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); 542ac27a0ecSDave Kleikamp 543617ba13bSMingming Cao ext4_handle_error(sb); 544ac27a0ecSDave Kleikamp } 545ac27a0ecSDave Kleikamp 546c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 547c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 548273df556SFrank Mayhar const char *fmt, ...) 549273df556SFrank Mayhar { 550273df556SFrank Mayhar va_list args; 551f7c21177STheodore Ts'o struct va_format vaf; 5521c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 553273df556SFrank Mayhar 5541c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5551c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 5561c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 557273df556SFrank Mayhar va_start(args, fmt); 558f7c21177STheodore Ts'o vaf.fmt = fmt; 559f7c21177STheodore Ts'o vaf.va = &args; 560c398eda0STheodore Ts'o if (block) 561d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 562d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 563d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 564d9ee81daSJoe Perches block, current->comm, &vaf); 565d9ee81daSJoe Perches else 566d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 567d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 568d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 569d9ee81daSJoe Perches current->comm, &vaf); 570273df556SFrank Mayhar va_end(args); 571273df556SFrank Mayhar 572273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 573273df556SFrank Mayhar } 574273df556SFrank Mayhar 575c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 576f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 577f7c21177STheodore Ts'o const char *fmt, ...) 578273df556SFrank Mayhar { 579273df556SFrank Mayhar va_list args; 580f7c21177STheodore Ts'o struct va_format vaf; 5811c13d5c0STheodore Ts'o struct ext4_super_block *es; 582273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 583273df556SFrank Mayhar char pathname[80], *path; 584273df556SFrank Mayhar 5851c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5861c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5871c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 588273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 589f9a62d09SDan Carpenter if (IS_ERR(path)) 590273df556SFrank Mayhar path = "(unknown)"; 591f7c21177STheodore Ts'o va_start(args, fmt); 592f7c21177STheodore Ts'o vaf.fmt = fmt; 593f7c21177STheodore Ts'o vaf.va = &args; 594d9ee81daSJoe Perches if (block) 595d9ee81daSJoe Perches printk(KERN_CRIT 596d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 597d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 598d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 599d9ee81daSJoe Perches block, current->comm, path, &vaf); 600d9ee81daSJoe Perches else 601d9ee81daSJoe Perches printk(KERN_CRIT 602d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 603d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 604d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 605d9ee81daSJoe Perches current->comm, path, &vaf); 606273df556SFrank Mayhar va_end(args); 607273df556SFrank Mayhar 608273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 609273df556SFrank Mayhar } 610273df556SFrank Mayhar 611617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 612ac27a0ecSDave Kleikamp char nbuf[16]) 613ac27a0ecSDave Kleikamp { 614ac27a0ecSDave Kleikamp char *errstr = NULL; 615ac27a0ecSDave Kleikamp 616ac27a0ecSDave Kleikamp switch (errno) { 617ac27a0ecSDave Kleikamp case -EIO: 618ac27a0ecSDave Kleikamp errstr = "IO failure"; 619ac27a0ecSDave Kleikamp break; 620ac27a0ecSDave Kleikamp case -ENOMEM: 621ac27a0ecSDave Kleikamp errstr = "Out of memory"; 622ac27a0ecSDave Kleikamp break; 623ac27a0ecSDave Kleikamp case -EROFS: 62478f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 62578f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 626ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 627ac27a0ecSDave Kleikamp else 628ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 629ac27a0ecSDave Kleikamp break; 630ac27a0ecSDave Kleikamp default: 631ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 632ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 633ac27a0ecSDave Kleikamp * NULL. */ 634ac27a0ecSDave Kleikamp if (nbuf) { 635ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 636ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 637ac27a0ecSDave Kleikamp errstr = nbuf; 638ac27a0ecSDave Kleikamp } 639ac27a0ecSDave Kleikamp break; 640ac27a0ecSDave Kleikamp } 641ac27a0ecSDave Kleikamp 642ac27a0ecSDave Kleikamp return errstr; 643ac27a0ecSDave Kleikamp } 644ac27a0ecSDave Kleikamp 645617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 646ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 647ac27a0ecSDave Kleikamp 648c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 649c398eda0STheodore Ts'o unsigned int line, int errno) 650ac27a0ecSDave Kleikamp { 651ac27a0ecSDave Kleikamp char nbuf[16]; 652ac27a0ecSDave Kleikamp const char *errstr; 653ac27a0ecSDave Kleikamp 654ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 655ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 656ac27a0ecSDave Kleikamp * an error. */ 657ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 658ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 659ac27a0ecSDave Kleikamp return; 660ac27a0ecSDave Kleikamp 661617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 662c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 663c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 6641c13d5c0STheodore Ts'o save_error_info(sb, function, line); 665ac27a0ecSDave Kleikamp 666617ba13bSMingming Cao ext4_handle_error(sb); 667ac27a0ecSDave Kleikamp } 668ac27a0ecSDave Kleikamp 669ac27a0ecSDave Kleikamp /* 670617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 671ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 672ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 673ac27a0ecSDave Kleikamp * 674ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 675ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 676ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 677ac27a0ecSDave Kleikamp */ 678ac27a0ecSDave Kleikamp 679c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 680c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 681ac27a0ecSDave Kleikamp { 682ac27a0ecSDave Kleikamp va_list args; 683ac27a0ecSDave Kleikamp 6841c13d5c0STheodore Ts'o save_error_info(sb, function, line); 685ac27a0ecSDave Kleikamp va_start(args, fmt); 686c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 687c398eda0STheodore Ts'o function, line); 688ac27a0ecSDave Kleikamp vprintk(fmt, args); 689ac27a0ecSDave Kleikamp printk("\n"); 690ac27a0ecSDave Kleikamp va_end(args); 691ac27a0ecSDave Kleikamp 6921c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 693b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 694ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 6954ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 696ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 697dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6981c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6991c13d5c0STheodore Ts'o } 7001c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 7011c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 702ac27a0ecSDave Kleikamp } 703ac27a0ecSDave Kleikamp 7040ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 705b31e1552SEric Sandeen { 7060ff2ea7dSJoe Perches struct va_format vaf; 707b31e1552SEric Sandeen va_list args; 708b31e1552SEric Sandeen 709b31e1552SEric Sandeen va_start(args, fmt); 7100ff2ea7dSJoe Perches vaf.fmt = fmt; 7110ff2ea7dSJoe Perches vaf.va = &args; 7120ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 713b31e1552SEric Sandeen va_end(args); 714b31e1552SEric Sandeen } 715b31e1552SEric Sandeen 71612062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 717c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 718ac27a0ecSDave Kleikamp { 7190ff2ea7dSJoe Perches struct va_format vaf; 720ac27a0ecSDave Kleikamp va_list args; 721ac27a0ecSDave Kleikamp 722ac27a0ecSDave Kleikamp va_start(args, fmt); 7230ff2ea7dSJoe Perches vaf.fmt = fmt; 7240ff2ea7dSJoe Perches vaf.va = &args; 7250ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 7260ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 727ac27a0ecSDave Kleikamp va_end(args); 728ac27a0ecSDave Kleikamp } 729ac27a0ecSDave Kleikamp 730e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 731e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 732e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 733e29136f8STheodore Ts'o const char *fmt, ...) 7345d1b1b3fSAneesh Kumar K.V __releases(bitlock) 7355d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 7365d1b1b3fSAneesh Kumar K.V { 7370ff2ea7dSJoe Perches struct va_format vaf; 7385d1b1b3fSAneesh Kumar K.V va_list args; 7395d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 7405d1b1b3fSAneesh Kumar K.V 7411c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 7421c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 7431c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 7440ff2ea7dSJoe Perches 7455d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7460ff2ea7dSJoe Perches 7470ff2ea7dSJoe Perches vaf.fmt = fmt; 7480ff2ea7dSJoe Perches vaf.va = &args; 74921149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 750e29136f8STheodore Ts'o sb->s_id, function, line, grp); 751e29136f8STheodore Ts'o if (ino) 7520ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 753e29136f8STheodore Ts'o if (block) 7540ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 7550ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7565d1b1b3fSAneesh Kumar K.V va_end(args); 7575d1b1b3fSAneesh Kumar K.V 7585d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 759e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7605d1b1b3fSAneesh Kumar K.V return; 7615d1b1b3fSAneesh Kumar K.V } 7621c13d5c0STheodore Ts'o 7635d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 7645d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7655d1b1b3fSAneesh Kumar K.V /* 7665d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7675d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7685d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7695d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7705d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 77125985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7725d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7735d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7745d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7755d1b1b3fSAneesh Kumar K.V */ 7765d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7775d1b1b3fSAneesh Kumar K.V return; 7785d1b1b3fSAneesh Kumar K.V } 7795d1b1b3fSAneesh Kumar K.V 780617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 781ac27a0ecSDave Kleikamp { 782617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 783ac27a0ecSDave Kleikamp 784617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 785ac27a0ecSDave Kleikamp return; 786ac27a0ecSDave Kleikamp 78712062dddSEric Sandeen ext4_warning(sb, 788ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 789ac27a0ecSDave Kleikamp "running e2fsck is recommended", 790617ba13bSMingming Cao EXT4_DYNAMIC_REV); 791ac27a0ecSDave Kleikamp 792617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 793617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 794617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 795ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 796ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 797ac27a0ecSDave Kleikamp 798ac27a0ecSDave Kleikamp /* 799ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 800ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 801ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 802ac27a0ecSDave Kleikamp */ 803ac27a0ecSDave Kleikamp } 804ac27a0ecSDave Kleikamp 805ac27a0ecSDave Kleikamp /* 806ac27a0ecSDave Kleikamp * Open the external journal device 807ac27a0ecSDave Kleikamp */ 808b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 809ac27a0ecSDave Kleikamp { 810ac27a0ecSDave Kleikamp struct block_device *bdev; 811ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 812ac27a0ecSDave Kleikamp 813d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 814ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 815ac27a0ecSDave Kleikamp goto fail; 816ac27a0ecSDave Kleikamp return bdev; 817ac27a0ecSDave Kleikamp 818ac27a0ecSDave Kleikamp fail: 819b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 820ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 821ac27a0ecSDave Kleikamp return NULL; 822ac27a0ecSDave Kleikamp } 823ac27a0ecSDave Kleikamp 824ac27a0ecSDave Kleikamp /* 825ac27a0ecSDave Kleikamp * Release the journal device 826ac27a0ecSDave Kleikamp */ 827617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 828ac27a0ecSDave Kleikamp { 829e525fd89STejun Heo return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 830ac27a0ecSDave Kleikamp } 831ac27a0ecSDave Kleikamp 832617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 833ac27a0ecSDave Kleikamp { 834ac27a0ecSDave Kleikamp struct block_device *bdev; 835ac27a0ecSDave Kleikamp int ret = -ENODEV; 836ac27a0ecSDave Kleikamp 837ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 838ac27a0ecSDave Kleikamp if (bdev) { 839617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 840ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 841ac27a0ecSDave Kleikamp } 842ac27a0ecSDave Kleikamp return ret; 843ac27a0ecSDave Kleikamp } 844ac27a0ecSDave Kleikamp 845ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 846ac27a0ecSDave Kleikamp { 847617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 848ac27a0ecSDave Kleikamp } 849ac27a0ecSDave Kleikamp 850617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 851ac27a0ecSDave Kleikamp { 852ac27a0ecSDave Kleikamp struct list_head *l; 853ac27a0ecSDave Kleikamp 854b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 855ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 856ac27a0ecSDave Kleikamp 857ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 858ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 859ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 860ac27a0ecSDave Kleikamp printk(KERN_ERR " " 861ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 862ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 863ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 864ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 865ac27a0ecSDave Kleikamp } 866ac27a0ecSDave Kleikamp } 867ac27a0ecSDave Kleikamp 868617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 869ac27a0ecSDave Kleikamp { 870617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 871617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 872ef2cabf7SHidehiro Kawai int i, err; 873ac27a0ecSDave Kleikamp 874857ac889SLukas Czerner ext4_unregister_li_request(sb); 875e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 876e0ccfd95SChristoph Hellwig 8774c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 8784c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 8794c0425ffSMingming Cao 880a9e220f8SAl Viro lock_super(sb); 8810390131bSFrank Mayhar if (sbi->s_journal) { 882ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 88347b4a50bSJan Kara sbi->s_journal = NULL; 884ef2cabf7SHidehiro Kawai if (err < 0) 885c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8860390131bSFrank Mayhar } 887d4edac31SJosef Bacik 888a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 889d4edac31SJosef Bacik ext4_release_system_zone(sb); 890d4edac31SJosef Bacik ext4_mb_release(sb); 891d4edac31SJosef Bacik ext4_ext_release(sb); 892d4edac31SJosef Bacik ext4_xattr_put_super(sb); 893d4edac31SJosef Bacik 894ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 895617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 896ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 897ac27a0ecSDave Kleikamp } 898a8e25a83SArtem Bityutskiy if (sb->s_dirt || !(sb->s_flags & MS_RDONLY)) 899a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 900a8e25a83SArtem Bityutskiy 901240799cdSTheodore Ts'o if (sbi->s_proc) { 90266acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 9039f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 904240799cdSTheodore Ts'o } 9053197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 906ac27a0ecSDave Kleikamp 907ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 908ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 909f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 9109933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 91157042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 912ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 913ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 91457042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 915ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 916ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 917ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 918ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 919ac27a0ecSDave Kleikamp #endif 920ac27a0ecSDave Kleikamp 921ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 922ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 923ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 924ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 925ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 926ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 927ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 928ac27a0ecSDave Kleikamp 929f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 930ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 931ac27a0ecSDave Kleikamp /* 932ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 933ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 934ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 935ac27a0ecSDave Kleikamp */ 936ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 937f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 938617ba13bSMingming Cao ext4_blkdev_remove(sbi); 939ac27a0ecSDave Kleikamp } 940c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 941c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 942ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 9433197ebdbSTheodore Ts'o /* 9443197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 9453197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9463197ebdbSTheodore Ts'o */ 9473197ebdbSTheodore Ts'o unlock_super(sb); 9483197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9493197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9500441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9510441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 952705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 953ac27a0ecSDave Kleikamp kfree(sbi); 954ac27a0ecSDave Kleikamp } 955ac27a0ecSDave Kleikamp 956e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 957ac27a0ecSDave Kleikamp 958ac27a0ecSDave Kleikamp /* 959ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 960ac27a0ecSDave Kleikamp */ 961617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 962ac27a0ecSDave Kleikamp { 963617ba13bSMingming Cao struct ext4_inode_info *ei; 964ac27a0ecSDave Kleikamp 965e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 966ac27a0ecSDave Kleikamp if (!ei) 967ac27a0ecSDave Kleikamp return NULL; 9680b8e58a1SAndreas Dilger 969ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 97091246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 971a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 972c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 973c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 974d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 975d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 976d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9779d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 978d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 979a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 980a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 981a9e7f447SDmitry Monakhov #endif 9828aefcd55STheodore Ts'o ei->jinode = NULL; 983c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 984744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 9858d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 986b436b9beSJan Kara ei->i_sync_tid = 0; 987b436b9beSJan Kara ei->i_datasync_tid = 0; 988f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 989e9e3bcecSEric Sandeen atomic_set(&ei->i_aiodio_unwritten, 0); 9900b8e58a1SAndreas Dilger 991ac27a0ecSDave Kleikamp return &ei->vfs_inode; 992ac27a0ecSDave Kleikamp } 993ac27a0ecSDave Kleikamp 9947ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9957ff9c073STheodore Ts'o { 9967ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9977ff9c073STheodore Ts'o 9987ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9997ff9c073STheodore Ts'o return drop; 10007ff9c073STheodore Ts'o } 10017ff9c073STheodore Ts'o 1002fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 1003fa0d7e3dSNick Piggin { 1004fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 1005fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1006fa0d7e3dSNick Piggin } 1007fa0d7e3dSNick Piggin 1008617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1009ac27a0ecSDave Kleikamp { 10109f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1011b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1012b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1013b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 10149f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 10159f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 10169f7dd93dSVasily Averin true); 10179f7dd93dSVasily Averin dump_stack(); 10189f7dd93dSVasily Averin } 1019fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 1020ac27a0ecSDave Kleikamp } 1021ac27a0ecSDave Kleikamp 102251cc5068SAlexey Dobriyan static void init_once(void *foo) 1023ac27a0ecSDave Kleikamp { 1024617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1025ac27a0ecSDave Kleikamp 1026ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 102703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1028ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 1029ac27a0ecSDave Kleikamp #endif 10300e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1031ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1032ac27a0ecSDave Kleikamp } 1033ac27a0ecSDave Kleikamp 1034ac27a0ecSDave Kleikamp static int init_inodecache(void) 1035ac27a0ecSDave Kleikamp { 1036617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 1037617ba13bSMingming Cao sizeof(struct ext4_inode_info), 1038ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 1039ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 104020c2df83SPaul Mundt init_once); 1041617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1042ac27a0ecSDave Kleikamp return -ENOMEM; 1043ac27a0ecSDave Kleikamp return 0; 1044ac27a0ecSDave Kleikamp } 1045ac27a0ecSDave Kleikamp 1046ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1047ac27a0ecSDave Kleikamp { 1048617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1049ac27a0ecSDave Kleikamp } 1050ac27a0ecSDave Kleikamp 10510930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1052ac27a0ecSDave Kleikamp { 10530930fcc1SAl Viro invalidate_inode_buffers(inode); 10540930fcc1SAl Viro end_writeback(inode); 10559f754758SChristoph Hellwig dquot_drop(inode); 1056c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 10578aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10588aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10598aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10608aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10618aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10628aefcd55STheodore Ts'o } 1063ac27a0ecSDave Kleikamp } 1064ac27a0ecSDave Kleikamp 10651b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10661b961ac0SChristoph Hellwig u64 ino, u32 generation) 1067ac27a0ecSDave Kleikamp { 1068ac27a0ecSDave Kleikamp struct inode *inode; 1069ac27a0ecSDave Kleikamp 1070617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1071ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1072617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1073ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1074ac27a0ecSDave Kleikamp 1075ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1076ac27a0ecSDave Kleikamp * 1077617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1078ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1079ac27a0ecSDave Kleikamp * 1080ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1081ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1082ac27a0ecSDave Kleikamp */ 10831d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10841d1fe1eeSDavid Howells if (IS_ERR(inode)) 10851d1fe1eeSDavid Howells return ERR_CAST(inode); 10861d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1087ac27a0ecSDave Kleikamp iput(inode); 1088ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1089ac27a0ecSDave Kleikamp } 10901b961ac0SChristoph Hellwig 10911b961ac0SChristoph Hellwig return inode; 1092ac27a0ecSDave Kleikamp } 10931b961ac0SChristoph Hellwig 10941b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10951b961ac0SChristoph Hellwig int fh_len, int fh_type) 10961b961ac0SChristoph Hellwig { 10971b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10981b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10991b961ac0SChristoph Hellwig } 11001b961ac0SChristoph Hellwig 11011b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11021b961ac0SChristoph Hellwig int fh_len, int fh_type) 11031b961ac0SChristoph Hellwig { 11041b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11051b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1106ac27a0ecSDave Kleikamp } 1107ac27a0ecSDave Kleikamp 1108c39a7f84SToshiyuki Okajima /* 1109c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1110c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1111c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1112c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1113c39a7f84SToshiyuki Okajima */ 11140b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11150b8e58a1SAndreas Dilger gfp_t wait) 1116c39a7f84SToshiyuki Okajima { 1117c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1118c39a7f84SToshiyuki Okajima 1119c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1120c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1121c39a7f84SToshiyuki Okajima return 0; 1122c39a7f84SToshiyuki Okajima if (journal) 1123c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1124c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1125c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1126c39a7f84SToshiyuki Okajima } 1127c39a7f84SToshiyuki Okajima 1128ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1129ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1130ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1131ac27a0ecSDave Kleikamp 1132617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1133617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1134617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1135617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1136617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11376f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1138f00c9e44SJan Kara struct path *path); 1139ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1140617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1141617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1142ac27a0ecSDave Kleikamp size_t len, loff_t off); 1143617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1144ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1145ac27a0ecSDave Kleikamp 114661e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 114760e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1148617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1149617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1150617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1151617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1152a5b5ee32SJan Kara .write_info = ext4_write_info, 1153a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1154a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1155ac27a0ecSDave Kleikamp }; 1156ac27a0ecSDave Kleikamp 11570d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1158617ba13bSMingming Cao .quota_on = ext4_quota_on, 1159ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1160287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1161287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1162287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1163287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1164287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1165ac27a0ecSDave Kleikamp }; 1166ac27a0ecSDave Kleikamp #endif 1167ac27a0ecSDave Kleikamp 1168ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1169617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1170617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1171617ba13bSMingming Cao .write_inode = ext4_write_inode, 1172617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11737ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11740930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1175617ba13bSMingming Cao .put_super = ext4_put_super, 1176617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1177c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1178c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1179617ba13bSMingming Cao .statfs = ext4_statfs, 1180617ba13bSMingming Cao .remount_fs = ext4_remount, 1181617ba13bSMingming Cao .show_options = ext4_show_options, 1182ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1183617ba13bSMingming Cao .quota_read = ext4_quota_read, 1184617ba13bSMingming Cao .quota_write = ext4_quota_write, 1185ac27a0ecSDave Kleikamp #endif 1186c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1187ac27a0ecSDave Kleikamp }; 1188ac27a0ecSDave Kleikamp 11899ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11909ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11919ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11929ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11939ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11947ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11950930fcc1SAl Viro .evict_inode = ext4_evict_inode, 11969ca92389STheodore Ts'o .write_super = ext4_write_super, 11979ca92389STheodore Ts'o .put_super = ext4_put_super, 11989ca92389STheodore Ts'o .statfs = ext4_statfs, 11999ca92389STheodore Ts'o .remount_fs = ext4_remount, 12009ca92389STheodore Ts'o .show_options = ext4_show_options, 12019ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 12029ca92389STheodore Ts'o .quota_read = ext4_quota_read, 12039ca92389STheodore Ts'o .quota_write = ext4_quota_write, 12049ca92389STheodore Ts'o #endif 12059ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 12069ca92389STheodore Ts'o }; 12079ca92389STheodore Ts'o 120839655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12091b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12101b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1211617ba13bSMingming Cao .get_parent = ext4_get_parent, 1212ac27a0ecSDave Kleikamp }; 1213ac27a0ecSDave Kleikamp 1214ac27a0ecSDave Kleikamp enum { 1215ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1216ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 121772578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1218ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 121972578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 122030773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 122143e625d8SEric Sandeen Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, 1222ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1223296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1224ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 12255a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1226ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1227661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 12281449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 12291449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 12305328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1231744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1232fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1233ac27a0ecSDave Kleikamp }; 1234ac27a0ecSDave Kleikamp 1235a447c093SSteven Whitehouse static const match_table_t tokens = { 1236ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1237ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1238ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1239ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1240ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1241ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1242ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1243ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1244ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1245ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1246ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1247ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1248ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1249ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 125072578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 125172578c33STheodore Ts'o {Opt_removed, "orlov"}, 1252ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1253ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1254ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1255ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1256e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 12575a916be1STheodore Ts'o {Opt_noload, "noload"}, 125872578c33STheodore Ts'o {Opt_removed, "nobh"}, 125972578c33STheodore Ts'o {Opt_removed, "bh"}, 1260ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 126130773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 126230773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1263ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1264818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1265818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1266ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1267ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1268ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1269ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12705bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12715bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1272ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1273ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1274ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1275ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1276ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1277ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12785a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1279ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1280ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1281ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1282ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1283ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 128406705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 128506705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 128625ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1287c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 128864769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1289dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 12901449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 12911449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 12926fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12936fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1294240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1295b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1296afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 129706705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 129806705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1299744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1300744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13015328e635SEric Sandeen {Opt_discard, "discard"}, 13025328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1303fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1304fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1305fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1306c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1307c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1308c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1309c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1310c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1311f3f12faaSJosef Bacik {Opt_err, NULL}, 1312ac27a0ecSDave Kleikamp }; 1313ac27a0ecSDave Kleikamp 1314617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1315ac27a0ecSDave Kleikamp { 1316617ba13bSMingming Cao ext4_fsblk_t sb_block; 1317ac27a0ecSDave Kleikamp char *options = (char *) *data; 1318ac27a0ecSDave Kleikamp 1319ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1320ac27a0ecSDave Kleikamp return 1; /* Default location */ 13210b8e58a1SAndreas Dilger 1322ac27a0ecSDave Kleikamp options += 3; 13230b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1324ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1325ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13264776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1327ac27a0ecSDave Kleikamp (char *) *data); 1328ac27a0ecSDave Kleikamp return 1; 1329ac27a0ecSDave Kleikamp } 1330ac27a0ecSDave Kleikamp if (*options == ',') 1331ac27a0ecSDave Kleikamp options++; 1332ac27a0ecSDave Kleikamp *data = (void *) options; 13330b8e58a1SAndreas Dilger 1334ac27a0ecSDave Kleikamp return sb_block; 1335ac27a0ecSDave Kleikamp } 1336ac27a0ecSDave Kleikamp 1337b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1338437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1339437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1340b3881f74STheodore Ts'o 134156c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 134256c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 134356c50f11SDmitry Monakhov { 134456c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 134556c50f11SDmitry Monakhov char *qname; 134656c50f11SDmitry Monakhov 134756c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 134856c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 134956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 135056c50f11SDmitry Monakhov "Cannot change journaled " 135156c50f11SDmitry Monakhov "quota options when quota turned on"); 135257f73c2cSTheodore Ts'o return -1; 135356c50f11SDmitry Monakhov } 135456c50f11SDmitry Monakhov qname = match_strdup(args); 135556c50f11SDmitry Monakhov if (!qname) { 135656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 135756c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 135857f73c2cSTheodore Ts'o return -1; 135956c50f11SDmitry Monakhov } 136056c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 136156c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 136256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 136356c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 136456c50f11SDmitry Monakhov kfree(qname); 136557f73c2cSTheodore Ts'o return -1; 136656c50f11SDmitry Monakhov } 136756c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 136856c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 136956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 137056c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 137156c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 137256c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 137357f73c2cSTheodore Ts'o return -1; 137456c50f11SDmitry Monakhov } 1375fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 137656c50f11SDmitry Monakhov return 1; 137756c50f11SDmitry Monakhov } 137856c50f11SDmitry Monakhov 137956c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 138056c50f11SDmitry Monakhov { 138156c50f11SDmitry Monakhov 138256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 138356c50f11SDmitry Monakhov 138456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 138556c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 138656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 138756c50f11SDmitry Monakhov " when quota turned on"); 138857f73c2cSTheodore Ts'o return -1; 138956c50f11SDmitry Monakhov } 139056c50f11SDmitry Monakhov /* 139156c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 139256c50f11SDmitry Monakhov * to be correct 139356c50f11SDmitry Monakhov */ 139456c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 139556c50f11SDmitry Monakhov return 1; 139656c50f11SDmitry Monakhov } 139756c50f11SDmitry Monakhov #endif 139856c50f11SDmitry Monakhov 139926092bf5STheodore Ts'o #define MOPT_SET 0x0001 140026092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 140126092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 140226092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 140326092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 140426092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 140526092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 140626092bf5STheodore Ts'o #define MOPT_Q 0 140726092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 140826092bf5STheodore Ts'o #else 140926092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 141026092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 141126092bf5STheodore Ts'o #endif 141226092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 141326092bf5STheodore Ts'o 141426092bf5STheodore Ts'o static const struct mount_opts { 141526092bf5STheodore Ts'o int token; 141626092bf5STheodore Ts'o int mount_opt; 141726092bf5STheodore Ts'o int flags; 141826092bf5STheodore Ts'o } ext4_mount_opts[] = { 141926092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 142026092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 142126092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 142226092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 142326092bf5STheodore Ts'o {Opt_mblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_SET}, 142426092bf5STheodore Ts'o {Opt_nomblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_CLEAR}, 142526092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 142626092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 142726092bf5STheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_SET}, 142826092bf5STheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_CLEAR}, 142926092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 143026092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 143126092bf5STheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, MOPT_SET | MOPT_EXPLICIT}, 143226092bf5STheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, MOPT_CLEAR | MOPT_EXPLICIT}, 143326092bf5STheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, MOPT_SET}, 143426092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 143526092bf5STheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), MOPT_SET}, 143626092bf5STheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_SET}, 143726092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 143826092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 143926092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 144026092bf5STheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_SET}, 144126092bf5STheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_CLEAR}, 144226092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 144326092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 144426092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 144526092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 144626092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 144726092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 144826092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 144926092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 145026092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 145126092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 145226092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 145326092bf5STheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ}, 145426092bf5STheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ}, 145526092bf5STheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ}, 145626092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 145726092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 145826092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 145926092bf5STheodore Ts'o #else 146026092bf5STheodore Ts'o {Opt_user_xattr, 0, MOPT_NOSUPPORT}, 146126092bf5STheodore Ts'o {Opt_nouser_xattr, 0, MOPT_NOSUPPORT}, 146226092bf5STheodore Ts'o #endif 146326092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 146426092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 146526092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 146626092bf5STheodore Ts'o #else 146726092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 146826092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 146926092bf5STheodore Ts'o #endif 147026092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 147126092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 147226092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 147326092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 147426092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 147526092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 147626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 147726092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 147826092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 147926092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 148026092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 148126092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 148226092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 148326092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 148426092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 148526092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 148626092bf5STheodore Ts'o {Opt_err, 0, 0} 148726092bf5STheodore Ts'o }; 148826092bf5STheodore Ts'o 148926092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 149026092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 149126092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 149226092bf5STheodore Ts'o { 149326092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 149426092bf5STheodore Ts'o const struct mount_opts *m; 149526092bf5STheodore Ts'o int arg = 0; 149626092bf5STheodore Ts'o 149757f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 149857f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 149957f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 150057f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 150157f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 150257f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 150357f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 150457f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 150557f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 150657f73c2cSTheodore Ts'o #endif 150726092bf5STheodore Ts'o if (args->from && match_int(args, &arg)) 150826092bf5STheodore Ts'o return -1; 150926092bf5STheodore Ts'o switch (token) { 1510f7048605STheodore Ts'o case Opt_noacl: 1511f7048605STheodore Ts'o case Opt_nouser_xattr: 1512f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1513f7048605STheodore Ts'o break; 151426092bf5STheodore Ts'o case Opt_sb: 151526092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 151626092bf5STheodore Ts'o case Opt_removed: 151726092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 151826092bf5STheodore Ts'o "Ignoring removed %s option", opt); 151926092bf5STheodore Ts'o return 1; 152026092bf5STheodore Ts'o case Opt_resuid: 152126092bf5STheodore Ts'o sbi->s_resuid = arg; 152226092bf5STheodore Ts'o return 1; 152326092bf5STheodore Ts'o case Opt_resgid: 152426092bf5STheodore Ts'o sbi->s_resgid = arg; 152526092bf5STheodore Ts'o return 1; 152626092bf5STheodore Ts'o case Opt_abort: 152726092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 152826092bf5STheodore Ts'o return 1; 152926092bf5STheodore Ts'o case Opt_i_version: 153026092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 153126092bf5STheodore Ts'o return 1; 153226092bf5STheodore Ts'o case Opt_journal_dev: 153326092bf5STheodore Ts'o if (is_remount) { 153426092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 153526092bf5STheodore Ts'o "Cannot specify journal on remount"); 153626092bf5STheodore Ts'o return -1; 153726092bf5STheodore Ts'o } 153826092bf5STheodore Ts'o *journal_devnum = arg; 153926092bf5STheodore Ts'o return 1; 154026092bf5STheodore Ts'o case Opt_journal_ioprio: 154126092bf5STheodore Ts'o if (arg < 0 || arg > 7) 154226092bf5STheodore Ts'o return -1; 154326092bf5STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 154426092bf5STheodore Ts'o return 1; 154526092bf5STheodore Ts'o } 154626092bf5STheodore Ts'o 154726092bf5STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 154826092bf5STheodore Ts'o if (token != m->token) 154926092bf5STheodore Ts'o continue; 155026092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 155126092bf5STheodore Ts'o return -1; 155226092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 155326092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 155426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 155526092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 155626092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 155726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 155826092bf5STheodore Ts'o "options when quota turned on"); 155926092bf5STheodore Ts'o return -1; 156026092bf5STheodore Ts'o } 156126092bf5STheodore Ts'o 156226092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 156326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 156426092bf5STheodore Ts'o } else if (token == Opt_commit) { 156526092bf5STheodore Ts'o if (arg == 0) 156626092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 156726092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 156826092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 156926092bf5STheodore Ts'o if (arg == 0) 157026092bf5STheodore Ts'o arg = EXT4_DEF_MAX_BATCH_TIME; 157126092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 157226092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 157326092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 157426092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 157526092bf5STheodore Ts'o if (arg > (1 << 30)) 157626092bf5STheodore Ts'o return -1; 157726092bf5STheodore Ts'o if (arg && !is_power_of_2(arg)) { 157826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 157926092bf5STheodore Ts'o "EXT4-fs: inode_readahead_blks" 158026092bf5STheodore Ts'o " must be a power of 2"); 158126092bf5STheodore Ts'o return -1; 158226092bf5STheodore Ts'o } 158326092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 158426092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 158526092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 158626092bf5STheodore Ts'o if (!args->from) 158726092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 158826092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 158926092bf5STheodore Ts'o } else if (token == Opt_stripe) { 159026092bf5STheodore Ts'o sbi->s_stripe = arg; 159126092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 159226092bf5STheodore Ts'o if (is_remount) { 159326092bf5STheodore Ts'o if (!sbi->s_journal) 159426092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 159526092bf5STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) != 159626092bf5STheodore Ts'o m->mount_opt) { 159726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 159826092bf5STheodore Ts'o "Cannot change data mode on remount"); 159926092bf5STheodore Ts'o return -1; 160026092bf5STheodore Ts'o } 160126092bf5STheodore Ts'o } else { 160226092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 160326092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 160426092bf5STheodore Ts'o } 160526092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 160626092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 160726092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 160826092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 160926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot " 161026092bf5STheodore Ts'o "change journaled quota options " 161126092bf5STheodore Ts'o "when quota turned on"); 161226092bf5STheodore Ts'o return -1; 161326092bf5STheodore Ts'o } 161426092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 161526092bf5STheodore Ts'o #endif 161626092bf5STheodore Ts'o } else { 161726092bf5STheodore Ts'o if (!args->from) 161826092bf5STheodore Ts'o arg = 1; 161926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 162026092bf5STheodore Ts'o arg = !arg; 162126092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 162226092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 162326092bf5STheodore Ts'o "buggy handling of option %s", opt); 162426092bf5STheodore Ts'o WARN_ON(1); 162526092bf5STheodore Ts'o return -1; 162626092bf5STheodore Ts'o } 162726092bf5STheodore Ts'o if (arg != 0) 162826092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 162926092bf5STheodore Ts'o else 163026092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 163126092bf5STheodore Ts'o } 163226092bf5STheodore Ts'o return 1; 163326092bf5STheodore Ts'o } 163426092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 163526092bf5STheodore Ts'o "or missing value", opt); 163626092bf5STheodore Ts'o return -1; 163726092bf5STheodore Ts'o } 163826092bf5STheodore Ts'o 1639ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1640c3191067STheodore Ts'o unsigned long *journal_devnum, 1641b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1642661aa520SEric Sandeen int is_remount) 1643ac27a0ecSDave Kleikamp { 1644db7e5c66SEldad Zack #ifdef CONFIG_QUOTA 1645617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1646db7e5c66SEldad Zack #endif 1647ac27a0ecSDave Kleikamp char *p; 1648ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 164926092bf5STheodore Ts'o int token; 1650ac27a0ecSDave Kleikamp 1651ac27a0ecSDave Kleikamp if (!options) 1652ac27a0ecSDave Kleikamp return 1; 1653ac27a0ecSDave Kleikamp 1654ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1655ac27a0ecSDave Kleikamp if (!*p) 1656ac27a0ecSDave Kleikamp continue; 165715121c18SEric Sandeen /* 165815121c18SEric Sandeen * Initialize args struct so we know whether arg was 165915121c18SEric Sandeen * found; some options take optional arguments. 166015121c18SEric Sandeen */ 166126092bf5STheodore Ts'o args[0].to = args[0].from = 0; 1662ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 166326092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 166426092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1665ac27a0ecSDave Kleikamp return 0; 1666ac27a0ecSDave Kleikamp } 1667ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1668ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1669482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1670fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1671ac27a0ecSDave Kleikamp 1672482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1673fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1674ac27a0ecSDave Kleikamp 167556c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1676b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1677b31e1552SEric Sandeen "format mixing"); 1678ac27a0ecSDave Kleikamp return 0; 1679ac27a0ecSDave Kleikamp } 1680ac27a0ecSDave Kleikamp 1681ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1682b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1683b31e1552SEric Sandeen "not specified"); 1684ac27a0ecSDave Kleikamp return 0; 1685ac27a0ecSDave Kleikamp } 1686ac27a0ecSDave Kleikamp } else { 1687ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1688b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 16892c8be6b2SJan Kara "specified with no journaling " 1690b31e1552SEric Sandeen "enabled"); 1691ac27a0ecSDave Kleikamp return 0; 1692ac27a0ecSDave Kleikamp } 1693ac27a0ecSDave Kleikamp } 1694ac27a0ecSDave Kleikamp #endif 1695ac27a0ecSDave Kleikamp return 1; 1696ac27a0ecSDave Kleikamp } 1697ac27a0ecSDave Kleikamp 16982adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 16992adf6da8STheodore Ts'o struct super_block *sb) 17002adf6da8STheodore Ts'o { 17012adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17022adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17032adf6da8STheodore Ts'o 17042adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17052adf6da8STheodore Ts'o char *fmtname = ""; 17062adf6da8STheodore Ts'o 17072adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17082adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17092adf6da8STheodore Ts'o fmtname = "vfsold"; 17102adf6da8STheodore Ts'o break; 17112adf6da8STheodore Ts'o case QFMT_VFS_V0: 17122adf6da8STheodore Ts'o fmtname = "vfsv0"; 17132adf6da8STheodore Ts'o break; 17142adf6da8STheodore Ts'o case QFMT_VFS_V1: 17152adf6da8STheodore Ts'o fmtname = "vfsv1"; 17162adf6da8STheodore Ts'o break; 17172adf6da8STheodore Ts'o } 17182adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17192adf6da8STheodore Ts'o } 17202adf6da8STheodore Ts'o 17212adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17222adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17232adf6da8STheodore Ts'o 17242adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17252adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17262adf6da8STheodore Ts'o 17272adf6da8STheodore Ts'o if (test_opt(sb, USRQUOTA)) 17282adf6da8STheodore Ts'o seq_puts(seq, ",usrquota"); 17292adf6da8STheodore Ts'o 17302adf6da8STheodore Ts'o if (test_opt(sb, GRPQUOTA)) 17312adf6da8STheodore Ts'o seq_puts(seq, ",grpquota"); 17322adf6da8STheodore Ts'o #endif 17332adf6da8STheodore Ts'o } 17342adf6da8STheodore Ts'o 17355a916be1STheodore Ts'o static const char *token2str(int token) 17365a916be1STheodore Ts'o { 17375a916be1STheodore Ts'o static const struct match_token *t; 17385a916be1STheodore Ts'o 17395a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17405a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17415a916be1STheodore Ts'o break; 17425a916be1STheodore Ts'o return t->pattern; 17435a916be1STheodore Ts'o } 17445a916be1STheodore Ts'o 17452adf6da8STheodore Ts'o /* 17462adf6da8STheodore Ts'o * Show an option if 17472adf6da8STheodore Ts'o * - it's set to a non-default value OR 17482adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17492adf6da8STheodore Ts'o */ 175066acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 175166acdcf4STheodore Ts'o int nodefs) 17522adf6da8STheodore Ts'o { 17532adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17542adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 175566acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17565a916be1STheodore Ts'o const struct mount_opts *m; 175766acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17582adf6da8STheodore Ts'o 175966acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 176066acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17612adf6da8STheodore Ts'o 17622adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17635a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17645a916be1STheodore Ts'o 17655a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17665a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17675a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17685a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17695a916be1STheodore Ts'o continue; 177066acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17715a916be1STheodore Ts'o continue; /* skip if same as the default */ 17725a916be1STheodore Ts'o if ((want_set && 17735a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17745a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17755a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17765a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17775a916be1STheodore Ts'o } 17785a916be1STheodore Ts'o 177966acdcf4STheodore Ts'o if (nodefs || sbi->s_resuid != EXT4_DEF_RESUID || 17805a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 17815a916be1STheodore Ts'o SEQ_OPTS_PRINT("resuid=%u", sbi->s_resuid); 178266acdcf4STheodore Ts'o if (nodefs || sbi->s_resgid != EXT4_DEF_RESGID || 17835a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 17845a916be1STheodore Ts'o SEQ_OPTS_PRINT("resgid=%u", sbi->s_resgid); 178566acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 17865a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 17875a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 17882adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 17895a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 17902adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 17915a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 179266acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 17935a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 179466acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 17955a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 179666acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 17975a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 17982adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 17995a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 180066acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18015a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 180266acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18032adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18045a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18052adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18065a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18072adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18085a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18095a916be1STheodore Ts'o } 181066acdcf4STheodore Ts'o if (nodefs || 181166acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18125a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18132adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18142adf6da8STheodore Ts'o 181566acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 181666acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18175a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 18182adf6da8STheodore Ts'o 18192adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18202adf6da8STheodore Ts'o return 0; 18212adf6da8STheodore Ts'o } 18222adf6da8STheodore Ts'o 182366acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 182466acdcf4STheodore Ts'o { 182566acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 182666acdcf4STheodore Ts'o } 182766acdcf4STheodore Ts'o 182866acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 182966acdcf4STheodore Ts'o { 183066acdcf4STheodore Ts'o struct super_block *sb = seq->private; 183166acdcf4STheodore Ts'o int rc; 183266acdcf4STheodore Ts'o 183366acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 183466acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 183566acdcf4STheodore Ts'o seq_puts(seq, "\n"); 183666acdcf4STheodore Ts'o return rc; 183766acdcf4STheodore Ts'o } 183866acdcf4STheodore Ts'o 183966acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 184066acdcf4STheodore Ts'o { 184166acdcf4STheodore Ts'o return single_open(file, options_seq_show, PDE(inode)->data); 184266acdcf4STheodore Ts'o } 184366acdcf4STheodore Ts'o 184466acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 184566acdcf4STheodore Ts'o .owner = THIS_MODULE, 184666acdcf4STheodore Ts'o .open = options_open_fs, 184766acdcf4STheodore Ts'o .read = seq_read, 184866acdcf4STheodore Ts'o .llseek = seq_lseek, 184966acdcf4STheodore Ts'o .release = single_release, 185066acdcf4STheodore Ts'o }; 185166acdcf4STheodore Ts'o 1852617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1853ac27a0ecSDave Kleikamp int read_only) 1854ac27a0ecSDave Kleikamp { 1855617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1856ac27a0ecSDave Kleikamp int res = 0; 1857ac27a0ecSDave Kleikamp 1858617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1859b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1860b31e1552SEric Sandeen "forcing read-only mode"); 1861ac27a0ecSDave Kleikamp res = MS_RDONLY; 1862ac27a0ecSDave Kleikamp } 1863ac27a0ecSDave Kleikamp if (read_only) 1864281b5995STheodore Ts'o goto done; 1865617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1866b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1867b31e1552SEric Sandeen "running e2fsck is recommended"); 1868617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1869b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1870b31e1552SEric Sandeen "warning: mounting fs with errors, " 1871b31e1552SEric Sandeen "running e2fsck is recommended"); 1872ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1873ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1874ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1875b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1876b31e1552SEric Sandeen "warning: maximal mount count reached, " 1877b31e1552SEric Sandeen "running e2fsck is recommended"); 1878ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1879ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1880ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1881b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1882b31e1552SEric Sandeen "warning: checktime reached, " 1883b31e1552SEric Sandeen "running e2fsck is recommended"); 18840390131bSFrank Mayhar if (!sbi->s_journal) 1885216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1886ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1887617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1888e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1889ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1890617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 18910390131bSFrank Mayhar if (sbi->s_journal) 1892617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1893ac27a0ecSDave Kleikamp 1894e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1895281b5995STheodore Ts'o done: 1896ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1897a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1898a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1899ac27a0ecSDave Kleikamp sb->s_blocksize, 1900ac27a0ecSDave Kleikamp sbi->s_groups_count, 1901617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1902617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1903a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1904ac27a0ecSDave Kleikamp 19057abc52c2SDan Magenheimer cleancache_init_fs(sb); 1906ac27a0ecSDave Kleikamp return res; 1907ac27a0ecSDave Kleikamp } 1908ac27a0ecSDave Kleikamp 1909772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1910772cb7c8SJose R. Santos { 1911772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1912772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1913772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1914772cb7c8SJose R. Santos ext4_group_t flex_group; 1915d50f2ab6SXi Wang unsigned int groups_per_flex = 0; 1916c5ca7c76STheodore Ts'o size_t size; 1917772cb7c8SJose R. Santos int i; 1918772cb7c8SJose R. Santos 1919503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1920d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1921772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1922772cb7c8SJose R. Santos return 1; 1923772cb7c8SJose R. Santos } 1924d50f2ab6SXi Wang groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1925772cb7c8SJose R. Santos 1926c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1927c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1928d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1929d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1930c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 19319933fc0aSTheodore Ts'o sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); 1932c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 19339933fc0aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", 193494de56abSJoe Perches flex_group_count); 1935772cb7c8SJose R. Santos goto failed; 1936772cb7c8SJose R. Santos } 1937772cb7c8SJose R. Santos 1938772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 193988b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1940772cb7c8SJose R. Santos 1941772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19427ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19437ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 1944021b65bbSTheodore Ts'o atomic_add(ext4_free_group_clusters(sb, gdp), 194524aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19467ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19477ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1948772cb7c8SJose R. Santos } 1949772cb7c8SJose R. Santos 1950772cb7c8SJose R. Santos return 1; 1951772cb7c8SJose R. Santos failed: 1952772cb7c8SJose R. Santos return 0; 1953772cb7c8SJose R. Santos } 1954772cb7c8SJose R. Santos 1955*feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1956717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1957717d50e4SAndreas Dilger { 1958*feb0ab32SDarrick J. Wong int offset; 1959717d50e4SAndreas Dilger __u16 crc = 0; 1960717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1961717d50e4SAndreas Dilger 1962*feb0ab32SDarrick J. Wong if ((sbi->s_es->s_feature_ro_compat & 1963*feb0ab32SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { 1964*feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1965*feb0ab32SDarrick J. Wong __u16 old_csum; 1966*feb0ab32SDarrick J. Wong __u32 csum32; 1967*feb0ab32SDarrick J. Wong 1968*feb0ab32SDarrick J. Wong old_csum = gdp->bg_checksum; 1969*feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 1970*feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 1971*feb0ab32SDarrick J. Wong sizeof(le_group)); 1972*feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 1973*feb0ab32SDarrick J. Wong sbi->s_desc_size); 1974*feb0ab32SDarrick J. Wong gdp->bg_checksum = old_csum; 1975*feb0ab32SDarrick J. Wong 1976*feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 1977*feb0ab32SDarrick J. Wong goto out; 1978*feb0ab32SDarrick J. Wong } 1979*feb0ab32SDarrick J. Wong 1980*feb0ab32SDarrick J. Wong /* old crc16 code */ 1981*feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 1982*feb0ab32SDarrick J. Wong 1983717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1984717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1985717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1986717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1987717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1988717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1989717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1990717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1991717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1992717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1993717d50e4SAndreas Dilger offset); 1994717d50e4SAndreas Dilger 1995*feb0ab32SDarrick J. Wong out: 1996717d50e4SAndreas Dilger return cpu_to_le16(crc); 1997717d50e4SAndreas Dilger } 1998717d50e4SAndreas Dilger 1999*feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2000717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2001717d50e4SAndreas Dilger { 2002*feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2003*feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2004*feb0ab32SDarrick J. Wong block_group, gdp))) 2005717d50e4SAndreas Dilger return 0; 2006717d50e4SAndreas Dilger 2007717d50e4SAndreas Dilger return 1; 2008717d50e4SAndreas Dilger } 2009717d50e4SAndreas Dilger 2010*feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2011*feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2012*feb0ab32SDarrick J. Wong { 2013*feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2014*feb0ab32SDarrick J. Wong return; 2015*feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2016*feb0ab32SDarrick J. Wong } 2017*feb0ab32SDarrick J. Wong 2018ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2019bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2020bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2021ac27a0ecSDave Kleikamp { 2022617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2023617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2024617ba13bSMingming Cao ext4_fsblk_t last_block; 2025bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2026bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2027bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2028ce421581SJose R. Santos int flexbg_flag = 0; 2029bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2030ac27a0ecSDave Kleikamp 2031ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2032ce421581SJose R. Santos flexbg_flag = 1; 2033ce421581SJose R. Santos 2034617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2035ac27a0ecSDave Kleikamp 2036197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2037197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2038197cd65aSAkinobu Mita 2039ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2040bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2041ac27a0ecSDave Kleikamp else 2042ac27a0ecSDave Kleikamp last_block = first_block + 2043617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2044ac27a0ecSDave Kleikamp 2045bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2046bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2047bfff6873SLukas Czerner grp = i; 2048bfff6873SLukas Czerner 20498fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20502b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2051b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2052a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2053b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2054ac27a0ecSDave Kleikamp return 0; 2055ac27a0ecSDave Kleikamp } 20568fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20572b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2058b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2059a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2060b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2061ac27a0ecSDave Kleikamp return 0; 2062ac27a0ecSDave Kleikamp } 20638fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2064bd81d8eeSLaurent Vivier if (inode_table < first_block || 20652b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2066b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2067a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2068b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2069ac27a0ecSDave Kleikamp return 0; 2070ac27a0ecSDave Kleikamp } 2071955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2072*feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2073b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2074b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2075fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2076fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20777ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2078955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2079717d50e4SAndreas Dilger return 0; 2080717d50e4SAndreas Dilger } 20817ee1ec4cSLi Zefan } 2082955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2083ce421581SJose R. Santos if (!flexbg_flag) 2084617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2085ac27a0ecSDave Kleikamp } 2086bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2087bfff6873SLukas Czerner *first_not_zeroed = grp; 2088ac27a0ecSDave Kleikamp 20895dee5437STheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 20905dee5437STheodore Ts'o EXT4_C2B(sbi, ext4_count_free_clusters(sb))); 2091617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2092ac27a0ecSDave Kleikamp return 1; 2093ac27a0ecSDave Kleikamp } 2094ac27a0ecSDave Kleikamp 2095617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2096ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2097ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2098ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2099ac27a0ecSDave Kleikamp * 2100ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2101ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2102ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2103ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2104ac27a0ecSDave Kleikamp * 2105ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2106ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2107ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2108617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2109ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2110ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2111ac27a0ecSDave Kleikamp */ 2112617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2113617ba13bSMingming Cao struct ext4_super_block *es) 2114ac27a0ecSDave Kleikamp { 2115ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2116ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2117ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2118ac27a0ecSDave Kleikamp int i; 2119ac27a0ecSDave Kleikamp #endif 2120ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2121ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2122ac27a0ecSDave Kleikamp return; 2123ac27a0ecSDave Kleikamp } 2124ac27a0ecSDave Kleikamp 2125a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2126b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2127b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2128a8f48a95SEric Sandeen return; 2129a8f48a95SEric Sandeen } 2130a8f48a95SEric Sandeen 2131d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2132d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2133d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2134d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2135d39195c3SAmir Goldstein return; 2136d39195c3SAmir Goldstein } 2137d39195c3SAmir Goldstein 2138617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2139ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2140ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2141ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2142ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2143ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2144ac27a0ecSDave Kleikamp return; 2145ac27a0ecSDave Kleikamp } 2146ac27a0ecSDave Kleikamp 2147ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2148b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2149ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2150ac27a0ecSDave Kleikamp } 2151ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2152ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2153ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2154ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2155ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2156617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2157617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2158ac27a0ecSDave Kleikamp if (ret < 0) 2159b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2160b31e1552SEric Sandeen "Cannot turn on journaled " 2161b31e1552SEric Sandeen "quota: error %d", ret); 2162ac27a0ecSDave Kleikamp } 2163ac27a0ecSDave Kleikamp } 2164ac27a0ecSDave Kleikamp #endif 2165ac27a0ecSDave Kleikamp 2166ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2167ac27a0ecSDave Kleikamp struct inode *inode; 2168ac27a0ecSDave Kleikamp 216997bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 217097bd42b9SJosef Bacik if (IS_ERR(inode)) { 2171ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2172ac27a0ecSDave Kleikamp break; 2173ac27a0ecSDave Kleikamp } 2174ac27a0ecSDave Kleikamp 2175617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2176871a2931SChristoph Hellwig dquot_initialize(inode); 2177ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2178b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2179b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 218046e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2181e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2182ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2183617ba13bSMingming Cao ext4_truncate(inode); 2184ac27a0ecSDave Kleikamp nr_truncates++; 2185ac27a0ecSDave Kleikamp } else { 2186b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2187b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 218846e665e9SHarvey Harrison __func__, inode->i_ino); 2189ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2190ac27a0ecSDave Kleikamp inode->i_ino); 2191ac27a0ecSDave Kleikamp nr_orphans++; 2192ac27a0ecSDave Kleikamp } 2193ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2194ac27a0ecSDave Kleikamp } 2195ac27a0ecSDave Kleikamp 2196ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2197ac27a0ecSDave Kleikamp 2198ac27a0ecSDave Kleikamp if (nr_orphans) 2199b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2200b31e1552SEric Sandeen PLURAL(nr_orphans)); 2201ac27a0ecSDave Kleikamp if (nr_truncates) 2202b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2203b31e1552SEric Sandeen PLURAL(nr_truncates)); 2204ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2205ac27a0ecSDave Kleikamp /* Turn quotas off */ 2206ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2207ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2208287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2209ac27a0ecSDave Kleikamp } 2210ac27a0ecSDave Kleikamp #endif 2211ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2212ac27a0ecSDave Kleikamp } 22130b8e58a1SAndreas Dilger 2214cd2291a4SEric Sandeen /* 2215cd2291a4SEric Sandeen * Maximal extent format file size. 2216cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2217cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2218cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2219cd2291a4SEric Sandeen * so that won't be a limiting factor. 2220cd2291a4SEric Sandeen * 2221f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2222f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2223f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2224f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2225f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2226f17722f9SLukas Czerner * 2227cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2228cd2291a4SEric Sandeen */ 2229f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2230cd2291a4SEric Sandeen { 2231cd2291a4SEric Sandeen loff_t res; 2232cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2233cd2291a4SEric Sandeen 2234cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2235f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2236cd2291a4SEric Sandeen /* 223790c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2238cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2239cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2240cd2291a4SEric Sandeen */ 2241cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2242cd2291a4SEric Sandeen 2243cd2291a4SEric Sandeen /* total blocks in file system block size */ 2244cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2245cd2291a4SEric Sandeen upper_limit <<= blkbits; 2246cd2291a4SEric Sandeen } 2247cd2291a4SEric Sandeen 2248f17722f9SLukas Czerner /* 2249f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2250f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2251f17722f9SLukas Czerner * size 2252f17722f9SLukas Czerner */ 2253f17722f9SLukas Czerner res = (1LL << 32) - 1; 2254cd2291a4SEric Sandeen res <<= blkbits; 2255cd2291a4SEric Sandeen 2256cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2257cd2291a4SEric Sandeen if (res > upper_limit) 2258cd2291a4SEric Sandeen res = upper_limit; 2259cd2291a4SEric Sandeen 2260cd2291a4SEric Sandeen return res; 2261cd2291a4SEric Sandeen } 2262ac27a0ecSDave Kleikamp 2263ac27a0ecSDave Kleikamp /* 2264cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22650fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22660fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2267ac27a0ecSDave Kleikamp */ 2268f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2269ac27a0ecSDave Kleikamp { 2270617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22710fc1b451SAneesh Kumar K.V int meta_blocks; 22720fc1b451SAneesh Kumar K.V loff_t upper_limit; 22730b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22740b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22750b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22760b8e58a1SAndreas Dilger * 22770b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22780b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 22790fc1b451SAneesh Kumar K.V */ 22800fc1b451SAneesh Kumar K.V 2281f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 22820fc1b451SAneesh Kumar K.V /* 228390c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 22840b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 22850b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 22860fc1b451SAneesh Kumar K.V */ 22870fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 22880fc1b451SAneesh Kumar K.V 22890fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 22900fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 22910fc1b451SAneesh Kumar K.V 22920fc1b451SAneesh Kumar K.V } else { 22938180a562SAneesh Kumar K.V /* 22948180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 22958180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 22968180a562SAneesh Kumar K.V * represent total number of blocks in 22978180a562SAneesh Kumar K.V * file system block size 22988180a562SAneesh Kumar K.V */ 22990fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23000fc1b451SAneesh Kumar K.V 23010fc1b451SAneesh Kumar K.V } 23020fc1b451SAneesh Kumar K.V 23030fc1b451SAneesh Kumar K.V /* indirect blocks */ 23040fc1b451SAneesh Kumar K.V meta_blocks = 1; 23050fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23060fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23070fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23080fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23090fc1b451SAneesh Kumar K.V 23100fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23110fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2312ac27a0ecSDave Kleikamp 2313ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2314ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2315ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2316ac27a0ecSDave Kleikamp res <<= bits; 2317ac27a0ecSDave Kleikamp if (res > upper_limit) 2318ac27a0ecSDave Kleikamp res = upper_limit; 23190fc1b451SAneesh Kumar K.V 23200fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23210fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23220fc1b451SAneesh Kumar K.V 2323ac27a0ecSDave Kleikamp return res; 2324ac27a0ecSDave Kleikamp } 2325ac27a0ecSDave Kleikamp 2326617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 232770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2328ac27a0ecSDave Kleikamp { 2329617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2330fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2331ac27a0ecSDave Kleikamp int has_super = 0; 2332ac27a0ecSDave Kleikamp 2333ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2334ac27a0ecSDave Kleikamp 2335617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2336ac27a0ecSDave Kleikamp nr < first_meta_bg) 233770bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2338ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2339617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2340ac27a0ecSDave Kleikamp has_super = 1; 23410b8e58a1SAndreas Dilger 2342617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2343ac27a0ecSDave Kleikamp } 2344ac27a0ecSDave Kleikamp 2345c9de560dSAlex Tomas /** 2346c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2347c9de560dSAlex Tomas * @sbi: In memory super block info 2348c9de560dSAlex Tomas * 2349c9de560dSAlex Tomas * If we have specified it via mount option, then 2350c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2351c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2352c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2353c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2354c9de560dSAlex Tomas * 2355c9de560dSAlex Tomas */ 2356c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2357c9de560dSAlex Tomas { 2358c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2359c9de560dSAlex Tomas unsigned long stripe_width = 2360c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 23613eb08658SDan Ehrenberg int ret; 2362c9de560dSAlex Tomas 2363c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 23643eb08658SDan Ehrenberg ret = sbi->s_stripe; 23653eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 23663eb08658SDan Ehrenberg ret = stripe_width; 23673eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 23683eb08658SDan Ehrenberg ret = stride; 23693eb08658SDan Ehrenberg else 23703eb08658SDan Ehrenberg ret = 0; 2371c9de560dSAlex Tomas 23723eb08658SDan Ehrenberg /* 23733eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 23743eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 23753eb08658SDan Ehrenberg */ 23763eb08658SDan Ehrenberg if (ret <= 1) 23773eb08658SDan Ehrenberg ret = 0; 2378c9de560dSAlex Tomas 23793eb08658SDan Ehrenberg return ret; 2380c9de560dSAlex Tomas } 2381ac27a0ecSDave Kleikamp 23823197ebdbSTheodore Ts'o /* sysfs supprt */ 23833197ebdbSTheodore Ts'o 23843197ebdbSTheodore Ts'o struct ext4_attr { 23853197ebdbSTheodore Ts'o struct attribute attr; 23863197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 23873197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 23883197ebdbSTheodore Ts'o const char *, size_t); 23893197ebdbSTheodore Ts'o int offset; 23903197ebdbSTheodore Ts'o }; 23913197ebdbSTheodore Ts'o 23923197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 23933197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 23943197ebdbSTheodore Ts'o { 23953197ebdbSTheodore Ts'o char *endp; 23963197ebdbSTheodore Ts'o 2397e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2398e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 23993197ebdbSTheodore Ts'o if (*endp || *value > max) 24003197ebdbSTheodore Ts'o return -EINVAL; 24013197ebdbSTheodore Ts'o 24023197ebdbSTheodore Ts'o return 0; 24033197ebdbSTheodore Ts'o } 24043197ebdbSTheodore Ts'o 24053197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24063197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24073197ebdbSTheodore Ts'o char *buf) 24083197ebdbSTheodore Ts'o { 24093197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24107b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24117b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24123197ebdbSTheodore Ts'o } 24133197ebdbSTheodore Ts'o 24143197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24153197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24163197ebdbSTheodore Ts'o { 24173197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24183197ebdbSTheodore Ts'o 2419f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2420f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24213197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24223197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24233197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24243197ebdbSTheodore Ts'o } 24253197ebdbSTheodore Ts'o 24263197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24273197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24283197ebdbSTheodore Ts'o { 24293197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24303197ebdbSTheodore Ts'o 2431f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2432f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24333197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2434a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24353197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2436a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24373197ebdbSTheodore Ts'o } 24383197ebdbSTheodore Ts'o 24393197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24403197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24413197ebdbSTheodore Ts'o const char *buf, size_t count) 24423197ebdbSTheodore Ts'o { 24433197ebdbSTheodore Ts'o unsigned long t; 24443197ebdbSTheodore Ts'o 24453197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 24463197ebdbSTheodore Ts'o return -EINVAL; 24473197ebdbSTheodore Ts'o 24485dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 24493197ebdbSTheodore Ts'o return -EINVAL; 24503197ebdbSTheodore Ts'o 24513197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24523197ebdbSTheodore Ts'o return count; 24533197ebdbSTheodore Ts'o } 24543197ebdbSTheodore Ts'o 24553197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24563197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24573197ebdbSTheodore Ts'o { 24583197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24593197ebdbSTheodore Ts'o 24603197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24613197ebdbSTheodore Ts'o } 24623197ebdbSTheodore Ts'o 24633197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 24643197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24653197ebdbSTheodore Ts'o const char *buf, size_t count) 24663197ebdbSTheodore Ts'o { 24673197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24683197ebdbSTheodore Ts'o unsigned long t; 24693197ebdbSTheodore Ts'o 24703197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24713197ebdbSTheodore Ts'o return -EINVAL; 24723197ebdbSTheodore Ts'o *ui = t; 24733197ebdbSTheodore Ts'o return count; 24743197ebdbSTheodore Ts'o } 24753197ebdbSTheodore Ts'o 24763197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 24773197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 24783197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 24793197ebdbSTheodore Ts'o .show = _show, \ 24803197ebdbSTheodore Ts'o .store = _store, \ 24813197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 24823197ebdbSTheodore Ts'o } 24833197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 24843197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 24853197ebdbSTheodore Ts'o 2486857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 24873197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 24883197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 24893197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 24903197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 24913197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 24923197ebdbSTheodore Ts'o 24933197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 24943197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 24953197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 24963197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 24973197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 249811013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 24993197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 25003197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 25013197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 25023197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 25033197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 25043197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 250555138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 25063197ebdbSTheodore Ts'o 25073197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 25083197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 25093197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 25103197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 25113197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 251211013911SAndreas Dilger ATTR_LIST(inode_goal), 25133197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 25143197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 25153197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 25163197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 25173197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 25183197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 251955138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 25203197ebdbSTheodore Ts'o NULL, 25213197ebdbSTheodore Ts'o }; 25223197ebdbSTheodore Ts'o 2523857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2524857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 252527ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2526857ac889SLukas Czerner 2527857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2528857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 252927ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2530857ac889SLukas Czerner NULL, 2531857ac889SLukas Czerner }; 2532857ac889SLukas Czerner 25333197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 25343197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 25353197ebdbSTheodore Ts'o { 25363197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25373197ebdbSTheodore Ts'o s_kobj); 25383197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25393197ebdbSTheodore Ts'o 25403197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 25413197ebdbSTheodore Ts'o } 25423197ebdbSTheodore Ts'o 25433197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 25443197ebdbSTheodore Ts'o struct attribute *attr, 25453197ebdbSTheodore Ts'o const char *buf, size_t len) 25463197ebdbSTheodore Ts'o { 25473197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25483197ebdbSTheodore Ts'o s_kobj); 25493197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25503197ebdbSTheodore Ts'o 25513197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 25523197ebdbSTheodore Ts'o } 25533197ebdbSTheodore Ts'o 25543197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 25553197ebdbSTheodore Ts'o { 25563197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25573197ebdbSTheodore Ts'o s_kobj); 25583197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 25593197ebdbSTheodore Ts'o } 25603197ebdbSTheodore Ts'o 256152cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 25623197ebdbSTheodore Ts'o .show = ext4_attr_show, 25633197ebdbSTheodore Ts'o .store = ext4_attr_store, 25643197ebdbSTheodore Ts'o }; 25653197ebdbSTheodore Ts'o 25663197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 25673197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 25683197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 25693197ebdbSTheodore Ts'o .release = ext4_sb_release, 25703197ebdbSTheodore Ts'o }; 25713197ebdbSTheodore Ts'o 2572857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2573857ac889SLukas Czerner { 2574857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2575857ac889SLukas Czerner } 2576857ac889SLukas Czerner 2577857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2578857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2579857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2580857ac889SLukas Czerner .release = ext4_feat_release, 2581857ac889SLukas Czerner }; 2582857ac889SLukas Czerner 2583a13fb1a4SEric Sandeen /* 2584a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2585a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2586a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2587a13fb1a4SEric Sandeen * 0 if it cannot be. 2588a13fb1a4SEric Sandeen */ 2589a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2590a13fb1a4SEric Sandeen { 2591a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2592a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2593a13fb1a4SEric Sandeen "Couldn't mount because of " 2594a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2595a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2596a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2597a13fb1a4SEric Sandeen return 0; 2598a13fb1a4SEric Sandeen } 2599a13fb1a4SEric Sandeen 2600a13fb1a4SEric Sandeen if (readonly) 2601a13fb1a4SEric Sandeen return 1; 2602a13fb1a4SEric Sandeen 2603a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2604a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2605a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2606a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2607a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2608a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2609a13fb1a4SEric Sandeen return 0; 2610a13fb1a4SEric Sandeen } 2611a13fb1a4SEric Sandeen /* 2612a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2613a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2614a13fb1a4SEric Sandeen */ 2615a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2616a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2617a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2618a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2619a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2620a13fb1a4SEric Sandeen return 0; 2621a13fb1a4SEric Sandeen } 2622a13fb1a4SEric Sandeen } 2623bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2624bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2625bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2626bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2627bab08ab9STheodore Ts'o "extents feature\n"); 2628bab08ab9STheodore Ts'o return 0; 2629bab08ab9STheodore Ts'o } 2630a13fb1a4SEric Sandeen return 1; 2631a13fb1a4SEric Sandeen } 2632a13fb1a4SEric Sandeen 263366e61a9eSTheodore Ts'o /* 263466e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 263566e61a9eSTheodore Ts'o * on the file system 263666e61a9eSTheodore Ts'o */ 263766e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 263866e61a9eSTheodore Ts'o { 263966e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 264066e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 264166e61a9eSTheodore Ts'o struct ext4_super_block *es; 264266e61a9eSTheodore Ts'o 264366e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 264466e61a9eSTheodore Ts'o es = sbi->s_es; 264566e61a9eSTheodore Ts'o 264666e61a9eSTheodore Ts'o if (es->s_error_count) 264766e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 264866e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 264966e61a9eSTheodore Ts'o if (es->s_first_error_time) { 265066e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 265166e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 265266e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 265366e61a9eSTheodore Ts'o es->s_first_error_func, 265466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 265566e61a9eSTheodore Ts'o if (es->s_first_error_ino) 265666e61a9eSTheodore Ts'o printk(": inode %u", 265766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 265866e61a9eSTheodore Ts'o if (es->s_first_error_block) 265966e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 266066e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 266166e61a9eSTheodore Ts'o printk("\n"); 266266e61a9eSTheodore Ts'o } 266366e61a9eSTheodore Ts'o if (es->s_last_error_time) { 266466e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 266566e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 266666e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 266766e61a9eSTheodore Ts'o es->s_last_error_func, 266866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 266966e61a9eSTheodore Ts'o if (es->s_last_error_ino) 267066e61a9eSTheodore Ts'o printk(": inode %u", 267166e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 267266e61a9eSTheodore Ts'o if (es->s_last_error_block) 267366e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 267466e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 267566e61a9eSTheodore Ts'o printk("\n"); 267666e61a9eSTheodore Ts'o } 267766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 267866e61a9eSTheodore Ts'o } 267966e61a9eSTheodore Ts'o 2680bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2681bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2682bfff6873SLukas Czerner { 2683bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2684bfff6873SLukas Czerner ext4_group_t group, ngroups; 2685bfff6873SLukas Czerner struct super_block *sb; 2686bfff6873SLukas Czerner unsigned long timeout = 0; 2687bfff6873SLukas Czerner int ret = 0; 2688bfff6873SLukas Czerner 2689bfff6873SLukas Czerner sb = elr->lr_super; 2690bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2691bfff6873SLukas Czerner 2692bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2693bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2694bfff6873SLukas Czerner if (!gdp) { 2695bfff6873SLukas Czerner ret = 1; 2696bfff6873SLukas Czerner break; 2697bfff6873SLukas Czerner } 2698bfff6873SLukas Czerner 2699bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2700bfff6873SLukas Czerner break; 2701bfff6873SLukas Czerner } 2702bfff6873SLukas Czerner 2703bfff6873SLukas Czerner if (group == ngroups) 2704bfff6873SLukas Czerner ret = 1; 2705bfff6873SLukas Czerner 2706bfff6873SLukas Czerner if (!ret) { 2707bfff6873SLukas Czerner timeout = jiffies; 2708bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2709bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2710bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 271151ce6511SLukas Czerner timeout = (jiffies - timeout) * 271251ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2713bfff6873SLukas Czerner elr->lr_timeout = timeout; 2714bfff6873SLukas Czerner } 2715bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2716bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2717bfff6873SLukas Czerner } 2718bfff6873SLukas Czerner 2719bfff6873SLukas Czerner return ret; 2720bfff6873SLukas Czerner } 2721bfff6873SLukas Czerner 2722bfff6873SLukas Czerner /* 2723bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 27244ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2725bfff6873SLukas Czerner */ 2726bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2727bfff6873SLukas Czerner { 2728bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2729bfff6873SLukas Czerner 2730bfff6873SLukas Czerner if (!elr) 2731bfff6873SLukas Czerner return; 2732bfff6873SLukas Czerner 2733bfff6873SLukas Czerner sbi = elr->lr_sbi; 2734bfff6873SLukas Czerner 2735bfff6873SLukas Czerner list_del(&elr->lr_request); 2736bfff6873SLukas Czerner sbi->s_li_request = NULL; 2737bfff6873SLukas Czerner kfree(elr); 2738bfff6873SLukas Czerner } 2739bfff6873SLukas Czerner 2740bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2741bfff6873SLukas Czerner { 27421bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 27431bb933fbSLukas Czerner if (!ext4_li_info) { 27441bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2745bfff6873SLukas Czerner return; 27461bb933fbSLukas Czerner } 2747bfff6873SLukas Czerner 2748bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 27491bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2750bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 27511bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2752bfff6873SLukas Czerner } 2753bfff6873SLukas Czerner 27548f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 27558f1f7453SEric Sandeen 2756bfff6873SLukas Czerner /* 2757bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2758bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2759bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2760bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2761bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2762bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2763bfff6873SLukas Czerner * next waking time and put itself into sleep. 2764bfff6873SLukas Czerner */ 2765bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2766bfff6873SLukas Czerner { 2767bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2768bfff6873SLukas Czerner struct list_head *pos, *n; 2769bfff6873SLukas Czerner struct ext4_li_request *elr; 27704ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2771bfff6873SLukas Czerner 2772bfff6873SLukas Czerner BUG_ON(NULL == eli); 2773bfff6873SLukas Czerner 2774bfff6873SLukas Czerner cont_thread: 2775bfff6873SLukas Czerner while (true) { 2776bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2777bfff6873SLukas Czerner 2778bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2779bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2780bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2781bfff6873SLukas Czerner goto exit_thread; 2782bfff6873SLukas Czerner } 2783bfff6873SLukas Czerner 2784bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2785bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2786bfff6873SLukas Czerner lr_request); 2787bfff6873SLukas Czerner 2788b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2789b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2790b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2791bfff6873SLukas Czerner ext4_remove_li_request(elr); 2792bfff6873SLukas Czerner continue; 2793bfff6873SLukas Czerner } 2794b2c78cd0STheodore Ts'o } 2795bfff6873SLukas Czerner 2796bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2797bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2798bfff6873SLukas Czerner } 2799bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2800bfff6873SLukas Czerner 2801a0acae0eSTejun Heo try_to_freeze(); 2802bfff6873SLukas Czerner 28034ed5c033SLukas Czerner cur = jiffies; 28044ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2805f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2806bfff6873SLukas Czerner cond_resched(); 2807bfff6873SLukas Czerner continue; 2808bfff6873SLukas Czerner } 2809bfff6873SLukas Czerner 28104ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 28114ed5c033SLukas Czerner 28128f1f7453SEric Sandeen if (kthread_should_stop()) { 28138f1f7453SEric Sandeen ext4_clear_request_list(); 28148f1f7453SEric Sandeen goto exit_thread; 28158f1f7453SEric Sandeen } 2816bfff6873SLukas Czerner } 2817bfff6873SLukas Czerner 2818bfff6873SLukas Czerner exit_thread: 2819bfff6873SLukas Czerner /* 2820bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2821bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2822bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2823bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2824bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2825bfff6873SLukas Czerner * new one. 2826bfff6873SLukas Czerner */ 2827bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2828bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2829bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2830bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2831bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2832bfff6873SLukas Czerner goto cont_thread; 2833bfff6873SLukas Czerner } 2834bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2835bfff6873SLukas Czerner kfree(ext4_li_info); 2836bfff6873SLukas Czerner ext4_li_info = NULL; 2837bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2838bfff6873SLukas Czerner 2839bfff6873SLukas Czerner return 0; 2840bfff6873SLukas Czerner } 2841bfff6873SLukas Czerner 2842bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2843bfff6873SLukas Czerner { 2844bfff6873SLukas Czerner struct list_head *pos, *n; 2845bfff6873SLukas Czerner struct ext4_li_request *elr; 2846bfff6873SLukas Czerner 2847bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2848bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2849bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2850bfff6873SLukas Czerner lr_request); 2851bfff6873SLukas Czerner ext4_remove_li_request(elr); 2852bfff6873SLukas Czerner } 2853bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2854bfff6873SLukas Czerner } 2855bfff6873SLukas Czerner 2856bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2857bfff6873SLukas Czerner { 28588f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 28598f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 28608f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 28618f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2862bfff6873SLukas Czerner ext4_clear_request_list(); 2863bfff6873SLukas Czerner kfree(ext4_li_info); 2864bfff6873SLukas Czerner ext4_li_info = NULL; 286592b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2866bfff6873SLukas Czerner "initialization thread\n", 2867bfff6873SLukas Czerner err); 2868bfff6873SLukas Czerner return err; 2869bfff6873SLukas Czerner } 2870bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2871bfff6873SLukas Czerner return 0; 2872bfff6873SLukas Czerner } 2873bfff6873SLukas Czerner 2874bfff6873SLukas Czerner /* 2875bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2876bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2877bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2878bfff6873SLukas Czerner * groups and return total number of groups. 2879bfff6873SLukas Czerner */ 2880bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2881bfff6873SLukas Czerner { 2882bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2883bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2884bfff6873SLukas Czerner 2885bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2886bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2887bfff6873SLukas Czerner if (!gdp) 2888bfff6873SLukas Czerner continue; 2889bfff6873SLukas Czerner 2890bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2891bfff6873SLukas Czerner break; 2892bfff6873SLukas Czerner } 2893bfff6873SLukas Czerner 2894bfff6873SLukas Czerner return group; 2895bfff6873SLukas Czerner } 2896bfff6873SLukas Czerner 2897bfff6873SLukas Czerner static int ext4_li_info_new(void) 2898bfff6873SLukas Czerner { 2899bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2900bfff6873SLukas Czerner 2901bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2902bfff6873SLukas Czerner if (!eli) 2903bfff6873SLukas Czerner return -ENOMEM; 2904bfff6873SLukas Czerner 2905bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2906bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2907bfff6873SLukas Czerner 2908bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2909bfff6873SLukas Czerner 2910bfff6873SLukas Czerner ext4_li_info = eli; 2911bfff6873SLukas Czerner 2912bfff6873SLukas Czerner return 0; 2913bfff6873SLukas Czerner } 2914bfff6873SLukas Czerner 2915bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2916bfff6873SLukas Czerner ext4_group_t start) 2917bfff6873SLukas Czerner { 2918bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2919bfff6873SLukas Czerner struct ext4_li_request *elr; 2920bfff6873SLukas Czerner unsigned long rnd; 2921bfff6873SLukas Czerner 2922bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2923bfff6873SLukas Czerner if (!elr) 2924bfff6873SLukas Czerner return NULL; 2925bfff6873SLukas Czerner 2926bfff6873SLukas Czerner elr->lr_super = sb; 2927bfff6873SLukas Czerner elr->lr_sbi = sbi; 2928bfff6873SLukas Czerner elr->lr_next_group = start; 2929bfff6873SLukas Czerner 2930bfff6873SLukas Czerner /* 2931bfff6873SLukas Czerner * Randomize first schedule time of the request to 2932bfff6873SLukas Czerner * spread the inode table initialization requests 2933bfff6873SLukas Czerner * better. 2934bfff6873SLukas Czerner */ 2935bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2936bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2937bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2938bfff6873SLukas Czerner 2939bfff6873SLukas Czerner return elr; 2940bfff6873SLukas Czerner } 2941bfff6873SLukas Czerner 2942bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 2943bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2944bfff6873SLukas Czerner { 2945bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2946bfff6873SLukas Czerner struct ext4_li_request *elr; 2947bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 29486c5a6cb9SAndrew Morton int ret = 0; 2949bfff6873SLukas Czerner 295051ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 295151ce6511SLukas Czerner /* 295251ce6511SLukas Czerner * Reset timeout so it can be computed again, because 295351ce6511SLukas Czerner * s_li_wait_mult might have changed. 295451ce6511SLukas Czerner */ 295551ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 2956beed5ecbSNicolas Kaiser return 0; 295751ce6511SLukas Czerner } 2958bfff6873SLukas Czerner 2959bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2960bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 296155ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 2962beed5ecbSNicolas Kaiser return 0; 2963bfff6873SLukas Czerner 2964bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 2965beed5ecbSNicolas Kaiser if (!elr) 2966beed5ecbSNicolas Kaiser return -ENOMEM; 2967bfff6873SLukas Czerner 2968bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2969bfff6873SLukas Czerner 2970bfff6873SLukas Czerner if (NULL == ext4_li_info) { 2971bfff6873SLukas Czerner ret = ext4_li_info_new(); 2972bfff6873SLukas Czerner if (ret) 2973bfff6873SLukas Czerner goto out; 2974bfff6873SLukas Czerner } 2975bfff6873SLukas Czerner 2976bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2977bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 2978bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2979bfff6873SLukas Czerner 2980bfff6873SLukas Czerner sbi->s_li_request = elr; 298146e4690bSTao Ma /* 298246e4690bSTao Ma * set elr to NULL here since it has been inserted to 298346e4690bSTao Ma * the request_list and the removal and free of it is 298446e4690bSTao Ma * handled by ext4_clear_request_list from now on. 298546e4690bSTao Ma */ 298646e4690bSTao Ma elr = NULL; 2987bfff6873SLukas Czerner 2988bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 2989bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 2990bfff6873SLukas Czerner if (ret) 2991bfff6873SLukas Czerner goto out; 2992bfff6873SLukas Czerner } 2993bfff6873SLukas Czerner out: 2994bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2995beed5ecbSNicolas Kaiser if (ret) 2996bfff6873SLukas Czerner kfree(elr); 2997bfff6873SLukas Czerner return ret; 2998bfff6873SLukas Czerner } 2999bfff6873SLukas Czerner 3000bfff6873SLukas Czerner /* 3001bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3002bfff6873SLukas Czerner * module unload. 3003bfff6873SLukas Czerner */ 3004bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3005bfff6873SLukas Czerner { 3006bfff6873SLukas Czerner /* 3007bfff6873SLukas Czerner * If thread exited earlier 3008bfff6873SLukas Czerner * there's nothing to be done. 3009bfff6873SLukas Czerner */ 30108f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3011bfff6873SLukas Czerner return; 3012bfff6873SLukas Czerner 30138f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3014bfff6873SLukas Czerner } 3015bfff6873SLukas Czerner 3016617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3017ac27a0ecSDave Kleikamp { 3018d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3019ac27a0ecSDave Kleikamp struct buffer_head *bh; 3020617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3021617ba13bSMingming Cao struct ext4_sb_info *sbi; 3022617ba13bSMingming Cao ext4_fsblk_t block; 3023617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 302470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3025ac27a0ecSDave Kleikamp unsigned long offset = 0; 3026ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3027ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3028ac27a0ecSDave Kleikamp struct inode *root; 30299f6200bbSTheodore Ts'o char *cp; 30300390131bSFrank Mayhar const char *descr; 3031dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3032281b5995STheodore Ts'o int blocksize, clustersize; 30334ec11028STheodore Ts'o unsigned int db_count; 30344ec11028STheodore Ts'o unsigned int i; 3035281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3036bd81d8eeSLaurent Vivier __u64 blocks_count; 3037833f4077SPeter Zijlstra int err; 3038b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3039bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3040ac27a0ecSDave Kleikamp 3041ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3042ac27a0ecSDave Kleikamp if (!sbi) 3043dcc7dae3SCyrill Gorcunov goto out_free_orig; 3044705895b6SPekka Enberg 3045705895b6SPekka Enberg sbi->s_blockgroup_lock = 3046705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3047705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3048705895b6SPekka Enberg kfree(sbi); 3049dcc7dae3SCyrill Gorcunov goto out_free_orig; 3050705895b6SPekka Enberg } 3051ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 3052ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 3053617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 3054617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 3055240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3056d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3057f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3058f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3059f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3060ac27a0ecSDave Kleikamp 30619f6200bbSTheodore Ts'o /* Cleanup superblock name */ 30629f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 30639f6200bbSTheodore Ts'o *cp = '!'; 30649f6200bbSTheodore Ts'o 3065dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3066617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3067ac27a0ecSDave Kleikamp if (!blocksize) { 3068b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3069ac27a0ecSDave Kleikamp goto out_fail; 3070ac27a0ecSDave Kleikamp } 3071ac27a0ecSDave Kleikamp 3072ac27a0ecSDave Kleikamp /* 3073617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3074ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3075ac27a0ecSDave Kleikamp */ 3076617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 307770bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 307870bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3079ac27a0ecSDave Kleikamp } else { 308070bbb3e0SAndrew Morton logical_sb_block = sb_block; 3081ac27a0ecSDave Kleikamp } 3082ac27a0ecSDave Kleikamp 308370bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3084b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3085ac27a0ecSDave Kleikamp goto out_fail; 3086ac27a0ecSDave Kleikamp } 3087ac27a0ecSDave Kleikamp /* 3088ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3089617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3090ac27a0ecSDave Kleikamp */ 3091617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3092ac27a0ecSDave Kleikamp sbi->s_es = es; 3093ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3094617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3095617ba13bSMingming Cao goto cantfind_ext4; 3096afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3097ac27a0ecSDave Kleikamp 3098*feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3099*feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3100*feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3101*feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3102*feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3103*feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3104*feb0ab32SDarrick J. Wong 3105d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3106d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3107d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3108d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3109d25425f8SDarrick J. Wong silent = 1; 3110d25425f8SDarrick J. Wong goto cantfind_ext4; 3111d25425f8SDarrick J. Wong } 3112d25425f8SDarrick J. Wong 31130441984aSDarrick J. Wong /* Load the checksum driver */ 31140441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 31150441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 31160441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 31170441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 31180441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 31190441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 31200441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 31210441984aSDarrick J. Wong goto failed_mount; 31220441984aSDarrick J. Wong } 31230441984aSDarrick J. Wong } 31240441984aSDarrick J. Wong 3125a9c47317SDarrick J. Wong /* Check superblock checksum */ 3126a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3127a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3128a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3129a9c47317SDarrick J. Wong silent = 1; 3130a9c47317SDarrick J. Wong goto cantfind_ext4; 3131a9c47317SDarrick J. Wong } 3132a9c47317SDarrick J. Wong 3133a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3134a9c47317SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3135a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 3136a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3137a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3138a9c47317SDarrick J. Wong 3139ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3140ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3141fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3142617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3143fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 314487f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3145fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3146617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3147fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3148ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 314903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3150fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 31512e7842b8SHugh Dickins #endif 315203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3153fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 31542e7842b8SHugh Dickins #endif 31556fd7a467STheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 3156617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3157fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3158617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3159fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3160617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3161fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3162ac27a0ecSDave Kleikamp 3163617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3164fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3165bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3166fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3167bb4f397aSAneesh Kumar K.V else 3168fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 31698b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3170fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 31718b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3172fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3173ac27a0ecSDave Kleikamp 3174ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 3175ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 317630773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 317730773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 317830773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3179ac27a0ecSDave Kleikamp 31808b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3181fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3182ac27a0ecSDave Kleikamp 31831e2462f9SMingming Cao /* 3184dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3185dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3186dd919b98SAneesh Kumar K.V */ 31878b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 31888b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3189fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3190dd919b98SAneesh Kumar K.V 319151ce6511SLukas Czerner /* 319251ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 319351ce6511SLukas Czerner * no mount option specified. 319451ce6511SLukas Czerner */ 319551ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 319651ce6511SLukas Czerner 31978b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3198661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 31998b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 32008b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 32018b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 32028b67f04aSTheodore Ts'o } 32035a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3204b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3205661aa520SEric Sandeen &journal_ioprio, 0)) 3206ac27a0ecSDave Kleikamp goto failed_mount; 3207ac27a0ecSDave Kleikamp 320856889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 320956889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 321056889787STheodore Ts'o "with data=journal disables delayed " 321156889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 321256889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 321356889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 321456889787STheodore Ts'o "both data=journal and delalloc"); 321556889787STheodore Ts'o goto failed_mount; 321656889787STheodore Ts'o } 321756889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 321856889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 321956889787STheodore Ts'o "both data=journal and delalloc"); 322056889787STheodore Ts'o goto failed_mount; 322156889787STheodore Ts'o } 322256889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 322356889787STheodore Ts'o clear_opt(sb, DELALLOC); 322456889787STheodore Ts'o } 322556889787STheodore Ts'o 322656889787STheodore Ts'o blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 322756889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 322856889787STheodore Ts'o if (blocksize < PAGE_SIZE) { 322956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 323056889787STheodore Ts'o "dioread_nolock if block size != PAGE_SIZE"); 323156889787STheodore Ts'o goto failed_mount; 323256889787STheodore Ts'o } 323356889787STheodore Ts'o } 323456889787STheodore Ts'o 3235ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3236482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3237ac27a0ecSDave Kleikamp 3238617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3239617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3240617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3241617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3242b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3243b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3244b31e1552SEric Sandeen "running e2fsck is recommended"); 3245469108ffSTheodore Tso 32462035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 32472035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 32482035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 32492035e776STheodore Ts'o "using the ext4 subsystem"); 32502035e776STheodore Ts'o else { 32512035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 32522035e776STheodore Ts'o "to feature incompatibilities"); 32532035e776STheodore Ts'o goto failed_mount; 32542035e776STheodore Ts'o } 32552035e776STheodore Ts'o } 32562035e776STheodore Ts'o 32572035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 32582035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 32592035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 32602035e776STheodore Ts'o "using the ext4 subsystem"); 32612035e776STheodore Ts'o else { 32622035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 32632035e776STheodore Ts'o "to feature incompatibilities"); 32642035e776STheodore Ts'o goto failed_mount; 32652035e776STheodore Ts'o } 32662035e776STheodore Ts'o } 32672035e776STheodore Ts'o 3268469108ffSTheodore Tso /* 3269ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3270ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3271ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3272ac27a0ecSDave Kleikamp */ 3273a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3274ac27a0ecSDave Kleikamp goto failed_mount; 3275a13fb1a4SEric Sandeen 3276617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3277617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3278b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3279b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3280ac27a0ecSDave Kleikamp goto failed_mount; 3281ac27a0ecSDave Kleikamp } 3282ac27a0ecSDave Kleikamp 3283ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3284ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3285ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3286b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3287ce40733cSAneesh Kumar K.V blocksize); 3288ac27a0ecSDave Kleikamp goto failed_mount; 3289ac27a0ecSDave Kleikamp } 3290ac27a0ecSDave Kleikamp 3291ac27a0ecSDave Kleikamp brelse(bh); 329270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 329370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 329470bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3295ac27a0ecSDave Kleikamp if (!bh) { 3296b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3297b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3298ac27a0ecSDave Kleikamp goto failed_mount; 3299ac27a0ecSDave Kleikamp } 3300617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 3301ac27a0ecSDave Kleikamp sbi->s_es = es; 3302617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3303b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3304b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3305ac27a0ecSDave Kleikamp goto failed_mount; 3306ac27a0ecSDave Kleikamp } 3307ac27a0ecSDave Kleikamp } 3308ac27a0ecSDave Kleikamp 3309a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3310a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3311f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3312f287a1a5STheodore Ts'o has_huge_files); 3313f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3314ac27a0ecSDave Kleikamp 3315617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3316617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3317617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3318ac27a0ecSDave Kleikamp } else { 3319ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3320ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3321617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 33221330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3323ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3324b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3325b31e1552SEric Sandeen "unsupported inode size: %d", 3326ac27a0ecSDave Kleikamp sbi->s_inode_size); 3327ac27a0ecSDave Kleikamp goto failed_mount; 3328ac27a0ecSDave Kleikamp } 3329ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3330ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3331ac27a0ecSDave Kleikamp } 33320b8e58a1SAndreas Dilger 33330d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 33340d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 33358fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 33360d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3337d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3338b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3339b31e1552SEric Sandeen "unsupported descriptor size %lu", 33400d1ee42fSAlexandre Ratchov sbi->s_desc_size); 33410d1ee42fSAlexandre Ratchov goto failed_mount; 33420d1ee42fSAlexandre Ratchov } 33430d1ee42fSAlexandre Ratchov } else 33440d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 33450b8e58a1SAndreas Dilger 3346ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3347ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3348b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3349617ba13bSMingming Cao goto cantfind_ext4; 33500b8e58a1SAndreas Dilger 3351617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3352ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3353617ba13bSMingming Cao goto cantfind_ext4; 3354ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3355ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 33560d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3357ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3358ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3359e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3360e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 33610b8e58a1SAndreas Dilger 3362ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3363ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3364ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3365f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3366f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3367f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3368f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3369f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3370f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3371f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3372f99b2589STheodore Ts'o #else 3373f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3374f99b2589STheodore Ts'o #endif 3375f99b2589STheodore Ts'o } 3376ac27a0ecSDave Kleikamp 3377281b5995STheodore Ts'o /* Handle clustersize */ 3378281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3379281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3380281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3381281b5995STheodore Ts'o if (has_bigalloc) { 3382281b5995STheodore Ts'o if (clustersize < blocksize) { 3383281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3384281b5995STheodore Ts'o "cluster size (%d) smaller than " 3385281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3386281b5995STheodore Ts'o goto failed_mount; 3387281b5995STheodore Ts'o } 3388281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3389281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3390281b5995STheodore Ts'o sbi->s_clusters_per_group = 3391281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3392281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3393281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3394281b5995STheodore Ts'o "#clusters per group too big: %lu", 3395281b5995STheodore Ts'o sbi->s_clusters_per_group); 3396281b5995STheodore Ts'o goto failed_mount; 3397281b5995STheodore Ts'o } 3398281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3399281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3400281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3401281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3402281b5995STheodore Ts'o sbi->s_blocks_per_group, 3403281b5995STheodore Ts'o sbi->s_clusters_per_group); 3404281b5995STheodore Ts'o goto failed_mount; 3405281b5995STheodore Ts'o } 3406281b5995STheodore Ts'o } else { 3407281b5995STheodore Ts'o if (clustersize != blocksize) { 3408281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3409281b5995STheodore Ts'o "block size (%d)", clustersize, 3410281b5995STheodore Ts'o blocksize); 3411281b5995STheodore Ts'o clustersize = blocksize; 3412281b5995STheodore Ts'o } 3413ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3414b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3415b31e1552SEric Sandeen "#blocks per group too big: %lu", 3416ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3417ac27a0ecSDave Kleikamp goto failed_mount; 3418ac27a0ecSDave Kleikamp } 3419281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3420281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3421281b5995STheodore Ts'o } 3422281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3423281b5995STheodore Ts'o 3424ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3425b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3426b31e1552SEric Sandeen "#inodes per group too big: %lu", 3427ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3428ac27a0ecSDave Kleikamp goto failed_mount; 3429ac27a0ecSDave Kleikamp } 3430ac27a0ecSDave Kleikamp 3431bf43d84bSEric Sandeen /* 3432bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3433bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3434bf43d84bSEric Sandeen */ 34355a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 343630ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 34375a9ae68aSDarrick J. Wong if (err) { 3438b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3439bf43d84bSEric Sandeen " too large to mount safely on this system"); 3440ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 344190c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 34425a9ae68aSDarrick J. Wong ret = err; 3443ac27a0ecSDave Kleikamp goto failed_mount; 3444ac27a0ecSDave Kleikamp } 3445ac27a0ecSDave Kleikamp 3446617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3447617ba13bSMingming Cao goto cantfind_ext4; 3448e7c95593SEric Sandeen 34490f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 34500f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 34510f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3452b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3453b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 34540f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 34550f2ddca6SFrom: Thiemo Nagel goto failed_mount; 34560f2ddca6SFrom: Thiemo Nagel } 34570f2ddca6SFrom: Thiemo Nagel 34584ec11028STheodore Ts'o /* 34594ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 34604ec11028STheodore Ts'o * of the filesystem. 34614ec11028STheodore Ts'o */ 34624ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3463b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3464b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3465e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 34664ec11028STheodore Ts'o ext4_blocks_count(es)); 3467e7c95593SEric Sandeen goto failed_mount; 3468e7c95593SEric Sandeen } 3469bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3470bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3471bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3472bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 34734ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3474b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 34754ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3476b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 34774ec11028STheodore Ts'o ext4_blocks_count(es), 34784ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 34794ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 34804ec11028STheodore Ts'o goto failed_mount; 34814ec11028STheodore Ts'o } 3482bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3483fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3484fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3485617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3486617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3487f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3488f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3489ac27a0ecSDave Kleikamp GFP_KERNEL); 3490ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3491b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 3492ac27a0ecSDave Kleikamp goto failed_mount; 3493ac27a0ecSDave Kleikamp } 3494ac27a0ecSDave Kleikamp 34959f6200bbSTheodore Ts'o if (ext4_proc_root) 34969f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3497240799cdSTheodore Ts'o 349866acdcf4STheodore Ts'o if (sbi->s_proc) 349966acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 350066acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 350166acdcf4STheodore Ts'o 3502705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3503ac27a0ecSDave Kleikamp 3504ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 350570bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3506ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3507ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3508b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3509b31e1552SEric Sandeen "can't read group descriptor %d", i); 3510ac27a0ecSDave Kleikamp db_count = i; 3511ac27a0ecSDave Kleikamp goto failed_mount2; 3512ac27a0ecSDave Kleikamp } 3513ac27a0ecSDave Kleikamp } 3514bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3515b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3516ac27a0ecSDave Kleikamp goto failed_mount2; 3517ac27a0ecSDave Kleikamp } 3518772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3519772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3520b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3521b31e1552SEric Sandeen "unable to initialize " 3522b31e1552SEric Sandeen "flex_bg meta info!"); 3523772cb7c8SJose R. Santos goto failed_mount2; 3524772cb7c8SJose R. Santos } 3525772cb7c8SJose R. Santos 3526ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3527ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3528ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3529ac27a0ecSDave Kleikamp 353004496411STao Ma init_timer(&sbi->s_err_report); 353104496411STao Ma sbi->s_err_report.function = print_daily_error_info; 353204496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 353304496411STao Ma 353457042651STheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, 35355dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3536ce7e010aSTheodore Ts'o if (!err) { 3537ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3538ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3539ce7e010aSTheodore Ts'o } 3540ce7e010aSTheodore Ts'o if (!err) { 3541ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3542ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3543ce7e010aSTheodore Ts'o } 3544ce7e010aSTheodore Ts'o if (!err) { 354557042651STheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 3546ce7e010aSTheodore Ts'o } 3547ce7e010aSTheodore Ts'o if (err) { 3548ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3549ce7e010aSTheodore Ts'o goto failed_mount3; 3550ce7e010aSTheodore Ts'o } 3551ce7e010aSTheodore Ts'o 3552c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 355355138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3554c9de560dSAlex Tomas 3555ac27a0ecSDave Kleikamp /* 3556ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3557ac27a0ecSDave Kleikamp */ 35589ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 35599ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3560617ba13bSMingming Cao sb->s_op = &ext4_sops; 35619ca92389STheodore Ts'o else 35629ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3563617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3564617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3565ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3566617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3567617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3568ac27a0ecSDave Kleikamp #endif 3569f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3570f2fa2ffcSAneesh Kumar K.V 3571ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 35723b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 35738f82f840SYongqiang Yang sbi->s_resize_flags = 0; 3574ac27a0ecSDave Kleikamp 3575ac27a0ecSDave Kleikamp sb->s_root = NULL; 3576ac27a0ecSDave Kleikamp 3577ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3578617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3579617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3580ac27a0ecSDave Kleikamp 3581c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3582c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3583c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3584c5e06d10SJohann Lombardi goto failed_mount3; 3585c5e06d10SJohann Lombardi 3586ac27a0ecSDave Kleikamp /* 3587ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3588ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3589ac27a0ecSDave Kleikamp */ 3590ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3591617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3592617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3593ac27a0ecSDave Kleikamp goto failed_mount3; 35940390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 35950390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3596b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3597b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3598744692dcSJiaying Zhang goto failed_mount_wq; 3599ac27a0ecSDave Kleikamp } else { 3600fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 36010390131bSFrank Mayhar sbi->s_journal = NULL; 36020390131bSFrank Mayhar needs_recovery = 0; 36030390131bSFrank Mayhar goto no_journal; 3604ac27a0ecSDave Kleikamp } 3605ac27a0ecSDave Kleikamp 3606eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 3607eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3608eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3609b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3610744692dcSJiaying Zhang goto failed_mount_wq; 3611eb40a09cSJose R. Santos } 3612eb40a09cSJose R. Santos 3613d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 3614d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 3615d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3616d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3617d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 3618818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 3619818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 3620818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3621818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3622d4da6c9cSLinus Torvalds } else { 3623d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 3624d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3625d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3626d4da6c9cSLinus Torvalds } 3627818d276cSGirish Shilamkar 3628ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3629ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3630ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3631ac27a0ecSDave Kleikamp case 0: 3632ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 363363f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 363463f57933SAndrew Morton * cope, else JOURNAL_DATA 363563f57933SAndrew Morton */ 3636dab291afSMingming Cao if (jbd2_journal_check_available_features 3637dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3638fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3639ac27a0ecSDave Kleikamp else 3640fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3641ac27a0ecSDave Kleikamp break; 3642ac27a0ecSDave Kleikamp 3643617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3644617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3645dab291afSMingming Cao if (!jbd2_journal_check_available_features 3646dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3647b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3648b31e1552SEric Sandeen "requested data journaling mode"); 3649744692dcSJiaying Zhang goto failed_mount_wq; 3650ac27a0ecSDave Kleikamp } 3651ac27a0ecSDave Kleikamp default: 3652ac27a0ecSDave Kleikamp break; 3653ac27a0ecSDave Kleikamp } 3654b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3655ac27a0ecSDave Kleikamp 365618aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 365718aadd47SBobi Jam 3658ce7e010aSTheodore Ts'o /* 3659ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3660ce7e010aSTheodore Ts'o * need to update the global counters. 3661ce7e010aSTheodore Ts'o */ 366257042651STheodore Ts'o percpu_counter_set(&sbi->s_freeclusters_counter, 36635dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3664ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 366584061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3666ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 366784061e07SDmitry Monakhov ext4_count_dirs(sb)); 366857042651STheodore Ts'o percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); 3669206f7ab4SChristoph Hellwig 3670ce7e010aSTheodore Ts'o no_journal: 3671fd89d5f2STejun Heo /* 3672fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3673fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3674fd89d5f2STejun Heo */ 3675fd89d5f2STejun Heo EXT4_SB(sb)->dio_unwritten_wq = 3676ae005cbeSLinus Torvalds alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 36774c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 36784c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 36794c0425ffSMingming Cao goto failed_mount_wq; 36804c0425ffSMingming Cao } 36814c0425ffSMingming Cao 3682ac27a0ecSDave Kleikamp /* 3683dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3684ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3685ac27a0ecSDave Kleikamp */ 3686ac27a0ecSDave Kleikamp 36871d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 36881d1fe1eeSDavid Howells if (IS_ERR(root)) { 3689b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 36901d1fe1eeSDavid Howells ret = PTR_ERR(root); 369132a9bb57SManish Katiyar root = NULL; 3692ac27a0ecSDave Kleikamp goto failed_mount4; 3693ac27a0ecSDave Kleikamp } 3694ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3695b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 369694bf608aSAl Viro iput(root); 3697ac27a0ecSDave Kleikamp goto failed_mount4; 3698ac27a0ecSDave Kleikamp } 369948fde701SAl Viro sb->s_root = d_make_root(root); 37001d1fe1eeSDavid Howells if (!sb->s_root) { 3701b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 37021d1fe1eeSDavid Howells ret = -ENOMEM; 37031d1fe1eeSDavid Howells goto failed_mount4; 37041d1fe1eeSDavid Howells } 3705ac27a0ecSDave Kleikamp 3706617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 3707ef7f3835SKalpak Shah 3708ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3709ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3710ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3711ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3712ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3713ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3714ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3715ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3716ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3717ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3718ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3719ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3720ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3721ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3722ef7f3835SKalpak Shah } 3723ef7f3835SKalpak Shah } 3724ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3725ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3726ef7f3835SKalpak Shah sbi->s_inode_size) { 3727ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3728ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3729b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3730b31e1552SEric Sandeen "available"); 3731ef7f3835SKalpak Shah } 3732ef7f3835SKalpak Shah 37336fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 37346fd058f7STheodore Ts'o if (err) { 3735b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3736fbe845ddSCurt Wohlgemuth "zone (%d)", err); 373794bf608aSAl Viro goto failed_mount4a; 37386fd058f7STheodore Ts'o } 37396fd058f7STheodore Ts'o 3740c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3741c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3742c2774d84SAneesh Kumar K.V if (err) { 3743421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3744c2774d84SAneesh Kumar K.V err); 3745dcf2d804STao Ma goto failed_mount5; 3746c2774d84SAneesh Kumar K.V } 3747c2774d84SAneesh Kumar K.V 3748bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3749bfff6873SLukas Czerner if (err) 3750dcf2d804STao Ma goto failed_mount6; 3751bfff6873SLukas Czerner 37523197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 37533197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 37543197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 37553197ebdbSTheodore Ts'o "%s", sb->s_id); 3756dcf2d804STao Ma if (err) 3757dcf2d804STao Ma goto failed_mount7; 37583197ebdbSTheodore Ts'o 3759617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3760617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3761617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 37620390131bSFrank Mayhar if (needs_recovery) { 3763b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3764617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 37650390131bSFrank Mayhar } 37660390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 37670390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 37680390131bSFrank Mayhar descr = " journalled data mode"; 37690390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 37700390131bSFrank Mayhar descr = " ordered data mode"; 37710390131bSFrank Mayhar else 37720390131bSFrank Mayhar descr = " writeback data mode"; 37730390131bSFrank Mayhar } else 37740390131bSFrank Mayhar descr = "out journal"; 37750390131bSFrank Mayhar 3776d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 37778b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 37788b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3779ac27a0ecSDave Kleikamp 378066e61a9eSTheodore Ts'o if (es->s_error_count) 378166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3782ac27a0ecSDave Kleikamp 3783d4c402d9SCurt Wohlgemuth kfree(orig_data); 3784ac27a0ecSDave Kleikamp return 0; 3785ac27a0ecSDave Kleikamp 3786617ba13bSMingming Cao cantfind_ext4: 3787ac27a0ecSDave Kleikamp if (!silent) 3788b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3789ac27a0ecSDave Kleikamp goto failed_mount; 3790ac27a0ecSDave Kleikamp 3791dcf2d804STao Ma failed_mount7: 3792dcf2d804STao Ma ext4_unregister_li_request(sb); 3793dcf2d804STao Ma failed_mount6: 3794dcf2d804STao Ma ext4_mb_release(sb); 379594bf608aSAl Viro failed_mount5: 379694bf608aSAl Viro ext4_ext_release(sb); 3797dcf2d804STao Ma ext4_release_system_zone(sb); 379894bf608aSAl Viro failed_mount4a: 379994bf608aSAl Viro dput(sb->s_root); 380032a9bb57SManish Katiyar sb->s_root = NULL; 380194bf608aSAl Viro failed_mount4: 3802b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 38034c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 38044c0425ffSMingming Cao failed_mount_wq: 38050390131bSFrank Mayhar if (sbi->s_journal) { 3806dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 380747b4a50bSJan Kara sbi->s_journal = NULL; 38080390131bSFrank Mayhar } 3809ac27a0ecSDave Kleikamp failed_mount3: 381004496411STao Ma del_timer(&sbi->s_err_report); 38119933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 38129933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 381357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 3814ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 3815ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 381657042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 3817c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 3818c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 3819ac27a0ecSDave Kleikamp failed_mount2: 3820ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3821ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3822f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 3823ac27a0ecSDave Kleikamp failed_mount: 38240441984aSDarrick J. Wong if (sbi->s_chksum_driver) 38250441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 3826240799cdSTheodore Ts'o if (sbi->s_proc) { 382766acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 38289f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3829240799cdSTheodore Ts'o } 3830ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3831ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3832ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3833ac27a0ecSDave Kleikamp #endif 3834617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3835ac27a0ecSDave Kleikamp brelse(bh); 3836ac27a0ecSDave Kleikamp out_fail: 3837ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3838f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3839ac27a0ecSDave Kleikamp kfree(sbi); 3840dcc7dae3SCyrill Gorcunov out_free_orig: 3841d4c402d9SCurt Wohlgemuth kfree(orig_data); 38421d1fe1eeSDavid Howells return ret; 3843ac27a0ecSDave Kleikamp } 3844ac27a0ecSDave Kleikamp 3845ac27a0ecSDave Kleikamp /* 3846ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3847ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3848ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3849ac27a0ecSDave Kleikamp */ 3850617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3851ac27a0ecSDave Kleikamp { 3852617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3853ac27a0ecSDave Kleikamp 3854ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 385530773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 385630773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3857ac27a0ecSDave Kleikamp 3858a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 3859ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3860dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3861ac27a0ecSDave Kleikamp else 3862dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 38635bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 38645bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 38655bf5683aSHidehiro Kawai else 38665bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3867a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 3868ac27a0ecSDave Kleikamp } 3869ac27a0ecSDave Kleikamp 3870617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3871ac27a0ecSDave Kleikamp unsigned int journal_inum) 3872ac27a0ecSDave Kleikamp { 3873ac27a0ecSDave Kleikamp struct inode *journal_inode; 3874ac27a0ecSDave Kleikamp journal_t *journal; 3875ac27a0ecSDave Kleikamp 38760390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 38770390131bSFrank Mayhar 3878ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3879ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3880ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3881ac27a0ecSDave Kleikamp 38821d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 38831d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3884b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3885ac27a0ecSDave Kleikamp return NULL; 3886ac27a0ecSDave Kleikamp } 3887ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3888ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3889ac27a0ecSDave Kleikamp iput(journal_inode); 3890b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3891ac27a0ecSDave Kleikamp return NULL; 3892ac27a0ecSDave Kleikamp } 3893ac27a0ecSDave Kleikamp 3894e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3895ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 38961d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3897b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3898ac27a0ecSDave Kleikamp iput(journal_inode); 3899ac27a0ecSDave Kleikamp return NULL; 3900ac27a0ecSDave Kleikamp } 3901ac27a0ecSDave Kleikamp 3902dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3903ac27a0ecSDave Kleikamp if (!journal) { 3904b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3905ac27a0ecSDave Kleikamp iput(journal_inode); 3906ac27a0ecSDave Kleikamp return NULL; 3907ac27a0ecSDave Kleikamp } 3908ac27a0ecSDave Kleikamp journal->j_private = sb; 3909617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3910ac27a0ecSDave Kleikamp return journal; 3911ac27a0ecSDave Kleikamp } 3912ac27a0ecSDave Kleikamp 3913617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3914ac27a0ecSDave Kleikamp dev_t j_dev) 3915ac27a0ecSDave Kleikamp { 3916ac27a0ecSDave Kleikamp struct buffer_head *bh; 3917ac27a0ecSDave Kleikamp journal_t *journal; 3918617ba13bSMingming Cao ext4_fsblk_t start; 3919617ba13bSMingming Cao ext4_fsblk_t len; 3920ac27a0ecSDave Kleikamp int hblock, blocksize; 3921617ba13bSMingming Cao ext4_fsblk_t sb_block; 3922ac27a0ecSDave Kleikamp unsigned long offset; 3923617ba13bSMingming Cao struct ext4_super_block *es; 3924ac27a0ecSDave Kleikamp struct block_device *bdev; 3925ac27a0ecSDave Kleikamp 39260390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 39270390131bSFrank Mayhar 3928b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3929ac27a0ecSDave Kleikamp if (bdev == NULL) 3930ac27a0ecSDave Kleikamp return NULL; 3931ac27a0ecSDave Kleikamp 3932ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3933e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3934ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3935b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3936b31e1552SEric Sandeen "blocksize too small for journal device"); 3937ac27a0ecSDave Kleikamp goto out_bdev; 3938ac27a0ecSDave Kleikamp } 3939ac27a0ecSDave Kleikamp 3940617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3941617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3942ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3943ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3944b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3945b31e1552SEric Sandeen "external journal"); 3946ac27a0ecSDave Kleikamp goto out_bdev; 3947ac27a0ecSDave Kleikamp } 3948ac27a0ecSDave Kleikamp 3949617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3950617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3951ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3952617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3953b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3954b31e1552SEric Sandeen "bad superblock"); 3955ac27a0ecSDave Kleikamp brelse(bh); 3956ac27a0ecSDave Kleikamp goto out_bdev; 3957ac27a0ecSDave Kleikamp } 3958ac27a0ecSDave Kleikamp 3959617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3960b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3961ac27a0ecSDave Kleikamp brelse(bh); 3962ac27a0ecSDave Kleikamp goto out_bdev; 3963ac27a0ecSDave Kleikamp } 3964ac27a0ecSDave Kleikamp 3965bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3966ac27a0ecSDave Kleikamp start = sb_block + 1; 3967ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3968ac27a0ecSDave Kleikamp 3969dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3970ac27a0ecSDave Kleikamp start, len, blocksize); 3971ac27a0ecSDave Kleikamp if (!journal) { 3972b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3973ac27a0ecSDave Kleikamp goto out_bdev; 3974ac27a0ecSDave Kleikamp } 3975ac27a0ecSDave Kleikamp journal->j_private = sb; 3976ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3977ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3978ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3979b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3980ac27a0ecSDave Kleikamp goto out_journal; 3981ac27a0ecSDave Kleikamp } 3982ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3983b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3984b31e1552SEric Sandeen "user (unsupported) - %d", 3985ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3986ac27a0ecSDave Kleikamp goto out_journal; 3987ac27a0ecSDave Kleikamp } 3988617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3989617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3990ac27a0ecSDave Kleikamp return journal; 39910b8e58a1SAndreas Dilger 3992ac27a0ecSDave Kleikamp out_journal: 3993dab291afSMingming Cao jbd2_journal_destroy(journal); 3994ac27a0ecSDave Kleikamp out_bdev: 3995617ba13bSMingming Cao ext4_blkdev_put(bdev); 3996ac27a0ecSDave Kleikamp return NULL; 3997ac27a0ecSDave Kleikamp } 3998ac27a0ecSDave Kleikamp 3999617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4000617ba13bSMingming Cao struct ext4_super_block *es, 4001ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4002ac27a0ecSDave Kleikamp { 4003ac27a0ecSDave Kleikamp journal_t *journal; 4004ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4005ac27a0ecSDave Kleikamp dev_t journal_dev; 4006ac27a0ecSDave Kleikamp int err = 0; 4007ac27a0ecSDave Kleikamp int really_read_only; 4008ac27a0ecSDave Kleikamp 40090390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 40100390131bSFrank Mayhar 4011ac27a0ecSDave Kleikamp if (journal_devnum && 4012ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4013b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4014b31e1552SEric Sandeen "numbers have changed"); 4015ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4016ac27a0ecSDave Kleikamp } else 4017ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4018ac27a0ecSDave Kleikamp 4019ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4020ac27a0ecSDave Kleikamp 4021ac27a0ecSDave Kleikamp /* 4022ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4023ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4024ac27a0ecSDave Kleikamp * can get read-write access to the device. 4025ac27a0ecSDave Kleikamp */ 4026617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4027ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4028b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4029b31e1552SEric Sandeen "required on readonly filesystem"); 4030ac27a0ecSDave Kleikamp if (really_read_only) { 4031b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4032b31e1552SEric Sandeen "unavailable, cannot proceed"); 4033ac27a0ecSDave Kleikamp return -EROFS; 4034ac27a0ecSDave Kleikamp } 4035b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4036b31e1552SEric Sandeen "be enabled during recovery"); 4037ac27a0ecSDave Kleikamp } 4038ac27a0ecSDave Kleikamp } 4039ac27a0ecSDave Kleikamp 4040ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4041b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4042b31e1552SEric Sandeen "and inode journals!"); 4043ac27a0ecSDave Kleikamp return -EINVAL; 4044ac27a0ecSDave Kleikamp } 4045ac27a0ecSDave Kleikamp 4046ac27a0ecSDave Kleikamp if (journal_inum) { 4047617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4048ac27a0ecSDave Kleikamp return -EINVAL; 4049ac27a0ecSDave Kleikamp } else { 4050617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4051ac27a0ecSDave Kleikamp return -EINVAL; 4052ac27a0ecSDave Kleikamp } 4053ac27a0ecSDave Kleikamp 405490576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4055b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 40564776004fSTheodore Ts'o 4057617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4058dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 40591c13d5c0STheodore Ts'o if (!err) { 40601c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 40611c13d5c0STheodore Ts'o if (save) 40621c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 40631c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4064dab291afSMingming Cao err = jbd2_journal_load(journal); 40651c13d5c0STheodore Ts'o if (save) 40661c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 40671c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 40681c13d5c0STheodore Ts'o kfree(save); 40691c13d5c0STheodore Ts'o } 4070ac27a0ecSDave Kleikamp 4071ac27a0ecSDave Kleikamp if (err) { 4072b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4073dab291afSMingming Cao jbd2_journal_destroy(journal); 4074ac27a0ecSDave Kleikamp return err; 4075ac27a0ecSDave Kleikamp } 4076ac27a0ecSDave Kleikamp 4077617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4078617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4079ac27a0ecSDave Kleikamp 4080c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4081ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4082ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4083ac27a0ecSDave Kleikamp 4084ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4085e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4086ac27a0ecSDave Kleikamp } 4087ac27a0ecSDave Kleikamp 4088ac27a0ecSDave Kleikamp return 0; 4089ac27a0ecSDave Kleikamp } 4090ac27a0ecSDave Kleikamp 4091e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4092ac27a0ecSDave Kleikamp { 4093e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4094617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4095c4be0c1dSTakashi Sato int error = 0; 4096ac27a0ecSDave Kleikamp 40977c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4098c4be0c1dSTakashi Sato return error; 4099914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4100914258bfSTheodore Ts'o /* 4101914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4102914258bfSTheodore Ts'o * superblock failed. This could happen because the 4103914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4104914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4105914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4106914258bfSTheodore Ts'o * write and hope for the best. 4107914258bfSTheodore Ts'o */ 4108b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4109b31e1552SEric Sandeen "superblock detected"); 4110914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4111914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4112914258bfSTheodore Ts'o } 411371290b36STheodore Ts'o /* 411471290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 411571290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 411671290b36STheodore Ts'o * write time when we are mounting the root file system 411771290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 411871290b36STheodore Ts'o * for people who are east of GMT and who make their clock 411971290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 412071290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 412171290b36STheodore Ts'o * to complain and force a full file system check. 412271290b36STheodore Ts'o */ 412371290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4124ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4125f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4126afc32f7eSTheodore Ts'o es->s_kbytes_written = 4127afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4128afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4129afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4130f613dfcbSTheodore Ts'o else 4131f613dfcbSTheodore Ts'o es->s_kbytes_written = 4132f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 413357042651STheodore Ts'o ext4_free_blocks_count_set(es, 413457042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 413557042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 41367f93cff9STheodore Ts'o es->s_free_inodes_count = 41377f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 41385d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 41397234ab2aSTheodore Ts'o sb->s_dirt = 0; 4140ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 4141a9c47317SDarrick J. Wong ext4_superblock_csum_set(sb, es); 4142ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4143914258bfSTheodore Ts'o if (sync) { 4144c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4145c4be0c1dSTakashi Sato if (error) 4146c4be0c1dSTakashi Sato return error; 4147c4be0c1dSTakashi Sato 4148c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4149c4be0c1dSTakashi Sato if (error) { 4150b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4151b31e1552SEric Sandeen "superblock"); 4152914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4153914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4154914258bfSTheodore Ts'o } 4155914258bfSTheodore Ts'o } 4156c4be0c1dSTakashi Sato return error; 4157ac27a0ecSDave Kleikamp } 4158ac27a0ecSDave Kleikamp 4159ac27a0ecSDave Kleikamp /* 4160ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4161ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4162ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4163ac27a0ecSDave Kleikamp */ 4164617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4165617ba13bSMingming Cao struct ext4_super_block *es) 4166ac27a0ecSDave Kleikamp { 4167617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4168ac27a0ecSDave Kleikamp 41690390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 41700390131bSFrank Mayhar BUG_ON(journal != NULL); 41710390131bSFrank Mayhar return; 41720390131bSFrank Mayhar } 4173dab291afSMingming Cao jbd2_journal_lock_updates(journal); 41747ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 41757ffe1ea8SHidehiro Kawai goto out; 41767ffe1ea8SHidehiro Kawai 4177617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4178ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4179617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4180e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4181ac27a0ecSDave Kleikamp } 41827ffe1ea8SHidehiro Kawai 41837ffe1ea8SHidehiro Kawai out: 4184dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4185ac27a0ecSDave Kleikamp } 4186ac27a0ecSDave Kleikamp 4187ac27a0ecSDave Kleikamp /* 4188ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4189ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4190ac27a0ecSDave Kleikamp * main filesystem now. 4191ac27a0ecSDave Kleikamp */ 4192617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4193617ba13bSMingming Cao struct ext4_super_block *es) 4194ac27a0ecSDave Kleikamp { 4195ac27a0ecSDave Kleikamp journal_t *journal; 4196ac27a0ecSDave Kleikamp int j_errno; 4197ac27a0ecSDave Kleikamp const char *errstr; 4198ac27a0ecSDave Kleikamp 41990390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 42000390131bSFrank Mayhar 4201617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4202ac27a0ecSDave Kleikamp 4203ac27a0ecSDave Kleikamp /* 4204ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4205617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4206ac27a0ecSDave Kleikamp */ 4207ac27a0ecSDave Kleikamp 4208dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4209ac27a0ecSDave Kleikamp if (j_errno) { 4210ac27a0ecSDave Kleikamp char nbuf[16]; 4211ac27a0ecSDave Kleikamp 4212617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 421312062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4214ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 421512062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4216ac27a0ecSDave Kleikamp 4217617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4218617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4219e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4220ac27a0ecSDave Kleikamp 4221dab291afSMingming Cao jbd2_journal_clear_err(journal); 4222ac27a0ecSDave Kleikamp } 4223ac27a0ecSDave Kleikamp } 4224ac27a0ecSDave Kleikamp 4225ac27a0ecSDave Kleikamp /* 4226ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4227ac27a0ecSDave Kleikamp * and wait on the commit. 4228ac27a0ecSDave Kleikamp */ 4229617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4230ac27a0ecSDave Kleikamp { 4231ac27a0ecSDave Kleikamp journal_t *journal; 42320390131bSFrank Mayhar int ret = 0; 4233ac27a0ecSDave Kleikamp 4234ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4235ac27a0ecSDave Kleikamp return 0; 4236ac27a0ecSDave Kleikamp 4237617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 42386b0310fbSEric Sandeen if (journal) { 4239437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 4240617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 42416b0310fbSEric Sandeen } 42420390131bSFrank Mayhar 4243ac27a0ecSDave Kleikamp return ret; 4244ac27a0ecSDave Kleikamp } 4245ac27a0ecSDave Kleikamp 4246617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 4247ac27a0ecSDave Kleikamp { 4248ebc1ac16SChristoph Hellwig lock_super(sb); 4249e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4250ebc1ac16SChristoph Hellwig unlock_super(sb); 42510390131bSFrank Mayhar } 4252ac27a0ecSDave Kleikamp 4253617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4254ac27a0ecSDave Kleikamp { 425514ce0cb4STheodore Ts'o int ret = 0; 42569eddacf9SJan Kara tid_t target; 42578d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4258ac27a0ecSDave Kleikamp 42599bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 42608d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 42618d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4262ac27a0ecSDave Kleikamp if (wait) 42638d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 42640390131bSFrank Mayhar } 426514ce0cb4STheodore Ts'o return ret; 4266ac27a0ecSDave Kleikamp } 4267ac27a0ecSDave Kleikamp 4268ac27a0ecSDave Kleikamp /* 4269ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4270ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4271be4f27d3SYongqiang Yang * 4272be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 4273be4f27d3SYongqiang Yang * state independently, because ext4 prevents a new handle from being started 4274be4f27d3SYongqiang Yang * by @sb->s_frozen, which stays in an upper layer. It thus needs help from 4275be4f27d3SYongqiang Yang * the upper layer. 4276ac27a0ecSDave Kleikamp */ 4277c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4278ac27a0ecSDave Kleikamp { 4279c4be0c1dSTakashi Sato int error = 0; 4280c4be0c1dSTakashi Sato journal_t *journal; 4281ac27a0ecSDave Kleikamp 42829ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 42839ca92389STheodore Ts'o return 0; 42849ca92389STheodore Ts'o 4285c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4286ac27a0ecSDave Kleikamp 4287ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4288dab291afSMingming Cao jbd2_journal_lock_updates(journal); 42897ffe1ea8SHidehiro Kawai 42907ffe1ea8SHidehiro Kawai /* 42919ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 42929ca92389STheodore Ts'o * the journal. 42937ffe1ea8SHidehiro Kawai */ 4294c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 42956b0310fbSEric Sandeen if (error < 0) 42966b0310fbSEric Sandeen goto out; 4297ac27a0ecSDave Kleikamp 4298ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4299617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4300e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 43016b0310fbSEric Sandeen out: 43026b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 43036b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 43046b0310fbSEric Sandeen return error; 4305ac27a0ecSDave Kleikamp } 4306ac27a0ecSDave Kleikamp 4307ac27a0ecSDave Kleikamp /* 4308ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4309ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4310ac27a0ecSDave Kleikamp */ 4311c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4312ac27a0ecSDave Kleikamp { 43139ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 43149ca92389STheodore Ts'o return 0; 43159ca92389STheodore Ts'o 4316ac27a0ecSDave Kleikamp lock_super(sb); 43179ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4318617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4319e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4320ac27a0ecSDave Kleikamp unlock_super(sb); 4321c4be0c1dSTakashi Sato return 0; 4322ac27a0ecSDave Kleikamp } 4323ac27a0ecSDave Kleikamp 4324673c6100STheodore Ts'o /* 4325673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4326673c6100STheodore Ts'o */ 4327673c6100STheodore Ts'o struct ext4_mount_options { 4328673c6100STheodore Ts'o unsigned long s_mount_opt; 4329a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 4330673c6100STheodore Ts'o uid_t s_resuid; 4331673c6100STheodore Ts'o gid_t s_resgid; 4332673c6100STheodore Ts'o unsigned long s_commit_interval; 4333673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4334673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4335673c6100STheodore Ts'o int s_jquota_fmt; 4336673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4337673c6100STheodore Ts'o #endif 4338673c6100STheodore Ts'o }; 4339673c6100STheodore Ts'o 4340617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4341ac27a0ecSDave Kleikamp { 4342617ba13bSMingming Cao struct ext4_super_block *es; 4343617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4344ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4345617ba13bSMingming Cao struct ext4_mount_options old_opts; 4346c79d967dSChristoph Hellwig int enable_quota = 0; 43478a266467STheodore Ts'o ext4_group_t g; 4348b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4349c5e06d10SJohann Lombardi int err = 0; 4350ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4351ac27a0ecSDave Kleikamp int i; 4352ac27a0ecSDave Kleikamp #endif 4353d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4354ac27a0ecSDave Kleikamp 4355ac27a0ecSDave Kleikamp /* Store the original options */ 4356bbd6851aSAl Viro lock_super(sb); 4357ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4358ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4359a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4360ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4361ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4362ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 436330773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 436430773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4365ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4366ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4367ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4368ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4369ac27a0ecSDave Kleikamp #endif 4370b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4371b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4372ac27a0ecSDave Kleikamp 4373ac27a0ecSDave Kleikamp /* 4374ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4375ac27a0ecSDave Kleikamp */ 4376661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4377ac27a0ecSDave Kleikamp err = -EINVAL; 4378ac27a0ecSDave Kleikamp goto restore_opts; 4379ac27a0ecSDave Kleikamp } 4380ac27a0ecSDave Kleikamp 43814ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4382c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4383ac27a0ecSDave Kleikamp 4384ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4385482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4386ac27a0ecSDave Kleikamp 4387ac27a0ecSDave Kleikamp es = sbi->s_es; 4388ac27a0ecSDave Kleikamp 4389b3881f74STheodore Ts'o if (sbi->s_journal) { 4390617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4391b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4392b3881f74STheodore Ts'o } 4393ac27a0ecSDave Kleikamp 4394661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 43954ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4396ac27a0ecSDave Kleikamp err = -EROFS; 4397ac27a0ecSDave Kleikamp goto restore_opts; 4398ac27a0ecSDave Kleikamp } 4399ac27a0ecSDave Kleikamp 4400ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 44010f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 44020f0dd62fSChristoph Hellwig if (err < 0) 4403c79d967dSChristoph Hellwig goto restore_opts; 4404c79d967dSChristoph Hellwig 4405ac27a0ecSDave Kleikamp /* 4406ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4407ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4408ac27a0ecSDave Kleikamp */ 4409ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4410ac27a0ecSDave Kleikamp 4411ac27a0ecSDave Kleikamp /* 4412ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4413ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4414ac27a0ecSDave Kleikamp * mark the partition as valid again. 4415ac27a0ecSDave Kleikamp */ 4416617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4417617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4418ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4419ac27a0ecSDave Kleikamp 4420a63c9eb2STheodore Ts'o if (sbi->s_journal) 4421617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4422ac27a0ecSDave Kleikamp } else { 4423a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4424a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4425ac27a0ecSDave Kleikamp err = -EROFS; 4426ac27a0ecSDave Kleikamp goto restore_opts; 4427ac27a0ecSDave Kleikamp } 4428ead6596bSEric Sandeen /* 44298a266467STheodore Ts'o * Make sure the group descriptor checksums 44300b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 44318a266467STheodore Ts'o */ 44328a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 44338a266467STheodore Ts'o struct ext4_group_desc *gdp = 44348a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 44358a266467STheodore Ts'o 4436*feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4437b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4438b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 44398a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 44408a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 44418a266467STheodore Ts'o err = -EINVAL; 44428a266467STheodore Ts'o goto restore_opts; 44438a266467STheodore Ts'o } 44448a266467STheodore Ts'o } 44458a266467STheodore Ts'o 44468a266467STheodore Ts'o /* 4447ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4448ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4449ead6596bSEric Sandeen * require a full umount/remount for now. 4450ead6596bSEric Sandeen */ 4451ead6596bSEric Sandeen if (es->s_last_orphan) { 4452b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4453ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4454ead6596bSEric Sandeen "orphan inode list. Please " 4455b31e1552SEric Sandeen "umount/remount instead"); 4456ead6596bSEric Sandeen err = -EINVAL; 4457ead6596bSEric Sandeen goto restore_opts; 4458ead6596bSEric Sandeen } 4459ead6596bSEric Sandeen 4460ac27a0ecSDave Kleikamp /* 4461ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4462ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4463ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4464ac27a0ecSDave Kleikamp * the partition.) 4465ac27a0ecSDave Kleikamp */ 44660390131bSFrank Mayhar if (sbi->s_journal) 4467617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4468ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4469617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4470ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4471c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4472c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4473c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4474c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4475c5e06d10SJohann Lombardi err = -EROFS; 4476c5e06d10SJohann Lombardi goto restore_opts; 4477c5e06d10SJohann Lombardi } 4478c79d967dSChristoph Hellwig enable_quota = 1; 4479ac27a0ecSDave Kleikamp } 4480ac27a0ecSDave Kleikamp } 4481bfff6873SLukas Czerner 4482bfff6873SLukas Czerner /* 4483bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4484bfff6873SLukas Czerner * current settings 4485bfff6873SLukas Czerner */ 4486bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4487bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4488bfff6873SLukas Czerner else { 4489bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4490bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4491bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4492bfff6873SLukas Czerner } 4493bfff6873SLukas Czerner 44946fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 44950390131bSFrank Mayhar if (sbi->s_journal == NULL) 4496e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 44970390131bSFrank Mayhar 4498ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4499ac27a0ecSDave Kleikamp /* Release old quota file names */ 4500ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4501ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4502ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4503ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 4504ac27a0ecSDave Kleikamp #endif 4505bbd6851aSAl Viro unlock_super(sb); 4506c79d967dSChristoph Hellwig if (enable_quota) 45070f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4508d4c402d9SCurt Wohlgemuth 4509d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4510d4c402d9SCurt Wohlgemuth kfree(orig_data); 4511ac27a0ecSDave Kleikamp return 0; 45120b8e58a1SAndreas Dilger 4513ac27a0ecSDave Kleikamp restore_opts: 4514ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4515ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4516a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4517ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4518ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4519ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 452030773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 452130773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4522ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4523ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4524ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4525ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4526ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4527ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4528ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4529ac27a0ecSDave Kleikamp } 4530ac27a0ecSDave Kleikamp #endif 4531bbd6851aSAl Viro unlock_super(sb); 4532d4c402d9SCurt Wohlgemuth kfree(orig_data); 4533ac27a0ecSDave Kleikamp return err; 4534ac27a0ecSDave Kleikamp } 4535ac27a0ecSDave Kleikamp 4536f975d6bcSTheodore Ts'o /* 4537f975d6bcSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4538f975d6bcSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4539f975d6bcSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4540f975d6bcSTheodore Ts'o * different block group can end up in the same allocation cluster. 4541f975d6bcSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4542f975d6bcSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4543f975d6bcSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4544f975d6bcSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4545f975d6bcSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4546f975d6bcSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4547f975d6bcSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4548f975d6bcSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4549f975d6bcSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4550f975d6bcSTheodore Ts'o */ 4551617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4552ac27a0ecSDave Kleikamp { 4553ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4554617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4555617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4556f975d6bcSTheodore Ts'o struct ext4_group_desc *gdp; 4557960cc398SPekka Enberg u64 fsid; 4558d02a9391SKazuya Mio s64 bfree; 4559ac27a0ecSDave Kleikamp 45605e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 45615e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 4562f975d6bcSTheodore Ts'o } else if (es->s_overhead_clusters) { 4563f975d6bcSTheodore Ts'o sbi->s_overhead_last = le32_to_cpu(es->s_overhead_clusters); 45646bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 45658df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 45665e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 4567ac27a0ecSDave Kleikamp 4568ac27a0ecSDave Kleikamp /* 45695e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 45705e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 45715e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 4572ac27a0ecSDave Kleikamp */ 4573ac27a0ecSDave Kleikamp 4574ac27a0ecSDave Kleikamp /* 4575ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 4576ac27a0ecSDave Kleikamp * overhead 4577ac27a0ecSDave Kleikamp */ 4578f975d6bcSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4579ac27a0ecSDave Kleikamp 4580ac27a0ecSDave Kleikamp /* 4581f975d6bcSTheodore Ts'o * Add the overhead found in each block group 4582ac27a0ecSDave Kleikamp */ 4583ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 4584f975d6bcSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4585f975d6bcSTheodore Ts'o overhead += ext4_num_overhead_clusters(sb, i, gdp); 4586ac27a0ecSDave Kleikamp cond_resched(); 4587ac27a0ecSDave Kleikamp } 45885e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 45895e70030dSBadari Pulavarty smp_wmb(); 45906bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 4591ac27a0ecSDave Kleikamp } 4592ac27a0ecSDave Kleikamp 4593617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4594ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4595f975d6bcSTheodore Ts'o buf->f_blocks = (ext4_blocks_count(es) - 4596f975d6bcSTheodore Ts'o EXT4_C2B(sbi, sbi->s_overhead_last)); 459757042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 459857042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4599d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 460057042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 4601bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4602bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4603ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4604ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 460552d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4606617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4607960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4608960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4609960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4610960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 46110b8e58a1SAndreas Dilger 4612ac27a0ecSDave Kleikamp return 0; 4613ac27a0ecSDave Kleikamp } 4614ac27a0ecSDave Kleikamp 46150b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 46160b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4617ac27a0ecSDave Kleikamp * Process 1 Process 2 4618617ba13bSMingming Cao * ext4_create() quota_sync() 4619dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4620871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4621dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4622ac27a0ecSDave Kleikamp * 4623ac27a0ecSDave Kleikamp */ 4624ac27a0ecSDave Kleikamp 4625ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4626ac27a0ecSDave Kleikamp 4627ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4628ac27a0ecSDave Kleikamp { 4629ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4630ac27a0ecSDave Kleikamp } 4631ac27a0ecSDave Kleikamp 4632617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4633ac27a0ecSDave Kleikamp { 4634ac27a0ecSDave Kleikamp int ret, err; 4635ac27a0ecSDave Kleikamp handle_t *handle; 4636ac27a0ecSDave Kleikamp struct inode *inode; 4637ac27a0ecSDave Kleikamp 4638ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4639617ba13bSMingming Cao handle = ext4_journal_start(inode, 4640617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4641ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4642ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4643ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4644617ba13bSMingming Cao err = ext4_journal_stop(handle); 4645ac27a0ecSDave Kleikamp if (!ret) 4646ac27a0ecSDave Kleikamp ret = err; 4647ac27a0ecSDave Kleikamp return ret; 4648ac27a0ecSDave Kleikamp } 4649ac27a0ecSDave Kleikamp 4650617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4651ac27a0ecSDave Kleikamp { 4652ac27a0ecSDave Kleikamp int ret, err; 4653ac27a0ecSDave Kleikamp handle_t *handle; 4654ac27a0ecSDave Kleikamp 4655617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4656617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4657ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4658ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4659ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4660617ba13bSMingming Cao err = ext4_journal_stop(handle); 4661ac27a0ecSDave Kleikamp if (!ret) 4662ac27a0ecSDave Kleikamp ret = err; 4663ac27a0ecSDave Kleikamp return ret; 4664ac27a0ecSDave Kleikamp } 4665ac27a0ecSDave Kleikamp 4666617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4667ac27a0ecSDave Kleikamp { 4668ac27a0ecSDave Kleikamp int ret, err; 4669ac27a0ecSDave Kleikamp handle_t *handle; 4670ac27a0ecSDave Kleikamp 4671617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4672617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 46739c3013e9SJan Kara if (IS_ERR(handle)) { 46749c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 46759c3013e9SJan Kara dquot_release(dquot); 4676ac27a0ecSDave Kleikamp return PTR_ERR(handle); 46779c3013e9SJan Kara } 4678ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4679617ba13bSMingming Cao err = ext4_journal_stop(handle); 4680ac27a0ecSDave Kleikamp if (!ret) 4681ac27a0ecSDave Kleikamp ret = err; 4682ac27a0ecSDave Kleikamp return ret; 4683ac27a0ecSDave Kleikamp } 4684ac27a0ecSDave Kleikamp 4685617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4686ac27a0ecSDave Kleikamp { 46872c8be6b2SJan Kara /* Are we journaling quotas? */ 4688617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4689617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4690ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4691617ba13bSMingming Cao return ext4_write_dquot(dquot); 4692ac27a0ecSDave Kleikamp } else { 4693ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4694ac27a0ecSDave Kleikamp } 4695ac27a0ecSDave Kleikamp } 4696ac27a0ecSDave Kleikamp 4697617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4698ac27a0ecSDave Kleikamp { 4699ac27a0ecSDave Kleikamp int ret, err; 4700ac27a0ecSDave Kleikamp handle_t *handle; 4701ac27a0ecSDave Kleikamp 4702ac27a0ecSDave Kleikamp /* Data block + inode block */ 4703617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4704ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4705ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4706ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4707617ba13bSMingming Cao err = ext4_journal_stop(handle); 4708ac27a0ecSDave Kleikamp if (!ret) 4709ac27a0ecSDave Kleikamp ret = err; 4710ac27a0ecSDave Kleikamp return ret; 4711ac27a0ecSDave Kleikamp } 4712ac27a0ecSDave Kleikamp 4713ac27a0ecSDave Kleikamp /* 4714ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4715ac27a0ecSDave Kleikamp * the quota file and such... 4716ac27a0ecSDave Kleikamp */ 4717617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4718ac27a0ecSDave Kleikamp { 4719287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4720617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4721ac27a0ecSDave Kleikamp } 4722ac27a0ecSDave Kleikamp 4723ac27a0ecSDave Kleikamp /* 4724ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4725ac27a0ecSDave Kleikamp */ 4726617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4727f00c9e44SJan Kara struct path *path) 4728ac27a0ecSDave Kleikamp { 4729ac27a0ecSDave Kleikamp int err; 4730ac27a0ecSDave Kleikamp 4731ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4732ac27a0ecSDave Kleikamp return -EINVAL; 47330623543bSJan Kara 4734ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4735d8c9584eSAl Viro if (path->dentry->d_sb != sb) 4736ac27a0ecSDave Kleikamp return -EXDEV; 47370623543bSJan Kara /* Journaling quota? */ 47380623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 47392b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4740f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4741b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4742b31e1552SEric Sandeen "Quota file not on filesystem root. " 4743b31e1552SEric Sandeen "Journaled quota will not work"); 47440623543bSJan Kara } 47450623543bSJan Kara 47460623543bSJan Kara /* 47470623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 47480623543bSJan Kara * all updates to the file when we bypass pagecache... 47490623543bSJan Kara */ 47500390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4751f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 47520623543bSJan Kara /* 47530623543bSJan Kara * We don't need to lock updates but journal_flush() could 47540623543bSJan Kara * otherwise be livelocked... 47550623543bSJan Kara */ 47560623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 47577ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 47580623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4759f00c9e44SJan Kara if (err) 47607ffe1ea8SHidehiro Kawai return err; 47617ffe1ea8SHidehiro Kawai } 47620623543bSJan Kara 4763f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4764ac27a0ecSDave Kleikamp } 4765ac27a0ecSDave Kleikamp 4766ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4767ca0e05e4SDmitry Monakhov { 476821f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 476921f97697SJan Kara handle_t *handle; 477021f97697SJan Kara 477187009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 477287009d86SDmitry Monakhov * Caller already holds s_umount sem */ 477387009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 4774ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4775ca0e05e4SDmitry Monakhov 47760b268590SAmir Goldstein if (!inode) 47770b268590SAmir Goldstein goto out; 47780b268590SAmir Goldstein 477921f97697SJan Kara /* Update modification times of quota files when userspace can 478021f97697SJan Kara * start looking at them */ 478121f97697SJan Kara handle = ext4_journal_start(inode, 1); 478221f97697SJan Kara if (IS_ERR(handle)) 478321f97697SJan Kara goto out; 478421f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 478521f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 478621f97697SJan Kara ext4_journal_stop(handle); 478721f97697SJan Kara 478821f97697SJan Kara out: 4789ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4790ca0e05e4SDmitry Monakhov } 4791ca0e05e4SDmitry Monakhov 4792ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4793ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4794ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 4795ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4796617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4797ac27a0ecSDave Kleikamp size_t len, loff_t off) 4798ac27a0ecSDave Kleikamp { 4799ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4800725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4801ac27a0ecSDave Kleikamp int err = 0; 4802ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4803ac27a0ecSDave Kleikamp int tocopy; 4804ac27a0ecSDave Kleikamp size_t toread; 4805ac27a0ecSDave Kleikamp struct buffer_head *bh; 4806ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4807ac27a0ecSDave Kleikamp 4808ac27a0ecSDave Kleikamp if (off > i_size) 4809ac27a0ecSDave Kleikamp return 0; 4810ac27a0ecSDave Kleikamp if (off+len > i_size) 4811ac27a0ecSDave Kleikamp len = i_size-off; 4812ac27a0ecSDave Kleikamp toread = len; 4813ac27a0ecSDave Kleikamp while (toread > 0) { 4814ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4815ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4816617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4817ac27a0ecSDave Kleikamp if (err) 4818ac27a0ecSDave Kleikamp return err; 4819ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4820ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4821ac27a0ecSDave Kleikamp else 4822ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4823ac27a0ecSDave Kleikamp brelse(bh); 4824ac27a0ecSDave Kleikamp offset = 0; 4825ac27a0ecSDave Kleikamp toread -= tocopy; 4826ac27a0ecSDave Kleikamp data += tocopy; 4827ac27a0ecSDave Kleikamp blk++; 4828ac27a0ecSDave Kleikamp } 4829ac27a0ecSDave Kleikamp return len; 4830ac27a0ecSDave Kleikamp } 4831ac27a0ecSDave Kleikamp 4832ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4833ac27a0ecSDave Kleikamp * enough credits) */ 4834617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4835ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4836ac27a0ecSDave Kleikamp { 4837ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4838725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4839ac27a0ecSDave Kleikamp int err = 0; 4840ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4841ac27a0ecSDave Kleikamp struct buffer_head *bh; 4842ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4843ac27a0ecSDave Kleikamp 48440390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4845b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4846b31e1552SEric Sandeen " cancelled because transaction is not started", 48479c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 48489c3013e9SJan Kara return -EIO; 48499c3013e9SJan Kara } 485067eeb568SDmitry Monakhov /* 485167eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 485267eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 485367eeb568SDmitry Monakhov */ 485467eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 485567eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 485667eeb568SDmitry Monakhov " cancelled because not block aligned", 485767eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 485867eeb568SDmitry Monakhov return -EIO; 485967eeb568SDmitry Monakhov } 486067eeb568SDmitry Monakhov 4861ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4862617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4863ac27a0ecSDave Kleikamp if (!bh) 4864ac27a0ecSDave Kleikamp goto out; 4865617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4866ac27a0ecSDave Kleikamp if (err) { 4867ac27a0ecSDave Kleikamp brelse(bh); 4868ac27a0ecSDave Kleikamp goto out; 4869ac27a0ecSDave Kleikamp } 4870ac27a0ecSDave Kleikamp lock_buffer(bh); 487167eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4872ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4873ac27a0ecSDave Kleikamp unlock_buffer(bh); 48740390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4875ac27a0ecSDave Kleikamp brelse(bh); 4876ac27a0ecSDave Kleikamp out: 487767eeb568SDmitry Monakhov if (err) { 48784d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4879ac27a0ecSDave Kleikamp return err; 48804d04e4fbSJan Kara } 488167eeb568SDmitry Monakhov if (inode->i_size < off + len) { 488267eeb568SDmitry Monakhov i_size_write(inode, off + len); 4883617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4884617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 488521f97697SJan Kara } 4886ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 488767eeb568SDmitry Monakhov return len; 4888ac27a0ecSDave Kleikamp } 4889ac27a0ecSDave Kleikamp 4890ac27a0ecSDave Kleikamp #endif 4891ac27a0ecSDave Kleikamp 4892152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 4893152a0836SAl Viro const char *dev_name, void *data) 4894ac27a0ecSDave Kleikamp { 4895152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 4896ac27a0ecSDave Kleikamp } 4897ac27a0ecSDave Kleikamp 489837f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 489924b58424STheodore Ts'o static inline void register_as_ext2(void) 490024b58424STheodore Ts'o { 490124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 490224b58424STheodore Ts'o if (err) 490324b58424STheodore Ts'o printk(KERN_WARNING 490424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 490524b58424STheodore Ts'o } 490624b58424STheodore Ts'o 490724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 490824b58424STheodore Ts'o { 490924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 491024b58424STheodore Ts'o } 49112035e776STheodore Ts'o 49122035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 49132035e776STheodore Ts'o { 49142035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 49152035e776STheodore Ts'o return 0; 49162035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 49172035e776STheodore Ts'o return 1; 49182035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 49192035e776STheodore Ts'o return 0; 49202035e776STheodore Ts'o return 1; 49212035e776STheodore Ts'o } 492251b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 492324b58424STheodore Ts'o #else 492424b58424STheodore Ts'o static inline void register_as_ext2(void) { } 492524b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 49262035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 492724b58424STheodore Ts'o #endif 492824b58424STheodore Ts'o 492937f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 493024b58424STheodore Ts'o static inline void register_as_ext3(void) 493124b58424STheodore Ts'o { 493224b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 493324b58424STheodore Ts'o if (err) 493424b58424STheodore Ts'o printk(KERN_WARNING 493524b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 493624b58424STheodore Ts'o } 493724b58424STheodore Ts'o 493824b58424STheodore Ts'o static inline void unregister_as_ext3(void) 493924b58424STheodore Ts'o { 494024b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 494124b58424STheodore Ts'o } 49422035e776STheodore Ts'o 49432035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 49442035e776STheodore Ts'o { 49452035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 49462035e776STheodore Ts'o return 0; 49472035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 49482035e776STheodore Ts'o return 0; 49492035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 49502035e776STheodore Ts'o return 1; 49512035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 49522035e776STheodore Ts'o return 0; 49532035e776STheodore Ts'o return 1; 49542035e776STheodore Ts'o } 495551b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 495624b58424STheodore Ts'o #else 495724b58424STheodore Ts'o static inline void register_as_ext3(void) { } 495824b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 49592035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 496024b58424STheodore Ts'o #endif 496124b58424STheodore Ts'o 496203010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4963ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 496403010a33STheodore Ts'o .name = "ext4", 4965152a0836SAl Viro .mount = ext4_mount, 4966ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4967ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4968ac27a0ecSDave Kleikamp }; 4969ac27a0ecSDave Kleikamp 49708f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 4971857ac889SLukas Czerner { 4972857ac889SLukas Czerner struct ext4_features *ef; 4973857ac889SLukas Czerner int ret = -ENOMEM; 4974857ac889SLukas Czerner 4975857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 4976857ac889SLukas Czerner if (!ef) 4977857ac889SLukas Czerner goto out; 4978857ac889SLukas Czerner 4979857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 4980857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 4981857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 4982857ac889SLukas Czerner "features"); 4983857ac889SLukas Czerner if (ret) { 4984857ac889SLukas Czerner kfree(ef); 4985857ac889SLukas Czerner goto out; 4986857ac889SLukas Czerner } 4987857ac889SLukas Czerner 4988857ac889SLukas Czerner ext4_feat = ef; 4989857ac889SLukas Czerner ret = 0; 4990857ac889SLukas Czerner out: 4991857ac889SLukas Czerner return ret; 4992857ac889SLukas Czerner } 4993857ac889SLukas Czerner 49948f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 49958f021222SLukas Czerner { 49968f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 49978f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 49988f021222SLukas Czerner kfree(ext4_feat); 49998f021222SLukas Czerner } 50008f021222SLukas Czerner 5001e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5002e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5003e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5004e9e3bcecSEric Sandeen 50055dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5006ac27a0ecSDave Kleikamp { 5007e9e3bcecSEric Sandeen int i, err; 5008c9de560dSAlex Tomas 500907c0c5d8SAl Viro ext4_li_info = NULL; 501007c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 501107c0c5d8SAl Viro 501212e9b892SDmitry Monakhov ext4_check_flag_values(); 5013e9e3bcecSEric Sandeen 5014e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5015e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5016e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5017e9e3bcecSEric Sandeen } 5018e9e3bcecSEric Sandeen 50195dabfc78STheodore Ts'o err = ext4_init_pageio(); 50206fd058f7STheodore Ts'o if (err) 50216fd058f7STheodore Ts'o return err; 50225dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5023bd2d0210STheodore Ts'o if (err) 5024d44651d0SFabrice Jouhaud goto out6; 50253197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 50263197ebdbSTheodore Ts'o if (!ext4_kset) 5027dd68314cSTheodore Ts'o goto out5; 5028d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5029857ac889SLukas Czerner 5030857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5031dd68314cSTheodore Ts'o if (err) 5032dd68314cSTheodore Ts'o goto out4; 5033857ac889SLukas Czerner 50345dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5035ac27a0ecSDave Kleikamp if (err) 50366fd058f7STheodore Ts'o goto out3; 5037c9de560dSAlex Tomas 50385dabfc78STheodore Ts'o err = ext4_init_xattr(); 5039c9de560dSAlex Tomas if (err) 5040c9de560dSAlex Tomas goto out2; 5041ac27a0ecSDave Kleikamp err = init_inodecache(); 5042ac27a0ecSDave Kleikamp if (err) 5043ac27a0ecSDave Kleikamp goto out1; 504424b58424STheodore Ts'o register_as_ext3(); 50452035e776STheodore Ts'o register_as_ext2(); 504603010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5047ac27a0ecSDave Kleikamp if (err) 5048ac27a0ecSDave Kleikamp goto out; 5049bfff6873SLukas Czerner 5050ac27a0ecSDave Kleikamp return 0; 5051ac27a0ecSDave Kleikamp out: 505224b58424STheodore Ts'o unregister_as_ext2(); 505324b58424STheodore Ts'o unregister_as_ext3(); 5054ac27a0ecSDave Kleikamp destroy_inodecache(); 5055ac27a0ecSDave Kleikamp out1: 50565dabfc78STheodore Ts'o ext4_exit_xattr(); 5057c9de560dSAlex Tomas out2: 50585dabfc78STheodore Ts'o ext4_exit_mballoc(); 50596fd058f7STheodore Ts'o out3: 50608f021222SLukas Czerner ext4_exit_feat_adverts(); 50616fd058f7STheodore Ts'o out4: 5062d44651d0SFabrice Jouhaud if (ext4_proc_root) 5063dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5064dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5065d44651d0SFabrice Jouhaud out5: 5066dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5067d44651d0SFabrice Jouhaud out6: 50685dabfc78STheodore Ts'o ext4_exit_pageio(); 5069ac27a0ecSDave Kleikamp return err; 5070ac27a0ecSDave Kleikamp } 5071ac27a0ecSDave Kleikamp 50725dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5073ac27a0ecSDave Kleikamp { 5074bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 507524b58424STheodore Ts'o unregister_as_ext2(); 507624b58424STheodore Ts'o unregister_as_ext3(); 507703010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5078ac27a0ecSDave Kleikamp destroy_inodecache(); 50795dabfc78STheodore Ts'o ext4_exit_xattr(); 50805dabfc78STheodore Ts'o ext4_exit_mballoc(); 50818f021222SLukas Czerner ext4_exit_feat_adverts(); 50829f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 50833197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 50845dabfc78STheodore Ts'o ext4_exit_system_zone(); 50855dabfc78STheodore Ts'o ext4_exit_pageio(); 5086ac27a0ecSDave Kleikamp } 5087ac27a0ecSDave Kleikamp 5088ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 508983982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5090ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 50915dabfc78STheodore Ts'o module_init(ext4_init_fs) 50925dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5093