikamp } 1337ac27a0ecSDave Kleikamp 1338b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1339437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1340437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1341b3881f74STheodore Ts'o 134256c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 134356c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 134456c50f11SDmitry Monakhov { 134556c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 134656c50f11SDmitry Monakhov char *qname; 134756c50f11SDmitry Monakhov 134856c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 134956c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 135056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 135156c50f11SDmitry Monakhov "Cannot change journaled " 135256c50f11SDmitry Monakhov "quota options when quota turned on"); 135357f73c2cSTheodore Ts'o return -1; 135456c50f11SDmitry Monakhov } 135556c50f11SDmitry Monakhov qname = match_strdup(args); 135656c50f11SDmitry Monakhov if (!qname) { 135756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 135856c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 135957f73c2cSTheodore Ts'o return -1; 136056c50f11SDmitry Monakhov } 136156c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 136256c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 136356c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 136456c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 136556c50f11SDmitry Monakhov kfree(qname); 136657f73c2cSTheodore Ts'o return -1; 136756c50f11SDmitry Monakhov } 136856c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 136956c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 137056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 137156c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 137256c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 137356c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 137457f73c2cSTheodore Ts'o return -1; 137556c50f11SDmitry Monakhov } 1376fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 137756c50f11SDmitry Monakhov return 1; 137856c50f11SDmitry Monakhov } 137956c50f11SDmitry Monakhov 138056c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 138156c50f11SDmitry Monakhov { 138256c50f11SDmitry Monakhov 138356c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 138456c50f11SDmitry Monakhov 138556c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 138656c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 138756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 138856c50f11SDmitry Monakhov " when quota turned on"); 138957f73c2cSTheodore Ts'o return -1; 139056c50f11SDmitry Monakhov } 139156c50f11SDmitry Monakhov /* 139256c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 139356c50f11SDmitry Monakhov * to be correct 139456c50f11SDmitry Monakhov */ 139556c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 139656c50f11SDmitry Monakhov return 1; 139756c50f11SDmitry Monakhov } 139856c50f11SDmitry Monakhov #endif 139956c50f11SDmitry Monakhov 140026092bf5STheodore Ts'o #define MOPT_SET 0x0001 140126092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 140226092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 140326092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 140426092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 140526092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 140626092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 140726092bf5STheodore Ts'o #define MOPT_Q 0 140826092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 140926092bf5STheodore Ts'o #else 141026092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 141126092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 141226092bf5STheodore Ts'o #endif 141326092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 141426092bf5STheodore Ts'o 141526092bf5STheodore Ts'o static const struct mount_opts { 141626092bf5STheodore Ts'o int token; 141726092bf5STheodore Ts'o int mount_opt; 141826092bf5STheodore Ts'o int flags; 141926092bf5STheodore Ts'o } ext4_mount_opts[] = { 142026092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 142126092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 142226092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 142326092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 142426092bf5STheodore Ts'o {Opt_mblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_SET}, 142526092bf5STheodore Ts'o {Opt_nomblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_CLEAR}, 142626092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 142726092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 142826092bf5STheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_SET}, 142926092bf5STheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_CLEAR}, 143026092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 143126092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 143226092bf5STheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, MOPT_SET | MOPT_EXPLICIT}, 143326092bf5STheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, MOPT_CLEAR | MOPT_EXPLICIT}, 143426092bf5STheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, MOPT_SET}, 143526092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 143626092bf5STheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), MOPT_SET}, 143726092bf5STheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_SET}, 143826092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 143926092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 144026092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 144126092bf5STheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_SET}, 144226092bf5STheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_CLEAR}, 144326092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 144426092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 144526092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 144626092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 144726092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 144826092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 144926092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 145026092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 145126092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 145226092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 145326092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 145426092bf5STheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ}, 145526092bf5STheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ}, 145626092bf5STheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ}, 145726092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 145826092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 145926092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 146026092bf5STheodore Ts'o #else 146126092bf5STheodore Ts'o {Opt_user_xattr, 0, MOPT_NOSUPPORT}, 146226092bf5STheodore Ts'o {Opt_nouser_xattr, 0, MOPT_NOSUPPORT}, 146326092bf5STheodore Ts'o #endif 146426092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 146526092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 146626092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 146726092bf5STheodore Ts'o #else 146826092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 146926092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 147026092bf5STheodore Ts'o #endif 147126092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 147226092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 147326092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 147426092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 147526092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 147626092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 147726092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 147826092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 147926092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 148026092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 148126092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 148226092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 148326092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 148426092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 148526092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 148626092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 148726092bf5STheodore Ts'o {Opt_err, 0, 0} 148826092bf5STheodore Ts'o }; 148926092bf5STheodore Ts'o 149026092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 149126092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 149226092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 149326092bf5STheodore Ts'o { 149426092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 149526092bf5STheodore Ts'o const struct mount_opts *m; 149608cefc7aSEric W. Biederman kuid_t uid; 149708cefc7aSEric W. Biederman kgid_t gid; 149826092bf5STheodore Ts'o int arg = 0; 149926092bf5STheodore Ts'o 150057f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 150157f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 150257f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 150357f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 150457f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 150557f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 150657f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 150757f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 150857f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 150957f73c2cSTheodore Ts'o #endif 151026092bf5STheodore Ts'o if (args->from && match_int(args, &arg)) 151126092bf5STheodore Ts'o return -1; 151226092bf5STheodore Ts'o switch (token) { 1513f7048605STheodore Ts'o case Opt_noacl: 1514f7048605STheodore Ts'o case Opt_nouser_xattr: 1515f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1516f7048605STheodore Ts'o break; 151726092bf5STheodore Ts'o case Opt_sb: 151826092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 151926092bf5STheodore Ts'o case Opt_removed: 152026092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 152126092bf5STheodore Ts'o "Ignoring removed %s option", opt); 152226092bf5STheodore Ts'o return 1; 152326092bf5STheodore Ts'o case Opt_resuid: 152408cefc7aSEric W. Biederman uid = make_kuid(current_user_ns(), arg); 152508cefc7aSEric W. Biederman if (!uid_valid(uid)) { 152608cefc7aSEric W. Biederman ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 152708cefc7aSEric W. Biederman return -1; 152808cefc7aSEric W. Biederman } 152908cefc7aSEric W. Biederman sbi->s_resuid = uid; 153026092bf5STheodore Ts'o return 1; 153126092bf5STheodore Ts'o case Opt_resgid: 153208cefc7aSEric W. Biederman gid = make_kgid(current_user_ns(), arg); 153308cefc7aSEric W. Biederman if (!gid_valid(gid)) { 153408cefc7aSEric W. Biederman ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 153508cefc7aSEric W. Biederman return -1; 153608cefc7aSEric W. Biederman } 153708cefc7aSEric W. Biederman sbi->s_resgid = gid; 153826092bf5STheodore Ts'o return 1; 153926092bf5STheodore Ts'o case Opt_abort: 154026092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 154126092bf5STheodore Ts'o return 1; 154226092bf5STheodore Ts'o case Opt_i_version: 154326092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 154426092bf5STheodore Ts'o return 1; 154526092bf5STheodore Ts'o case Opt_journal_dev: 154626092bf5STheodore Ts'o if (is_remount) { 154726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 154826092bf5STheodore Ts'o "Cannot specify journal on remount"); 154926092bf5STheodore Ts'o return -1; 155026092bf5STheodore Ts'o } 155126092bf5STheodore Ts'o *journal_devnum = arg; 155226092bf5STheodore Ts'o return 1; 155326092bf5STheodore Ts'o case Opt_journal_ioprio: 155426092bf5STheodore Ts'o if (arg < 0 || arg > 7) 155526092bf5STheodore Ts'o return -1; 155626092bf5STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 155726092bf5STheodore Ts'o return 1; 155826092bf5STheodore Ts'o } 155926092bf5STheodore Ts'o 156026092bf5STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 156126092bf5STheodore Ts'o if (token != m->token) 156226092bf5STheodore Ts'o continue; 156326092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 156426092bf5STheodore Ts'o return -1; 156526092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 156626092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 156726092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 156826092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 156926092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 157026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 157126092bf5STheodore Ts'o "options when quota turned on"); 157226092bf5STheodore Ts'o return -1; 157326092bf5STheodore Ts'o } 157426092bf5STheodore Ts'o 157526092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 157626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 157726092bf5STheodore Ts'o } else if (token == Opt_commit) { 157826092bf5STheodore Ts'o if (arg == 0) 157926092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 158026092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 158126092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 158226092bf5STheodore Ts'o if (arg == 0) 158326092bf5STheodore Ts'o arg = EXT4_DEF_MAX_BATCH_TIME; 158426092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 158526092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 158626092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 158726092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 158826092bf5STheodore Ts'o if (arg > (1 << 30)) 158926092bf5STheodore Ts'o return -1; 159026092bf5STheodore Ts'o if (arg && !is_power_of_2(arg)) { 159126092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 159226092bf5STheodore Ts'o "EXT4-fs: inode_readahead_blks" 159326092bf5STheodore Ts'o " must be a power of 2"); 159426092bf5STheodore Ts'o return -1; 159526092bf5STheodore Ts'o } 159626092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 159726092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 159826092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 159926092bf5STheodore Ts'o if (!args->from) 160026092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 160126092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 160226092bf5STheodore Ts'o } else if (token == Opt_stripe) { 160326092bf5STheodore Ts'o sbi->s_stripe = arg; 160426092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 160526092bf5STheodore Ts'o if (is_remount) { 160626092bf5STheodore Ts'o if (!sbi->s_journal) 160726092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 160826092bf5STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) != 160926092bf5STheodore Ts'o m->mount_opt) { 161026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 161126092bf5STheodore Ts'o "Cannot change data mode on remount"); 161226092bf5STheodore Ts'o return -1; 161326092bf5STheodore Ts'o } 161426092bf5STheodore Ts'o } else { 161526092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 161626092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 161726092bf5STheodore Ts'o } 161826092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 161926092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 162026092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 162126092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 162226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot " 162326092bf5STheodore Ts'o "change journaled quota options " 162426092bf5STheodore Ts'o "when quota turned on"); 162526092bf5STheodore Ts'o return -1; 162626092bf5STheodore Ts'o } 162726092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 162826092bf5STheodore Ts'o #endif 162926092bf5STheodore Ts'o } else { 163026092bf5STheodore Ts'o if (!args->from) 163126092bf5STheodore Ts'o arg = 1; 163226092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 163326092bf5STheodore Ts'o arg = !arg; 163426092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 163526092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 163626092bf5STheodore Ts'o "buggy handling of option %s", opt); 163726092bf5STheodore Ts'o WARN_ON(1); 163826092bf5STheodore Ts'o return -1; 163926092bf5STheodore Ts'o } 164026092bf5STheodore Ts'o if (arg != 0) 164126092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 164226092bf5STheodore Ts'o else 164326092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 164426092bf5STheodore Ts'o } 164526092bf5STheodore Ts'o return 1; 164626092bf5STheodore Ts'o } 164726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 164826092bf5STheodore Ts'o "or missing value", opt); 164926092bf5STheodore Ts'o return -1; 165026092bf5STheodore Ts'o } 165126092bf5STheodore Ts'o 1652ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1653c3191067STheodore Ts'o unsigned long *journal_devnum, 1654b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1655661aa520SEric Sandeen int is_remount) 1656ac27a0ecSDave Kleikamp { 1657db7e5c66SEldad Zack #ifdef CONFIG_QUOTA 1658617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1659db7e5c66SEldad Zack #endif 1660ac27a0ecSDave Kleikamp char *p; 1661ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 166226092bf5STheodore Ts'o int token; 1663ac27a0ecSDave Kleikamp 1664ac27a0ecSDave Kleikamp if (!options) 1665ac27a0ecSDave Kleikamp return 1; 1666ac27a0ecSDave Kleikamp 1667ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1668ac27a0ecSDave Kleikamp if (!*p) 1669ac27a0ecSDave Kleikamp continue; 167015121c18SEric Sandeen /* 167115121c18SEric Sandeen * Initialize args struct so we know whether arg was 167215121c18SEric Sandeen * found; some options take optional arguments. 167315121c18SEric Sandeen */ 167426092bf5STheodore Ts'o args[0].to = args[0].from = 0; 1675ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 167626092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 167726092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1678ac27a0ecSDave Kleikamp return 0; 1679ac27a0ecSDave Kleikamp } 1680ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1681ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1682482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1683fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1684ac27a0ecSDave Kleikamp 1685482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1686fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1687ac27a0ecSDave Kleikamp 168856c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1689b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1690b31e1552SEric Sandeen "format mixing"); 1691ac27a0ecSDave Kleikamp return 0; 1692ac27a0ecSDave Kleikamp } 1693ac27a0ecSDave Kleikamp 1694ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1695b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1696b31e1552SEric Sandeen "not specified"); 1697ac27a0ecSDave Kleikamp return 0; 1698ac27a0ecSDave Kleikamp } 1699ac27a0ecSDave Kleikamp } else { 1700ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1701b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 17022c8be6b2SJan Kara "specified with no journaling " 1703b31e1552SEric Sandeen "enabled"); 1704ac27a0ecSDave Kleikamp return 0; 1705ac27a0ecSDave Kleikamp } 1706ac27a0ecSDave Kleikamp } 1707ac27a0ecSDave Kleikamp #endif 1708ac27a0ecSDave Kleikamp return 1; 1709ac27a0ecSDave Kleikamp } 1710ac27a0ecSDave Kleikamp 17112adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17122adf6da8STheodore Ts'o struct super_block *sb) 17132adf6da8STheodore Ts'o { 17142adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17152adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17162adf6da8STheodore Ts'o 17172adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17182adf6da8STheodore Ts'o char *fmtname = ""; 17192adf6da8STheodore Ts'o 17202adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17212adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17222adf6da8STheodore Ts'o fmtname = "vfsold"; 17232adf6da8STheodore Ts'o break; 17242adf6da8STheodore Ts'o case QFMT_VFS_V0: 17252adf6da8STheodore Ts'o fmtname = "vfsv0"; 17262adf6da8STheodore Ts'o break; 17272adf6da8STheodore Ts'o case QFMT_VFS_V1: 17282adf6da8STheodore Ts'o fmtname = "vfsv1"; 17292adf6da8STheodore Ts'o break; 17302adf6da8STheodore Ts'o } 17312adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17322adf6da8STheodore Ts'o } 17332adf6da8STheodore Ts'o 17342adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17352adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17362adf6da8STheodore Ts'o 17372adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17382adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17392adf6da8STheodore Ts'o 17402adf6da8STheodore Ts'o if (test_opt(sb, USRQUOTA)) 17412adf6da8STheodore Ts'o seq_puts(seq, ",usrquota"); 17422adf6da8STheodore Ts'o 17432adf6da8STheodore Ts'o if (test_opt(sb, GRPQUOTA)) 17442adf6da8STheodore Ts'o seq_puts(seq, ",grpquota"); 17452adf6da8STheodore Ts'o #endif 17462adf6da8STheodore Ts'o } 17472adf6da8STheodore Ts'o 17485a916be1STheodore Ts'o static const char *token2str(int token) 17495a916be1STheodore Ts'o { 17505a916be1STheodore Ts'o static const struct match_token *t; 17515a916be1STheodore Ts'o 17525a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17535a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17545a916be1STheodore Ts'o break; 17555a916be1STheodore Ts'o return t->pattern; 17565a916be1STheodore Ts'o } 17575a916be1STheodore Ts'o 17582adf6da8STheodore Ts'o /* 17592adf6da8STheodore Ts'o * Show an option if 17602adf6da8STheodore Ts'o * - it's set to a non-default value OR 17612adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17622adf6da8STheodore Ts'o */ 176366acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 176466acdcf4STheodore Ts'o int nodefs) 17652adf6da8STheodore Ts'o { 17662adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17672adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 176866acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17695a916be1STheodore Ts'o const struct mount_opts *m; 177066acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17712adf6da8STheodore Ts'o 177266acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 177366acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17742adf6da8STheodore Ts'o 17752adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17765a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17775a916be1STheodore Ts'o 17785a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17795a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17805a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17815a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17825a916be1STheodore Ts'o continue; 178366acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17845a916be1STheodore Ts'o continue; /* skip if same as the default */ 17855a916be1STheodore Ts'o if ((want_set && 17865a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17875a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17885a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17895a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17905a916be1STheodore Ts'o } 17915a916be1STheodore Ts'o 179208cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17935a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 179408cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 179508cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 179608cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 17975a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 179808cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 179908cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 180066acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 18015a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18025a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18032adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18045a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18052adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18065a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 180766acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18085a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 180966acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18105a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 181166acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18125a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18132adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18145a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 181566acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18165a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 181766acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18182adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18195a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18202adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18215a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18222adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18235a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18245a916be1STheodore Ts'o } 182566acdcf4STheodore Ts'o if (nodefs || 182666acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18275a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18282adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18292adf6da8STheodore Ts'o 183066acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 183166acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18325a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 18332adf6da8STheodore Ts'o 18342adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18352adf6da8STheodore Ts'o return 0; 18362adf6da8STheodore Ts'o } 18372adf6da8STheodore Ts'o 183866acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 183966acdcf4STheodore Ts'o { 184066acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 184166acdcf4STheodore Ts'o } 184266acdcf4STheodore Ts'o 184366acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 184466acdcf4STheodore Ts'o { 184566acdcf4STheodore Ts'o struct super_block *sb = seq->private; 184666acdcf4STheodore Ts'o int rc; 184766acdcf4STheodore Ts'o 184866acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 184966acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 185066acdcf4STheodore Ts'o seq_puts(seq, "\n"); 185166acdcf4STheodore Ts'o return rc; 185266acdcf4STheodore Ts'o } 185366acdcf4STheodore Ts'o 185466acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 185566acdcf4STheodore Ts'o { 185666acdcf4STheodore Ts'o return single_open(file, options_seq_show, PDE(inode)->data); 185766acdcf4STheodore Ts'o } 185866acdcf4STheodore Ts'o 185966acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 186066acdcf4STheodore Ts'o .owner = THIS_MODULE, 186166acdcf4STheodore Ts'o .open = options_open_fs, 186266acdcf4STheodore Ts'o .read = seq_read, 186366acdcf4STheodore Ts'o .llseek = seq_lseek, 186466acdcf4STheodore Ts'o .release = single_release, 186566acdcf4STheodore Ts'o }; 186666acdcf4STheodore Ts'o 1867617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1868ac27a0ecSDave Kleikamp int read_only) 1869ac27a0ecSDave Kleikamp { 1870617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1871ac27a0ecSDave Kleikamp int res = 0; 1872ac27a0ecSDave Kleikamp 1873617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1874b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1875b31e1552SEric Sandeen "forcing read-only mode"); 1876ac27a0ecSDave Kleikamp res = MS_RDONLY; 1877ac27a0ecSDave Kleikamp } 1878ac27a0ecSDave Kleikamp if (read_only) 1879281b5995STheodore Ts'o goto done; 1880617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1881b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1882b31e1552SEric Sandeen "running e2fsck is recommended"); 1883617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1884b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1885b31e1552SEric Sandeen "warning: mounting fs with errors, " 1886b31e1552SEric Sandeen "running e2fsck is recommended"); 1887ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1888ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1889ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1890b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1891b31e1552SEric Sandeen "warning: maximal mount count reached, " 1892b31e1552SEric Sandeen "running e2fsck is recommended"); 1893ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1894ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1895ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1896b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1897b31e1552SEric Sandeen "warning: checktime reached, " 1898b31e1552SEric Sandeen "running e2fsck is recommended"); 18990390131bSFrank Mayhar if (!sbi->s_journal) 1900216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1901ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1902617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1903e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1904ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1905617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19060390131bSFrank Mayhar if (sbi->s_journal) 1907617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1908ac27a0ecSDave Kleikamp 1909e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1910281b5995STheodore Ts'o done: 1911ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1912a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1913a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1914ac27a0ecSDave Kleikamp sb->s_blocksize, 1915ac27a0ecSDave Kleikamp sbi->s_groups_count, 1916617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1917617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1918a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1919ac27a0ecSDave Kleikamp 19207abc52c2SDan Magenheimer cleancache_init_fs(sb); 1921ac27a0ecSDave Kleikamp return res; 1922ac27a0ecSDave Kleikamp } 1923ac27a0ecSDave Kleikamp 1924772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1925772cb7c8SJose R. Santos { 1926772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1927772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1928772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1929772cb7c8SJose R. Santos ext4_group_t flex_group; 1930d50f2ab6SXi Wang unsigned int groups_per_flex = 0; 1931c5ca7c76STheodore Ts'o size_t size; 1932772cb7c8SJose R. Santos int i; 1933772cb7c8SJose R. Santos 1934503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1935d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1936772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1937772cb7c8SJose R. Santos return 1; 1938772cb7c8SJose R. Santos } 1939d50f2ab6SXi Wang groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1940772cb7c8SJose R. Santos 1941c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1942c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1943d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1944d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1945c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 19469933fc0aSTheodore Ts'o sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); 1947c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 19489933fc0aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", 194994de56abSJoe Perches flex_group_count); 1950772cb7c8SJose R. Santos goto failed; 1951772cb7c8SJose R. Santos } 1952772cb7c8SJose R. Santos 1953772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 195488b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1955772cb7c8SJose R. Santos 1956772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19577ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19587ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 1959021b65bbSTheodore Ts'o atomic_add(ext4_free_group_clusters(sb, gdp), 196024aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19617ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19627ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1963772cb7c8SJose R. Santos } 1964772cb7c8SJose R. Santos 1965772cb7c8SJose R. Santos return 1; 1966772cb7c8SJose R. Santos failed: 1967772cb7c8SJose R. Santos return 0; 1968772cb7c8SJose R. Santos } 1969772cb7c8SJose R. Santos 1970feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1971717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1972717d50e4SAndreas Dilger { 1973feb0ab32SDarrick J. Wong int offset; 1974717d50e4SAndreas Dilger __u16 crc = 0; 1975717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1976717d50e4SAndreas Dilger 1977feb0ab32SDarrick J. Wong if ((sbi->s_es->s_feature_ro_compat & 1978feb0ab32SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { 1979feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1980feb0ab32SDarrick J. Wong __u16 old_csum; 1981feb0ab32SDarrick J. Wong __u32 csum32; 1982feb0ab32SDarrick J. Wong 1983feb0ab32SDarrick J. Wong old_csum = gdp->bg_checksum; 1984feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 1985feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 1986feb0ab32SDarrick J. Wong sizeof(le_group)); 1987feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 1988feb0ab32SDarrick J. Wong sbi->s_desc_size); 1989feb0ab32SDarrick J. Wong gdp->bg_checksum = old_csum; 1990feb0ab32SDarrick J. Wong 1991feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 1992feb0ab32SDarrick J. Wong goto out; 1993feb0ab32SDarrick J. Wong } 1994feb0ab32SDarrick J. Wong 1995feb0ab32SDarrick J. Wong /* old crc16 code */ 1996feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 1997feb0ab32SDarrick J. Wong 1998717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1999717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2000717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2001717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2002717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2003717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2004717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2005717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2006717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2007717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2008717d50e4SAndreas Dilger offset); 2009717d50e4SAndreas Dilger 2010feb0ab32SDarrick J. Wong out: 2011717d50e4SAndreas Dilger return cpu_to_le16(crc); 2012717d50e4SAndreas Dilger } 2013717d50e4SAndreas Dilger 2014feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2015717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2016717d50e4SAndreas Dilger { 2017feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2018feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2019feb0ab32SDarrick J. Wong block_group, gdp))) 2020717d50e4SAndreas Dilger return 0; 2021717d50e4SAndreas Dilger 2022717d50e4SAndreas Dilger return 1; 2023717d50e4SAndreas Dilger } 2024717d50e4SAndreas Dilger 2025feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2026feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2027feb0ab32SDarrick J. Wong { 2028feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2029feb0ab32SDarrick J. Wong return; 2030feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2031feb0ab32SDarrick J. Wong } 2032feb0ab32SDarrick J. Wong 2033ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2034bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2035bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2036ac27a0ecSDave Kleikamp { 2037617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2038617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2039617ba13bSMingming Cao ext4_fsblk_t last_block; 2040bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2041bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2042bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2043ce421581SJose R. Santos int flexbg_flag = 0; 2044bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2045ac27a0ecSDave Kleikamp 2046ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2047ce421581SJose R. Santos flexbg_flag = 1; 2048ce421581SJose R. Santos 2049617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2050ac27a0ecSDave Kleikamp 2051197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2052197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2053197cd65aSAkinobu Mita 2054ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2055bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2056ac27a0ecSDave Kleikamp else 2057ac27a0ecSDave Kleikamp last_block = first_block + 2058617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2059ac27a0ecSDave Kleikamp 2060bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2061bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2062bfff6873SLukas Czerner grp = i; 2063bfff6873SLukas Czerner 20648fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20652b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2066b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2067a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2068b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2069ac27a0ecSDave Kleikamp return 0; 2070ac27a0ecSDave Kleikamp } 20718fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20722b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2073b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2074a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2075b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2076ac27a0ecSDave Kleikamp return 0; 2077ac27a0ecSDave Kleikamp } 20788fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2079bd81d8eeSLaurent Vivier if (inode_table < first_block || 20802b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2081b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2082a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2083b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2084ac27a0ecSDave Kleikamp return 0; 2085ac27a0ecSDave Kleikamp } 2086955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2087feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2088b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2089b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2090fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2091fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20927ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2093955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2094717d50e4SAndreas Dilger return 0; 2095717d50e4SAndreas Dilger } 20967ee1ec4cSLi Zefan } 2097955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2098ce421581SJose R. Santos if (!flexbg_flag) 2099617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2100ac27a0ecSDave Kleikamp } 2101bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2102bfff6873SLukas Czerner *first_not_zeroed = grp; 2103ac27a0ecSDave Kleikamp 21045dee5437STheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 21055dee5437STheodore Ts'o EXT4_C2B(sbi, ext4_count_free_clusters(sb))); 2106617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2107ac27a0ecSDave Kleikamp return 1; 2108ac27a0ecSDave Kleikamp } 2109ac27a0ecSDave Kleikamp 2110617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2111ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2112ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2113ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2114ac27a0ecSDave Kleikamp * 2115ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2116ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2117ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2118ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2119ac27a0ecSDave Kleikamp * 2120ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2121ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2122ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2123617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2124ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2125ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2126ac27a0ecSDave Kleikamp */ 2127617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2128617ba13bSMingming Cao struct ext4_super_block *es) 2129ac27a0ecSDave Kleikamp { 2130ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2131ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2132ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2133ac27a0ecSDave Kleikamp int i; 2134ac27a0ecSDave Kleikamp #endif 2135ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2136ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2137ac27a0ecSDave Kleikamp return; 2138ac27a0ecSDave Kleikamp } 2139ac27a0ecSDave Kleikamp 2140a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2141b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2142b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2143a8f48a95SEric Sandeen return; 2144a8f48a95SEric Sandeen } 2145a8f48a95SEric Sandeen 2146d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2147d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2148d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2149d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2150d39195c3SAmir Goldstein return; 2151d39195c3SAmir Goldstein } 2152d39195c3SAmir Goldstein 2153617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2154ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2155ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2156ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2157ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2158ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2159ac27a0ecSDave Kleikamp return; 2160ac27a0ecSDave Kleikamp } 2161ac27a0ecSDave Kleikamp 2162ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2163b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2164ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2165ac27a0ecSDave Kleikamp } 2166ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2167ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2168ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2169ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2170ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2171617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2172617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2173ac27a0ecSDave Kleikamp if (ret < 0) 2174b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2175b31e1552SEric Sandeen "Cannot turn on journaled " 2176b31e1552SEric Sandeen "quota: error %d", ret); 2177ac27a0ecSDave Kleikamp } 2178ac27a0ecSDave Kleikamp } 2179ac27a0ecSDave Kleikamp #endif 2180ac27a0ecSDave Kleikamp 2181ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2182ac27a0ecSDave Kleikamp struct inode *inode; 2183ac27a0ecSDave Kleikamp 218497bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 218597bd42b9SJosef Bacik if (IS_ERR(inode)) { 2186ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2187ac27a0ecSDave Kleikamp break; 2188ac27a0ecSDave Kleikamp } 2189ac27a0ecSDave Kleikamp 2190617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2191871a2931SChristoph Hellwig dquot_initialize(inode); 2192ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2193b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2194b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 219546e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2196e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2197ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2198617ba13bSMingming Cao ext4_truncate(inode); 2199ac27a0ecSDave Kleikamp nr_truncates++; 2200ac27a0ecSDave Kleikamp } else { 2201b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2202b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 220346e665e9SHarvey Harrison __func__, inode->i_ino); 2204ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2205ac27a0ecSDave Kleikamp inode->i_ino); 2206ac27a0ecSDave Kleikamp nr_orphans++; 2207ac27a0ecSDave Kleikamp } 2208ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2209ac27a0ecSDave Kleikamp } 2210ac27a0ecSDave Kleikamp 2211ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2212ac27a0ecSDave Kleikamp 2213ac27a0ecSDave Kleikamp if (nr_orphans) 2214b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2215b31e1552SEric Sandeen PLURAL(nr_orphans)); 2216ac27a0ecSDave Kleikamp if (nr_truncates) 2217b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2218b31e1552SEric Sandeen PLURAL(nr_truncates)); 2219ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2220ac27a0ecSDave Kleikamp /* Turn quotas off */ 2221ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2222ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2223287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2224ac27a0ecSDave Kleikamp } 2225ac27a0ecSDave Kleikamp #endif 2226ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2227ac27a0ecSDave Kleikamp } 22280b8e58a1SAndreas Dilger 2229cd2291a4SEric Sandeen /* 2230cd2291a4SEric Sandeen * Maximal extent format file size. 2231cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2232cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2233cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2234cd2291a4SEric Sandeen * so that won't be a limiting factor. 2235cd2291a4SEric Sandeen * 2236f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2237f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2238f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2239f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2240f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2241f17722f9SLukas Czerner * 2242cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2243cd2291a4SEric Sandeen */ 2244f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2245cd2291a4SEric Sandeen { 2246cd2291a4SEric Sandeen loff_t res; 2247cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2248cd2291a4SEric Sandeen 2249cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2250f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2251cd2291a4SEric Sandeen /* 225290c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2253cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2254cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2255cd2291a4SEric Sandeen */ 2256cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2257cd2291a4SEric Sandeen 2258cd2291a4SEric Sandeen /* total blocks in file system block size */ 2259cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2260cd2291a4SEric Sandeen upper_limit <<= blkbits; 2261cd2291a4SEric Sandeen } 2262cd2291a4SEric Sandeen 2263f17722f9SLukas Czerner /* 2264f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2265f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2266f17722f9SLukas Czerner * size 2267f17722f9SLukas Czerner */ 2268f17722f9SLukas Czerner res = (1LL << 32) - 1; 2269cd2291a4SEric Sandeen res <<= blkbits; 2270cd2291a4SEric Sandeen 2271cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2272cd2291a4SEric Sandeen if (res > upper_limit) 2273cd2291a4SEric Sandeen res = upper_limit; 2274cd2291a4SEric Sandeen 2275cd2291a4SEric Sandeen return res; 2276cd2291a4SEric Sandeen } 2277ac27a0ecSDave Kleikamp 2278ac27a0ecSDave Kleikamp /* 2279cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22800fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22810fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2282ac27a0ecSDave Kleikamp */ 2283f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2284ac27a0ecSDave Kleikamp { 2285617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22860fc1b451SAneesh Kumar K.V int meta_blocks; 22870fc1b451SAneesh Kumar K.V loff_t upper_limit; 22880b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22890b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22900b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22910b8e58a1SAndreas Dilger * 22920b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22930b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 22940fc1b451SAneesh Kumar K.V */ 22950fc1b451SAneesh Kumar K.V 2296f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 22970fc1b451SAneesh Kumar K.V /* 229890c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 22990b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23000b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23010fc1b451SAneesh Kumar K.V */ 23020fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23030fc1b451SAneesh Kumar K.V 23040fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23050fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23060fc1b451SAneesh Kumar K.V 23070fc1b451SAneesh Kumar K.V } else { 23088180a562SAneesh Kumar K.V /* 23098180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23108180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23118180a562SAneesh Kumar K.V * represent total number of blocks in 23128180a562SAneesh Kumar K.V * file system block size 23138180a562SAneesh Kumar K.V */ 23140fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23150fc1b451SAneesh Kumar K.V 23160fc1b451SAneesh Kumar K.V } 23170fc1b451SAneesh Kumar K.V 23180fc1b451SAneesh Kumar K.V /* indirect blocks */ 23190fc1b451SAneesh Kumar K.V meta_blocks = 1; 23200fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23210fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23220fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23230fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23240fc1b451SAneesh Kumar K.V 23250fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23260fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2327ac27a0ecSDave Kleikamp 2328ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2329ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2330ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2331ac27a0ecSDave Kleikamp res <<= bits; 2332ac27a0ecSDave Kleikamp if (res > upper_limit) 2333ac27a0ecSDave Kleikamp res = upper_limit; 23340fc1b451SAneesh Kumar K.V 23350fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23360fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23370fc1b451SAneesh Kumar K.V 2338ac27a0ecSDave Kleikamp return res; 2339ac27a0ecSDave Kleikamp } 2340ac27a0ecSDave Kleikamp 2341617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 234270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2343ac27a0ecSDave Kleikamp { 2344617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2345fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2346ac27a0ecSDave Kleikamp int has_super = 0; 2347ac27a0ecSDave Kleikamp 2348ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2349ac27a0ecSDave Kleikamp 2350617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2351ac27a0ecSDave Kleikamp nr < first_meta_bg) 235270bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2353ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2354617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2355ac27a0ecSDave Kleikamp has_super = 1; 23560b8e58a1SAndreas Dilger 2357617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2358ac27a0ecSDave Kleikamp } 2359ac27a0ecSDave Kleikamp 2360c9de560dSAlex Tomas /** 2361c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2362c9de560dSAlex Tomas * @sbi: In memory super block info 2363c9de560dSAlex Tomas * 2364c9de560dSAlex Tomas * If we have specified it via mount option, then 2365c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2366c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2367c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2368c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2369c9de560dSAlex Tomas * 2370c9de560dSAlex Tomas */ 2371c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2372c9de560dSAlex Tomas { 2373c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2374c9de560dSAlex Tomas unsigned long stripe_width = 2375c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 23763eb08658SDan Ehrenberg int ret; 2377c9de560dSAlex Tomas 2378c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 23793eb08658SDan Ehrenberg ret = sbi->s_stripe; 23803eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 23813eb08658SDan Ehrenberg ret = stripe_width; 23823eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 23833eb08658SDan Ehrenberg ret = stride; 23843eb08658SDan Ehrenberg else 23853eb08658SDan Ehrenberg ret = 0; 2386c9de560dSAlex Tomas 23873eb08658SDan Ehrenberg /* 23883eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 23893eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 23903eb08658SDan Ehrenberg */ 23913eb08658SDan Ehrenberg if (ret <= 1) 23923eb08658SDan Ehrenberg ret = 0; 2393c9de560dSAlex Tomas 23943eb08658SDan Ehrenberg return ret; 2395c9de560dSAlex Tomas } 2396ac27a0ecSDave Kleikamp 23973197ebdbSTheodore Ts'o /* sysfs supprt */ 23983197ebdbSTheodore Ts'o 23993197ebdbSTheodore Ts'o struct ext4_attr { 24003197ebdbSTheodore Ts'o struct attribute attr; 24013197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24023197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24033197ebdbSTheodore Ts'o const char *, size_t); 24043197ebdbSTheodore Ts'o int offset; 24053197ebdbSTheodore Ts'o }; 24063197ebdbSTheodore Ts'o 24073197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 24083197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 24093197ebdbSTheodore Ts'o { 24103197ebdbSTheodore Ts'o char *endp; 24113197ebdbSTheodore Ts'o 2412e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2413e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 24143197ebdbSTheodore Ts'o if (*endp || *value > max) 24153197ebdbSTheodore Ts'o return -EINVAL; 24163197ebdbSTheodore Ts'o 24173197ebdbSTheodore Ts'o return 0; 24183197ebdbSTheodore Ts'o } 24193197ebdbSTheodore Ts'o 24203197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24213197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24223197ebdbSTheodore Ts'o char *buf) 24233197ebdbSTheodore Ts'o { 24243197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24257b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24267b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24273197ebdbSTheodore Ts'o } 24283197ebdbSTheodore Ts'o 24293197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24303197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24313197ebdbSTheodore Ts'o { 24323197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24333197ebdbSTheodore Ts'o 2434f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2435f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24363197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24373197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24383197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24393197ebdbSTheodore Ts'o } 24403197ebdbSTheodore Ts'o 24413197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24423197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24433197ebdbSTheodore Ts'o { 24443197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24453197ebdbSTheodore Ts'o 2446f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2447f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24483197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2449a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24503197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2451a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24523197ebdbSTheodore Ts'o } 24533197ebdbSTheodore Ts'o 24543197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24553197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24563197ebdbSTheodore Ts'o const char *buf, size_t count) 24573197ebdbSTheodore Ts'o { 24583197ebdbSTheodore Ts'o unsigned long t; 24593197ebdbSTheodore Ts'o 24603197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 24613197ebdbSTheodore Ts'o return -EINVAL; 24623197ebdbSTheodore Ts'o 24635dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 24643197ebdbSTheodore Ts'o return -EINVAL; 24653197ebdbSTheodore Ts'o 24663197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24673197ebdbSTheodore Ts'o return count; 24683197ebdbSTheodore Ts'o } 24693197ebdbSTheodore Ts'o 24703197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24713197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24723197ebdbSTheodore Ts'o { 24733197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24743197ebdbSTheodore Ts'o 24753197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24763197ebdbSTheodore Ts'o } 24773197ebdbSTheodore Ts'o 24783197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 24793197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24803197ebdbSTheodore Ts'o const char *buf, size_t count) 24813197ebdbSTheodore Ts'o { 24823197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24833197ebdbSTheodore Ts'o unsigned long t; 24843197ebdbSTheodore Ts'o 24853197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24863197ebdbSTheodore Ts'o return -EINVAL; 24873197ebdbSTheodore Ts'o *ui = t; 24883197ebdbSTheodore Ts'o return count; 24893197ebdbSTheodore Ts'o } 24903197ebdbSTheodore Ts'o 24912c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 24922c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 24932c0544b2STheodore Ts'o const char *buf, size_t count) 24942c0544b2STheodore Ts'o { 24952c0544b2STheodore Ts'o int len = count; 24962c0544b2STheodore Ts'o 24972c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 24982c0544b2STheodore Ts'o return -EPERM; 24992c0544b2STheodore Ts'o 25002c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25012c0544b2STheodore Ts'o len--; 25022c0544b2STheodore Ts'o 25032c0544b2STheodore Ts'o if (len) 25042c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25052c0544b2STheodore Ts'o return count; 25062c0544b2STheodore Ts'o } 25072c0544b2STheodore Ts'o 25083197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25093197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25103197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25113197ebdbSTheodore Ts'o .show = _show, \ 25123197ebdbSTheodore Ts'o .store = _store, \ 25133197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 25143197ebdbSTheodore Ts'o } 25153197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25163197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 25173197ebdbSTheodore Ts'o 2518857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 25193197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 25203197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 25213197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 25223197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 25233197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 25243197ebdbSTheodore Ts'o 25253197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 25263197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 25273197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 25283197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 25293197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 253011013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 25313197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 25323197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 25333197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 25343197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 25353197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 25363197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 253755138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 25382c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 25393197ebdbSTheodore Ts'o 25403197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 25413197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 25423197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 25433197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 25443197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 254511013911SAndreas Dilger ATTR_LIST(inode_goal), 25463197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 25473197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 25483197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 25493197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 25503197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 25513197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 255255138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 25532c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 25543197ebdbSTheodore Ts'o NULL, 25553197ebdbSTheodore Ts'o }; 25563197ebdbSTheodore Ts'o 2557857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2558857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 255927ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2560857ac889SLukas Czerner 2561857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2562857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 256327ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2564857ac889SLukas Czerner NULL, 2565857ac889SLukas Czerner }; 2566857ac889SLukas Czerner 25673197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 25683197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 25693197ebdbSTheodore Ts'o { 25703197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25713197ebdbSTheodore Ts'o s_kobj); 25723197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25733197ebdbSTheodore Ts'o 25743197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 25753197ebdbSTheodore Ts'o } 25763197ebdbSTheodore Ts'o 25773197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 25783197ebdbSTheodore Ts'o struct attribute *attr, 25793197ebdbSTheodore Ts'o const char *buf, size_t len) 25803197ebdbSTheodore Ts'o { 25813197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25823197ebdbSTheodore Ts'o s_kobj); 25833197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25843197ebdbSTheodore Ts'o 25853197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 25863197ebdbSTheodore Ts'o } 25873197ebdbSTheodore Ts'o 25883197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 25893197ebdbSTheodore Ts'o { 25903197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25913197ebdbSTheodore Ts'o s_kobj); 25923197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 25933197ebdbSTheodore Ts'o } 25943197ebdbSTheodore Ts'o 259552cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 25963197ebdbSTheodore Ts'o .show = ext4_attr_show, 25973197ebdbSTheodore Ts'o .store = ext4_attr_store, 25983197ebdbSTheodore Ts'o }; 25993197ebdbSTheodore Ts'o 26003197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 26013197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 26023197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 26033197ebdbSTheodore Ts'o .release = ext4_sb_release, 26043197ebdbSTheodore Ts'o }; 26053197ebdbSTheodore Ts'o 2606857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2607857ac889SLukas Czerner { 2608857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2609857ac889SLukas Czerner } 2610857ac889SLukas Czerner 2611857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2612857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2613857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2614857ac889SLukas Czerner .release = ext4_feat_release, 2615857ac889SLukas Czerner }; 2616857ac889SLukas Czerner 2617a13fb1a4SEric Sandeen /* 2618a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2619a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2620a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2621a13fb1a4SEric Sandeen * 0 if it cannot be. 2622a13fb1a4SEric Sandeen */ 2623a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2624a13fb1a4SEric Sandeen { 2625a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2626a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2627a13fb1a4SEric Sandeen "Couldn't mount because of " 2628a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2629a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2630a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2631a13fb1a4SEric Sandeen return 0; 2632a13fb1a4SEric Sandeen } 2633a13fb1a4SEric Sandeen 2634a13fb1a4SEric Sandeen if (readonly) 2635a13fb1a4SEric Sandeen return 1; 2636a13fb1a4SEric Sandeen 2637a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2638a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2639a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2640a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2641a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2642a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2643a13fb1a4SEric Sandeen return 0; 2644a13fb1a4SEric Sandeen } 2645a13fb1a4SEric Sandeen /* 2646a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2647a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2648a13fb1a4SEric Sandeen */ 2649a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2650a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2651a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2652a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2653a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2654a13fb1a4SEric Sandeen return 0; 2655a13fb1a4SEric Sandeen } 2656a13fb1a4SEric Sandeen } 2657bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2658bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2659bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2660bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2661bab08ab9STheodore Ts'o "extents feature\n"); 2662bab08ab9STheodore Ts'o return 0; 2663bab08ab9STheodore Ts'o } 2664a13fb1a4SEric Sandeen return 1; 2665a13fb1a4SEric Sandeen } 2666a13fb1a4SEric Sandeen 266766e61a9eSTheodore Ts'o /* 266866e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 266966e61a9eSTheodore Ts'o * on the file system 267066e61a9eSTheodore Ts'o */ 267166e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 267266e61a9eSTheodore Ts'o { 267366e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 267466e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 267566e61a9eSTheodore Ts'o struct ext4_super_block *es; 267666e61a9eSTheodore Ts'o 267766e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 267866e61a9eSTheodore Ts'o es = sbi->s_es; 267966e61a9eSTheodore Ts'o 268066e61a9eSTheodore Ts'o if (es->s_error_count) 268166e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 268266e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 268366e61a9eSTheodore Ts'o if (es->s_first_error_time) { 268466e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 268566e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 268666e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 268766e61a9eSTheodore Ts'o es->s_first_error_func, 268866e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 268966e61a9eSTheodore Ts'o if (es->s_first_error_ino) 269066e61a9eSTheodore Ts'o printk(": inode %u", 269166e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 269266e61a9eSTheodore Ts'o if (es->s_first_error_block) 269366e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 269466e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 269566e61a9eSTheodore Ts'o printk("\n"); 269666e61a9eSTheodore Ts'o } 269766e61a9eSTheodore Ts'o if (es->s_last_error_time) { 269866e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 269966e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 270066e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 270166e61a9eSTheodore Ts'o es->s_last_error_func, 270266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 270366e61a9eSTheodore Ts'o if (es->s_last_error_ino) 270466e61a9eSTheodore Ts'o printk(": inode %u", 270566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 270666e61a9eSTheodore Ts'o if (es->s_last_error_block) 270766e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 270866e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 270966e61a9eSTheodore Ts'o printk("\n"); 271066e61a9eSTheodore Ts'o } 271166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 271266e61a9eSTheodore Ts'o } 271366e61a9eSTheodore Ts'o 2714bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2715bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2716bfff6873SLukas Czerner { 2717bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2718bfff6873SLukas Czerner ext4_group_t group, ngroups; 2719bfff6873SLukas Czerner struct super_block *sb; 2720bfff6873SLukas Czerner unsigned long timeout = 0; 2721bfff6873SLukas Czerner int ret = 0; 2722bfff6873SLukas Czerner 2723bfff6873SLukas Czerner sb = elr->lr_super; 2724bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2725bfff6873SLukas Czerner 2726bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2727bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2728bfff6873SLukas Czerner if (!gdp) { 2729bfff6873SLukas Czerner ret = 1; 2730bfff6873SLukas Czerner break; 2731bfff6873SLukas Czerner } 2732bfff6873SLukas Czerner 2733bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2734bfff6873SLukas Czerner break; 2735bfff6873SLukas Czerner } 2736bfff6873SLukas Czerner 2737bfff6873SLukas Czerner if (group == ngroups) 2738bfff6873SLukas Czerner ret = 1; 2739bfff6873SLukas Czerner 2740bfff6873SLukas Czerner if (!ret) { 2741bfff6873SLukas Czerner timeout = jiffies; 2742bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2743bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2744bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 274551ce6511SLukas Czerner timeout = (jiffies - timeout) * 274651ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2747bfff6873SLukas Czerner elr->lr_timeout = timeout; 2748bfff6873SLukas Czerner } 2749bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2750bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2751bfff6873SLukas Czerner } 2752bfff6873SLukas Czerner 2753bfff6873SLukas Czerner return ret; 2754bfff6873SLukas Czerner } 2755bfff6873SLukas Czerner 2756bfff6873SLukas Czerner /* 2757bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 27584ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2759bfff6873SLukas Czerner */ 2760bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2761bfff6873SLukas Czerner { 2762bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2763bfff6873SLukas Czerner 2764bfff6873SLukas Czerner if (!elr) 2765bfff6873SLukas Czerner return; 2766bfff6873SLukas Czerner 2767bfff6873SLukas Czerner sbi = elr->lr_sbi; 2768bfff6873SLukas Czerner 2769bfff6873SLukas Czerner list_del(&elr->lr_request); 2770bfff6873SLukas Czerner sbi->s_li_request = NULL; 2771bfff6873SLukas Czerner kfree(elr); 2772bfff6873SLukas Czerner } 2773bfff6873SLukas Czerner 2774bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2775bfff6873SLukas Czerner { 27761bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 27771bb933fbSLukas Czerner if (!ext4_li_info) { 27781bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2779bfff6873SLukas Czerner return; 27801bb933fbSLukas Czerner } 2781bfff6873SLukas Czerner 2782bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 27831bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2784bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 27851bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2786bfff6873SLukas Czerner } 2787bfff6873SLukas Czerner 27888f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 27898f1f7453SEric Sandeen 2790bfff6873SLukas Czerner /* 2791bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2792bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2793bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2794bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2795bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2796bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2797bfff6873SLukas Czerner * next waking time and put itself into sleep. 2798bfff6873SLukas Czerner */ 2799bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2800bfff6873SLukas Czerner { 2801bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2802bfff6873SLukas Czerner struct list_head *pos, *n; 2803bfff6873SLukas Czerner struct ext4_li_request *elr; 28044ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2805bfff6873SLukas Czerner 2806bfff6873SLukas Czerner BUG_ON(NULL == eli); 2807bfff6873SLukas Czerner 2808bfff6873SLukas Czerner cont_thread: 2809bfff6873SLukas Czerner while (true) { 2810bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2811bfff6873SLukas Czerner 2812bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2813bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2814bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2815bfff6873SLukas Czerner goto exit_thread; 2816bfff6873SLukas Czerner } 2817bfff6873SLukas Czerner 2818bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2819bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2820bfff6873SLukas Czerner lr_request); 2821bfff6873SLukas Czerner 2822b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2823b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2824b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2825bfff6873SLukas Czerner ext4_remove_li_request(elr); 2826bfff6873SLukas Czerner continue; 2827bfff6873SLukas Czerner } 2828b2c78cd0STheodore Ts'o } 2829bfff6873SLukas Czerner 2830bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2831bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2832bfff6873SLukas Czerner } 2833bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2834bfff6873SLukas Czerner 2835a0acae0eSTejun Heo try_to_freeze(); 2836bfff6873SLukas Czerner 28374ed5c033SLukas Czerner cur = jiffies; 28384ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2839f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2840bfff6873SLukas Czerner cond_resched(); 2841bfff6873SLukas Czerner continue; 2842bfff6873SLukas Czerner } 2843bfff6873SLukas Czerner 28444ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 28454ed5c033SLukas Czerner 28468f1f7453SEric Sandeen if (kthread_should_stop()) { 28478f1f7453SEric Sandeen ext4_clear_request_list(); 28488f1f7453SEric Sandeen goto exit_thread; 28498f1f7453SEric Sandeen } 2850bfff6873SLukas Czerner } 2851bfff6873SLukas Czerner 2852bfff6873SLukas Czerner exit_thread: 2853bfff6873SLukas Czerner /* 2854bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2855bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2856bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2857bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2858bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2859bfff6873SLukas Czerner * new one. 2860bfff6873SLukas Czerner */ 2861bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2862bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2863bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2864bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2865bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2866bfff6873SLukas Czerner goto cont_thread; 2867bfff6873SLukas Czerner } 2868bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2869bfff6873SLukas Czerner kfree(ext4_li_info); 2870bfff6873SLukas Czerner ext4_li_info = NULL; 2871bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2872bfff6873SLukas Czerner 2873bfff6873SLukas Czerner return 0; 2874bfff6873SLukas Czerner } 2875bfff6873SLukas Czerner 2876bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2877bfff6873SLukas Czerner { 2878bfff6873SLukas Czerner struct list_head *pos, *n; 2879bfff6873SLukas Czerner struct ext4_li_request *elr; 2880bfff6873SLukas Czerner 2881bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2882bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2883bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2884bfff6873SLukas Czerner lr_request); 2885bfff6873SLukas Czerner ext4_remove_li_request(elr); 2886bfff6873SLukas Czerner } 2887bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2888bfff6873SLukas Czerner } 2889bfff6873SLukas Czerner 2890bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2891bfff6873SLukas Czerner { 28928f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 28938f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 28948f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 28958f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2896bfff6873SLukas Czerner ext4_clear_request_list(); 2897bfff6873SLukas Czerner kfree(ext4_li_info); 2898bfff6873SLukas Czerner ext4_li_info = NULL; 289992b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2900bfff6873SLukas Czerner "initialization thread\n", 2901bfff6873SLukas Czerner err); 2902bfff6873SLukas Czerner return err; 2903bfff6873SLukas Czerner } 2904bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2905bfff6873SLukas Czerner return 0; 2906bfff6873SLukas Czerner } 2907bfff6873SLukas Czerner 2908bfff6873SLukas Czerner /* 2909bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2910bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2911bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2912bfff6873SLukas Czerner * groups and return total number of groups. 2913bfff6873SLukas Czerner */ 2914bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2915bfff6873SLukas Czerner { 2916bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2917bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2918bfff6873SLukas Czerner 2919bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2920bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2921bfff6873SLukas Czerner if (!gdp) 2922bfff6873SLukas Czerner continue; 2923bfff6873SLukas Czerner 2924bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2925bfff6873SLukas Czerner break; 2926bfff6873SLukas Czerner } 2927bfff6873SLukas Czerner 2928bfff6873SLukas Czerner return group; 2929bfff6873SLukas Czerner } 2930bfff6873SLukas Czerner 2931bfff6873SLukas Czerner static int ext4_li_info_new(void) 2932bfff6873SLukas Czerner { 2933bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2934bfff6873SLukas Czerner 2935bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2936bfff6873SLukas Czerner if (!eli) 2937bfff6873SLukas Czerner return -ENOMEM; 2938bfff6873SLukas Czerner 2939bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2940bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2941bfff6873SLukas Czerner 2942bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2943bfff6873SLukas Czerner 2944bfff6873SLukas Czerner ext4_li_info = eli; 2945bfff6873SLukas Czerner 2946bfff6873SLukas Czerner return 0; 2947bfff6873SLukas Czerner } 2948bfff6873SLukas Czerner 2949bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2950bfff6873SLukas Czerner ext4_group_t start) 2951bfff6873SLukas Czerner { 2952bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2953bfff6873SLukas Czerner struct ext4_li_request *elr; 2954bfff6873SLukas Czerner unsigned long rnd; 2955bfff6873SLukas Czerner 2956bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2957bfff6873SLukas Czerner if (!elr) 2958bfff6873SLukas Czerner return NULL; 2959bfff6873SLukas Czerner 2960bfff6873SLukas Czerner elr->lr_super = sb; 2961bfff6873SLukas Czerner elr->lr_sbi = sbi; 2962bfff6873SLukas Czerner elr->lr_next_group = start; 2963bfff6873SLukas Czerner 2964bfff6873SLukas Czerner /* 2965bfff6873SLukas Czerner * Randomize first schedule time of the request to 2966bfff6873SLukas Czerner * spread the inode table initialization requests 2967bfff6873SLukas Czerner * better. 2968bfff6873SLukas Czerner */ 2969bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2970bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2971bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2972bfff6873SLukas Czerner 2973bfff6873SLukas Czerner return elr; 2974bfff6873SLukas Czerner } 2975bfff6873SLukas Czerner 2976bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 2977bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2978bfff6873SLukas Czerner { 2979bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2980bfff6873SLukas Czerner struct ext4_li_request *elr; 2981bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 29826c5a6cb9SAndrew Morton int ret = 0; 2983bfff6873SLukas Czerner 298451ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 298551ce6511SLukas Czerner /* 298651ce6511SLukas Czerner * Reset timeout so it can be computed again, because 298751ce6511SLukas Czerner * s_li_wait_mult might have changed. 298851ce6511SLukas Czerner */ 298951ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 2990beed5ecbSNicolas Kaiser return 0; 299151ce6511SLukas Czerner } 2992bfff6873SLukas Czerner 2993bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2994bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 299555ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 2996beed5ecbSNicolas Kaiser return 0; 2997bfff6873SLukas Czerner 2998bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 2999beed5ecbSNicolas Kaiser if (!elr) 3000beed5ecbSNicolas Kaiser return -ENOMEM; 3001bfff6873SLukas Czerner 3002bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3003bfff6873SLukas Czerner 3004bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3005bfff6873SLukas Czerner ret = ext4_li_info_new(); 3006bfff6873SLukas Czerner if (ret) 3007bfff6873SLukas Czerner goto out; 3008bfff6873SLukas Czerner } 3009bfff6873SLukas Czerner 3010bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3011bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3012bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3013bfff6873SLukas Czerner 3014bfff6873SLukas Czerner sbi->s_li_request = elr; 301546e4690bSTao Ma /* 301646e4690bSTao Ma * set elr to NULL here since it has been inserted to 301746e4690bSTao Ma * the request_list and the removal and free of it is 301846e4690bSTao Ma * handled by ext4_clear_request_list from now on. 301946e4690bSTao Ma */ 302046e4690bSTao Ma elr = NULL; 3021bfff6873SLukas Czerner 3022bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3023bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3024bfff6873SLukas Czerner if (ret) 3025bfff6873SLukas Czerner goto out; 3026bfff6873SLukas Czerner } 3027bfff6873SLukas Czerner out: 3028bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3029beed5ecbSNicolas Kaiser if (ret) 3030bfff6873SLukas Czerner kfree(elr); 3031bfff6873SLukas Czerner return ret; 3032bfff6873SLukas Czerner } 3033bfff6873SLukas Czerner 3034bfff6873SLukas Czerner /* 3035bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3036bfff6873SLukas Czerner * module unload. 3037bfff6873SLukas Czerner */ 3038bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3039bfff6873SLukas Czerner { 3040bfff6873SLukas Czerner /* 3041bfff6873SLukas Czerner * If thread exited earlier 3042bfff6873SLukas Czerner * there's nothing to be done. 3043bfff6873SLukas Czerner */ 30448f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3045bfff6873SLukas Czerner return; 3046bfff6873SLukas Czerner 30478f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3048bfff6873SLukas Czerner } 3049bfff6873SLukas Czerner 305025ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 305125ed6e8aSDarrick J. Wong { 305225ed6e8aSDarrick J. Wong int ret = 1; 305325ed6e8aSDarrick J. Wong int compat, incompat; 305425ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 305525ed6e8aSDarrick J. Wong 305625ed6e8aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 305725ed6e8aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 305825ed6e8aSDarrick J. Wong /* journal checksum v2 */ 305925ed6e8aSDarrick J. Wong compat = 0; 306025ed6e8aSDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V2; 306125ed6e8aSDarrick J. Wong } else { 306225ed6e8aSDarrick J. Wong /* journal checksum v1 */ 306325ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 306425ed6e8aSDarrick J. Wong incompat = 0; 306525ed6e8aSDarrick J. Wong } 306625ed6e8aSDarrick J. Wong 306725ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 306825ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 306925ed6e8aSDarrick J. Wong compat, 0, 307025ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 307125ed6e8aSDarrick J. Wong incompat); 307225ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 307325ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 307425ed6e8aSDarrick J. Wong compat, 0, 307525ed6e8aSDarrick J. Wong incompat); 307625ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 307725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 307825ed6e8aSDarrick J. Wong } else { 307925ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 308025ed6e8aSDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 308125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 308225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 308325ed6e8aSDarrick J. Wong } 308425ed6e8aSDarrick J. Wong 308525ed6e8aSDarrick J. Wong return ret; 308625ed6e8aSDarrick J. Wong } 308725ed6e8aSDarrick J. Wong 3088*952fc18eSTheodore Ts'o /* 3089*952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3090*952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3091*952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3092*952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3093*952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3094*952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3095*952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3096*952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3097*952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3098*952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3099*952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3100*952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3101*952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3102*952fc18eSTheodore Ts'o */ 3103*952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3104*952fc18eSTheodore Ts'o char *buf) 3105*952fc18eSTheodore Ts'o { 3106*952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3107*952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3108*952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3109*952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3110*952fc18eSTheodore Ts'o int s, j, count = 0; 3111*952fc18eSTheodore Ts'o 3112*952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3113*952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3114*952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3115*952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3116*952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3117*952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3118*952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3119*952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3120*952fc18eSTheodore Ts'o count++; 3121*952fc18eSTheodore Ts'o } 3122*952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3123*952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3124*952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3125*952fc18eSTheodore Ts'o count++; 3126*952fc18eSTheodore Ts'o } 3127*952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3128*952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3129*952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3130*952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3131*952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3132*952fc18eSTheodore Ts'o count++; 3133*952fc18eSTheodore Ts'o } 3134*952fc18eSTheodore Ts'o if (i != grp) 3135*952fc18eSTheodore Ts'o continue; 3136*952fc18eSTheodore Ts'o s = 0; 3137*952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3138*952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3139*952fc18eSTheodore Ts'o count++; 3140*952fc18eSTheodore Ts'o } 3141*952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3142*952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3143*952fc18eSTheodore Ts'o count++; 3144*952fc18eSTheodore Ts'o } 3145*952fc18eSTheodore Ts'o } 3146*952fc18eSTheodore Ts'o if (!count) 3147*952fc18eSTheodore Ts'o return 0; 3148*952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3149*952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3150*952fc18eSTheodore Ts'o } 3151*952fc18eSTheodore Ts'o 3152*952fc18eSTheodore Ts'o /* 3153*952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3154*952fc18eSTheodore Ts'o */ 3155*952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3156*952fc18eSTheodore Ts'o { 3157*952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3158*952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3159*952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3160*952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3161*952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3162*952fc18eSTheodore Ts'o 3163*952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3164*952fc18eSTheodore Ts'o if (!buf) 3165*952fc18eSTheodore Ts'o return -ENOMEM; 3166*952fc18eSTheodore Ts'o 3167*952fc18eSTheodore Ts'o /* 3168*952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3169*952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3170*952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3171*952fc18eSTheodore Ts'o */ 3172*952fc18eSTheodore Ts'o 3173*952fc18eSTheodore Ts'o /* 3174*952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3175*952fc18eSTheodore Ts'o */ 3176*952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3177*952fc18eSTheodore Ts'o 3178*952fc18eSTheodore Ts'o /* 3179*952fc18eSTheodore Ts'o * Add the overhead found in each block group 3180*952fc18eSTheodore Ts'o */ 3181*952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3182*952fc18eSTheodore Ts'o int blks; 3183*952fc18eSTheodore Ts'o 3184*952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3185*952fc18eSTheodore Ts'o overhead += blks; 3186*952fc18eSTheodore Ts'o if (blks) 3187*952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3188*952fc18eSTheodore Ts'o cond_resched(); 3189*952fc18eSTheodore Ts'o } 3190*952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3191*952fc18eSTheodore Ts'o smp_wmb(); 3192*952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3193*952fc18eSTheodore Ts'o return 0; 3194*952fc18eSTheodore Ts'o } 3195*952fc18eSTheodore Ts'o 3196617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3197ac27a0ecSDave Kleikamp { 3198d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3199ac27a0ecSDave Kleikamp struct buffer_head *bh; 3200617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3201617ba13bSMingming Cao struct ext4_sb_info *sbi; 3202617ba13bSMingming Cao ext4_fsblk_t block; 3203617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 320470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3205ac27a0ecSDave Kleikamp unsigned long offset = 0; 3206ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3207ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3208ac27a0ecSDave Kleikamp struct inode *root; 32099f6200bbSTheodore Ts'o char *cp; 32100390131bSFrank Mayhar const char *descr; 3211dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3212281b5995STheodore Ts'o int blocksize, clustersize; 32134ec11028STheodore Ts'o unsigned int db_count; 32144ec11028STheodore Ts'o unsigned int i; 3215281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3216bd81d8eeSLaurent Vivier __u64 blocks_count; 3217833f4077SPeter Zijlstra int err; 3218b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3219bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3220ac27a0ecSDave Kleikamp 3221ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3222ac27a0ecSDave Kleikamp if (!sbi) 3223dcc7dae3SCyrill Gorcunov goto out_free_orig; 3224705895b6SPekka Enberg 3225705895b6SPekka Enberg sbi->s_blockgroup_lock = 3226705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3227705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3228705895b6SPekka Enberg kfree(sbi); 3229dcc7dae3SCyrill Gorcunov goto out_free_orig; 3230705895b6SPekka Enberg } 3231ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 32322c0544b2STheodore Ts'o sbi->s_sb = sb; 3233ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 323408cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, EXT4_DEF_RESUID); 323508cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, EXT4_DEF_RESGID); 3236240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3237d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3238f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3239f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3240f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3241ac27a0ecSDave Kleikamp 32429f6200bbSTheodore Ts'o /* Cleanup superblock name */ 32439f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 32449f6200bbSTheodore Ts'o *cp = '!'; 32459f6200bbSTheodore Ts'o 3246dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3247617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3248ac27a0ecSDave Kleikamp if (!blocksize) { 3249b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3250ac27a0ecSDave Kleikamp goto out_fail; 3251ac27a0ecSDave Kleikamp } 3252ac27a0ecSDave Kleikamp 3253ac27a0ecSDave Kleikamp /* 3254617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3255ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3256ac27a0ecSDave Kleikamp */ 3257617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 325870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 325970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3260ac27a0ecSDave Kleikamp } else { 326170bbb3e0SAndrew Morton logical_sb_block = sb_block; 3262ac27a0ecSDave Kleikamp } 3263ac27a0ecSDave Kleikamp 326470bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3265b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3266ac27a0ecSDave Kleikamp goto out_fail; 3267ac27a0ecSDave Kleikamp } 3268ac27a0ecSDave Kleikamp /* 3269ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3270617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3271ac27a0ecSDave Kleikamp */ 32722716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3273ac27a0ecSDave Kleikamp sbi->s_es = es; 3274ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3275617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3276617ba13bSMingming Cao goto cantfind_ext4; 3277afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3278ac27a0ecSDave Kleikamp 3279feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3280feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3281feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3282feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3283feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3284feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3285feb0ab32SDarrick J. Wong 3286d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3287d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3288d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3289d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3290d25425f8SDarrick J. Wong silent = 1; 3291d25425f8SDarrick J. Wong goto cantfind_ext4; 3292d25425f8SDarrick J. Wong } 3293d25425f8SDarrick J. Wong 32940441984aSDarrick J. Wong /* Load the checksum driver */ 32950441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 32960441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 32970441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 32980441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 32990441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 33000441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 33010441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 33020441984aSDarrick J. Wong goto failed_mount; 33030441984aSDarrick J. Wong } 33040441984aSDarrick J. Wong } 33050441984aSDarrick J. Wong 3306a9c47317SDarrick J. Wong /* Check superblock checksum */ 3307a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3308a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3309a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3310a9c47317SDarrick J. Wong silent = 1; 3311a9c47317SDarrick J. Wong goto cantfind_ext4; 3312a9c47317SDarrick J. Wong } 3313a9c47317SDarrick J. Wong 3314a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3315a9c47317SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3316a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 3317a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3318a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3319a9c47317SDarrick J. Wong 3320ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3321ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3322fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3323617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3324fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 332587f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3326fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3327617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3328fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3329ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 333003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3331fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 33322e7842b8SHugh Dickins #endif 333303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3334fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 33352e7842b8SHugh Dickins #endif 33366fd7a467STheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 3337617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3338fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3339617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3340fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3341617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3342fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3343ac27a0ecSDave Kleikamp 3344617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3345fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3346bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3347fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3348bb4f397aSAneesh Kumar K.V else 3349fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 33508b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3351fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 33528b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3353fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3354ac27a0ecSDave Kleikamp 335508cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 335608cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 335730773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 335830773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 335930773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3360ac27a0ecSDave Kleikamp 33618b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3362fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3363ac27a0ecSDave Kleikamp 33641e2462f9SMingming Cao /* 3365dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3366dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3367dd919b98SAneesh Kumar K.V */ 33688b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 33698b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3370fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3371dd919b98SAneesh Kumar K.V 337251ce6511SLukas Czerner /* 337351ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 337451ce6511SLukas Czerner * no mount option specified. 337551ce6511SLukas Czerner */ 337651ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 337751ce6511SLukas Czerner 33788b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3379661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 33808b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 33818b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 33828b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 33838b67f04aSTheodore Ts'o } 33845a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3385b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3386661aa520SEric Sandeen &journal_ioprio, 0)) 3387ac27a0ecSDave Kleikamp goto failed_mount; 3388ac27a0ecSDave Kleikamp 338956889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 339056889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 339156889787STheodore Ts'o "with data=journal disables delayed " 339256889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 339356889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 339456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 339556889787STheodore Ts'o "both data=journal and delalloc"); 339656889787STheodore Ts'o goto failed_mount; 339756889787STheodore Ts'o } 339856889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 339956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 340056889787STheodore Ts'o "both data=journal and delalloc"); 340156889787STheodore Ts'o goto failed_mount; 340256889787STheodore Ts'o } 340356889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 340456889787STheodore Ts'o clear_opt(sb, DELALLOC); 340556889787STheodore Ts'o } 340656889787STheodore Ts'o 340756889787STheodore Ts'o blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 340856889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 340956889787STheodore Ts'o if (blocksize < PAGE_SIZE) { 341056889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 341156889787STheodore Ts'o "dioread_nolock if block size != PAGE_SIZE"); 341256889787STheodore Ts'o goto failed_mount; 341356889787STheodore Ts'o } 341456889787STheodore Ts'o } 341556889787STheodore Ts'o 3416ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3417482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3418ac27a0ecSDave Kleikamp 3419617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3420617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3421617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3422617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3423b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3424b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3425b31e1552SEric Sandeen "running e2fsck is recommended"); 3426469108ffSTheodore Tso 34272035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 34282035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 34292035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 34302035e776STheodore Ts'o "using the ext4 subsystem"); 34312035e776STheodore Ts'o else { 34322035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 34332035e776STheodore Ts'o "to feature incompatibilities"); 34342035e776STheodore Ts'o goto failed_mount; 34352035e776STheodore Ts'o } 34362035e776STheodore Ts'o } 34372035e776STheodore Ts'o 34382035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 34392035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 34402035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 34412035e776STheodore Ts'o "using the ext4 subsystem"); 34422035e776STheodore Ts'o else { 34432035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 34442035e776STheodore Ts'o "to feature incompatibilities"); 34452035e776STheodore Ts'o goto failed_mount; 34462035e776STheodore Ts'o } 34472035e776STheodore Ts'o } 34482035e776STheodore Ts'o 3449469108ffSTheodore Tso /* 3450ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3451ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3452ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3453ac27a0ecSDave Kleikamp */ 3454a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3455ac27a0ecSDave Kleikamp goto failed_mount; 3456a13fb1a4SEric Sandeen 3457617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3458617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3459b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3460b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3461ac27a0ecSDave Kleikamp goto failed_mount; 3462ac27a0ecSDave Kleikamp } 3463ac27a0ecSDave Kleikamp 3464ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3465ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3466ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3467b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3468ce40733cSAneesh Kumar K.V blocksize); 3469ac27a0ecSDave Kleikamp goto failed_mount; 3470ac27a0ecSDave Kleikamp } 3471ac27a0ecSDave Kleikamp 3472ac27a0ecSDave Kleikamp brelse(bh); 347370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 347470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 347570bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3476ac27a0ecSDave Kleikamp if (!bh) { 3477b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3478b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3479ac27a0ecSDave Kleikamp goto failed_mount; 3480ac27a0ecSDave Kleikamp } 34812716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3482ac27a0ecSDave Kleikamp sbi->s_es = es; 3483617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3484b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3485b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3486ac27a0ecSDave Kleikamp goto failed_mount; 3487ac27a0ecSDave Kleikamp } 3488ac27a0ecSDave Kleikamp } 3489ac27a0ecSDave Kleikamp 3490a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3491a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3492f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3493f287a1a5STheodore Ts'o has_huge_files); 3494f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3495ac27a0ecSDave Kleikamp 3496617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3497617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3498617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3499ac27a0ecSDave Kleikamp } else { 3500ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3501ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3502617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 35031330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3504ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3505b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3506b31e1552SEric Sandeen "unsupported inode size: %d", 3507ac27a0ecSDave Kleikamp sbi->s_inode_size); 3508ac27a0ecSDave Kleikamp goto failed_mount; 3509ac27a0ecSDave Kleikamp } 3510ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3511ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3512ac27a0ecSDave Kleikamp } 35130b8e58a1SAndreas Dilger 35140d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 35150d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 35168fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 35170d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3518d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3519b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3520b31e1552SEric Sandeen "unsupported descriptor size %lu", 35210d1ee42fSAlexandre Ratchov sbi->s_desc_size); 35220d1ee42fSAlexandre Ratchov goto failed_mount; 35230d1ee42fSAlexandre Ratchov } 35240d1ee42fSAlexandre Ratchov } else 35250d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 35260b8e58a1SAndreas Dilger 3527ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3528ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3529b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3530617ba13bSMingming Cao goto cantfind_ext4; 35310b8e58a1SAndreas Dilger 3532617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3533ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3534617ba13bSMingming Cao goto cantfind_ext4; 3535ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3536ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 35370d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3538ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3539ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3540e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3541e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 35420b8e58a1SAndreas Dilger 3543ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3544ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3545ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3546f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3547f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3548f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3549f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3550f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3551f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3552f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3553f99b2589STheodore Ts'o #else 3554f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3555f99b2589STheodore Ts'o #endif 3556f99b2589STheodore Ts'o } 3557ac27a0ecSDave Kleikamp 3558281b5995STheodore Ts'o /* Handle clustersize */ 3559281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3560281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3561281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3562281b5995STheodore Ts'o if (has_bigalloc) { 3563281b5995STheodore Ts'o if (clustersize < blocksize) { 3564281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3565281b5995STheodore Ts'o "cluster size (%d) smaller than " 3566281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3567281b5995STheodore Ts'o goto failed_mount; 3568281b5995STheodore Ts'o } 3569281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3570281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3571281b5995STheodore Ts'o sbi->s_clusters_per_group = 3572281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3573281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3574281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3575281b5995STheodore Ts'o "#clusters per group too big: %lu", 3576281b5995STheodore Ts'o sbi->s_clusters_per_group); 3577281b5995STheodore Ts'o goto failed_mount; 3578281b5995STheodore Ts'o } 3579281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3580281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3581281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3582281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3583281b5995STheodore Ts'o sbi->s_blocks_per_group, 3584281b5995STheodore Ts'o sbi->s_clusters_per_group); 3585281b5995STheodore Ts'o goto failed_mount; 3586281b5995STheodore Ts'o } 3587281b5995STheodore Ts'o } else { 3588281b5995STheodore Ts'o if (clustersize != blocksize) { 3589281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3590281b5995STheodore Ts'o "block size (%d)", clustersize, 3591281b5995STheodore Ts'o blocksize); 3592281b5995STheodore Ts'o clustersize = blocksize; 3593281b5995STheodore Ts'o } 3594ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3595b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3596b31e1552SEric Sandeen "#blocks per group too big: %lu", 3597ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3598ac27a0ecSDave Kleikamp goto failed_mount; 3599ac27a0ecSDave Kleikamp } 3600281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3601281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3602281b5995STheodore Ts'o } 3603281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3604281b5995STheodore Ts'o 3605ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3606b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3607b31e1552SEric Sandeen "#inodes per group too big: %lu", 3608ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3609ac27a0ecSDave Kleikamp goto failed_mount; 3610ac27a0ecSDave Kleikamp } 3611ac27a0ecSDave Kleikamp 3612bf43d84bSEric Sandeen /* 3613bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3614bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3615bf43d84bSEric Sandeen */ 36165a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 361730ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 36185a9ae68aSDarrick J. Wong if (err) { 3619b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3620bf43d84bSEric Sandeen " too large to mount safely on this system"); 3621ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 362290c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 36235a9ae68aSDarrick J. Wong ret = err; 3624ac27a0ecSDave Kleikamp goto failed_mount; 3625ac27a0ecSDave Kleikamp } 3626ac27a0ecSDave Kleikamp 3627617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3628617ba13bSMingming Cao goto cantfind_ext4; 3629e7c95593SEric Sandeen 36300f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 36310f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 36320f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3633b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3634b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 36350f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 36360f2ddca6SFrom: Thiemo Nagel goto failed_mount; 36370f2ddca6SFrom: Thiemo Nagel } 36380f2ddca6SFrom: Thiemo Nagel 36394ec11028STheodore Ts'o /* 36404ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 36414ec11028STheodore Ts'o * of the filesystem. 36424ec11028STheodore Ts'o */ 36434ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3644b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3645b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3646e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 36474ec11028STheodore Ts'o ext4_blocks_count(es)); 3648e7c95593SEric Sandeen goto failed_mount; 3649e7c95593SEric Sandeen } 3650bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3651bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3652bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3653bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 36544ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3655b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 36564ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3657b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 36584ec11028STheodore Ts'o ext4_blocks_count(es), 36594ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 36604ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 36614ec11028STheodore Ts'o goto failed_mount; 36624ec11028STheodore Ts'o } 3663bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3664fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3665fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3666617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3667617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3668f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3669f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3670ac27a0ecSDave Kleikamp GFP_KERNEL); 3671ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3672b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 36732cde417dSTheodore Ts'o ret = -ENOMEM; 3674ac27a0ecSDave Kleikamp goto failed_mount; 3675ac27a0ecSDave Kleikamp } 3676ac27a0ecSDave Kleikamp 36779f6200bbSTheodore Ts'o if (ext4_proc_root) 36789f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3679240799cdSTheodore Ts'o 368066acdcf4STheodore Ts'o if (sbi->s_proc) 368166acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 368266acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 368366acdcf4STheodore Ts'o 3684705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3685ac27a0ecSDave Kleikamp 3686ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 368770bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3688ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3689ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3690b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3691b31e1552SEric Sandeen "can't read group descriptor %d", i); 3692ac27a0ecSDave Kleikamp db_count = i; 3693ac27a0ecSDave Kleikamp goto failed_mount2; 3694ac27a0ecSDave Kleikamp } 3695ac27a0ecSDave Kleikamp } 3696bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3697b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3698ac27a0ecSDave Kleikamp goto failed_mount2; 3699ac27a0ecSDave Kleikamp } 3700772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3701772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3702b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3703b31e1552SEric Sandeen "unable to initialize " 3704b31e1552SEric Sandeen "flex_bg meta info!"); 3705772cb7c8SJose R. Santos goto failed_mount2; 3706772cb7c8SJose R. Santos } 3707772cb7c8SJose R. Santos 3708ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3709ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3710ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3711ac27a0ecSDave Kleikamp 371204496411STao Ma init_timer(&sbi->s_err_report); 371304496411STao Ma sbi->s_err_report.function = print_daily_error_info; 371404496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 371504496411STao Ma 371657042651STheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, 37175dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3718ce7e010aSTheodore Ts'o if (!err) { 3719ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3720ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3721ce7e010aSTheodore Ts'o } 3722ce7e010aSTheodore Ts'o if (!err) { 3723ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3724ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3725ce7e010aSTheodore Ts'o } 3726ce7e010aSTheodore Ts'o if (!err) { 372757042651STheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 3728ce7e010aSTheodore Ts'o } 3729ce7e010aSTheodore Ts'o if (err) { 3730ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 37312cde417dSTheodore Ts'o ret = err; 3732ce7e010aSTheodore Ts'o goto failed_mount3; 3733ce7e010aSTheodore Ts'o } 3734ce7e010aSTheodore Ts'o 3735c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 373655138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3737c9de560dSAlex Tomas 3738ac27a0ecSDave Kleikamp /* 3739ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3740ac27a0ecSDave Kleikamp */ 37419ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 37429ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3743617ba13bSMingming Cao sb->s_op = &ext4_sops; 37449ca92389STheodore Ts'o else 37459ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3746617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3747617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3748ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3749617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3750617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3751ac27a0ecSDave Kleikamp #endif 3752f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3753f2fa2ffcSAneesh Kumar K.V 3754ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 37553b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 37568f82f840SYongqiang Yang sbi->s_resize_flags = 0; 3757ac27a0ecSDave Kleikamp 3758ac27a0ecSDave Kleikamp sb->s_root = NULL; 3759ac27a0ecSDave Kleikamp 3760ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3761617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3762617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3763ac27a0ecSDave Kleikamp 3764c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3765c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3766c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3767c5e06d10SJohann Lombardi goto failed_mount3; 3768c5e06d10SJohann Lombardi 3769ac27a0ecSDave Kleikamp /* 3770ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3771ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3772ac27a0ecSDave Kleikamp */ 3773ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3774617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3775617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3776ac27a0ecSDave Kleikamp goto failed_mount3; 37770390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 37780390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3779b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3780b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3781744692dcSJiaying Zhang goto failed_mount_wq; 3782ac27a0ecSDave Kleikamp } else { 3783fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 37840390131bSFrank Mayhar sbi->s_journal = NULL; 37850390131bSFrank Mayhar needs_recovery = 0; 37860390131bSFrank Mayhar goto no_journal; 3787ac27a0ecSDave Kleikamp } 3788ac27a0ecSDave Kleikamp 3789f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3790eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3791eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3792b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3793744692dcSJiaying Zhang goto failed_mount_wq; 3794eb40a09cSJose R. Santos } 3795eb40a09cSJose R. Santos 379625ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 379725ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 379825ed6e8aSDarrick J. Wong "feature set"); 379925ed6e8aSDarrick J. Wong goto failed_mount_wq; 3800d4da6c9cSLinus Torvalds } 3801818d276cSGirish Shilamkar 3802ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3803ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3804ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3805ac27a0ecSDave Kleikamp case 0: 3806ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 380763f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 380863f57933SAndrew Morton * cope, else JOURNAL_DATA 380963f57933SAndrew Morton */ 3810dab291afSMingming Cao if (jbd2_journal_check_available_features 3811dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3812fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3813ac27a0ecSDave Kleikamp else 3814fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3815ac27a0ecSDave Kleikamp break; 3816ac27a0ecSDave Kleikamp 3817617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3818617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3819dab291afSMingming Cao if (!jbd2_journal_check_available_features 3820dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3821b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3822b31e1552SEric Sandeen "requested data journaling mode"); 3823744692dcSJiaying Zhang goto failed_mount_wq; 3824ac27a0ecSDave Kleikamp } 3825ac27a0ecSDave Kleikamp default: 3826ac27a0ecSDave Kleikamp break; 3827ac27a0ecSDave Kleikamp } 3828b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3829ac27a0ecSDave Kleikamp 383018aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 383118aadd47SBobi Jam 3832ce7e010aSTheodore Ts'o /* 3833ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3834ce7e010aSTheodore Ts'o * need to update the global counters. 3835ce7e010aSTheodore Ts'o */ 383657042651STheodore Ts'o percpu_counter_set(&sbi->s_freeclusters_counter, 38375dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3838ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 383984061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3840ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 384184061e07SDmitry Monakhov ext4_count_dirs(sb)); 384257042651STheodore Ts'o percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); 3843206f7ab4SChristoph Hellwig 3844ce7e010aSTheodore Ts'o no_journal: 3845fd89d5f2STejun Heo /* 3846*952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 3847*952fc18eSTheodore Ts'o * superblock if present. 3848*952fc18eSTheodore Ts'o */ 3849*952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 3850*952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 3851*952fc18eSTheodore Ts'o else { 3852*952fc18eSTheodore Ts'o ret = ext4_calculate_overhead(sb); 3853*952fc18eSTheodore Ts'o if (ret) 3854*952fc18eSTheodore Ts'o goto failed_mount_wq; 3855*952fc18eSTheodore Ts'o } 3856*952fc18eSTheodore Ts'o 3857*952fc18eSTheodore Ts'o /* 3858fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3859fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3860fd89d5f2STejun Heo */ 3861fd89d5f2STejun Heo EXT4_SB(sb)->dio_unwritten_wq = 3862ae005cbeSLinus Torvalds alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 38634c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 38644c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 38654c0425ffSMingming Cao goto failed_mount_wq; 38664c0425ffSMingming Cao } 38674c0425ffSMingming Cao 3868ac27a0ecSDave Kleikamp /* 3869dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3870ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3871ac27a0ecSDave Kleikamp */ 3872ac27a0ecSDave Kleikamp 38731d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 38741d1fe1eeSDavid Howells if (IS_ERR(root)) { 3875b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 38761d1fe1eeSDavid Howells ret = PTR_ERR(root); 387732a9bb57SManish Katiyar root = NULL; 3878ac27a0ecSDave Kleikamp goto failed_mount4; 3879ac27a0ecSDave Kleikamp } 3880ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3881b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 388294bf608aSAl Viro iput(root); 3883ac27a0ecSDave Kleikamp goto failed_mount4; 3884ac27a0ecSDave Kleikamp } 388548fde701SAl Viro sb->s_root = d_make_root(root); 38861d1fe1eeSDavid Howells if (!sb->s_root) { 3887b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 38881d1fe1eeSDavid Howells ret = -ENOMEM; 38891d1fe1eeSDavid Howells goto failed_mount4; 38901d1fe1eeSDavid Howells } 3891ac27a0ecSDave Kleikamp 38927e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 38937e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 3894ef7f3835SKalpak Shah 3895ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3896ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3897ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3898ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3899ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3900ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3901ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3902ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3903ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3904ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3905ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3906ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3907ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3908ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3909ef7f3835SKalpak Shah } 3910ef7f3835SKalpak Shah } 3911ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3912ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3913ef7f3835SKalpak Shah sbi->s_inode_size) { 3914ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3915ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3916b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3917b31e1552SEric Sandeen "available"); 3918ef7f3835SKalpak Shah } 3919ef7f3835SKalpak Shah 39206fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 39216fd058f7STheodore Ts'o if (err) { 3922b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3923fbe845ddSCurt Wohlgemuth "zone (%d)", err); 392494bf608aSAl Viro goto failed_mount4a; 39256fd058f7STheodore Ts'o } 39266fd058f7STheodore Ts'o 3927c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 39289d99012fSAkira Fujita err = ext4_mb_init(sb); 3929c2774d84SAneesh Kumar K.V if (err) { 3930421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3931c2774d84SAneesh Kumar K.V err); 3932dcf2d804STao Ma goto failed_mount5; 3933c2774d84SAneesh Kumar K.V } 3934c2774d84SAneesh Kumar K.V 3935bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3936bfff6873SLukas Czerner if (err) 3937dcf2d804STao Ma goto failed_mount6; 3938bfff6873SLukas Czerner 39393197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 39403197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 39413197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 39423197ebdbSTheodore Ts'o "%s", sb->s_id); 3943dcf2d804STao Ma if (err) 3944dcf2d804STao Ma goto failed_mount7; 39453197ebdbSTheodore Ts'o 3946617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3947617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3948617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 39490390131bSFrank Mayhar if (needs_recovery) { 3950b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3951617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 39520390131bSFrank Mayhar } 39530390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 39540390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 39550390131bSFrank Mayhar descr = " journalled data mode"; 39560390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 39570390131bSFrank Mayhar descr = " ordered data mode"; 39580390131bSFrank Mayhar else 39590390131bSFrank Mayhar descr = " writeback data mode"; 39600390131bSFrank Mayhar } else 39610390131bSFrank Mayhar descr = "out journal"; 39620390131bSFrank Mayhar 3963d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 39648b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 39658b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3966ac27a0ecSDave Kleikamp 396766e61a9eSTheodore Ts'o if (es->s_error_count) 396866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3969ac27a0ecSDave Kleikamp 3970d4c402d9SCurt Wohlgemuth kfree(orig_data); 3971ac27a0ecSDave Kleikamp return 0; 3972ac27a0ecSDave Kleikamp 3973617ba13bSMingming Cao cantfind_ext4: 3974ac27a0ecSDave Kleikamp if (!silent) 3975b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3976ac27a0ecSDave Kleikamp goto failed_mount; 3977ac27a0ecSDave Kleikamp 3978dcf2d804STao Ma failed_mount7: 3979dcf2d804STao Ma ext4_unregister_li_request(sb); 3980dcf2d804STao Ma failed_mount6: 3981dcf2d804STao Ma ext4_mb_release(sb); 398294bf608aSAl Viro failed_mount5: 398394bf608aSAl Viro ext4_ext_release(sb); 3984dcf2d804STao Ma ext4_release_system_zone(sb); 398594bf608aSAl Viro failed_mount4a: 398694bf608aSAl Viro dput(sb->s_root); 398732a9bb57SManish Katiyar sb->s_root = NULL; 398894bf608aSAl Viro failed_mount4: 3989b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 39904c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 39914c0425ffSMingming Cao failed_mount_wq: 39920390131bSFrank Mayhar if (sbi->s_journal) { 3993dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 399447b4a50bSJan Kara sbi->s_journal = NULL; 39950390131bSFrank Mayhar } 3996ac27a0ecSDave Kleikamp failed_mount3: 399704496411STao Ma del_timer(&sbi->s_err_report); 39989933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 39999933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 400057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4001ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4002ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 400357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 4004c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4005c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4006ac27a0ecSDave Kleikamp failed_mount2: 4007ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4008ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4009f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4010ac27a0ecSDave Kleikamp failed_mount: 40110441984aSDarrick J. Wong if (sbi->s_chksum_driver) 40120441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4013240799cdSTheodore Ts'o if (sbi->s_proc) { 401466acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 40159f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4016240799cdSTheodore Ts'o } 4017ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4018ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4019ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4020ac27a0ecSDave Kleikamp #endif 4021617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4022ac27a0ecSDave Kleikamp brelse(bh); 4023ac27a0ecSDave Kleikamp out_fail: 4024ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4025f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4026ac27a0ecSDave Kleikamp kfree(sbi); 4027dcc7dae3SCyrill Gorcunov out_free_orig: 4028d4c402d9SCurt Wohlgemuth kfree(orig_data); 40291d1fe1eeSDavid Howells return ret; 4030ac27a0ecSDave Kleikamp } 4031ac27a0ecSDave Kleikamp 4032ac27a0ecSDave Kleikamp /* 4033ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4034ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4035ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4036ac27a0ecSDave Kleikamp */ 4037617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4038ac27a0ecSDave Kleikamp { 4039617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4040ac27a0ecSDave Kleikamp 4041ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 404230773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 404330773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4044ac27a0ecSDave Kleikamp 4045a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4046ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4047dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4048ac27a0ecSDave Kleikamp else 4049dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 40505bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 40515bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 40525bf5683aSHidehiro Kawai else 40535bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4054a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4055ac27a0ecSDave Kleikamp } 4056ac27a0ecSDave Kleikamp 4057617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4058ac27a0ecSDave Kleikamp unsigned int journal_inum) 4059ac27a0ecSDave Kleikamp { 4060ac27a0ecSDave Kleikamp struct inode *journal_inode; 4061ac27a0ecSDave Kleikamp journal_t *journal; 4062ac27a0ecSDave Kleikamp 40630390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 40640390131bSFrank Mayhar 4065ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4066ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4067ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4068ac27a0ecSDave Kleikamp 40691d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 40701d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4071b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4072ac27a0ecSDave Kleikamp return NULL; 4073ac27a0ecSDave Kleikamp } 4074ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4075ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4076ac27a0ecSDave Kleikamp iput(journal_inode); 4077b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4078ac27a0ecSDave Kleikamp return NULL; 4079ac27a0ecSDave Kleikamp } 4080ac27a0ecSDave Kleikamp 4081e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4082ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 40831d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4084b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4085ac27a0ecSDave Kleikamp iput(journal_inode); 4086ac27a0ecSDave Kleikamp return NULL; 4087ac27a0ecSDave Kleikamp } 4088ac27a0ecSDave Kleikamp 4089dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4090ac27a0ecSDave Kleikamp if (!journal) { 4091b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4092ac27a0ecSDave Kleikamp iput(journal_inode); 4093ac27a0ecSDave Kleikamp return NULL; 4094ac27a0ecSDave Kleikamp } 4095ac27a0ecSDave Kleikamp journal->j_private = sb; 4096617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4097ac27a0ecSDave Kleikamp return journal; 4098ac27a0ecSDave Kleikamp } 4099ac27a0ecSDave Kleikamp 4100617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4101ac27a0ecSDave Kleikamp dev_t j_dev) 4102ac27a0ecSDave Kleikamp { 4103ac27a0ecSDave Kleikamp struct buffer_head *bh; 4104ac27a0ecSDave Kleikamp journal_t *journal; 4105617ba13bSMingming Cao ext4_fsblk_t start; 4106617ba13bSMingming Cao ext4_fsblk_t len; 4107ac27a0ecSDave Kleikamp int hblock, blocksize; 4108617ba13bSMingming Cao ext4_fsblk_t sb_block; 4109ac27a0ecSDave Kleikamp unsigned long offset; 4110617ba13bSMingming Cao struct ext4_super_block *es; 4111ac27a0ecSDave Kleikamp struct block_device *bdev; 4112ac27a0ecSDave Kleikamp 41130390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41140390131bSFrank Mayhar 4115b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4116ac27a0ecSDave Kleikamp if (bdev == NULL) 4117ac27a0ecSDave Kleikamp return NULL; 4118ac27a0ecSDave Kleikamp 4119ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4120e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4121ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4122b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4123b31e1552SEric Sandeen "blocksize too small for journal device"); 4124ac27a0ecSDave Kleikamp goto out_bdev; 4125ac27a0ecSDave Kleikamp } 4126ac27a0ecSDave Kleikamp 4127617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4128617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4129ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4130ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4131b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4132b31e1552SEric Sandeen "external journal"); 4133ac27a0ecSDave Kleikamp goto out_bdev; 4134ac27a0ecSDave Kleikamp } 4135ac27a0ecSDave Kleikamp 41362716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4137617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4138ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4139617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4140b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4141b31e1552SEric Sandeen "bad superblock"); 4142ac27a0ecSDave Kleikamp brelse(bh); 4143ac27a0ecSDave Kleikamp goto out_bdev; 4144ac27a0ecSDave Kleikamp } 4145ac27a0ecSDave Kleikamp 4146617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4147b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4148ac27a0ecSDave Kleikamp brelse(bh); 4149ac27a0ecSDave Kleikamp goto out_bdev; 4150ac27a0ecSDave Kleikamp } 4151ac27a0ecSDave Kleikamp 4152bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4153ac27a0ecSDave Kleikamp start = sb_block + 1; 4154ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4155ac27a0ecSDave Kleikamp 4156dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4157ac27a0ecSDave Kleikamp start, len, blocksize); 4158ac27a0ecSDave Kleikamp if (!journal) { 4159b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4160ac27a0ecSDave Kleikamp goto out_bdev; 4161ac27a0ecSDave Kleikamp } 4162ac27a0ecSDave Kleikamp journal->j_private = sb; 4163ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 4164ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4165ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4166b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4167ac27a0ecSDave Kleikamp goto out_journal; 4168ac27a0ecSDave Kleikamp } 4169ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4170b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4171b31e1552SEric Sandeen "user (unsupported) - %d", 4172ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4173ac27a0ecSDave Kleikamp goto out_journal; 4174ac27a0ecSDave Kleikamp } 4175617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4176617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4177ac27a0ecSDave Kleikamp return journal; 41780b8e58a1SAndreas Dilger 4179ac27a0ecSDave Kleikamp out_journal: 4180dab291afSMingming Cao jbd2_journal_destroy(journal); 4181ac27a0ecSDave Kleikamp out_bdev: 4182617ba13bSMingming Cao ext4_blkdev_put(bdev); 4183ac27a0ecSDave Kleikamp return NULL; 4184ac27a0ecSDave Kleikamp } 4185ac27a0ecSDave Kleikamp 4186617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4187617ba13bSMingming Cao struct ext4_super_block *es, 4188ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4189ac27a0ecSDave Kleikamp { 4190ac27a0ecSDave Kleikamp journal_t *journal; 4191ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4192ac27a0ecSDave Kleikamp dev_t journal_dev; 4193ac27a0ecSDave Kleikamp int err = 0; 4194ac27a0ecSDave Kleikamp int really_read_only; 4195ac27a0ecSDave Kleikamp 41960390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41970390131bSFrank Mayhar 4198ac27a0ecSDave Kleikamp if (journal_devnum && 4199ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4200b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4201b31e1552SEric Sandeen "numbers have changed"); 4202ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4203ac27a0ecSDave Kleikamp } else 4204ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4205ac27a0ecSDave Kleikamp 4206ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4207ac27a0ecSDave Kleikamp 4208ac27a0ecSDave Kleikamp /* 4209ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4210ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4211ac27a0ecSDave Kleikamp * can get read-write access to the device. 4212ac27a0ecSDave Kleikamp */ 4213617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4214ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4215b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4216b31e1552SEric Sandeen "required on readonly filesystem"); 4217ac27a0ecSDave Kleikamp if (really_read_only) { 4218b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4219b31e1552SEric Sandeen "unavailable, cannot proceed"); 4220ac27a0ecSDave Kleikamp return -EROFS; 4221ac27a0ecSDave Kleikamp } 4222b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4223b31e1552SEric Sandeen "be enabled during recovery"); 4224ac27a0ecSDave Kleikamp } 4225ac27a0ecSDave Kleikamp } 4226ac27a0ecSDave Kleikamp 4227ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4228b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4229b31e1552SEric Sandeen "and inode journals!"); 4230ac27a0ecSDave Kleikamp return -EINVAL; 4231ac27a0ecSDave Kleikamp } 4232ac27a0ecSDave Kleikamp 4233ac27a0ecSDave Kleikamp if (journal_inum) { 4234617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4235ac27a0ecSDave Kleikamp return -EINVAL; 4236ac27a0ecSDave Kleikamp } else { 4237617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4238ac27a0ecSDave Kleikamp return -EINVAL; 4239ac27a0ecSDave Kleikamp } 4240ac27a0ecSDave Kleikamp 424190576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4242b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 42434776004fSTheodore Ts'o 4244617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4245dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 42461c13d5c0STheodore Ts'o if (!err) { 42471c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 42481c13d5c0STheodore Ts'o if (save) 42491c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 42501c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4251dab291afSMingming Cao err = jbd2_journal_load(journal); 42521c13d5c0STheodore Ts'o if (save) 42531c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 42541c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 42551c13d5c0STheodore Ts'o kfree(save); 42561c13d5c0STheodore Ts'o } 4257ac27a0ecSDave Kleikamp 4258ac27a0ecSDave Kleikamp if (err) { 4259b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4260dab291afSMingming Cao jbd2_journal_destroy(journal); 4261ac27a0ecSDave Kleikamp return err; 4262ac27a0ecSDave Kleikamp } 4263ac27a0ecSDave Kleikamp 4264617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4265617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4266ac27a0ecSDave Kleikamp 4267c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4268ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4269ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4270ac27a0ecSDave Kleikamp 4271ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4272e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4273ac27a0ecSDave Kleikamp } 4274ac27a0ecSDave Kleikamp 4275ac27a0ecSDave Kleikamp return 0; 4276ac27a0ecSDave Kleikamp } 4277ac27a0ecSDave Kleikamp 4278e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4279ac27a0ecSDave Kleikamp { 4280e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4281617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4282c4be0c1dSTakashi Sato int error = 0; 4283ac27a0ecSDave Kleikamp 42847c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4285c4be0c1dSTakashi Sato return error; 4286914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4287914258bfSTheodore Ts'o /* 4288914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4289914258bfSTheodore Ts'o * superblock failed. This could happen because the 4290914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4291914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4292914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4293914258bfSTheodore Ts'o * write and hope for the best. 4294914258bfSTheodore Ts'o */ 4295b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4296b31e1552SEric Sandeen "superblock detected"); 4297914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4298914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4299914258bfSTheodore Ts'o } 430071290b36STheodore Ts'o /* 430171290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 430271290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 430371290b36STheodore Ts'o * write time when we are mounting the root file system 430471290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 430571290b36STheodore Ts'o * for people who are east of GMT and who make their clock 430671290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 430771290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 430871290b36STheodore Ts'o * to complain and force a full file system check. 430971290b36STheodore Ts'o */ 431071290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4311ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4312f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4313afc32f7eSTheodore Ts'o es->s_kbytes_written = 4314afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4315afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4316afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4317f613dfcbSTheodore Ts'o else 4318f613dfcbSTheodore Ts'o es->s_kbytes_written = 4319f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 432057042651STheodore Ts'o ext4_free_blocks_count_set(es, 432157042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 432257042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 43237f93cff9STheodore Ts'o es->s_free_inodes_count = 43247f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 43255d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 43267234ab2aSTheodore Ts'o sb->s_dirt = 0; 4327ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 4328a9c47317SDarrick J. Wong ext4_superblock_csum_set(sb, es); 4329ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4330914258bfSTheodore Ts'o if (sync) { 4331c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4332c4be0c1dSTakashi Sato if (error) 4333c4be0c1dSTakashi Sato return error; 4334c4be0c1dSTakashi Sato 4335c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4336c4be0c1dSTakashi Sato if (error) { 4337b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4338b31e1552SEric Sandeen "superblock"); 4339914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4340914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4341914258bfSTheodore Ts'o } 4342914258bfSTheodore Ts'o } 4343c4be0c1dSTakashi Sato return error; 4344ac27a0ecSDave Kleikamp } 4345ac27a0ecSDave Kleikamp 4346ac27a0ecSDave Kleikamp /* 4347ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4348ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4349ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4350ac27a0ecSDave Kleikamp */ 4351617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4352617ba13bSMingming Cao struct ext4_super_block *es) 4353ac27a0ecSDave Kleikamp { 4354617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4355ac27a0ecSDave Kleikamp 43560390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 43570390131bSFrank Mayhar BUG_ON(journal != NULL); 43580390131bSFrank Mayhar return; 43590390131bSFrank Mayhar } 4360dab291afSMingming Cao jbd2_journal_lock_updates(journal); 43617ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 43627ffe1ea8SHidehiro Kawai goto out; 43637ffe1ea8SHidehiro Kawai 4364617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4365ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4366617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4367e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4368ac27a0ecSDave Kleikamp } 43697ffe1ea8SHidehiro Kawai 43707ffe1ea8SHidehiro Kawai out: 4371dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4372ac27a0ecSDave Kleikamp } 4373ac27a0ecSDave Kleikamp 4374ac27a0ecSDave Kleikamp /* 4375ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4376ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4377ac27a0ecSDave Kleikamp * main filesystem now. 4378ac27a0ecSDave Kleikamp */ 4379617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4380617ba13bSMingming Cao struct ext4_super_block *es) 4381ac27a0ecSDave Kleikamp { 4382ac27a0ecSDave Kleikamp journal_t *journal; 4383ac27a0ecSDave Kleikamp int j_errno; 4384ac27a0ecSDave Kleikamp const char *errstr; 4385ac27a0ecSDave Kleikamp 43860390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43870390131bSFrank Mayhar 4388617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4389ac27a0ecSDave Kleikamp 4390ac27a0ecSDave Kleikamp /* 4391ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4392617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4393ac27a0ecSDave Kleikamp */ 4394ac27a0ecSDave Kleikamp 4395dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4396ac27a0ecSDave Kleikamp if (j_errno) { 4397ac27a0ecSDave Kleikamp char nbuf[16]; 4398ac27a0ecSDave Kleikamp 4399617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 440012062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4401ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 440212062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4403ac27a0ecSDave Kleikamp 4404617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4405617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4406e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4407ac27a0ecSDave Kleikamp 4408dab291afSMingming Cao jbd2_journal_clear_err(journal); 4409ac27a0ecSDave Kleikamp } 4410ac27a0ecSDave Kleikamp } 4411ac27a0ecSDave Kleikamp 4412ac27a0ecSDave Kleikamp /* 4413ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4414ac27a0ecSDave Kleikamp * and wait on the commit. 4415ac27a0ecSDave Kleikamp */ 4416617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4417ac27a0ecSDave Kleikamp { 4418ac27a0ecSDave Kleikamp journal_t *journal; 44190390131bSFrank Mayhar int ret = 0; 4420ac27a0ecSDave Kleikamp 4421ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4422ac27a0ecSDave Kleikamp return 0; 4423ac27a0ecSDave Kleikamp 4424617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 44256b0310fbSEric Sandeen if (journal) { 4426437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 4427617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 44286b0310fbSEric Sandeen } 44290390131bSFrank Mayhar 4430ac27a0ecSDave Kleikamp return ret; 4431ac27a0ecSDave Kleikamp } 4432ac27a0ecSDave Kleikamp 4433617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 4434ac27a0ecSDave Kleikamp { 4435ebc1ac16SChristoph Hellwig lock_super(sb); 4436e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4437ebc1ac16SChristoph Hellwig unlock_super(sb); 44380390131bSFrank Mayhar } 4439ac27a0ecSDave Kleikamp 4440617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4441ac27a0ecSDave Kleikamp { 444214ce0cb4STheodore Ts'o int ret = 0; 44439eddacf9SJan Kara tid_t target; 44448d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4445ac27a0ecSDave Kleikamp 44469bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 44478d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 44488d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4449ac27a0ecSDave Kleikamp if (wait) 44508d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 44510390131bSFrank Mayhar } 445214ce0cb4STheodore Ts'o return ret; 4453ac27a0ecSDave Kleikamp } 4454ac27a0ecSDave Kleikamp 4455ac27a0ecSDave Kleikamp /* 4456ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4457ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4458be4f27d3SYongqiang Yang * 4459be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 4460be4f27d3SYongqiang Yang * state independently, because ext4 prevents a new handle from being started 4461be4f27d3SYongqiang Yang * by @sb->s_frozen, which stays in an upper layer. It thus needs help from 4462be4f27d3SYongqiang Yang * the upper layer. 4463ac27a0ecSDave Kleikamp */ 4464c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4465ac27a0ecSDave Kleikamp { 4466c4be0c1dSTakashi Sato int error = 0; 4467c4be0c1dSTakashi Sato journal_t *journal; 4468ac27a0ecSDave Kleikamp 44699ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 44709ca92389STheodore Ts'o return 0; 44719ca92389STheodore Ts'o 4472c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4473ac27a0ecSDave Kleikamp 4474ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4475dab291afSMingming Cao jbd2_journal_lock_updates(journal); 44767ffe1ea8SHidehiro Kawai 44777ffe1ea8SHidehiro Kawai /* 44789ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 44799ca92389STheodore Ts'o * the journal. 44807ffe1ea8SHidehiro Kawai */ 4481c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 44826b0310fbSEric Sandeen if (error < 0) 44836b0310fbSEric Sandeen goto out; 4484ac27a0ecSDave Kleikamp 4485ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4486617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4487e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 44886b0310fbSEric Sandeen out: 44896b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 44906b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 44916b0310fbSEric Sandeen return error; 4492ac27a0ecSDave Kleikamp } 4493ac27a0ecSDave Kleikamp 4494ac27a0ecSDave Kleikamp /* 4495ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4496ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4497ac27a0ecSDave Kleikamp */ 4498c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4499ac27a0ecSDave Kleikamp { 45009ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 45019ca92389STheodore Ts'o return 0; 45029ca92389STheodore Ts'o 4503ac27a0ecSDave Kleikamp lock_super(sb); 45049ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4505617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4506e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4507ac27a0ecSDave Kleikamp unlock_super(sb); 4508c4be0c1dSTakashi Sato return 0; 4509ac27a0ecSDave Kleikamp } 4510ac27a0ecSDave Kleikamp 4511673c6100STheodore Ts'o /* 4512673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4513673c6100STheodore Ts'o */ 4514673c6100STheodore Ts'o struct ext4_mount_options { 4515673c6100STheodore Ts'o unsigned long s_mount_opt; 4516a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 451708cefc7aSEric W. Biederman kuid_t s_resuid; 451808cefc7aSEric W. Biederman kgid_t s_resgid; 4519673c6100STheodore Ts'o unsigned long s_commit_interval; 4520673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4521673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4522673c6100STheodore Ts'o int s_jquota_fmt; 4523673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4524673c6100STheodore Ts'o #endif 4525673c6100STheodore Ts'o }; 4526673c6100STheodore Ts'o 4527617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4528ac27a0ecSDave Kleikamp { 4529617ba13bSMingming Cao struct ext4_super_block *es; 4530617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4531ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4532617ba13bSMingming Cao struct ext4_mount_options old_opts; 4533c79d967dSChristoph Hellwig int enable_quota = 0; 45348a266467STheodore Ts'o ext4_group_t g; 4535b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4536c5e06d10SJohann Lombardi int err = 0; 4537ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4538ac27a0ecSDave Kleikamp int i; 4539ac27a0ecSDave Kleikamp #endif 4540d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4541ac27a0ecSDave Kleikamp 4542ac27a0ecSDave Kleikamp /* Store the original options */ 4543bbd6851aSAl Viro lock_super(sb); 4544ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4545ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4546a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4547ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4548ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4549ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 455030773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 455130773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4552ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4553ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4554ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4555ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4556ac27a0ecSDave Kleikamp #endif 4557b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4558b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4559ac27a0ecSDave Kleikamp 4560ac27a0ecSDave Kleikamp /* 4561ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4562ac27a0ecSDave Kleikamp */ 4563661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4564ac27a0ecSDave Kleikamp err = -EINVAL; 4565ac27a0ecSDave Kleikamp goto restore_opts; 4566ac27a0ecSDave Kleikamp } 4567ac27a0ecSDave Kleikamp 45684ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4569c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4570ac27a0ecSDave Kleikamp 4571ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4572482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4573ac27a0ecSDave Kleikamp 4574ac27a0ecSDave Kleikamp es = sbi->s_es; 4575ac27a0ecSDave Kleikamp 4576b3881f74STheodore Ts'o if (sbi->s_journal) { 4577617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4578b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4579b3881f74STheodore Ts'o } 4580ac27a0ecSDave Kleikamp 4581661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 45824ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4583ac27a0ecSDave Kleikamp err = -EROFS; 4584ac27a0ecSDave Kleikamp goto restore_opts; 4585ac27a0ecSDave Kleikamp } 4586ac27a0ecSDave Kleikamp 4587ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 45880f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 45890f0dd62fSChristoph Hellwig if (err < 0) 4590c79d967dSChristoph Hellwig goto restore_opts; 4591c79d967dSChristoph Hellwig 4592ac27a0ecSDave Kleikamp /* 4593ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4594ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4595ac27a0ecSDave Kleikamp */ 4596ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4597ac27a0ecSDave Kleikamp 4598ac27a0ecSDave Kleikamp /* 4599ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4600ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4601ac27a0ecSDave Kleikamp * mark the partition as valid again. 4602ac27a0ecSDave Kleikamp */ 4603617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4604617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4605ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4606ac27a0ecSDave Kleikamp 4607a63c9eb2STheodore Ts'o if (sbi->s_journal) 4608617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4609ac27a0ecSDave Kleikamp } else { 4610a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4611a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4612ac27a0ecSDave Kleikamp err = -EROFS; 4613ac27a0ecSDave Kleikamp goto restore_opts; 4614ac27a0ecSDave Kleikamp } 4615ead6596bSEric Sandeen /* 46168a266467STheodore Ts'o * Make sure the group descriptor checksums 46170b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 46188a266467STheodore Ts'o */ 46198a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 46208a266467STheodore Ts'o struct ext4_group_desc *gdp = 46218a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 46228a266467STheodore Ts'o 4623feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4624b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4625b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 46268a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 46278a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 46288a266467STheodore Ts'o err = -EINVAL; 46298a266467STheodore Ts'o goto restore_opts; 46308a266467STheodore Ts'o } 46318a266467STheodore Ts'o } 46328a266467STheodore Ts'o 46338a266467STheodore Ts'o /* 4634ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4635ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4636ead6596bSEric Sandeen * require a full umount/remount for now. 4637ead6596bSEric Sandeen */ 4638ead6596bSEric Sandeen if (es->s_last_orphan) { 4639b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4640ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4641ead6596bSEric Sandeen "orphan inode list. Please " 4642b31e1552SEric Sandeen "umount/remount instead"); 4643ead6596bSEric Sandeen err = -EINVAL; 4644ead6596bSEric Sandeen goto restore_opts; 4645ead6596bSEric Sandeen } 4646ead6596bSEric Sandeen 4647ac27a0ecSDave Kleikamp /* 4648ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4649ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4650ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4651ac27a0ecSDave Kleikamp * the partition.) 4652ac27a0ecSDave Kleikamp */ 46530390131bSFrank Mayhar if (sbi->s_journal) 4654617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4655ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4656617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4657ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4658c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4659c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4660c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4661c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4662c5e06d10SJohann Lombardi err = -EROFS; 4663c5e06d10SJohann Lombardi goto restore_opts; 4664c5e06d10SJohann Lombardi } 4665c79d967dSChristoph Hellwig enable_quota = 1; 4666ac27a0ecSDave Kleikamp } 4667ac27a0ecSDave Kleikamp } 4668bfff6873SLukas Czerner 4669bfff6873SLukas Czerner /* 4670bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4671bfff6873SLukas Czerner * current settings 4672bfff6873SLukas Czerner */ 4673bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4674bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4675bfff6873SLukas Czerner else { 4676bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4677bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4678bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4679bfff6873SLukas Czerner } 4680bfff6873SLukas Czerner 46816fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 46820390131bSFrank Mayhar if (sbi->s_journal == NULL) 4683e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 46840390131bSFrank Mayhar 4685ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4686ac27a0ecSDave Kleikamp /* Release old quota file names */ 4687ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4688ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4689ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4690ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 4691ac27a0ecSDave Kleikamp #endif 4692bbd6851aSAl Viro unlock_super(sb); 4693c79d967dSChristoph Hellwig if (enable_quota) 46940f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4695d4c402d9SCurt Wohlgemuth 4696d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4697d4c402d9SCurt Wohlgemuth kfree(orig_data); 4698ac27a0ecSDave Kleikamp return 0; 46990b8e58a1SAndreas Dilger 4700ac27a0ecSDave Kleikamp restore_opts: 4701ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4702ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4703a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4704ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4705ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4706ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 470730773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 470830773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4709ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4710ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4711ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4712ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4713ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4714ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4715ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4716ac27a0ecSDave Kleikamp } 4717ac27a0ecSDave Kleikamp #endif 4718bbd6851aSAl Viro unlock_super(sb); 4719d4c402d9SCurt Wohlgemuth kfree(orig_data); 4720ac27a0ecSDave Kleikamp return err; 4721ac27a0ecSDave Kleikamp } 4722ac27a0ecSDave Kleikamp 4723617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4724ac27a0ecSDave Kleikamp { 4725ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4726617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4727617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4728*952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 4729960cc398SPekka Enberg u64 fsid; 4730d02a9391SKazuya Mio s64 bfree; 4731ac27a0ecSDave Kleikamp 4732*952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 4733*952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 4734ac27a0ecSDave Kleikamp 4735617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4736ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4737*952fc18eSTheodore Ts'o buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, sbi->s_overhead); 473857042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 473957042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4740d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 474157042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 4742bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4743bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4744ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4745ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 474652d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4747617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4748960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4749960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4750960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4751960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 47520b8e58a1SAndreas Dilger 4753ac27a0ecSDave Kleikamp return 0; 4754ac27a0ecSDave Kleikamp } 4755ac27a0ecSDave Kleikamp 47560b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 47570b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4758ac27a0ecSDave Kleikamp * Process 1 Process 2 4759617ba13bSMingming Cao * ext4_create() quota_sync() 4760dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4761871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4762dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4763ac27a0ecSDave Kleikamp * 4764ac27a0ecSDave Kleikamp */ 4765ac27a0ecSDave Kleikamp 4766ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4767ac27a0ecSDave Kleikamp 4768ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4769ac27a0ecSDave Kleikamp { 4770ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4771ac27a0ecSDave Kleikamp } 4772ac27a0ecSDave Kleikamp 4773617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4774ac27a0ecSDave Kleikamp { 4775ac27a0ecSDave Kleikamp int ret, err; 4776ac27a0ecSDave Kleikamp handle_t *handle; 4777ac27a0ecSDave Kleikamp struct inode *inode; 4778ac27a0ecSDave Kleikamp 4779ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4780617ba13bSMingming Cao handle = ext4_journal_start(inode, 4781617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4782ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4783ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4784ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4785617ba13bSMingming Cao err = ext4_journal_stop(handle); 4786ac27a0ecSDave Kleikamp if (!ret) 4787ac27a0ecSDave Kleikamp ret = err; 4788ac27a0ecSDave Kleikamp return ret; 4789ac27a0ecSDave Kleikamp } 4790ac27a0ecSDave Kleikamp 4791617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4792ac27a0ecSDave Kleikamp { 4793ac27a0ecSDave Kleikamp int ret, err; 4794ac27a0ecSDave Kleikamp handle_t *handle; 4795ac27a0ecSDave Kleikamp 4796617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4797617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4798ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4799ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4800ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4801617ba13bSMingming Cao err = ext4_journal_stop(handle); 4802ac27a0ecSDave Kleikamp if (!ret) 4803ac27a0ecSDave Kleikamp ret = err; 4804ac27a0ecSDave Kleikamp return ret; 4805ac27a0ecSDave Kleikamp } 4806ac27a0ecSDave Kleikamp 4807617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4808ac27a0ecSDave Kleikamp { 4809ac27a0ecSDave Kleikamp int ret, err; 4810ac27a0ecSDave Kleikamp handle_t *handle; 4811ac27a0ecSDave Kleikamp 4812617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4813617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 48149c3013e9SJan Kara if (IS_ERR(handle)) { 48159c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 48169c3013e9SJan Kara dquot_release(dquot); 4817ac27a0ecSDave Kleikamp return PTR_ERR(handle); 48189c3013e9SJan Kara } 4819ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4820617ba13bSMingming Cao err = ext4_journal_stop(handle); 4821ac27a0ecSDave Kleikamp if (!ret) 4822ac27a0ecSDave Kleikamp ret = err; 4823ac27a0ecSDave Kleikamp return ret; 4824ac27a0ecSDave Kleikamp } 4825ac27a0ecSDave Kleikamp 4826617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4827ac27a0ecSDave Kleikamp { 48282c8be6b2SJan Kara /* Are we journaling quotas? */ 4829617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4830617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4831ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4832617ba13bSMingming Cao return ext4_write_dquot(dquot); 4833ac27a0ecSDave Kleikamp } else { 4834ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4835ac27a0ecSDave Kleikamp } 4836ac27a0ecSDave Kleikamp } 4837ac27a0ecSDave Kleikamp 4838617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4839ac27a0ecSDave Kleikamp { 4840ac27a0ecSDave Kleikamp int ret, err; 4841ac27a0ecSDave Kleikamp handle_t *handle; 4842ac27a0ecSDave Kleikamp 4843ac27a0ecSDave Kleikamp /* Data block + inode block */ 4844617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4845ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4846ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4847ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4848617ba13bSMingming Cao err = ext4_journal_stop(handle); 4849ac27a0ecSDave Kleikamp if (!ret) 4850ac27a0ecSDave Kleikamp ret = err; 4851ac27a0ecSDave Kleikamp return ret; 4852ac27a0ecSDave Kleikamp } 4853ac27a0ecSDave Kleikamp 4854ac27a0ecSDave Kleikamp /* 4855ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4856ac27a0ecSDave Kleikamp * the quota file and such... 4857ac27a0ecSDave Kleikamp */ 4858617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4859ac27a0ecSDave Kleikamp { 4860287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4861617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4862ac27a0ecSDave Kleikamp } 4863ac27a0ecSDave Kleikamp 4864ac27a0ecSDave Kleikamp /* 4865ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4866ac27a0ecSDave Kleikamp */ 4867617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4868f00c9e44SJan Kara struct path *path) 4869ac27a0ecSDave Kleikamp { 4870ac27a0ecSDave Kleikamp int err; 4871ac27a0ecSDave Kleikamp 4872ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4873ac27a0ecSDave Kleikamp return -EINVAL; 48740623543bSJan Kara 4875ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4876d8c9584eSAl Viro if (path->dentry->d_sb != sb) 4877ac27a0ecSDave Kleikamp return -EXDEV; 48780623543bSJan Kara /* Journaling quota? */ 48790623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 48802b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4881f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4882b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4883b31e1552SEric Sandeen "Quota file not on filesystem root. " 4884b31e1552SEric Sandeen "Journaled quota will not work"); 48850623543bSJan Kara } 48860623543bSJan Kara 48870623543bSJan Kara /* 48880623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 48890623543bSJan Kara * all updates to the file when we bypass pagecache... 48900623543bSJan Kara */ 48910390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4892f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 48930623543bSJan Kara /* 48940623543bSJan Kara * We don't need to lock updates but journal_flush() could 48950623543bSJan Kara * otherwise be livelocked... 48960623543bSJan Kara */ 48970623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 48987ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 48990623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4900f00c9e44SJan Kara if (err) 49017ffe1ea8SHidehiro Kawai return err; 49027ffe1ea8SHidehiro Kawai } 49030623543bSJan Kara 4904f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4905ac27a0ecSDave Kleikamp } 4906ac27a0ecSDave Kleikamp 4907ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4908ca0e05e4SDmitry Monakhov { 490921f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 491021f97697SJan Kara handle_t *handle; 491121f97697SJan Kara 491287009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 491387009d86SDmitry Monakhov * Caller already holds s_umount sem */ 491487009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 4915ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4916ca0e05e4SDmitry Monakhov 49170b268590SAmir Goldstein if (!inode) 49180b268590SAmir Goldstein goto out; 49190b268590SAmir Goldstein 492021f97697SJan Kara /* Update modification times of quota files when userspace can 492121f97697SJan Kara * start looking at them */ 492221f97697SJan Kara handle = ext4_journal_start(inode, 1); 492321f97697SJan Kara if (IS_ERR(handle)) 492421f97697SJan Kara goto out; 492521f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 492621f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 492721f97697SJan Kara ext4_journal_stop(handle); 492821f97697SJan Kara 492921f97697SJan Kara out: 4930ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4931ca0e05e4SDmitry Monakhov } 4932ca0e05e4SDmitry Monakhov 4933ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4934ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4935ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 4936ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4937617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4938ac27a0ecSDave Kleikamp size_t len, loff_t off) 4939ac27a0ecSDave Kleikamp { 4940ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4941725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4942ac27a0ecSDave Kleikamp int err = 0; 4943ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4944ac27a0ecSDave Kleikamp int tocopy; 4945ac27a0ecSDave Kleikamp size_t toread; 4946ac27a0ecSDave Kleikamp struct buffer_head *bh; 4947ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4948ac27a0ecSDave Kleikamp 4949ac27a0ecSDave Kleikamp if (off > i_size) 4950ac27a0ecSDave Kleikamp return 0; 4951ac27a0ecSDave Kleikamp if (off+len > i_size) 4952ac27a0ecSDave Kleikamp len = i_size-off; 4953ac27a0ecSDave Kleikamp toread = len; 4954ac27a0ecSDave Kleikamp while (toread > 0) { 4955ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4956ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4957617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4958ac27a0ecSDave Kleikamp if (err) 4959ac27a0ecSDave Kleikamp return err; 4960ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4961ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4962ac27a0ecSDave Kleikamp else 4963ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4964ac27a0ecSDave Kleikamp brelse(bh); 4965ac27a0ecSDave Kleikamp offset = 0; 4966ac27a0ecSDave Kleikamp toread -= tocopy; 4967ac27a0ecSDave Kleikamp data += tocopy; 4968ac27a0ecSDave Kleikamp blk++; 4969ac27a0ecSDave Kleikamp } 4970ac27a0ecSDave Kleikamp return len; 4971ac27a0ecSDave Kleikamp } 4972ac27a0ecSDave Kleikamp 4973ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4974ac27a0ecSDave Kleikamp * enough credits) */ 4975617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4976ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4977ac27a0ecSDave Kleikamp { 4978ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4979725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4980ac27a0ecSDave Kleikamp int err = 0; 4981ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4982ac27a0ecSDave Kleikamp struct buffer_head *bh; 4983ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4984ac27a0ecSDave Kleikamp 49850390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4986b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4987b31e1552SEric Sandeen " cancelled because transaction is not started", 49889c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 49899c3013e9SJan Kara return -EIO; 49909c3013e9SJan Kara } 499167eeb568SDmitry Monakhov /* 499267eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 499367eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 499467eeb568SDmitry Monakhov */ 499567eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 499667eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 499767eeb568SDmitry Monakhov " cancelled because not block aligned", 499867eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 499967eeb568SDmitry Monakhov return -EIO; 500067eeb568SDmitry Monakhov } 500167eeb568SDmitry Monakhov 5002617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 5003ac27a0ecSDave Kleikamp if (!bh) 5004ac27a0ecSDave Kleikamp goto out; 5005617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5006ac27a0ecSDave Kleikamp if (err) { 5007ac27a0ecSDave Kleikamp brelse(bh); 5008ac27a0ecSDave Kleikamp goto out; 5009ac27a0ecSDave Kleikamp } 5010ac27a0ecSDave Kleikamp lock_buffer(bh); 501167eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5012ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5013ac27a0ecSDave Kleikamp unlock_buffer(bh); 50140390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5015ac27a0ecSDave Kleikamp brelse(bh); 5016ac27a0ecSDave Kleikamp out: 50170b7f7cefSJan Kara if (err) 5018ac27a0ecSDave Kleikamp return err; 501967eeb568SDmitry Monakhov if (inode->i_size < off + len) { 502067eeb568SDmitry Monakhov i_size_write(inode, off + len); 5021617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5022617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 502321f97697SJan Kara } 502467eeb568SDmitry Monakhov return len; 5025ac27a0ecSDave Kleikamp } 5026ac27a0ecSDave Kleikamp 5027ac27a0ecSDave Kleikamp #endif 5028ac27a0ecSDave Kleikamp 5029152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5030152a0836SAl Viro const char *dev_name, void *data) 5031ac27a0ecSDave Kleikamp { 5032152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5033ac27a0ecSDave Kleikamp } 5034ac27a0ecSDave Kleikamp 503537f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 503624b58424STheodore Ts'o static inline void register_as_ext2(void) 503724b58424STheodore Ts'o { 503824b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 503924b58424STheodore Ts'o if (err) 504024b58424STheodore Ts'o printk(KERN_WARNING 504124b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 504224b58424STheodore Ts'o } 504324b58424STheodore Ts'o 504424b58424STheodore Ts'o static inline void unregister_as_ext2(void) 504524b58424STheodore Ts'o { 504624b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 504724b58424STheodore Ts'o } 50482035e776STheodore Ts'o 50492035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 50502035e776STheodore Ts'o { 50512035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 50522035e776STheodore Ts'o return 0; 50532035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 50542035e776STheodore Ts'o return 1; 50552035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 50562035e776STheodore Ts'o return 0; 50572035e776STheodore Ts'o return 1; 50582035e776STheodore Ts'o } 505951b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 506024b58424STheodore Ts'o #else 506124b58424STheodore Ts'o static inline void register_as_ext2(void) { } 506224b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 50632035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 506424b58424STheodore Ts'o #endif 506524b58424STheodore Ts'o 506637f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 506724b58424STheodore Ts'o static inline void register_as_ext3(void) 506824b58424STheodore Ts'o { 506924b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 507024b58424STheodore Ts'o if (err) 507124b58424STheodore Ts'o printk(KERN_WARNING 507224b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 507324b58424STheodore Ts'o } 507424b58424STheodore Ts'o 507524b58424STheodore Ts'o static inline void unregister_as_ext3(void) 507624b58424STheodore Ts'o { 507724b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 507824b58424STheodore Ts'o } 50792035e776STheodore Ts'o 50802035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 50812035e776STheodore Ts'o { 50822035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 50832035e776STheodore Ts'o return 0; 50842035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 50852035e776STheodore Ts'o return 0; 50862035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 50872035e776STheodore Ts'o return 1; 50882035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 50892035e776STheodore Ts'o return 0; 50902035e776STheodore Ts'o return 1; 50912035e776STheodore Ts'o } 509251b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 509324b58424STheodore Ts'o #else 509424b58424STheodore Ts'o static inline void register_as_ext3(void) { } 509524b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 50962035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 509724b58424STheodore Ts'o #endif 509824b58424STheodore Ts'o 509903010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5100ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 510103010a33STheodore Ts'o .name = "ext4", 5102152a0836SAl Viro .mount = ext4_mount, 5103ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5104ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5105ac27a0ecSDave Kleikamp }; 5106ac27a0ecSDave Kleikamp 51078f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5108857ac889SLukas Czerner { 5109857ac889SLukas Czerner struct ext4_features *ef; 5110857ac889SLukas Czerner int ret = -ENOMEM; 5111857ac889SLukas Czerner 5112857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5113857ac889SLukas Czerner if (!ef) 5114857ac889SLukas Czerner goto out; 5115857ac889SLukas Czerner 5116857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5117857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5118857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5119857ac889SLukas Czerner "features"); 5120857ac889SLukas Czerner if (ret) { 5121857ac889SLukas Czerner kfree(ef); 5122857ac889SLukas Czerner goto out; 5123857ac889SLukas Czerner } 5124857ac889SLukas Czerner 5125857ac889SLukas Czerner ext4_feat = ef; 5126857ac889SLukas Czerner ret = 0; 5127857ac889SLukas Czerner out: 5128857ac889SLukas Czerner return ret; 5129857ac889SLukas Czerner } 5130857ac889SLukas Czerner 51318f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 51328f021222SLukas Czerner { 51338f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 51348f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 51358f021222SLukas Czerner kfree(ext4_feat); 51368f021222SLukas Czerner } 51378f021222SLukas Czerner 5138e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5139e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5140e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5141e9e3bcecSEric Sandeen 51425dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5143ac27a0ecSDave Kleikamp { 5144e9e3bcecSEric Sandeen int i, err; 5145c9de560dSAlex Tomas 514607c0c5d8SAl Viro ext4_li_info = NULL; 514707c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 514807c0c5d8SAl Viro 514912e9b892SDmitry Monakhov ext4_check_flag_values(); 5150e9e3bcecSEric Sandeen 5151e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5152e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5153e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5154e9e3bcecSEric Sandeen } 5155e9e3bcecSEric Sandeen 51565dabfc78STheodore Ts'o err = ext4_init_pageio(); 51576fd058f7STheodore Ts'o if (err) 51586fd058f7STheodore Ts'o return err; 51595dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5160bd2d0210STheodore Ts'o if (err) 5161d44651d0SFabrice Jouhaud goto out6; 51623197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 51633197ebdbSTheodore Ts'o if (!ext4_kset) 5164dd68314cSTheodore Ts'o goto out5; 5165d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5166857ac889SLukas Czerner 5167857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5168dd68314cSTheodore Ts'o if (err) 5169dd68314cSTheodore Ts'o goto out4; 5170857ac889SLukas Czerner 51715dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5172ac27a0ecSDave Kleikamp if (err) 51736fd058f7STheodore Ts'o goto out3; 5174c9de560dSAlex Tomas 51755dabfc78STheodore Ts'o err = ext4_init_xattr(); 5176c9de560dSAlex Tomas if (err) 5177c9de560dSAlex Tomas goto out2; 5178ac27a0ecSDave Kleikamp err = init_inodecache(); 5179ac27a0ecSDave Kleikamp if (err) 5180ac27a0ecSDave Kleikamp goto out1; 518124b58424STheodore Ts'o register_as_ext3(); 51822035e776STheodore Ts'o register_as_ext2(); 518303010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5184ac27a0ecSDave Kleikamp if (err) 5185ac27a0ecSDave Kleikamp goto out; 5186bfff6873SLukas Czerner 5187ac27a0ecSDave Kleikamp return 0; 5188ac27a0ecSDave Kleikamp out: 518924b58424STheodore Ts'o unregister_as_ext2(); 519024b58424STheodore Ts'o unregister_as_ext3(); 5191ac27a0ecSDave Kleikamp destroy_inodecache(); 5192ac27a0ecSDave Kleikamp out1: 51935dabfc78STheodore Ts'o ext4_exit_xattr(); 5194c9de560dSAlex Tomas out2: 51955dabfc78STheodore Ts'o ext4_exit_mballoc(); 51966fd058f7STheodore Ts'o out3: 51978f021222SLukas Czerner ext4_exit_feat_adverts(); 51986fd058f7STheodore Ts'o out4: 5199d44651d0SFabrice Jouhaud if (ext4_proc_root) 5200dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5201dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5202d44651d0SFabrice Jouhaud out5: 5203dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5204d44651d0SFabrice Jouhaud out6: 52055dabfc78STheodore Ts'o ext4_exit_pageio(); 5206ac27a0ecSDave Kleikamp return err; 5207ac27a0ecSDave Kleikamp } 5208ac27a0ecSDave Kleikamp 52095dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5210ac27a0ecSDave Kleikamp { 5211bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 521224b58424STheodore Ts'o unregister_as_ext2(); 521324b58424STheodore Ts'o unregister_as_ext3(); 521403010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5215ac27a0ecSDave Kleikamp destroy_inodecache(); 52165dabfc78STheodore Ts'o ext4_exit_xattr(); 52175dabfc78STheodore Ts'o ext4_exit_mballoc(); 52188f021222SLukas Czerner ext4_exit_feat_adverts(); 52199f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 52203197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 52215dabfc78STheodore Ts'o ext4_exit_system_zone(); 52225dabfc78STheodore Ts'o ext4_exit_pageio(); 5223ac27a0ecSDave Kleikamp } 5224ac27a0ecSDave Kleikamp 5225ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 522683982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5227ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 52285dabfc78STheodore Ts'o module_init(ext4_init_fs) 52295dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5230