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, 1233ac27a0ecSDave Kleikamp }; 1234ac27a0ecSDave Kleikamp 1235a447c093SSteven Whitehouse static const match_table_t tokens = { 1236ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1237ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1238ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1239ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1240ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1241ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1242ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1243ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1244ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1245ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1246ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1247ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1248ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1249ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 125072578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 125172578c33STheodore Ts'o {Opt_removed, "orlov"}, 1252ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1253ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1254ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1255ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1256e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 12575a916be1STheodore Ts'o {Opt_noload, "noload"}, 125872578c33STheodore Ts'o {Opt_removed, "nobh"}, 125972578c33STheodore Ts'o {Opt_removed, "bh"}, 1260ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 126130773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 126230773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1263ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1264818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1265818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1266ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1267ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1268ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1269ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12705bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12715bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1272ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1273ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1274ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1275ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1276ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1277ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12785a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1279ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1280ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1281ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1282ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1283ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 128406705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 128506705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 128625ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1287c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 128864769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1289dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 12901449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 12911449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 12926fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12936fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1294240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1295b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1296afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 129706705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 129806705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1299744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1300744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13015328e635SEric Sandeen {Opt_discard, "discard"}, 13025328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1303fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1304fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1305fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1306c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1307c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1308c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1309c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1310c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1311f3f12faaSJosef Bacik {Opt_err, NULL}, 1312ac27a0ecSDave Kleikamp }; 1313ac27a0ecSDave Kleikamp 1314617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1315ac27a0ecSDave Kleikamp { 1316617ba13bSMingming Cao ext4_fsblk_t sb_block; 1317ac27a0ecSDave Kleikamp char *options = (char *) *data; 1318ac27a0ecSDave Kleikamp 1319ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1320ac27a0ecSDave Kleikamp return 1; /* Default location */ 13210b8e58a1SAndreas Dilger 1322ac27a0ecSDave Kleikamp options += 3; 13230b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1324ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1325ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13264776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1327ac27a0ecSDave Kleikamp (char *) *data); 1328ac27a0ecSDave Kleikamp return 1; 1329ac27a0ecSDave Kleikamp } 1330ac27a0ecSDave Kleikamp if (*options == ',') 1331ac27a0ecSDave Kleikamp options++; 1332ac27a0ecSDave Kleikamp *data = (void *) options; 13330b8e58a1SAndreas Dilger 1334ac27a0ecSDave Kleikamp return sb_block; 1335ac27a0ecSDave Kleikamp } 1336ac27a0ecSDave Kleikamp 1337b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1338437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1339437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1340b3881f74STheodore Ts'o 134156c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 134256c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 134356c50f11SDmitry Monakhov { 134456c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 134556c50f11SDmitry Monakhov char *qname; 134656c50f11SDmitry Monakhov 134756c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 134856c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 134956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 135056c50f11SDmitry Monakhov "Cannot change journaled " 135156c50f11SDmitry Monakhov "quota options when quota turned on"); 135257f73c2cSTheodore Ts'o return -1; 135356c50f11SDmitry Monakhov } 135456c50f11SDmitry Monakhov qname = match_strdup(args); 135556c50f11SDmitry Monakhov if (!qname) { 135656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 135756c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 135857f73c2cSTheodore Ts'o return -1; 135956c50f11SDmitry Monakhov } 136056c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 136156c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 136256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 136356c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 136456c50f11SDmitry Monakhov kfree(qname); 136557f73c2cSTheodore Ts'o return -1; 136656c50f11SDmitry Monakhov } 136756c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 136856c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 136956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 137056c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 137156c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 137256c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 137357f73c2cSTheodore Ts'o return -1; 137456c50f11SDmitry Monakhov } 1375fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 137656c50f11SDmitry Monakhov return 1; 137756c50f11SDmitry Monakhov } 137856c50f11SDmitry Monakhov 137956c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 138056c50f11SDmitry Monakhov { 138156c50f11SDmitry Monakhov 138256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 138356c50f11SDmitry Monakhov 138456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 138556c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 138656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 138756c50f11SDmitry Monakhov " when quota turned on"); 138857f73c2cSTheodore Ts'o return -1; 138956c50f11SDmitry Monakhov } 139056c50f11SDmitry Monakhov /* 139156c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 139256c50f11SDmitry Monakhov * to be correct 139356c50f11SDmitry Monakhov */ 139456c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 139556c50f11SDmitry Monakhov return 1; 139656c50f11SDmitry Monakhov } 139756c50f11SDmitry Monakhov #endif 139856c50f11SDmitry Monakhov 139926092bf5STheodore Ts'o #define MOPT_SET 0x0001 140026092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 140126092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 140226092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 140326092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 140426092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 140526092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 140626092bf5STheodore Ts'o #define MOPT_Q 0 140726092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 140826092bf5STheodore Ts'o #else 140926092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 141026092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 141126092bf5STheodore Ts'o #endif 141226092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 141326092bf5STheodore Ts'o 141426092bf5STheodore Ts'o static const struct mount_opts { 141526092bf5STheodore Ts'o int token; 141626092bf5STheodore Ts'o int mount_opt; 141726092bf5STheodore Ts'o int flags; 141826092bf5STheodore Ts'o } ext4_mount_opts[] = { 141926092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 142026092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 142126092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 142226092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 142326092bf5STheodore Ts'o {Opt_mblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_SET}, 142426092bf5STheodore Ts'o {Opt_nomblk_io_submit, EXT4_MOUNT_MBLK_IO_SUBMIT, MOPT_CLEAR}, 142526092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 142626092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 142726092bf5STheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_SET}, 142826092bf5STheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, MOPT_CLEAR}, 142926092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 143026092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 143126092bf5STheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, MOPT_SET | MOPT_EXPLICIT}, 143226092bf5STheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, MOPT_CLEAR | MOPT_EXPLICIT}, 143326092bf5STheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, MOPT_SET}, 143426092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 143526092bf5STheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), MOPT_SET}, 143626092bf5STheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_SET}, 143726092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 143826092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 143926092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 144026092bf5STheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_SET}, 144126092bf5STheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_CLEAR}, 144226092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 144326092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 144426092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 144526092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 144626092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 144726092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 144826092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 144926092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 145026092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 145126092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 145226092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 145326092bf5STheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ}, 145426092bf5STheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ}, 145526092bf5STheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ}, 145626092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 145726092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 145826092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 145926092bf5STheodore Ts'o #else 146026092bf5STheodore Ts'o {Opt_user_xattr, 0, MOPT_NOSUPPORT}, 146126092bf5STheodore Ts'o {Opt_nouser_xattr, 0, MOPT_NOSUPPORT}, 146226092bf5STheodore Ts'o #endif 146326092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 146426092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 146526092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 146626092bf5STheodore Ts'o #else 146726092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 146826092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 146926092bf5STheodore Ts'o #endif 147026092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 147126092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 147226092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 147326092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 147426092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 147526092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 147626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 147726092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 147826092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 147926092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 148026092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 148126092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 148226092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 148326092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 148426092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 148526092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 148626092bf5STheodore Ts'o {Opt_err, 0, 0} 148726092bf5STheodore Ts'o }; 148826092bf5STheodore Ts'o 148926092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 149026092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 149126092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 149226092bf5STheodore Ts'o { 149326092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 149426092bf5STheodore Ts'o const struct mount_opts *m; 149508cefc7aSEric W. Biederman kuid_t uid; 149608cefc7aSEric W. Biederman kgid_t gid; 149726092bf5STheodore Ts'o int arg = 0; 149826092bf5STheodore Ts'o 149957f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 150057f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 150157f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 150257f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 150357f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 150457f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 150557f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 150657f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 150757f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 150857f73c2cSTheodore Ts'o #endif 150926092bf5STheodore Ts'o if (args->from && match_int(args, &arg)) 151026092bf5STheodore Ts'o return -1; 151126092bf5STheodore Ts'o switch (token) { 1512f7048605STheodore Ts'o case Opt_noacl: 1513f7048605STheodore Ts'o case Opt_nouser_xattr: 1514f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1515f7048605STheodore Ts'o break; 151626092bf5STheodore Ts'o case Opt_sb: 151726092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 151826092bf5STheodore Ts'o case Opt_removed: 151926092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 152026092bf5STheodore Ts'o "Ignoring removed %s option", opt); 152126092bf5STheodore Ts'o return 1; 152226092bf5STheodore Ts'o case Opt_resuid: 152308cefc7aSEric W. Biederman uid = make_kuid(current_user_ns(), arg); 152408cefc7aSEric W. Biederman if (!uid_valid(uid)) { 152508cefc7aSEric W. Biederman ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 152608cefc7aSEric W. Biederman return -1; 152708cefc7aSEric W. Biederman } 152808cefc7aSEric W. Biederman sbi->s_resuid = uid; 152926092bf5STheodore Ts'o return 1; 153026092bf5STheodore Ts'o case Opt_resgid: 153108cefc7aSEric W. Biederman gid = make_kgid(current_user_ns(), arg); 153208cefc7aSEric W. Biederman if (!gid_valid(gid)) { 153308cefc7aSEric W. Biederman ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 153408cefc7aSEric W. Biederman return -1; 153508cefc7aSEric W. Biederman } 153608cefc7aSEric W. Biederman sbi->s_resgid = gid; 153726092bf5STheodore Ts'o return 1; 153826092bf5STheodore Ts'o case Opt_abort: 153926092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 154026092bf5STheodore Ts'o return 1; 154126092bf5STheodore Ts'o case Opt_i_version: 154226092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 154326092bf5STheodore Ts'o return 1; 154426092bf5STheodore Ts'o case Opt_journal_dev: 154526092bf5STheodore Ts'o if (is_remount) { 154626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 154726092bf5STheodore Ts'o "Cannot specify journal on remount"); 154826092bf5STheodore Ts'o return -1; 154926092bf5STheodore Ts'o } 155026092bf5STheodore Ts'o *journal_devnum = arg; 155126092bf5STheodore Ts'o return 1; 155226092bf5STheodore Ts'o case Opt_journal_ioprio: 155326092bf5STheodore Ts'o if (arg < 0 || arg > 7) 155426092bf5STheodore Ts'o return -1; 155526092bf5STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 155626092bf5STheodore Ts'o return 1; 155726092bf5STheodore Ts'o } 155826092bf5STheodore Ts'o 155926092bf5STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 156026092bf5STheodore Ts'o if (token != m->token) 156126092bf5STheodore Ts'o continue; 156226092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 156326092bf5STheodore Ts'o return -1; 156426092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 156526092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 156626092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 156726092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 156826092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 156926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 157026092bf5STheodore Ts'o "options when quota turned on"); 157126092bf5STheodore Ts'o return -1; 157226092bf5STheodore Ts'o } 157326092bf5STheodore Ts'o 157426092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 157526092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 157626092bf5STheodore Ts'o } else if (token == Opt_commit) { 157726092bf5STheodore Ts'o if (arg == 0) 157826092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 157926092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 158026092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 158126092bf5STheodore Ts'o if (arg == 0) 158226092bf5STheodore Ts'o arg = EXT4_DEF_MAX_BATCH_TIME; 158326092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 158426092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 158526092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 158626092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 158726092bf5STheodore Ts'o if (arg > (1 << 30)) 158826092bf5STheodore Ts'o return -1; 158926092bf5STheodore Ts'o if (arg && !is_power_of_2(arg)) { 159026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 159126092bf5STheodore Ts'o "EXT4-fs: inode_readahead_blks" 159226092bf5STheodore Ts'o " must be a power of 2"); 159326092bf5STheodore Ts'o return -1; 159426092bf5STheodore Ts'o } 159526092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 159626092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 159726092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 159826092bf5STheodore Ts'o if (!args->from) 159926092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 160026092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 160126092bf5STheodore Ts'o } else if (token == Opt_stripe) { 160226092bf5STheodore Ts'o sbi->s_stripe = arg; 160326092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 160426092bf5STheodore Ts'o if (is_remount) { 160526092bf5STheodore Ts'o if (!sbi->s_journal) 160626092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 160726092bf5STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) != 160826092bf5STheodore Ts'o m->mount_opt) { 160926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 161026092bf5STheodore Ts'o "Cannot change data mode on remount"); 161126092bf5STheodore Ts'o return -1; 161226092bf5STheodore Ts'o } 161326092bf5STheodore Ts'o } else { 161426092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 161526092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 161626092bf5STheodore Ts'o } 161726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 161826092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 161926092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 162026092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 162126092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot " 162226092bf5STheodore Ts'o "change journaled quota options " 162326092bf5STheodore Ts'o "when quota turned on"); 162426092bf5STheodore Ts'o return -1; 162526092bf5STheodore Ts'o } 162626092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 162726092bf5STheodore Ts'o #endif 162826092bf5STheodore Ts'o } else { 162926092bf5STheodore Ts'o if (!args->from) 163026092bf5STheodore Ts'o arg = 1; 163126092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 163226092bf5STheodore Ts'o arg = !arg; 163326092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 163426092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 163526092bf5STheodore Ts'o "buggy handling of option %s", opt); 163626092bf5STheodore Ts'o WARN_ON(1); 163726092bf5STheodore Ts'o return -1; 163826092bf5STheodore Ts'o } 163926092bf5STheodore Ts'o if (arg != 0) 164026092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 164126092bf5STheodore Ts'o else 164226092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 164326092bf5STheodore Ts'o } 164426092bf5STheodore Ts'o return 1; 164526092bf5STheodore Ts'o } 164626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 164726092bf5STheodore Ts'o "or missing value", opt); 164826092bf5STheodore Ts'o return -1; 164926092bf5STheodore Ts'o } 165026092bf5STheodore Ts'o 1651ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1652c3191067STheodore Ts'o unsigned long *journal_devnum, 1653b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1654661aa520SEric Sandeen int is_remount) 1655ac27a0ecSDave Kleikamp { 1656db7e5c66SEldad Zack #ifdef CONFIG_QUOTA 1657617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1658db7e5c66SEldad Zack #endif 1659ac27a0ecSDave Kleikamp char *p; 1660ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 166126092bf5STheodore Ts'o int token; 1662ac27a0ecSDave Kleikamp 1663ac27a0ecSDave Kleikamp if (!options) 1664ac27a0ecSDave Kleikamp return 1; 1665ac27a0ecSDave Kleikamp 1666ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1667ac27a0ecSDave Kleikamp if (!*p) 1668ac27a0ecSDave Kleikamp continue; 166915121c18SEric Sandeen /* 167015121c18SEric Sandeen * Initialize args struct so we know whether arg was 167115121c18SEric Sandeen * found; some options take optional arguments. 167215121c18SEric Sandeen */ 167326092bf5STheodore Ts'o args[0].to = args[0].from = 0; 1674ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 167526092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 167626092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1677ac27a0ecSDave Kleikamp return 0; 1678ac27a0ecSDave Kleikamp } 1679ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1680ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1681482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1682fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1683ac27a0ecSDave Kleikamp 1684482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1685fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1686ac27a0ecSDave Kleikamp 168756c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1688b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1689b31e1552SEric Sandeen "format mixing"); 1690ac27a0ecSDave Kleikamp return 0; 1691ac27a0ecSDave Kleikamp } 1692ac27a0ecSDave Kleikamp 1693ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1694b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1695b31e1552SEric Sandeen "not specified"); 1696ac27a0ecSDave Kleikamp return 0; 1697ac27a0ecSDave Kleikamp } 1698ac27a0ecSDave Kleikamp } else { 1699ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1700b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 17012c8be6b2SJan Kara "specified with no journaling " 1702b31e1552SEric Sandeen "enabled"); 1703ac27a0ecSDave Kleikamp return 0; 1704ac27a0ecSDave Kleikamp } 1705ac27a0ecSDave Kleikamp } 1706ac27a0ecSDave Kleikamp #endif 1707ac27a0ecSDave Kleikamp return 1; 1708ac27a0ecSDave Kleikamp } 1709ac27a0ecSDave Kleikamp 17102adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17112adf6da8STheodore Ts'o struct super_block *sb) 17122adf6da8STheodore Ts'o { 17132adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17142adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17152adf6da8STheodore Ts'o 17162adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17172adf6da8STheodore Ts'o char *fmtname = ""; 17182adf6da8STheodore Ts'o 17192adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17202adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17212adf6da8STheodore Ts'o fmtname = "vfsold"; 17222adf6da8STheodore Ts'o break; 17232adf6da8STheodore Ts'o case QFMT_VFS_V0: 17242adf6da8STheodore Ts'o fmtname = "vfsv0"; 17252adf6da8STheodore Ts'o break; 17262adf6da8STheodore Ts'o case QFMT_VFS_V1: 17272adf6da8STheodore Ts'o fmtname = "vfsv1"; 17282adf6da8STheodore Ts'o break; 17292adf6da8STheodore Ts'o } 17302adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17312adf6da8STheodore Ts'o } 17322adf6da8STheodore Ts'o 17332adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17342adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17352adf6da8STheodore Ts'o 17362adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17372adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17382adf6da8STheodore Ts'o 17392adf6da8STheodore Ts'o if (test_opt(sb, USRQUOTA)) 17402adf6da8STheodore Ts'o seq_puts(seq, ",usrquota"); 17412adf6da8STheodore Ts'o 17422adf6da8STheodore Ts'o if (test_opt(sb, GRPQUOTA)) 17432adf6da8STheodore Ts'o seq_puts(seq, ",grpquota"); 17442adf6da8STheodore Ts'o #endif 17452adf6da8STheodore Ts'o } 17462adf6da8STheodore Ts'o 17475a916be1STheodore Ts'o static const char *token2str(int token) 17485a916be1STheodore Ts'o { 17495a916be1STheodore Ts'o static const struct match_token *t; 17505a916be1STheodore Ts'o 17515a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17525a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17535a916be1STheodore Ts'o break; 17545a916be1STheodore Ts'o return t->pattern; 17555a916be1STheodore Ts'o } 17565a916be1STheodore Ts'o 17572adf6da8STheodore Ts'o /* 17582adf6da8STheodore Ts'o * Show an option if 17592adf6da8STheodore Ts'o * - it's set to a non-default value OR 17602adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17612adf6da8STheodore Ts'o */ 176266acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 176366acdcf4STheodore Ts'o int nodefs) 17642adf6da8STheodore Ts'o { 17652adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17662adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 176766acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17685a916be1STheodore Ts'o const struct mount_opts *m; 176966acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17702adf6da8STheodore Ts'o 177166acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 177266acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17732adf6da8STheodore Ts'o 17742adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17755a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17765a916be1STheodore Ts'o 17775a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17785a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17795a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17805a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17815a916be1STheodore Ts'o continue; 178266acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17835a916be1STheodore Ts'o continue; /* skip if same as the default */ 17845a916be1STheodore Ts'o if ((want_set && 17855a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17865a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17875a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17885a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17895a916be1STheodore Ts'o } 17905a916be1STheodore Ts'o 179108cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17925a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 179308cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 179408cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 179508cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 17965a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 179708cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 179808cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 179966acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 18005a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18015a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18022adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18035a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18042adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18055a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 180666acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18075a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 180866acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18095a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 181066acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18115a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18122adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18135a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 181466acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18155a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 181666acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18172adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18185a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18192adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18205a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18212adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18225a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18235a916be1STheodore Ts'o } 182466acdcf4STheodore Ts'o if (nodefs || 182566acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18265a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18272adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18282adf6da8STheodore Ts'o 182966acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 183066acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18315a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 18322adf6da8STheodore Ts'o 18332adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18342adf6da8STheodore Ts'o return 0; 18352adf6da8STheodore Ts'o } 18362adf6da8STheodore Ts'o 183766acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 183866acdcf4STheodore Ts'o { 183966acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 184066acdcf4STheodore Ts'o } 184166acdcf4STheodore Ts'o 184266acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 184366acdcf4STheodore Ts'o { 184466acdcf4STheodore Ts'o struct super_block *sb = seq->private; 184566acdcf4STheodore Ts'o int rc; 184666acdcf4STheodore Ts'o 184766acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 184866acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 184966acdcf4STheodore Ts'o seq_puts(seq, "\n"); 185066acdcf4STheodore Ts'o return rc; 185166acdcf4STheodore Ts'o } 185266acdcf4STheodore Ts'o 185366acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 185466acdcf4STheodore Ts'o { 185566acdcf4STheodore Ts'o return single_open(file, options_seq_show, PDE(inode)->data); 185666acdcf4STheodore Ts'o } 185766acdcf4STheodore Ts'o 185866acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 185966acdcf4STheodore Ts'o .owner = THIS_MODULE, 186066acdcf4STheodore Ts'o .open = options_open_fs, 186166acdcf4STheodore Ts'o .read = seq_read, 186266acdcf4STheodore Ts'o .llseek = seq_lseek, 186366acdcf4STheodore Ts'o .release = single_release, 186466acdcf4STheodore Ts'o }; 186566acdcf4STheodore Ts'o 1866617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1867ac27a0ecSDave Kleikamp int read_only) 1868ac27a0ecSDave Kleikamp { 1869617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1870ac27a0ecSDave Kleikamp int res = 0; 1871ac27a0ecSDave Kleikamp 1872617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1873b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1874b31e1552SEric Sandeen "forcing read-only mode"); 1875ac27a0ecSDave Kleikamp res = MS_RDONLY; 1876ac27a0ecSDave Kleikamp } 1877ac27a0ecSDave Kleikamp if (read_only) 1878281b5995STheodore Ts'o goto done; 1879617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1880b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1881b31e1552SEric Sandeen "running e2fsck is recommended"); 1882617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1883b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1884b31e1552SEric Sandeen "warning: mounting fs with errors, " 1885b31e1552SEric Sandeen "running e2fsck is recommended"); 1886ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1887ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1888ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1889b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1890b31e1552SEric Sandeen "warning: maximal mount count reached, " 1891b31e1552SEric Sandeen "running e2fsck is recommended"); 1892ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1893ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1894ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1895b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1896b31e1552SEric Sandeen "warning: checktime reached, " 1897b31e1552SEric Sandeen "running e2fsck is recommended"); 18980390131bSFrank Mayhar if (!sbi->s_journal) 1899216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1900ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1901617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1902e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1903ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1904617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19050390131bSFrank Mayhar if (sbi->s_journal) 1906617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1907ac27a0ecSDave Kleikamp 1908e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1909281b5995STheodore Ts'o done: 1910ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1911a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1912a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1913ac27a0ecSDave Kleikamp sb->s_blocksize, 1914ac27a0ecSDave Kleikamp sbi->s_groups_count, 1915617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1916617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1917a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1918ac27a0ecSDave Kleikamp 19197abc52c2SDan Magenheimer cleancache_init_fs(sb); 1920ac27a0ecSDave Kleikamp return res; 1921ac27a0ecSDave Kleikamp } 1922ac27a0ecSDave Kleikamp 1923772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1924772cb7c8SJose R. Santos { 1925772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1926772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1927772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1928772cb7c8SJose R. Santos ext4_group_t flex_group; 1929d50f2ab6SXi Wang unsigned int groups_per_flex = 0; 1930c5ca7c76STheodore Ts'o size_t size; 1931772cb7c8SJose R. Santos int i; 1932772cb7c8SJose R. Santos 1933503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1934d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1935772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1936772cb7c8SJose R. Santos return 1; 1937772cb7c8SJose R. Santos } 1938d50f2ab6SXi Wang groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1939772cb7c8SJose R. Santos 1940c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1941c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1942d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1943d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1944c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 19459933fc0aSTheodore Ts'o sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); 1946c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 19479933fc0aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", 194894de56abSJoe Perches flex_group_count); 1949772cb7c8SJose R. Santos goto failed; 1950772cb7c8SJose R. Santos } 1951772cb7c8SJose R. Santos 1952772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 195388b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1954772cb7c8SJose R. Santos 1955772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19567ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19577ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 1958021b65bbSTheodore Ts'o atomic_add(ext4_free_group_clusters(sb, gdp), 195924aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19607ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19617ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1962772cb7c8SJose R. Santos } 1963772cb7c8SJose R. Santos 1964772cb7c8SJose R. Santos return 1; 1965772cb7c8SJose R. Santos failed: 1966772cb7c8SJose R. Santos return 0; 1967772cb7c8SJose R. Santos } 1968772cb7c8SJose R. Santos 1969feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1970717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1971717d50e4SAndreas Dilger { 1972feb0ab32SDarrick J. Wong int offset; 1973717d50e4SAndreas Dilger __u16 crc = 0; 1974717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1975717d50e4SAndreas Dilger 1976feb0ab32SDarrick J. Wong if ((sbi->s_es->s_feature_ro_compat & 1977feb0ab32SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { 1978feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1979feb0ab32SDarrick J. Wong __u16 old_csum; 1980feb0ab32SDarrick J. Wong __u32 csum32; 1981feb0ab32SDarrick J. Wong 1982feb0ab32SDarrick J. Wong old_csum = gdp->bg_checksum; 1983feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 1984feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 1985feb0ab32SDarrick J. Wong sizeof(le_group)); 1986feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 1987feb0ab32SDarrick J. Wong sbi->s_desc_size); 1988feb0ab32SDarrick J. Wong gdp->bg_checksum = old_csum; 1989feb0ab32SDarrick J. Wong 1990feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 1991feb0ab32SDarrick J. Wong goto out; 1992feb0ab32SDarrick J. Wong } 1993feb0ab32SDarrick J. Wong 1994feb0ab32SDarrick J. Wong /* old crc16 code */ 1995feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 1996feb0ab32SDarrick J. Wong 1997717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1998717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1999717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2000717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2001717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2002717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2003717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2004717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2005717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2006717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2007717d50e4SAndreas Dilger offset); 2008717d50e4SAndreas Dilger 2009feb0ab32SDarrick J. Wong out: 2010717d50e4SAndreas Dilger return cpu_to_le16(crc); 2011717d50e4SAndreas Dilger } 2012717d50e4SAndreas Dilger 2013feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2014717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2015717d50e4SAndreas Dilger { 2016feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2017feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2018feb0ab32SDarrick J. Wong block_group, gdp))) 2019717d50e4SAndreas Dilger return 0; 2020717d50e4SAndreas Dilger 2021717d50e4SAndreas Dilger return 1; 2022717d50e4SAndreas Dilger } 2023717d50e4SAndreas Dilger 2024feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2025feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2026feb0ab32SDarrick J. Wong { 2027feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2028feb0ab32SDarrick J. Wong return; 2029feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2030feb0ab32SDarrick J. Wong } 2031feb0ab32SDarrick J. Wong 2032ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2033bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2034bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2035ac27a0ecSDave Kleikamp { 2036617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2037617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2038617ba13bSMingming Cao ext4_fsblk_t last_block; 2039bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2040bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2041bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2042ce421581SJose R. Santos int flexbg_flag = 0; 2043bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2044ac27a0ecSDave Kleikamp 2045ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2046ce421581SJose R. Santos flexbg_flag = 1; 2047ce421581SJose R. Santos 2048617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2049ac27a0ecSDave Kleikamp 2050197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2051197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2052197cd65aSAkinobu Mita 2053ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2054bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2055ac27a0ecSDave Kleikamp else 2056ac27a0ecSDave Kleikamp last_block = first_block + 2057617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2058ac27a0ecSDave Kleikamp 2059bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2060bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2061bfff6873SLukas Czerner grp = i; 2062bfff6873SLukas Czerner 20638fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20642b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2065b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2066a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2067b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2068ac27a0ecSDave Kleikamp return 0; 2069ac27a0ecSDave Kleikamp } 20708fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20712b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2072b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2073a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2074b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2075ac27a0ecSDave Kleikamp return 0; 2076ac27a0ecSDave Kleikamp } 20778fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2078bd81d8eeSLaurent Vivier if (inode_table < first_block || 20792b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2080b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2081a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2082b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2083ac27a0ecSDave Kleikamp return 0; 2084ac27a0ecSDave Kleikamp } 2085955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2086feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2087b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2088b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2089fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2090fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 20917ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2092955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2093717d50e4SAndreas Dilger return 0; 2094717d50e4SAndreas Dilger } 20957ee1ec4cSLi Zefan } 2096955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2097ce421581SJose R. Santos if (!flexbg_flag) 2098617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2099ac27a0ecSDave Kleikamp } 2100bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2101bfff6873SLukas Czerner *first_not_zeroed = grp; 2102ac27a0ecSDave Kleikamp 21035dee5437STheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 21045dee5437STheodore Ts'o EXT4_C2B(sbi, ext4_count_free_clusters(sb))); 2105617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2106ac27a0ecSDave Kleikamp return 1; 2107ac27a0ecSDave Kleikamp } 2108ac27a0ecSDave Kleikamp 2109617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2110ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2111ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2112ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2113ac27a0ecSDave Kleikamp * 2114ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2115ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2116ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2117ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2118ac27a0ecSDave Kleikamp * 2119ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2120ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2121ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2122617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2123ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2124ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2125ac27a0ecSDave Kleikamp */ 2126617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2127617ba13bSMingming Cao struct ext4_super_block *es) 2128ac27a0ecSDave Kleikamp { 2129ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2130ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2131ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2132ac27a0ecSDave Kleikamp int i; 2133ac27a0ecSDave Kleikamp #endif 2134ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2135ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2136ac27a0ecSDave Kleikamp return; 2137ac27a0ecSDave Kleikamp } 2138ac27a0ecSDave Kleikamp 2139a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2140b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2141b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2142a8f48a95SEric Sandeen return; 2143a8f48a95SEric Sandeen } 2144a8f48a95SEric Sandeen 2145d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2146d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2147d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2148d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2149d39195c3SAmir Goldstein return; 2150d39195c3SAmir Goldstein } 2151d39195c3SAmir Goldstein 2152617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2153ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2154ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2155ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2156ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2157ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2158ac27a0ecSDave Kleikamp return; 2159ac27a0ecSDave Kleikamp } 2160ac27a0ecSDave Kleikamp 2161ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2162b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2163ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2164ac27a0ecSDave Kleikamp } 2165ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2166ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2167ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2168ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2169ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2170617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2171617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2172ac27a0ecSDave Kleikamp if (ret < 0) 2173b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2174b31e1552SEric Sandeen "Cannot turn on journaled " 2175b31e1552SEric Sandeen "quota: error %d", ret); 2176ac27a0ecSDave Kleikamp } 2177ac27a0ecSDave Kleikamp } 2178ac27a0ecSDave Kleikamp #endif 2179ac27a0ecSDave Kleikamp 2180ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2181ac27a0ecSDave Kleikamp struct inode *inode; 2182ac27a0ecSDave Kleikamp 218397bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 218497bd42b9SJosef Bacik if (IS_ERR(inode)) { 2185ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2186ac27a0ecSDave Kleikamp break; 2187ac27a0ecSDave Kleikamp } 2188ac27a0ecSDave Kleikamp 2189617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2190871a2931SChristoph Hellwig dquot_initialize(inode); 2191ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2192b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2193b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 219446e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2195e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2196ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2197617ba13bSMingming Cao ext4_truncate(inode); 2198ac27a0ecSDave Kleikamp nr_truncates++; 2199ac27a0ecSDave Kleikamp } else { 2200b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2201b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 220246e665e9SHarvey Harrison __func__, inode->i_ino); 2203ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2204ac27a0ecSDave Kleikamp inode->i_ino); 2205ac27a0ecSDave Kleikamp nr_orphans++; 2206ac27a0ecSDave Kleikamp } 2207ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2208ac27a0ecSDave Kleikamp } 2209ac27a0ecSDave Kleikamp 2210ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2211ac27a0ecSDave Kleikamp 2212ac27a0ecSDave Kleikamp if (nr_orphans) 2213b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2214b31e1552SEric Sandeen PLURAL(nr_orphans)); 2215ac27a0ecSDave Kleikamp if (nr_truncates) 2216b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2217b31e1552SEric Sandeen PLURAL(nr_truncates)); 2218ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2219ac27a0ecSDave Kleikamp /* Turn quotas off */ 2220ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2221ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2222287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2223ac27a0ecSDave Kleikamp } 2224ac27a0ecSDave Kleikamp #endif 2225ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2226ac27a0ecSDave Kleikamp } 22270b8e58a1SAndreas Dilger 2228cd2291a4SEric Sandeen /* 2229cd2291a4SEric Sandeen * Maximal extent format file size. 2230cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2231cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2232cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2233cd2291a4SEric Sandeen * so that won't be a limiting factor. 2234cd2291a4SEric Sandeen * 2235f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2236f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2237f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2238f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2239f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2240f17722f9SLukas Czerner * 2241cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2242cd2291a4SEric Sandeen */ 2243f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2244cd2291a4SEric Sandeen { 2245cd2291a4SEric Sandeen loff_t res; 2246cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2247cd2291a4SEric Sandeen 2248cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2249f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2250cd2291a4SEric Sandeen /* 225190c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2252cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2253cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2254cd2291a4SEric Sandeen */ 2255cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2256cd2291a4SEric Sandeen 2257cd2291a4SEric Sandeen /* total blocks in file system block size */ 2258cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2259cd2291a4SEric Sandeen upper_limit <<= blkbits; 2260cd2291a4SEric Sandeen } 2261cd2291a4SEric Sandeen 2262f17722f9SLukas Czerner /* 2263f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2264f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2265f17722f9SLukas Czerner * size 2266f17722f9SLukas Czerner */ 2267f17722f9SLukas Czerner res = (1LL << 32) - 1; 2268cd2291a4SEric Sandeen res <<= blkbits; 2269cd2291a4SEric Sandeen 2270cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2271cd2291a4SEric Sandeen if (res > upper_limit) 2272cd2291a4SEric Sandeen res = upper_limit; 2273cd2291a4SEric Sandeen 2274cd2291a4SEric Sandeen return res; 2275cd2291a4SEric Sandeen } 2276ac27a0ecSDave Kleikamp 2277ac27a0ecSDave Kleikamp /* 2278cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22790fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22800fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2281ac27a0ecSDave Kleikamp */ 2282f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2283ac27a0ecSDave Kleikamp { 2284617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22850fc1b451SAneesh Kumar K.V int meta_blocks; 22860fc1b451SAneesh Kumar K.V loff_t upper_limit; 22870b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22880b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22890b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22900b8e58a1SAndreas Dilger * 22910b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22920b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 22930fc1b451SAneesh Kumar K.V */ 22940fc1b451SAneesh Kumar K.V 2295f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 22960fc1b451SAneesh Kumar K.V /* 229790c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 22980b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 22990b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23000fc1b451SAneesh Kumar K.V */ 23010fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23020fc1b451SAneesh Kumar K.V 23030fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23040fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23050fc1b451SAneesh Kumar K.V 23060fc1b451SAneesh Kumar K.V } else { 23078180a562SAneesh Kumar K.V /* 23088180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23098180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23108180a562SAneesh Kumar K.V * represent total number of blocks in 23118180a562SAneesh Kumar K.V * file system block size 23128180a562SAneesh Kumar K.V */ 23130fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23140fc1b451SAneesh Kumar K.V 23150fc1b451SAneesh Kumar K.V } 23160fc1b451SAneesh Kumar K.V 23170fc1b451SAneesh Kumar K.V /* indirect blocks */ 23180fc1b451SAneesh Kumar K.V meta_blocks = 1; 23190fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23200fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23210fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23220fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23230fc1b451SAneesh Kumar K.V 23240fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23250fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2326ac27a0ecSDave Kleikamp 2327ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2328ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2329ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2330ac27a0ecSDave Kleikamp res <<= bits; 2331ac27a0ecSDave Kleikamp if (res > upper_limit) 2332ac27a0ecSDave Kleikamp res = upper_limit; 23330fc1b451SAneesh Kumar K.V 23340fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23350fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23360fc1b451SAneesh Kumar K.V 2337ac27a0ecSDave Kleikamp return res; 2338ac27a0ecSDave Kleikamp } 2339ac27a0ecSDave Kleikamp 2340617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 234170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2342ac27a0ecSDave Kleikamp { 2343617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2344fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2345ac27a0ecSDave Kleikamp int has_super = 0; 2346ac27a0ecSDave Kleikamp 2347ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2348ac27a0ecSDave Kleikamp 2349617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2350ac27a0ecSDave Kleikamp nr < first_meta_bg) 235170bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2352ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2353617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2354ac27a0ecSDave Kleikamp has_super = 1; 23550b8e58a1SAndreas Dilger 2356617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2357ac27a0ecSDave Kleikamp } 2358ac27a0ecSDave Kleikamp 2359c9de560dSAlex Tomas /** 2360c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2361c9de560dSAlex Tomas * @sbi: In memory super block info 2362c9de560dSAlex Tomas * 2363c9de560dSAlex Tomas * If we have specified it via mount option, then 2364c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2365c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2366c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2367c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2368c9de560dSAlex Tomas * 2369c9de560dSAlex Tomas */ 2370c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2371c9de560dSAlex Tomas { 2372c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2373c9de560dSAlex Tomas unsigned long stripe_width = 2374c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 23753eb08658SDan Ehrenberg int ret; 2376c9de560dSAlex Tomas 2377c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 23783eb08658SDan Ehrenberg ret = sbi->s_stripe; 23793eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 23803eb08658SDan Ehrenberg ret = stripe_width; 23813eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 23823eb08658SDan Ehrenberg ret = stride; 23833eb08658SDan Ehrenberg else 23843eb08658SDan Ehrenberg ret = 0; 2385c9de560dSAlex Tomas 23863eb08658SDan Ehrenberg /* 23873eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 23883eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 23893eb08658SDan Ehrenberg */ 23903eb08658SDan Ehrenberg if (ret <= 1) 23913eb08658SDan Ehrenberg ret = 0; 2392c9de560dSAlex Tomas 23933eb08658SDan Ehrenberg return ret; 2394c9de560dSAlex Tomas } 2395ac27a0ecSDave Kleikamp 23963197ebdbSTheodore Ts'o /* sysfs supprt */ 23973197ebdbSTheodore Ts'o 23983197ebdbSTheodore Ts'o struct ext4_attr { 23993197ebdbSTheodore Ts'o struct attribute attr; 24003197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24013197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24023197ebdbSTheodore Ts'o const char *, size_t); 24033197ebdbSTheodore Ts'o int offset; 24043197ebdbSTheodore Ts'o }; 24053197ebdbSTheodore Ts'o 24063197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 24073197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 24083197ebdbSTheodore Ts'o { 24093197ebdbSTheodore Ts'o char *endp; 24103197ebdbSTheodore Ts'o 2411e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2412e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 24133197ebdbSTheodore Ts'o if (*endp || *value > max) 24143197ebdbSTheodore Ts'o return -EINVAL; 24153197ebdbSTheodore Ts'o 24163197ebdbSTheodore Ts'o return 0; 24173197ebdbSTheodore Ts'o } 24183197ebdbSTheodore Ts'o 24193197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24203197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24213197ebdbSTheodore Ts'o char *buf) 24223197ebdbSTheodore Ts'o { 24233197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24247b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24257b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24263197ebdbSTheodore Ts'o } 24273197ebdbSTheodore Ts'o 24283197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24293197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24303197ebdbSTheodore Ts'o { 24313197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24323197ebdbSTheodore Ts'o 2433f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2434f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24353197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24363197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24373197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24383197ebdbSTheodore Ts'o } 24393197ebdbSTheodore Ts'o 24403197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24413197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24423197ebdbSTheodore Ts'o { 24433197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24443197ebdbSTheodore Ts'o 2445f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2446f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24473197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2448a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24493197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2450a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24513197ebdbSTheodore Ts'o } 24523197ebdbSTheodore Ts'o 24533197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24543197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24553197ebdbSTheodore Ts'o const char *buf, size_t count) 24563197ebdbSTheodore Ts'o { 24573197ebdbSTheodore Ts'o unsigned long t; 24583197ebdbSTheodore Ts'o 24593197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 24603197ebdbSTheodore Ts'o return -EINVAL; 24613197ebdbSTheodore Ts'o 24625dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 24633197ebdbSTheodore Ts'o return -EINVAL; 24643197ebdbSTheodore Ts'o 24653197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24663197ebdbSTheodore Ts'o return count; 24673197ebdbSTheodore Ts'o } 24683197ebdbSTheodore Ts'o 24693197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24703197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24713197ebdbSTheodore Ts'o { 24723197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24733197ebdbSTheodore Ts'o 24743197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24753197ebdbSTheodore Ts'o } 24763197ebdbSTheodore Ts'o 24773197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 24783197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24793197ebdbSTheodore Ts'o const char *buf, size_t count) 24803197ebdbSTheodore Ts'o { 24813197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24823197ebdbSTheodore Ts'o unsigned long t; 24833197ebdbSTheodore Ts'o 24843197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24853197ebdbSTheodore Ts'o return -EINVAL; 24863197ebdbSTheodore Ts'o *ui = t; 24873197ebdbSTheodore Ts'o return count; 24883197ebdbSTheodore Ts'o } 24893197ebdbSTheodore Ts'o 24902c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 24912c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 24922c0544b2STheodore Ts'o const char *buf, size_t count) 24932c0544b2STheodore Ts'o { 24942c0544b2STheodore Ts'o int len = count; 24952c0544b2STheodore Ts'o 24962c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 24972c0544b2STheodore Ts'o return -EPERM; 24982c0544b2STheodore Ts'o 24992c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25002c0544b2STheodore Ts'o len--; 25012c0544b2STheodore Ts'o 25022c0544b2STheodore Ts'o if (len) 25032c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25042c0544b2STheodore Ts'o return count; 25052c0544b2STheodore Ts'o } 25062c0544b2STheodore Ts'o 25073197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25083197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25093197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25103197ebdbSTheodore Ts'o .show = _show, \ 25113197ebdbSTheodore Ts'o .store = _store, \ 25123197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 25133197ebdbSTheodore Ts'o } 25143197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25153197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 25163197ebdbSTheodore Ts'o 2517857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 25183197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 25193197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 25203197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 25213197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 25223197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 25233197ebdbSTheodore Ts'o 25243197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 25253197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 25263197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 25273197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 25283197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 252911013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 25303197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 25313197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 25323197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 25333197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 25343197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 25353197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 253655138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 25372c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 25383197ebdbSTheodore Ts'o 25393197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 25403197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 25413197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 25423197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 25433197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 254411013911SAndreas Dilger ATTR_LIST(inode_goal), 25453197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 25463197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 25473197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 25483197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 25493197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 25503197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 255155138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 25522c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 25533197ebdbSTheodore Ts'o NULL, 25543197ebdbSTheodore Ts'o }; 25553197ebdbSTheodore Ts'o 2556857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2557857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 255827ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2559857ac889SLukas Czerner 2560857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2561857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 256227ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2563857ac889SLukas Czerner NULL, 2564857ac889SLukas Czerner }; 2565857ac889SLukas Czerner 25663197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 25673197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 25683197ebdbSTheodore Ts'o { 25693197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25703197ebdbSTheodore Ts'o s_kobj); 25713197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25723197ebdbSTheodore Ts'o 25733197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 25743197ebdbSTheodore Ts'o } 25753197ebdbSTheodore Ts'o 25763197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 25773197ebdbSTheodore Ts'o struct attribute *attr, 25783197ebdbSTheodore Ts'o const char *buf, size_t len) 25793197ebdbSTheodore Ts'o { 25803197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25813197ebdbSTheodore Ts'o s_kobj); 25823197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25833197ebdbSTheodore Ts'o 25843197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 25853197ebdbSTheodore Ts'o } 25863197ebdbSTheodore Ts'o 25873197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 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 complete(&sbi->s_kobj_unregister); 25923197ebdbSTheodore Ts'o } 25933197ebdbSTheodore Ts'o 259452cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 25953197ebdbSTheodore Ts'o .show = ext4_attr_show, 25963197ebdbSTheodore Ts'o .store = ext4_attr_store, 25973197ebdbSTheodore Ts'o }; 25983197ebdbSTheodore Ts'o 25993197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 26003197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 26013197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 26023197ebdbSTheodore Ts'o .release = ext4_sb_release, 26033197ebdbSTheodore Ts'o }; 26043197ebdbSTheodore Ts'o 2605857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2606857ac889SLukas Czerner { 2607857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2608857ac889SLukas Czerner } 2609857ac889SLukas Czerner 2610857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2611857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2612857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2613857ac889SLukas Czerner .release = ext4_feat_release, 2614857ac889SLukas Czerner }; 2615857ac889SLukas Czerner 2616a13fb1a4SEric Sandeen /* 2617a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2618a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2619a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2620a13fb1a4SEric Sandeen * 0 if it cannot be. 2621a13fb1a4SEric Sandeen */ 2622a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2623a13fb1a4SEric Sandeen { 2624a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2625a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2626a13fb1a4SEric Sandeen "Couldn't mount because of " 2627a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2628a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2629a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2630a13fb1a4SEric Sandeen return 0; 2631a13fb1a4SEric Sandeen } 2632a13fb1a4SEric Sandeen 2633a13fb1a4SEric Sandeen if (readonly) 2634a13fb1a4SEric Sandeen return 1; 2635a13fb1a4SEric Sandeen 2636a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2637a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2638a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2639a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2640a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2641a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2642a13fb1a4SEric Sandeen return 0; 2643a13fb1a4SEric Sandeen } 2644a13fb1a4SEric Sandeen /* 2645a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2646a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2647a13fb1a4SEric Sandeen */ 2648a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2649a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2650a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2651a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2652a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2653a13fb1a4SEric Sandeen return 0; 2654a13fb1a4SEric Sandeen } 2655a13fb1a4SEric Sandeen } 2656bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2657bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2658bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2659bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2660bab08ab9STheodore Ts'o "extents feature\n"); 2661bab08ab9STheodore Ts'o return 0; 2662bab08ab9STheodore Ts'o } 26637c319d32SAditya Kali 26647c319d32SAditya Kali #ifndef CONFIG_QUOTA 26657c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 26667c319d32SAditya Kali !readonly) { 26677c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 26687c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 26697c319d32SAditya Kali "without CONFIG_QUOTA"); 26707c319d32SAditya Kali return 0; 26717c319d32SAditya Kali } 26727c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2673a13fb1a4SEric Sandeen return 1; 2674a13fb1a4SEric Sandeen } 2675a13fb1a4SEric Sandeen 267666e61a9eSTheodore Ts'o /* 267766e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 267866e61a9eSTheodore Ts'o * on the file system 267966e61a9eSTheodore Ts'o */ 268066e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 268166e61a9eSTheodore Ts'o { 268266e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 268366e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 268466e61a9eSTheodore Ts'o struct ext4_super_block *es; 268566e61a9eSTheodore Ts'o 268666e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 268766e61a9eSTheodore Ts'o es = sbi->s_es; 268866e61a9eSTheodore Ts'o 268966e61a9eSTheodore Ts'o if (es->s_error_count) 269066e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 269166e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 269266e61a9eSTheodore Ts'o if (es->s_first_error_time) { 269366e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 269466e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 269566e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 269666e61a9eSTheodore Ts'o es->s_first_error_func, 269766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 269866e61a9eSTheodore Ts'o if (es->s_first_error_ino) 269966e61a9eSTheodore Ts'o printk(": inode %u", 270066e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 270166e61a9eSTheodore Ts'o if (es->s_first_error_block) 270266e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 270366e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 270466e61a9eSTheodore Ts'o printk("\n"); 270566e61a9eSTheodore Ts'o } 270666e61a9eSTheodore Ts'o if (es->s_last_error_time) { 270766e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 270866e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 270966e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 271066e61a9eSTheodore Ts'o es->s_last_error_func, 271166e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 271266e61a9eSTheodore Ts'o if (es->s_last_error_ino) 271366e61a9eSTheodore Ts'o printk(": inode %u", 271466e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 271566e61a9eSTheodore Ts'o if (es->s_last_error_block) 271666e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 271766e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 271866e61a9eSTheodore Ts'o printk("\n"); 271966e61a9eSTheodore Ts'o } 272066e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 272166e61a9eSTheodore Ts'o } 272266e61a9eSTheodore Ts'o 2723bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2724bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2725bfff6873SLukas Czerner { 2726bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2727bfff6873SLukas Czerner ext4_group_t group, ngroups; 2728bfff6873SLukas Czerner struct super_block *sb; 2729bfff6873SLukas Czerner unsigned long timeout = 0; 2730bfff6873SLukas Czerner int ret = 0; 2731bfff6873SLukas Czerner 2732bfff6873SLukas Czerner sb = elr->lr_super; 2733bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2734bfff6873SLukas Czerner 27358e8ad8a5SJan Kara sb_start_write(sb); 2736bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2737bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2738bfff6873SLukas Czerner if (!gdp) { 2739bfff6873SLukas Czerner ret = 1; 2740bfff6873SLukas Czerner break; 2741bfff6873SLukas Czerner } 2742bfff6873SLukas Czerner 2743bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2744bfff6873SLukas Czerner break; 2745bfff6873SLukas Czerner } 2746bfff6873SLukas Czerner 2747bfff6873SLukas Czerner if (group == ngroups) 2748bfff6873SLukas Czerner ret = 1; 2749bfff6873SLukas Czerner 2750bfff6873SLukas Czerner if (!ret) { 2751bfff6873SLukas Czerner timeout = jiffies; 2752bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2753bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2754bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 275551ce6511SLukas Czerner timeout = (jiffies - timeout) * 275651ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2757bfff6873SLukas Czerner elr->lr_timeout = timeout; 2758bfff6873SLukas Czerner } 2759bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2760bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2761bfff6873SLukas Czerner } 27628e8ad8a5SJan Kara sb_end_write(sb); 2763bfff6873SLukas Czerner 2764bfff6873SLukas Czerner return ret; 2765bfff6873SLukas Czerner } 2766bfff6873SLukas Czerner 2767bfff6873SLukas Czerner /* 2768bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 27694ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2770bfff6873SLukas Czerner */ 2771bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2772bfff6873SLukas Czerner { 2773bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2774bfff6873SLukas Czerner 2775bfff6873SLukas Czerner if (!elr) 2776bfff6873SLukas Czerner return; 2777bfff6873SLukas Czerner 2778bfff6873SLukas Czerner sbi = elr->lr_sbi; 2779bfff6873SLukas Czerner 2780bfff6873SLukas Czerner list_del(&elr->lr_request); 2781bfff6873SLukas Czerner sbi->s_li_request = NULL; 2782bfff6873SLukas Czerner kfree(elr); 2783bfff6873SLukas Czerner } 2784bfff6873SLukas Czerner 2785bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2786bfff6873SLukas Czerner { 27871bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 27881bb933fbSLukas Czerner if (!ext4_li_info) { 27891bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2790bfff6873SLukas Czerner return; 27911bb933fbSLukas Czerner } 2792bfff6873SLukas Czerner 2793bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 27941bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2795bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 27961bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2797bfff6873SLukas Czerner } 2798bfff6873SLukas Czerner 27998f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 28008f1f7453SEric Sandeen 2801bfff6873SLukas Czerner /* 2802bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2803bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2804bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2805bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2806bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2807bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2808bfff6873SLukas Czerner * next waking time and put itself into sleep. 2809bfff6873SLukas Czerner */ 2810bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2811bfff6873SLukas Czerner { 2812bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2813bfff6873SLukas Czerner struct list_head *pos, *n; 2814bfff6873SLukas Czerner struct ext4_li_request *elr; 28154ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2816bfff6873SLukas Czerner 2817bfff6873SLukas Czerner BUG_ON(NULL == eli); 2818bfff6873SLukas Czerner 2819bfff6873SLukas Czerner cont_thread: 2820bfff6873SLukas Czerner while (true) { 2821bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2822bfff6873SLukas Czerner 2823bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2824bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2825bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2826bfff6873SLukas Czerner goto exit_thread; 2827bfff6873SLukas Czerner } 2828bfff6873SLukas Czerner 2829bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2830bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2831bfff6873SLukas Czerner lr_request); 2832bfff6873SLukas Czerner 2833b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2834b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2835b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2836bfff6873SLukas Czerner ext4_remove_li_request(elr); 2837bfff6873SLukas Czerner continue; 2838bfff6873SLukas Czerner } 2839b2c78cd0STheodore Ts'o } 2840bfff6873SLukas Czerner 2841bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2842bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2843bfff6873SLukas Czerner } 2844bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2845bfff6873SLukas Czerner 2846a0acae0eSTejun Heo try_to_freeze(); 2847bfff6873SLukas Czerner 28484ed5c033SLukas Czerner cur = jiffies; 28494ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2850f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2851bfff6873SLukas Czerner cond_resched(); 2852bfff6873SLukas Czerner continue; 2853bfff6873SLukas Czerner } 2854bfff6873SLukas Czerner 28554ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 28564ed5c033SLukas Czerner 28578f1f7453SEric Sandeen if (kthread_should_stop()) { 28588f1f7453SEric Sandeen ext4_clear_request_list(); 28598f1f7453SEric Sandeen goto exit_thread; 28608f1f7453SEric Sandeen } 2861bfff6873SLukas Czerner } 2862bfff6873SLukas Czerner 2863bfff6873SLukas Czerner exit_thread: 2864bfff6873SLukas Czerner /* 2865bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2866bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2867bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2868bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2869bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2870bfff6873SLukas Czerner * new one. 2871bfff6873SLukas Czerner */ 2872bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2873bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2874bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2875bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2876bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2877bfff6873SLukas Czerner goto cont_thread; 2878bfff6873SLukas Czerner } 2879bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2880bfff6873SLukas Czerner kfree(ext4_li_info); 2881bfff6873SLukas Czerner ext4_li_info = NULL; 2882bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2883bfff6873SLukas Czerner 2884bfff6873SLukas Czerner return 0; 2885bfff6873SLukas Czerner } 2886bfff6873SLukas Czerner 2887bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2888bfff6873SLukas Czerner { 2889bfff6873SLukas Czerner struct list_head *pos, *n; 2890bfff6873SLukas Czerner struct ext4_li_request *elr; 2891bfff6873SLukas Czerner 2892bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2893bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2894bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2895bfff6873SLukas Czerner lr_request); 2896bfff6873SLukas Czerner ext4_remove_li_request(elr); 2897bfff6873SLukas Czerner } 2898bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2899bfff6873SLukas Czerner } 2900bfff6873SLukas Czerner 2901bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2902bfff6873SLukas Czerner { 29038f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 29048f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 29058f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 29068f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2907bfff6873SLukas Czerner ext4_clear_request_list(); 2908bfff6873SLukas Czerner kfree(ext4_li_info); 2909bfff6873SLukas Czerner ext4_li_info = NULL; 291092b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2911bfff6873SLukas Czerner "initialization thread\n", 2912bfff6873SLukas Czerner err); 2913bfff6873SLukas Czerner return err; 2914bfff6873SLukas Czerner } 2915bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2916bfff6873SLukas Czerner return 0; 2917bfff6873SLukas Czerner } 2918bfff6873SLukas Czerner 2919bfff6873SLukas Czerner /* 2920bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2921bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2922bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2923bfff6873SLukas Czerner * groups and return total number of groups. 2924bfff6873SLukas Czerner */ 2925bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2926bfff6873SLukas Czerner { 2927bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2928bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2929bfff6873SLukas Czerner 2930bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2931bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2932bfff6873SLukas Czerner if (!gdp) 2933bfff6873SLukas Czerner continue; 2934bfff6873SLukas Czerner 2935bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2936bfff6873SLukas Czerner break; 2937bfff6873SLukas Czerner } 2938bfff6873SLukas Czerner 2939bfff6873SLukas Czerner return group; 2940bfff6873SLukas Czerner } 2941bfff6873SLukas Czerner 2942bfff6873SLukas Czerner static int ext4_li_info_new(void) 2943bfff6873SLukas Czerner { 2944bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2945bfff6873SLukas Czerner 2946bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2947bfff6873SLukas Czerner if (!eli) 2948bfff6873SLukas Czerner return -ENOMEM; 2949bfff6873SLukas Czerner 2950bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2951bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2952bfff6873SLukas Czerner 2953bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2954bfff6873SLukas Czerner 2955bfff6873SLukas Czerner ext4_li_info = eli; 2956bfff6873SLukas Czerner 2957bfff6873SLukas Czerner return 0; 2958bfff6873SLukas Czerner } 2959bfff6873SLukas Czerner 2960bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2961bfff6873SLukas Czerner ext4_group_t start) 2962bfff6873SLukas Czerner { 2963bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2964bfff6873SLukas Czerner struct ext4_li_request *elr; 2965bfff6873SLukas Czerner unsigned long rnd; 2966bfff6873SLukas Czerner 2967bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2968bfff6873SLukas Czerner if (!elr) 2969bfff6873SLukas Czerner return NULL; 2970bfff6873SLukas Czerner 2971bfff6873SLukas Czerner elr->lr_super = sb; 2972bfff6873SLukas Czerner elr->lr_sbi = sbi; 2973bfff6873SLukas Czerner elr->lr_next_group = start; 2974bfff6873SLukas Czerner 2975bfff6873SLukas Czerner /* 2976bfff6873SLukas Czerner * Randomize first schedule time of the request to 2977bfff6873SLukas Czerner * spread the inode table initialization requests 2978bfff6873SLukas Czerner * better. 2979bfff6873SLukas Czerner */ 2980bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2981bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2982bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2983bfff6873SLukas Czerner 2984bfff6873SLukas Czerner return elr; 2985bfff6873SLukas Czerner } 2986bfff6873SLukas Czerner 2987bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 2988bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2989bfff6873SLukas Czerner { 2990bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2991bfff6873SLukas Czerner struct ext4_li_request *elr; 2992bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 29936c5a6cb9SAndrew Morton int ret = 0; 2994bfff6873SLukas Czerner 299551ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 299651ce6511SLukas Czerner /* 299751ce6511SLukas Czerner * Reset timeout so it can be computed again, because 299851ce6511SLukas Czerner * s_li_wait_mult might have changed. 299951ce6511SLukas Czerner */ 300051ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 3001beed5ecbSNicolas Kaiser return 0; 300251ce6511SLukas Czerner } 3003bfff6873SLukas Czerner 3004bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3005bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 300655ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 3007beed5ecbSNicolas Kaiser return 0; 3008bfff6873SLukas Czerner 3009bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 3010beed5ecbSNicolas Kaiser if (!elr) 3011beed5ecbSNicolas Kaiser return -ENOMEM; 3012bfff6873SLukas Czerner 3013bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3014bfff6873SLukas Czerner 3015bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3016bfff6873SLukas Czerner ret = ext4_li_info_new(); 3017bfff6873SLukas Czerner if (ret) 3018bfff6873SLukas Czerner goto out; 3019bfff6873SLukas Czerner } 3020bfff6873SLukas Czerner 3021bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3022bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3023bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3024bfff6873SLukas Czerner 3025bfff6873SLukas Czerner sbi->s_li_request = elr; 302646e4690bSTao Ma /* 302746e4690bSTao Ma * set elr to NULL here since it has been inserted to 302846e4690bSTao Ma * the request_list and the removal and free of it is 302946e4690bSTao Ma * handled by ext4_clear_request_list from now on. 303046e4690bSTao Ma */ 303146e4690bSTao Ma elr = NULL; 3032bfff6873SLukas Czerner 3033bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3034bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3035bfff6873SLukas Czerner if (ret) 3036bfff6873SLukas Czerner goto out; 3037bfff6873SLukas Czerner } 3038bfff6873SLukas Czerner out: 3039bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3040beed5ecbSNicolas Kaiser if (ret) 3041bfff6873SLukas Czerner kfree(elr); 3042bfff6873SLukas Czerner return ret; 3043bfff6873SLukas Czerner } 3044bfff6873SLukas Czerner 3045bfff6873SLukas Czerner /* 3046bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3047bfff6873SLukas Czerner * module unload. 3048bfff6873SLukas Czerner */ 3049bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3050bfff6873SLukas Czerner { 3051bfff6873SLukas Czerner /* 3052bfff6873SLukas Czerner * If thread exited earlier 3053bfff6873SLukas Czerner * there's nothing to be done. 3054bfff6873SLukas Czerner */ 30558f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3056bfff6873SLukas Czerner return; 3057bfff6873SLukas Czerner 30588f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3059bfff6873SLukas Czerner } 3060bfff6873SLukas Czerner 306125ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 306225ed6e8aSDarrick J. Wong { 306325ed6e8aSDarrick J. Wong int ret = 1; 306425ed6e8aSDarrick J. Wong int compat, incompat; 306525ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 306625ed6e8aSDarrick J. Wong 306725ed6e8aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 306825ed6e8aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 306925ed6e8aSDarrick J. Wong /* journal checksum v2 */ 307025ed6e8aSDarrick J. Wong compat = 0; 307125ed6e8aSDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V2; 307225ed6e8aSDarrick J. Wong } else { 307325ed6e8aSDarrick J. Wong /* journal checksum v1 */ 307425ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 307525ed6e8aSDarrick J. Wong incompat = 0; 307625ed6e8aSDarrick J. Wong } 307725ed6e8aSDarrick J. Wong 307825ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 307925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 308025ed6e8aSDarrick J. Wong compat, 0, 308125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 308225ed6e8aSDarrick J. Wong incompat); 308325ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 308425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 308525ed6e8aSDarrick J. Wong compat, 0, 308625ed6e8aSDarrick J. Wong incompat); 308725ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 308825ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 308925ed6e8aSDarrick J. Wong } else { 309025ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 309125ed6e8aSDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 309225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 309325ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 309425ed6e8aSDarrick J. Wong } 309525ed6e8aSDarrick J. Wong 309625ed6e8aSDarrick J. Wong return ret; 309725ed6e8aSDarrick J. Wong } 309825ed6e8aSDarrick J. Wong 3099952fc18eSTheodore Ts'o /* 3100952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3101952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3102952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3103952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3104952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3105952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3106952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3107952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3108952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3109952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3110952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3111952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3112952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3113952fc18eSTheodore Ts'o */ 3114952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3115952fc18eSTheodore Ts'o char *buf) 3116952fc18eSTheodore Ts'o { 3117952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3118952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3119952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3120952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3121952fc18eSTheodore Ts'o int s, j, count = 0; 3122952fc18eSTheodore Ts'o 3123*0548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 3124*0548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 3125*0548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 3126*0548bbb8STheodore Ts'o 3127952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3128952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3129952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3130952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3131952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3132952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3133952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3134952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3135952fc18eSTheodore Ts'o count++; 3136952fc18eSTheodore Ts'o } 3137952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3138952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3139952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3140952fc18eSTheodore Ts'o count++; 3141952fc18eSTheodore Ts'o } 3142952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3143952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3144952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3145952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3146952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3147952fc18eSTheodore Ts'o count++; 3148952fc18eSTheodore Ts'o } 3149952fc18eSTheodore Ts'o if (i != grp) 3150952fc18eSTheodore Ts'o continue; 3151952fc18eSTheodore Ts'o s = 0; 3152952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3153952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3154952fc18eSTheodore Ts'o count++; 3155952fc18eSTheodore Ts'o } 3156952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3157952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3158952fc18eSTheodore Ts'o count++; 3159952fc18eSTheodore Ts'o } 3160952fc18eSTheodore Ts'o } 3161952fc18eSTheodore Ts'o if (!count) 3162952fc18eSTheodore Ts'o return 0; 3163952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3164952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3165952fc18eSTheodore Ts'o } 3166952fc18eSTheodore Ts'o 3167952fc18eSTheodore Ts'o /* 3168952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3169952fc18eSTheodore Ts'o */ 3170952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3171952fc18eSTheodore Ts'o { 3172952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3173952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3174952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3175952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3176952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3177952fc18eSTheodore Ts'o 3178952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3179952fc18eSTheodore Ts'o if (!buf) 3180952fc18eSTheodore Ts'o return -ENOMEM; 3181952fc18eSTheodore Ts'o 3182952fc18eSTheodore Ts'o /* 3183952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3184952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3185952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3186952fc18eSTheodore Ts'o */ 3187952fc18eSTheodore Ts'o 3188952fc18eSTheodore Ts'o /* 3189952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3190952fc18eSTheodore Ts'o */ 3191952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3192952fc18eSTheodore Ts'o 3193952fc18eSTheodore Ts'o /* 3194952fc18eSTheodore Ts'o * Add the overhead found in each block group 3195952fc18eSTheodore Ts'o */ 3196952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3197952fc18eSTheodore Ts'o int blks; 3198952fc18eSTheodore Ts'o 3199952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3200952fc18eSTheodore Ts'o overhead += blks; 3201952fc18eSTheodore Ts'o if (blks) 3202952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3203952fc18eSTheodore Ts'o cond_resched(); 3204952fc18eSTheodore Ts'o } 3205952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3206952fc18eSTheodore Ts'o smp_wmb(); 3207952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3208952fc18eSTheodore Ts'o return 0; 3209952fc18eSTheodore Ts'o } 3210952fc18eSTheodore Ts'o 3211617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3212ac27a0ecSDave Kleikamp { 3213d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3214ac27a0ecSDave Kleikamp struct buffer_head *bh; 3215617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3216617ba13bSMingming Cao struct ext4_sb_info *sbi; 3217617ba13bSMingming Cao ext4_fsblk_t block; 3218617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 321970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3220ac27a0ecSDave Kleikamp unsigned long offset = 0; 3221ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3222ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3223ac27a0ecSDave Kleikamp struct inode *root; 32249f6200bbSTheodore Ts'o char *cp; 32250390131bSFrank Mayhar const char *descr; 3226dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3227281b5995STheodore Ts'o int blocksize, clustersize; 32284ec11028STheodore Ts'o unsigned int db_count; 32294ec11028STheodore Ts'o unsigned int i; 3230281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3231bd81d8eeSLaurent Vivier __u64 blocks_count; 3232833f4077SPeter Zijlstra int err; 3233b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3234bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3235ac27a0ecSDave Kleikamp 3236ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3237ac27a0ecSDave Kleikamp if (!sbi) 3238dcc7dae3SCyrill Gorcunov goto out_free_orig; 3239705895b6SPekka Enberg 3240705895b6SPekka Enberg sbi->s_blockgroup_lock = 3241705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3242705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3243705895b6SPekka Enberg kfree(sbi); 3244dcc7dae3SCyrill Gorcunov goto out_free_orig; 3245705895b6SPekka Enberg } 3246ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 32472c0544b2STheodore Ts'o sbi->s_sb = sb; 3248ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 324908cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, EXT4_DEF_RESUID); 325008cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, EXT4_DEF_RESGID); 3251240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3252d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3253f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3254f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3255f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3256ac27a0ecSDave Kleikamp 32579f6200bbSTheodore Ts'o /* Cleanup superblock name */ 32589f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 32599f6200bbSTheodore Ts'o *cp = '!'; 32609f6200bbSTheodore Ts'o 3261dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3262617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3263ac27a0ecSDave Kleikamp if (!blocksize) { 3264b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3265ac27a0ecSDave Kleikamp goto out_fail; 3266ac27a0ecSDave Kleikamp } 3267ac27a0ecSDave Kleikamp 3268ac27a0ecSDave Kleikamp /* 3269617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3270ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3271ac27a0ecSDave Kleikamp */ 3272617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 327370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 327470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3275ac27a0ecSDave Kleikamp } else { 327670bbb3e0SAndrew Morton logical_sb_block = sb_block; 3277ac27a0ecSDave Kleikamp } 3278ac27a0ecSDave Kleikamp 327970bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3280b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3281ac27a0ecSDave Kleikamp goto out_fail; 3282ac27a0ecSDave Kleikamp } 3283ac27a0ecSDave Kleikamp /* 3284ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3285617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3286ac27a0ecSDave Kleikamp */ 32872716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3288ac27a0ecSDave Kleikamp sbi->s_es = es; 3289ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3290617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3291617ba13bSMingming Cao goto cantfind_ext4; 3292afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3293ac27a0ecSDave Kleikamp 3294feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3295feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3296feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3297feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3298feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3299feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3300feb0ab32SDarrick J. Wong 3301d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3302d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3303d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3304d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3305d25425f8SDarrick J. Wong silent = 1; 3306d25425f8SDarrick J. Wong goto cantfind_ext4; 3307d25425f8SDarrick J. Wong } 3308d25425f8SDarrick J. Wong 33090441984aSDarrick J. Wong /* Load the checksum driver */ 33100441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 33110441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 33120441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 33130441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 33140441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 33150441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 33160441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 33170441984aSDarrick J. Wong goto failed_mount; 33180441984aSDarrick J. Wong } 33190441984aSDarrick J. Wong } 33200441984aSDarrick J. Wong 3321a9c47317SDarrick J. Wong /* Check superblock checksum */ 3322a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3323a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3324a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3325a9c47317SDarrick J. Wong silent = 1; 3326a9c47317SDarrick J. Wong goto cantfind_ext4; 3327a9c47317SDarrick J. Wong } 3328a9c47317SDarrick J. Wong 3329a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3330a9c47317SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3331a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 3332a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3333a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3334a9c47317SDarrick J. Wong 3335ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3336ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3337fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3338617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3339fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 334087f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3341fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3342617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3343fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3344ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 334503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3346fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 33472e7842b8SHugh Dickins #endif 334803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3349fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 33502e7842b8SHugh Dickins #endif 33516fd7a467STheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 3352617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3353fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3354617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3355fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3356617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3357fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3358ac27a0ecSDave Kleikamp 3359617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3360fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3361bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3362fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3363bb4f397aSAneesh Kumar K.V else 3364fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 33658b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3366fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 33678b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3368fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3369ac27a0ecSDave Kleikamp 337008cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 337108cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 337230773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 337330773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 337430773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3375ac27a0ecSDave Kleikamp 33768b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3377fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3378ac27a0ecSDave Kleikamp 33791e2462f9SMingming Cao /* 3380dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3381dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3382dd919b98SAneesh Kumar K.V */ 33838b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 33848b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3385fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3386dd919b98SAneesh Kumar K.V 338751ce6511SLukas Czerner /* 338851ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 338951ce6511SLukas Czerner * no mount option specified. 339051ce6511SLukas Czerner */ 339151ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 339251ce6511SLukas Czerner 33938b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3394661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 33958b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 33968b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 33978b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 33988b67f04aSTheodore Ts'o } 33995a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3400b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3401661aa520SEric Sandeen &journal_ioprio, 0)) 3402ac27a0ecSDave Kleikamp goto failed_mount; 3403ac27a0ecSDave Kleikamp 340456889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 340556889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 340656889787STheodore Ts'o "with data=journal disables delayed " 340756889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 340856889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 340956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 341056889787STheodore Ts'o "both data=journal and delalloc"); 341156889787STheodore Ts'o goto failed_mount; 341256889787STheodore Ts'o } 341356889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 341456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 341556889787STheodore Ts'o "both data=journal and delalloc"); 341656889787STheodore Ts'o goto failed_mount; 341756889787STheodore Ts'o } 341856889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 341956889787STheodore Ts'o clear_opt(sb, DELALLOC); 342056889787STheodore Ts'o } 342156889787STheodore Ts'o 342256889787STheodore Ts'o blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 342356889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 342456889787STheodore Ts'o if (blocksize < PAGE_SIZE) { 342556889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 342656889787STheodore Ts'o "dioread_nolock if block size != PAGE_SIZE"); 342756889787STheodore Ts'o goto failed_mount; 342856889787STheodore Ts'o } 342956889787STheodore Ts'o } 343056889787STheodore Ts'o 3431ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3432482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3433ac27a0ecSDave Kleikamp 3434617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3435617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3436617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3437617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3438b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3439b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3440b31e1552SEric Sandeen "running e2fsck is recommended"); 3441469108ffSTheodore Tso 34422035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 34432035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 34442035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 34452035e776STheodore Ts'o "using the ext4 subsystem"); 34462035e776STheodore Ts'o else { 34472035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 34482035e776STheodore Ts'o "to feature incompatibilities"); 34492035e776STheodore Ts'o goto failed_mount; 34502035e776STheodore Ts'o } 34512035e776STheodore Ts'o } 34522035e776STheodore Ts'o 34532035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 34542035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 34552035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 34562035e776STheodore Ts'o "using the ext4 subsystem"); 34572035e776STheodore Ts'o else { 34582035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 34592035e776STheodore Ts'o "to feature incompatibilities"); 34602035e776STheodore Ts'o goto failed_mount; 34612035e776STheodore Ts'o } 34622035e776STheodore Ts'o } 34632035e776STheodore Ts'o 3464469108ffSTheodore Tso /* 3465ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3466ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3467ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3468ac27a0ecSDave Kleikamp */ 3469a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3470ac27a0ecSDave Kleikamp goto failed_mount; 3471a13fb1a4SEric Sandeen 3472617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3473617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3474b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3475b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3476ac27a0ecSDave Kleikamp goto failed_mount; 3477ac27a0ecSDave Kleikamp } 3478ac27a0ecSDave Kleikamp 3479ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3480ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3481ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3482b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3483ce40733cSAneesh Kumar K.V blocksize); 3484ac27a0ecSDave Kleikamp goto failed_mount; 3485ac27a0ecSDave Kleikamp } 3486ac27a0ecSDave Kleikamp 3487ac27a0ecSDave Kleikamp brelse(bh); 348870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 348970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 349070bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3491ac27a0ecSDave Kleikamp if (!bh) { 3492b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3493b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3494ac27a0ecSDave Kleikamp goto failed_mount; 3495ac27a0ecSDave Kleikamp } 34962716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3497ac27a0ecSDave Kleikamp sbi->s_es = es; 3498617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3499b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3500b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3501ac27a0ecSDave Kleikamp goto failed_mount; 3502ac27a0ecSDave Kleikamp } 3503ac27a0ecSDave Kleikamp } 3504ac27a0ecSDave Kleikamp 3505a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3506a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3507f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3508f287a1a5STheodore Ts'o has_huge_files); 3509f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3510ac27a0ecSDave Kleikamp 3511617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3512617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3513617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3514ac27a0ecSDave Kleikamp } else { 3515ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3516ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3517617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 35181330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3519ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3520b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3521b31e1552SEric Sandeen "unsupported inode size: %d", 3522ac27a0ecSDave Kleikamp sbi->s_inode_size); 3523ac27a0ecSDave Kleikamp goto failed_mount; 3524ac27a0ecSDave Kleikamp } 3525ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3526ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3527ac27a0ecSDave Kleikamp } 35280b8e58a1SAndreas Dilger 35290d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 35300d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 35318fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 35320d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3533d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3534b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3535b31e1552SEric Sandeen "unsupported descriptor size %lu", 35360d1ee42fSAlexandre Ratchov sbi->s_desc_size); 35370d1ee42fSAlexandre Ratchov goto failed_mount; 35380d1ee42fSAlexandre Ratchov } 35390d1ee42fSAlexandre Ratchov } else 35400d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 35410b8e58a1SAndreas Dilger 3542ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3543ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3544b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3545617ba13bSMingming Cao goto cantfind_ext4; 35460b8e58a1SAndreas Dilger 3547617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3548ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3549617ba13bSMingming Cao goto cantfind_ext4; 3550ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3551ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 35520d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3553ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3554ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3555e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3556e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 35570b8e58a1SAndreas Dilger 3558ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3559ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3560ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3561f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3562f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3563f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3564f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3565f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3566f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3567f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3568f99b2589STheodore Ts'o #else 3569f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3570f99b2589STheodore Ts'o #endif 3571f99b2589STheodore Ts'o } 3572ac27a0ecSDave Kleikamp 3573281b5995STheodore Ts'o /* Handle clustersize */ 3574281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3575281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3576281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3577281b5995STheodore Ts'o if (has_bigalloc) { 3578281b5995STheodore Ts'o if (clustersize < blocksize) { 3579281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3580281b5995STheodore Ts'o "cluster size (%d) smaller than " 3581281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3582281b5995STheodore Ts'o goto failed_mount; 3583281b5995STheodore Ts'o } 3584281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3585281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3586281b5995STheodore Ts'o sbi->s_clusters_per_group = 3587281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3588281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3589281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3590281b5995STheodore Ts'o "#clusters per group too big: %lu", 3591281b5995STheodore Ts'o sbi->s_clusters_per_group); 3592281b5995STheodore Ts'o goto failed_mount; 3593281b5995STheodore Ts'o } 3594281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3595281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3596281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3597281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3598281b5995STheodore Ts'o sbi->s_blocks_per_group, 3599281b5995STheodore Ts'o sbi->s_clusters_per_group); 3600281b5995STheodore Ts'o goto failed_mount; 3601281b5995STheodore Ts'o } 3602281b5995STheodore Ts'o } else { 3603281b5995STheodore Ts'o if (clustersize != blocksize) { 3604281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3605281b5995STheodore Ts'o "block size (%d)", clustersize, 3606281b5995STheodore Ts'o blocksize); 3607281b5995STheodore Ts'o clustersize = blocksize; 3608281b5995STheodore Ts'o } 3609ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3610b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3611b31e1552SEric Sandeen "#blocks per group too big: %lu", 3612ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3613ac27a0ecSDave Kleikamp goto failed_mount; 3614ac27a0ecSDave Kleikamp } 3615281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3616281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3617281b5995STheodore Ts'o } 3618281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3619281b5995STheodore Ts'o 3620ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3621b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3622b31e1552SEric Sandeen "#inodes per group too big: %lu", 3623ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3624ac27a0ecSDave Kleikamp goto failed_mount; 3625ac27a0ecSDave Kleikamp } 3626ac27a0ecSDave Kleikamp 3627bf43d84bSEric Sandeen /* 3628bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3629bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3630bf43d84bSEric Sandeen */ 36315a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 363230ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 36335a9ae68aSDarrick J. Wong if (err) { 3634b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3635bf43d84bSEric Sandeen " too large to mount safely on this system"); 3636ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 363790c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 36385a9ae68aSDarrick J. Wong ret = err; 3639ac27a0ecSDave Kleikamp goto failed_mount; 3640ac27a0ecSDave Kleikamp } 3641ac27a0ecSDave Kleikamp 3642617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3643617ba13bSMingming Cao goto cantfind_ext4; 3644e7c95593SEric Sandeen 36450f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 36460f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 36470f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3648b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3649b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 36500f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 36510f2ddca6SFrom: Thiemo Nagel goto failed_mount; 36520f2ddca6SFrom: Thiemo Nagel } 36530f2ddca6SFrom: Thiemo Nagel 36544ec11028STheodore Ts'o /* 36554ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 36564ec11028STheodore Ts'o * of the filesystem. 36574ec11028STheodore Ts'o */ 36584ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3659b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3660b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3661e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 36624ec11028STheodore Ts'o ext4_blocks_count(es)); 3663e7c95593SEric Sandeen goto failed_mount; 3664e7c95593SEric Sandeen } 3665bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3666bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3667bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3668bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 36694ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3670b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 36714ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3672b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 36734ec11028STheodore Ts'o ext4_blocks_count(es), 36744ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 36754ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 36764ec11028STheodore Ts'o goto failed_mount; 36774ec11028STheodore Ts'o } 3678bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3679fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3680fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3681617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3682617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3683f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3684f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3685ac27a0ecSDave Kleikamp GFP_KERNEL); 3686ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3687b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 36882cde417dSTheodore Ts'o ret = -ENOMEM; 3689ac27a0ecSDave Kleikamp goto failed_mount; 3690ac27a0ecSDave Kleikamp } 3691ac27a0ecSDave Kleikamp 36929f6200bbSTheodore Ts'o if (ext4_proc_root) 36939f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3694240799cdSTheodore Ts'o 369566acdcf4STheodore Ts'o if (sbi->s_proc) 369666acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 369766acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 369866acdcf4STheodore Ts'o 3699705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3700ac27a0ecSDave Kleikamp 3701ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 370270bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3703ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3704ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3705b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3706b31e1552SEric Sandeen "can't read group descriptor %d", i); 3707ac27a0ecSDave Kleikamp db_count = i; 3708ac27a0ecSDave Kleikamp goto failed_mount2; 3709ac27a0ecSDave Kleikamp } 3710ac27a0ecSDave Kleikamp } 3711bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3712b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3713ac27a0ecSDave Kleikamp goto failed_mount2; 3714ac27a0ecSDave Kleikamp } 3715772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3716772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3717b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3718b31e1552SEric Sandeen "unable to initialize " 3719b31e1552SEric Sandeen "flex_bg meta info!"); 3720772cb7c8SJose R. Santos goto failed_mount2; 3721772cb7c8SJose R. Santos } 3722772cb7c8SJose R. Santos 3723ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3724ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3725ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3726ac27a0ecSDave Kleikamp 372704496411STao Ma init_timer(&sbi->s_err_report); 372804496411STao Ma sbi->s_err_report.function = print_daily_error_info; 372904496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 373004496411STao Ma 373157042651STheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, 37325dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3733ce7e010aSTheodore Ts'o if (!err) { 3734ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3735ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3736ce7e010aSTheodore Ts'o } 3737ce7e010aSTheodore Ts'o if (!err) { 3738ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3739ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3740ce7e010aSTheodore Ts'o } 3741ce7e010aSTheodore Ts'o if (!err) { 374257042651STheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 3743ce7e010aSTheodore Ts'o } 3744ce7e010aSTheodore Ts'o if (err) { 3745ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 37462cde417dSTheodore Ts'o ret = err; 3747ce7e010aSTheodore Ts'o goto failed_mount3; 3748ce7e010aSTheodore Ts'o } 3749ce7e010aSTheodore Ts'o 3750c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 375155138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3752c9de560dSAlex Tomas 3753ac27a0ecSDave Kleikamp /* 3754ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3755ac27a0ecSDave Kleikamp */ 37569ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 37579ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3758617ba13bSMingming Cao sb->s_op = &ext4_sops; 37599ca92389STheodore Ts'o else 37609ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3761617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3762617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3763ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3764617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3765617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 37667c319d32SAditya Kali 37677c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 37687c319d32SAditya Kali /* Use qctl operations for hidden quota files. */ 37697c319d32SAditya Kali sb->s_qcop = &ext4_qctl_sysfile_operations; 37707c319d32SAditya Kali } 3771ac27a0ecSDave Kleikamp #endif 3772f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3773f2fa2ffcSAneesh Kumar K.V 3774ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 37753b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 37768f82f840SYongqiang Yang sbi->s_resize_flags = 0; 3777ac27a0ecSDave Kleikamp 3778ac27a0ecSDave Kleikamp sb->s_root = NULL; 3779ac27a0ecSDave Kleikamp 3780ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3781617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3782617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3783ac27a0ecSDave Kleikamp 3784c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3785c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3786c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3787c5e06d10SJohann Lombardi goto failed_mount3; 3788c5e06d10SJohann Lombardi 3789ac27a0ecSDave Kleikamp /* 3790ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3791ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3792ac27a0ecSDave Kleikamp */ 3793ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3794617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3795617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3796ac27a0ecSDave Kleikamp goto failed_mount3; 37970390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 37980390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3799b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3800b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3801744692dcSJiaying Zhang goto failed_mount_wq; 3802ac27a0ecSDave Kleikamp } else { 3803fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 38040390131bSFrank Mayhar sbi->s_journal = NULL; 38050390131bSFrank Mayhar needs_recovery = 0; 38060390131bSFrank Mayhar goto no_journal; 3807ac27a0ecSDave Kleikamp } 3808ac27a0ecSDave Kleikamp 3809f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3810eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3811eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3812b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3813744692dcSJiaying Zhang goto failed_mount_wq; 3814eb40a09cSJose R. Santos } 3815eb40a09cSJose R. Santos 381625ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 381725ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 381825ed6e8aSDarrick J. Wong "feature set"); 381925ed6e8aSDarrick J. Wong goto failed_mount_wq; 3820d4da6c9cSLinus Torvalds } 3821818d276cSGirish Shilamkar 3822ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3823ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3824ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3825ac27a0ecSDave Kleikamp case 0: 3826ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 382763f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 382863f57933SAndrew Morton * cope, else JOURNAL_DATA 382963f57933SAndrew Morton */ 3830dab291afSMingming Cao if (jbd2_journal_check_available_features 3831dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3832fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3833ac27a0ecSDave Kleikamp else 3834fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3835ac27a0ecSDave Kleikamp break; 3836ac27a0ecSDave Kleikamp 3837617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3838617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3839dab291afSMingming Cao if (!jbd2_journal_check_available_features 3840dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3841b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3842b31e1552SEric Sandeen "requested data journaling mode"); 3843744692dcSJiaying Zhang goto failed_mount_wq; 3844ac27a0ecSDave Kleikamp } 3845ac27a0ecSDave Kleikamp default: 3846ac27a0ecSDave Kleikamp break; 3847ac27a0ecSDave Kleikamp } 3848b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3849ac27a0ecSDave Kleikamp 385018aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 385118aadd47SBobi Jam 3852ce7e010aSTheodore Ts'o /* 3853ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3854ce7e010aSTheodore Ts'o * need to update the global counters. 3855ce7e010aSTheodore Ts'o */ 385657042651STheodore Ts'o percpu_counter_set(&sbi->s_freeclusters_counter, 38575dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3858ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 385984061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3860ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 386184061e07SDmitry Monakhov ext4_count_dirs(sb)); 386257042651STheodore Ts'o percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); 3863206f7ab4SChristoph Hellwig 3864ce7e010aSTheodore Ts'o no_journal: 3865fd89d5f2STejun Heo /* 3866952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 3867952fc18eSTheodore Ts'o * superblock if present. 3868952fc18eSTheodore Ts'o */ 3869952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 3870952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 3871952fc18eSTheodore Ts'o else { 3872952fc18eSTheodore Ts'o ret = ext4_calculate_overhead(sb); 3873952fc18eSTheodore Ts'o if (ret) 3874952fc18eSTheodore Ts'o goto failed_mount_wq; 3875952fc18eSTheodore Ts'o } 3876952fc18eSTheodore Ts'o 3877952fc18eSTheodore Ts'o /* 3878fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3879fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3880fd89d5f2STejun Heo */ 3881fd89d5f2STejun Heo EXT4_SB(sb)->dio_unwritten_wq = 3882ae005cbeSLinus Torvalds alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 38834c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 38844c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 38854c0425ffSMingming Cao goto failed_mount_wq; 38864c0425ffSMingming Cao } 38874c0425ffSMingming Cao 3888ac27a0ecSDave Kleikamp /* 3889dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3890ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3891ac27a0ecSDave Kleikamp */ 3892ac27a0ecSDave Kleikamp 38931d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 38941d1fe1eeSDavid Howells if (IS_ERR(root)) { 3895b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 38961d1fe1eeSDavid Howells ret = PTR_ERR(root); 389732a9bb57SManish Katiyar root = NULL; 3898ac27a0ecSDave Kleikamp goto failed_mount4; 3899ac27a0ecSDave Kleikamp } 3900ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3901b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 390294bf608aSAl Viro iput(root); 3903ac27a0ecSDave Kleikamp goto failed_mount4; 3904ac27a0ecSDave Kleikamp } 390548fde701SAl Viro sb->s_root = d_make_root(root); 39061d1fe1eeSDavid Howells if (!sb->s_root) { 3907b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 39081d1fe1eeSDavid Howells ret = -ENOMEM; 39091d1fe1eeSDavid Howells goto failed_mount4; 39101d1fe1eeSDavid Howells } 3911ac27a0ecSDave Kleikamp 39127e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 39137e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 3914ef7f3835SKalpak Shah 3915ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3916ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3917ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3918ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3919ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3920ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3921ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3922ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3923ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3924ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3925ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3926ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3927ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3928ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3929ef7f3835SKalpak Shah } 3930ef7f3835SKalpak Shah } 3931ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3932ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3933ef7f3835SKalpak Shah sbi->s_inode_size) { 3934ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3935ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3936b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3937b31e1552SEric Sandeen "available"); 3938ef7f3835SKalpak Shah } 3939ef7f3835SKalpak Shah 39406fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 39416fd058f7STheodore Ts'o if (err) { 3942b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3943fbe845ddSCurt Wohlgemuth "zone (%d)", err); 394494bf608aSAl Viro goto failed_mount4a; 39456fd058f7STheodore Ts'o } 39466fd058f7STheodore Ts'o 3947c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 39489d99012fSAkira Fujita err = ext4_mb_init(sb); 3949c2774d84SAneesh Kumar K.V if (err) { 3950421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3951c2774d84SAneesh Kumar K.V err); 3952dcf2d804STao Ma goto failed_mount5; 3953c2774d84SAneesh Kumar K.V } 3954c2774d84SAneesh Kumar K.V 3955bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3956bfff6873SLukas Czerner if (err) 3957dcf2d804STao Ma goto failed_mount6; 3958bfff6873SLukas Czerner 39593197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 39603197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 39613197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 39623197ebdbSTheodore Ts'o "%s", sb->s_id); 3963dcf2d804STao Ma if (err) 3964dcf2d804STao Ma goto failed_mount7; 39653197ebdbSTheodore Ts'o 3966617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3967617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3968617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 39690390131bSFrank Mayhar if (needs_recovery) { 3970b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3971617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 39720390131bSFrank Mayhar } 39730390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 39740390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 39750390131bSFrank Mayhar descr = " journalled data mode"; 39760390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 39770390131bSFrank Mayhar descr = " ordered data mode"; 39780390131bSFrank Mayhar else 39790390131bSFrank Mayhar descr = " writeback data mode"; 39800390131bSFrank Mayhar } else 39810390131bSFrank Mayhar descr = "out journal"; 39820390131bSFrank Mayhar 39837c319d32SAditya Kali #ifdef CONFIG_QUOTA 39847c319d32SAditya Kali /* Enable quota usage during mount. */ 39857c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 39867c319d32SAditya Kali !(sb->s_flags & MS_RDONLY)) { 39877c319d32SAditya Kali ret = ext4_enable_quotas(sb); 39887c319d32SAditya Kali if (ret) 39897c319d32SAditya Kali goto failed_mount7; 39907c319d32SAditya Kali } 39917c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 39927c319d32SAditya Kali 3993d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 39948b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 39958b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3996ac27a0ecSDave Kleikamp 399766e61a9eSTheodore Ts'o if (es->s_error_count) 399866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3999ac27a0ecSDave Kleikamp 4000d4c402d9SCurt Wohlgemuth kfree(orig_data); 4001ac27a0ecSDave Kleikamp return 0; 4002ac27a0ecSDave Kleikamp 4003617ba13bSMingming Cao cantfind_ext4: 4004ac27a0ecSDave Kleikamp if (!silent) 4005b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4006ac27a0ecSDave Kleikamp goto failed_mount; 4007ac27a0ecSDave Kleikamp 4008dcf2d804STao Ma failed_mount7: 4009dcf2d804STao Ma ext4_unregister_li_request(sb); 4010dcf2d804STao Ma failed_mount6: 4011dcf2d804STao Ma ext4_mb_release(sb); 401294bf608aSAl Viro failed_mount5: 401394bf608aSAl Viro ext4_ext_release(sb); 4014dcf2d804STao Ma ext4_release_system_zone(sb); 401594bf608aSAl Viro failed_mount4a: 401694bf608aSAl Viro dput(sb->s_root); 401732a9bb57SManish Katiyar sb->s_root = NULL; 401894bf608aSAl Viro failed_mount4: 4019b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 40204c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 40214c0425ffSMingming Cao failed_mount_wq: 40220390131bSFrank Mayhar if (sbi->s_journal) { 4023dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 402447b4a50bSJan Kara sbi->s_journal = NULL; 40250390131bSFrank Mayhar } 4026ac27a0ecSDave Kleikamp failed_mount3: 402704496411STao Ma del_timer(&sbi->s_err_report); 40289933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 40299933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 403057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4031ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4032ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 403357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 4034c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4035c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4036ac27a0ecSDave Kleikamp failed_mount2: 4037ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4038ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4039f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4040ac27a0ecSDave Kleikamp failed_mount: 40410441984aSDarrick J. Wong if (sbi->s_chksum_driver) 40420441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4043240799cdSTheodore Ts'o if (sbi->s_proc) { 404466acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 40459f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4046240799cdSTheodore Ts'o } 4047ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4048ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4049ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4050ac27a0ecSDave Kleikamp #endif 4051617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4052ac27a0ecSDave Kleikamp brelse(bh); 4053ac27a0ecSDave Kleikamp out_fail: 4054ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4055f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4056ac27a0ecSDave Kleikamp kfree(sbi); 4057dcc7dae3SCyrill Gorcunov out_free_orig: 4058d4c402d9SCurt Wohlgemuth kfree(orig_data); 40591d1fe1eeSDavid Howells return ret; 4060ac27a0ecSDave Kleikamp } 4061ac27a0ecSDave Kleikamp 4062ac27a0ecSDave Kleikamp /* 4063ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4064ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4065ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4066ac27a0ecSDave Kleikamp */ 4067617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4068ac27a0ecSDave Kleikamp { 4069617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4070ac27a0ecSDave Kleikamp 4071ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 407230773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 407330773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4074ac27a0ecSDave Kleikamp 4075a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4076ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4077dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4078ac27a0ecSDave Kleikamp else 4079dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 40805bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 40815bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 40825bf5683aSHidehiro Kawai else 40835bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4084a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4085ac27a0ecSDave Kleikamp } 4086ac27a0ecSDave Kleikamp 4087617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4088ac27a0ecSDave Kleikamp unsigned int journal_inum) 4089ac27a0ecSDave Kleikamp { 4090ac27a0ecSDave Kleikamp struct inode *journal_inode; 4091ac27a0ecSDave Kleikamp journal_t *journal; 4092ac27a0ecSDave Kleikamp 40930390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 40940390131bSFrank Mayhar 4095ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4096ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4097ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4098ac27a0ecSDave Kleikamp 40991d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 41001d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4101b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4102ac27a0ecSDave Kleikamp return NULL; 4103ac27a0ecSDave Kleikamp } 4104ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4105ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4106ac27a0ecSDave Kleikamp iput(journal_inode); 4107b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4108ac27a0ecSDave Kleikamp return NULL; 4109ac27a0ecSDave Kleikamp } 4110ac27a0ecSDave Kleikamp 4111e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4112ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 41131d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4114b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4115ac27a0ecSDave Kleikamp iput(journal_inode); 4116ac27a0ecSDave Kleikamp return NULL; 4117ac27a0ecSDave Kleikamp } 4118ac27a0ecSDave Kleikamp 4119dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4120ac27a0ecSDave Kleikamp if (!journal) { 4121b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4122ac27a0ecSDave Kleikamp iput(journal_inode); 4123ac27a0ecSDave Kleikamp return NULL; 4124ac27a0ecSDave Kleikamp } 4125ac27a0ecSDave Kleikamp journal->j_private = sb; 4126617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4127ac27a0ecSDave Kleikamp return journal; 4128ac27a0ecSDave Kleikamp } 4129ac27a0ecSDave Kleikamp 4130617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4131ac27a0ecSDave Kleikamp dev_t j_dev) 4132ac27a0ecSDave Kleikamp { 4133ac27a0ecSDave Kleikamp struct buffer_head *bh; 4134ac27a0ecSDave Kleikamp journal_t *journal; 4135617ba13bSMingming Cao ext4_fsblk_t start; 4136617ba13bSMingming Cao ext4_fsblk_t len; 4137ac27a0ecSDave Kleikamp int hblock, blocksize; 4138617ba13bSMingming Cao ext4_fsblk_t sb_block; 4139ac27a0ecSDave Kleikamp unsigned long offset; 4140617ba13bSMingming Cao struct ext4_super_block *es; 4141ac27a0ecSDave Kleikamp struct block_device *bdev; 4142ac27a0ecSDave Kleikamp 41430390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41440390131bSFrank Mayhar 4145b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4146ac27a0ecSDave Kleikamp if (bdev == NULL) 4147ac27a0ecSDave Kleikamp return NULL; 4148ac27a0ecSDave Kleikamp 4149ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4150e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4151ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4152b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4153b31e1552SEric Sandeen "blocksize too small for journal device"); 4154ac27a0ecSDave Kleikamp goto out_bdev; 4155ac27a0ecSDave Kleikamp } 4156ac27a0ecSDave Kleikamp 4157617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4158617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4159ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4160ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4161b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4162b31e1552SEric Sandeen "external journal"); 4163ac27a0ecSDave Kleikamp goto out_bdev; 4164ac27a0ecSDave Kleikamp } 4165ac27a0ecSDave Kleikamp 41662716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4167617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4168ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4169617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4170b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4171b31e1552SEric Sandeen "bad superblock"); 4172ac27a0ecSDave Kleikamp brelse(bh); 4173ac27a0ecSDave Kleikamp goto out_bdev; 4174ac27a0ecSDave Kleikamp } 4175ac27a0ecSDave Kleikamp 4176617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4177b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4178ac27a0ecSDave Kleikamp brelse(bh); 4179ac27a0ecSDave Kleikamp goto out_bdev; 4180ac27a0ecSDave Kleikamp } 4181ac27a0ecSDave Kleikamp 4182bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4183ac27a0ecSDave Kleikamp start = sb_block + 1; 4184ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4185ac27a0ecSDave Kleikamp 4186dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4187ac27a0ecSDave Kleikamp start, len, blocksize); 4188ac27a0ecSDave Kleikamp if (!journal) { 4189b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4190ac27a0ecSDave Kleikamp goto out_bdev; 4191ac27a0ecSDave Kleikamp } 4192ac27a0ecSDave Kleikamp journal->j_private = sb; 4193ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 4194ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4195ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4196b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4197ac27a0ecSDave Kleikamp goto out_journal; 4198ac27a0ecSDave Kleikamp } 4199ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4200b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4201b31e1552SEric Sandeen "user (unsupported) - %d", 4202ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4203ac27a0ecSDave Kleikamp goto out_journal; 4204ac27a0ecSDave Kleikamp } 4205617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4206617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4207ac27a0ecSDave Kleikamp return journal; 42080b8e58a1SAndreas Dilger 4209ac27a0ecSDave Kleikamp out_journal: 4210dab291afSMingming Cao jbd2_journal_destroy(journal); 4211ac27a0ecSDave Kleikamp out_bdev: 4212617ba13bSMingming Cao ext4_blkdev_put(bdev); 4213ac27a0ecSDave Kleikamp return NULL; 4214ac27a0ecSDave Kleikamp } 4215ac27a0ecSDave Kleikamp 4216617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4217617ba13bSMingming Cao struct ext4_super_block *es, 4218ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4219ac27a0ecSDave Kleikamp { 4220ac27a0ecSDave Kleikamp journal_t *journal; 4221ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4222ac27a0ecSDave Kleikamp dev_t journal_dev; 4223ac27a0ecSDave Kleikamp int err = 0; 4224ac27a0ecSDave Kleikamp int really_read_only; 4225ac27a0ecSDave Kleikamp 42260390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 42270390131bSFrank Mayhar 4228ac27a0ecSDave Kleikamp if (journal_devnum && 4229ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4230b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4231b31e1552SEric Sandeen "numbers have changed"); 4232ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4233ac27a0ecSDave Kleikamp } else 4234ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4235ac27a0ecSDave Kleikamp 4236ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4237ac27a0ecSDave Kleikamp 4238ac27a0ecSDave Kleikamp /* 4239ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4240ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4241ac27a0ecSDave Kleikamp * can get read-write access to the device. 4242ac27a0ecSDave Kleikamp */ 4243617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4244ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4245b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4246b31e1552SEric Sandeen "required on readonly filesystem"); 4247ac27a0ecSDave Kleikamp if (really_read_only) { 4248b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4249b31e1552SEric Sandeen "unavailable, cannot proceed"); 4250ac27a0ecSDave Kleikamp return -EROFS; 4251ac27a0ecSDave Kleikamp } 4252b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4253b31e1552SEric Sandeen "be enabled during recovery"); 4254ac27a0ecSDave Kleikamp } 4255ac27a0ecSDave Kleikamp } 4256ac27a0ecSDave Kleikamp 4257ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4258b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4259b31e1552SEric Sandeen "and inode journals!"); 4260ac27a0ecSDave Kleikamp return -EINVAL; 4261ac27a0ecSDave Kleikamp } 4262ac27a0ecSDave Kleikamp 4263ac27a0ecSDave Kleikamp if (journal_inum) { 4264617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4265ac27a0ecSDave Kleikamp return -EINVAL; 4266ac27a0ecSDave Kleikamp } else { 4267617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4268ac27a0ecSDave Kleikamp return -EINVAL; 4269ac27a0ecSDave Kleikamp } 4270ac27a0ecSDave Kleikamp 427190576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4272b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 42734776004fSTheodore Ts'o 4274617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4275dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 42761c13d5c0STheodore Ts'o if (!err) { 42771c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 42781c13d5c0STheodore Ts'o if (save) 42791c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 42801c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4281dab291afSMingming Cao err = jbd2_journal_load(journal); 42821c13d5c0STheodore Ts'o if (save) 42831c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 42841c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 42851c13d5c0STheodore Ts'o kfree(save); 42861c13d5c0STheodore Ts'o } 4287ac27a0ecSDave Kleikamp 4288ac27a0ecSDave Kleikamp if (err) { 4289b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4290dab291afSMingming Cao jbd2_journal_destroy(journal); 4291ac27a0ecSDave Kleikamp return err; 4292ac27a0ecSDave Kleikamp } 4293ac27a0ecSDave Kleikamp 4294617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4295617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4296ac27a0ecSDave Kleikamp 4297c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4298ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4299ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4300ac27a0ecSDave Kleikamp 4301ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4302e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4303ac27a0ecSDave Kleikamp } 4304ac27a0ecSDave Kleikamp 4305ac27a0ecSDave Kleikamp return 0; 4306ac27a0ecSDave Kleikamp } 4307ac27a0ecSDave Kleikamp 4308e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4309ac27a0ecSDave Kleikamp { 4310e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4311617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4312c4be0c1dSTakashi Sato int error = 0; 4313ac27a0ecSDave Kleikamp 43147c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4315c4be0c1dSTakashi Sato return error; 4316914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4317914258bfSTheodore Ts'o /* 4318914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4319914258bfSTheodore Ts'o * superblock failed. This could happen because the 4320914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4321914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4322914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4323914258bfSTheodore Ts'o * write and hope for the best. 4324914258bfSTheodore Ts'o */ 4325b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4326b31e1552SEric Sandeen "superblock detected"); 4327914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4328914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4329914258bfSTheodore Ts'o } 433071290b36STheodore Ts'o /* 433171290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 433271290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 433371290b36STheodore Ts'o * write time when we are mounting the root file system 433471290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 433571290b36STheodore Ts'o * for people who are east of GMT and who make their clock 433671290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 433771290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 433871290b36STheodore Ts'o * to complain and force a full file system check. 433971290b36STheodore Ts'o */ 434071290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4341ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4342f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4343afc32f7eSTheodore Ts'o es->s_kbytes_written = 4344afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4345afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4346afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4347f613dfcbSTheodore Ts'o else 4348f613dfcbSTheodore Ts'o es->s_kbytes_written = 4349f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 435057042651STheodore Ts'o ext4_free_blocks_count_set(es, 435157042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 435257042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 43537f93cff9STheodore Ts'o es->s_free_inodes_count = 43547f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 43555d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4356ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 4357a9c47317SDarrick J. Wong ext4_superblock_csum_set(sb, es); 4358ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4359914258bfSTheodore Ts'o if (sync) { 4360c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4361c4be0c1dSTakashi Sato if (error) 4362c4be0c1dSTakashi Sato return error; 4363c4be0c1dSTakashi Sato 4364c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4365c4be0c1dSTakashi Sato if (error) { 4366b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4367b31e1552SEric Sandeen "superblock"); 4368914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4369914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4370914258bfSTheodore Ts'o } 4371914258bfSTheodore Ts'o } 4372c4be0c1dSTakashi Sato return error; 4373ac27a0ecSDave Kleikamp } 4374ac27a0ecSDave Kleikamp 4375ac27a0ecSDave Kleikamp /* 4376ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4377ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4378ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4379ac27a0ecSDave Kleikamp */ 4380617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4381617ba13bSMingming Cao struct ext4_super_block *es) 4382ac27a0ecSDave Kleikamp { 4383617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4384ac27a0ecSDave Kleikamp 43850390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 43860390131bSFrank Mayhar BUG_ON(journal != NULL); 43870390131bSFrank Mayhar return; 43880390131bSFrank Mayhar } 4389dab291afSMingming Cao jbd2_journal_lock_updates(journal); 43907ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 43917ffe1ea8SHidehiro Kawai goto out; 43927ffe1ea8SHidehiro Kawai 4393617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4394ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4395617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4396e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4397ac27a0ecSDave Kleikamp } 43987ffe1ea8SHidehiro Kawai 43997ffe1ea8SHidehiro Kawai out: 4400dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4401ac27a0ecSDave Kleikamp } 4402ac27a0ecSDave Kleikamp 4403ac27a0ecSDave Kleikamp /* 4404ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4405ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4406ac27a0ecSDave Kleikamp * main filesystem now. 4407ac27a0ecSDave Kleikamp */ 4408617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4409617ba13bSMingming Cao struct ext4_super_block *es) 4410ac27a0ecSDave Kleikamp { 4411ac27a0ecSDave Kleikamp journal_t *journal; 4412ac27a0ecSDave Kleikamp int j_errno; 4413ac27a0ecSDave Kleikamp const char *errstr; 4414ac27a0ecSDave Kleikamp 44150390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44160390131bSFrank Mayhar 4417617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4418ac27a0ecSDave Kleikamp 4419ac27a0ecSDave Kleikamp /* 4420ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4421617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4422ac27a0ecSDave Kleikamp */ 4423ac27a0ecSDave Kleikamp 4424dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4425ac27a0ecSDave Kleikamp if (j_errno) { 4426ac27a0ecSDave Kleikamp char nbuf[16]; 4427ac27a0ecSDave Kleikamp 4428617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 442912062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4430ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 443112062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4432ac27a0ecSDave Kleikamp 4433617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4434617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4435e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4436ac27a0ecSDave Kleikamp 4437dab291afSMingming Cao jbd2_journal_clear_err(journal); 4438d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4439ac27a0ecSDave Kleikamp } 4440ac27a0ecSDave Kleikamp } 4441ac27a0ecSDave Kleikamp 4442ac27a0ecSDave Kleikamp /* 4443ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4444ac27a0ecSDave Kleikamp * and wait on the commit. 4445ac27a0ecSDave Kleikamp */ 4446617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4447ac27a0ecSDave Kleikamp { 4448ac27a0ecSDave Kleikamp journal_t *journal; 44490390131bSFrank Mayhar int ret = 0; 4450ac27a0ecSDave Kleikamp 4451ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4452ac27a0ecSDave Kleikamp return 0; 4453ac27a0ecSDave Kleikamp 4454617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 44558e8ad8a5SJan Kara if (journal) 4456617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 44570390131bSFrank Mayhar 4458ac27a0ecSDave Kleikamp return ret; 4459ac27a0ecSDave Kleikamp } 4460ac27a0ecSDave Kleikamp 4461617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4462ac27a0ecSDave Kleikamp { 446314ce0cb4STheodore Ts'o int ret = 0; 44649eddacf9SJan Kara tid_t target; 44658d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4466ac27a0ecSDave Kleikamp 44679bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 44688d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 4469a1177825SJan Kara /* 4470a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4471a1177825SJan Kara * no dirty dquots 4472a1177825SJan Kara */ 4473a1177825SJan Kara dquot_writeback_dquots(sb, -1); 44748d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4475ac27a0ecSDave Kleikamp if (wait) 44768d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 44770390131bSFrank Mayhar } 447814ce0cb4STheodore Ts'o return ret; 4479ac27a0ecSDave Kleikamp } 4480ac27a0ecSDave Kleikamp 4481ac27a0ecSDave Kleikamp /* 4482ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4483ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4484be4f27d3SYongqiang Yang * 4485be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 44868e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 44878e8ad8a5SJan Kara * modifications. 4488ac27a0ecSDave Kleikamp */ 4489c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4490ac27a0ecSDave Kleikamp { 4491c4be0c1dSTakashi Sato int error = 0; 4492c4be0c1dSTakashi Sato journal_t *journal; 4493ac27a0ecSDave Kleikamp 44949ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 44959ca92389STheodore Ts'o return 0; 44969ca92389STheodore Ts'o 4497c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4498ac27a0ecSDave Kleikamp 4499ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4500dab291afSMingming Cao jbd2_journal_lock_updates(journal); 45017ffe1ea8SHidehiro Kawai 45027ffe1ea8SHidehiro Kawai /* 45039ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 45049ca92389STheodore Ts'o * the journal. 45057ffe1ea8SHidehiro Kawai */ 4506c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 45076b0310fbSEric Sandeen if (error < 0) 45086b0310fbSEric Sandeen goto out; 4509ac27a0ecSDave Kleikamp 4510ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4511617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4512e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 45136b0310fbSEric Sandeen out: 45148e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 45156b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 45166b0310fbSEric Sandeen return error; 4517ac27a0ecSDave Kleikamp } 4518ac27a0ecSDave Kleikamp 4519ac27a0ecSDave Kleikamp /* 4520ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4521ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4522ac27a0ecSDave Kleikamp */ 4523c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4524ac27a0ecSDave Kleikamp { 45259ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 45269ca92389STheodore Ts'o return 0; 45279ca92389STheodore Ts'o 4528ac27a0ecSDave Kleikamp lock_super(sb); 45299ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4530617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4531e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4532ac27a0ecSDave Kleikamp unlock_super(sb); 4533c4be0c1dSTakashi Sato return 0; 4534ac27a0ecSDave Kleikamp } 4535ac27a0ecSDave Kleikamp 4536673c6100STheodore Ts'o /* 4537673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4538673c6100STheodore Ts'o */ 4539673c6100STheodore Ts'o struct ext4_mount_options { 4540673c6100STheodore Ts'o unsigned long s_mount_opt; 4541a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 454208cefc7aSEric W. Biederman kuid_t s_resuid; 454308cefc7aSEric W. Biederman kgid_t s_resgid; 4544673c6100STheodore Ts'o unsigned long s_commit_interval; 4545673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4546673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4547673c6100STheodore Ts'o int s_jquota_fmt; 4548673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4549673c6100STheodore Ts'o #endif 4550673c6100STheodore Ts'o }; 4551673c6100STheodore Ts'o 4552617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4553ac27a0ecSDave Kleikamp { 4554617ba13bSMingming Cao struct ext4_super_block *es; 4555617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4556ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4557617ba13bSMingming Cao struct ext4_mount_options old_opts; 4558c79d967dSChristoph Hellwig int enable_quota = 0; 45598a266467STheodore Ts'o ext4_group_t g; 4560b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4561c5e06d10SJohann Lombardi int err = 0; 4562ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4563ac27a0ecSDave Kleikamp int i; 4564ac27a0ecSDave Kleikamp #endif 4565d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4566ac27a0ecSDave Kleikamp 4567ac27a0ecSDave Kleikamp /* Store the original options */ 4568bbd6851aSAl Viro lock_super(sb); 4569ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4570ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4571a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4572ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4573ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4574ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 457530773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 457630773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4577ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4578ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4579ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4580ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4581ac27a0ecSDave Kleikamp #endif 4582b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4583b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4584ac27a0ecSDave Kleikamp 4585ac27a0ecSDave Kleikamp /* 4586ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4587ac27a0ecSDave Kleikamp */ 4588661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4589ac27a0ecSDave Kleikamp err = -EINVAL; 4590ac27a0ecSDave Kleikamp goto restore_opts; 4591ac27a0ecSDave Kleikamp } 4592ac27a0ecSDave Kleikamp 45934ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4594c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4595ac27a0ecSDave Kleikamp 4596ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4597482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4598ac27a0ecSDave Kleikamp 4599ac27a0ecSDave Kleikamp es = sbi->s_es; 4600ac27a0ecSDave Kleikamp 4601b3881f74STheodore Ts'o if (sbi->s_journal) { 4602617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4603b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4604b3881f74STheodore Ts'o } 4605ac27a0ecSDave Kleikamp 4606661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 46074ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4608ac27a0ecSDave Kleikamp err = -EROFS; 4609ac27a0ecSDave Kleikamp goto restore_opts; 4610ac27a0ecSDave Kleikamp } 4611ac27a0ecSDave Kleikamp 4612ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 46130f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 46140f0dd62fSChristoph Hellwig if (err < 0) 4615c79d967dSChristoph Hellwig goto restore_opts; 4616c79d967dSChristoph Hellwig 4617ac27a0ecSDave Kleikamp /* 4618ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4619ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4620ac27a0ecSDave Kleikamp */ 4621ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4622ac27a0ecSDave Kleikamp 4623ac27a0ecSDave Kleikamp /* 4624ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4625ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4626ac27a0ecSDave Kleikamp * mark the partition as valid again. 4627ac27a0ecSDave Kleikamp */ 4628617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4629617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4630ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4631ac27a0ecSDave Kleikamp 4632a63c9eb2STheodore Ts'o if (sbi->s_journal) 4633617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4634ac27a0ecSDave Kleikamp } else { 4635a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4636a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4637ac27a0ecSDave Kleikamp err = -EROFS; 4638ac27a0ecSDave Kleikamp goto restore_opts; 4639ac27a0ecSDave Kleikamp } 4640ead6596bSEric Sandeen /* 46418a266467STheodore Ts'o * Make sure the group descriptor checksums 46420b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 46438a266467STheodore Ts'o */ 46448a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 46458a266467STheodore Ts'o struct ext4_group_desc *gdp = 46468a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 46478a266467STheodore Ts'o 4648feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4649b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4650b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 46518a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 46528a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 46538a266467STheodore Ts'o err = -EINVAL; 46548a266467STheodore Ts'o goto restore_opts; 46558a266467STheodore Ts'o } 46568a266467STheodore Ts'o } 46578a266467STheodore Ts'o 46588a266467STheodore Ts'o /* 4659ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4660ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4661ead6596bSEric Sandeen * require a full umount/remount for now. 4662ead6596bSEric Sandeen */ 4663ead6596bSEric Sandeen if (es->s_last_orphan) { 4664b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4665ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4666ead6596bSEric Sandeen "orphan inode list. Please " 4667b31e1552SEric Sandeen "umount/remount instead"); 4668ead6596bSEric Sandeen err = -EINVAL; 4669ead6596bSEric Sandeen goto restore_opts; 4670ead6596bSEric Sandeen } 4671ead6596bSEric Sandeen 4672ac27a0ecSDave Kleikamp /* 4673ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4674ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4675ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4676ac27a0ecSDave Kleikamp * the partition.) 4677ac27a0ecSDave Kleikamp */ 46780390131bSFrank Mayhar if (sbi->s_journal) 4679617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4680ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4681617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4682ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4683c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4684c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4685c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4686c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4687c5e06d10SJohann Lombardi err = -EROFS; 4688c5e06d10SJohann Lombardi goto restore_opts; 4689c5e06d10SJohann Lombardi } 4690c79d967dSChristoph Hellwig enable_quota = 1; 4691ac27a0ecSDave Kleikamp } 4692ac27a0ecSDave Kleikamp } 4693bfff6873SLukas Czerner 4694bfff6873SLukas Czerner /* 4695bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4696bfff6873SLukas Czerner * current settings 4697bfff6873SLukas Czerner */ 4698bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4699bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4700bfff6873SLukas Czerner else { 4701bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4702bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4703bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4704bfff6873SLukas Czerner } 4705bfff6873SLukas Czerner 47066fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 47070390131bSFrank Mayhar if (sbi->s_journal == NULL) 4708e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 47090390131bSFrank Mayhar 47107c319d32SAditya Kali unlock_super(sb); 4711ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4712ac27a0ecSDave Kleikamp /* Release old quota file names */ 4713ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4714ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4715ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4716ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 47177c319d32SAditya Kali if (enable_quota) { 47187c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 47190f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 47207c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 47217c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 47227c319d32SAditya Kali err = ext4_enable_quotas(sb); 47237c319d32SAditya Kali if (err) { 47247c319d32SAditya Kali lock_super(sb); 47257c319d32SAditya Kali goto restore_opts; 47267c319d32SAditya Kali } 47277c319d32SAditya Kali } 47287c319d32SAditya Kali } 47297c319d32SAditya Kali #endif 4730d4c402d9SCurt Wohlgemuth 4731d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4732d4c402d9SCurt Wohlgemuth kfree(orig_data); 4733ac27a0ecSDave Kleikamp return 0; 47340b8e58a1SAndreas Dilger 4735ac27a0ecSDave Kleikamp restore_opts: 4736ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4737ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4738a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4739ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4740ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4741ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 474230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 474330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4744ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4745ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4746ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4747ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4748ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4749ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4750ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4751ac27a0ecSDave Kleikamp } 4752ac27a0ecSDave Kleikamp #endif 4753bbd6851aSAl Viro unlock_super(sb); 4754d4c402d9SCurt Wohlgemuth kfree(orig_data); 4755ac27a0ecSDave Kleikamp return err; 4756ac27a0ecSDave Kleikamp } 4757ac27a0ecSDave Kleikamp 4758617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4759ac27a0ecSDave Kleikamp { 4760ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4761617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4762617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4763952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 4764960cc398SPekka Enberg u64 fsid; 4765d02a9391SKazuya Mio s64 bfree; 4766ac27a0ecSDave Kleikamp 4767952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 4768952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 4769ac27a0ecSDave Kleikamp 4770617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4771ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4772952fc18eSTheodore Ts'o buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, sbi->s_overhead); 477357042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 477457042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4775d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 477657042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 4777bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4778bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4779ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4780ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 478152d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4782617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4783960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4784960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4785960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4786960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 47870b8e58a1SAndreas Dilger 4788ac27a0ecSDave Kleikamp return 0; 4789ac27a0ecSDave Kleikamp } 4790ac27a0ecSDave Kleikamp 47910b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 47920b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4793ac27a0ecSDave Kleikamp * Process 1 Process 2 4794617ba13bSMingming Cao * ext4_create() quota_sync() 4795dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4796871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4797dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4798ac27a0ecSDave Kleikamp * 4799ac27a0ecSDave Kleikamp */ 4800ac27a0ecSDave Kleikamp 4801ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4802ac27a0ecSDave Kleikamp 4803ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4804ac27a0ecSDave Kleikamp { 4805ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4806ac27a0ecSDave Kleikamp } 4807ac27a0ecSDave Kleikamp 4808617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4809ac27a0ecSDave Kleikamp { 4810ac27a0ecSDave Kleikamp int ret, err; 4811ac27a0ecSDave Kleikamp handle_t *handle; 4812ac27a0ecSDave Kleikamp struct inode *inode; 4813ac27a0ecSDave Kleikamp 4814ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4815617ba13bSMingming Cao handle = ext4_journal_start(inode, 4816617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4817ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4818ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4819ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4820617ba13bSMingming Cao err = ext4_journal_stop(handle); 4821ac27a0ecSDave Kleikamp if (!ret) 4822ac27a0ecSDave Kleikamp ret = err; 4823ac27a0ecSDave Kleikamp return ret; 4824ac27a0ecSDave Kleikamp } 4825ac27a0ecSDave Kleikamp 4826617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4827ac27a0ecSDave Kleikamp { 4828ac27a0ecSDave Kleikamp int ret, err; 4829ac27a0ecSDave Kleikamp handle_t *handle; 4830ac27a0ecSDave Kleikamp 4831617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4832617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4833ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4834ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4835ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4836617ba13bSMingming Cao err = ext4_journal_stop(handle); 4837ac27a0ecSDave Kleikamp if (!ret) 4838ac27a0ecSDave Kleikamp ret = err; 4839ac27a0ecSDave Kleikamp return ret; 4840ac27a0ecSDave Kleikamp } 4841ac27a0ecSDave Kleikamp 4842617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4843ac27a0ecSDave Kleikamp { 4844ac27a0ecSDave Kleikamp int ret, err; 4845ac27a0ecSDave Kleikamp handle_t *handle; 4846ac27a0ecSDave Kleikamp 4847617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4848617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 48499c3013e9SJan Kara if (IS_ERR(handle)) { 48509c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 48519c3013e9SJan Kara dquot_release(dquot); 4852ac27a0ecSDave Kleikamp return PTR_ERR(handle); 48539c3013e9SJan Kara } 4854ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4855617ba13bSMingming Cao err = ext4_journal_stop(handle); 4856ac27a0ecSDave Kleikamp if (!ret) 4857ac27a0ecSDave Kleikamp ret = err; 4858ac27a0ecSDave Kleikamp return ret; 4859ac27a0ecSDave Kleikamp } 4860ac27a0ecSDave Kleikamp 4861617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4862ac27a0ecSDave Kleikamp { 48632c8be6b2SJan Kara /* Are we journaling quotas? */ 4864617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4865617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4866ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4867617ba13bSMingming Cao return ext4_write_dquot(dquot); 4868ac27a0ecSDave Kleikamp } else { 4869ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4870ac27a0ecSDave Kleikamp } 4871ac27a0ecSDave Kleikamp } 4872ac27a0ecSDave Kleikamp 4873617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4874ac27a0ecSDave Kleikamp { 4875ac27a0ecSDave Kleikamp int ret, err; 4876ac27a0ecSDave Kleikamp handle_t *handle; 4877ac27a0ecSDave Kleikamp 4878ac27a0ecSDave Kleikamp /* Data block + inode block */ 4879617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4880ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4881ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4882ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4883617ba13bSMingming Cao err = ext4_journal_stop(handle); 4884ac27a0ecSDave Kleikamp if (!ret) 4885ac27a0ecSDave Kleikamp ret = err; 4886ac27a0ecSDave Kleikamp return ret; 4887ac27a0ecSDave Kleikamp } 4888ac27a0ecSDave Kleikamp 4889ac27a0ecSDave Kleikamp /* 4890ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4891ac27a0ecSDave Kleikamp * the quota file and such... 4892ac27a0ecSDave Kleikamp */ 4893617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4894ac27a0ecSDave Kleikamp { 4895287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4896617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4897ac27a0ecSDave Kleikamp } 4898ac27a0ecSDave Kleikamp 4899ac27a0ecSDave Kleikamp /* 4900ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4901ac27a0ecSDave Kleikamp */ 4902617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4903f00c9e44SJan Kara struct path *path) 4904ac27a0ecSDave Kleikamp { 4905ac27a0ecSDave Kleikamp int err; 4906ac27a0ecSDave Kleikamp 4907ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4908ac27a0ecSDave Kleikamp return -EINVAL; 49090623543bSJan Kara 4910ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4911d8c9584eSAl Viro if (path->dentry->d_sb != sb) 4912ac27a0ecSDave Kleikamp return -EXDEV; 49130623543bSJan Kara /* Journaling quota? */ 49140623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 49152b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4916f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4917b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4918b31e1552SEric Sandeen "Quota file not on filesystem root. " 4919b31e1552SEric Sandeen "Journaled quota will not work"); 49200623543bSJan Kara } 49210623543bSJan Kara 49220623543bSJan Kara /* 49230623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 49240623543bSJan Kara * all updates to the file when we bypass pagecache... 49250623543bSJan Kara */ 49260390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4927f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 49280623543bSJan Kara /* 49290623543bSJan Kara * We don't need to lock updates but journal_flush() could 49300623543bSJan Kara * otherwise be livelocked... 49310623543bSJan Kara */ 49320623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 49337ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 49340623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4935f00c9e44SJan Kara if (err) 49367ffe1ea8SHidehiro Kawai return err; 49377ffe1ea8SHidehiro Kawai } 49380623543bSJan Kara 4939f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4940ac27a0ecSDave Kleikamp } 4941ac27a0ecSDave Kleikamp 49427c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 49437c319d32SAditya Kali unsigned int flags) 49447c319d32SAditya Kali { 49457c319d32SAditya Kali int err; 49467c319d32SAditya Kali struct inode *qf_inode; 49477c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 49487c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 49497c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 49507c319d32SAditya Kali }; 49517c319d32SAditya Kali 49527c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 49537c319d32SAditya Kali 49547c319d32SAditya Kali if (!qf_inums[type]) 49557c319d32SAditya Kali return -EPERM; 49567c319d32SAditya Kali 49577c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 49587c319d32SAditya Kali if (IS_ERR(qf_inode)) { 49597c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 49607c319d32SAditya Kali return PTR_ERR(qf_inode); 49617c319d32SAditya Kali } 49627c319d32SAditya Kali 49637c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 49647c319d32SAditya Kali iput(qf_inode); 49657c319d32SAditya Kali 49667c319d32SAditya Kali return err; 49677c319d32SAditya Kali } 49687c319d32SAditya Kali 49697c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 49707c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 49717c319d32SAditya Kali { 49727c319d32SAditya Kali int type, err = 0; 49737c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 49747c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 49757c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 49767c319d32SAditya Kali }; 49777c319d32SAditya Kali 49787c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 49797c319d32SAditya Kali for (type = 0; type < MAXQUOTAS; type++) { 49807c319d32SAditya Kali if (qf_inums[type]) { 49817c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 49827c319d32SAditya Kali DQUOT_USAGE_ENABLED); 49837c319d32SAditya Kali if (err) { 49847c319d32SAditya Kali ext4_warning(sb, 49857c319d32SAditya Kali "Failed to enable quota (type=%d) " 49867c319d32SAditya Kali "tracking. Please run e2fsck to fix.", 49877c319d32SAditya Kali type); 49887c319d32SAditya Kali return err; 49897c319d32SAditya Kali } 49907c319d32SAditya Kali } 49917c319d32SAditya Kali } 49927c319d32SAditya Kali return 0; 49937c319d32SAditya Kali } 49947c319d32SAditya Kali 49957c319d32SAditya Kali /* 49967c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 49977c319d32SAditya Kali */ 49987c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 49997c319d32SAditya Kali int format_id) 50007c319d32SAditya Kali { 50017c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 50027c319d32SAditya Kali return -EINVAL; 50037c319d32SAditya Kali 50047c319d32SAditya Kali /* 50057c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 50067c319d32SAditya Kali */ 50077c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 50087c319d32SAditya Kali } 50097c319d32SAditya Kali 5010ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5011ca0e05e4SDmitry Monakhov { 501221f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 501321f97697SJan Kara handle_t *handle; 501421f97697SJan Kara 501587009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 501687009d86SDmitry Monakhov * Caller already holds s_umount sem */ 501787009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5018ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5019ca0e05e4SDmitry Monakhov 50200b268590SAmir Goldstein if (!inode) 50210b268590SAmir Goldstein goto out; 50220b268590SAmir Goldstein 502321f97697SJan Kara /* Update modification times of quota files when userspace can 502421f97697SJan Kara * start looking at them */ 502521f97697SJan Kara handle = ext4_journal_start(inode, 1); 502621f97697SJan Kara if (IS_ERR(handle)) 502721f97697SJan Kara goto out; 502821f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 502921f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 503021f97697SJan Kara ext4_journal_stop(handle); 503121f97697SJan Kara 503221f97697SJan Kara out: 5033ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5034ca0e05e4SDmitry Monakhov } 5035ca0e05e4SDmitry Monakhov 50367c319d32SAditya Kali /* 50377c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 50387c319d32SAditya Kali */ 50397c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 50407c319d32SAditya Kali { 50417c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 50427c319d32SAditya Kali return -EINVAL; 50437c319d32SAditya Kali 50447c319d32SAditya Kali /* Disable only the limits. */ 50457c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 50467c319d32SAditya Kali } 50477c319d32SAditya Kali 5048ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5049ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5050ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5051ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5052617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5053ac27a0ecSDave Kleikamp size_t len, loff_t off) 5054ac27a0ecSDave Kleikamp { 5055ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5056725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5057ac27a0ecSDave Kleikamp int err = 0; 5058ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5059ac27a0ecSDave Kleikamp int tocopy; 5060ac27a0ecSDave Kleikamp size_t toread; 5061ac27a0ecSDave Kleikamp struct buffer_head *bh; 5062ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5063ac27a0ecSDave Kleikamp 5064ac27a0ecSDave Kleikamp if (off > i_size) 5065ac27a0ecSDave Kleikamp return 0; 5066ac27a0ecSDave Kleikamp if (off+len > i_size) 5067ac27a0ecSDave Kleikamp len = i_size-off; 5068ac27a0ecSDave Kleikamp toread = len; 5069ac27a0ecSDave Kleikamp while (toread > 0) { 5070ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5071ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 5072617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 5073ac27a0ecSDave Kleikamp if (err) 5074ac27a0ecSDave Kleikamp return err; 5075ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5076ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5077ac27a0ecSDave Kleikamp else 5078ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5079ac27a0ecSDave Kleikamp brelse(bh); 5080ac27a0ecSDave Kleikamp offset = 0; 5081ac27a0ecSDave Kleikamp toread -= tocopy; 5082ac27a0ecSDave Kleikamp data += tocopy; 5083ac27a0ecSDave Kleikamp blk++; 5084ac27a0ecSDave Kleikamp } 5085ac27a0ecSDave Kleikamp return len; 5086ac27a0ecSDave Kleikamp } 5087ac27a0ecSDave Kleikamp 5088ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5089ac27a0ecSDave Kleikamp * enough credits) */ 5090617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5091ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5092ac27a0ecSDave Kleikamp { 5093ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5094725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5095ac27a0ecSDave Kleikamp int err = 0; 5096ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5097ac27a0ecSDave Kleikamp struct buffer_head *bh; 5098ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5099ac27a0ecSDave Kleikamp 51000390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5101b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5102b31e1552SEric Sandeen " cancelled because transaction is not started", 51039c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 51049c3013e9SJan Kara return -EIO; 51059c3013e9SJan Kara } 510667eeb568SDmitry Monakhov /* 510767eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 510867eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 510967eeb568SDmitry Monakhov */ 511067eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 511167eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 511267eeb568SDmitry Monakhov " cancelled because not block aligned", 511367eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 511467eeb568SDmitry Monakhov return -EIO; 511567eeb568SDmitry Monakhov } 511667eeb568SDmitry Monakhov 5117617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 5118ac27a0ecSDave Kleikamp if (!bh) 5119ac27a0ecSDave Kleikamp goto out; 5120617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5121ac27a0ecSDave Kleikamp if (err) { 5122ac27a0ecSDave Kleikamp brelse(bh); 5123ac27a0ecSDave Kleikamp goto out; 5124ac27a0ecSDave Kleikamp } 5125ac27a0ecSDave Kleikamp lock_buffer(bh); 512667eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5127ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5128ac27a0ecSDave Kleikamp unlock_buffer(bh); 51290390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5130ac27a0ecSDave Kleikamp brelse(bh); 5131ac27a0ecSDave Kleikamp out: 51320b7f7cefSJan Kara if (err) 5133ac27a0ecSDave Kleikamp return err; 513467eeb568SDmitry Monakhov if (inode->i_size < off + len) { 513567eeb568SDmitry Monakhov i_size_write(inode, off + len); 5136617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5137617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 513821f97697SJan Kara } 513967eeb568SDmitry Monakhov return len; 5140ac27a0ecSDave Kleikamp } 5141ac27a0ecSDave Kleikamp 5142ac27a0ecSDave Kleikamp #endif 5143ac27a0ecSDave Kleikamp 5144152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5145152a0836SAl Viro const char *dev_name, void *data) 5146ac27a0ecSDave Kleikamp { 5147152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5148ac27a0ecSDave Kleikamp } 5149ac27a0ecSDave Kleikamp 515037f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 515124b58424STheodore Ts'o static inline void register_as_ext2(void) 515224b58424STheodore Ts'o { 515324b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 515424b58424STheodore Ts'o if (err) 515524b58424STheodore Ts'o printk(KERN_WARNING 515624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 515724b58424STheodore Ts'o } 515824b58424STheodore Ts'o 515924b58424STheodore Ts'o static inline void unregister_as_ext2(void) 516024b58424STheodore Ts'o { 516124b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 516224b58424STheodore Ts'o } 51632035e776STheodore Ts'o 51642035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 51652035e776STheodore Ts'o { 51662035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 51672035e776STheodore Ts'o return 0; 51682035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 51692035e776STheodore Ts'o return 1; 51702035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 51712035e776STheodore Ts'o return 0; 51722035e776STheodore Ts'o return 1; 51732035e776STheodore Ts'o } 517451b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 517524b58424STheodore Ts'o #else 517624b58424STheodore Ts'o static inline void register_as_ext2(void) { } 517724b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 51782035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 517924b58424STheodore Ts'o #endif 518024b58424STheodore Ts'o 518137f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 518224b58424STheodore Ts'o static inline void register_as_ext3(void) 518324b58424STheodore Ts'o { 518424b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 518524b58424STheodore Ts'o if (err) 518624b58424STheodore Ts'o printk(KERN_WARNING 518724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 518824b58424STheodore Ts'o } 518924b58424STheodore Ts'o 519024b58424STheodore Ts'o static inline void unregister_as_ext3(void) 519124b58424STheodore Ts'o { 519224b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 519324b58424STheodore Ts'o } 51942035e776STheodore Ts'o 51952035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 51962035e776STheodore Ts'o { 51972035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 51982035e776STheodore Ts'o return 0; 51992035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 52002035e776STheodore Ts'o return 0; 52012035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 52022035e776STheodore Ts'o return 1; 52032035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 52042035e776STheodore Ts'o return 0; 52052035e776STheodore Ts'o return 1; 52062035e776STheodore Ts'o } 520751b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 520824b58424STheodore Ts'o #else 520924b58424STheodore Ts'o static inline void register_as_ext3(void) { } 521024b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 52112035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 521224b58424STheodore Ts'o #endif 521324b58424STheodore Ts'o 521403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5215ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 521603010a33STheodore Ts'o .name = "ext4", 5217152a0836SAl Viro .mount = ext4_mount, 5218ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5219ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5220ac27a0ecSDave Kleikamp }; 5221ac27a0ecSDave Kleikamp 52228f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5223857ac889SLukas Czerner { 5224857ac889SLukas Czerner struct ext4_features *ef; 5225857ac889SLukas Czerner int ret = -ENOMEM; 5226857ac889SLukas Czerner 5227857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5228857ac889SLukas Czerner if (!ef) 5229857ac889SLukas Czerner goto out; 5230857ac889SLukas Czerner 5231857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5232857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5233857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5234857ac889SLukas Czerner "features"); 5235857ac889SLukas Czerner if (ret) { 5236857ac889SLukas Czerner kfree(ef); 5237857ac889SLukas Czerner goto out; 5238857ac889SLukas Czerner } 5239857ac889SLukas Czerner 5240857ac889SLukas Czerner ext4_feat = ef; 5241857ac889SLukas Czerner ret = 0; 5242857ac889SLukas Czerner out: 5243857ac889SLukas Czerner return ret; 5244857ac889SLukas Czerner } 5245857ac889SLukas Czerner 52468f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 52478f021222SLukas Czerner { 52488f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 52498f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 52508f021222SLukas Czerner kfree(ext4_feat); 52518f021222SLukas Czerner } 52528f021222SLukas Czerner 5253e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5254e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5255e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5256e9e3bcecSEric Sandeen 52575dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5258ac27a0ecSDave Kleikamp { 5259e9e3bcecSEric Sandeen int i, err; 5260c9de560dSAlex Tomas 526107c0c5d8SAl Viro ext4_li_info = NULL; 526207c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 526307c0c5d8SAl Viro 526412e9b892SDmitry Monakhov ext4_check_flag_values(); 5265e9e3bcecSEric Sandeen 5266e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5267e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5268e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5269e9e3bcecSEric Sandeen } 5270e9e3bcecSEric Sandeen 52715dabfc78STheodore Ts'o err = ext4_init_pageio(); 52726fd058f7STheodore Ts'o if (err) 52736fd058f7STheodore Ts'o return err; 52745dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5275bd2d0210STheodore Ts'o if (err) 5276d44651d0SFabrice Jouhaud goto out6; 52773197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 52783197ebdbSTheodore Ts'o if (!ext4_kset) 5279dd68314cSTheodore Ts'o goto out5; 5280d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5281857ac889SLukas Czerner 5282857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5283dd68314cSTheodore Ts'o if (err) 5284dd68314cSTheodore Ts'o goto out4; 5285857ac889SLukas Czerner 52865dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5287ac27a0ecSDave Kleikamp if (err) 52886fd058f7STheodore Ts'o goto out3; 5289c9de560dSAlex Tomas 52905dabfc78STheodore Ts'o err = ext4_init_xattr(); 5291c9de560dSAlex Tomas if (err) 5292c9de560dSAlex Tomas goto out2; 5293ac27a0ecSDave Kleikamp err = init_inodecache(); 5294ac27a0ecSDave Kleikamp if (err) 5295ac27a0ecSDave Kleikamp goto out1; 529624b58424STheodore Ts'o register_as_ext3(); 52972035e776STheodore Ts'o register_as_ext2(); 529803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5299ac27a0ecSDave Kleikamp if (err) 5300ac27a0ecSDave Kleikamp goto out; 5301bfff6873SLukas Czerner 5302ac27a0ecSDave Kleikamp return 0; 5303ac27a0ecSDave Kleikamp out: 530424b58424STheodore Ts'o unregister_as_ext2(); 530524b58424STheodore Ts'o unregister_as_ext3(); 5306ac27a0ecSDave Kleikamp destroy_inodecache(); 5307ac27a0ecSDave Kleikamp out1: 53085dabfc78STheodore Ts'o ext4_exit_xattr(); 5309c9de560dSAlex Tomas out2: 53105dabfc78STheodore Ts'o ext4_exit_mballoc(); 53116fd058f7STheodore Ts'o out3: 53128f021222SLukas Czerner ext4_exit_feat_adverts(); 53136fd058f7STheodore Ts'o out4: 5314d44651d0SFabrice Jouhaud if (ext4_proc_root) 5315dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5316dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5317d44651d0SFabrice Jouhaud out5: 5318dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5319d44651d0SFabrice Jouhaud out6: 53205dabfc78STheodore Ts'o ext4_exit_pageio(); 5321ac27a0ecSDave Kleikamp return err; 5322ac27a0ecSDave Kleikamp } 5323ac27a0ecSDave Kleikamp 53245dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5325ac27a0ecSDave Kleikamp { 5326bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 532724b58424STheodore Ts'o unregister_as_ext2(); 532824b58424STheodore Ts'o unregister_as_ext3(); 532903010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5330ac27a0ecSDave Kleikamp destroy_inodecache(); 53315dabfc78STheodore Ts'o ext4_exit_xattr(); 53325dabfc78STheodore Ts'o ext4_exit_mballoc(); 53338f021222SLukas Czerner ext4_exit_feat_adverts(); 53349f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 53353197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 53365dabfc78STheodore Ts'o ext4_exit_system_zone(); 53375dabfc78STheodore Ts'o ext4_exit_pageio(); 5338ac27a0ecSDave Kleikamp } 5339ac27a0ecSDave Kleikamp 5340ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 534183982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5342ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 53435dabfc78STheodore Ts'o module_init(ext4_init_fs) 53445dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5345