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); 77c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 78152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 79152a0836SAl Viro const char *dev_name, void *data); 802035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 812035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 82d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 83bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 84bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 858f1f7453SEric Sandeen static void ext4_clear_request_list(void); 86ac27a0ecSDave Kleikamp 872035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 882035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 892035e776STheodore Ts'o .owner = THIS_MODULE, 902035e776STheodore Ts'o .name = "ext2", 912035e776STheodore Ts'o .mount = ext4_mount, 922035e776STheodore Ts'o .kill_sb = kill_block_super, 932035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 942035e776STheodore Ts'o }; 952035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 962035e776STheodore Ts'o #else 972035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 982035e776STheodore Ts'o #endif 992035e776STheodore Ts'o 1002035e776STheodore Ts'o 101ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 102ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 103ba69f9abSJan Kara .owner = THIS_MODULE, 104ba69f9abSJan Kara .name = "ext3", 105152a0836SAl Viro .mount = ext4_mount, 106ba69f9abSJan Kara .kill_sb = kill_block_super, 107ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 108ba69f9abSJan Kara }; 109ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 110ba69f9abSJan Kara #else 111ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 112ba69f9abSJan Kara #endif 113bd81d8eeSLaurent Vivier 114d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 115d25425f8SDarrick J. Wong struct ext4_super_block *es) 116d25425f8SDarrick J. Wong { 117d25425f8SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 118d25425f8SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 119d25425f8SDarrick J. Wong return 1; 120d25425f8SDarrick J. Wong 121d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 122d25425f8SDarrick J. Wong } 123d25425f8SDarrick J. Wong 124a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 125a9c47317SDarrick J. Wong struct ext4_super_block *es) 126a9c47317SDarrick J. Wong { 127a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 128a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 129a9c47317SDarrick J. Wong __u32 csum; 130a9c47317SDarrick J. Wong 131a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 132a9c47317SDarrick J. Wong 133a9c47317SDarrick J. Wong return cpu_to_le32(csum); 134a9c47317SDarrick J. Wong } 135a9c47317SDarrick J. Wong 136a9c47317SDarrick J. Wong int ext4_superblock_csum_verify(struct super_block *sb, 137a9c47317SDarrick J. Wong struct ext4_super_block *es) 138a9c47317SDarrick J. Wong { 139a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 140a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 141a9c47317SDarrick J. Wong return 1; 142a9c47317SDarrick J. Wong 143a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 144a9c47317SDarrick J. Wong } 145a9c47317SDarrick J. Wong 146a9c47317SDarrick J. Wong void ext4_superblock_csum_set(struct super_block *sb, 147a9c47317SDarrick J. Wong struct ext4_super_block *es) 148a9c47317SDarrick J. Wong { 149a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 150a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 151a9c47317SDarrick J. Wong return; 152a9c47317SDarrick J. Wong 153a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 154a9c47317SDarrick J. Wong } 155a9c47317SDarrick J. Wong 1569933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1579933fc0aSTheodore Ts'o { 1589933fc0aSTheodore Ts'o void *ret; 1599933fc0aSTheodore Ts'o 1609933fc0aSTheodore Ts'o ret = kmalloc(size, flags); 1619933fc0aSTheodore Ts'o if (!ret) 1629933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1639933fc0aSTheodore Ts'o return ret; 1649933fc0aSTheodore Ts'o } 1659933fc0aSTheodore Ts'o 1669933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1679933fc0aSTheodore Ts'o { 1689933fc0aSTheodore Ts'o void *ret; 1699933fc0aSTheodore Ts'o 170db9481c0SMathias Krause ret = kzalloc(size, flags); 1719933fc0aSTheodore Ts'o if (!ret) 1729933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1739933fc0aSTheodore Ts'o return ret; 1749933fc0aSTheodore Ts'o } 1759933fc0aSTheodore Ts'o 1769933fc0aSTheodore Ts'o void ext4_kvfree(void *ptr) 1779933fc0aSTheodore Ts'o { 1789933fc0aSTheodore Ts'o if (is_vmalloc_addr(ptr)) 1799933fc0aSTheodore Ts'o vfree(ptr); 1809933fc0aSTheodore Ts'o else 1819933fc0aSTheodore Ts'o kfree(ptr); 1829933fc0aSTheodore Ts'o 1839933fc0aSTheodore Ts'o } 1849933fc0aSTheodore Ts'o 1858fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1868fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 187bd81d8eeSLaurent Vivier { 1883a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1898fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1908fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 191bd81d8eeSLaurent Vivier } 192bd81d8eeSLaurent Vivier 1938fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1948fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 195bd81d8eeSLaurent Vivier { 1965272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1978fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1988fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 199bd81d8eeSLaurent Vivier } 200bd81d8eeSLaurent Vivier 2018fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2028fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 203bd81d8eeSLaurent Vivier { 2045272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2058fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2068fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 207bd81d8eeSLaurent Vivier } 208bd81d8eeSLaurent Vivier 209021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 210560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 211560671a0SAneesh Kumar K.V { 212560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 213560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 214560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 215560671a0SAneesh Kumar K.V } 216560671a0SAneesh Kumar K.V 217560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 218560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 219560671a0SAneesh Kumar K.V { 220560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 221560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 222560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 223560671a0SAneesh Kumar K.V } 224560671a0SAneesh Kumar K.V 225560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 226560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 227560671a0SAneesh Kumar K.V { 228560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 229560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 230560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 231560671a0SAneesh Kumar K.V } 232560671a0SAneesh Kumar K.V 233560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 234560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 235560671a0SAneesh Kumar K.V { 236560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 237560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 238560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 239560671a0SAneesh Kumar K.V } 240560671a0SAneesh Kumar K.V 2418fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2428fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 243bd81d8eeSLaurent Vivier { 2443a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2458fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2468fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 247bd81d8eeSLaurent Vivier } 248bd81d8eeSLaurent Vivier 2498fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2508fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 251bd81d8eeSLaurent Vivier { 2525272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2538fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2548fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 255bd81d8eeSLaurent Vivier } 256bd81d8eeSLaurent Vivier 2578fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2588fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 259bd81d8eeSLaurent Vivier { 2605272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2618fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2628fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 263bd81d8eeSLaurent Vivier } 264bd81d8eeSLaurent Vivier 265021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 266560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 267560671a0SAneesh Kumar K.V { 268560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 269560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 270560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 271560671a0SAneesh Kumar K.V } 272560671a0SAneesh Kumar K.V 273560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 274560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 275560671a0SAneesh Kumar K.V { 276560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 277560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 278560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 279560671a0SAneesh Kumar K.V } 280560671a0SAneesh Kumar K.V 281560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 282560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 283560671a0SAneesh Kumar K.V { 284560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 285560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 286560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 287560671a0SAneesh Kumar K.V } 288560671a0SAneesh Kumar K.V 289560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 290560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 291560671a0SAneesh Kumar K.V { 292560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 293560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 294560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 295560671a0SAneesh Kumar K.V } 296560671a0SAneesh Kumar K.V 297d3d1faf6SCurt Wohlgemuth 298d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 299d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 300d3d1faf6SCurt Wohlgemuth { 301d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 302d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 303d3d1faf6SCurt Wohlgemuth 304d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 305d3d1faf6SCurt Wohlgemuth 306d3d1faf6SCurt Wohlgemuth ref_cnt++; 307d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 308d3d1faf6SCurt Wohlgemuth 309d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 310d3d1faf6SCurt Wohlgemuth return handle; 311d3d1faf6SCurt Wohlgemuth } 312d3d1faf6SCurt Wohlgemuth 313d3d1faf6SCurt Wohlgemuth 314d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 315d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 316d3d1faf6SCurt Wohlgemuth { 317d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 318d3d1faf6SCurt Wohlgemuth 319d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 320d3d1faf6SCurt Wohlgemuth 321d3d1faf6SCurt Wohlgemuth ref_cnt--; 322d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 323d3d1faf6SCurt Wohlgemuth 324d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 325d3d1faf6SCurt Wohlgemuth } 326d3d1faf6SCurt Wohlgemuth 327ac27a0ecSDave Kleikamp /* 328dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 329ac27a0ecSDave Kleikamp * 330ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 331ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 332ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 333ac27a0ecSDave Kleikamp * appropriate. 334ac27a0ecSDave Kleikamp */ 335617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 336ac27a0ecSDave Kleikamp { 337ac27a0ecSDave Kleikamp journal_t *journal; 338ac27a0ecSDave Kleikamp 33912706394STheodore Ts'o trace_ext4_journal_start(sb, nblocks, _RET_IP_); 340ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 341ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 342ac27a0ecSDave Kleikamp 3438e8ad8a5SJan Kara WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE); 344617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 345be4f27d3SYongqiang Yang if (!journal) 346be4f27d3SYongqiang Yang return ext4_get_nojournal(); 347be4f27d3SYongqiang Yang /* 348be4f27d3SYongqiang Yang * Special case here: if the journal has aborted behind our 349be4f27d3SYongqiang Yang * backs (eg. EIO in the commit thread), then we still need to 350be4f27d3SYongqiang Yang * take the FS itself readonly cleanly. 351be4f27d3SYongqiang Yang */ 352ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 353c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 354ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 355ac27a0ecSDave Kleikamp } 356dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 357ac27a0ecSDave Kleikamp } 358ac27a0ecSDave Kleikamp 359ac27a0ecSDave Kleikamp /* 360ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 361dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 362ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 363ac27a0ecSDave Kleikamp * appropriate. 364ac27a0ecSDave Kleikamp */ 365c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 366ac27a0ecSDave Kleikamp { 367ac27a0ecSDave Kleikamp struct super_block *sb; 368ac27a0ecSDave Kleikamp int err; 369ac27a0ecSDave Kleikamp int rc; 370ac27a0ecSDave Kleikamp 3710390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 372d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 3730390131bSFrank Mayhar return 0; 3740390131bSFrank Mayhar } 375ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 376ac27a0ecSDave Kleikamp err = handle->h_err; 377dab291afSMingming Cao rc = jbd2_journal_stop(handle); 378ac27a0ecSDave Kleikamp 379ac27a0ecSDave Kleikamp if (!err) 380ac27a0ecSDave Kleikamp err = rc; 381ac27a0ecSDave Kleikamp if (err) 382c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 383ac27a0ecSDave Kleikamp return err; 384ac27a0ecSDave Kleikamp } 385ac27a0ecSDave Kleikamp 38690c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 38790c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 38890c7201bSTheodore Ts'o handle_t *handle, int err) 389ac27a0ecSDave Kleikamp { 390ac27a0ecSDave Kleikamp char nbuf[16]; 391617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 392ac27a0ecSDave Kleikamp 3930390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 3940390131bSFrank Mayhar 395ac27a0ecSDave Kleikamp if (bh) 396ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 397ac27a0ecSDave Kleikamp 398ac27a0ecSDave Kleikamp if (!handle->h_err) 399ac27a0ecSDave Kleikamp handle->h_err = err; 400ac27a0ecSDave Kleikamp 401ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 402ac27a0ecSDave Kleikamp return; 403ac27a0ecSDave Kleikamp 40492b97816STheodore Ts'o printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n", 40590c7201bSTheodore Ts'o caller, line, errstr, err_fn); 406ac27a0ecSDave Kleikamp 407dab291afSMingming Cao jbd2_journal_abort_handle(handle); 408ac27a0ecSDave Kleikamp } 409ac27a0ecSDave Kleikamp 4101c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 4111c13d5c0STheodore Ts'o unsigned int line) 4121c13d5c0STheodore Ts'o { 4131c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4141c13d5c0STheodore Ts'o 4151c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4161c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4171c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 4181c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 4191c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 4201c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 4211c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 4221c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 4231c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 4241c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 4251c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 4261c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 4271c13d5c0STheodore Ts'o } 42866e61a9eSTheodore Ts'o /* 42966e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 43066e61a9eSTheodore Ts'o * started already 43166e61a9eSTheodore Ts'o */ 43266e61a9eSTheodore Ts'o if (!es->s_error_count) 43366e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 4341c13d5c0STheodore Ts'o es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); 4351c13d5c0STheodore Ts'o } 4361c13d5c0STheodore Ts'o 4371c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 4381c13d5c0STheodore Ts'o unsigned int line) 4391c13d5c0STheodore Ts'o { 4401c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 4411c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 4421c13d5c0STheodore Ts'o } 4431c13d5c0STheodore Ts'o 4447c2e7087STheodore Ts'o /* 4457c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 4467c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 4477c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 4487c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 4497c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 4507c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 4517c2e7087STheodore Ts'o */ 4527c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 4537c2e7087STheodore Ts'o { 4547c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 4557c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 4567c2e7087STheodore Ts'o 4577c2e7087STheodore Ts'o return bdi->dev == NULL; 4587c2e7087STheodore Ts'o } 4597c2e7087STheodore Ts'o 46018aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 46118aadd47SBobi Jam { 46218aadd47SBobi Jam struct super_block *sb = journal->j_private; 46318aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 46418aadd47SBobi Jam int error = is_journal_aborted(journal); 46518aadd47SBobi Jam struct ext4_journal_cb_entry *jce, *tmp; 46618aadd47SBobi Jam 46718aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 46818aadd47SBobi Jam list_for_each_entry_safe(jce, tmp, &txn->t_private_list, jce_list) { 46918aadd47SBobi Jam list_del_init(&jce->jce_list); 47018aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 47118aadd47SBobi Jam jce->jce_func(sb, jce, error); 47218aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 47318aadd47SBobi Jam } 47418aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 47518aadd47SBobi Jam } 4761c13d5c0STheodore Ts'o 477ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 478ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 479ac27a0ecSDave Kleikamp * 480ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 481617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 482ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 483ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 484ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 485ac27a0ecSDave Kleikamp * write out the superblock safely. 486ac27a0ecSDave Kleikamp * 487dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 488d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 489ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 490ac27a0ecSDave Kleikamp */ 491ac27a0ecSDave Kleikamp 492617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 493ac27a0ecSDave Kleikamp { 494ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 495ac27a0ecSDave Kleikamp return; 496ac27a0ecSDave Kleikamp 497ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 498617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 499ac27a0ecSDave Kleikamp 5004ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 501ac27a0ecSDave Kleikamp if (journal) 502dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 503ac27a0ecSDave Kleikamp } 504ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 505b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 506ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 507ac27a0ecSDave Kleikamp } 508ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 509617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 510ac27a0ecSDave Kleikamp sb->s_id); 511ac27a0ecSDave Kleikamp } 512ac27a0ecSDave Kleikamp 51312062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 514c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 515ac27a0ecSDave Kleikamp { 5160ff2ea7dSJoe Perches struct va_format vaf; 517ac27a0ecSDave Kleikamp va_list args; 518ac27a0ecSDave Kleikamp 519ac27a0ecSDave Kleikamp va_start(args, fmt); 5200ff2ea7dSJoe Perches vaf.fmt = fmt; 5210ff2ea7dSJoe Perches vaf.va = &args; 5220ff2ea7dSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 5230ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 524ac27a0ecSDave Kleikamp va_end(args); 525f3fc0210STheodore Ts'o save_error_info(sb, function, line); 526ac27a0ecSDave Kleikamp 527617ba13bSMingming Cao ext4_handle_error(sb); 528ac27a0ecSDave Kleikamp } 529ac27a0ecSDave Kleikamp 530c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 531c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 532273df556SFrank Mayhar const char *fmt, ...) 533273df556SFrank Mayhar { 534273df556SFrank Mayhar va_list args; 535f7c21177STheodore Ts'o struct va_format vaf; 5361c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 537273df556SFrank Mayhar 5381c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5391c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 5401c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 541273df556SFrank Mayhar va_start(args, fmt); 542f7c21177STheodore Ts'o vaf.fmt = fmt; 543f7c21177STheodore Ts'o vaf.va = &args; 544c398eda0STheodore Ts'o if (block) 545d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 546d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 547d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 548d9ee81daSJoe Perches block, current->comm, &vaf); 549d9ee81daSJoe Perches else 550d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 551d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 552d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 553d9ee81daSJoe Perches current->comm, &vaf); 554273df556SFrank Mayhar va_end(args); 555273df556SFrank Mayhar 556273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 557273df556SFrank Mayhar } 558273df556SFrank Mayhar 559c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 560f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 561f7c21177STheodore Ts'o const char *fmt, ...) 562273df556SFrank Mayhar { 563273df556SFrank Mayhar va_list args; 564f7c21177STheodore Ts'o struct va_format vaf; 5651c13d5c0STheodore Ts'o struct ext4_super_block *es; 566273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 567273df556SFrank Mayhar char pathname[80], *path; 568273df556SFrank Mayhar 5691c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5701c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5711c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 572273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 573f9a62d09SDan Carpenter if (IS_ERR(path)) 574273df556SFrank Mayhar path = "(unknown)"; 575f7c21177STheodore Ts'o va_start(args, fmt); 576f7c21177STheodore Ts'o vaf.fmt = fmt; 577f7c21177STheodore Ts'o vaf.va = &args; 578d9ee81daSJoe Perches if (block) 579d9ee81daSJoe Perches printk(KERN_CRIT 580d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 581d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 582d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 583d9ee81daSJoe Perches block, current->comm, path, &vaf); 584d9ee81daSJoe Perches else 585d9ee81daSJoe Perches printk(KERN_CRIT 586d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 587d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 588d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 589d9ee81daSJoe Perches current->comm, path, &vaf); 590273df556SFrank Mayhar va_end(args); 591273df556SFrank Mayhar 592273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 593273df556SFrank Mayhar } 594273df556SFrank Mayhar 595617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 596ac27a0ecSDave Kleikamp char nbuf[16]) 597ac27a0ecSDave Kleikamp { 598ac27a0ecSDave Kleikamp char *errstr = NULL; 599ac27a0ecSDave Kleikamp 600ac27a0ecSDave Kleikamp switch (errno) { 601ac27a0ecSDave Kleikamp case -EIO: 602ac27a0ecSDave Kleikamp errstr = "IO failure"; 603ac27a0ecSDave Kleikamp break; 604ac27a0ecSDave Kleikamp case -ENOMEM: 605ac27a0ecSDave Kleikamp errstr = "Out of memory"; 606ac27a0ecSDave Kleikamp break; 607ac27a0ecSDave Kleikamp case -EROFS: 60878f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 60978f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 610ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 611ac27a0ecSDave Kleikamp else 612ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 613ac27a0ecSDave Kleikamp break; 614ac27a0ecSDave Kleikamp default: 615ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 616ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 617ac27a0ecSDave Kleikamp * NULL. */ 618ac27a0ecSDave Kleikamp if (nbuf) { 619ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 620ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 621ac27a0ecSDave Kleikamp errstr = nbuf; 622ac27a0ecSDave Kleikamp } 623ac27a0ecSDave Kleikamp break; 624ac27a0ecSDave Kleikamp } 625ac27a0ecSDave Kleikamp 626ac27a0ecSDave Kleikamp return errstr; 627ac27a0ecSDave Kleikamp } 628ac27a0ecSDave Kleikamp 629617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 630ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 631ac27a0ecSDave Kleikamp 632c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 633c398eda0STheodore Ts'o unsigned int line, int errno) 634ac27a0ecSDave Kleikamp { 635ac27a0ecSDave Kleikamp char nbuf[16]; 636ac27a0ecSDave Kleikamp const char *errstr; 637ac27a0ecSDave Kleikamp 638ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 639ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 640ac27a0ecSDave Kleikamp * an error. */ 641ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 642ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 643ac27a0ecSDave Kleikamp return; 644ac27a0ecSDave Kleikamp 645617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 646c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 647c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 6481c13d5c0STheodore Ts'o save_error_info(sb, function, line); 649ac27a0ecSDave Kleikamp 650617ba13bSMingming Cao ext4_handle_error(sb); 651ac27a0ecSDave Kleikamp } 652ac27a0ecSDave Kleikamp 653ac27a0ecSDave Kleikamp /* 654617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 655ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 656ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 657ac27a0ecSDave Kleikamp * 658ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 659ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 660ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 661ac27a0ecSDave Kleikamp */ 662ac27a0ecSDave Kleikamp 663c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 664c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 665ac27a0ecSDave Kleikamp { 666ac27a0ecSDave Kleikamp va_list args; 667ac27a0ecSDave Kleikamp 6681c13d5c0STheodore Ts'o save_error_info(sb, function, line); 669ac27a0ecSDave Kleikamp va_start(args, fmt); 670c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 671c398eda0STheodore Ts'o function, line); 672ac27a0ecSDave Kleikamp vprintk(fmt, args); 673ac27a0ecSDave Kleikamp printk("\n"); 674ac27a0ecSDave Kleikamp va_end(args); 675ac27a0ecSDave Kleikamp 6761c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 677b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 678ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 6794ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 680ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 681dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6821c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6831c13d5c0STheodore Ts'o } 6841c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 6851c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 686ac27a0ecSDave Kleikamp } 687ac27a0ecSDave Kleikamp 6880ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 689b31e1552SEric Sandeen { 6900ff2ea7dSJoe Perches struct va_format vaf; 691b31e1552SEric Sandeen va_list args; 692b31e1552SEric Sandeen 693b31e1552SEric Sandeen va_start(args, fmt); 6940ff2ea7dSJoe Perches vaf.fmt = fmt; 6950ff2ea7dSJoe Perches vaf.va = &args; 6960ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 697b31e1552SEric Sandeen va_end(args); 698b31e1552SEric Sandeen } 699b31e1552SEric Sandeen 70012062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 701c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 702ac27a0ecSDave Kleikamp { 7030ff2ea7dSJoe Perches struct va_format vaf; 704ac27a0ecSDave Kleikamp va_list args; 705ac27a0ecSDave Kleikamp 706ac27a0ecSDave Kleikamp va_start(args, fmt); 7070ff2ea7dSJoe Perches vaf.fmt = fmt; 7080ff2ea7dSJoe Perches vaf.va = &args; 7090ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 7100ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 711ac27a0ecSDave Kleikamp va_end(args); 712ac27a0ecSDave Kleikamp } 713ac27a0ecSDave Kleikamp 714e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 715e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 716e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 717e29136f8STheodore Ts'o const char *fmt, ...) 7185d1b1b3fSAneesh Kumar K.V __releases(bitlock) 7195d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 7205d1b1b3fSAneesh Kumar K.V { 7210ff2ea7dSJoe Perches struct va_format vaf; 7225d1b1b3fSAneesh Kumar K.V va_list args; 7235d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 7245d1b1b3fSAneesh Kumar K.V 7251c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 7261c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 7271c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 7280ff2ea7dSJoe Perches 7295d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7300ff2ea7dSJoe Perches 7310ff2ea7dSJoe Perches vaf.fmt = fmt; 7320ff2ea7dSJoe Perches vaf.va = &args; 73321149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 734e29136f8STheodore Ts'o sb->s_id, function, line, grp); 735e29136f8STheodore Ts'o if (ino) 7360ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 737e29136f8STheodore Ts'o if (block) 7380ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 7390ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7405d1b1b3fSAneesh Kumar K.V va_end(args); 7415d1b1b3fSAneesh Kumar K.V 7425d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 743e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7445d1b1b3fSAneesh Kumar K.V return; 7455d1b1b3fSAneesh Kumar K.V } 7461c13d5c0STheodore Ts'o 7475d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 7485d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7495d1b1b3fSAneesh Kumar K.V /* 7505d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7515d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7525d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7535d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7545d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 75525985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7565d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7575d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7585d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7595d1b1b3fSAneesh Kumar K.V */ 7605d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7615d1b1b3fSAneesh Kumar K.V return; 7625d1b1b3fSAneesh Kumar K.V } 7635d1b1b3fSAneesh Kumar K.V 764617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 765ac27a0ecSDave Kleikamp { 766617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 767ac27a0ecSDave Kleikamp 768617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 769ac27a0ecSDave Kleikamp return; 770ac27a0ecSDave Kleikamp 77112062dddSEric Sandeen ext4_warning(sb, 772ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 773ac27a0ecSDave Kleikamp "running e2fsck is recommended", 774617ba13bSMingming Cao EXT4_DYNAMIC_REV); 775ac27a0ecSDave Kleikamp 776617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 777617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 778617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 779ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 780ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 781ac27a0ecSDave Kleikamp 782ac27a0ecSDave Kleikamp /* 783ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 784ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 785ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 786ac27a0ecSDave Kleikamp */ 787ac27a0ecSDave Kleikamp } 788ac27a0ecSDave Kleikamp 789ac27a0ecSDave Kleikamp /* 790ac27a0ecSDave Kleikamp * Open the external journal device 791ac27a0ecSDave Kleikamp */ 792b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 793ac27a0ecSDave Kleikamp { 794ac27a0ecSDave Kleikamp struct block_device *bdev; 795ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 796ac27a0ecSDave Kleikamp 797d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 798ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 799ac27a0ecSDave Kleikamp goto fail; 800ac27a0ecSDave Kleikamp return bdev; 801ac27a0ecSDave Kleikamp 802ac27a0ecSDave Kleikamp fail: 803b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 804ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 805ac27a0ecSDave Kleikamp return NULL; 806ac27a0ecSDave Kleikamp } 807ac27a0ecSDave Kleikamp 808ac27a0ecSDave Kleikamp /* 809ac27a0ecSDave Kleikamp * Release the journal device 810ac27a0ecSDave Kleikamp */ 811617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 812ac27a0ecSDave Kleikamp { 813e525fd89STejun Heo return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 814ac27a0ecSDave Kleikamp } 815ac27a0ecSDave Kleikamp 816617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 817ac27a0ecSDave Kleikamp { 818ac27a0ecSDave Kleikamp struct block_device *bdev; 819ac27a0ecSDave Kleikamp int ret = -ENODEV; 820ac27a0ecSDave Kleikamp 821ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 822ac27a0ecSDave Kleikamp if (bdev) { 823617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 824ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 825ac27a0ecSDave Kleikamp } 826ac27a0ecSDave Kleikamp return ret; 827ac27a0ecSDave Kleikamp } 828ac27a0ecSDave Kleikamp 829ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 830ac27a0ecSDave Kleikamp { 831617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 832ac27a0ecSDave Kleikamp } 833ac27a0ecSDave Kleikamp 834617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 835ac27a0ecSDave Kleikamp { 836ac27a0ecSDave Kleikamp struct list_head *l; 837ac27a0ecSDave Kleikamp 838b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 839ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 840ac27a0ecSDave Kleikamp 841ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 842ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 843ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 844ac27a0ecSDave Kleikamp printk(KERN_ERR " " 845ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 846ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 847ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 848ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 849ac27a0ecSDave Kleikamp } 850ac27a0ecSDave Kleikamp } 851ac27a0ecSDave Kleikamp 852617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 853ac27a0ecSDave Kleikamp { 854617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 855617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 856ef2cabf7SHidehiro Kawai int i, err; 857ac27a0ecSDave Kleikamp 858857ac889SLukas Czerner ext4_unregister_li_request(sb); 859e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 860e0ccfd95SChristoph Hellwig 8614c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 8624c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 8634c0425ffSMingming Cao 864a9e220f8SAl Viro lock_super(sb); 8650390131bSFrank Mayhar if (sbi->s_journal) { 866ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 86747b4a50bSJan Kara sbi->s_journal = NULL; 868ef2cabf7SHidehiro Kawai if (err < 0) 869c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8700390131bSFrank Mayhar } 871d4edac31SJosef Bacik 872a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 873d4edac31SJosef Bacik ext4_release_system_zone(sb); 874d4edac31SJosef Bacik ext4_mb_release(sb); 875d4edac31SJosef Bacik ext4_ext_release(sb); 876d4edac31SJosef Bacik ext4_xattr_put_super(sb); 877d4edac31SJosef Bacik 878ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 879617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 880ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 881ac27a0ecSDave Kleikamp } 88258c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 883a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 884a8e25a83SArtem Bityutskiy 885240799cdSTheodore Ts'o if (sbi->s_proc) { 88666acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 8879f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 888240799cdSTheodore Ts'o } 8893197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 890ac27a0ecSDave Kleikamp 891ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 892ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 893f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 8949933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 89557042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 896ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 897ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 89857042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 899ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 900ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 901ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 902ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 903ac27a0ecSDave Kleikamp #endif 904ac27a0ecSDave Kleikamp 905ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 906ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 907ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 908ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 909ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 910ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 911ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 912ac27a0ecSDave Kleikamp 913f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 914ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 915ac27a0ecSDave Kleikamp /* 916ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 917ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 918ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 919ac27a0ecSDave Kleikamp */ 920ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 921f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 922617ba13bSMingming Cao ext4_blkdev_remove(sbi); 923ac27a0ecSDave Kleikamp } 924c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 925c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 926ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 9273197ebdbSTheodore Ts'o /* 9283197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 9293197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9303197ebdbSTheodore Ts'o */ 9313197ebdbSTheodore Ts'o unlock_super(sb); 9323197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9333197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9340441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9350441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 936705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 937ac27a0ecSDave Kleikamp kfree(sbi); 938ac27a0ecSDave Kleikamp } 939ac27a0ecSDave Kleikamp 940e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 941ac27a0ecSDave Kleikamp 942ac27a0ecSDave Kleikamp /* 943ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 944ac27a0ecSDave Kleikamp */ 945617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 946ac27a0ecSDave Kleikamp { 947617ba13bSMingming Cao struct ext4_inode_info *ei; 948ac27a0ecSDave Kleikamp 949e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 950ac27a0ecSDave Kleikamp if (!ei) 951ac27a0ecSDave Kleikamp return NULL; 9520b8e58a1SAndreas Dilger 953ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 95491246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 955a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 956c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 957c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 958d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 959d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 960d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9619d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 9627e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 963d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 964a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 965a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 966a9e7f447SDmitry Monakhov #endif 9678aefcd55STheodore Ts'o ei->jinode = NULL; 968c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 969744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 9708d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 971b436b9beSJan Kara ei->i_sync_tid = 0; 972b436b9beSJan Kara ei->i_datasync_tid = 0; 973f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 974e9e3bcecSEric Sandeen atomic_set(&ei->i_aiodio_unwritten, 0); 9750b8e58a1SAndreas Dilger 976ac27a0ecSDave Kleikamp return &ei->vfs_inode; 977ac27a0ecSDave Kleikamp } 978ac27a0ecSDave Kleikamp 9797ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9807ff9c073STheodore Ts'o { 9817ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9827ff9c073STheodore Ts'o 9837ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9847ff9c073STheodore Ts'o return drop; 9857ff9c073STheodore Ts'o } 9867ff9c073STheodore Ts'o 987fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 988fa0d7e3dSNick Piggin { 989fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 990fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 991fa0d7e3dSNick Piggin } 992fa0d7e3dSNick Piggin 993617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 994ac27a0ecSDave Kleikamp { 9959f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 996b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 997b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 998b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9999f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 10009f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 10019f7dd93dSVasily Averin true); 10029f7dd93dSVasily Averin dump_stack(); 10039f7dd93dSVasily Averin } 1004fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 1005ac27a0ecSDave Kleikamp } 1006ac27a0ecSDave Kleikamp 100751cc5068SAlexey Dobriyan static void init_once(void *foo) 1008ac27a0ecSDave Kleikamp { 1009617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1010ac27a0ecSDave Kleikamp 1011ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 101203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1013ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 1014ac27a0ecSDave Kleikamp #endif 10150e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1016ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1017ac27a0ecSDave Kleikamp } 1018ac27a0ecSDave Kleikamp 1019ac27a0ecSDave Kleikamp static int init_inodecache(void) 1020ac27a0ecSDave Kleikamp { 1021617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 1022617ba13bSMingming Cao sizeof(struct ext4_inode_info), 1023ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 1024ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 102520c2df83SPaul Mundt init_once); 1026617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1027ac27a0ecSDave Kleikamp return -ENOMEM; 1028ac27a0ecSDave Kleikamp return 0; 1029ac27a0ecSDave Kleikamp } 1030ac27a0ecSDave Kleikamp 1031ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1032ac27a0ecSDave Kleikamp { 1033617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1034ac27a0ecSDave Kleikamp } 1035ac27a0ecSDave Kleikamp 10360930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1037ac27a0ecSDave Kleikamp { 10380930fcc1SAl Viro invalidate_inode_buffers(inode); 1039dbd5768fSJan Kara clear_inode(inode); 10409f754758SChristoph Hellwig dquot_drop(inode); 1041c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 10428aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10438aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10448aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10458aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10468aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10478aefcd55STheodore Ts'o } 1048ac27a0ecSDave Kleikamp } 1049ac27a0ecSDave Kleikamp 10501b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10511b961ac0SChristoph Hellwig u64 ino, u32 generation) 1052ac27a0ecSDave Kleikamp { 1053ac27a0ecSDave Kleikamp struct inode *inode; 1054ac27a0ecSDave Kleikamp 1055617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1056ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1057617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1058ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1059ac27a0ecSDave Kleikamp 1060ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1061ac27a0ecSDave Kleikamp * 1062617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1063ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1064ac27a0ecSDave Kleikamp * 1065ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1066ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1067ac27a0ecSDave Kleikamp */ 10681d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10691d1fe1eeSDavid Howells if (IS_ERR(inode)) 10701d1fe1eeSDavid Howells return ERR_CAST(inode); 10711d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1072ac27a0ecSDave Kleikamp iput(inode); 1073ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1074ac27a0ecSDave Kleikamp } 10751b961ac0SChristoph Hellwig 10761b961ac0SChristoph Hellwig return inode; 1077ac27a0ecSDave Kleikamp } 10781b961ac0SChristoph Hellwig 10791b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10801b961ac0SChristoph Hellwig int fh_len, int fh_type) 10811b961ac0SChristoph Hellwig { 10821b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10831b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10841b961ac0SChristoph Hellwig } 10851b961ac0SChristoph Hellwig 10861b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10871b961ac0SChristoph Hellwig int fh_len, int fh_type) 10881b961ac0SChristoph Hellwig { 10891b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10901b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1091ac27a0ecSDave Kleikamp } 1092ac27a0ecSDave Kleikamp 1093c39a7f84SToshiyuki Okajima /* 1094c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1095c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1096c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1097c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1098c39a7f84SToshiyuki Okajima */ 10990b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11000b8e58a1SAndreas Dilger gfp_t wait) 1101c39a7f84SToshiyuki Okajima { 1102c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1103c39a7f84SToshiyuki Okajima 1104c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1105c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1106c39a7f84SToshiyuki Okajima return 0; 1107c39a7f84SToshiyuki Okajima if (journal) 1108c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1109c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1110c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1111c39a7f84SToshiyuki Okajima } 1112c39a7f84SToshiyuki Okajima 1113ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1114ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1115ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1116ac27a0ecSDave Kleikamp 1117617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1118617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1119617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1120617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1121617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11226f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1123f00c9e44SJan Kara struct path *path); 11247c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 11257c319d32SAditya Kali int format_id); 1126ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 11277c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type); 1128617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1129617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1130ac27a0ecSDave Kleikamp size_t len, loff_t off); 1131617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1132ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 11337c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 11347c319d32SAditya Kali unsigned int flags); 11357c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1136ac27a0ecSDave Kleikamp 113761e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 113860e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1139617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1140617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1141617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1142617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1143a5b5ee32SJan Kara .write_info = ext4_write_info, 1144a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1145a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1146ac27a0ecSDave Kleikamp }; 1147ac27a0ecSDave Kleikamp 11480d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1149617ba13bSMingming Cao .quota_on = ext4_quota_on, 1150ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1151287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1152287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1153287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1154287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1155287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1156ac27a0ecSDave Kleikamp }; 11577c319d32SAditya Kali 11587c319d32SAditya Kali static const struct quotactl_ops ext4_qctl_sysfile_operations = { 11597c319d32SAditya Kali .quota_on_meta = ext4_quota_on_sysfile, 11607c319d32SAditya Kali .quota_off = ext4_quota_off_sysfile, 11617c319d32SAditya Kali .quota_sync = dquot_quota_sync, 11627c319d32SAditya Kali .get_info = dquot_get_dqinfo, 11637c319d32SAditya Kali .set_info = dquot_set_dqinfo, 11647c319d32SAditya Kali .get_dqblk = dquot_get_dqblk, 11657c319d32SAditya Kali .set_dqblk = dquot_set_dqblk 11667c319d32SAditya Kali }; 1167ac27a0ecSDave Kleikamp #endif 1168ac27a0ecSDave Kleikamp 1169ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1170617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1171617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1172617ba13bSMingming Cao .write_inode = ext4_write_inode, 1173617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11747ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11750930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1176617ba13bSMingming Cao .put_super = ext4_put_super, 1177617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1178c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1179c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1180617ba13bSMingming Cao .statfs = ext4_statfs, 1181617ba13bSMingming Cao .remount_fs = ext4_remount, 1182617ba13bSMingming Cao .show_options = ext4_show_options, 1183ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1184617ba13bSMingming Cao .quota_read = ext4_quota_read, 1185617ba13bSMingming Cao .quota_write = ext4_quota_write, 1186ac27a0ecSDave Kleikamp #endif 1187c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1188ac27a0ecSDave Kleikamp }; 1189ac27a0ecSDave Kleikamp 11909ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11919ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11929ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11939ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11949ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11957ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11960930fcc1SAl Viro .evict_inode = ext4_evict_inode, 11979ca92389STheodore Ts'o .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, 1233df981d03STheodore Ts'o Opt_max_dir_size_kb, 1234ac27a0ecSDave Kleikamp }; 1235ac27a0ecSDave Kleikamp 1236a447c093SSteven Whitehouse static const match_table_t tokens = { 1237ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1238ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1239ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1240ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1241ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1242ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1243ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1244ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1245ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1246ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1247ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1248ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1249ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1250ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 125172578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 125272578c33STheodore Ts'o {Opt_removed, "orlov"}, 1253ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1254ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1255ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1256ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1257e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 12585a916be1STheodore Ts'o {Opt_noload, "noload"}, 125972578c33STheodore Ts'o {Opt_removed, "nobh"}, 126072578c33STheodore Ts'o {Opt_removed, "bh"}, 1261ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 126230773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 126330773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1264ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1265818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1266818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1267ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1268ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1269ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1270ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12715bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12725bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1273ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1274ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1275ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1276ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1277ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1278ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12795a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1280ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1281ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1282ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1283ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1284ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 128506705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 128606705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 128725ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1288c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 128964769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1290dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 12911449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 12921449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 12936fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12946fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1295240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1296b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1297afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 129806705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 129906705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1300744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1301744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13025328e635SEric Sandeen {Opt_discard, "discard"}, 13035328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1304fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1305fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1306fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1307df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1308c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1309c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1310c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1311c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1312c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1313f3f12faaSJosef Bacik {Opt_err, NULL}, 1314ac27a0ecSDave Kleikamp }; 1315ac27a0ecSDave Kleikamp 1316617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1317ac27a0ecSDave Kleikamp { 1318617ba13bSMingming Cao ext4_fsblk_t sb_block; 1319ac27a0ecSDave Kleikamp char *options = (char *) *data; 1320ac27a0ecSDave Kleikamp 1321ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1322ac27a0ecSDave Kleikamp return 1; /* Default location */ 13230b8e58a1SAndreas Dilger 1324ac27a0ecSDave Kleikamp options += 3; 13250b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1326ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1327ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13284776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1329ac27a0ecSDave Kleikamp (char *) *data); 1330ac27a0ecSDave Kleikamp return 1; 1331ac27a0ecSDave Kleikamp } 1332ac27a0ecSDave Kleikamp if (*options == ',') 1333ac27a0ecSDave Kleikamp options++; 1334ac27a0ecSDave Kleikamp *data = (void *) options; 13350b8e58a1SAndreas Dilger 1336ac27a0ecSDave Kleikamp return sb_block; 1337ac27a0ecSDave Kleikamp } 1338ac27a0ecSDave Kleikamp 1339b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1340437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1341437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1342b3881f74STheodore Ts'o 134356c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 134456c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 134556c50f11SDmitry Monakhov { 134656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 134756c50f11SDmitry Monakhov char *qname; 134856c50f11SDmitry Monakhov 134956c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 135056c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 135156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 135256c50f11SDmitry Monakhov "Cannot change journaled " 135356c50f11SDmitry Monakhov "quota options when quota turned on"); 135457f73c2cSTheodore Ts'o return -1; 135556c50f11SDmitry Monakhov } 135656c50f11SDmitry Monakhov qname = match_strdup(args); 135756c50f11SDmitry Monakhov if (!qname) { 135856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 135956c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 136057f73c2cSTheodore Ts'o return -1; 136156c50f11SDmitry Monakhov } 136256c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 136356c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 136456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 136556c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 136656c50f11SDmitry Monakhov kfree(qname); 136757f73c2cSTheodore Ts'o return -1; 136856c50f11SDmitry Monakhov } 136956c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 137056c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 137156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 137256c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 137356c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 137456c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 137557f73c2cSTheodore Ts'o return -1; 137656c50f11SDmitry Monakhov } 1377fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 137856c50f11SDmitry Monakhov return 1; 137956c50f11SDmitry Monakhov } 138056c50f11SDmitry Monakhov 138156c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 138256c50f11SDmitry Monakhov { 138356c50f11SDmitry Monakhov 138456c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 138556c50f11SDmitry Monakhov 138656c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 138756c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 138856c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 138956c50f11SDmitry Monakhov " when quota turned on"); 139057f73c2cSTheodore Ts'o return -1; 139156c50f11SDmitry Monakhov } 139256c50f11SDmitry Monakhov /* 139356c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 139456c50f11SDmitry Monakhov * to be correct 139556c50f11SDmitry Monakhov */ 139656c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 139756c50f11SDmitry Monakhov return 1; 139856c50f11SDmitry Monakhov } 139956c50f11SDmitry Monakhov #endif 140056c50f11SDmitry Monakhov 140126092bf5STheodore Ts'o #define MOPT_SET 0x0001 140226092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 140326092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 140426092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 140526092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 140626092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 140726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 140826092bf5STheodore Ts'o #define MOPT_Q 0 140926092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 141026092bf5STheodore Ts'o #else 141126092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 141226092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 141326092bf5STheodore Ts'o #endif 141426092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 141526092bf5STheodore Ts'o 141626092bf5STheodore Ts'o static const struct mount_opts { 141726092bf5STheodore Ts'o int token; 141826092bf5STheodore Ts'o int mount_opt; 141926092bf5STheodore Ts'o int flags; 142026092bf5STheodore Ts'o } ext4_mount_opts[] = { 142126092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 142226092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 142326092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 142426092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 142526092bf5STheodore Ts'o {Opt_mblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_SET}, 142626092bf5STheodore Ts'o {Opt_nomblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_CLEAR}, 142726092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 142826092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 142926092bf5STheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_SET}, 143026092bf5STheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_CLEAR}, 143126092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 143226092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 143326092bf5STheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, MOPT_SET | MOPT_EXPLICIT}, 143426092bf5STheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, MOPT_CLEAR | MOPT_EXPLICIT}, 143526092bf5STheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, MOPT_SET}, 143626092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 143726092bf5STheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), MOPT_SET}, 143826092bf5STheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_SET}, 143926092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 144026092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 144126092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 144226092bf5STheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_SET}, 144326092bf5STheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_CLEAR}, 144426092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 144526092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 144626092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 144726092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 144826092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 144926092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 145026092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 145126092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 145226092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 145326092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 145426092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 145526092bf5STheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ}, 145626092bf5STheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ}, 145726092bf5STheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ}, 145826092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 145926092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 146026092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 146126092bf5STheodore Ts'o #else 146226092bf5STheodore Ts'o {Opt_user_xattr, 0, MOPT_NOSUPPORT}, 146326092bf5STheodore Ts'o {Opt_nouser_xattr, 0, MOPT_NOSUPPORT}, 146426092bf5STheodore Ts'o #endif 146526092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 146626092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 146726092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 146826092bf5STheodore Ts'o #else 146926092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 147026092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 147126092bf5STheodore Ts'o #endif 147226092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 147326092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 147426092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 147526092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 147626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 147726092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 147826092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 147926092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 148026092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 148126092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 148226092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 148326092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 148426092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 148526092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 148626092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 148726092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1488df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 148926092bf5STheodore Ts'o {Opt_err, 0, 0} 149026092bf5STheodore Ts'o }; 149126092bf5STheodore Ts'o 149226092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 149326092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 149426092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 149526092bf5STheodore Ts'o { 149626092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 149726092bf5STheodore Ts'o const struct mount_opts *m; 149808cefc7aSEric W. Biederman kuid_t uid; 149908cefc7aSEric W. Biederman kgid_t gid; 150026092bf5STheodore Ts'o int arg = 0; 150126092bf5STheodore Ts'o 150257f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 150357f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 150457f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 150557f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 150657f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 150757f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 150857f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 150957f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 151057f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 151157f73c2cSTheodore Ts'o #endif 151226092bf5STheodore Ts'o if (args->from && match_int(args, &arg)) 151326092bf5STheodore Ts'o return -1; 151426092bf5STheodore Ts'o switch (token) { 1515f7048605STheodore Ts'o case Opt_noacl: 1516f7048605STheodore Ts'o case Opt_nouser_xattr: 1517f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1518f7048605STheodore Ts'o break; 151926092bf5STheodore Ts'o case Opt_sb: 152026092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 152126092bf5STheodore Ts'o case Opt_removed: 152226092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 152326092bf5STheodore Ts'o "Ignoring removed %s option", opt); 152426092bf5STheodore Ts'o return 1; 152526092bf5STheodore Ts'o case Opt_resuid: 152608cefc7aSEric W. Biederman uid = make_kuid(current_user_ns(), arg); 152708cefc7aSEric W. Biederman if (!uid_valid(uid)) { 152808cefc7aSEric W. Biederman ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 152908cefc7aSEric W. Biederman return -1; 153008cefc7aSEric W. Biederman } 153108cefc7aSEric W. Biederman sbi->s_resuid = uid; 153226092bf5STheodore Ts'o return 1; 153326092bf5STheodore Ts'o case Opt_resgid: 153408cefc7aSEric W. Biederman gid = make_kgid(current_user_ns(), arg); 153508cefc7aSEric W. Biederman if (!gid_valid(gid)) { 153608cefc7aSEric W. Biederman ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 153708cefc7aSEric W. Biederman return -1; 153808cefc7aSEric W. Biederman } 153908cefc7aSEric W. Biederman sbi->s_resgid = gid; 154026092bf5STheodore Ts'o return 1; 154126092bf5STheodore Ts'o case Opt_abort: 154226092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 154326092bf5STheodore Ts'o return 1; 154426092bf5STheodore Ts'o case Opt_i_version: 154526092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 154626092bf5STheodore Ts'o return 1; 154726092bf5STheodore Ts'o case Opt_journal_dev: 154826092bf5STheodore Ts'o if (is_remount) { 154926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 155026092bf5STheodore Ts'o "Cannot specify journal on remount"); 155126092bf5STheodore Ts'o return -1; 155226092bf5STheodore Ts'o } 155326092bf5STheodore Ts'o *journal_devnum = arg; 155426092bf5STheodore Ts'o return 1; 155526092bf5STheodore Ts'o case Opt_journal_ioprio: 155626092bf5STheodore Ts'o if (arg < 0 || arg > 7) 155726092bf5STheodore Ts'o return -1; 155826092bf5STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 155926092bf5STheodore Ts'o return 1; 156026092bf5STheodore Ts'o } 156126092bf5STheodore Ts'o 156226092bf5STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 156326092bf5STheodore Ts'o if (token != m->token) 156426092bf5STheodore Ts'o continue; 156526092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 156626092bf5STheodore Ts'o return -1; 156726092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 156826092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 156926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 157026092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 157126092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 157226092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 157326092bf5STheodore Ts'o "options when quota turned on"); 157426092bf5STheodore Ts'o return -1; 157526092bf5STheodore Ts'o } 157626092bf5STheodore Ts'o 157726092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 157826092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 157926092bf5STheodore Ts'o } else if (token == Opt_commit) { 158026092bf5STheodore Ts'o if (arg == 0) 158126092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 158226092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 158326092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 158426092bf5STheodore Ts'o if (arg == 0) 158526092bf5STheodore Ts'o arg = EXT4_DEF_MAX_BATCH_TIME; 158626092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 158726092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 158826092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 158926092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 159026092bf5STheodore Ts'o if (arg > (1 << 30)) 159126092bf5STheodore Ts'o return -1; 159226092bf5STheodore Ts'o if (arg && !is_power_of_2(arg)) { 159326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 159426092bf5STheodore Ts'o "EXT4-fs: inode_readahead_blks" 159526092bf5STheodore Ts'o " must be a power of 2"); 159626092bf5STheodore Ts'o return -1; 159726092bf5STheodore Ts'o } 159826092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 159926092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 160026092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 160126092bf5STheodore Ts'o if (!args->from) 160226092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 160326092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1604df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1605df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 160626092bf5STheodore Ts'o } else if (token == Opt_stripe) { 160726092bf5STheodore Ts'o sbi->s_stripe = arg; 160826092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 160926092bf5STheodore Ts'o if (is_remount) { 161026092bf5STheodore Ts'o if (!sbi->s_journal) 161126092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 161226092bf5STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) != 161326092bf5STheodore Ts'o m->mount_opt) { 161426092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 161526092bf5STheodore Ts'o "Cannot change data mode on remount"); 161626092bf5STheodore Ts'o return -1; 161726092bf5STheodore Ts'o } 161826092bf5STheodore Ts'o } else { 161926092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 162026092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 162126092bf5STheodore Ts'o } 162226092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 162326092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 162426092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 162526092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 162626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot " 162726092bf5STheodore Ts'o "change journaled quota options " 162826092bf5STheodore Ts'o "when quota turned on"); 162926092bf5STheodore Ts'o return -1; 163026092bf5STheodore Ts'o } 163126092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 163226092bf5STheodore Ts'o #endif 163326092bf5STheodore Ts'o } else { 163426092bf5STheodore Ts'o if (!args->from) 163526092bf5STheodore Ts'o arg = 1; 163626092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 163726092bf5STheodore Ts'o arg = !arg; 163826092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 163926092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 164026092bf5STheodore Ts'o "buggy handling of option %s", opt); 164126092bf5STheodore Ts'o WARN_ON(1); 164226092bf5STheodore Ts'o return -1; 164326092bf5STheodore Ts'o } 164426092bf5STheodore Ts'o if (arg != 0) 164526092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 164626092bf5STheodore Ts'o else 164726092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 164826092bf5STheodore Ts'o } 164926092bf5STheodore Ts'o return 1; 165026092bf5STheodore Ts'o } 165126092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 165226092bf5STheodore Ts'o "or missing value", opt); 165326092bf5STheodore Ts'o return -1; 165426092bf5STheodore Ts'o } 165526092bf5STheodore Ts'o 1656ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1657c3191067STheodore Ts'o unsigned long *journal_devnum, 1658b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1659661aa520SEric Sandeen int is_remount) 1660ac27a0ecSDave Kleikamp { 1661db7e5c66SEldad Zack #ifdef CONFIG_QUOTA 1662617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1663db7e5c66SEldad Zack #endif 1664ac27a0ecSDave Kleikamp char *p; 1665ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 166626092bf5STheodore Ts'o int token; 1667ac27a0ecSDave Kleikamp 1668ac27a0ecSDave Kleikamp if (!options) 1669ac27a0ecSDave Kleikamp return 1; 1670ac27a0ecSDave Kleikamp 1671ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1672ac27a0ecSDave Kleikamp if (!*p) 1673ac27a0ecSDave Kleikamp continue; 167415121c18SEric Sandeen /* 167515121c18SEric Sandeen * Initialize args struct so we know whether arg was 167615121c18SEric Sandeen * found; some options take optional arguments. 167715121c18SEric Sandeen */ 167826092bf5STheodore Ts'o args[0].to = args[0].from = 0; 1679ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 168026092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 168126092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1682ac27a0ecSDave Kleikamp return 0; 1683ac27a0ecSDave Kleikamp } 1684ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1685ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1686482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1687fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1688ac27a0ecSDave Kleikamp 1689482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1690fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1691ac27a0ecSDave Kleikamp 169256c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1693b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1694b31e1552SEric Sandeen "format mixing"); 1695ac27a0ecSDave Kleikamp return 0; 1696ac27a0ecSDave Kleikamp } 1697ac27a0ecSDave Kleikamp 1698ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1699b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1700b31e1552SEric Sandeen "not specified"); 1701ac27a0ecSDave Kleikamp return 0; 1702ac27a0ecSDave Kleikamp } 1703ac27a0ecSDave Kleikamp } else { 1704ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1705b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 17062c8be6b2SJan Kara "specified with no journaling " 1707b31e1552SEric Sandeen "enabled"); 1708ac27a0ecSDave Kleikamp return 0; 1709ac27a0ecSDave Kleikamp } 1710ac27a0ecSDave Kleikamp } 1711ac27a0ecSDave Kleikamp #endif 1712ac27a0ecSDave Kleikamp return 1; 1713ac27a0ecSDave Kleikamp } 1714ac27a0ecSDave Kleikamp 17152adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17162adf6da8STheodore Ts'o struct super_block *sb) 17172adf6da8STheodore Ts'o { 17182adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17192adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17202adf6da8STheodore Ts'o 17212adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17222adf6da8STheodore Ts'o char *fmtname = ""; 17232adf6da8STheodore Ts'o 17242adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17252adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17262adf6da8STheodore Ts'o fmtname = "vfsold"; 17272adf6da8STheodore Ts'o break; 17282adf6da8STheodore Ts'o case QFMT_VFS_V0: 17292adf6da8STheodore Ts'o fmtname = "vfsv0"; 17302adf6da8STheodore Ts'o break; 17312adf6da8STheodore Ts'o case QFMT_VFS_V1: 17322adf6da8STheodore Ts'o fmtname = "vfsv1"; 17332adf6da8STheodore Ts'o break; 17342adf6da8STheodore Ts'o } 17352adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17362adf6da8STheodore Ts'o } 17372adf6da8STheodore Ts'o 17382adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17392adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17402adf6da8STheodore Ts'o 17412adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17422adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17432adf6da8STheodore Ts'o 17442adf6da8STheodore Ts'o if (test_opt(sb, USRQUOTA)) 17452adf6da8STheodore Ts'o seq_puts(seq, ",usrquota"); 17462adf6da8STheodore Ts'o 17472adf6da8STheodore Ts'o if (test_opt(sb, GRPQUOTA)) 17482adf6da8STheodore Ts'o seq_puts(seq, ",grpquota"); 17492adf6da8STheodore Ts'o #endif 17502adf6da8STheodore Ts'o } 17512adf6da8STheodore Ts'o 17525a916be1STheodore Ts'o static const char *token2str(int token) 17535a916be1STheodore Ts'o { 17545a916be1STheodore Ts'o static const struct match_token *t; 17555a916be1STheodore Ts'o 17565a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17575a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17585a916be1STheodore Ts'o break; 17595a916be1STheodore Ts'o return t->pattern; 17605a916be1STheodore Ts'o } 17615a916be1STheodore Ts'o 17622adf6da8STheodore Ts'o /* 17632adf6da8STheodore Ts'o * Show an option if 17642adf6da8STheodore Ts'o * - it's set to a non-default value OR 17652adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17662adf6da8STheodore Ts'o */ 176766acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 176866acdcf4STheodore Ts'o int nodefs) 17692adf6da8STheodore Ts'o { 17702adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17712adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 177266acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17735a916be1STheodore Ts'o const struct mount_opts *m; 177466acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17752adf6da8STheodore Ts'o 177666acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 177766acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17782adf6da8STheodore Ts'o 17792adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17805a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17815a916be1STheodore Ts'o 17825a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17835a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17845a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17855a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17865a916be1STheodore Ts'o continue; 178766acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17885a916be1STheodore Ts'o continue; /* skip if same as the default */ 17895a916be1STheodore Ts'o if ((want_set && 17905a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17915a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17925a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17935a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17945a916be1STheodore Ts'o } 17955a916be1STheodore Ts'o 179608cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17975a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 179808cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 179908cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 180008cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 18015a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 180208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 180308cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 180466acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 18055a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18065a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18072adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18085a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18092adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18105a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 181166acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18125a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 181366acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18145a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 181566acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18165a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18172adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18185a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 181966acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18205a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 182166acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18222adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18235a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18242adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18255a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18262adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18275a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18285a916be1STheodore Ts'o } 182966acdcf4STheodore Ts'o if (nodefs || 183066acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18315a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18322adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18332adf6da8STheodore Ts'o 183466acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 183566acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18365a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1837df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1838df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18392adf6da8STheodore Ts'o 18402adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18412adf6da8STheodore Ts'o return 0; 18422adf6da8STheodore Ts'o } 18432adf6da8STheodore Ts'o 184466acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 184566acdcf4STheodore Ts'o { 184666acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 184766acdcf4STheodore Ts'o } 184866acdcf4STheodore Ts'o 184966acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 185066acdcf4STheodore Ts'o { 185166acdcf4STheodore Ts'o struct super_block *sb = seq->private; 185266acdcf4STheodore Ts'o int rc; 185366acdcf4STheodore Ts'o 185466acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 185566acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 185666acdcf4STheodore Ts'o seq_puts(seq, "\n"); 185766acdcf4STheodore Ts'o return rc; 185866acdcf4STheodore Ts'o } 185966acdcf4STheodore Ts'o 186066acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 186166acdcf4STheodore Ts'o { 186266acdcf4STheodore Ts'o return single_open(file, options_seq_show, PDE(inode)->data); 186366acdcf4STheodore Ts'o } 186466acdcf4STheodore Ts'o 186566acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 186666acdcf4STheodore Ts'o .owner = THIS_MODULE, 186766acdcf4STheodore Ts'o .open = options_open_fs, 186866acdcf4STheodore Ts'o .read = seq_read, 186966acdcf4STheodore Ts'o .llseek = seq_lseek, 187066acdcf4STheodore Ts'o .release = single_release, 187166acdcf4STheodore Ts'o }; 187266acdcf4STheodore Ts'o 1873617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1874ac27a0ecSDave Kleikamp int read_only) 1875ac27a0ecSDave Kleikamp { 1876617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1877ac27a0ecSDave Kleikamp int res = 0; 1878ac27a0ecSDave Kleikamp 1879617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1880b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1881b31e1552SEric Sandeen "forcing read-only mode"); 1882ac27a0ecSDave Kleikamp res = MS_RDONLY; 1883ac27a0ecSDave Kleikamp } 1884ac27a0ecSDave Kleikamp if (read_only) 1885281b5995STheodore Ts'o goto done; 1886617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1887b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1888b31e1552SEric Sandeen "running e2fsck is recommended"); 1889617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1890b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1891b31e1552SEric Sandeen "warning: mounting fs with errors, " 1892b31e1552SEric Sandeen "running e2fsck is recommended"); 1893ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1894ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1895ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1896b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1897b31e1552SEric Sandeen "warning: maximal mount count reached, " 1898b31e1552SEric Sandeen "running e2fsck is recommended"); 1899ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1900ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1901ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1902b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1903b31e1552SEric Sandeen "warning: checktime reached, " 1904b31e1552SEric Sandeen "running e2fsck is recommended"); 19050390131bSFrank Mayhar if (!sbi->s_journal) 1906216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1907ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1908617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1909e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1910ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1911617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19120390131bSFrank Mayhar if (sbi->s_journal) 1913617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1914ac27a0ecSDave Kleikamp 1915e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1916281b5995STheodore Ts'o done: 1917ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1918a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1919a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1920ac27a0ecSDave Kleikamp sb->s_blocksize, 1921ac27a0ecSDave Kleikamp sbi->s_groups_count, 1922617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1923617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1924a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1925ac27a0ecSDave Kleikamp 19267abc52c2SDan Magenheimer cleancache_init_fs(sb); 1927ac27a0ecSDave Kleikamp return res; 1928ac27a0ecSDave Kleikamp } 1929ac27a0ecSDave Kleikamp 1930772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1931772cb7c8SJose R. Santos { 1932772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1933772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1934772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1935772cb7c8SJose R. Santos ext4_group_t flex_group; 1936d50f2ab6SXi Wang unsigned int groups_per_flex = 0; 1937c5ca7c76STheodore Ts'o size_t size; 1938772cb7c8SJose R. Santos int i; 1939772cb7c8SJose R. Santos 1940503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1941d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1942772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1943772cb7c8SJose R. Santos return 1; 1944772cb7c8SJose R. Santos } 1945d50f2ab6SXi Wang groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1946772cb7c8SJose R. Santos 1947c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1948c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1949d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1950d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1951c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 19529933fc0aSTheodore Ts'o sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); 1953c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 19549933fc0aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", 195594de56abSJoe Perches flex_group_count); 1956772cb7c8SJose R. Santos goto failed; 1957772cb7c8SJose R. Santos } 1958772cb7c8SJose R. Santos 1959772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 196088b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1961772cb7c8SJose R. Santos 1962772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19637ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19647ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 1965021b65bbSTheodore Ts'o atomic_add(ext4_free_group_clusters(sb, gdp), 196624aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19677ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19687ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1969772cb7c8SJose R. Santos } 1970772cb7c8SJose R. Santos 1971772cb7c8SJose R. Santos return 1; 1972772cb7c8SJose R. Santos failed: 1973772cb7c8SJose R. Santos return 0; 1974772cb7c8SJose R. Santos } 1975772cb7c8SJose R. Santos 1976feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1977717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1978717d50e4SAndreas Dilger { 1979feb0ab32SDarrick J. Wong int offset; 1980717d50e4SAndreas Dilger __u16 crc = 0; 1981717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1982717d50e4SAndreas Dilger 1983feb0ab32SDarrick J. Wong if ((sbi->s_es->s_feature_ro_compat & 1984feb0ab32SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { 1985feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1986feb0ab32SDarrick J. Wong __u16 old_csum; 1987feb0ab32SDarrick J. Wong __u32 csum32; 1988feb0ab32SDarrick J. Wong 1989feb0ab32SDarrick J. Wong old_csum = gdp->bg_checksum; 1990feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 1991feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 1992feb0ab32SDarrick J. Wong sizeof(le_group)); 1993feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 1994feb0ab32SDarrick J. Wong sbi->s_desc_size); 1995feb0ab32SDarrick J. Wong gdp->bg_checksum = old_csum; 1996feb0ab32SDarrick J. Wong 1997feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 1998feb0ab32SDarrick J. Wong goto out; 1999feb0ab32SDarrick J. Wong } 2000feb0ab32SDarrick J. Wong 2001feb0ab32SDarrick J. Wong /* old crc16 code */ 2002feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2003feb0ab32SDarrick J. Wong 2004717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2005717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2006717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2007717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2008717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2009717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2010717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2011717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2012717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2013717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2014717d50e4SAndreas Dilger offset); 2015717d50e4SAndreas Dilger 2016feb0ab32SDarrick J. Wong out: 2017717d50e4SAndreas Dilger return cpu_to_le16(crc); 2018717d50e4SAndreas Dilger } 2019717d50e4SAndreas Dilger 2020feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2021717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2022717d50e4SAndreas Dilger { 2023feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2024feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2025feb0ab32SDarrick J. Wong block_group, gdp))) 2026717d50e4SAndreas Dilger return 0; 2027717d50e4SAndreas Dilger 2028717d50e4SAndreas Dilger return 1; 2029717d50e4SAndreas Dilger } 2030717d50e4SAndreas Dilger 2031feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2032feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2033feb0ab32SDarrick J. Wong { 2034feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2035feb0ab32SDarrick J. Wong return; 2036feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2037feb0ab32SDarrick J. Wong } 2038feb0ab32SDarrick J. Wong 2039ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2040bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2041bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2042ac27a0ecSDave Kleikamp { 2043617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2044617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2045617ba13bSMingming Cao ext4_fsblk_t last_block; 2046bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2047bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2048bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2049ce421581SJose R. Santos int flexbg_flag = 0; 2050bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2051ac27a0ecSDave Kleikamp 2052ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2053ce421581SJose R. Santos flexbg_flag = 1; 2054ce421581SJose R. Santos 2055617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2056ac27a0ecSDave Kleikamp 2057197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2058197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2059197cd65aSAkinobu Mita 2060ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2061bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2062ac27a0ecSDave Kleikamp else 2063ac27a0ecSDave Kleikamp last_block = first_block + 2064617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2065ac27a0ecSDave Kleikamp 2066bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2067bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2068bfff6873SLukas Czerner grp = i; 2069bfff6873SLukas Czerner 20708fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20712b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2072b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2073a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2074b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2075ac27a0ecSDave Kleikamp return 0; 2076ac27a0ecSDave Kleikamp } 20778fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20782b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2079b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2080a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2081b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2082ac27a0ecSDave Kleikamp return 0; 2083ac27a0ecSDave Kleikamp } 20848fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2085bd81d8eeSLaurent Vivier if (inode_table < first_block || 20862b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2087b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2088a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2089b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2090ac27a0ecSDave Kleikamp return 0; 2091ac27a0ecSDave Kleikamp } 2092955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2093feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2094b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2095b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2096fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2097fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20987ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2099955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2100717d50e4SAndreas Dilger return 0; 2101717d50e4SAndreas Dilger } 21027ee1ec4cSLi Zefan } 2103955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2104ce421581SJose R. Santos if (!flexbg_flag) 2105617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2106ac27a0ecSDave Kleikamp } 2107bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2108bfff6873SLukas Czerner *first_not_zeroed = grp; 2109ac27a0ecSDave Kleikamp 21105dee5437STheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 21115dee5437STheodore Ts'o EXT4_C2B(sbi, ext4_count_free_clusters(sb))); 2112617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2113ac27a0ecSDave Kleikamp return 1; 2114ac27a0ecSDave Kleikamp } 2115ac27a0ecSDave Kleikamp 2116617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2117ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2118ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2119ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2120ac27a0ecSDave Kleikamp * 2121ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2122ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2123ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2124ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2125ac27a0ecSDave Kleikamp * 2126ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2127ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2128ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2129617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2130ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2131ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2132ac27a0ecSDave Kleikamp */ 2133617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2134617ba13bSMingming Cao struct ext4_super_block *es) 2135ac27a0ecSDave Kleikamp { 2136ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2137ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2138ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2139ac27a0ecSDave Kleikamp int i; 2140ac27a0ecSDave Kleikamp #endif 2141ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2142ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2143ac27a0ecSDave Kleikamp return; 2144ac27a0ecSDave Kleikamp } 2145ac27a0ecSDave Kleikamp 2146a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2147b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2148b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2149a8f48a95SEric Sandeen return; 2150a8f48a95SEric Sandeen } 2151a8f48a95SEric Sandeen 2152d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2153d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2154d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2155d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2156d39195c3SAmir Goldstein return; 2157d39195c3SAmir Goldstein } 2158d39195c3SAmir Goldstein 2159617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2160ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2161ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2162ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2163ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2164ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2165ac27a0ecSDave Kleikamp return; 2166ac27a0ecSDave Kleikamp } 2167ac27a0ecSDave Kleikamp 2168ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2169b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2170ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2171ac27a0ecSDave Kleikamp } 2172ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2173ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2174ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2175ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2176ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2177617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2178617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2179ac27a0ecSDave Kleikamp if (ret < 0) 2180b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2181b31e1552SEric Sandeen "Cannot turn on journaled " 2182b31e1552SEric Sandeen "quota: error %d", ret); 2183ac27a0ecSDave Kleikamp } 2184ac27a0ecSDave Kleikamp } 2185ac27a0ecSDave Kleikamp #endif 2186ac27a0ecSDave Kleikamp 2187ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2188ac27a0ecSDave Kleikamp struct inode *inode; 2189ac27a0ecSDave Kleikamp 219097bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 219197bd42b9SJosef Bacik if (IS_ERR(inode)) { 2192ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2193ac27a0ecSDave Kleikamp break; 2194ac27a0ecSDave Kleikamp } 2195ac27a0ecSDave Kleikamp 2196617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2197871a2931SChristoph Hellwig dquot_initialize(inode); 2198ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2199b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2200b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 220146e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2202e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2203ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2204617ba13bSMingming Cao ext4_truncate(inode); 2205ac27a0ecSDave Kleikamp nr_truncates++; 2206ac27a0ecSDave Kleikamp } else { 2207b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2208b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 220946e665e9SHarvey Harrison __func__, inode->i_ino); 2210ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2211ac27a0ecSDave Kleikamp inode->i_ino); 2212ac27a0ecSDave Kleikamp nr_orphans++; 2213ac27a0ecSDave Kleikamp } 2214ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2215ac27a0ecSDave Kleikamp } 2216ac27a0ecSDave Kleikamp 2217ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2218ac27a0ecSDave Kleikamp 2219ac27a0ecSDave Kleikamp if (nr_orphans) 2220b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2221b31e1552SEric Sandeen PLURAL(nr_orphans)); 2222ac27a0ecSDave Kleikamp if (nr_truncates) 2223b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2224b31e1552SEric Sandeen PLURAL(nr_truncates)); 2225ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2226ac27a0ecSDave Kleikamp /* Turn quotas off */ 2227ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2228ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2229287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2230ac27a0ecSDave Kleikamp } 2231ac27a0ecSDave Kleikamp #endif 2232ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2233ac27a0ecSDave Kleikamp } 22340b8e58a1SAndreas Dilger 2235cd2291a4SEric Sandeen /* 2236cd2291a4SEric Sandeen * Maximal extent format file size. 2237cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2238cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2239cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2240cd2291a4SEric Sandeen * so that won't be a limiting factor. 2241cd2291a4SEric Sandeen * 2242f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2243f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2244f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2245f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2246f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2247f17722f9SLukas Czerner * 2248cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2249cd2291a4SEric Sandeen */ 2250f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2251cd2291a4SEric Sandeen { 2252cd2291a4SEric Sandeen loff_t res; 2253cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2254cd2291a4SEric Sandeen 2255cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2256f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2257cd2291a4SEric Sandeen /* 225890c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2259cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2260cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2261cd2291a4SEric Sandeen */ 2262cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2263cd2291a4SEric Sandeen 2264cd2291a4SEric Sandeen /* total blocks in file system block size */ 2265cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2266cd2291a4SEric Sandeen upper_limit <<= blkbits; 2267cd2291a4SEric Sandeen } 2268cd2291a4SEric Sandeen 2269f17722f9SLukas Czerner /* 2270f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2271f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2272f17722f9SLukas Czerner * size 2273f17722f9SLukas Czerner */ 2274f17722f9SLukas Czerner res = (1LL << 32) - 1; 2275cd2291a4SEric Sandeen res <<= blkbits; 2276cd2291a4SEric Sandeen 2277cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2278cd2291a4SEric Sandeen if (res > upper_limit) 2279cd2291a4SEric Sandeen res = upper_limit; 2280cd2291a4SEric Sandeen 2281cd2291a4SEric Sandeen return res; 2282cd2291a4SEric Sandeen } 2283ac27a0ecSDave Kleikamp 2284ac27a0ecSDave Kleikamp /* 2285cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22860fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22870fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2288ac27a0ecSDave Kleikamp */ 2289f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2290ac27a0ecSDave Kleikamp { 2291617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22920fc1b451SAneesh Kumar K.V int meta_blocks; 22930fc1b451SAneesh Kumar K.V loff_t upper_limit; 22940b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22950b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22960b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22970b8e58a1SAndreas Dilger * 22980b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22990b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23000fc1b451SAneesh Kumar K.V */ 23010fc1b451SAneesh Kumar K.V 2302f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23030fc1b451SAneesh Kumar K.V /* 230490c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23050b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23060b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23070fc1b451SAneesh Kumar K.V */ 23080fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23090fc1b451SAneesh Kumar K.V 23100fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23110fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23120fc1b451SAneesh Kumar K.V 23130fc1b451SAneesh Kumar K.V } else { 23148180a562SAneesh Kumar K.V /* 23158180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23168180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23178180a562SAneesh Kumar K.V * represent total number of blocks in 23188180a562SAneesh Kumar K.V * file system block size 23198180a562SAneesh Kumar K.V */ 23200fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23210fc1b451SAneesh Kumar K.V 23220fc1b451SAneesh Kumar K.V } 23230fc1b451SAneesh Kumar K.V 23240fc1b451SAneesh Kumar K.V /* indirect blocks */ 23250fc1b451SAneesh Kumar K.V meta_blocks = 1; 23260fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23270fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23280fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23290fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23300fc1b451SAneesh Kumar K.V 23310fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23320fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2333ac27a0ecSDave Kleikamp 2334ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2335ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2336ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2337ac27a0ecSDave Kleikamp res <<= bits; 2338ac27a0ecSDave Kleikamp if (res > upper_limit) 2339ac27a0ecSDave Kleikamp res = upper_limit; 23400fc1b451SAneesh Kumar K.V 23410fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23420fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23430fc1b451SAneesh Kumar K.V 2344ac27a0ecSDave Kleikamp return res; 2345ac27a0ecSDave Kleikamp } 2346ac27a0ecSDave Kleikamp 2347617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 234870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2349ac27a0ecSDave Kleikamp { 2350617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2351fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2352ac27a0ecSDave Kleikamp int has_super = 0; 2353ac27a0ecSDave Kleikamp 2354ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2355ac27a0ecSDave Kleikamp 2356617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2357ac27a0ecSDave Kleikamp nr < first_meta_bg) 235870bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2359ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2360617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2361ac27a0ecSDave Kleikamp has_super = 1; 23620b8e58a1SAndreas Dilger 2363617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2364ac27a0ecSDave Kleikamp } 2365ac27a0ecSDave Kleikamp 2366c9de560dSAlex Tomas /** 2367c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2368c9de560dSAlex Tomas * @sbi: In memory super block info 2369c9de560dSAlex Tomas * 2370c9de560dSAlex Tomas * If we have specified it via mount option, then 2371c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2372c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2373c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2374c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2375c9de560dSAlex Tomas * 2376c9de560dSAlex Tomas */ 2377c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2378c9de560dSAlex Tomas { 2379c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2380c9de560dSAlex Tomas unsigned long stripe_width = 2381c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 23823eb08658SDan Ehrenberg int ret; 2383c9de560dSAlex Tomas 2384c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 23853eb08658SDan Ehrenberg ret = sbi->s_stripe; 23863eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 23873eb08658SDan Ehrenberg ret = stripe_width; 23883eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 23893eb08658SDan Ehrenberg ret = stride; 23903eb08658SDan Ehrenberg else 23913eb08658SDan Ehrenberg ret = 0; 2392c9de560dSAlex Tomas 23933eb08658SDan Ehrenberg /* 23943eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 23953eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 23963eb08658SDan Ehrenberg */ 23973eb08658SDan Ehrenberg if (ret <= 1) 23983eb08658SDan Ehrenberg ret = 0; 2399c9de560dSAlex Tomas 24003eb08658SDan Ehrenberg return ret; 2401c9de560dSAlex Tomas } 2402ac27a0ecSDave Kleikamp 24033197ebdbSTheodore Ts'o /* sysfs supprt */ 24043197ebdbSTheodore Ts'o 24053197ebdbSTheodore Ts'o struct ext4_attr { 24063197ebdbSTheodore Ts'o struct attribute attr; 24073197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24083197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24093197ebdbSTheodore Ts'o const char *, size_t); 24103197ebdbSTheodore Ts'o int offset; 24113197ebdbSTheodore Ts'o }; 24123197ebdbSTheodore Ts'o 24133197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 24143197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 24153197ebdbSTheodore Ts'o { 24163197ebdbSTheodore Ts'o char *endp; 24173197ebdbSTheodore Ts'o 2418e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2419e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 24203197ebdbSTheodore Ts'o if (*endp || *value > max) 24213197ebdbSTheodore Ts'o return -EINVAL; 24223197ebdbSTheodore Ts'o 24233197ebdbSTheodore Ts'o return 0; 24243197ebdbSTheodore Ts'o } 24253197ebdbSTheodore Ts'o 24263197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24273197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24283197ebdbSTheodore Ts'o char *buf) 24293197ebdbSTheodore Ts'o { 24303197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24317b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24327b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24333197ebdbSTheodore Ts'o } 24343197ebdbSTheodore Ts'o 24353197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24363197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24373197ebdbSTheodore Ts'o { 24383197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24393197ebdbSTheodore Ts'o 2440f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2441f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24423197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24433197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24443197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24453197ebdbSTheodore Ts'o } 24463197ebdbSTheodore Ts'o 24473197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24483197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24493197ebdbSTheodore Ts'o { 24503197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24513197ebdbSTheodore Ts'o 2452f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2453f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24543197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2455a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24563197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2457a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24583197ebdbSTheodore Ts'o } 24593197ebdbSTheodore Ts'o 24603197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24613197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24623197ebdbSTheodore Ts'o const char *buf, size_t count) 24633197ebdbSTheodore Ts'o { 24643197ebdbSTheodore Ts'o unsigned long t; 24653197ebdbSTheodore Ts'o 24663197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 24673197ebdbSTheodore Ts'o return -EINVAL; 24683197ebdbSTheodore Ts'o 24695dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 24703197ebdbSTheodore Ts'o return -EINVAL; 24713197ebdbSTheodore Ts'o 24723197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24733197ebdbSTheodore Ts'o return count; 24743197ebdbSTheodore Ts'o } 24753197ebdbSTheodore Ts'o 24763197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24773197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24783197ebdbSTheodore Ts'o { 24793197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24803197ebdbSTheodore Ts'o 24813197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24823197ebdbSTheodore Ts'o } 24833197ebdbSTheodore Ts'o 24843197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 24853197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24863197ebdbSTheodore Ts'o const char *buf, size_t count) 24873197ebdbSTheodore Ts'o { 24883197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24893197ebdbSTheodore Ts'o unsigned long t; 24903197ebdbSTheodore Ts'o 24913197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24923197ebdbSTheodore Ts'o return -EINVAL; 24933197ebdbSTheodore Ts'o *ui = t; 24943197ebdbSTheodore Ts'o return count; 24953197ebdbSTheodore Ts'o } 24963197ebdbSTheodore Ts'o 24972c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 24982c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 24992c0544b2STheodore Ts'o const char *buf, size_t count) 25002c0544b2STheodore Ts'o { 25012c0544b2STheodore Ts'o int len = count; 25022c0544b2STheodore Ts'o 25032c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25042c0544b2STheodore Ts'o return -EPERM; 25052c0544b2STheodore Ts'o 25062c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25072c0544b2STheodore Ts'o len--; 25082c0544b2STheodore Ts'o 25092c0544b2STheodore Ts'o if (len) 25102c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25112c0544b2STheodore Ts'o return count; 25122c0544b2STheodore Ts'o } 25132c0544b2STheodore Ts'o 25143197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25153197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25163197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25173197ebdbSTheodore Ts'o .show = _show, \ 25183197ebdbSTheodore Ts'o .store = _store, \ 25193197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 25203197ebdbSTheodore Ts'o } 25213197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25223197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 25233197ebdbSTheodore Ts'o 2524857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 25253197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 25263197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 25273197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 25283197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 25293197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 25303197ebdbSTheodore Ts'o 25313197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 25323197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 25333197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 25343197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 25353197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 253611013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 25373197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 25383197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 25393197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 25403197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 25413197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 25423197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 254355138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 2544*67a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 25452c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 25463197ebdbSTheodore Ts'o 25473197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 25483197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 25493197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 25503197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 25513197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 255211013911SAndreas Dilger ATTR_LIST(inode_goal), 25533197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 25543197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 25553197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 25563197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 25573197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 25583197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 255955138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 2560*67a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 25612c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 25623197ebdbSTheodore Ts'o NULL, 25633197ebdbSTheodore Ts'o }; 25643197ebdbSTheodore Ts'o 2565857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2566857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 256727ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2568857ac889SLukas Czerner 2569857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2570857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 257127ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2572857ac889SLukas Czerner NULL, 2573857ac889SLukas Czerner }; 2574857ac889SLukas Czerner 25753197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 25763197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 25773197ebdbSTheodore Ts'o { 25783197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25793197ebdbSTheodore Ts'o s_kobj); 25803197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25813197ebdbSTheodore Ts'o 25823197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 25833197ebdbSTheodore Ts'o } 25843197ebdbSTheodore Ts'o 25853197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 25863197ebdbSTheodore Ts'o struct attribute *attr, 25873197ebdbSTheodore Ts'o const char *buf, size_t len) 25883197ebdbSTheodore Ts'o { 25893197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25903197ebdbSTheodore Ts'o s_kobj); 25913197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25923197ebdbSTheodore Ts'o 25933197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 25943197ebdbSTheodore Ts'o } 25953197ebdbSTheodore Ts'o 25963197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 25973197ebdbSTheodore Ts'o { 25983197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25993197ebdbSTheodore Ts'o s_kobj); 26003197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 26013197ebdbSTheodore Ts'o } 26023197ebdbSTheodore Ts'o 260352cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 26043197ebdbSTheodore Ts'o .show = ext4_attr_show, 26053197ebdbSTheodore Ts'o .store = ext4_attr_store, 26063197ebdbSTheodore Ts'o }; 26073197ebdbSTheodore Ts'o 26083197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 26093197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 26103197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 26113197ebdbSTheodore Ts'o .release = ext4_sb_release, 26123197ebdbSTheodore Ts'o }; 26133197ebdbSTheodore Ts'o 2614857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2615857ac889SLukas Czerner { 2616857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2617857ac889SLukas Czerner } 2618857ac889SLukas Czerner 2619857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2620857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2621857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2622857ac889SLukas Czerner .release = ext4_feat_release, 2623857ac889SLukas Czerner }; 2624857ac889SLukas Czerner 2625a13fb1a4SEric Sandeen /* 2626a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2627a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2628a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2629a13fb1a4SEric Sandeen * 0 if it cannot be. 2630a13fb1a4SEric Sandeen */ 2631a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2632a13fb1a4SEric Sandeen { 2633a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2634a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2635a13fb1a4SEric Sandeen "Couldn't mount because of " 2636a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2637a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2638a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2639a13fb1a4SEric Sandeen return 0; 2640a13fb1a4SEric Sandeen } 2641a13fb1a4SEric Sandeen 2642a13fb1a4SEric Sandeen if (readonly) 2643a13fb1a4SEric Sandeen return 1; 2644a13fb1a4SEric Sandeen 2645a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2646a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2647a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2648a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2649a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2650a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2651a13fb1a4SEric Sandeen return 0; 2652a13fb1a4SEric Sandeen } 2653a13fb1a4SEric Sandeen /* 2654a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2655a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2656a13fb1a4SEric Sandeen */ 2657a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2658a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2659a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2660a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2661a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2662a13fb1a4SEric Sandeen return 0; 2663a13fb1a4SEric Sandeen } 2664a13fb1a4SEric Sandeen } 2665bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2666bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2667bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2668bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2669bab08ab9STheodore Ts'o "extents feature\n"); 2670bab08ab9STheodore Ts'o return 0; 2671bab08ab9STheodore Ts'o } 26727c319d32SAditya Kali 26737c319d32SAditya Kali #ifndef CONFIG_QUOTA 26747c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 26757c319d32SAditya Kali !readonly) { 26767c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 26777c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 26787c319d32SAditya Kali "without CONFIG_QUOTA"); 26797c319d32SAditya Kali return 0; 26807c319d32SAditya Kali } 26817c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2682a13fb1a4SEric Sandeen return 1; 2683a13fb1a4SEric Sandeen } 2684a13fb1a4SEric Sandeen 268566e61a9eSTheodore Ts'o /* 268666e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 268766e61a9eSTheodore Ts'o * on the file system 268866e61a9eSTheodore Ts'o */ 268966e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 269066e61a9eSTheodore Ts'o { 269166e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 269266e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 269366e61a9eSTheodore Ts'o struct ext4_super_block *es; 269466e61a9eSTheodore Ts'o 269566e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 269666e61a9eSTheodore Ts'o es = sbi->s_es; 269766e61a9eSTheodore Ts'o 269866e61a9eSTheodore Ts'o if (es->s_error_count) 269966e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 270066e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 270166e61a9eSTheodore Ts'o if (es->s_first_error_time) { 270266e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 270366e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 270466e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 270566e61a9eSTheodore Ts'o es->s_first_error_func, 270666e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 270766e61a9eSTheodore Ts'o if (es->s_first_error_ino) 270866e61a9eSTheodore Ts'o printk(": inode %u", 270966e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 271066e61a9eSTheodore Ts'o if (es->s_first_error_block) 271166e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 271266e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 271366e61a9eSTheodore Ts'o printk("\n"); 271466e61a9eSTheodore Ts'o } 271566e61a9eSTheodore Ts'o if (es->s_last_error_time) { 271666e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 271766e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 271866e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 271966e61a9eSTheodore Ts'o es->s_last_error_func, 272066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 272166e61a9eSTheodore Ts'o if (es->s_last_error_ino) 272266e61a9eSTheodore Ts'o printk(": inode %u", 272366e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 272466e61a9eSTheodore Ts'o if (es->s_last_error_block) 272566e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 272666e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 272766e61a9eSTheodore Ts'o printk("\n"); 272866e61a9eSTheodore Ts'o } 272966e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 273066e61a9eSTheodore Ts'o } 273166e61a9eSTheodore Ts'o 2732bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2733bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2734bfff6873SLukas Czerner { 2735bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2736bfff6873SLukas Czerner ext4_group_t group, ngroups; 2737bfff6873SLukas Czerner struct super_block *sb; 2738bfff6873SLukas Czerner unsigned long timeout = 0; 2739bfff6873SLukas Czerner int ret = 0; 2740bfff6873SLukas Czerner 2741bfff6873SLukas Czerner sb = elr->lr_super; 2742bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2743bfff6873SLukas Czerner 27448e8ad8a5SJan Kara sb_start_write(sb); 2745bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2746bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2747bfff6873SLukas Czerner if (!gdp) { 2748bfff6873SLukas Czerner ret = 1; 2749bfff6873SLukas Czerner break; 2750bfff6873SLukas Czerner } 2751bfff6873SLukas Czerner 2752bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2753bfff6873SLukas Czerner break; 2754bfff6873SLukas Czerner } 2755bfff6873SLukas Czerner 2756bfff6873SLukas Czerner if (group == ngroups) 2757bfff6873SLukas Czerner ret = 1; 2758bfff6873SLukas Czerner 2759bfff6873SLukas Czerner if (!ret) { 2760bfff6873SLukas Czerner timeout = jiffies; 2761bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2762bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2763bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 276451ce6511SLukas Czerner timeout = (jiffies - timeout) * 276551ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2766bfff6873SLukas Czerner elr->lr_timeout = timeout; 2767bfff6873SLukas Czerner } 2768bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2769bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2770bfff6873SLukas Czerner } 27718e8ad8a5SJan Kara sb_end_write(sb); 2772bfff6873SLukas Czerner 2773bfff6873SLukas Czerner return ret; 2774bfff6873SLukas Czerner } 2775bfff6873SLukas Czerner 2776bfff6873SLukas Czerner /* 2777bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 27784ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2779bfff6873SLukas Czerner */ 2780bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2781bfff6873SLukas Czerner { 2782bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2783bfff6873SLukas Czerner 2784bfff6873SLukas Czerner if (!elr) 2785bfff6873SLukas Czerner return; 2786bfff6873SLukas Czerner 2787bfff6873SLukas Czerner sbi = elr->lr_sbi; 2788bfff6873SLukas Czerner 2789bfff6873SLukas Czerner list_del(&elr->lr_request); 2790bfff6873SLukas Czerner sbi->s_li_request = NULL; 2791bfff6873SLukas Czerner kfree(elr); 2792bfff6873SLukas Czerner } 2793bfff6873SLukas Czerner 2794bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2795bfff6873SLukas Czerner { 27961bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 27971bb933fbSLukas Czerner if (!ext4_li_info) { 27981bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2799bfff6873SLukas Czerner return; 28001bb933fbSLukas Czerner } 2801bfff6873SLukas Czerner 2802bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 28031bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2804bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 28051bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2806bfff6873SLukas Czerner } 2807bfff6873SLukas Czerner 28088f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 28098f1f7453SEric Sandeen 2810bfff6873SLukas Czerner /* 2811bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2812bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2813bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2814bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2815bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2816bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2817bfff6873SLukas Czerner * next waking time and put itself into sleep. 2818bfff6873SLukas Czerner */ 2819bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2820bfff6873SLukas Czerner { 2821bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2822bfff6873SLukas Czerner struct list_head *pos, *n; 2823bfff6873SLukas Czerner struct ext4_li_request *elr; 28244ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2825bfff6873SLukas Czerner 2826bfff6873SLukas Czerner BUG_ON(NULL == eli); 2827bfff6873SLukas Czerner 2828bfff6873SLukas Czerner cont_thread: 2829bfff6873SLukas Czerner while (true) { 2830bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2831bfff6873SLukas Czerner 2832bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2833bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2834bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2835bfff6873SLukas Czerner goto exit_thread; 2836bfff6873SLukas Czerner } 2837bfff6873SLukas Czerner 2838bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2839bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2840bfff6873SLukas Czerner lr_request); 2841bfff6873SLukas Czerner 2842b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2843b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2844b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2845bfff6873SLukas Czerner ext4_remove_li_request(elr); 2846bfff6873SLukas Czerner continue; 2847bfff6873SLukas Czerner } 2848b2c78cd0STheodore Ts'o } 2849bfff6873SLukas Czerner 2850bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2851bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2852bfff6873SLukas Czerner } 2853bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2854bfff6873SLukas Czerner 2855a0acae0eSTejun Heo try_to_freeze(); 2856bfff6873SLukas Czerner 28574ed5c033SLukas Czerner cur = jiffies; 28584ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2859f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2860bfff6873SLukas Czerner cond_resched(); 2861bfff6873SLukas Czerner continue; 2862bfff6873SLukas Czerner } 2863bfff6873SLukas Czerner 28644ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 28654ed5c033SLukas Czerner 28668f1f7453SEric Sandeen if (kthread_should_stop()) { 28678f1f7453SEric Sandeen ext4_clear_request_list(); 28688f1f7453SEric Sandeen goto exit_thread; 28698f1f7453SEric Sandeen } 2870bfff6873SLukas Czerner } 2871bfff6873SLukas Czerner 2872bfff6873SLukas Czerner exit_thread: 2873bfff6873SLukas Czerner /* 2874bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2875bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2876bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2877bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2878bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2879bfff6873SLukas Czerner * new one. 2880bfff6873SLukas Czerner */ 2881bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2882bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2883bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2884bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2885bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2886bfff6873SLukas Czerner goto cont_thread; 2887bfff6873SLukas Czerner } 2888bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2889bfff6873SLukas Czerner kfree(ext4_li_info); 2890bfff6873SLukas Czerner ext4_li_info = NULL; 2891bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2892bfff6873SLukas Czerner 2893bfff6873SLukas Czerner return 0; 2894bfff6873SLukas Czerner } 2895bfff6873SLukas Czerner 2896bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2897bfff6873SLukas Czerner { 2898bfff6873SLukas Czerner struct list_head *pos, *n; 2899bfff6873SLukas Czerner struct ext4_li_request *elr; 2900bfff6873SLukas Czerner 2901bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2902bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2903bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2904bfff6873SLukas Czerner lr_request); 2905bfff6873SLukas Czerner ext4_remove_li_request(elr); 2906bfff6873SLukas Czerner } 2907bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2908bfff6873SLukas Czerner } 2909bfff6873SLukas Czerner 2910bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2911bfff6873SLukas Czerner { 29128f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 29138f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 29148f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 29158f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2916bfff6873SLukas Czerner ext4_clear_request_list(); 2917bfff6873SLukas Czerner kfree(ext4_li_info); 2918bfff6873SLukas Czerner ext4_li_info = NULL; 291992b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2920bfff6873SLukas Czerner "initialization thread\n", 2921bfff6873SLukas Czerner err); 2922bfff6873SLukas Czerner return err; 2923bfff6873SLukas Czerner } 2924bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2925bfff6873SLukas Czerner return 0; 2926bfff6873SLukas Czerner } 2927bfff6873SLukas Czerner 2928bfff6873SLukas Czerner /* 2929bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2930bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2931bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2932bfff6873SLukas Czerner * groups and return total number of groups. 2933bfff6873SLukas Czerner */ 2934bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2935bfff6873SLukas Czerner { 2936bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2937bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2938bfff6873SLukas Czerner 2939bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2940bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2941bfff6873SLukas Czerner if (!gdp) 2942bfff6873SLukas Czerner continue; 2943bfff6873SLukas Czerner 2944bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2945bfff6873SLukas Czerner break; 2946bfff6873SLukas Czerner } 2947bfff6873SLukas Czerner 2948bfff6873SLukas Czerner return group; 2949bfff6873SLukas Czerner } 2950bfff6873SLukas Czerner 2951bfff6873SLukas Czerner static int ext4_li_info_new(void) 2952bfff6873SLukas Czerner { 2953bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2954bfff6873SLukas Czerner 2955bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2956bfff6873SLukas Czerner if (!eli) 2957bfff6873SLukas Czerner return -ENOMEM; 2958bfff6873SLukas Czerner 2959bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2960bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2961bfff6873SLukas Czerner 2962bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2963bfff6873SLukas Czerner 2964bfff6873SLukas Czerner ext4_li_info = eli; 2965bfff6873SLukas Czerner 2966bfff6873SLukas Czerner return 0; 2967bfff6873SLukas Czerner } 2968bfff6873SLukas Czerner 2969bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2970bfff6873SLukas Czerner ext4_group_t start) 2971bfff6873SLukas Czerner { 2972bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2973bfff6873SLukas Czerner struct ext4_li_request *elr; 2974bfff6873SLukas Czerner unsigned long rnd; 2975bfff6873SLukas Czerner 2976bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2977bfff6873SLukas Czerner if (!elr) 2978bfff6873SLukas Czerner return NULL; 2979bfff6873SLukas Czerner 2980bfff6873SLukas Czerner elr->lr_super = sb; 2981bfff6873SLukas Czerner elr->lr_sbi = sbi; 2982bfff6873SLukas Czerner elr->lr_next_group = start; 2983bfff6873SLukas Czerner 2984bfff6873SLukas Czerner /* 2985bfff6873SLukas Czerner * Randomize first schedule time of the request to 2986bfff6873SLukas Czerner * spread the inode table initialization requests 2987bfff6873SLukas Czerner * better. 2988bfff6873SLukas Czerner */ 2989bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2990bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2991bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2992bfff6873SLukas Czerner 2993bfff6873SLukas Czerner return elr; 2994bfff6873SLukas Czerner } 2995bfff6873SLukas Czerner 2996bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 2997bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2998bfff6873SLukas Czerner { 2999bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3000bfff6873SLukas Czerner struct ext4_li_request *elr; 3001bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 30026c5a6cb9SAndrew Morton int ret = 0; 3003bfff6873SLukas Czerner 300451ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 300551ce6511SLukas Czerner /* 300651ce6511SLukas Czerner * Reset timeout so it can be computed again, because 300751ce6511SLukas Czerner * s_li_wait_mult might have changed. 300851ce6511SLukas Czerner */ 300951ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 3010beed5ecbSNicolas Kaiser return 0; 301151ce6511SLukas Czerner } 3012bfff6873SLukas Czerner 3013bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3014bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 301555ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 3016beed5ecbSNicolas Kaiser return 0; 3017bfff6873SLukas Czerner 3018bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 3019beed5ecbSNicolas Kaiser if (!elr) 3020beed5ecbSNicolas Kaiser return -ENOMEM; 3021bfff6873SLukas Czerner 3022bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3023bfff6873SLukas Czerner 3024bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3025bfff6873SLukas Czerner ret = ext4_li_info_new(); 3026bfff6873SLukas Czerner if (ret) 3027bfff6873SLukas Czerner goto out; 3028bfff6873SLukas Czerner } 3029bfff6873SLukas Czerner 3030bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3031bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3032bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3033bfff6873SLukas Czerner 3034bfff6873SLukas Czerner sbi->s_li_request = elr; 303546e4690bSTao Ma /* 303646e4690bSTao Ma * set elr to NULL here since it has been inserted to 303746e4690bSTao Ma * the request_list and the removal and free of it is 303846e4690bSTao Ma * handled by ext4_clear_request_list from now on. 303946e4690bSTao Ma */ 304046e4690bSTao Ma elr = NULL; 3041bfff6873SLukas Czerner 3042bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3043bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3044bfff6873SLukas Czerner if (ret) 3045bfff6873SLukas Czerner goto out; 3046bfff6873SLukas Czerner } 3047bfff6873SLukas Czerner out: 3048bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3049beed5ecbSNicolas Kaiser if (ret) 3050bfff6873SLukas Czerner kfree(elr); 3051bfff6873SLukas Czerner return ret; 3052bfff6873SLukas Czerner } 3053bfff6873SLukas Czerner 3054bfff6873SLukas Czerner /* 3055bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3056bfff6873SLukas Czerner * module unload. 3057bfff6873SLukas Czerner */ 3058bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3059bfff6873SLukas Czerner { 3060bfff6873SLukas Czerner /* 3061bfff6873SLukas Czerner * If thread exited earlier 3062bfff6873SLukas Czerner * there's nothing to be done. 3063bfff6873SLukas Czerner */ 30648f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3065bfff6873SLukas Czerner return; 3066bfff6873SLukas Czerner 30678f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3068bfff6873SLukas Czerner } 3069bfff6873SLukas Czerner 307025ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 307125ed6e8aSDarrick J. Wong { 307225ed6e8aSDarrick J. Wong int ret = 1; 307325ed6e8aSDarrick J. Wong int compat, incompat; 307425ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 307525ed6e8aSDarrick J. Wong 307625ed6e8aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 307725ed6e8aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 307825ed6e8aSDarrick J. Wong /* journal checksum v2 */ 307925ed6e8aSDarrick J. Wong compat = 0; 308025ed6e8aSDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V2; 308125ed6e8aSDarrick J. Wong } else { 308225ed6e8aSDarrick J. Wong /* journal checksum v1 */ 308325ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 308425ed6e8aSDarrick J. Wong incompat = 0; 308525ed6e8aSDarrick J. Wong } 308625ed6e8aSDarrick J. Wong 308725ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 308825ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 308925ed6e8aSDarrick J. Wong compat, 0, 309025ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 309125ed6e8aSDarrick J. Wong incompat); 309225ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 309325ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 309425ed6e8aSDarrick J. Wong compat, 0, 309525ed6e8aSDarrick J. Wong incompat); 309625ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 309725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 309825ed6e8aSDarrick J. Wong } else { 309925ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 310025ed6e8aSDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 310125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 310225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 310325ed6e8aSDarrick J. Wong } 310425ed6e8aSDarrick J. Wong 310525ed6e8aSDarrick J. Wong return ret; 310625ed6e8aSDarrick J. Wong } 310725ed6e8aSDarrick J. Wong 3108952fc18eSTheodore Ts'o /* 3109952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3110952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3111952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3112952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3113952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3114952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3115952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3116952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3117952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3118952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3119952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3120952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3121952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3122952fc18eSTheodore Ts'o */ 3123952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3124952fc18eSTheodore Ts'o char *buf) 3125952fc18eSTheodore Ts'o { 3126952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3127952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3128952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3129952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3130952fc18eSTheodore Ts'o int s, j, count = 0; 3131952fc18eSTheodore Ts'o 31320548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 31330548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 31340548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 31350548bbb8STheodore Ts'o 3136952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3137952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3138952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3139952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3140952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3141952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3142952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3143952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3144952fc18eSTheodore Ts'o count++; 3145952fc18eSTheodore Ts'o } 3146952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3147952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3148952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3149952fc18eSTheodore Ts'o count++; 3150952fc18eSTheodore Ts'o } 3151952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3152952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3153952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3154952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3155952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3156952fc18eSTheodore Ts'o count++; 3157952fc18eSTheodore Ts'o } 3158952fc18eSTheodore Ts'o if (i != grp) 3159952fc18eSTheodore Ts'o continue; 3160952fc18eSTheodore Ts'o s = 0; 3161952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3162952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3163952fc18eSTheodore Ts'o count++; 3164952fc18eSTheodore Ts'o } 3165952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3166952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3167952fc18eSTheodore Ts'o count++; 3168952fc18eSTheodore Ts'o } 3169952fc18eSTheodore Ts'o } 3170952fc18eSTheodore Ts'o if (!count) 3171952fc18eSTheodore Ts'o return 0; 3172952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3173952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3174952fc18eSTheodore Ts'o } 3175952fc18eSTheodore Ts'o 3176952fc18eSTheodore Ts'o /* 3177952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3178952fc18eSTheodore Ts'o */ 3179952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3180952fc18eSTheodore Ts'o { 3181952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3182952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3183952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3184952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3185952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3186952fc18eSTheodore Ts'o 3187952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3188952fc18eSTheodore Ts'o if (!buf) 3189952fc18eSTheodore Ts'o return -ENOMEM; 3190952fc18eSTheodore Ts'o 3191952fc18eSTheodore Ts'o /* 3192952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3193952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3194952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3195952fc18eSTheodore Ts'o */ 3196952fc18eSTheodore Ts'o 3197952fc18eSTheodore Ts'o /* 3198952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3199952fc18eSTheodore Ts'o */ 3200952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3201952fc18eSTheodore Ts'o 3202952fc18eSTheodore Ts'o /* 3203952fc18eSTheodore Ts'o * Add the overhead found in each block group 3204952fc18eSTheodore Ts'o */ 3205952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3206952fc18eSTheodore Ts'o int blks; 3207952fc18eSTheodore Ts'o 3208952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3209952fc18eSTheodore Ts'o overhead += blks; 3210952fc18eSTheodore Ts'o if (blks) 3211952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3212952fc18eSTheodore Ts'o cond_resched(); 3213952fc18eSTheodore Ts'o } 3214952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3215952fc18eSTheodore Ts'o smp_wmb(); 3216952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3217952fc18eSTheodore Ts'o return 0; 3218952fc18eSTheodore Ts'o } 3219952fc18eSTheodore Ts'o 3220617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3221ac27a0ecSDave Kleikamp { 3222d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3223ac27a0ecSDave Kleikamp struct buffer_head *bh; 3224617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3225617ba13bSMingming Cao struct ext4_sb_info *sbi; 3226617ba13bSMingming Cao ext4_fsblk_t block; 3227617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 322870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3229ac27a0ecSDave Kleikamp unsigned long offset = 0; 3230ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3231ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3232ac27a0ecSDave Kleikamp struct inode *root; 32339f6200bbSTheodore Ts'o char *cp; 32340390131bSFrank Mayhar const char *descr; 3235dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3236281b5995STheodore Ts'o int blocksize, clustersize; 32374ec11028STheodore Ts'o unsigned int db_count; 32384ec11028STheodore Ts'o unsigned int i; 3239281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3240bd81d8eeSLaurent Vivier __u64 blocks_count; 3241833f4077SPeter Zijlstra int err; 3242b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3243bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3244ac27a0ecSDave Kleikamp 3245ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3246ac27a0ecSDave Kleikamp if (!sbi) 3247dcc7dae3SCyrill Gorcunov goto out_free_orig; 3248705895b6SPekka Enberg 3249705895b6SPekka Enberg sbi->s_blockgroup_lock = 3250705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3251705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3252705895b6SPekka Enberg kfree(sbi); 3253dcc7dae3SCyrill Gorcunov goto out_free_orig; 3254705895b6SPekka Enberg } 3255ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 32562c0544b2STheodore Ts'o sbi->s_sb = sb; 3257ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 325808cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, EXT4_DEF_RESUID); 325908cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, EXT4_DEF_RESGID); 3260240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3261d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3262f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3263f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3264f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3265ac27a0ecSDave Kleikamp 32669f6200bbSTheodore Ts'o /* Cleanup superblock name */ 32679f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 32689f6200bbSTheodore Ts'o *cp = '!'; 32699f6200bbSTheodore Ts'o 3270dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3271617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3272ac27a0ecSDave Kleikamp if (!blocksize) { 3273b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3274ac27a0ecSDave Kleikamp goto out_fail; 3275ac27a0ecSDave Kleikamp } 3276ac27a0ecSDave Kleikamp 3277ac27a0ecSDave Kleikamp /* 3278617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3279ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3280ac27a0ecSDave Kleikamp */ 3281617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 328270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 328370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3284ac27a0ecSDave Kleikamp } else { 328570bbb3e0SAndrew Morton logical_sb_block = sb_block; 3286ac27a0ecSDave Kleikamp } 3287ac27a0ecSDave Kleikamp 328870bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3289b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3290ac27a0ecSDave Kleikamp goto out_fail; 3291ac27a0ecSDave Kleikamp } 3292ac27a0ecSDave Kleikamp /* 3293ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3294617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3295ac27a0ecSDave Kleikamp */ 32962716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3297ac27a0ecSDave Kleikamp sbi->s_es = es; 3298ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3299617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3300617ba13bSMingming Cao goto cantfind_ext4; 3301afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3302ac27a0ecSDave Kleikamp 3303feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3304feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3305feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3306feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3307feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3308feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3309feb0ab32SDarrick J. Wong 3310d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3311d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3312d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3313d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3314d25425f8SDarrick J. Wong silent = 1; 3315d25425f8SDarrick J. Wong goto cantfind_ext4; 3316d25425f8SDarrick J. Wong } 3317d25425f8SDarrick J. Wong 33180441984aSDarrick J. Wong /* Load the checksum driver */ 33190441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 33200441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 33210441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 33220441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 33230441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 33240441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 33250441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 33260441984aSDarrick J. Wong goto failed_mount; 33270441984aSDarrick J. Wong } 33280441984aSDarrick J. Wong } 33290441984aSDarrick J. Wong 3330a9c47317SDarrick J. Wong /* Check superblock checksum */ 3331a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3332a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3333a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3334a9c47317SDarrick J. Wong silent = 1; 3335a9c47317SDarrick J. Wong goto cantfind_ext4; 3336a9c47317SDarrick J. Wong } 3337a9c47317SDarrick J. Wong 3338a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3339a9c47317SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3340a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 3341a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3342a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3343a9c47317SDarrick J. Wong 3344ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3345ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3346fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3347617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3348fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 334987f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3350fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3351617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3352fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3353ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 335403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3355fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 33562e7842b8SHugh Dickins #endif 335703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3358fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 33592e7842b8SHugh Dickins #endif 33606fd7a467STheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 3361617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3362fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3363617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3364fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3365617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3366fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3367ac27a0ecSDave Kleikamp 3368617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3369fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3370bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3371fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3372bb4f397aSAneesh Kumar K.V else 3373fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 33748b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3375fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 33768b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3377fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3378ac27a0ecSDave Kleikamp 337908cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 338008cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 338130773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 338230773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 338330773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3384ac27a0ecSDave Kleikamp 33858b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3386fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3387ac27a0ecSDave Kleikamp 33881e2462f9SMingming Cao /* 3389dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3390dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3391dd919b98SAneesh Kumar K.V */ 33928b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 33938b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3394fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3395dd919b98SAneesh Kumar K.V 339651ce6511SLukas Czerner /* 339751ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 339851ce6511SLukas Czerner * no mount option specified. 339951ce6511SLukas Czerner */ 340051ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 340151ce6511SLukas Czerner 34028b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3403661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 34048b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 34058b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 34068b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 34078b67f04aSTheodore Ts'o } 34085a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3409b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3410661aa520SEric Sandeen &journal_ioprio, 0)) 3411ac27a0ecSDave Kleikamp goto failed_mount; 3412ac27a0ecSDave Kleikamp 341356889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 341456889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 341556889787STheodore Ts'o "with data=journal disables delayed " 341656889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 341756889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 341856889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 341956889787STheodore Ts'o "both data=journal and delalloc"); 342056889787STheodore Ts'o goto failed_mount; 342156889787STheodore Ts'o } 342256889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 342356889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 342456889787STheodore Ts'o "both data=journal and delalloc"); 342556889787STheodore Ts'o goto failed_mount; 342656889787STheodore Ts'o } 342756889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 342856889787STheodore Ts'o clear_opt(sb, DELALLOC); 342956889787STheodore Ts'o } 343056889787STheodore Ts'o 343156889787STheodore Ts'o blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 343256889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 343356889787STheodore Ts'o if (blocksize < PAGE_SIZE) { 343456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 343556889787STheodore Ts'o "dioread_nolock if block size != PAGE_SIZE"); 343656889787STheodore Ts'o goto failed_mount; 343756889787STheodore Ts'o } 343856889787STheodore Ts'o } 343956889787STheodore Ts'o 3440ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3441482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3442ac27a0ecSDave Kleikamp 3443617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3444617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3445617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3446617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3447b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3448b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3449b31e1552SEric Sandeen "running e2fsck is recommended"); 3450469108ffSTheodore Tso 34512035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 34522035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 34532035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 34542035e776STheodore Ts'o "using the ext4 subsystem"); 34552035e776STheodore Ts'o else { 34562035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 34572035e776STheodore Ts'o "to feature incompatibilities"); 34582035e776STheodore Ts'o goto failed_mount; 34592035e776STheodore Ts'o } 34602035e776STheodore Ts'o } 34612035e776STheodore Ts'o 34622035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 34632035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 34642035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 34652035e776STheodore Ts'o "using the ext4 subsystem"); 34662035e776STheodore Ts'o else { 34672035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 34682035e776STheodore Ts'o "to feature incompatibilities"); 34692035e776STheodore Ts'o goto failed_mount; 34702035e776STheodore Ts'o } 34712035e776STheodore Ts'o } 34722035e776STheodore Ts'o 3473469108ffSTheodore Tso /* 3474ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3475ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3476ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3477ac27a0ecSDave Kleikamp */ 3478a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3479ac27a0ecSDave Kleikamp goto failed_mount; 3480a13fb1a4SEric Sandeen 3481617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3482617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3483b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3484b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3485ac27a0ecSDave Kleikamp goto failed_mount; 3486ac27a0ecSDave Kleikamp } 3487ac27a0ecSDave Kleikamp 3488ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3489ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3490ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3491b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3492ce40733cSAneesh Kumar K.V blocksize); 3493ac27a0ecSDave Kleikamp goto failed_mount; 3494ac27a0ecSDave Kleikamp } 3495ac27a0ecSDave Kleikamp 3496ac27a0ecSDave Kleikamp brelse(bh); 349770bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 349870bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 349970bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3500ac27a0ecSDave Kleikamp if (!bh) { 3501b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3502b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3503ac27a0ecSDave Kleikamp goto failed_mount; 3504ac27a0ecSDave Kleikamp } 35052716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3506ac27a0ecSDave Kleikamp sbi->s_es = es; 3507617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3508b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3509b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3510ac27a0ecSDave Kleikamp goto failed_mount; 3511ac27a0ecSDave Kleikamp } 3512ac27a0ecSDave Kleikamp } 3513ac27a0ecSDave Kleikamp 3514a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3515a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3516f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3517f287a1a5STheodore Ts'o has_huge_files); 3518f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3519ac27a0ecSDave Kleikamp 3520617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3521617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3522617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3523ac27a0ecSDave Kleikamp } else { 3524ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3525ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3526617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 35271330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3528ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3529b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3530b31e1552SEric Sandeen "unsupported inode size: %d", 3531ac27a0ecSDave Kleikamp sbi->s_inode_size); 3532ac27a0ecSDave Kleikamp goto failed_mount; 3533ac27a0ecSDave Kleikamp } 3534ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3535ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3536ac27a0ecSDave Kleikamp } 35370b8e58a1SAndreas Dilger 35380d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 35390d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 35408fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 35410d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3542d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3543b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3544b31e1552SEric Sandeen "unsupported descriptor size %lu", 35450d1ee42fSAlexandre Ratchov sbi->s_desc_size); 35460d1ee42fSAlexandre Ratchov goto failed_mount; 35470d1ee42fSAlexandre Ratchov } 35480d1ee42fSAlexandre Ratchov } else 35490d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 35500b8e58a1SAndreas Dilger 3551ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3552ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3553b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3554617ba13bSMingming Cao goto cantfind_ext4; 35550b8e58a1SAndreas Dilger 3556617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3557ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3558617ba13bSMingming Cao goto cantfind_ext4; 3559ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3560ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 35610d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3562ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3563ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3564e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3565e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 35660b8e58a1SAndreas Dilger 3567ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3568ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3569ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3570f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3571f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3572f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3573f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3574f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3575f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3576f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3577f99b2589STheodore Ts'o #else 3578f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3579f99b2589STheodore Ts'o #endif 3580f99b2589STheodore Ts'o } 3581ac27a0ecSDave Kleikamp 3582281b5995STheodore Ts'o /* Handle clustersize */ 3583281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3584281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3585281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3586281b5995STheodore Ts'o if (has_bigalloc) { 3587281b5995STheodore Ts'o if (clustersize < blocksize) { 3588281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3589281b5995STheodore Ts'o "cluster size (%d) smaller than " 3590281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3591281b5995STheodore Ts'o goto failed_mount; 3592281b5995STheodore Ts'o } 3593281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3594281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3595281b5995STheodore Ts'o sbi->s_clusters_per_group = 3596281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3597281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3598281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3599281b5995STheodore Ts'o "#clusters per group too big: %lu", 3600281b5995STheodore Ts'o sbi->s_clusters_per_group); 3601281b5995STheodore Ts'o goto failed_mount; 3602281b5995STheodore Ts'o } 3603281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3604281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3605281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3606281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3607281b5995STheodore Ts'o sbi->s_blocks_per_group, 3608281b5995STheodore Ts'o sbi->s_clusters_per_group); 3609281b5995STheodore Ts'o goto failed_mount; 3610281b5995STheodore Ts'o } 3611281b5995STheodore Ts'o } else { 3612281b5995STheodore Ts'o if (clustersize != blocksize) { 3613281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3614281b5995STheodore Ts'o "block size (%d)", clustersize, 3615281b5995STheodore Ts'o blocksize); 3616281b5995STheodore Ts'o clustersize = blocksize; 3617281b5995STheodore Ts'o } 3618ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3619b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3620b31e1552SEric Sandeen "#blocks per group too big: %lu", 3621ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3622ac27a0ecSDave Kleikamp goto failed_mount; 3623ac27a0ecSDave Kleikamp } 3624281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3625281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3626281b5995STheodore Ts'o } 3627281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3628281b5995STheodore Ts'o 3629ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3630b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3631b31e1552SEric Sandeen "#inodes per group too big: %lu", 3632ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3633ac27a0ecSDave Kleikamp goto failed_mount; 3634ac27a0ecSDave Kleikamp } 3635ac27a0ecSDave Kleikamp 3636bf43d84bSEric Sandeen /* 3637bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3638bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3639bf43d84bSEric Sandeen */ 36405a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 364130ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 36425a9ae68aSDarrick J. Wong if (err) { 3643b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3644bf43d84bSEric Sandeen " too large to mount safely on this system"); 3645ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 364690c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 36475a9ae68aSDarrick J. Wong ret = err; 3648ac27a0ecSDave Kleikamp goto failed_mount; 3649ac27a0ecSDave Kleikamp } 3650ac27a0ecSDave Kleikamp 3651617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3652617ba13bSMingming Cao goto cantfind_ext4; 3653e7c95593SEric Sandeen 36540f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 36550f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 36560f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3657b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3658b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 36590f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 36600f2ddca6SFrom: Thiemo Nagel goto failed_mount; 36610f2ddca6SFrom: Thiemo Nagel } 36620f2ddca6SFrom: Thiemo Nagel 36634ec11028STheodore Ts'o /* 36644ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 36654ec11028STheodore Ts'o * of the filesystem. 36664ec11028STheodore Ts'o */ 36674ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3668b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3669b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3670e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 36714ec11028STheodore Ts'o ext4_blocks_count(es)); 3672e7c95593SEric Sandeen goto failed_mount; 3673e7c95593SEric Sandeen } 3674bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3675bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3676bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3677bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 36784ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3679b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 36804ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3681b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 36824ec11028STheodore Ts'o ext4_blocks_count(es), 36834ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 36844ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 36854ec11028STheodore Ts'o goto failed_mount; 36864ec11028STheodore Ts'o } 3687bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3688fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3689fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3690617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3691617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3692f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3693f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3694ac27a0ecSDave Kleikamp GFP_KERNEL); 3695ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3696b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 36972cde417dSTheodore Ts'o ret = -ENOMEM; 3698ac27a0ecSDave Kleikamp goto failed_mount; 3699ac27a0ecSDave Kleikamp } 3700ac27a0ecSDave Kleikamp 37019f6200bbSTheodore Ts'o if (ext4_proc_root) 37029f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3703240799cdSTheodore Ts'o 370466acdcf4STheodore Ts'o if (sbi->s_proc) 370566acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 370666acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 370766acdcf4STheodore Ts'o 3708705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3709ac27a0ecSDave Kleikamp 3710ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 371170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3712ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3713ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3714b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3715b31e1552SEric Sandeen "can't read group descriptor %d", i); 3716ac27a0ecSDave Kleikamp db_count = i; 3717ac27a0ecSDave Kleikamp goto failed_mount2; 3718ac27a0ecSDave Kleikamp } 3719ac27a0ecSDave Kleikamp } 3720bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3721b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3722ac27a0ecSDave Kleikamp goto failed_mount2; 3723ac27a0ecSDave Kleikamp } 3724772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3725772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3726b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3727b31e1552SEric Sandeen "unable to initialize " 3728b31e1552SEric Sandeen "flex_bg meta info!"); 3729772cb7c8SJose R. Santos goto failed_mount2; 3730772cb7c8SJose R. Santos } 3731772cb7c8SJose R. Santos 3732ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3733ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3734ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3735ac27a0ecSDave Kleikamp 373604496411STao Ma init_timer(&sbi->s_err_report); 373704496411STao Ma sbi->s_err_report.function = print_daily_error_info; 373804496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 373904496411STao Ma 374057042651STheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, 37415dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3742ce7e010aSTheodore Ts'o if (!err) { 3743ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3744ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3745ce7e010aSTheodore Ts'o } 3746ce7e010aSTheodore Ts'o if (!err) { 3747ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3748ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3749ce7e010aSTheodore Ts'o } 3750ce7e010aSTheodore Ts'o if (!err) { 375157042651STheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 3752ce7e010aSTheodore Ts'o } 3753ce7e010aSTheodore Ts'o if (err) { 3754ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 37552cde417dSTheodore Ts'o ret = err; 3756ce7e010aSTheodore Ts'o goto failed_mount3; 3757ce7e010aSTheodore Ts'o } 3758ce7e010aSTheodore Ts'o 3759c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 376055138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3761*67a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3762c9de560dSAlex Tomas 3763ac27a0ecSDave Kleikamp /* 3764ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3765ac27a0ecSDave Kleikamp */ 37669ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 37679ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3768617ba13bSMingming Cao sb->s_op = &ext4_sops; 37699ca92389STheodore Ts'o else 37709ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3771617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3772617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3773ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3774617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3775617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 37767c319d32SAditya Kali 37777c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 37787c319d32SAditya Kali /* Use qctl operations for hidden quota files. */ 37797c319d32SAditya Kali sb->s_qcop = &ext4_qctl_sysfile_operations; 37807c319d32SAditya Kali } 3781ac27a0ecSDave Kleikamp #endif 3782f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3783f2fa2ffcSAneesh Kumar K.V 3784ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 37853b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 37868f82f840SYongqiang Yang sbi->s_resize_flags = 0; 3787ac27a0ecSDave Kleikamp 3788ac27a0ecSDave Kleikamp sb->s_root = NULL; 3789ac27a0ecSDave Kleikamp 3790ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3791617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3792617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3793ac27a0ecSDave Kleikamp 3794c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3795c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3796c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3797c5e06d10SJohann Lombardi goto failed_mount3; 3798c5e06d10SJohann Lombardi 3799ac27a0ecSDave Kleikamp /* 3800ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3801ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3802ac27a0ecSDave Kleikamp */ 3803ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3804617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3805617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3806ac27a0ecSDave Kleikamp goto failed_mount3; 38070390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 38080390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3809b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3810b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3811744692dcSJiaying Zhang goto failed_mount_wq; 3812ac27a0ecSDave Kleikamp } else { 3813fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 38140390131bSFrank Mayhar sbi->s_journal = NULL; 38150390131bSFrank Mayhar needs_recovery = 0; 38160390131bSFrank Mayhar goto no_journal; 3817ac27a0ecSDave Kleikamp } 3818ac27a0ecSDave Kleikamp 3819f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3820eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3821eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3822b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3823744692dcSJiaying Zhang goto failed_mount_wq; 3824eb40a09cSJose R. Santos } 3825eb40a09cSJose R. Santos 382625ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 382725ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 382825ed6e8aSDarrick J. Wong "feature set"); 382925ed6e8aSDarrick J. Wong goto failed_mount_wq; 3830d4da6c9cSLinus Torvalds } 3831818d276cSGirish Shilamkar 3832ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3833ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3834ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3835ac27a0ecSDave Kleikamp case 0: 3836ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 383763f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 383863f57933SAndrew Morton * cope, else JOURNAL_DATA 383963f57933SAndrew Morton */ 3840dab291afSMingming Cao if (jbd2_journal_check_available_features 3841dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3842fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3843ac27a0ecSDave Kleikamp else 3844fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3845ac27a0ecSDave Kleikamp break; 3846ac27a0ecSDave Kleikamp 3847617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3848617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3849dab291afSMingming Cao if (!jbd2_journal_check_available_features 3850dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3851b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3852b31e1552SEric Sandeen "requested data journaling mode"); 3853744692dcSJiaying Zhang goto failed_mount_wq; 3854ac27a0ecSDave Kleikamp } 3855ac27a0ecSDave Kleikamp default: 3856ac27a0ecSDave Kleikamp break; 3857ac27a0ecSDave Kleikamp } 3858b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3859ac27a0ecSDave Kleikamp 386018aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 386118aadd47SBobi Jam 3862ce7e010aSTheodore Ts'o /* 3863ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3864ce7e010aSTheodore Ts'o * need to update the global counters. 3865ce7e010aSTheodore Ts'o */ 386657042651STheodore Ts'o percpu_counter_set(&sbi->s_freeclusters_counter, 38675dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3868ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 386984061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3870ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 387184061e07SDmitry Monakhov ext4_count_dirs(sb)); 387257042651STheodore Ts'o percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); 3873206f7ab4SChristoph Hellwig 3874ce7e010aSTheodore Ts'o no_journal: 3875fd89d5f2STejun Heo /* 3876952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 3877952fc18eSTheodore Ts'o * superblock if present. 3878952fc18eSTheodore Ts'o */ 3879952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 3880952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 3881952fc18eSTheodore Ts'o else { 3882952fc18eSTheodore Ts'o ret = ext4_calculate_overhead(sb); 3883952fc18eSTheodore Ts'o if (ret) 3884952fc18eSTheodore Ts'o goto failed_mount_wq; 3885952fc18eSTheodore Ts'o } 3886952fc18eSTheodore Ts'o 3887952fc18eSTheodore Ts'o /* 3888fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3889fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3890fd89d5f2STejun Heo */ 3891fd89d5f2STejun Heo EXT4_SB(sb)->dio_unwritten_wq = 3892ae005cbeSLinus Torvalds alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 38934c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 38944c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 38954c0425ffSMingming Cao goto failed_mount_wq; 38964c0425ffSMingming Cao } 38974c0425ffSMingming Cao 3898ac27a0ecSDave Kleikamp /* 3899dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3900ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3901ac27a0ecSDave Kleikamp */ 3902ac27a0ecSDave Kleikamp 39031d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 39041d1fe1eeSDavid Howells if (IS_ERR(root)) { 3905b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 39061d1fe1eeSDavid Howells ret = PTR_ERR(root); 390732a9bb57SManish Katiyar root = NULL; 3908ac27a0ecSDave Kleikamp goto failed_mount4; 3909ac27a0ecSDave Kleikamp } 3910ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3911b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 391294bf608aSAl Viro iput(root); 3913ac27a0ecSDave Kleikamp goto failed_mount4; 3914ac27a0ecSDave Kleikamp } 391548fde701SAl Viro sb->s_root = d_make_root(root); 39161d1fe1eeSDavid Howells if (!sb->s_root) { 3917b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 39181d1fe1eeSDavid Howells ret = -ENOMEM; 39191d1fe1eeSDavid Howells goto failed_mount4; 39201d1fe1eeSDavid Howells } 3921ac27a0ecSDave Kleikamp 39227e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 39237e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 3924ef7f3835SKalpak Shah 3925ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3926ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3927ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3928ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3929ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3930ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3931ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3932ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3933ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3934ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3935ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3936ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3937ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3938ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3939ef7f3835SKalpak Shah } 3940ef7f3835SKalpak Shah } 3941ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3942ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3943ef7f3835SKalpak Shah sbi->s_inode_size) { 3944ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3945ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3946b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3947b31e1552SEric Sandeen "available"); 3948ef7f3835SKalpak Shah } 3949ef7f3835SKalpak Shah 39506fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 39516fd058f7STheodore Ts'o if (err) { 3952b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3953fbe845ddSCurt Wohlgemuth "zone (%d)", err); 395494bf608aSAl Viro goto failed_mount4a; 39556fd058f7STheodore Ts'o } 39566fd058f7STheodore Ts'o 3957c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 39589d99012fSAkira Fujita err = ext4_mb_init(sb); 3959c2774d84SAneesh Kumar K.V if (err) { 3960421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3961c2774d84SAneesh Kumar K.V err); 3962dcf2d804STao Ma goto failed_mount5; 3963c2774d84SAneesh Kumar K.V } 3964c2774d84SAneesh Kumar K.V 3965bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3966bfff6873SLukas Czerner if (err) 3967dcf2d804STao Ma goto failed_mount6; 3968bfff6873SLukas Czerner 39693197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 39703197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 39713197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 39723197ebdbSTheodore Ts'o "%s", sb->s_id); 3973dcf2d804STao Ma if (err) 3974dcf2d804STao Ma goto failed_mount7; 39753197ebdbSTheodore Ts'o 3976617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3977617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3978617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 39790390131bSFrank Mayhar if (needs_recovery) { 3980b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3981617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 39820390131bSFrank Mayhar } 39830390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 39840390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 39850390131bSFrank Mayhar descr = " journalled data mode"; 39860390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 39870390131bSFrank Mayhar descr = " ordered data mode"; 39880390131bSFrank Mayhar else 39890390131bSFrank Mayhar descr = " writeback data mode"; 39900390131bSFrank Mayhar } else 39910390131bSFrank Mayhar descr = "out journal"; 39920390131bSFrank Mayhar 39937c319d32SAditya Kali #ifdef CONFIG_QUOTA 39947c319d32SAditya Kali /* Enable quota usage during mount. */ 39957c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 39967c319d32SAditya Kali !(sb->s_flags & MS_RDONLY)) { 39977c319d32SAditya Kali ret = ext4_enable_quotas(sb); 39987c319d32SAditya Kali if (ret) 39997c319d32SAditya Kali goto failed_mount7; 40007c319d32SAditya Kali } 40017c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 40027c319d32SAditya Kali 4003d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 40048b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 40058b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4006ac27a0ecSDave Kleikamp 400766e61a9eSTheodore Ts'o if (es->s_error_count) 400866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4009ac27a0ecSDave Kleikamp 4010d4c402d9SCurt Wohlgemuth kfree(orig_data); 4011ac27a0ecSDave Kleikamp return 0; 4012ac27a0ecSDave Kleikamp 4013617ba13bSMingming Cao cantfind_ext4: 4014ac27a0ecSDave Kleikamp if (!silent) 4015b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4016ac27a0ecSDave Kleikamp goto failed_mount; 4017ac27a0ecSDave Kleikamp 4018dcf2d804STao Ma failed_mount7: 4019dcf2d804STao Ma ext4_unregister_li_request(sb); 4020dcf2d804STao Ma failed_mount6: 4021dcf2d804STao Ma ext4_mb_release(sb); 402294bf608aSAl Viro failed_mount5: 402394bf608aSAl Viro ext4_ext_release(sb); 4024dcf2d804STao Ma ext4_release_system_zone(sb); 402594bf608aSAl Viro failed_mount4a: 402694bf608aSAl Viro dput(sb->s_root); 402732a9bb57SManish Katiyar sb->s_root = NULL; 402894bf608aSAl Viro failed_mount4: 4029b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 40304c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 40314c0425ffSMingming Cao failed_mount_wq: 40320390131bSFrank Mayhar if (sbi->s_journal) { 4033dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 403447b4a50bSJan Kara sbi->s_journal = NULL; 40350390131bSFrank Mayhar } 4036ac27a0ecSDave Kleikamp failed_mount3: 403704496411STao Ma del_timer(&sbi->s_err_report); 40389933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 40399933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 404057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4041ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4042ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 404357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 4044c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4045c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4046ac27a0ecSDave Kleikamp failed_mount2: 4047ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4048ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4049f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4050ac27a0ecSDave Kleikamp failed_mount: 40510441984aSDarrick J. Wong if (sbi->s_chksum_driver) 40520441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4053240799cdSTheodore Ts'o if (sbi->s_proc) { 405466acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 40559f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4056240799cdSTheodore Ts'o } 4057ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4058ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4059ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4060ac27a0ecSDave Kleikamp #endif 4061617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4062ac27a0ecSDave Kleikamp brelse(bh); 4063ac27a0ecSDave Kleikamp out_fail: 4064ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4065f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4066ac27a0ecSDave Kleikamp kfree(sbi); 4067dcc7dae3SCyrill Gorcunov out_free_orig: 4068d4c402d9SCurt Wohlgemuth kfree(orig_data); 40691d1fe1eeSDavid Howells return ret; 4070ac27a0ecSDave Kleikamp } 4071ac27a0ecSDave Kleikamp 4072ac27a0ecSDave Kleikamp /* 4073ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4074ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4075ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4076ac27a0ecSDave Kleikamp */ 4077617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4078ac27a0ecSDave Kleikamp { 4079617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4080ac27a0ecSDave Kleikamp 4081ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 408230773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 408330773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4084ac27a0ecSDave Kleikamp 4085a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4086ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4087dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4088ac27a0ecSDave Kleikamp else 4089dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 40905bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 40915bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 40925bf5683aSHidehiro Kawai else 40935bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4094a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4095ac27a0ecSDave Kleikamp } 4096ac27a0ecSDave Kleikamp 4097617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4098ac27a0ecSDave Kleikamp unsigned int journal_inum) 4099ac27a0ecSDave Kleikamp { 4100ac27a0ecSDave Kleikamp struct inode *journal_inode; 4101ac27a0ecSDave Kleikamp journal_t *journal; 4102ac27a0ecSDave Kleikamp 41030390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41040390131bSFrank Mayhar 4105ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4106ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4107ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4108ac27a0ecSDave Kleikamp 41091d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 41101d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4111b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4112ac27a0ecSDave Kleikamp return NULL; 4113ac27a0ecSDave Kleikamp } 4114ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4115ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4116ac27a0ecSDave Kleikamp iput(journal_inode); 4117b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4118ac27a0ecSDave Kleikamp return NULL; 4119ac27a0ecSDave Kleikamp } 4120ac27a0ecSDave Kleikamp 4121e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4122ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 41231d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4124b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4125ac27a0ecSDave Kleikamp iput(journal_inode); 4126ac27a0ecSDave Kleikamp return NULL; 4127ac27a0ecSDave Kleikamp } 4128ac27a0ecSDave Kleikamp 4129dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4130ac27a0ecSDave Kleikamp if (!journal) { 4131b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4132ac27a0ecSDave Kleikamp iput(journal_inode); 4133ac27a0ecSDave Kleikamp return NULL; 4134ac27a0ecSDave Kleikamp } 4135ac27a0ecSDave Kleikamp journal->j_private = sb; 4136617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4137ac27a0ecSDave Kleikamp return journal; 4138ac27a0ecSDave Kleikamp } 4139ac27a0ecSDave Kleikamp 4140617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4141ac27a0ecSDave Kleikamp dev_t j_dev) 4142ac27a0ecSDave Kleikamp { 4143ac27a0ecSDave Kleikamp struct buffer_head *bh; 4144ac27a0ecSDave Kleikamp journal_t *journal; 4145617ba13bSMingming Cao ext4_fsblk_t start; 4146617ba13bSMingming Cao ext4_fsblk_t len; 4147ac27a0ecSDave Kleikamp int hblock, blocksize; 4148617ba13bSMingming Cao ext4_fsblk_t sb_block; 4149ac27a0ecSDave Kleikamp unsigned long offset; 4150617ba13bSMingming Cao struct ext4_super_block *es; 4151ac27a0ecSDave Kleikamp struct block_device *bdev; 4152ac27a0ecSDave Kleikamp 41530390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41540390131bSFrank Mayhar 4155b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4156ac27a0ecSDave Kleikamp if (bdev == NULL) 4157ac27a0ecSDave Kleikamp return NULL; 4158ac27a0ecSDave Kleikamp 4159ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4160e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4161ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4162b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4163b31e1552SEric Sandeen "blocksize too small for journal device"); 4164ac27a0ecSDave Kleikamp goto out_bdev; 4165ac27a0ecSDave Kleikamp } 4166ac27a0ecSDave Kleikamp 4167617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4168617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4169ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4170ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4171b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4172b31e1552SEric Sandeen "external journal"); 4173ac27a0ecSDave Kleikamp goto out_bdev; 4174ac27a0ecSDave Kleikamp } 4175ac27a0ecSDave Kleikamp 41762716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4177617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4178ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4179617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4180b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4181b31e1552SEric Sandeen "bad superblock"); 4182ac27a0ecSDave Kleikamp brelse(bh); 4183ac27a0ecSDave Kleikamp goto out_bdev; 4184ac27a0ecSDave Kleikamp } 4185ac27a0ecSDave Kleikamp 4186617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4187b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4188ac27a0ecSDave Kleikamp brelse(bh); 4189ac27a0ecSDave Kleikamp goto out_bdev; 4190ac27a0ecSDave Kleikamp } 4191ac27a0ecSDave Kleikamp 4192bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4193ac27a0ecSDave Kleikamp start = sb_block + 1; 4194ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4195ac27a0ecSDave Kleikamp 4196dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4197ac27a0ecSDave Kleikamp start, len, blocksize); 4198ac27a0ecSDave Kleikamp if (!journal) { 4199b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4200ac27a0ecSDave Kleikamp goto out_bdev; 4201ac27a0ecSDave Kleikamp } 4202ac27a0ecSDave Kleikamp journal->j_private = sb; 4203ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 4204ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4205ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4206b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4207ac27a0ecSDave Kleikamp goto out_journal; 4208ac27a0ecSDave Kleikamp } 4209ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4210b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4211b31e1552SEric Sandeen "user (unsupported) - %d", 4212ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4213ac27a0ecSDave Kleikamp goto out_journal; 4214ac27a0ecSDave Kleikamp } 4215617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4216617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4217ac27a0ecSDave Kleikamp return journal; 42180b8e58a1SAndreas Dilger 4219ac27a0ecSDave Kleikamp out_journal: 4220dab291afSMingming Cao jbd2_journal_destroy(journal); 4221ac27a0ecSDave Kleikamp out_bdev: 4222617ba13bSMingming Cao ext4_blkdev_put(bdev); 4223ac27a0ecSDave Kleikamp return NULL; 4224ac27a0ecSDave Kleikamp } 4225ac27a0ecSDave Kleikamp 4226617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4227617ba13bSMingming Cao struct ext4_super_block *es, 4228ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4229ac27a0ecSDave Kleikamp { 4230ac27a0ecSDave Kleikamp journal_t *journal; 4231ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4232ac27a0ecSDave Kleikamp dev_t journal_dev; 4233ac27a0ecSDave Kleikamp int err = 0; 4234ac27a0ecSDave Kleikamp int really_read_only; 4235ac27a0ecSDave Kleikamp 42360390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 42370390131bSFrank Mayhar 4238ac27a0ecSDave Kleikamp if (journal_devnum && 4239ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4240b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4241b31e1552SEric Sandeen "numbers have changed"); 4242ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4243ac27a0ecSDave Kleikamp } else 4244ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4245ac27a0ecSDave Kleikamp 4246ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4247ac27a0ecSDave Kleikamp 4248ac27a0ecSDave Kleikamp /* 4249ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4250ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4251ac27a0ecSDave Kleikamp * can get read-write access to the device. 4252ac27a0ecSDave Kleikamp */ 4253617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4254ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4255b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4256b31e1552SEric Sandeen "required on readonly filesystem"); 4257ac27a0ecSDave Kleikamp if (really_read_only) { 4258b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4259b31e1552SEric Sandeen "unavailable, cannot proceed"); 4260ac27a0ecSDave Kleikamp return -EROFS; 4261ac27a0ecSDave Kleikamp } 4262b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4263b31e1552SEric Sandeen "be enabled during recovery"); 4264ac27a0ecSDave Kleikamp } 4265ac27a0ecSDave Kleikamp } 4266ac27a0ecSDave Kleikamp 4267ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4268b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4269b31e1552SEric Sandeen "and inode journals!"); 4270ac27a0ecSDave Kleikamp return -EINVAL; 4271ac27a0ecSDave Kleikamp } 4272ac27a0ecSDave Kleikamp 4273ac27a0ecSDave Kleikamp if (journal_inum) { 4274617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4275ac27a0ecSDave Kleikamp return -EINVAL; 4276ac27a0ecSDave Kleikamp } else { 4277617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4278ac27a0ecSDave Kleikamp return -EINVAL; 4279ac27a0ecSDave Kleikamp } 4280ac27a0ecSDave Kleikamp 428190576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4282b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 42834776004fSTheodore Ts'o 4284617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4285dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 42861c13d5c0STheodore Ts'o if (!err) { 42871c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 42881c13d5c0STheodore Ts'o if (save) 42891c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 42901c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4291dab291afSMingming Cao err = jbd2_journal_load(journal); 42921c13d5c0STheodore Ts'o if (save) 42931c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 42941c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 42951c13d5c0STheodore Ts'o kfree(save); 42961c13d5c0STheodore Ts'o } 4297ac27a0ecSDave Kleikamp 4298ac27a0ecSDave Kleikamp if (err) { 4299b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4300dab291afSMingming Cao jbd2_journal_destroy(journal); 4301ac27a0ecSDave Kleikamp return err; 4302ac27a0ecSDave Kleikamp } 4303ac27a0ecSDave Kleikamp 4304617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4305617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4306ac27a0ecSDave Kleikamp 4307c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4308ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4309ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4310ac27a0ecSDave Kleikamp 4311ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4312e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4313ac27a0ecSDave Kleikamp } 4314ac27a0ecSDave Kleikamp 4315ac27a0ecSDave Kleikamp return 0; 4316ac27a0ecSDave Kleikamp } 4317ac27a0ecSDave Kleikamp 4318e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4319ac27a0ecSDave Kleikamp { 4320e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4321617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4322c4be0c1dSTakashi Sato int error = 0; 4323ac27a0ecSDave Kleikamp 43247c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4325c4be0c1dSTakashi Sato return error; 4326914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4327914258bfSTheodore Ts'o /* 4328914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4329914258bfSTheodore Ts'o * superblock failed. This could happen because the 4330914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4331914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4332914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4333914258bfSTheodore Ts'o * write and hope for the best. 4334914258bfSTheodore Ts'o */ 4335b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4336b31e1552SEric Sandeen "superblock detected"); 4337914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4338914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4339914258bfSTheodore Ts'o } 434071290b36STheodore Ts'o /* 434171290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 434271290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 434371290b36STheodore Ts'o * write time when we are mounting the root file system 434471290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 434571290b36STheodore Ts'o * for people who are east of GMT and who make their clock 434671290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 434771290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 434871290b36STheodore Ts'o * to complain and force a full file system check. 434971290b36STheodore Ts'o */ 435071290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4351ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4352f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4353afc32f7eSTheodore Ts'o es->s_kbytes_written = 4354afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4355afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4356afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4357f613dfcbSTheodore Ts'o else 4358f613dfcbSTheodore Ts'o es->s_kbytes_written = 4359f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 436057042651STheodore Ts'o ext4_free_blocks_count_set(es, 436157042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 436257042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 43637f93cff9STheodore Ts'o es->s_free_inodes_count = 43647f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 43655d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4366ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 4367a9c47317SDarrick J. Wong ext4_superblock_csum_set(sb, es); 4368ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4369914258bfSTheodore Ts'o if (sync) { 4370c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4371c4be0c1dSTakashi Sato if (error) 4372c4be0c1dSTakashi Sato return error; 4373c4be0c1dSTakashi Sato 4374c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4375c4be0c1dSTakashi Sato if (error) { 4376b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4377b31e1552SEric Sandeen "superblock"); 4378914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4379914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4380914258bfSTheodore Ts'o } 4381914258bfSTheodore Ts'o } 4382c4be0c1dSTakashi Sato return error; 4383ac27a0ecSDave Kleikamp } 4384ac27a0ecSDave Kleikamp 4385ac27a0ecSDave Kleikamp /* 4386ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4387ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4388ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4389ac27a0ecSDave Kleikamp */ 4390617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4391617ba13bSMingming Cao struct ext4_super_block *es) 4392ac27a0ecSDave Kleikamp { 4393617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4394ac27a0ecSDave Kleikamp 43950390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 43960390131bSFrank Mayhar BUG_ON(journal != NULL); 43970390131bSFrank Mayhar return; 43980390131bSFrank Mayhar } 4399dab291afSMingming Cao jbd2_journal_lock_updates(journal); 44007ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 44017ffe1ea8SHidehiro Kawai goto out; 44027ffe1ea8SHidehiro Kawai 4403617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4404ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4405617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4406e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4407ac27a0ecSDave Kleikamp } 44087ffe1ea8SHidehiro Kawai 44097ffe1ea8SHidehiro Kawai out: 4410dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4411ac27a0ecSDave Kleikamp } 4412ac27a0ecSDave Kleikamp 4413ac27a0ecSDave Kleikamp /* 4414ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4415ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4416ac27a0ecSDave Kleikamp * main filesystem now. 4417ac27a0ecSDave Kleikamp */ 4418617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4419617ba13bSMingming Cao struct ext4_super_block *es) 4420ac27a0ecSDave Kleikamp { 4421ac27a0ecSDave Kleikamp journal_t *journal; 4422ac27a0ecSDave Kleikamp int j_errno; 4423ac27a0ecSDave Kleikamp const char *errstr; 4424ac27a0ecSDave Kleikamp 44250390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44260390131bSFrank Mayhar 4427617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4428ac27a0ecSDave Kleikamp 4429ac27a0ecSDave Kleikamp /* 4430ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4431617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4432ac27a0ecSDave Kleikamp */ 4433ac27a0ecSDave Kleikamp 4434dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4435ac27a0ecSDave Kleikamp if (j_errno) { 4436ac27a0ecSDave Kleikamp char nbuf[16]; 4437ac27a0ecSDave Kleikamp 4438617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 443912062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4440ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 444112062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4442ac27a0ecSDave Kleikamp 4443617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4444617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4445e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4446ac27a0ecSDave Kleikamp 4447dab291afSMingming Cao jbd2_journal_clear_err(journal); 4448d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4449ac27a0ecSDave Kleikamp } 4450ac27a0ecSDave Kleikamp } 4451ac27a0ecSDave Kleikamp 4452ac27a0ecSDave Kleikamp /* 4453ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4454ac27a0ecSDave Kleikamp * and wait on the commit. 4455ac27a0ecSDave Kleikamp */ 4456617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4457ac27a0ecSDave Kleikamp { 4458ac27a0ecSDave Kleikamp journal_t *journal; 44590390131bSFrank Mayhar int ret = 0; 4460ac27a0ecSDave Kleikamp 4461ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4462ac27a0ecSDave Kleikamp return 0; 4463ac27a0ecSDave Kleikamp 4464617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 44658e8ad8a5SJan Kara if (journal) 4466617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 44670390131bSFrank Mayhar 4468ac27a0ecSDave Kleikamp return ret; 4469ac27a0ecSDave Kleikamp } 4470ac27a0ecSDave Kleikamp 4471617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4472ac27a0ecSDave Kleikamp { 447314ce0cb4STheodore Ts'o int ret = 0; 44749eddacf9SJan Kara tid_t target; 44758d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4476ac27a0ecSDave Kleikamp 44779bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 44788d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 4479a1177825SJan Kara /* 4480a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4481a1177825SJan Kara * no dirty dquots 4482a1177825SJan Kara */ 4483a1177825SJan Kara dquot_writeback_dquots(sb, -1); 44848d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4485ac27a0ecSDave Kleikamp if (wait) 44868d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 44870390131bSFrank Mayhar } 448814ce0cb4STheodore Ts'o return ret; 4489ac27a0ecSDave Kleikamp } 4490ac27a0ecSDave Kleikamp 4491ac27a0ecSDave Kleikamp /* 4492ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4493ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4494be4f27d3SYongqiang Yang * 4495be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 44968e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 44978e8ad8a5SJan Kara * modifications. 4498ac27a0ecSDave Kleikamp */ 4499c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4500ac27a0ecSDave Kleikamp { 4501c4be0c1dSTakashi Sato int error = 0; 4502c4be0c1dSTakashi Sato journal_t *journal; 4503ac27a0ecSDave Kleikamp 45049ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 45059ca92389STheodore Ts'o return 0; 45069ca92389STheodore Ts'o 4507c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4508ac27a0ecSDave Kleikamp 4509ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4510dab291afSMingming Cao jbd2_journal_lock_updates(journal); 45117ffe1ea8SHidehiro Kawai 45127ffe1ea8SHidehiro Kawai /* 45139ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 45149ca92389STheodore Ts'o * the journal. 45157ffe1ea8SHidehiro Kawai */ 4516c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 45176b0310fbSEric Sandeen if (error < 0) 45186b0310fbSEric Sandeen goto out; 4519ac27a0ecSDave Kleikamp 4520ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4521617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4522e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 45236b0310fbSEric Sandeen out: 45248e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 45256b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 45266b0310fbSEric Sandeen return error; 4527ac27a0ecSDave Kleikamp } 4528ac27a0ecSDave Kleikamp 4529ac27a0ecSDave Kleikamp /* 4530ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4531ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4532ac27a0ecSDave Kleikamp */ 4533c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4534ac27a0ecSDave Kleikamp { 45359ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 45369ca92389STheodore Ts'o return 0; 45379ca92389STheodore Ts'o 4538ac27a0ecSDave Kleikamp lock_super(sb); 45399ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4540617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4541e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4542ac27a0ecSDave Kleikamp unlock_super(sb); 4543c4be0c1dSTakashi Sato return 0; 4544ac27a0ecSDave Kleikamp } 4545ac27a0ecSDave Kleikamp 4546673c6100STheodore Ts'o /* 4547673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4548673c6100STheodore Ts'o */ 4549673c6100STheodore Ts'o struct ext4_mount_options { 4550673c6100STheodore Ts'o unsigned long s_mount_opt; 4551a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 455208cefc7aSEric W. Biederman kuid_t s_resuid; 455308cefc7aSEric W. Biederman kgid_t s_resgid; 4554673c6100STheodore Ts'o unsigned long s_commit_interval; 4555673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4556673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4557673c6100STheodore Ts'o int s_jquota_fmt; 4558673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4559673c6100STheodore Ts'o #endif 4560673c6100STheodore Ts'o }; 4561673c6100STheodore Ts'o 4562617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4563ac27a0ecSDave Kleikamp { 4564617ba13bSMingming Cao struct ext4_super_block *es; 4565617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4566ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4567617ba13bSMingming Cao struct ext4_mount_options old_opts; 4568c79d967dSChristoph Hellwig int enable_quota = 0; 45698a266467STheodore Ts'o ext4_group_t g; 4570b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4571c5e06d10SJohann Lombardi int err = 0; 4572ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4573ac27a0ecSDave Kleikamp int i; 4574ac27a0ecSDave Kleikamp #endif 4575d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4576ac27a0ecSDave Kleikamp 4577ac27a0ecSDave Kleikamp /* Store the original options */ 4578bbd6851aSAl Viro lock_super(sb); 4579ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4580ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4581a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4582ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4583ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4584ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 458530773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 458630773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4587ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4588ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4589ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4590ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4591ac27a0ecSDave Kleikamp #endif 4592b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4593b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4594ac27a0ecSDave Kleikamp 4595ac27a0ecSDave Kleikamp /* 4596ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4597ac27a0ecSDave Kleikamp */ 4598661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4599ac27a0ecSDave Kleikamp err = -EINVAL; 4600ac27a0ecSDave Kleikamp goto restore_opts; 4601ac27a0ecSDave Kleikamp } 4602ac27a0ecSDave Kleikamp 46034ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4604c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4605ac27a0ecSDave Kleikamp 4606ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4607482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4608ac27a0ecSDave Kleikamp 4609ac27a0ecSDave Kleikamp es = sbi->s_es; 4610ac27a0ecSDave Kleikamp 4611b3881f74STheodore Ts'o if (sbi->s_journal) { 4612617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4613b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4614b3881f74STheodore Ts'o } 4615ac27a0ecSDave Kleikamp 4616661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 46174ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4618ac27a0ecSDave Kleikamp err = -EROFS; 4619ac27a0ecSDave Kleikamp goto restore_opts; 4620ac27a0ecSDave Kleikamp } 4621ac27a0ecSDave Kleikamp 4622ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 46230f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 46240f0dd62fSChristoph Hellwig if (err < 0) 4625c79d967dSChristoph Hellwig goto restore_opts; 4626c79d967dSChristoph Hellwig 4627ac27a0ecSDave Kleikamp /* 4628ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4629ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4630ac27a0ecSDave Kleikamp */ 4631ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4632ac27a0ecSDave Kleikamp 4633ac27a0ecSDave Kleikamp /* 4634ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4635ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4636ac27a0ecSDave Kleikamp * mark the partition as valid again. 4637ac27a0ecSDave Kleikamp */ 4638617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4639617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4640ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4641ac27a0ecSDave Kleikamp 4642a63c9eb2STheodore Ts'o if (sbi->s_journal) 4643617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4644ac27a0ecSDave Kleikamp } else { 4645a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4646a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4647ac27a0ecSDave Kleikamp err = -EROFS; 4648ac27a0ecSDave Kleikamp goto restore_opts; 4649ac27a0ecSDave Kleikamp } 4650ead6596bSEric Sandeen /* 46518a266467STheodore Ts'o * Make sure the group descriptor checksums 46520b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 46538a266467STheodore Ts'o */ 46548a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 46558a266467STheodore Ts'o struct ext4_group_desc *gdp = 46568a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 46578a266467STheodore Ts'o 4658feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4659b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4660b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 46618a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 46628a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 46638a266467STheodore Ts'o err = -EINVAL; 46648a266467STheodore Ts'o goto restore_opts; 46658a266467STheodore Ts'o } 46668a266467STheodore Ts'o } 46678a266467STheodore Ts'o 46688a266467STheodore Ts'o /* 4669ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4670ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4671ead6596bSEric Sandeen * require a full umount/remount for now. 4672ead6596bSEric Sandeen */ 4673ead6596bSEric Sandeen if (es->s_last_orphan) { 4674b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4675ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4676ead6596bSEric Sandeen "orphan inode list. Please " 4677b31e1552SEric Sandeen "umount/remount instead"); 4678ead6596bSEric Sandeen err = -EINVAL; 4679ead6596bSEric Sandeen goto restore_opts; 4680ead6596bSEric Sandeen } 4681ead6596bSEric Sandeen 4682ac27a0ecSDave Kleikamp /* 4683ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4684ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4685ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4686ac27a0ecSDave Kleikamp * the partition.) 4687ac27a0ecSDave Kleikamp */ 46880390131bSFrank Mayhar if (sbi->s_journal) 4689617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4690ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4691617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4692ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4693c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4694c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4695c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4696c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4697c5e06d10SJohann Lombardi err = -EROFS; 4698c5e06d10SJohann Lombardi goto restore_opts; 4699c5e06d10SJohann Lombardi } 4700c79d967dSChristoph Hellwig enable_quota = 1; 4701ac27a0ecSDave Kleikamp } 4702ac27a0ecSDave Kleikamp } 4703bfff6873SLukas Czerner 4704bfff6873SLukas Czerner /* 4705bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4706bfff6873SLukas Czerner * current settings 4707bfff6873SLukas Czerner */ 4708bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4709bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4710bfff6873SLukas Czerner else { 4711bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4712bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4713bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4714bfff6873SLukas Czerner } 4715bfff6873SLukas Czerner 47166fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 47170390131bSFrank Mayhar if (sbi->s_journal == NULL) 4718e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 47190390131bSFrank Mayhar 47207c319d32SAditya Kali unlock_super(sb); 4721ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4722ac27a0ecSDave Kleikamp /* Release old quota file names */ 4723ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4724ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4725ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4726ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 47277c319d32SAditya Kali if (enable_quota) { 47287c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 47290f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 47307c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 47317c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 47327c319d32SAditya Kali err = ext4_enable_quotas(sb); 47337c319d32SAditya Kali if (err) { 47347c319d32SAditya Kali lock_super(sb); 47357c319d32SAditya Kali goto restore_opts; 47367c319d32SAditya Kali } 47377c319d32SAditya Kali } 47387c319d32SAditya Kali } 47397c319d32SAditya Kali #endif 4740d4c402d9SCurt Wohlgemuth 4741d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4742d4c402d9SCurt Wohlgemuth kfree(orig_data); 4743ac27a0ecSDave Kleikamp return 0; 47440b8e58a1SAndreas Dilger 4745ac27a0ecSDave Kleikamp restore_opts: 4746ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4747ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4748a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4749ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4750ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4751ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 475230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 475330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4754ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4755ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4756ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4757ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4758ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4759ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4760ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4761ac27a0ecSDave Kleikamp } 4762ac27a0ecSDave Kleikamp #endif 4763bbd6851aSAl Viro unlock_super(sb); 4764d4c402d9SCurt Wohlgemuth kfree(orig_data); 4765ac27a0ecSDave Kleikamp return err; 4766ac27a0ecSDave Kleikamp } 4767ac27a0ecSDave Kleikamp 4768617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4769ac27a0ecSDave Kleikamp { 4770ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4771617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4772617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4773952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 4774960cc398SPekka Enberg u64 fsid; 4775d02a9391SKazuya Mio s64 bfree; 4776ac27a0ecSDave Kleikamp 4777952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 4778952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 4779ac27a0ecSDave Kleikamp 4780617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4781ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4782952fc18eSTheodore Ts'o buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, sbi->s_overhead); 478357042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 478457042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4785d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 478657042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 4787bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4788bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4789ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4790ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 479152d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4792617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4793960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4794960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4795960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4796960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 47970b8e58a1SAndreas Dilger 4798ac27a0ecSDave Kleikamp return 0; 4799ac27a0ecSDave Kleikamp } 4800ac27a0ecSDave Kleikamp 48010b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 48020b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4803ac27a0ecSDave Kleikamp * Process 1 Process 2 4804617ba13bSMingming Cao * ext4_create() quota_sync() 4805dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4806871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4807dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4808ac27a0ecSDave Kleikamp * 4809ac27a0ecSDave Kleikamp */ 4810ac27a0ecSDave Kleikamp 4811ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4812ac27a0ecSDave Kleikamp 4813ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4814ac27a0ecSDave Kleikamp { 4815ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4816ac27a0ecSDave Kleikamp } 4817ac27a0ecSDave Kleikamp 4818617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4819ac27a0ecSDave Kleikamp { 4820ac27a0ecSDave Kleikamp int ret, err; 4821ac27a0ecSDave Kleikamp handle_t *handle; 4822ac27a0ecSDave Kleikamp struct inode *inode; 4823ac27a0ecSDave Kleikamp 4824ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4825617ba13bSMingming Cao handle = ext4_journal_start(inode, 4826617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4827ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4828ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4829ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4830617ba13bSMingming Cao err = ext4_journal_stop(handle); 4831ac27a0ecSDave Kleikamp if (!ret) 4832ac27a0ecSDave Kleikamp ret = err; 4833ac27a0ecSDave Kleikamp return ret; 4834ac27a0ecSDave Kleikamp } 4835ac27a0ecSDave Kleikamp 4836617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4837ac27a0ecSDave Kleikamp { 4838ac27a0ecSDave Kleikamp int ret, err; 4839ac27a0ecSDave Kleikamp handle_t *handle; 4840ac27a0ecSDave Kleikamp 4841617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4842617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4843ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4844ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4845ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4846617ba13bSMingming Cao err = ext4_journal_stop(handle); 4847ac27a0ecSDave Kleikamp if (!ret) 4848ac27a0ecSDave Kleikamp ret = err; 4849ac27a0ecSDave Kleikamp return ret; 4850ac27a0ecSDave Kleikamp } 4851ac27a0ecSDave Kleikamp 4852617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4853ac27a0ecSDave Kleikamp { 4854ac27a0ecSDave Kleikamp int ret, err; 4855ac27a0ecSDave Kleikamp handle_t *handle; 4856ac27a0ecSDave Kleikamp 4857617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4858617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 48599c3013e9SJan Kara if (IS_ERR(handle)) { 48609c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 48619c3013e9SJan Kara dquot_release(dquot); 4862ac27a0ecSDave Kleikamp return PTR_ERR(handle); 48639c3013e9SJan Kara } 4864ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4865617ba13bSMingming Cao err = ext4_journal_stop(handle); 4866ac27a0ecSDave Kleikamp if (!ret) 4867ac27a0ecSDave Kleikamp ret = err; 4868ac27a0ecSDave Kleikamp return ret; 4869ac27a0ecSDave Kleikamp } 4870ac27a0ecSDave Kleikamp 4871617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4872ac27a0ecSDave Kleikamp { 48732c8be6b2SJan Kara /* Are we journaling quotas? */ 4874617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4875617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4876ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4877617ba13bSMingming Cao return ext4_write_dquot(dquot); 4878ac27a0ecSDave Kleikamp } else { 4879ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4880ac27a0ecSDave Kleikamp } 4881ac27a0ecSDave Kleikamp } 4882ac27a0ecSDave Kleikamp 4883617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4884ac27a0ecSDave Kleikamp { 4885ac27a0ecSDave Kleikamp int ret, err; 4886ac27a0ecSDave Kleikamp handle_t *handle; 4887ac27a0ecSDave Kleikamp 4888ac27a0ecSDave Kleikamp /* Data block + inode block */ 4889617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4890ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4891ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4892ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4893617ba13bSMingming Cao err = ext4_journal_stop(handle); 4894ac27a0ecSDave Kleikamp if (!ret) 4895ac27a0ecSDave Kleikamp ret = err; 4896ac27a0ecSDave Kleikamp return ret; 4897ac27a0ecSDave Kleikamp } 4898ac27a0ecSDave Kleikamp 4899ac27a0ecSDave Kleikamp /* 4900ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4901ac27a0ecSDave Kleikamp * the quota file and such... 4902ac27a0ecSDave Kleikamp */ 4903617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4904ac27a0ecSDave Kleikamp { 4905287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4906617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4907ac27a0ecSDave Kleikamp } 4908ac27a0ecSDave Kleikamp 4909ac27a0ecSDave Kleikamp /* 4910ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4911ac27a0ecSDave Kleikamp */ 4912617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4913f00c9e44SJan Kara struct path *path) 4914ac27a0ecSDave Kleikamp { 4915ac27a0ecSDave Kleikamp int err; 4916ac27a0ecSDave Kleikamp 4917ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4918ac27a0ecSDave Kleikamp return -EINVAL; 49190623543bSJan Kara 4920ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4921d8c9584eSAl Viro if (path->dentry->d_sb != sb) 4922ac27a0ecSDave Kleikamp return -EXDEV; 49230623543bSJan Kara /* Journaling quota? */ 49240623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 49252b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4926f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4927b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4928b31e1552SEric Sandeen "Quota file not on filesystem root. " 4929b31e1552SEric Sandeen "Journaled quota will not work"); 49300623543bSJan Kara } 49310623543bSJan Kara 49320623543bSJan Kara /* 49330623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 49340623543bSJan Kara * all updates to the file when we bypass pagecache... 49350623543bSJan Kara */ 49360390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4937f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 49380623543bSJan Kara /* 49390623543bSJan Kara * We don't need to lock updates but journal_flush() could 49400623543bSJan Kara * otherwise be livelocked... 49410623543bSJan Kara */ 49420623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 49437ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 49440623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4945f00c9e44SJan Kara if (err) 49467ffe1ea8SHidehiro Kawai return err; 49477ffe1ea8SHidehiro Kawai } 49480623543bSJan Kara 4949f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4950ac27a0ecSDave Kleikamp } 4951ac27a0ecSDave Kleikamp 49527c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 49537c319d32SAditya Kali unsigned int flags) 49547c319d32SAditya Kali { 49557c319d32SAditya Kali int err; 49567c319d32SAditya Kali struct inode *qf_inode; 49577c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 49587c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 49597c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 49607c319d32SAditya Kali }; 49617c319d32SAditya Kali 49627c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 49637c319d32SAditya Kali 49647c319d32SAditya Kali if (!qf_inums[type]) 49657c319d32SAditya Kali return -EPERM; 49667c319d32SAditya Kali 49677c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 49687c319d32SAditya Kali if (IS_ERR(qf_inode)) { 49697c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 49707c319d32SAditya Kali return PTR_ERR(qf_inode); 49717c319d32SAditya Kali } 49727c319d32SAditya Kali 49737c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 49747c319d32SAditya Kali iput(qf_inode); 49757c319d32SAditya Kali 49767c319d32SAditya Kali return err; 49777c319d32SAditya Kali } 49787c319d32SAditya Kali 49797c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 49807c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 49817c319d32SAditya Kali { 49827c319d32SAditya Kali int type, err = 0; 49837c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 49847c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 49857c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 49867c319d32SAditya Kali }; 49877c319d32SAditya Kali 49887c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 49897c319d32SAditya Kali for (type = 0; type < MAXQUOTAS; type++) { 49907c319d32SAditya Kali if (qf_inums[type]) { 49917c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 49927c319d32SAditya Kali DQUOT_USAGE_ENABLED); 49937c319d32SAditya Kali if (err) { 49947c319d32SAditya Kali ext4_warning(sb, 49957c319d32SAditya Kali "Failed to enable quota (type=%d) " 49967c319d32SAditya Kali "tracking. Please run e2fsck to fix.", 49977c319d32SAditya Kali type); 49987c319d32SAditya Kali return err; 49997c319d32SAditya Kali } 50007c319d32SAditya Kali } 50017c319d32SAditya Kali } 50027c319d32SAditya Kali return 0; 50037c319d32SAditya Kali } 50047c319d32SAditya Kali 50057c319d32SAditya Kali /* 50067c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 50077c319d32SAditya Kali */ 50087c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 50097c319d32SAditya Kali int format_id) 50107c319d32SAditya Kali { 50117c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 50127c319d32SAditya Kali return -EINVAL; 50137c319d32SAditya Kali 50147c319d32SAditya Kali /* 50157c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 50167c319d32SAditya Kali */ 50177c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 50187c319d32SAditya Kali } 50197c319d32SAditya Kali 5020ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5021ca0e05e4SDmitry Monakhov { 502221f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 502321f97697SJan Kara handle_t *handle; 502421f97697SJan Kara 502587009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 502687009d86SDmitry Monakhov * Caller already holds s_umount sem */ 502787009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5028ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5029ca0e05e4SDmitry Monakhov 50300b268590SAmir Goldstein if (!inode) 50310b268590SAmir Goldstein goto out; 50320b268590SAmir Goldstein 503321f97697SJan Kara /* Update modification times of quota files when userspace can 503421f97697SJan Kara * start looking at them */ 503521f97697SJan Kara handle = ext4_journal_start(inode, 1); 503621f97697SJan Kara if (IS_ERR(handle)) 503721f97697SJan Kara goto out; 503821f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 503921f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 504021f97697SJan Kara ext4_journal_stop(handle); 504121f97697SJan Kara 504221f97697SJan Kara out: 5043ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5044ca0e05e4SDmitry Monakhov } 5045ca0e05e4SDmitry Monakhov 50467c319d32SAditya Kali /* 50477c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 50487c319d32SAditya Kali */ 50497c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 50507c319d32SAditya Kali { 50517c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 50527c319d32SAditya Kali return -EINVAL; 50537c319d32SAditya Kali 50547c319d32SAditya Kali /* Disable only the limits. */ 50557c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 50567c319d32SAditya Kali } 50577c319d32SAditya Kali 5058ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5059ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5060ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5061ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5062617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5063ac27a0ecSDave Kleikamp size_t len, loff_t off) 5064ac27a0ecSDave Kleikamp { 5065ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5066725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5067ac27a0ecSDave Kleikamp int err = 0; 5068ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5069ac27a0ecSDave Kleikamp int tocopy; 5070ac27a0ecSDave Kleikamp size_t toread; 5071ac27a0ecSDave Kleikamp struct buffer_head *bh; 5072ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5073ac27a0ecSDave Kleikamp 5074ac27a0ecSDave Kleikamp if (off > i_size) 5075ac27a0ecSDave Kleikamp return 0; 5076ac27a0ecSDave Kleikamp if (off+len > i_size) 5077ac27a0ecSDave Kleikamp len = i_size-off; 5078ac27a0ecSDave Kleikamp toread = len; 5079ac27a0ecSDave Kleikamp while (toread > 0) { 5080ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5081ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 5082617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 5083ac27a0ecSDave Kleikamp if (err) 5084ac27a0ecSDave Kleikamp return err; 5085ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5086ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5087ac27a0ecSDave Kleikamp else 5088ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5089ac27a0ecSDave Kleikamp brelse(bh); 5090ac27a0ecSDave Kleikamp offset = 0; 5091ac27a0ecSDave Kleikamp toread -= tocopy; 5092ac27a0ecSDave Kleikamp data += tocopy; 5093ac27a0ecSDave Kleikamp blk++; 5094ac27a0ecSDave Kleikamp } 5095ac27a0ecSDave Kleikamp return len; 5096ac27a0ecSDave Kleikamp } 5097ac27a0ecSDave Kleikamp 5098ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5099ac27a0ecSDave Kleikamp * enough credits) */ 5100617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5101ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5102ac27a0ecSDave Kleikamp { 5103ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5104725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5105ac27a0ecSDave Kleikamp int err = 0; 5106ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5107ac27a0ecSDave Kleikamp struct buffer_head *bh; 5108ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5109ac27a0ecSDave Kleikamp 51100390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5111b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5112b31e1552SEric Sandeen " cancelled because transaction is not started", 51139c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 51149c3013e9SJan Kara return -EIO; 51159c3013e9SJan Kara } 511667eeb568SDmitry Monakhov /* 511767eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 511867eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 511967eeb568SDmitry Monakhov */ 512067eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 512167eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 512267eeb568SDmitry Monakhov " cancelled because not block aligned", 512367eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 512467eeb568SDmitry Monakhov return -EIO; 512567eeb568SDmitry Monakhov } 512667eeb568SDmitry Monakhov 5127617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 5128ac27a0ecSDave Kleikamp if (!bh) 5129ac27a0ecSDave Kleikamp goto out; 5130617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5131ac27a0ecSDave Kleikamp if (err) { 5132ac27a0ecSDave Kleikamp brelse(bh); 5133ac27a0ecSDave Kleikamp goto out; 5134ac27a0ecSDave Kleikamp } 5135ac27a0ecSDave Kleikamp lock_buffer(bh); 513667eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5137ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5138ac27a0ecSDave Kleikamp unlock_buffer(bh); 51390390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5140ac27a0ecSDave Kleikamp brelse(bh); 5141ac27a0ecSDave Kleikamp out: 51420b7f7cefSJan Kara if (err) 5143ac27a0ecSDave Kleikamp return err; 514467eeb568SDmitry Monakhov if (inode->i_size < off + len) { 514567eeb568SDmitry Monakhov i_size_write(inode, off + len); 5146617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5147617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 514821f97697SJan Kara } 514967eeb568SDmitry Monakhov return len; 5150ac27a0ecSDave Kleikamp } 5151ac27a0ecSDave Kleikamp 5152ac27a0ecSDave Kleikamp #endif 5153ac27a0ecSDave Kleikamp 5154152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5155152a0836SAl Viro const char *dev_name, void *data) 5156ac27a0ecSDave Kleikamp { 5157152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5158ac27a0ecSDave Kleikamp } 5159ac27a0ecSDave Kleikamp 516037f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 516124b58424STheodore Ts'o static inline void register_as_ext2(void) 516224b58424STheodore Ts'o { 516324b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 516424b58424STheodore Ts'o if (err) 516524b58424STheodore Ts'o printk(KERN_WARNING 516624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 516724b58424STheodore Ts'o } 516824b58424STheodore Ts'o 516924b58424STheodore Ts'o static inline void unregister_as_ext2(void) 517024b58424STheodore Ts'o { 517124b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 517224b58424STheodore Ts'o } 51732035e776STheodore Ts'o 51742035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 51752035e776STheodore Ts'o { 51762035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 51772035e776STheodore Ts'o return 0; 51782035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 51792035e776STheodore Ts'o return 1; 51802035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 51812035e776STheodore Ts'o return 0; 51822035e776STheodore Ts'o return 1; 51832035e776STheodore Ts'o } 518451b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 518524b58424STheodore Ts'o #else 518624b58424STheodore Ts'o static inline void register_as_ext2(void) { } 518724b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 51882035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 518924b58424STheodore Ts'o #endif 519024b58424STheodore Ts'o 519137f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 519224b58424STheodore Ts'o static inline void register_as_ext3(void) 519324b58424STheodore Ts'o { 519424b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 519524b58424STheodore Ts'o if (err) 519624b58424STheodore Ts'o printk(KERN_WARNING 519724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 519824b58424STheodore Ts'o } 519924b58424STheodore Ts'o 520024b58424STheodore Ts'o static inline void unregister_as_ext3(void) 520124b58424STheodore Ts'o { 520224b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 520324b58424STheodore Ts'o } 52042035e776STheodore Ts'o 52052035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 52062035e776STheodore Ts'o { 52072035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 52082035e776STheodore Ts'o return 0; 52092035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 52102035e776STheodore Ts'o return 0; 52112035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 52122035e776STheodore Ts'o return 1; 52132035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 52142035e776STheodore Ts'o return 0; 52152035e776STheodore Ts'o return 1; 52162035e776STheodore Ts'o } 521751b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 521824b58424STheodore Ts'o #else 521924b58424STheodore Ts'o static inline void register_as_ext3(void) { } 522024b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 52212035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 522224b58424STheodore Ts'o #endif 522324b58424STheodore Ts'o 522403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5225ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 522603010a33STheodore Ts'o .name = "ext4", 5227152a0836SAl Viro .mount = ext4_mount, 5228ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5229ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5230ac27a0ecSDave Kleikamp }; 5231ac27a0ecSDave Kleikamp 52328f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5233857ac889SLukas Czerner { 5234857ac889SLukas Czerner struct ext4_features *ef; 5235857ac889SLukas Czerner int ret = -ENOMEM; 5236857ac889SLukas Czerner 5237857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5238857ac889SLukas Czerner if (!ef) 5239857ac889SLukas Czerner goto out; 5240857ac889SLukas Czerner 5241857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5242857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5243857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5244857ac889SLukas Czerner "features"); 5245857ac889SLukas Czerner if (ret) { 5246857ac889SLukas Czerner kfree(ef); 5247857ac889SLukas Czerner goto out; 5248857ac889SLukas Czerner } 5249857ac889SLukas Czerner 5250857ac889SLukas Czerner ext4_feat = ef; 5251857ac889SLukas Czerner ret = 0; 5252857ac889SLukas Czerner out: 5253857ac889SLukas Czerner return ret; 5254857ac889SLukas Czerner } 5255857ac889SLukas Czerner 52568f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 52578f021222SLukas Czerner { 52588f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 52598f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 52608f021222SLukas Czerner kfree(ext4_feat); 52618f021222SLukas Czerner } 52628f021222SLukas Czerner 5263e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5264e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5265e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5266e9e3bcecSEric Sandeen 52675dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5268ac27a0ecSDave Kleikamp { 5269e9e3bcecSEric Sandeen int i, err; 5270c9de560dSAlex Tomas 527107c0c5d8SAl Viro ext4_li_info = NULL; 527207c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 527307c0c5d8SAl Viro 527412e9b892SDmitry Monakhov ext4_check_flag_values(); 5275e9e3bcecSEric Sandeen 5276e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5277e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5278e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5279e9e3bcecSEric Sandeen } 5280e9e3bcecSEric Sandeen 52815dabfc78STheodore Ts'o err = ext4_init_pageio(); 52826fd058f7STheodore Ts'o if (err) 52836fd058f7STheodore Ts'o return err; 52845dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5285bd2d0210STheodore Ts'o if (err) 5286d44651d0SFabrice Jouhaud goto out6; 52873197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 52883197ebdbSTheodore Ts'o if (!ext4_kset) 5289dd68314cSTheodore Ts'o goto out5; 5290d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5291857ac889SLukas Czerner 5292857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5293dd68314cSTheodore Ts'o if (err) 5294dd68314cSTheodore Ts'o goto out4; 5295857ac889SLukas Czerner 52965dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5297ac27a0ecSDave Kleikamp if (err) 52986fd058f7STheodore Ts'o goto out3; 5299c9de560dSAlex Tomas 53005dabfc78STheodore Ts'o err = ext4_init_xattr(); 5301c9de560dSAlex Tomas if (err) 5302c9de560dSAlex Tomas goto out2; 5303ac27a0ecSDave Kleikamp err = init_inodecache(); 5304ac27a0ecSDave Kleikamp if (err) 5305ac27a0ecSDave Kleikamp goto out1; 530624b58424STheodore Ts'o register_as_ext3(); 53072035e776STheodore Ts'o register_as_ext2(); 530803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5309ac27a0ecSDave Kleikamp if (err) 5310ac27a0ecSDave Kleikamp goto out; 5311bfff6873SLukas Czerner 5312ac27a0ecSDave Kleikamp return 0; 5313ac27a0ecSDave Kleikamp out: 531424b58424STheodore Ts'o unregister_as_ext2(); 531524b58424STheodore Ts'o unregister_as_ext3(); 5316ac27a0ecSDave Kleikamp destroy_inodecache(); 5317ac27a0ecSDave Kleikamp out1: 53185dabfc78STheodore Ts'o ext4_exit_xattr(); 5319c9de560dSAlex Tomas out2: 53205dabfc78STheodore Ts'o ext4_exit_mballoc(); 53216fd058f7STheodore Ts'o out3: 53228f021222SLukas Czerner ext4_exit_feat_adverts(); 53236fd058f7STheodore Ts'o out4: 5324d44651d0SFabrice Jouhaud if (ext4_proc_root) 5325dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5326dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5327d44651d0SFabrice Jouhaud out5: 5328dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5329d44651d0SFabrice Jouhaud out6: 53305dabfc78STheodore Ts'o ext4_exit_pageio(); 5331ac27a0ecSDave Kleikamp return err; 5332ac27a0ecSDave Kleikamp } 5333ac27a0ecSDave Kleikamp 53345dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5335ac27a0ecSDave Kleikamp { 5336bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 533724b58424STheodore Ts'o unregister_as_ext2(); 533824b58424STheodore Ts'o unregister_as_ext3(); 533903010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5340ac27a0ecSDave Kleikamp destroy_inodecache(); 53415dabfc78STheodore Ts'o ext4_exit_xattr(); 53425dabfc78STheodore Ts'o ext4_exit_mballoc(); 53438f021222SLukas Czerner ext4_exit_feat_adverts(); 53449f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 53453197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 53465dabfc78STheodore Ts'o ext4_exit_system_zone(); 53475dabfc78STheodore Ts'o ext4_exit_pageio(); 5348ac27a0ecSDave Kleikamp } 5349ac27a0ecSDave Kleikamp 5350ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 535183982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5352ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 53535dabfc78STheodore Ts'o module_init(ext4_init_fs) 53545dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5355